Abstract:In order to look for a performance better the zinc ions fluorescent probe. In the paper, we synthesized zinc ions fluorescent probes, namely N- (quinoline-8-methylene) benzoyl hydrazide (L), based on a Schiff base structure, using quinoline-8-carboxaldehyde as the material, characterized with IR,NMR to structure of the fluorescent probe，and studied mechanism of zinc ions. Zinc ions fluorescent probe has excellent selectivity, the biggest fluorescence wavelength of 523 nm. The detection limit of zinc ions fluorescent probe was calculated as 4.1×10-8 mol/L. The result showed probe with zinc ions formed complex of the mole ratio of 1:1. Mechanism for tridentate ligand by nitrogen atom of quinoline, imine nitrogen atom of the Schiff base and oxygen atom of amide carbonyl with zinc ions coordination, forming stable fused compound.

Abstract:In order to improve hydrophilicity and mechanical properties of polyvinylidene fluoride (PVDF) membrane, silane coupling agent silane ethenyltrimethoxy and alkali were respectively used to modifie Al2O3 and PVDF, with benzoyl peroxide (BPO) as initiator, the modified Al2O3 was introduced into PVDF, the modified Al2O3 / PVDF hybrid membrane was prepared through thermal induced phase transition as well. Subsequently, the effects of silane coupling agent on Al2O3 particle size were investigated, and the effect of different alkali concentration and alkali treatment time on PVDF structure were studied. Additionally, the properties of modified membrane were studied as well. As the results, when the mass fraction of silane coupling agent was 33%, the size of Al2O3 particles reduced to 43.47 nm. Accordingly, when the mass fraction of modified Al2O3 particles was 5%, rejection and flux of the hybrid membrane reached up to 83.12% and 621.5 L/m2.h respectively, and the mechanical properties of hybrid membrane reached up to 5.01Mpa.The higher flux and mechanical properties of the membrane are attributed to the introduction of modified Al2O3 particles.

Abstract:Tolylene-2,4-diisocyanate, poly(propylene glycol), 2, 2-bis (hydroxymethyl) propionic acid, glyceryl monostearate, acid red B as the main raw materials, a color polyurethane leather dye was synthesized by self emulsification method, of which the structure was confirmed by Fourier transform infrared spectroscopy. The study found that, comparing with acid red B, there is a red shift of 38nm in the peak of 200～250nm. Experiments showed that the color polyurethane film has good heat resistance. The color polyurethane film has excellent resistance to dry and wet rub performance. As well as the color polyurethane emulsion has excellent freeze-thaw stability and high temperature stability.

Abstract:Low molecular weight AA-SSS copolymer was prepared by the acrylic acid(AA) and styrene sulfonate (SSS) in the existence of (NH4)2s2o8-NaHSO3 system. The best synthesis condition of inhibiting pickling skin swelling was determined by orthogonal test which is n(AA):n(SSS) = 1.5: ,and the dosage of (NH4)2 s2o8 and NaHSO3 is 5% and 3% of the total monomer respectively. Mn of polymer was determined by GPC and which is 2069 and distribution coefficient is 1.05. Pickling with 3％best polymer alone, swelling degree of pickling skin is 11.51％，at the same time, the pickling skin will not swell, if 3.2％sodium chloride (based on limed hides weight) was taken into pickling process, and the usage of salt in the pickling process achieved greatly reduce. Compared with the traditional process, the shrink temperature and physical mechanical properties of wet-blue leather have not obvious changes, the content of chrome in wet-blue leather more uniform, SEM shows that dispersion of section of leather is fine.

Abstract:Cationic fluorinated polyacrylate emulsion-free emulsion was synthesized using poly(2-(dimethylamino)ethyl methacrylate)-b-poly(hexafluorobutyl acrylate) (PDMAEMA-b -PHFBA) synthesized by reversible addition fragamentation chain transfer（RAFT）polymerization as a stabilizer via emulsion-free emulsion polymerization. The latex particle and polymer were characterized by means of Fourier-transform infrared spectroscopy(FTIR), 1H nuclear magnetic resonance spectroscopy (1H-NMR), transition electron microscopy(TEM )and dynamic light scattering (DLS). The results showed that when the dosage of PDMAEMA-b-PHFBA was 2.4%，the emulsion displayed the good stability and high monomer conversion, and the latex particle with a core-shell structure and narrow particle size distributiond was obtained. The leather finished by cationic fluorinated emulsion-free emulsion showed good water-proof and oil-proof properties. The water and diiodomethane contact angle of finished leather increased with increase of the amount of hexafluorobutyl acrylate. When the dosage of hexafluorobutyl acrylate was 10%, the water contact angle was up to 125?and the diiodomethane contact angle was up to 81.5?

Abstract:An efficient procedure for the lipase-catalyzed synthesis of Starch Ferulate has been established in non-aqueous system. Corn starch was used as the acyl acceptor and ethyl ferulate was used as the acyl donor. The trans-esterification of starch with ethyl ferulate was carried out in a few kinds of solvent at different temperatures and different times. The amount of lipase and the ratio of starch to ethyl ferulate also had been studied. The maximum degree of substitution of Starch Ferulate 0.031 was obtained by the presented method under the optimum reaction conditions: Novozym435 lipase as catalyst, isooctane as reaction medium, molar ratio of ethyl ferulate to starch was 3:1, amount of Lipase was 10%, 65 ℃ for18 h. The structure of Starch Ferulate was analyzed by FT-IR and 1H NMB.

Abstract:A emulsion liquid membrane method with trioctylamine as carrier is used to extract 6-APA (6-Aminopenicillanicacid) from the wastewater. The influences of types of membrane solvents, carrier concentra-tion, internal phase concentration, oil/internal phase ratio (the volume ratio of oil to internal phase), the pH of external phase, emulsion/external phase ratio (the volume ratio of emulsion phase include internal aqueous phase to the external aqueous solution) and stirring speed on the transition of 6-APA are investigated. The results show that the extraction rate of 72.9% was achieved through one stage of emulsion liquid membrane separation in 30 min at conditions as: the volume ratio of kerosene, trioctylamine, liquid wax, surfactant Span80 were 88%, 5%，1%，6% , the mass concentration of Na2CO3 is 5%, V(oil phase):V(internal phase)= 2:1, the pH of external phase is 5.5～6.5, V(emulsion phase):V(external phase)=1:4, and the stirring speed is 300～350 r/min. Over two stage emulsion liquid membrane separation, the extraction rate can up to 93%. The centrifugal emulsion method was used to separate the oil phase and internal phase. The breaking rate of 65.2% was obtained. the recovery of oil phase was reused in emulsification, and the extraction of 6-APA can up to 68%. It is a technological method with high efficiency and environmental protection.

Abstract:To solve the single color problem on cotton fabric by Green Walnut Husk pigment extract, the dyeing process on index of color features and color fastness were optimized combining with single factor design and orthogonal experiment, and four selected factors were mass concentration, pH, dyeing time and temperature. Further more, the influence of the dyeing performance of cotton fabric were compared by the mordant dyeing methods of single metal salt and the double metal salts complex pair. The results showed that the optimal extraction conditions as follows: dyeing temperature 90oC, pH value 4.0, mass concentration 71.40 g/L, dyeing time 140 min. For dyed cotton fabric, a wide spectrum range and excellent friction fastness was observed. As for soaping fastness, single metal salt mordant dyeing of cotton fabric was post-mordanting  pre-mordanting  meta-mordanting  direct dyeing. And the color fastness of double metal-complex salt and single metal salt mordant of Fe3+, Fe2+, Cu2+, Al3+, Cr6+ reached more than level 3. X-ray diffraction analysis showed that the internal structure of cotton fiber was not affected, In addition, the findings indicated that the anti-ultraviolet property of dyed cotton fabric enhenced distinctly by single metal salt mordant of Fe3+, Fe2+, Cr6+, Sr2+, Na+, K+ and double metal-complex salt mordant of Fe2+/Cu2+, Fe2+/Ti4+, Cu2+/Ti4+, Cu2+/Sn2+, Al3+/Cr6+, Cr6+/Ti4+ and Cr6+/Sn2+.

Abstract:Different kinds of deep eutectic solvents were synthesized with different quaternary ammonium salts, methyl tributyl ammonium chloride, tetramethylammonium chloride, benzyl triethyl ammonium chloride and choline chloride, and DL-lactic acid with molar ratio of 1:9, respectively, and used to dissolve the lignin in eucalyptus. It was found that deep eutectic solvents of benzyl triethyl ammonium chloride/DL-lactic acid (TEBA/HL) had best solubility selectivity, as the dissolution ratio of lignin was 92.3wt% after 10 h under 90 ℃ and the dissolution ratio of total cellulose was only 8.3wt%, meanwhile, the specific value (K) of solubility selectivity coefficient between lignin and total cellulose reached to 158.5, suggesting the best solubility selectivity for lignin of TEBA/HL. FT-IR spectrum analysis showed that the structure of the extraction materials contained characteristic functional groups of lignin, and GPC analysis suggested that the molecular weights of the extraction materials were all reduced. CP/MAS 13C NMR analysis suggested that structure characteristics of the extraction materials from TEBA/HL at 90 ℃ were close to lignin of hardwoods.

Abstract:Based on the solubility experiments of acid-rock reaction, using ICP、19FNMR、31PNMR、XRF and XRD analytical technique to analyze the ions concentration and chemicals in spent acid and reaction-after residues so as to research reaction performance between multi-hydro acid and sandstone minerals and to evaluate the deep-penetration effect of multi-hydro acid by core flooding experiments under high temperature and high pressure. The ICP and XRD results showed with the increasing of temperature, the possibility of producing silica gel will increase, and when the temperature is up to 150℃, all the reaction between acid and 4 sorts of minerals will generate silica gel precipitation. XRF and XRD results demonstrated that 6% multi-hydro acid has a stronger solubility to sandstone minerals; and the reaction between multi-hydro acid and kaolinite, bentonite or illite can’t generate AlF3 secondary precipitation, but when reacts with chlorite, AlF3 precipitation could generate. And NMR results showed the same situation as well as multi-hydro acid has a good performance to chelate metal ions. Core flooding experiment demonstrated multi-hydro acid increased formation permeability by 53.3%, on the contrary conventional mud decreased by 28%;the result from measuring effluent of core flooding tests by ICP confirmed that multi-hydro acid chelated metal ions, and conventional mud acid formed silica gel.

Abstract:Abstract：A water soluble drag reduction agent (WDRA-M) applied in slick-water fracturing fluid was prepared by inverse emulsion polymerization. The chain flexibility was increased due to the introduction of long chain hydrophobic monomer (long chain methacrylates, WLHM). Dynamic Light Scattering (DLS), slick-water friction tester and dynamic rheometer were used to characterize the particle size and distribution, drag reduction efficiency and rheology properties of WDRA-M. The particle size analysis of WDRA-M shows its average particle size is 76.95nm and PDI is 0.108, which indicates the uniform distribution of WDRA-M. The drag reduction efficiency can be up to 62% at the optimum addition 0.7g/L. WDRA-M displays a non-Newtonian behavior, and the value of storage modulus (G', 0.783 Pa) is larger than that of loss (G'', 0.354 Pa), which illustrates an obvious elastic behavior of WDRA-M. It can reduce the friction resistance. The apparent viscosity is decreased from 43.46 mPa•s to 38.66 mPa•s, and the apparent viscosity retention rate is 89.0% when the shear rate was 170s-1, the shearing time 30 min at 25℃. The field application results show that the drag reduction efficiency of WDRA-M is 42.5% higher than guanidine gum, and 12.5% higher than foreign similar product at the displacement of 3.5m3/min.

Abstract:The microemulsion using nonyl hydroxybenzene polyethoxylate ether (TX-10) and cetyl trimethyl ammonium bromide (CTAB) as surfactants, alkanol compounds (such as n-propyl alcohol, n-butyl alcohol, n-pentyl alcohol and n-octyl alcohol) as a co-surfactant and petroleum ether as oil phase was developed. The phase behavior of the microemulsion was investigated. The standard Gibbs free energy change of transfer of alkanol from oil to interface (ΔGθo→i) was determined by dilution method and particle size and surface tension were measured. The interactions between alkanols with different lengths and surfactants were verified by Materials Studio7.0 (MS). The results indicated that we had prepared the W/O petroleum ether microemulsion successfully. When n-octyl alcohol was co-surfactant, pseudo-ternary phase diagrams showed that the area of microemulsion region was the largest, the value of ΔGθo→i was lowest and it was -4.7298kJ•mol-1, average particle size was 68.06nm. Surface tension reached 24.618mN/m when the mass concentration of microemulsion was 0.5%. Molecular dynamics indicated that the χ and Emix CTAB/n-octyl alcohol mixing system were 10.4832 and 6.2080kJ•mol-1 and TX-10/n-octyl alcohol mixing system were 11.5286 and 6.8271kJ•mol-1, respectively. So the compatibility of surfactant / n-octyl alcohol mixing system was the best and interaction was strongest. Compared with others, n-octyl alcohol was the most suitable co-surfactant for this system.

Abstract:Acrylate latex pressure sensitive adhesive(PSA) was synthesized via pre-emulsified semicontinuous seeded emulsion polymerization, using Environment-friendly Polymeric Emulsifiers LR-10/LG-20 as hybrid emulsification systems.The effects of emulsifier proportion, content and kinds on performances of PSA were respectively investigated. The other relative performances were then characterized. The results showed that the stability of emulsion is best when the m(LR-10):m(LG-20)=3:1; The results of gel permeation chromatography(GPC) revealed that the molecular weight and molecular weight distribution (MWD) decreased as the increase of emulsifier content. The particle size of latex and PDI reach to the minimum when ω(emulsifier)=3%, at the same time the adhesive property and water resistance are optimal, which the contact angle of latex film was 112? The results of FTIR indicated that the whole monomers and emulsifiers participate in emulsion polymerization reaction; Compared with conventional emulsification systems, the adhesive property of Environment-friendly Polymeric Emulsifiers is better.

Abstract:(1S,2R,3S,4R)-2,3-O-isopropylidene-4-amino-cyclopentane-1,2,3-triol was prepared from D-alanine by the reaction of esterification, protection of amine group, hydroxylamination of ester group, oxidation of hydroxylamine group and Diels-Alder cycloaddition, dihydroxylation of double bond, protection of hydroxyl group, and de-acyl group and hydrogenation. The reaction conditions of key steps such as hydroxylamination of ester group, oxidation of hydroxylamine and Diels-Alder cycloaddition, dihydroxylation of double bond, and de-acyl group were optimized. The results are as follows: 1) The yield of compoundⅤwas increased from 55% to 90% by using ester Ⅳ instead of N-Boc-alanine as raw maerial; 2) The yield of compound Ⅵ was increased from 53% to 83% by using "one pot" Swern oxidation and the cycloaddition reactions; 3) In the oxidation of double bond, potassium permanganate was used as oxidant instead of highly toxic osmium tetroxide; it avoided using expensive and poisonous reagents. The total yield of the target was 59%, which was increased by 32% compared with the yield in the literature.

Abstract:The cofactor recycling and reutilization of carbonyl reductase catalysis in Candida parapsilosis (C. parapsilosis) was reinforced by coupling with permeabilized cell of Candida boidinii (C. boidinii). Thus an effective permeabilized cell coupling system was constructed for preparation chiral (R)-phenethanol. The experiment results were as follows: substrate and production infiltration ability of permeabilized C. parapsilosis were enhanced, its substrate conversion rate was improved from 33.5% to 43.8%; the substrate conversion rate was further improved from 43.8 to 52.1% by adding cofactor in addition; the cofactor recycling efficiency could be greatly enhanced by coupling with permeabilized C. boidinii with adding cofactor in addition, the substrate conversion rate could reach as 71.8%. The permeabilized cell coupling system reaction conditions were optimized as: when the C. parapsilosis cell mass was 0.2 g, the cell mass ratio of C. parapsilosis and C. boidinii was 1.5:1, substrate concentration was 10 mmol/L, cofactor concentration was 1% of substrate concentration (as 0.1 mmol/L), its substrate conversion rate could reach as 78.2%. The cells were re-collected by centrifugation for multibatches reaction. The substrate conversion rate could still keep at 55% when the coupling system was reacted for 12 batches, the total substrate conversion rate was 70.3%, the production was determined as (R)-phenethanol, its enantiomeric excess(e.e.) was 98.2%.

Abstract:Two types of manganese dioxides with various morphology are prepared by hydrothermal method based on the redox reaction between Mn(NO3)2 and (NH4)2S2O8 under different hydrothermal conditions. The prepared MnO2 are characterized by XRD, SEM, TEM and H2-TPR techniques, and tested for the catalytic combustion of dimethyl ether(DME). The results show that the concentration of reactants and the reaction temperature mainly influence the morphology of MnO2. With the concentration of Mn(NO3)2 rise to 0.2 mol/L, the shape of α-MnO2 change from nanorod to urchin; Improving the concentration of (NH4)2S2O8 above 0.1 mol/L favors for the formation of uniform urchin shape of α-MnO2; The sulfur acid affect greatly the crystal structure of MnO2 , and enhancing the concentration over 0.61 mol/L can make the MnO2 evolving from γ phase to α phase. Compared with α-MnO2, the urchin-like γ-MnO2 displays better activity in the DME combustion reaction with a T10 of 145℃ and a T90 of 236℃, which is related with the H2-TPR result.

Abstract:In this report, the Cu2O/polyaniline(PANI)/stainless steel based electrode was prepared by electrochemical oxidation method. Cyclic voltammetry technique was carried out to research the electrochemical behavior of Cu2O/polyaniline nanotubes(PANI NTs). X-ray diffraction(XRD) and transmission electron microscope (TEM) were used for characterizing the as-obtained electrode. The reduction product of CO2 was analyzed by acetylacetone spectrophotometric method and gas chromatographic method. The results show that the Cu2O/PANI NTs are successfully loaded and exhibited excellent catalytic activity and CO2. The concentration of formaldehyde is 29.5μmol/L after reducing CO2 for 15h by photoelectrocatalysis with Cu2O/PANI/stainless steel based electrode.

Abstract:Pt/carbon cloth (Pt/ACC) electrodes were prepared via underpotential deposition of Cu in combination with replacement reaction between Cu and Pt precursor by using anodized carbon cloth (ACC) as conductive substrate. The results showed that the loading amount and dispersion of Pt could be accurately controlled by adjusting Cu deposition potential. With the variation of deposition potential from 0.32 to 0.15 V vs. RHE, the loading amount of Pt on ACC increased linearly. The results of hydrogen evolution in 0.5 MH2SO4 revealed that with the increasing in Pt loading, the onset potential for hydrogen evolution decreased gradually. When deposition potential is 0.15 V vs. RHE, the loading amount of Pt is only 588 μg·cm-2 and the obtained Pt/ACC electrode showed comparable activity to Pt foil with a onset potential of -0.05 V vs. RHE, a overpotential of 68 mV to reach a current density of 10 mA·cm-2, and tafel slope of 34.2 mV·dec-1.

Abstract:Abstract：8-(dimethylamino) Methyl Myricetin (8-MYR) was totally synthesized starting from paraformaldehyde, dimethylamine and myricetin(MYR) and all compounds were characterized by IR, 1HNMR,13C-NMR, EI-MS,and elemental analysis. This article focused on the theoretical and experimental research on the antioxidative activity, DNA interactions and antitumor activities of 8-MYR and MYR in vitro,which was evaluated by Fenton-like reaction experiment, UV-Vis absorption and MTT method ,respectively.The results showed that 8-MYR and MYR had a certain ability to scavenge hydroxyl free radical and the scavenging ratio of them treated with10 μmo/L were 63.6% and 61.3%,respectively. In the electronic spectr , appreciable hypochromism can be observed for the two complexes with increasing amounts of DNA.and the Kb values of 8-MYR and MYR were 4.15×105(mol/L)-1and 3.38×105(mol/L)-1,respectively.The results of MTT assay showed that 8-MYR had significantly cytotoxic effects on HepG2 and LO2 and the IC50 value of 48 h were (183.40±11.96)μmol/L and (304.45±4.60)μmol/L,respectively.In a word，compared with MYR,8-MYR had the stronger antitumor activity,scavenging effects on hydroxyl radicals and interaction with CT-DNA.