Abstract:In order to determine the best extraction technology of polyphenol from Chrysanthemum morifolium Ramat.and evaluate their antioxidant activity, and analyze the chemical composition, SDS concentration, liquid-solid ratio, ultrasonic time and ultrasonic temperature as single factor were tested and then the extraction process of the polyphenol from Chrysanthemum morifolium Ramat.was optimized by response surface designs based on single factor experiments. In addition, the antioxidant activity of polyphenol from Chrysanthemum morifolium Ramat. was measured using the total reducing power, l1-diphenyl-2-picryhydrazyl radical (DPPH) and hydroxyl radical (OH) scavenging. The results showed that the polyphenol of optium extraction conditions of Chrysanthemum morifolium Ramat.were as follows: SDS concentration 1.50%, liquid-solid ratio 25 mL/g, ultrasonic time 24 min and ultrasonic temperature 65℃. Under these conditions, an extraction rate of 12.412 mg/g for polyphenol from Chrysanthemum morifolium Ramat.was obtained, compared with the predictive value of 12.59 mg/g, the relative error was 1.442%. The ED50 values of the total reducing power, scavenging OH radical were 9.00, 148.862μL, stronger than that of VC (20.00, 219.050μL) and BHT (415.00, 487.46μL); The scavenging DPPH radical (ED50 was 8.201μL) was weaker than that of VC, but stronger than that of BHT (ED50 was 86.06μL). The results of Chromatography analysis with HPLC show that isochlorogenicacid A, galuteolin, chlorogenic Acid, are the main components existing in polyphenols.The content of 3 respective components were 5.8704 3.1306 and 3.1025mg/g. The extraction process was stable and reasonable, accurate and reliable, and it can be used to extract the polyphenol from Chrysanthemum morifolium Ramat.The result will provide basis for the further development and utilization of polyphenols of Chrysanthemum morifolium Ramat..

Abstract:Abstract: Four decomposable rosin based ester surfactants were obtained by acyl chlorination, esterification, phosphate reaction and salt formation using dehydroabietic acid recrystallized from disproportionation rosin as raw material. The structures of rosin based surfactants were identified by FT-IR and NMR. Critical micelle concentration (CMC), the surface tension, the foam performance (FP), and the emulsifying properties (EP) were also discussed. The research showed that I, II, SAA-III and SAA-IV had good surface activity, the CMC values were 4.69×10-3 mol/L, 5.15×10-3 mol/L, 2.65×10-3 mol/L and 1.71×10-3 mol/L, respectively. The γcmc values were 48.2 mN/m、41.4 mN/m、34.6 mN/m and 33.2 mN/m. The surface properties of rosin phosphate esters were superior to rosin esters, and the times for 10 mL water out from paraffin/water emulsion system were 11 s、128 s、90 s and 98 s. The initial foam heights of the surfactants were 16 mm、18.5 mm、18 mm and 23 mm. The foam heights were 6 mm、4 mm、4 mm and 11.5 mm after 5 minutes. Hydrophobicity of rosin based ester surfactants I and II were weaker, and the cloud point temperature was about 90 °C. The Kraff temperature of rosin phosphate esters SAA-III and SAA-IV was about 40°C. The cloud point and krafft point increased while carbon chain lengthened. The decomposition performance study of surfactant SAA-III shows that it can be decomposed completely in the pH = 3 and 11, 140 °C and 180 °C. The experiment suggests that SAA-III may be a phosphate source of organic phosphorus.

Abstract:In order to explore the application of fenugreek in skincare products,fenugreek seeds extract was used as raw materials in preparation of moisturizing cream,antioxidant cream,moisturizing water.The physical and chemical indexes,stability,moisturizing and antioxidation ,sunscreen,safety and antibacterial.The results indicated that the sensory,physical&chemical properties of the moisturizing cream and antioxidant cream,moisturizing water corresponding with the requirements of Chinese industrial standard QB/T1857-2013,QB/T2660-2004.The addition of fenugreek extract makes skincare products with antibacterial properties.In addition,fenugreek skincare products have better moisturizing effect and great sunscreen.At the same time,the fenugreek antioxidant cream can effectively remove the free radical from skin surface,and the clearance rates were 95.2%, 68.2% and 85.5% after it interacted with wheat germ oil, grape seed oil, vitamin E on 2,2-N-N-bis(3-ethylbenzothiazole-6-sulfonic acid) radical(ABTS+·),hydroxyl radical(·OH) and superoxide radical (·O2-).

Abstract:Waterborne polyurethane polyacrylate emulsion (WPUA) was synthesized with thermotolerant polyester diol (NCL), 4,4’-dicyclohexyl methane diisocyanate(HMDI) and methyl methacrylate (MMA) as raw materials, using both carboxylic acid and sulfonate as hydrophilic chain extender agent. WPUA with zero VOC and no triethylamine was prepared by solvent-free method to meet the requirements of cigarette packaging industry. The WPUA emulsions and films were characterized by FT-IR, transmission electron microscope(TEM), partical size analysis and thermogravimetric analysis(TGA). The effects of different kinds of isocyanates, polyalcohol and chain extender on thermal stability of the WPUA films were investigated. The results showed that the average particle size of the emulsion was reduced due to the addition of aliphatic diamine sulphonate(AAS). TGA results showed that the decomposition temperature of WPUA5 film synthesized by NCL, HMDI and novel chain extender hydroquinone bis(β-ethyl) ether(HQEE) was higher than that of WPUA2 film synthesized by polycaprolactone diol(PCL), isophorone diisocyanate(IPDI) and 1,4-Butanediol(BDO), the decomposition temperature increased by 60.96℃, 69.37℃, 139.70℃ when the mass loss rate of WPUA film was 20%, 30%, 50%. And the crystallization and glass transition temperature (Tg) of polyurethane both increased with the enhancement of the symmetry of molecules.

Abstract:Phosphorized polyaniline(P-PANI) was synthesized by using the chemical oxide method with phytic acid(PhA) as a dopant, and after mixed with silicon resin(SiR), it was applied to the surface of magnesium-lithium(Mg-Li) alloy to prepare P-PANI/SiR composite anticorrosion coatings. The structure of P-PANI was characterized by Fourier transform infrared spectrum(FTIR), ultraviolet-visible-near infrared spectrum(UV-Vis-NIR) and X-ray photoelectron spectroscopy(XPS). The influence of different content of P-PANI in composite coatings on the hydrophobicity, adhension and anticorrosion performance of the composite coatings were investigated. The results show that the composite coating has better hydrophobic property and anticorrosion performance when the mass fraction of P-PANI in SiR is 2.0%. The water contact angle(CA) of the coating is 125.4°, the dry and wet adhesion are both 0 grade. The corrosion current density is 5.15×10-10 A/cm2, and the electrochemical impedance values reaches 108 Ω•cm2.

Abstract:The synthesis of furfural via solid acid-catalyzed dehydration of D-xylose is considered to be highly economic, easy separation and environment-friendly. In this work, the catalytic performances of different carbon- based solid acids have been investigated on the dehydration of D-xylose in detail. The used carbon-based solid acids include polymeric lignosulfonate materials (LF-A, LF-B, LF-C, LF-D) and sulfonated carbons (FS), in which the polymeric lignosulfonate material was obtained through phenol-formaldehyde condensation reaction of lignonsulfonate with aldehyde, and sulfonated carbon was prepared using the hydro-thermal synthesis method with furfural and sodium dodecyl benzene sulfonate (SDBS) as the raw materials. The influences of various catalysts, reaction media, reaction time, dosage of catalyst and temperature on the D-xylose dehydration were investigated, respectively. As a result, it was found that catalytic activity of LF-A is higher than those of other catalysts where more than 72.9% yield of furfural was obtained for 4 h at 170 oC in γ-butyrolactone solvent. Moreover, these catalytic materials are detected with XRD, FT-IR, TG-DTG, SEM and TEM techniques, and the relationship between the structures and their activities has been also discussed.

Abstract:Objective: In this study, 5-fluorouracil as the drug model molecules, and gelatin as the carrier of matrine. Methods: The gelatin nanoparticles were prepared by coacervation method, the surface morphology and particle size of the gelatin nanoparticles were observed by Transmission electron microscope (TEM) and Dynamic light scattering (DLS), it's envelopment rate and drug loadings were calculated and the sustained-release effect were detected in vitro. Results: The gelatin nanoparticles had a good surface morphology, the average particle size was 65.1?2.1 nm, dispersed uniformly. The envelopment rate and drug loadings of 5-fluorouracil/ gelatin were 23.5?1.9 % and 69.7?0.5 % respectively. In vitro release experiments displayed that the release of 5-fluorouracil/gelatin nanocomposite accorded with the Higuchi equation, indicating that the gelatin could sustain the release of 5-fluorouracil. MTT measurement showed that the 5-fluorouracil/gelatin nanocomposite has significant cytotoxicity on human gastric cancer cells (SGC7901). Conclusion: The prepared 5-fluorouracil/gelatin nanocomposite has good properties of sustainab release and cytotoxicity and could be used as a kind of drug-loading carrier in the pharmaceutical field.

Abstract:With 4,4'-diaminostilbene-2,2'-disulfonic acid (DSD acid) as the luminescent parent and cyanuric chloride as the crosslinking agent, a pendant chitosan oligosaccharide fluorescent oligomer （COS-FBs）was synthesized by nucleophilic substitution reaction. A fluorescent nanoparticle polymer （SiO2/ COS-FBs）was prepared with COS-FBs as material by the improved Stober synthesis method. Its structure, morphology and particle size were studied by FTIR, XPS, TEM and their photophysical properties were studied by UV spectra and photoluminescence. At the same time, the effect of returning to yellow on paper was also investigated by UV aging experiment. The results showed that the synthesized fluorescent nanoparticles （SiO2/ COS-FBs）had regular spherical structure with a particle size of 90 nm. Compared with the fluorescent oligomers without nano modification, UV absorption was broadened, fluorescence intensity was improved, the brightening effect and light stability were nice in the performance of application.

Abstract:P(HEA-co-6CQ) Polymers Hydrogels of four ratios was prepared by the UV polymerization, Using the tetraethylene glycol dimethacrylate as cross-linking agent. The temperature, time and electrolyte solution’s influence on the swelling behavior were studied. The result showed that the hydrogels has no strong reliance on temperature, and there is no obvious change on the swelling rate between the low temperature and high temperature. Swelling time has a less impact on hydrogels, but it can achieve swelling equilibrium about 4h. The effect of electrolyte solution on hydrogel is relatively large, and the swelling ratio is obviously lower than that in deionized water. The thermogravimetric analysis showed that the hydrogel was stable at 230 ?C. The product structure was characterized by IR and NMR spectra.

Abstract:Oil adsorption materials with hierarchical pores were successfully synthesized using agriculture solid wastes kenaf core (KC) as precursors. Typically, the base materials were firstly pretreated by high shear dispersion and then freeze-dried and subsequently modified by MTMS. The as-prepared samples were further characterized by a series of techniques including SEM, FTIR, XRD and BET etc. to determine the morphology structure, physicochemical properties and thermal stability. The obtained materials possessed promising super-hydrophilic feature with a density of 0.019g/cm3 which enabled it float on the water surface and was favorable for the rapid adsorption of oil and organic solvent. Additionally, the influence of kenaf core sizes, basicity and solid concentration in suspension were deeply investigated. Herein, the experimental results indicated that the optimal adsorption conditions for oil were as following: particle sizes of kenaf core (20-40mesh), 40g/L NaOH and 10g/L KC. Interestingly, the materials could adsorb as many as 20-45 times of its own mass for DMSO, CCl4, diesel and crude oil etc within 30s. This might shed light on the development of novel adsorbent.

Abstract:To comparatively analyze the composition and content of free amino acids in pork, beef and chicken enzymatic hydrolysate, the free amino acid was detected by automatic amino acid analyzer. To determine the contribution rate of free amino acids to the taste of pork, beef and chicken enzymatic hydrolysate, taste active value (TAV) was detected. The results indicated that the ratio of flavor amino acids and taste active value of sweet and umami amino acids in chicken enzymatic hydrolysate were all higher than pork and beef enzymatic hydrolysate, and the largest value of taste active value in 3 enzymatic hydrolysates were histidine, and the second one was phenylalanine. So the pork, beef and chicken enzymatic hydrolysate were bitterness-based.

Abstract:Different pharmacophore structures were introduced to the 3-hydroxy-indolin-2-one core scaffold by Aldol condensation reaction, and several new fluorine-containing 3-hydroxy-indolin-2-one derivatives were designed and prepared. Their structures were identified by 1HNMR, 13CNMR and HRMS. And the antiproliferative activities of target molecules against non-small cell lung cancer A549 cells were evaluated by CCK-8 assay.The results showed that compounds IIIe and IIIf displayed stronger antiproliferative activities, with IC50 values of 19.494 and 24.804 μmol/L, respectively. Flow cytometry and Hoechst 33342 staining demonstrated that compound IIIe could trigger cell cycle arrest at G2 phase and induce apoptosis of A549 cells. Moreover, western blot indicated that compound IIIe could upregulate the levels of P53 and Cleaved Caspase-3, and downregulate the level of Survivin.Molecular docking simulation showed that compound IIIe could bind to the ATP pocket of PI3K-δ.Together, these data revealed that compound IIIe maybe a potential candidate for the treatment of non-small cell lung cancer.

Abstract:Hydrophobic modified cationic collagen flocculant P(C-AM-DAC-BA) was synthesized by graft copolymerization using gelatin which was extracted from leather wastes as raw materials, acrylamide (AM), acryloyl oxyethyl trimethyl ammonium chloride (DAC) and butyl acrylate (BA) as the monomer (AM: DAC: BA molar ratio is 80:18:2), meanwhile, the synthesis reaction was initiated with tert buty hydroperoxide and focal sulfite sodium. The influences of the molar ratio of gelatin and monomer, initiator dosage, grafting temperature and grafting time on flocculation effects to the oilfield simulated wastewater were investigated. The synthesis conditions of P(C-AM-DAC-BA) were optimized by response surface methodology, and the optimum conditions were as follows: the molar ratio of gelatin and monomer of 1:2.04, initiator dosage of 0.032mol/L, grafting temperature of 49.2℃, grafting time of 2.8h. Under these conditions, the turbidity removal rate was 91.5%.

Abstract:A microspheres (CA/BC7) was prepared using calcium alginate (CA) encapsulated biochar (BC7) as the green adsorbent for Cu(II) removal from aqueous solution. The effects of the initial Cu(II) concentration, initial pH value of Cu(II) solution and equilibrium contact time were investigated. The isothermal thermodynamic datas of the BC7 and CA/BC7 conformed to the Langmuir model. The maximum adsorption capacity of the BC7 and CA/BC7 from the Langmuir equation were 20.28 mg?g-1 and 35.46 mg?g-1 at pH=5. The adsorptions of Cu(II) by the BC7 and CA/BC7 were in good agreement with pseudo-first-order model, which suggested that the rate limiting step was governed by diffusion. Mechanism studies for Cu(II) removal by BC7 showed that the nature of Cu(II) abstraction took place through the formation of Cu(II)-O-Si and Cu(II)-Complex. The Cu(II) removal by the CA/BC7 were mainly through the ion exchange between Ca (II) and Cu(II) as well as the formation of coordination complex.

Abstract:Magnetic metal organic skeleton materials have the characteristics of ability to increase drug targeting. Based on the previous experiments, Fe3O4@ZIF-8 was prepared by hydrothermal method using FeCl3?6H2O, sodium acetate, Zn（NO3)2?6H2O and 2-methylimidazole as the main raw materials. Magnetic metal organic skeleton material. The materials were characterized . The material was used as the drug carrier and the loaded drug tetracycline was used as the main evaluation index and detected by UV spectrophotometer. The results showed that the saturated loading reached 12.296mg / g under the conditions of pH = 9, material dosage 5mg and drug concentration 30mg / L.

Abstract:Intermediate N,N’-bis(2,6-diisopropylphenyl)-1,6,7,12-tetrachloroperylene-3,4,9,10- tetracarboxylic acid diimide (BDIP-TCPBI) and product N,N’-bis(2,6-diisopropylphenyl)- 1,6,7,12-tetraphenoxyperylene-3,4,9,10-tetracarboxylic acid diimide (perylene red) were synthesized from commercially available 1,6,7,12-tetrachloroperylene-3,4,9,10-tetracarboxylic bisanhydride (TCPBA), and their structures were characterized with IR, MS and NMR spectra. The reaction time of BDIP-TCPBI was shortened by half and its purity was increased by 23% in the presence of zinc acetate dihydrate as catalyst. The optimum synthesis conditions of BDIP-TCPBI were determined that the molar ratio of n(TCPBA) : n(2,6-Diisopropylaniline) : n(zinc acetate dihydrate) : n(propionic acid) was 1:4:0.2:107 for 12 h at 120°C, the yield and purity of BDIP-TCPBI were 88% and 84%, respectively. Using a simple washing method instead of column chromatography, the purity of perylene red was increased by 10%. This preparation was efficient, green and valuable in practical application. The spectra study indicated that the stokes shift of perylene red was 35 nm. From the estimation of cyclic voltammetry, the LUMO and HOMO orbital energy levels of perylene red were -4.144 eV and -4.470 eV, respectively. Perylene red was a potential electron acceptor material with a weak fluorescence self-absorption.

Abstract:Bacterial cellulose (BC) is a kind of cellulose produced through microbial fermentation, which has a unique structure and physiochemical properties. BC has a lot of hydroxyl groups, ultra-fine fiber network, and high specific surface area, which enable BC have good adsorption properties to the metal ions in aqueous solution. The preparation conditions (including bacteria, carbon sources, additives) of BC are reviewed. The adsorption and the adsorption mechanism of heavy metal ions on BC are also reviewed and outlooked.

Abstract:Three red-emitting delayed fluorescence compounds (1-TPA-AQ，1,4-2TPA-AQ, and 1,8-2TPA-AQ) based on triphenylamine (TPA) α-substituted anthraquinone have been synthesized by Suzuki cross-coupling reactions. The photophysical and electrochemical properties of these compounds have been systematically characterized by theoretical calculations, UV-vis, fluorescence, and cyclic voltammetry (CV) measurements. These compounds have small energy gaps between singlet and triplet (ΔEST) of 0.08 eV, 0.09 eV, and 0.06 eV, highest occupied molecular orbital (HOMO) energy levels of -5.26, -5.23, and -5.27 eV, and lowest unoccupied molecular orbital (LUMO) energy levels of -3.14, -3.10, and -3.10 eV, respectively. 1-TPA-AQ, 1,4-2TPA-AQ, and 1,8-2TPA-AQ exhibit red emission color with peaks at 648, 649, and 636 nm , delayed fluorescent lifetime of 1.6, 2.6, and 2.1 μs, respectively. The results indicate that these compounds may be potential red-emitting delayed fluorescence materials.

Abstract:A sort of hydrophobic poly(dodecyl/methylsilsesquioxane) nanoparticles (PDMSQ NPs) were prepared by the hydrolysis-condensation reaction in ethanol/H2O mixed solutions. Methyltriethoxysilane (MTES) and dodecyltrimethoxysilane (DTMS) were used as precursors and sodium hydroxyl as the catalyst. FT-IR and XPS were utilized to characterize the structure of PDMSQ NPs. DLS, FE-SEM and TGA were applied to investigate its average particles size, micro-morphology and thermal stability. Results indicated that the carbon content was highly as 41.73% at the surface of PDMSQ NPs and signal at the binding energy of 103.04 eV was attributed to the characteristic signal of Si 2p from the PSQ. Hence, PDMSQ NPs had the nanosphere structure with Si-O bond as the skeleton and lots of dodecyl and methyl groups at its surface. While the weight loss of PDMSQ NPs was 5% and the corresponding temperature was 351 ℃, this demonstrate that thermal stability of the PDMSQ NPs was excellent. When the molar ratio of MTES to DTMS was amongst 10∶1.0~10∶1.4 and the reaction temperature was 60 ℃, the obtained PDMSQ NPs had the smooth surface with the regularly sperical and monodispersed patterns by the FE-SEM observation. Water contact angle on its surface attained 168° and finally the formation mechanism was also proposed.

Abstract:Abstract:The Acrylate polymer/alkyd resin hybrid emulsion (WPAARSi) was prepared by solution phase inversion polymerization using the dimethylaminoethyl methacrylate (DM), methyl methacrylate (MMA), butyl acrylate (BA), γ-methacryloxypropyltrimethoxysilane (KH-570) as modified monomers, azobisisobutyronitrile (AIBN) as initiator, ropylene glycol methyl ether (PM) as cosolvent and acetic acid (Ac) as neutralizer. The effects of monomer dropping time, polymerization temperature, monomer ratio of acrylate monomers and amount of alkyd resin (BTS-SZ) on the gloss and water resistance of WPAARSi coating were investigated. The structure and properties of the polymer were characterized by FT-IR, TEM, GPC, TGA, rheological analyzer and mirror to gloss meter. The results showed that when the dropping time was 2 h, the polymerization temperature was 85 ℃, m（DM）=6%，m（MMA）∶m（BA）=18∶2，m（BTS-SZ）=55%，m（KH-570）=0.62%，m（AIBN）=1.62%, the gloss of the coating was 116% and the water absorption was 2.8%. TEM test showed that the latex particles presented the core-shell structure. GPC test showed that the mass average molecular weight of the modified alkyd resin increased from 1413 to 2945, the weight average molecular weight increased from 5152 to 19853, and the relative molecular mass distribution became wide. TGA tests showed that the thermal stability of the modified alkyd resin was improved. Analysis of emulsion rheological behavior indicated that the emulsion presented good thixotropy.

Abstract:Ce-MCM-41 mesoporous molecular sieve with different silicon to cerium ratio(Si/Ce) was synthesized by hydrothermal method. and then the cerium oxide was obtained through disso lving the MCM-41 template with NaOH solution. Structure characterization by X-ray diffraction, transmission electron microscopy(TEM), Scanning electron microscopy (SEM) and N2 adsorption –desorption. The results indicated that when n（ Si/Ce）=1.0:1.0, The nano fibers diameter 4nm, Fiber length of about 500 nm, with a high surface area of 528.0 m2.g-1 , We demonstrated the high catalytic efficiency of CeO2 nanofibers as catalyst in the oxidation of methyl violet dye with H2O2 . The decoloration rate of 40 mg /L methyl violet solution reached 80.0 % with in 45min .

Abstract:The pectin/AMP-Zn microsphere was prepared by embedding ammonium phosphomolybdate (AMP) in pectin by electrostatic-injecting device using gel-sol method and Zn2+ as crosslinking agent, which was used in the removal of Cs+ in radioactive waste water. The effects on adsorption cesium were systematically investigated, including pH, dosage, contact time, initial concentration of Cs+, temperature and coexisting ions. The adsorption mechanism was analyzed by means of SEM, FTIR and XPS. Furthermore, the results showed that the pectin/AMP-Zn microspheres could be applied in a range of pH=3~11. Therefore, the adsorbent had good acid and alkali resistance. The adsorption capacity of adsorbent was 41.837 mg/g under the condition of pH=5, initial mass concentration of 120 mg/L and adsorption dose of 0.05 g. The presence of competing ions (K+, Na+, Li+, Ca2+ and Mg2+) had no effect on the cesium adsorption, which indicated pectin/AMP-Zn microspheres had high selectivity. Thermodynamic and kinetic studies exhibited that it was fitted well with Freundlich model and pseudo-second-order kinetic model, respectively. Besides, the process that the adsorption of cesium onto pectin/AMP-Zn microspheres was a spontaneous exothermic process. In addition, above-mentioned characterization methods confirmed that the adsorption mechanism was ion exchange reaction between NH4+ and Cs+.

Abstract:A novel anionic polyelectrolyte poly(4-styrenesulfonic acid-co-maleic acid) sodium (PSSMA) decorated magnetic graphene oxide (MGO@PSSMA) was prepared by a simple and facile one-step solvothermal method in this paper, and used for the removal of heavy metal lead (Pb(II)) and copper ions (Cu(II)) from aqueous solution. The prepared MGO@PSSMA was characterized by FTIR, SEM, TEM, VSM and DLS. Batch adsorption studies were performed to investigate the effects of solution pH, adsorption time and initial solution concentration on the adsorption of Pb(II) and Cu(II) onto MGO@PSSMA and MGO without modifying with PSSMA, and the adsorption isotherms, kinetics and mechanism were also studied. The obtained results show that the introduction of PSSMA onto MGO can dramatically enhance the adsorption of Pb(II) and Cu(II) onto MGO@PSSMA, the adsorption capacities are changed from 24.9 mg/g to 141.1 mg/g for Pb(II) and from 22.8 mg/g to 104.8 mg/g for Cu(II), respectively. Moreover, the adsorption of Pb(II) and Cu(II) onto MGO@PSSMA and MGO fits pseudo-second-order kinetic and Langmuir model well, respectively. In addition, the used MGO@PSSMA can be effectively regenerated with ethylenediaminetetraacetic acid (EDTA) and hydrochloric acid (HCI), and recovered from Pb(II) and Cu(II) aqueous solution under an external magnetic field.

Abstract:Synthesis of Schiff base intermediates using salicylaldehyde and diethylenetriamine as starting materials. After that, the Schiff base intermediate was supposed to react with formaldehyde and acetone, which would synthesize Mannich base (ISMB) corrosion inhibitor containing the imine by Mannich reaction. The structure of the product was determined by FTIR and 1H-NMR spectroscopic methods. The corrosion inhibition performance of N80 steel sheet in mass fraction of 3% saline water saturated by CO2 was investigated by static weight loss method and electrochemical methods. The corrosion inhibitor was also evaluated by thermogravimetric analysis (TGA) to investigate its resistance to high temperature. The adsorption behavior and corrosion morphology of the inhibitor molecules on carbon steel surface were investigated. The inhibition mechanism of ISMB was calculated by quantum chemistry. The resoults show that, at 70℃, when the dosage of corrosion inhibitor reached 500 mg/L and the corrosion time was 72h, the inhibition rate of the corrosion inhibitor is 90.4%. The inhibitor had an excellent thermal stability in below 220℃, ISMB can be spontaneously adsorbed on the surface of steel sheet, and the adsorption type is a chemical adsorption based mixed adsorption. The corrosion morphology of N80 steel sheet surface was observed by atomic force microscopy (AFM). The results showed that the corrosion inhibition performance of corrosion inhibitor was quite satisfactory. Finally, the global reactivity parameters were obtained by quantum chemistry. The results showed that the energy gap of ISMB molecules was low, and the reactive region was mainly concentrated on benzene ring, nitrogen atom and oxygen atom.

Abstract:A series of SnO2-doped (1%-7%,molar fraction)SO42-/TiO2-SnO2 catalysts were prepared by a method of co-precipitation and impregnation.The structures and properties of these catalysts were characterized by N2-adsorption and desorption、FT-IR、XPS、NH3-TPD.The result showed that the specific surface area and pore structure of catalyst were improved,coordination structure with SO42- were formed easily and the amount of acid center on surface were increased observably by doping SnO2. The activity of the catalyst was enhanced caused by these factors.The conversion of camphene was 77.3% and the selectivity of isobornyl acrylate was 98.4% in Esterification reaction of crylic acid with camphene catalyzed by SO42-/TiO2-SnO2 solid acid catalyst doped with 5% molar fraction of SnO2. Compared with SO42-/TiO2, SO42-/TiO2-SnO2 exhibited higher activity and stability.

Abstract:Isobornyl methacrylate (IBOMA) was synthesized by microwave irradiation using camphene and methacrylic acid as raw materials. The reaction conditions were optimized by Design Expert 8.0, based on the single factor experiments of the reaction time, microwave temperature, microwave power, molar ratio of camphene and methacrylic acid and catalyst dose. These variables were optimized by Central Composite experimental design in combination with response surface analysis . The results showed that the optimal conditions were as follows : reaction temperature 43℃ , n(camphene)/n(Methacrylic acid)=1:0.8 , catalyst dose 10% , irradiation time 25min and microwave power 400W . Under the optimal conditions,the esterification rate can reach 82.23% .

Abstract:A series of waterborne polyurethane prepolymer were prepared by sophorone diisocyanate (IPDI) and polycaprolactone glycol (PCL1000) as the main raw materials, dimethylol propionic acid (DMPA) as hydrophilic chain extender. The waterborne polyurethane (SWPU) with fluorescence was obtained by 4,4'-Diaminodiphenylethylene-2,2'-disulfonic acid (DSD acid) as chain extender. Structure and properties of polymer were characterized by FT-IR, DLS, XRD, UV-Vis, Fluorescence spectra, Tensile testing and TGA&DTG. FTIR, DLS analysis showed that DSD acid had been introduced into the molecular chain of SWPU, with the increase of the mass fraction of DSD acid, the particle size of emulsion decreases firstly and then increases. When w (DSD acid) =2%, the particle size of SWPU emulsion was 72.80 nm. The results of XRD, UV-vis and fluorescence spectra showed that SWPU had obvious crystallinity, SWPU had certain ultraviolet absorption and red shift, SWPU emit strong blue fluorescence and concentration quenching. Compared with the WPU, the thermal stability of SWPU latex film the tensile strength and the maximum decomposition temperature had improved obviously. When w (DSD acid) =3%, the maximum tensile strength was 48.43 Mpa and the elongation at break was 366.42%, the maximum decomposition temperature from 301.48 ℃ to 328.05 ℃.

Abstract:The blend emulsions were mixed with the similar particle size emulsions of fluorinated acrylate emulsion and acrylate emulsions at 1:1 mass ratio. The blend films were prepared on PTFE plate at 15℃、30℃、45℃、60℃, respectively. The effects of film forming temperature on the self-organized gradient structure and surface properties of blend films were studied by FI-IR、PSA、CA、surface free energy analysis、SEM、SEM-EDX、XPS and mechanical properties. The results showed that the blend emulsions’ particles sizes reduced, at the same time the particles distribution of blend emulsions widened. The fluorine content of the F-P film surface was higher than that of the F-A film surface when the film forming temperature was beyond 45℃, and the fluorinated acrylate polymer components were enriched in the F-P film surface, while the acrylate polymer components were enriched in the F-A film surface. The surface property of the F-P film surface of blend film was similar to the pure fluorinated acrylate polymer. The concentration gradient of fluorine component was reduced from the F-P film surface to the F-A film surface, and the gradient structure and two sides of the blend film were more obvious.With the increase of temperature, the tensile strength of latex film increased significantly.

Abstract:V2O5/Graphene composite material was prepared by a facile sol-gel method. The microstructure of the prepared sample was characterized by SEM, XRD, Raman spectroscope, and TGA. V2O5/Graphene // Li4Ti5O12 full-cell was assembled using the V2O5/Graphene composite and Li4Ti5O12 as cathode active material and anode active material, respectively. The results demonstrated that the V2O5/Graphene composite contained 0.55% graphene and had a two-dimensional sheet-like morphology with orthorhombic phase structure. Electrochemical characterizations revealed that the V2O5/Graphene composite exhibited higher lithium storage activity and better high rate capability than the pure V2O5 counterpart. At a current density of 200 mA/g, the V2O5/Graphene composite delivered a discharge capacity of 283 mAh/g, while that for the pure V2O5 was only 253 mAh/g; at a high current density of 5 A/g, the V2O5/Graphene showed a discharge capacity of 150 mAh/g, whereas that for the pure V2O5 was only 114 mAh/g. The charge transfer resistance of the V2O5/Graphene composite was142 Ω, which is much lower than that (293.3 Ω) of the pure V2O5 counterpart. In a voltage range of 1.0 V~2.5 V, the V2O5/Graphene // Li4Ti5O12 full-cell initially show a capacity decrease from 110 mAh/g to 96 mAh/g, then the capacity increases slowly and stabilized about 102 mAh/g in the 100th cycle; the coulomb efficiency during charge/discharge cycles is closed to 100%, suggesting the V2O5/Graphene composite is a promising cathode material for lithium-ion batteries.

Abstract:In this paper, the all-solid-state with high ionic conductivity electrolyte Li1.4Al0.4Ti1.6(PO3)4 (LATP) used for lithium-oxygen battery. The LATP has been successfully synthesized by Pechini-type method and characterized by X-ray powder diffraction analysis (XRD), field emission scanning electron microscopy (FESEM) and electrochemical performance. Through the analysis of electrochemical performance, LATP not only has high ionic conductivity, but also has a higher discharge platform as LATP solid electrolyte. At the same time, LATP solid electrolyte can reduce the decomposition of electrolyte, thereby reducing the generation of discharge products. Moreover, LATP solid electrolyte reduces the decomposition of the electrolyte, and thus reduces the formation of undesired discharge products. Therefore, the use of LATP glass ceramics for lithium Oxygen Batteries improves the thermal stability of lithium oxygen batteries and reduces the thermal expansion of lithium oxygen batteries. Therefore, LATP glass ceramic solid is used by lithium oxygen battery to improve the thermal stability of lithium oxygen battery and reduce the thermal expansion of lithium oxygen battery. The LATP solid electrolyte has a good prospect in the rechargeable lithium-oxygen battery.

Abstract:Yak skin was utilized to prepare the acid-soluble collagen (ASC) and pepsin-soluble collagen (PSC), whose structure and property had been analyzed. The results showed that the extraction rates of ASC and PSC were (54±0.18)% and (78±0.42)%, respectively. The results of ultraviolet absorption spectrum analysis, infrared absorption spectrum analysis and electrophoresis analysis showed that both ASC and PSC had a complete three strand helical structure, which conformed to the structural characteristics of I type collagen. Amino acid analysis indicated that ASC and PSC were rich in imidates at 264.1 residues/1000 residues and 276.6 residues/1000 residues. The thermal stability of ASC and PSC was 41.5 ℃, 47.5 ℃, and the heat shrinkage temperature was 62.5 ℃, 70 ℃. The thermal stability of PSC was higher than that of ASC. ASC and PSC were observed by scanning electron microscopy (SEM) to determin the loose and irregular morphology. Self-assembly experiment illustrated that both ASC and PSC performed the fiber forming ability. Self-assembly experiments showed that PSC and ASC have certain fiber-forming ability, and the D-periodicity of self-assembled products was (68.2±5) nm nm and (69.3±3) nm, respectively, and PSC was assembly faster than ASC.

Abstract:The waterborne polyurethane modified by amino silicone oil(Si-WPU) emulsion was prepared by amino silicone oil(ASO), polycaprolactone glycol(PCL) and isophorone diisocyanate (IPDI) as the main raw materials, 2,2-bis(hydroxymethyl)propionic acid(DMPA), 1,4- butanediol (BDO) as chain extender, hydrazine hydrate as post chain extender. Fourier transform infrared spectroscopy(FTIR), contact angle measuring instrument, transmission microscopy(TEM), thermal gravimetric analyzer(TGA) and nano particle surface potential analyzer confirmed the chemical structure, hydrophobicity, particle morphology, thermal properties of Si-WPU film and particle size of Si-WPU emulsion.The effects of ASO adding amount, isocyanate index(R, the molar ratio of NCO and active groups in the prepolymer synthesis process) on the mechanical properties and glossiness of Si-WPU film was investigated. The results show that the mechanical properties of Si-WPU film reach the maximum of 25.9MPa when the adding amount of ASO is 15% based on the quality of PCL and R value is 1.6. With the increase of ASO adding amount, When R=1.6, the particle size of Si-WPU emulsion increased gradually from 35.7nm to 134.3nm, the mechanical properties and glossiness of Si-WPU film were decreased. The thermal decomposition temperature begins to decompose at about 186.2℃, and decomposes completely at 428.4℃, the residue weight increased with the increase of ASO adding amount, the contact angle between Si-WPU film and water increased gradually from 81.8。when the adding amount of ASO is 0 to 107。when the adding amount of ASO is 15%, and hydrophobicity of the Si-WPU film was enhanced..

Abstract:Modified graphene oxide(GSGO) was prepared by intercalation of graphene oxide(GO) via Gemini surfactants(GS), then composites of GSGO/PANI were prepared by in situ polymerization method using aniline(An) and GSGO as raw materials,ammonium persulfate (APS) as initiator.Finally, the GSGO/PANI/WAR anti-corrosion coating was obtained by blending with GSGO/PANI and WAR. The structure and morphology of GSGO and composites were characterized by FT-IR, Raman, XRD and SEM. The results showed that GS inserted into the GO ,the layers spacing of GSGO were increased and rod-like polyaniline dispersed in GO sheets, forming flaky intercalation structure.The Tafel polarization and electrochemical impedance spectrum test show that the GSGO/PANI/WAR composites coating had higher corrosion resistance than pure WAR coating. When the mass fraction of GSGO were 10 %, the corrosion resistance of coating is the best. The corrosion current density was decreased from 9.82 ? 10-6 A/ cm2 to 1.08 ? 10-6 A/ cm2, the corrosion potential was increased from -56V to -0.28V, | Z | values can reach 5.25 ? 106 ohm.cm2.

Abstract:On the basis of Fmoc solid-phase synthesis, by optimizing the degree of activation of amino acids on linear peptides and the selection of condensation reagents, the synthesis purity of linear peptide was increased to 86.3%, higher than that before optimization 28%, the separation and purification of linear peptide was omitted. For cyclic peptides with side chain protecting groups were separated by gel column instead of high performance liquid chromatography to reduce product loss and increase the total yield of cyclic peptide to 55.6%. Their structures were characterized by 1HNMR, 13CNMR and HRMS. The antimicrobial activity of Desotamide B synthesized by the above method was tested with vancomycin as the control. The results showed that the compound had a good inhibitory effect on Gram-positive bacteria, and the minimum inhibitory concentration was 16 μg / mL.

Abstract:Cd-modified labradorite (Cd/Lab) was used as a catalyst for pyrolysis of methane to obtain C2 hydrocarbons. The catalyst was characterized and tested by XRD, XPS, TEM and GC to analyse its structure, morphology and catalytic performance. The effects of metal doping, reaction temperature and feed gas spacevelocity on the catalytic pyrolysis of methane into C2 hydrocarbons were investigated by using a fixed bed reactor. At the feed gas spacevelocity of 1 L/h and the reaction temperature of 1073 K, the conversions of methane catalyzed by natural labradorite and mass fraction of 1% Cd/labradorite catalysts were 3.31% and 6.41%, respectively. Meanwhile, the selectivity of C2 hydrocarbons selectivity was more than 99%. The results that Cd2+ entered into the alkali metal sites in labradorite were demonstrated by XRD, XPS, TEM and catalytic performance of modified labradorite, confirming that the active site of labradorite was alkali metal site.

Abstract:By high-speed air flow circulation, a porous Mn-based metal-organic framework (Mn-BTC) was prepared from manganese acetate tetrahydrate and trimesic acid in the condition of the solid phase at low-temperature. The Mn-BTC was characterized by X-Ray diffraction (XRD) technique, IR spectroscopy (FTIR), thermogravimetric analysis (TG) and scanning electron microscopy (SEM). Moreover, an easy route for the synthesis of Mn2O3 by direct pyrolysis of Mn-BTC was also reported. The catalytic effect of Mn2O3 on the decomposition of AP was studied in detail. The results showed that the time for the synthesis of Mn-TBC by high-speed air flow could be reduced to 10 min, while the time for the diffusion in liquid phase was 24 h. In addition, the process of high-speed air flow method is easy to operate, low energy to cost, high efficiency to synthesize and also friendly to environment, which are benefit to this method to be industrialization. Compared to the product from the liquid phase diffusion’s precursor, the Mn2O3 prepared by the high-speed air flow method’s product, has better effect to catalyze the AP and can make the high thermal decomposition temperature (HTD) reduce by 158 ℃.

Abstract:A series of Co/CNT catalysts with different calcination temperature were prepared by the impregnation method to investigate the impact of different calcination temperature on the thermal stability, structure, phase, reduction degree and Fischer-Tropsch synthesis reaction activity. The catalyst characterization techniques include differential thermogravimetric analysis (TGA), nitrogen physisorption, X-ray diffraction (XRD), temperature program reduction (TPR), scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS). These characterization results show that carbon nanotube was stable below 500℃. When calcined at 250~500℃, surface area of the catalysts is in the range of 79.78~85.23 m2/g, pore volume in the range of 0.6~0.7 m3/g, and pore diameter in the range of 28.9~33.4 nm. The largest pore size is found when calcined at 350℃. When calcined at 350℃ the main phase of the catalyst is Co3O4 and CoO. The resulted crystallite size is relatively small, and crystallite size distribution is relatively narrow. TPR results and Fischer-Tropsch synthesis reaction data show that calcination at 350℃ lead to the lowest reduction temperature and highest CO conversion (12.5%).

Abstract:In this paper, CuO / Al-SBA-15 catalyst was prepared by supporting CuO on highly hydrothermal stable Al-SBA-15 mesoporous molecular sieve. The Fe-Al-SBA-15 catalyst was prepared by one-step synthesis method. XRD, TEM and FTIR were used for characterizations of the catalysts. The non-hydrodeoxygenation of methyl palmitate was carried out on Al-SBA-15, CuO / Al-SBA-15 or Fe-Al-SBA-15. The results showed that the metal oxides were uniformly dispersed on the surface of the mesoporous material, and CuO / Al-SBA-15 gave the best deoxygenation performance, the optimum reaction conditions were 342 ℃ and 2 h reaction time. Under optimum reaction conditions, the selectivity of decarboxylation of palmitic acid methyl ester are 40 ~ 60% higher than that of the non-catalytic reaction. The CuO / Al-SBA-15 catalyst was reused three times and the conversion of methyl palmitate revealed no significant reduction. According to the activity evaluation, it was deduced that the decarboxylation mechanism was as follows: Palmitic acid was produced by hydrolysis of methyl palmitate in the subcritical water, carboxylate was formed on the active center of the catalyst through next the C-C bond near the carboxyl group was attacked by activated hydrogen, and then CO2 desorpted and the main product pentadecane derived.

Abstract:In this paper, we took fractional steps to synthesize linear multidentate Schiff base amine ligand [N,N-bis(2-dihydroxyphenyl-amidoethyl)-2,6-pyridinedicarboxylic diamide (L)] firstly, then the 5 new transition metals complexes linked by Shiff base amine. The ligand and complexes are characterized by elemental analysis, IR, UV-VIS and IH NMR. And also the rational structures of them are speculated.The inhibitory activities of compounds on Escherichia coli were studied by micro- dilution. The results appear that Co and Zn complexes show good inhibitory effect on Escherichia coli.