Abstract:Aiming at improving the finishing effect and durability of feather keratin (FK) on polyester fabric, phytic acid (PA) was added to FK finishing solution in this paper. The morphology and structure of polyester fabrics before and after finishing were characterized by SEM and FTIR. Meanwhile, the influence of PA on the surface static contact angle, wicking height and antistatic property of the polyester fabrics finished by FK were comparatively analyzed. Besides, the retention rate of the FK on the fabrics after washing was also comparatively testd. The results show that compared with the polyester fabric finished only by FK, with the addition of the PA component, the adhesion amount of FK on the surface of the polyester fabric is increased, simultaneously the wicking height and antistatic property of the finished polyester fabric are improved, and the static contact angle of the surface is decreased. Also, the durability of the FK finished polyester fabric is enhanced by adding PA, and the higher FK retention rate is maintained after washing with the same process.

Abstract:The traditional methods of synthesizing gold nanoparticles include physical and chemical methods. Physical methods have limitations that will hinder their application in the field of biomedicine. Meanwhile, chemical methods have high operating costs. In order to overcome these shortcomings and achieve a sustainable route for the synthesis of gold nanoparticles, green synthesis has become a research hotspot in this field. The green synthesis method has been widely used in the synthesis of gold nanoparticles due to its extraordinary characteristics such as cost-effectiveness, simplicity, non-toxicity, and environmental friendliness. This paper takes gold nanoparticles as an example, briefly summarizes the advantages of green synthesis, and highlights the recent research progress on the green synthesis of gold nanoparticles with the utilization of natural reagents such as plant-derived materials, algae, fungi and their products, and bacteria and their products. Finally, the future challenges and application prospects of green synthesis of gold nanoparticles are proposed and prospected.

Abstract:Electrode materials are the principal factor, which of affecting electrochemical energy storage system performance, nowadays, research on the improvement of performances is focused on structural optimization and introduction of heteroatom. Carbon-based material, which is prepared by melamine resin as precursor, has excellent capacitive performance and recycle ability in the application of electrode materials of electrochemical energy storage, due to its ample open-framework structure and nitrogen atoms doping. This paper discusses the influence of porous structure on material performance from the porous control method such as activation method, template-carbonization method, and mixed polymer carbonization method. Meanwhile, this paper reviews the carbon-based material which prepared by melamine resin as precursor, and analyzes its research status and development trend for current battery and super capacitor.

Abstract:Aqueous zinc ion batteries have high application value and development prospects in large-scale energy storage and other fields. Manganese dioxide has the advantages of abundant reserves, low price, safety and environmental protection, and rich crystal structure. As a cathode material for aqueous zinc-ion batteries, it exhibits excellent electrochemical characteristics and has become the most concerned type of cathode material. However, during the charging and discharging process, the crystal form of manganese dioxide is changeable and accompanied by other surface reactions, the reaction mechanism is still controversial. In the past two years, with the successive reports of several important works, the electrochemical reaction mechanism has gradually become clear. This article focuses on the characteristics of the crystal structure of manganese dioxide and its performance as a cathode for aqueous zinc-ion batteries, combined with the latest research progress, and focuses on the energy storage mechanisms of different crystalline manganese dioxide, and prospects for its future development.

Abstract:As a new type of solar cells, Perovskite solar cells (PSCs) have attracted worldwide attention due to their rapidly improved photoelectric conversion efficiency in a short time. Hole transporting materials (HTM) is an important part of perovskite solar cells. Design and synthesis of low-cost, efficient and stable HTM play a great role in the development of PSCs. This review summarizes the molecular engineering of organic small molecule HTM based on linear Donor-Acceptor-Donor (D-A-D) configuration and their application in PSCs since 2009. Meanwhile, we highlight the effect of molecular structure on the power conversion efficiency (PCE) and device stability of PSCs. Based on above result, the feature research interest on D-A-D type HTM are presented.

Abstract:In recent years, the research of organic-inorganic hybrid membranes has received extensive attention from the academic community. With the diversification of organic-inorganic hybrid membrane preparation methods and the improvement of separation performance, its research prospects are becoming more and more broad. Firstly, this article analyzes the advantages of organic-inorganic hybrid membranes compared to ordinary inorganic membranes and organic membranes in terms of structure and performance. Secondly, it summarizes the preparation methods of organic-inorganic hybrid membranes and their use in alcohols, organic acids, etc. For separation and purification applications in organic solvents or organic mixtures, the focus will be on its application in pervaporation. Finally, the research prospects of organic-inorganic hybrid membranes are prospected. Future research on organic-inorganic hybrid membranes should rely on new computational tools, focusing on material selection or improvement of preparation methods, such as exploring polymer materials with multifunctional chemical groups and porous fillers with clear hierarchical structures. The organic-inorganic hybrid membrane has a broader application prospect.

Abstract:ZnO was modified with sodium stearate by surface wet modification. Then, the nano-ZnO dispersion slurry was prepared by mechanical grinding, using cyclopentadecane silicone oil as solvents and PEG-10 polydimethylsiloxane as dispersants. The powder were characterized by water contact angle, TG, TEM and FTIR test, respectively. The result showed that the powder has hydrophobicity after sodium stearate modified. The coating thickness was about 2 nm and the maximum water contact angle was 145.4° when the amount of sodium stearate was 6%. In the sunscreen performance test of simulated sunscreen emulsion, the UV shielding performance of nano-ZnO dispersion powder was significantly better than that of powder. The rheological study showed that the dispersion slurry was a pseudoplastic fluid, which conformed to the Ostwald-de Wale power law equation, and had shear thinning characteristics. The viscosity of the dispersed slurry was low, the thixotropy was small, and the storage stability was high; when the temperature was increased, the viscosity of the slurry was reduced and the sensitivity to temperature in formula production was lower.

Abstract:The Ag3PO4/g-C3N4 composites were prepared by in-situ precipitation method and characterized by XRD, SEM, TEM, UV-Vis-DRS and PL. The results showed that g-C3N4 exhibited a graphite-like and flake-like structure, while Ag3PO4 indicated a spherical-like structure with cubic crystal phase, which were evenly distributed on the surface of g-C3N4. By using methylene blue (MB) as a simulated pollutant, the effect of different molar ratios of g-C3N4/Ag3PO4 on the photdegradation rate were studied. The results showed that when the molar ratio was 1:0.7, the photocatalytic activity was the best, and the MB degradation rate could reach 100% after 30 min of visible light irradiation. The photocatalyst indicated high stability, as the degradation rate retained 85.24% after repeated use of the same photocatalyst for 5 times. The mechanism of degradation research shows that h and e- are the main active substances in photdegrading MB.

Abstract:The isophorone diisocyanate trimer (FIPDIT) grafted with organic fluorine was synthesized by melt polycondensation of 2,2,3,3,3,3-tetrafluoro-1-propanol (PFIP) and isophorone diisocyanate trimer (IPDIT). The graft of silicone-containing waterborne polyurethane (FSWPU) with organic fluorine was prepared from isophorone diisocyanate (IPDI), polyether diol (N210), hydroxyl polydimethylsiloxane (PDMS), 1,4-butanediol (BDO), 2,2-dihydroxymethyl propionic acid (DMPA) and different dosage of F-IPDIT. the FSWPU structure and properties were characterized by FTIR、TGA、 water contact angle, stretching and solvent resistance. The results show that the emulsion is stable, Under n (N210): n (PDMS)=8∶1, And when the FIPDIT is 5%, Average particle size 168 nm, Water absorption is 8.1%, Contact angle 113.5°, 23.1 Mpa, tensile strength, The elongation at break is 328%, the temperature of 10%,30% and 50% of the thermogravimetric weight loss was 302、329、350℃, respectivel. The water resistance, solvent resistance, et al, are obviously improved.

Abstract:Abstract: A multifunctional double-loaded core–shell hydrogel was developed for the stepwise degradation of organic pollutants using microorganisms and photocatalysts. The hydrogel core was coated with polyvinyl alcohol (PVA) and hydroxyethylcellulose (HEC) coated with yeast (YE) and the shell consisted of sodium alginate (SA) and calcium ions (Ca2+) loaded with titanium dioxide nanoparticles (TiO2 NPs). Scanning electron microscopy measurements revealed that the core–shell structure was clear and distinct, while the micrographs and fluorescent labeling photos proved the existence of YE in the core. The successful loading of TiO2 NPs in the shell was confirmed by X-ray diffraction analysis, while Fourier transform infrared and X-ray photoelectron spectroscopic recordings verified the development of intermolecular interactions in the core–shell structure. The applicability of the developed core–shell hydrogel was examined in the stepwise degradation of methylene blue (MB) dye using different YE and TiO2 NPs loadings. High TiO2 NPs shell loadings promoted the degradation of MB, which could reach 96.65%, whereas the MB degradation rate first increased and then decreased to 92.15% with increasing YE loadings. After 4 cycles of degradation, the degradation rate of MB dye still be 68.97%.The successful results of this study are expected to serve as a guide for the development of new degradation methods for the removal of various organic pollutants.

Abstract:WO3/C/Ag3PO4 composites were prepared by coprecipitation method with the basic materials of prepared activated carbon, WO3, AgNO3, Na2HPO4. The samples were characterized by XRD, FT-IR, XPS, SEM, TEM and UV-DRS techniques. The results showed that a heterojunction was formed between Ag3PO4 and WO3. The photocatalytic properties of WO3/C/Ag3PO4 composites were evaluated by using bisphenol A (BPA) to simulate pollutant under visible light irradiation, and the photodegradation mechanism of WO3/C/Ag3PO4 composite was proposed. The results shown that among a series of photocatalysts, the degradation rate of BPA in aqueous solution by 23% WO3/7%C/ Ag3PO4 composite reached 95% in 90 min under visible light, which was significantly higher than that of single Ag3PO4 and WO3. After three cycles of reuse, the degradation rate of BPA remained at 74%, indicating the good stability of WO3/C/Ag3PO4 photocatalyst. The research on photocatalytic mechanism indicated that the radicals of ?O- 2 and h play major roles in the degradation process.

Abstract:Waterborne polyurethane(WPU) was prepared by using 2,4-dihydroxybenzaldehyde (DDBA) as the chain extender and hydroxyethyl acrylate (HEA) as the blocking agent. The polyurethane-CMCh Schiffbase was synthesized by the carboxymethylated chitosan (CMCh) under mild conditions. Then the polyurethane-carboxymethyl chitosan Schiff base (DPU-Ch) hydrogel was synthesized by free radical polymerization. The structure and properties of hydrogels were characterized by FTIR, SEM, mechanical properties, swelling water retention test, antibacterial test and blood compatibility test. The results show that the mechanical properties of the hydrogel increase with the increase of the CMCh mass fraction. At the same time, the hydrogel also shows good swelling ability and proper water retention capacity. When the amount of CMCh added is 2%, the hydrogel shows good antibacterial properties against E. coli and S.aureus; The hemolysis rate of the hydrogel is lower than 5%, indicating that it has good cell compatibility, and the survival rate of NIH3T3 cells above 90% proves that it is not cytotoxic, so It has potential application prospects in the field of biomedicine.

Abstract:Photothermal phase change microcapsules (n-OD@SiO2/PDA) were successfully prepared using n-octadecane (n-OD) as core material, silica (SiO2) and polydopamine (PDA) as composite wall materials. FESEM, FETEM, FTIR, DSC, TG, UV-Vis-NIR and simulated light source were used to characterize the surface morphology, chemical structure, thermal properties, optical absorption and photothermal properties of the microcapsules. The effect of different mass ratios of core material to silicon source (tetraethyl orthosilicate, TEOS) on the thermal storage performance of phase change microcapsules was investigated. The optimal mass ratio of n-OD to TEOS was 2:1. The results showed that the prepared photo thermal phase change microcapsules had regular surface morphology and obvious core-shell structure with good heat resistance, and the composite wall material could effectively protect the core material. Compared with the phase change microcapsules n-OD@SiO2, n-OD@SiO2/PDA had good heat storage performance with a melting enthalpy of 151.2 J/g, and exhibited excellent photothermal conversion performance with 91.8% of solar thermal conversion and storage efficiency.

Abstract:Cellulose acetate@chitosan modified montmorillonite composite nanofibers were fabricated by electrospinning and solution intercalation (CA@CS-MMT). And the adsorption properties of CA@CS-MMT nanofibers for Cr (Ⅲ) in wastewater were studied. Firstly, the CS-MMT composite was prepared by intercalation modification of MMT with CS, and the interlayer spacing of modified CS-MMT was significantly increased from 1.2450 nm to 2.2198 nm. Then CA@CS-MMT composite nanofibers were prepared by solution blending electrospinning. The structure and properties of the composite nanofibers were studied by SEM, FTIR, XRD and TGA etc. The results showed that the average diameter of nanofibers decreased with the increase of CS-MMT content. And the thermal stability and wettability of nanofibers were improved. When the content of CS-MMT is 2 wt%, the lamellar structure of CS-MMT is assembled with CA to form a continuous structure in the nanofiber. The adsorption capacity of the composite nanofibers was 144.93 mg/g when pH was 5.5 ? 0.1 at 25 ℃. The adsorption process was in accordance with Langmuir isothermal adsorption and pseudo second order kinetics. The adsorption capacity was still 95.0 mg/g after three times of desorption.

Abstract:A semicarbazide derivative R has been synthesized using 3-propyl isocyanate triethoxysilane and 2, 4-Dinitrophenylhydrazine as raw material and characterized by 1H/13C NMR and other methods. The receptor R exhibited excellent recognition capability for F-, Ac- and CN- by obvious changes of UV-Vis spectral and solution color in DMSO solution. In addition, The single recognition effect of the receptor R on CN- can be achieved by adding 30% of the competitive solvent H2O to the DMSO system. According to the Benesi-Hidebrand equation, receptor R recognized CN- with a complex constant of 8.58 ? 103 L/mol and a detection limit of 1.47 uM, and form a 1 : 1 hydrogen bond complex with anions by Job curve. The recognition mechanism of receptor R and anion using hydrogen bonding was explained through 1H NMR titration and theoretical calculation, and no deprotonation behavior was found.

Abstract:This article uses NPGDMA as the monomer, and uses light curing technology to polymerize the monomer to form a polymer into a 3D network structure. This structure can effectively wrap the ODE to solve the leakage of octadecane. By using high thermal conductivity BN as a thermally conductive filler, an ODE/NPGDMA/BN composite PCM with good thermal conductivity and shape stability was successfully prepared. When the mass ratio of ODE and NPGDMA was 1:1, it had a lower leakage rate and a larger latent heat. Therefore, a formula with an ODE content of 50% was selected for subsequent experiments. The structure, morphology and element distribution state were characterized by FTIR, XRD, SEM and EDS. The hot stage test showed that the prepared composite PCM had no shape change when it is higher than the ODE phase transition temperature (28 ℃), indicating that it has good shape stability; through TGA test, it can be seen that there was no weight loss before 100 ℃, indicated that the composite PCM had good thermal stability; The DSC test showed that the ODE/NPGDMA/BN composite PCM had a large latent heat (103.9 J/g). When the content of BN in the composite PCM was 5%, its thermal conductivity was increased by about 49.6% compared with pure ODE.

Abstract:Granular; Anode material; NiMoO4; Solvothermal method

Abstract:A series of WO3/Nb2O5 was prepared by impregnation method. The structure, components, morphology, acidic property, specific surface area and porosity of the catalysts were fully characterized by XRD, EDS, TEM, NH3-TPD, Py-IR, BET, BJH. And its catalytic properties in conversion of fructose to 5-hydroxymethylfurfural (HMF) are studied. The factors such as tungsten oxide loading amount, reaction time, temperature and amount of catalyst are investigated. It is found the tungsten oxide loading amount plays important role on the structure, acidic property and catalytic properties of the catalysts. With the increase of tungsten loading amount, the molecular structure of tungsten oxide changes from the surface dispersed amorphous WO3 to the crystalline WO3, and the presence of appropriate amount of WO3 clusters on Nb2O5 leads to generation of maximum number strong acidic sites and additional number of Brønsted acid sites in the catalyst, thereby increasing the conversion of fructose. However, the crystalline WO3 is not conducive to the production of HMF. The selectivity and yield of HMF can respectively reach 85.4% and 49.6% within 1 h at 170 ℃ over 100 mg 5%-WO3/Nb2O5 catalyst．

Abstract:C-doped porous spherical TiO2 was prepared by modified sol-gel method and hydrothermal method. Then, it was used as support to fabricate RuAg/TiO2-C catalyst for methanol oxidation. The structural and electrochemical properties of the RuAg/TiO2-C catalyst were characterized by XRD, TEM, EDS, XPS and electrochemical analysis. The experiment results showed that the deposition of RuAg and doping of C could improve the electrocatalytic activity of the RuAg/TiO2-C catalyst for methanol oxidation. The cyclic voltammograms of the RuAg/TiO2-C catalyst showed that there was a larger methanol oxidation peak current at 0.544 V with a peak current density of 5.8 mA/cm2. No oxidation peak of intermediates can be seen on the reverse scan in the cyclic voltammograms. The RuAg/TiO2-C catalyst showed higher catalytic activity and better anti-poisoning ability for methanol oxidation than the commercial PtRu/C catalyst. The enhancement was owing to the strong interaction between RuAg nano alloy and TiO2-C support.

Abstract:To reduce costs and environmental pollution, the alginate derivatives (Ugi-Alg) that can be applied in the field of pharmaceutical formulations were synthesized by the Ugi four-component condensation reaction using the p-tolylsulfonylmethyl isocyanide to replace cyclohexyl isonitrile and n-propionaldehyde to re-place formaldehyde, based on previous explorations of Ugi reaction for the modification of alginate. The molecular structure of Ugi-Alg were characterized by means of FT-IR and 1H NMR, and their properties were determined by TGA, XRD, fluorescence spectrum (FM), surface tension (SFT), TEM, laser particle size and zeta potential analyzers. Experimental results showed that Ugi-Alg-1 and Ugi-Alg-2 were success-fully prepared by Ugi reaction. The grafting of hydrophobic side groups broke the intramolecular hydrogen bonds of the raw SA, changing its microcrystalline structure, decreasing thermal stability, and enhancing the flexibility of the molecular chain. Moreover, the molecular chains of Ugi-Alg-1 and Ugi-Alg-2 could curl freely through hydrophobic association to form the micellar aggregates with the hydrodynamic parti-cle diameters (dH) of 659.4 nm and 534.6 nm, and Zeta potentials of -54.6 mV and-60.8 mV, respectively。These results indicated that both Ugi-Alg-1 and Ugi-Alg-2 has good colloidal interfacial activity. In addi-tion, the hydrophobic lumen of Ugi-Alg-1 and Ugi-Alg-2 can effectively solubilize the hydrophobic ibu-profen, retard the diffusion of the drug, and slow down the drug release rate. The release process of ibu-profen from Ugi-Alg drug-loaded microcapsules conformed to the Non-Fickian diffusion mechanism, in-dicating that the swelling and degradation of Ugi-Alg microcapsules and the diffusion of the loaded drug jointly controlled the release rate of ibuprofen.

Abstract:Kilogram scale teneligliptin hydrobromide, a DPP-4 inhibitor, was synthesized by amination reduction, de-protection, salt formation, and crystallization using (2S)-4-oxo-2-(3-thiazolidinylcarbonyl)-1-pyrrolidinecarboxylicacid tert-butyl ester (Ⅱ) and 1-(3-methyl-1-phenyl-1H-pyrazole-5-yl) piprazine (Ⅲ) as raw materials, sodium triacetoxyborohydride as reducing agent and only toluene as solvent. The structure and properties of the product were characterized by FTIR, LC-MS, XRD, 1HNMR and polarimeter. The optimum synthetic conditions of amination reduction, de-protection and salt formation were as follows: n(Ⅱ)∶n(Ⅲ)∶n(V)=1.0∶1.0∶1.5, and reaction time 2~3 h. Under these conditions, the purity of obtained the product 3-({(2S,4S)-1-tert-butoxycarbonyl-4-[4-(3-methyl-1-phenyl-1H-pyrazol-5-yl)-1-piperazinyl]-2-pyrrolidinyl}formyl) thiazolidine (Ⅳ) with the of 98.40%; n(Ⅱ)∶n(Ⅲ)∶n(HBr)=1.0∶1.0∶3.5, reaction time 4 h and crystallized at 0~5 ℃ with the total yield of 88.33% and the purity of 99.95%, []20D=-32.5°.

Abstract:In order to find new anti-tumor drugs from natural resources, six of new isopimaric thiophene sulfonamides derivatives (5a~5f) were designed and synthesized. And the structure of the compounds was confirmed. In addition, the cell proliferation inhibition assay (MTT method) was used to study the in vitro inhibitory activity of 5a~5f on four human tumor cells. The results showed that some compounds had good inhibitory activities against four kinds of human tumor cells; at the concentration of 100 μg?mL-1, isopimaric acid acyl- 2-chloropyridine-5-sulfonamide(5d) and isopimaric acid acyl- 3-bromo-2-chloropyridine-5-sulfonamide(5e) exhibited favorable ntitumor activities against cervical cancer (Hela), breast cancer cells (MDA-MB-231), prostate cancer (PC-3) and hepatocarcinoma cells (HepG-2) respectively, which was all over 95% and 90%; Isopimaric acid acyl- 3-chloroquinoline-sulfonamide(5c) has a good inhibitory activity on the above four human tumor cells. The IC50 values of compounds 5d and 5e were lower than those of 5-fluorouracil (5-FU), which was widely used in clinic. It indicated that compounds 5d and 5e had good clinical application prospects.

Abstract:This study prepared zinc-aluminum hydrotalcite (ZnAl-LDH) by co-precipitation method. The structure was characterized by x-ray diffractometer, fourier infrared spectrometer and scanning electron microscope. The results showed that: ZnAl-LDH is a flake material with size between 100 nm~400 nm. In this paper, ZnAl-LDH with 2% chrome tanning agent was used in leather tanning process. The effects of ZnAl-LDH metal ion ratio and aging time on shrinkage temperature and chromium content in waste liquor were investigated. The application results show that when the molar ratio of Zn2 to Al3 is 2:1 and the aging time is 6h, the Ts of leather could be increased from 74.2 ℃ to 94.1 ℃, and the chromium content in the waste liquor can be reduced from 93.64 mg / L to 46.98 mg / L, the BOD5/CODCr of the waste liquor could be significantly reduced when ZnAl LDH was added.

Abstract:In this study, the performance of lead extraction by dithizone-ionic liquid 1-butyl-3-methylimidazole hexafluorophosphate ([Bmim][PF6]) was researched. Both the extraction and stripping conditions and efficiencies of separating lead ions from water were investigated, respectively. The influences of extraction temperature, complexing agent content, pH value of the liquid phase, the volume ratio of the extraction system to the water phase as well as interference ions on the extraction efficiency were studied. In addition, on the prerequisite of the optimal extraction rate, the screening of the stripping agent was carried out. Furthermore, the influences of the stripping concentration and operating temperature on the stripping efficiency were investigated, and finally, the best stripping conditions were obtained. The research results showed that at the extraction conditions of 35 ℃, pH 6, complexing agent dithizone content of 0.5% (w/v), extraction system and water phase volume ratio of 1/4, the extraction rate of lead ions from water is as high as 98.0 %. In this system, the addition of interference ions has less effect on the extraction rate of Pb2+, and it can be used for the extraction and separation of various metal ions in wastewater. At 35 ℃, using 1mol/L HNO3 as the stripping solution, the above-mentioned loaded extraction system was effectively extracted to a rate of 97.0 %. Finally, the mass transfer efficiencies of the multiple extraction/stripping were investigated. The results showed that the extraction rate of the system still reached 80.0 % after three times of extractions, and the stripping rate was 65.0 %

Abstract:Carrageenan (KC) was grafted onto aluminum tripolyphosphate (ATP) to achieve new modified filler (KC-ATP), and then KC-ATP was added into waterborne epoxy (WEP) to prepare anticorrosive composite coatings. The morphology and structure of ATP before and after modification were characterized by FTIR, XPS, TG and SEM. The results showed that KC was successfully grafted onto the surface of ATP, which improved the water solubility of ATP. The corrosion resistance of the composite coatings was investigated via electrochemical impedance spectroscopy (EIS) and salt spray test. The results revealed that the anticorrosive property of composite coatings was obviously superior to that of neat waterborne epoxy coating, and the corrosion resistance of composite coating was best when adding 1.0% (based on the quality of waterborne epoxy resin, the same below) KC-ATP functional pigment. The polarization resistance Rp of the coating after being immersed for 48 hours is 8.183×107 Ω∙cm2, which is much higher than those of ATP modified composite and pure epoxy coatings.

Abstract:Castor oil-methyl methacrylate copolymer was synthesized from castor oil(CO) and methyl methacrylate(MMA) with azodiisobutyronitrile(AIBN) as initiator and toluene as solvent under anhydrous and anaerobic conditions. The structure of copolymer was characterized by FT-IR and the relative molecular mass and its distribution of the copolymer were determined by gel permeation chromatography(GPC). Performance of the synthesized pour point depression was also evaluated. The results show that the yield(59.20%)and the average molecular weight(2.722×105) of the polymer is higher with narrow relative molecular weight distribution (PDI=1.51) under the conditions of the ratio of monomer m(CO):m(MMA)= 1:1, the initiator AIBN dosage of 0.25% at 80 ℃ for 8 h. When 0.5% (w) copolymer was added to the lubricating oil, the pour point depression is most positive(ΔSP=10 ℃).

Abstract:The effects of the dosage and grinding time of the super dispersant polyethylene oxide-thick cyclic aromatic hydrocarbon block copolymer on the particle size, thermal stability and centrifugal stability of pigment violet 23 were studied. The microscopic dispersion of ink was observed by TEM, and the mechanism of dispersant on pigment violet was analyzed by infrared spectroscopy. The results showed that the particle size of the purple paste was up to 138nm, and the dispersion stability was the best, after grinding for 2.5h with 15% super-dispersant. The adsorption between the dispersant and the pigment violet is driven by the adsorption of the hydrophobic group of the dispersant -- the thick cyclic aromatic hydrocarbon and the benzene ring structure of the pigment violet 23 by accumulation, which causes the infrared absorption change of the C-H bond. The thixotropic value is 5.47, which is in line with the national standard. And the long-term storage of ink, line, hydrolytic resistance are better.

Abstract:Nerol and geraniol（Ⅰ）, which are precursors of the two stereoisomers of citral, were first oxidized to their corresponding aldehydes（Ⅱ）, respectively, and the aldehydes were further oxidized to their corresponding acids（Ⅲ）. Then, terminal alkynyl esters（Ⅳ） were prepared by nucleophilic substitution reaction of the acids（Ⅲ） with bromopropyne, followed by Husigen cycloaddition reaction of the terminal alkynyl esters（Ⅳ） with a series of substituted azide compounds to yield twenty-six (Z)- and (E)-citral-based 1,2,3-triazole compounds(Ⅴa ～ m). All the target compounds were characterized by FTIR, 1HNMR, 13CNMR, and ESI-MS, and also evaluated for their antifungal activity. It was found that, at 50 μg/mL, the target compounds Ⅴa ～ m showed certain antifungal activity against the eight tested plant pathogens, including Colletotrichum lagenarium, Fusarium oxysporum f.sp.cucumerinum, Cercospora arachidicola, Physalospora piricola, Gibberella zeae, Alternaria solani, Helminthosporium maydis, and Rhizoctonia solani, in which (E)-citral-based p-bromobenzyl 1,2,3-triazole [(E)-Ⅴm], (E)-citral-based o-methylbenzyl 1,2,3-triazole [(E)-Ⅴb], and (Z)-citral-based m-methylbenzyl 1,2,3-triazole [(Z)-Ⅴc] had inhibition rates of 95.2% (A-class activity level, better than that of the positive control chlorothanil), 81.0% (B-class activity level), and 81.0% (B-class activity level), respectively, against Colleetotrichum lagenarium. Besides, compound (E)-Ⅴm had inhibition rate of up to 95.2% against Helminthosporium maydis (A-class activity level, better than that of the positive control chlorothanil). Therefore, the target compound (E)-Ⅴm is worthy of further investigation and expected to become a new candidate antifungal agent.

Abstract:Imidazolium-based ionic liquid functionalized salen Mn complex (IL-salen Mn) was synthesized and employed as the only catalyst for the one-pot transformation of styrene and CO2 into styrene carbonate. First, styrene was converted efficiently into styrene oxide by using urea hydrogen peroxide (UHP) as an oxide in the presence of pyridine N-oxide (PyNO). Subsequently, the as-obtained styrene oxide was transformed into styrene carbonate via cycloaddition with CO2. The effects of reaction parameters such as catalyst type and dosage, additive amount, oxide type and amount, reaction temperature, reaction time, and pressure of CO2 were studied detailedly. When 8 mol% (based on the total mol of reactant) IL-salen Mn was used as catalyst, the molar ratio of styrene, UHP and PyNO was 1:3:0.2, epoxidation temperature was 30 ℃, epoxidation time was 5 h, the cycloaddition temperature was 80 ℃, cycloaddition time was 12 h, CO2 pressure was 1 MPa, the conversion of styrene (90 %) and selectivity of cyclic carbonate (32 %) were obtained. Furthermore, according to previous studies and in combination with the kinetic results, we proposed the possible mechanism for the tandem reaction.