Abstract:Silica(SiO2) sol was prepared by sol-gel method using tetraethyl orthosilicate as the precursor. And then modified SiO2 sol(VTEO/SiO2) was obtained through modified SiO2 by triethoxyvinylsilane(VTEO). At the same time, polyaniline(PANI) which doped with phosphoric acid grafted silica composite particles(PANI/SiO2) were prepared. Subsequently, the PANI/SiO2-VTEO/SiO2 composite coating was formed on the surface of Q235 steel by coating the mixture of PANI/SiO2 and VTEO/SiO2. The chemical structure was characterized by Fourier transform infrared spectroscopy (FTIR). The composite coatings were observed by scanning electron microscope (SEM). Hydrophobicity of composite coatings was tested by contact angle instrument. The anticorrosion properties of PANI/SiO2-VTEO/SiO2 composite coatings were tested by electrochemical impedance spectroscopy (EIS), open-circuit potential (OCP) and potentiodynamic polarization. The results indicated that the water contact angle of composite coatings was 150°which showed excellent hydrophobicity. The impedance (5.5×106 Ω) and corrosion potential(-0.2 V) were higher, and the corrosion current density(1.18×10-8 A/cm2) was lower. The corrosion rate was only 0.0001 mm/a. The composite coatings showed excellent anticorrosion performance.

Abstract:2-Hydroxyethyl acrylate and pentaerythritol triacrylate were used to synthesis two functionality waterborne polyurethane acrylate (WPUA2) and six functionality waterborne polyurethane acrylate (WPUA6). The structure and properties of PUA were analyzed by means of FTIR, particle size analyzer and TG. The study found that, compared to use low functionality WPUA2 UV curing polyurethane acrylate (PUA) film, the PUA gel content of cured film improved more than 20%, the water absorption rate decreased 30% when adding monomer or using multifunctional WPUA6; While the quality loss 10%, the temperature increased 82 °C. Improved the prepolymer functionality can effectively improve the coating crosslinking density and heat resistance, and possess similar application effect with adding active monomer.

Abstract:Abstract: Organic/inorganic nanocomposite films were prepared by the solution casting method by introducing sepiolite(SP) into Chitosan(CS)/Zein(ZN) matrix. The effects of SP addition on the mechanical properties and water-resistance were investigated. And the enhancement mechanism of SP loading in the matrix was also analyzed. The results revealed that the nanocomposite films have better miscibility, which resulted in the improved mechanical properties and water-resistance compared with the pure CS/ZN film. And it indicated that SP dispersed well in the CS matrix. The tensile strength increased with the increase of SP loading. When the content of SP loading was 2 wt%, the tensile strength reached the highest value of 21.1 MPa, which was increased about 8.4% comparing with pure CS/ZN. Meanwhile, the elongation at break of nanocomposites decreased from 15.3 to 7.5% with the SP loading increasing from 0% to 10 wt%. The water uptake value of nanocomposite decreased and then increased with the increase in SP loading. And the minimum value was obtained when the SP loading was 8 wt%. Furthermore, the light transmittance of the films decreased about 20% with the introduction of 6 wt% SP in the visible light regions of 800 nm.

Abstract:A concise method to synthesize 2-styryl-3,5-diethoxycarbonyl-6-methylpyridine derivatives was established. The intermediate of 2,6-dimethyl-3,5-diethoxycarbonylpyridine was synthesized by cyclization of ethyl acetoacetate, formaldehyde and ammonium acetate and oxidative aromatization. Nine title compounds were synthesized by condensation of benzaldehyde derivatives and intermediate in the reflux of acetic acid. The structures of compounds were confirmed by 1HNMR, MS and IR. The fluorescence spectral characteristics in different solvents of pyridine derivatives were studied, the results show that the maximum absorption wavelengths of pyridine derivatives in different solvents were between 302~382nm, emission wavelengths were between 397~537nm, molar extinction coefficients in 1.045×10-4 ~ 4.236×10-4L•mol-1•cm-1.

Abstract:In this paper, uniformed and narrow size distributional Fe3O4 nanoparticles were synthesized by thermal decomposition method. After that these nanoparticles were modified with polyethylene glycol monomethyl ether by thiol-ene method. They were characterized by XRD, TEM, FT-IR, Raman, TG, VSM and UV. It was showed that this method was simple, the reaction conditions was mild and the operating conditions was easy. These functionalized Fe3O4 nanoparticles were not only well dispersed in water and PBS, but also showed superparamagnetic property.

Abstract:Biomorphic aluminum oxide was prepared by impregnation-calcination method using filter paper as a template in this paper. The as-prepared biomorphic aluminum oxide was modified by vinyl triethoxy silane (A151) and modified sample became hydrophobic. The modified sample was characterized by hydrophobicity analysis. The oil-absorption resins can be synthesized with butyl methacrylate (BMA), butyl acrylate (BA) and styrene (St) as monomers by suspension polymerrization. According to the results of orthogonal experimental, the optimum technology conditions of composite resin were as follows: pore making agent was 5% (wt), cross linker was 3% (wt), initiator was 1% (wt) and hydrophobic biomorphic aluminum oxide was 4% (wt), respectively. The adsorption capacity and reusability of composite resin were improved obviously. The samples were characterized by hydrophobicity analysis, Fourier transformed infrared (IR), transmission electron microscope (TEM), canning electron microscope (SEM), and thermogravimetric differential thermal analysis (TG-DTA).

Abstract:Layered copper/zinc hydroxide nitrate (CZL) and nickel/zinc hydroxide nitrate (NZL) was synthesized by co-precipitation methods. The effect of pH and raw material molar ratio on preparation was investigated and discussed. Powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and thermogravimetry and differential thermal analysis (TG-DTA) were used to characterize the structure and thermostability of CZL and NZL. The results showed that the thermostability of NZL was much higher than that of CZL. Furthermore, the sodium dodecyl sulfate (DS) and dodecyl dimethyl carboxylbetaine (DCB) intercalation into the gallery of CZL and NZL were synthesized by co-precipitation and ion-exchanged methods. The results found that NZL-DS with pure phase was obtained by both methods; NZL-DCB was only obtained by ion-exchanged method; CZL-DS with two different structures was obtained by both methods, wherein NO3- cannot be totally substituted by ion-exchanged method. Moreover, DCB intercalation into the gallery of NZL and CZL were not successfully prepared by ion-exchanged method due to weak electrical property of DCB.

Abstract:The alginate (SA) composite microgel beads loaded the emamectin benzoate were prepared with calcium chloride (CaCl2) and chitosan (CS) as cross-linking agents, bentonite (BT) as an adsorbent. Furthermore, the Box-Behnken design was used to build the model and to analyze the effects of the mass fraction of sodium alginate (1.00~3.00 wt.%), the mass fraction of bentonite (1.00~5.00 wt.%), the concentration of calcium chloride (0.10~0.40 mol/L) and the fraction concentration of chitosan (0.50~1.50 wt.%) on the respond value, regarding the ratio of drug loading rate (DLR) to equilibrium swelling ratio (ESR) as the response value (UR，UR=DLR/ESR). Experimental results showed the relationship between the response value and four independent variables were in line with the quadratic model. That mathematical regression model had good predictability and the optimal conditions within the experimental ranges for the response value were forecasted to be 2.39 wt.% sodium alginate, 2.81 wt.% bentonite, 0.24 mol/L calcium chloride and 0.71 wt.% chitosan. Under these optimal conditions, the average value of the actual response value in three replicated experiments is 3.5509%, which is not significantly different from the value of 3.5836% predicted by the model. In addition, the composite beads prepared under the optimal conditions have encapsulation efficiency of 2.11%, drug loading rate of 98.31% and good sustained-release properties.

Abstract:Amorphous Ni-B catalyst has excellent catalytic hydrogenation performance, but the poor stability limits its application. A Ni-B/ K2Ti6O13amorphous catalyst, prepared by impregnation of K2Ti6O13 support with Ni ions which were reduced by KBH4 aqueous solution, was employed in liquid-phase hydrogenation of nitrobenzene to aniline. The obtained catalysts were characterized by the X-ray diffraction (XRD), thermogravimetric analysis(TG), temperature programmed reduction (TPR), and their specific surfaces were determined by N2 BET method. The results show that, the appropriate loading of Ni could stabilize the Ni-B active species of the catalyst. Meanwhile, it could also increase the thermal stability and activity of the catalyst. The optimal catalyst loading is 30 %, theoretically, with the reaction temperature of 100 ℃, hydrogen pressure of 2.0 MPa and reaction time of 120 min, the conversion of nitrobenzene and selectivity of aniline reached 99.5% and 99.9% respectively. The reaction conversion and selectivity was 98% and 93% after 6 times used , respectively.

Abstract:A type of filler La2O3/Al2O3-Al solid base catalyst for catalytic distillation was prepared via a hydrothermal synthesis route using lanthanum nitrate as the raw material and anodic aluminum oxide as the template. The catalytic activity of La2O3/Al2O3-Al was evaluated by self-condensation of acetone as a probe reaction. The catalysts were characterized by means of XRD and SEM. The results showed that the optimum condition was as follows: the molar ratio of La(NO3)3• nH2O to NH3•H2O was 1:8, the oil bath temperature was 160 ℃, the oil bath time was 10 h, the calcination temperature was 550 ℃ and the calcination time was 2 h in an N2 flow. Under the above conditions, the conversion of acetone was 4.1 % and the selectivity towards diacetone alcohol was 98 %.

Abstract:Ni-Na/ diatomite catalysts with different contents of Ni and different binders and pore- expanding agents were prepared by homogeneous precipitation method and equivalent- volume impregnation method, and the catalytic performances were studied. The catalysts were characterized by BET, XRD, NH3-TPD. The addition of Al2O3 greatly enhanced the mechanical strength of catalyst, and the optimum content of Al2O3 was 20%.With the increase of Ni, the dehydrogenation of Ni-Na/ diatomite catalysts increased firstly and then decreased, the catalysts with Ni content of 30% exhibited the best catalytic performance. The adjunction of PEG20000 changed the catalytic construction, increasing the pore size and specific surface area, and improved the selectivity of target product catechol. The research of the fixed bed reaction showed that under the reactions of 320℃ and 101.3kPa, the liquid space velocity was 1.0h-1, conversion of cyclohexanediol and selectivity of catechol for the catalyst Ni/Na diatomite reached 99.4% and 93.%, respectively, and the mechanical strength of catalyst was 85N/cm.

Abstract:Hexagonal prism shaped, nanoparticles and honeycomb-like HZSM-5 zeolite were synthesized using tetraethylsilicate and tetrapropylammoniumoxide as template agents, and Span-80 and Tween-80 as active agents. They were characterized by the methods of XRD, SEM, BET and NH3-TPD. The results showed that the honeycomb-like HZSM-5 has larger specific surface area and higher acidity than others. The CuO-ZnO-Al2O3/HZSM-5 bifunctional catalysts were prepared by mechanical mixing of CuO-ZnO-Al2O3 and HZSM-5. Its catalysis activity for carbon dioxide hydrogenation to dimethyl ether was investigated. Under reaction pressure at 3.0 MPa, space velocity of 1800 mL?gcat-1?h-1, volume ratio of CO2/H2 to 1 : 3 and temperature at 270 癈, the conversion of CO2 and yielding of dimethyl ether are 45.4 % and 20.1 %, respectively.

Abstract:Through the reaction of 4,5-diiodophthalonitrile with perfluorohexyl iodide, 4,5-di(perfluorohexyl)phthalonitrile was obtained, then 2,3,9,10,16,17,23,24 –octa (perfluorohexyl) cobaltphthalocyanine was synthesised. The products were characterized by 1H NMR, 19F NMR, MS, IR. Target product were characterized by HRMS,IR and UV-vis. It was used to catalysis the reaction of oxidation of ethyl benzene in fluorous biphase system. The results showed that: the conversion of ethyl benzene was up to 41.8% and the selection of acetophenone was 85.3% under the conditions of perfluorooctane as solvent, the molecular oxygen as oxidant, the amount of catalyst was 0.03 mmol, the reaction was carried out at 120℃ for 6 h. Fluorous biphase system can be repeatedly used five times without lossing its catalytic.

Abstract:To study the effects of enzymatic hydrolysis of chicken volatile flavor components, volatile flavor components in chicken enzymatic hydrolysate and chicken soup were extracted by solid-phase micro extraction (SPME), and identified by gas chromatography-mass spectrometry (GC-MS). The results showed that: a total of 63 volatile flavor compounds were identified in chicken enzymatic hydrolysate, including 19 aldehydes, 7 alcohols, 2 acids, 6 ketones, 2 esters, 2 ethers, 3 phenols, 8 hydrocarbons, 14 heterocyclic compounds. And 19 volatile flavor compounds were identified in boiled chicken, including 11 aldehydes, 3 alcohols , 1 ketones, 1 esters, 2 hydrocarbons, 1 heterocyclic compounds. The common identified substances are hexanal, octanal, nonanal, (E)-2-octenal, benzaldehyde, benzeneacetaldehyde, (E,E)-2,4-decadienal, 4-methoxy-benzaldehyde, 1-octen-3-ol, D-limonene.

Abstract:Benzaldehyde glycol acetal was synthesized from benzaldehyde and ethylene glycol using aluminum dihydrogen tripolyphosphate / loaded sulfur diatomite catalyst. The effect of molar ratio of alcohol to aldehyde, catalyst amount and reaction time on yield was studied by single-factor experiments. Box-behnken design and response surface analysis were used to obtain the optimization technical conditions of the synthesis of benzaldehyde glycol acetal. The results show that the three main influencing factors are in the order as follows: aldehyde alcohol mole ratio > reaction time > the quantity of catalyst. Variance analysis of multiple regression model show that the optimal technical condition is: temperature 115℃, molar ratio of benzaldehyde to glycol is 1: 2.6, reaction time1.23h, the quantity of 1%, water-carrying agent of cyclohexane 10mL. Under these conditions, the yield of benzaldehyde glycol acetal is above 88.1%. After catalyst repeated use five times, the yield of benzaldehyde glycol acetal still is 86.1%.

Abstract:Monomethoxy poly(ethylene glycol) Amine (mPEG5k-EDA) with the relative molecular mass of 5000 was prepared by two-step reaction. Monomethoxy poly(ethylene glycol) tosylate (mPEG5k-OTs) was synthesized by monomethoxy poly(ethylene glycol) 5000 (mPEG5k) and p-toluenesulfonyl chloride (p-TsCl) at first, and then reacted with ethylenediamine as nucleophile to obtain the target product. The optimal reaction conditions were obtained as follows by the orthogonal experiment: mole ratio between mPEG5k-OTs and ethylenediamine was 1:25, reaction temperature was 80℃ and reaction time was 24 h. The structures of product and intermediate were characterized by IR and 1H-NMR, and the variation of molecular weight of the product was detected by SDS-PAGE iodine staining method. The results showed that mPEG5k-EDA was prepared quickly and easily by this method, and the overall yield of the target product could be as high as 76.7% under the optimal experimental conditions. The purity of the target product was proved by SDS-PAGE without any crosslinking by-products.

Abstract:The kinetics of inhibitory effect of total ginkgolic acids ( C13:0, C15:1, C17:2, C15:0, C17:1 ) on the monophenolase and diphenolase activity of mushroom tyrosinase was studied. The effect on catalytic reaction of tyrosinase process, the enzyme activity inhibition rate and inhibitory kinetic parameters of total ginkgolic acids were tested at 28 ℃, pH = 6.8 Na2HPO4-NaH2PO4 buffer system. It was found that total ginkgolic acids efficiently inhibits both monophenolase and diphenolase activities of mushroom tyrosinase under experiment conditions. Concentrations of total ginkgolic acids leading to 50% rate inhibition (IC50) on monophenolase and diphenolase activity were calculated to be 0.03 g?L-1 and 0.20 g?L-1 respectively. The presence of total ginkgolic acids also prolongs the lag period in the oxidation process of L-tyrosine via tyrosinase. A reversible inhibition of diphenolase by total ginkgolic acids has been found, indicating that the inhibitor binds the enzyme reversibly other than reacts with it destructively. The Lineweaver-Burk plot demonstrates a competitive behavior of total ginkgolic acids in the tyrosinase oxidation of L-DOPA, with inhibition constant KI at 75.20 ug/ml.

Abstract:Soybean protein is found in protein adulteration of dairy products recently. In order to improve the oversight system for dairy product and ensure legal rights and interests of consumers, it is vital to build up a method for the indentification and the detection of soybean protein. In this paper, 12 kinds of different sources of soluble soy protein homogeneous slurry was analyzed and compared with the two commodities soy protein with SDS-PAGE method. It was found there were mainly 9 group soy proteins with molecular weight range from 1.90×104 to 8.50×104 in the 14 kinds of soy. Each group has a little difference in molecular weight, the relative difference is not more than 3.3%, and the relative content is basically the same. The soy protein molecular weight 4.96×104, 4.17×104, 3.57×104 and 1.98×104 of the soluble protein fraction can be used to identify soy protein adulteration in milk. The detection limit of 4.97×104 and 3.57×104 was 0.2 g/L/. This method had a good linear relativity (R = 0.9981) in the range from 0.1 to 10 g/L/ and the relative error is 0.63~13.3% within 0.60~8.0 g/L.

Abstract:N-alkyl-2-(4-hydroxybut-2-ynyl) pyridinium bromides (designated as O-16) were synthesized and characterized by 1H NMR、13C NMR and MS. The inhibitive performance of O-16 on X70 steel in 20% HCl was evaluated by weight loss，Tafel polarization and EIS techniques. The results showed that O-16 exhibited good inhibitive performance against acid corrosion for X70 steel. The inhibition efficiency increased with increasing concentration and could reach 99% at 3?0-5M of O-16. Tafel polarization curves of X70 steel indicated that O-16 is a mixed-type inhibitor controled predominantly cathodic reaction. The corrosion products formed on X70 steel surface were observed by SEM.

Abstract:2,6-dichloro-4-aminophenol was prepared by the electroreduction of 2,6-dichloro-4-nitrophenol on a three-dimensional copper mesh cathode in the electrolyte composed by chlorobenzene and H2SO4 solution. The electrochemcial behaviour was studied on Cu microelectrode by cyclic voltammetry, which indicated that electrochemical reduction of 2,6-dichloro-4-nitrophenol was an irreversible reaction controlled by diffusion. Influence of some key factors (such as cathode material, volume fraction of cosolvent, current density, temperature and H2SO4 concentration) on this reaction was investigated. Under the optimized condition, the yield of 2,6-dichloro-4-aminophenol reached by 94.8%. The yield could still be maintained at about 95% after the catholyte was continuously recycled eight times, indicating the catholyte can be reused multiple times without activity loss.

Abstract:A novel preparation of halogen-free flame retardant aluminum phenylphosphinate ( BPA-Al ) was studied by dichlorophenylphosphine and aluminium sulfate octadecahydrate under aqueous phase. The molecular structure of sample was characterized by 1H NMR, 31P NMR, FTIR and ICP. Under the optimal reaction conditions, the yield of BPA-Al was up to 89.6 %.Thermal stability of the products was investigated in detail by TG-DTA, which could meet decomposition temperature of the excellent flame retardant. The application of BPA-Al to Nylon 6（PA6）was investigated. The content is 10 %, the LOI to 30% and UL94 V- 0, the flame retardant of PA6 has been significantly enhanced. And it is also good mechanical properties, the tensile strength to 84.9 kPa.

Abstract:A flame retardant containing phosphorus JCHP-2 was synthesized using hexachlorotriphosphazene(HCCP), oligochitosan(JCH) and爀thanol. Linen fabric was finished by the flame retardant. Effect of phosphorus content and reagent dosage on flame retardancy of the finished fabric was discussed, and the durability was also tested. The results showed that the finished linen fabric exhibited good flame retardancy, which can reach B1 level of GB/T 5455-1997 when the dosage of JCHP-2 reached 12% and the phosphorus content was 14.41%. B2 standard was still met after 10 cycles of soaping. Thermalgravimetric analysis showed that the finished fabric's initial decomposition temperature was lowered, and the residue at 800℃ increased from 6.57% to 25.89%. All the above results indicated that the linen fabric finished with JCHP-2 had good flame retardancy.

Abstract:A rapid，accurate nuclear magnetic resonance( NMR) spectrometric technique was developed for the qualitative analysis of polyoxyethylene ether maromonomers in polycarboxylate superplasticizers. The main characteristic peaks in the NMR spectra of macromonomer were assigned，and the molecular weight was obtained by 1H NMR signal component analysis. The molecular weight was further verified by GPC. Meanwhile，esterification rate and residual rate of double bond were detected by 1H NMR in esterification reaction. The experimental results confirmed that NMR spectroscopy can be used to quantify the structures of macromonomer in polycarboxylate superplasticizers.

Abstract:m-chloroanisole was prepared from m-Chlorophenol in the presence of solid base and the phase transfer catalyst(PTC),using dimethyl carbonate(DMC) instead of dimethyl sulfate(DMS) as methylating reagent . The effect of solvent dosage, reactant mole ratio, reaction temperature and time on the conversion rate and yield of the product was studied. The optimum synthesis conditions were as follows through Response surface designs: Tetrabutyl ammonium bromide was used as PTC, Potassium carbonate was used as alkaline catalyst. n (m-Chlorophenol):n(DMC):n(Tetrabutyl ammonium bromide):n(Potassium carbonate)=1:3.83:1.07:0.5, reaction temperature 98oC, reaction time 7h. the yield of m-chloroanisole was 98.3% and the conversion rate of m-Chlorophenol was 100%.