Abstract:Poly(3,4-ethylenedioxythiophene)/camphorsulfonic acid (PEDOT/HCSA) composite was prepared with camphorsulfonic acid as the doping agent and FeCl3 as the oxidant.The products were characterized by FT-IR and SEM. The conductivity was related to the molar ratio of EDOT to HCSA and FeCl3 as well as the reaction time. Combining with the results of electrochemistry properties, it’s showed that PEDOT/HCSA composites prepared with the molar ratio of EDOT: HCSA: FeCl3 as 2:1:20 and the reaction time of 41h would be a potential supercapacitor electrode material with a conductivity of 10.4 S?cm-1 and a specific capacitance of 140 F/g after 150 charge-discharge cycles.

Abstract:Tetramethylammonium hydrogen carbonate was synthesized directly from dimethyl carbonate and trimethylamine in water. The effects of materials molar ratio, reaction temperature and time on the yield of product were investigated. The optimum reaction conditions were listed as follows: dimethyl carbonate and trimethylamine molar ratio was 1:1.2, reaction temperature was 105℃, and reaction time was 5h, yielding product up to 93.0%.

Abstract:In this paper, organic, inorganic and organic/inorganic composite antibacterial agents were reviewed through introduction of the type, mechanism, research status and prospects of the agents. Numerous studies showed that achieving high antibacterial efficiency, safety, persistency and stability of antibacterial agents were always projects of design and application of the agents. Derivatization of natural antibacterial agents, polymerization of organic synthetic antibacterial agents and composition of organic and inorganic agents are all research work for the projects and also development direction of antibacterial agents.

Abstract:The pH-sensitive mesoporous nanocomposite PMAA/SBA-15 was synthesized by free radical polymerization.The nanocomposite was characterized by X-ray diffraction, Fourier-transform infrared spectroscopy,thermogravimetric analysis,transmission,N2 adsorption-desorption and electron microscopy.With Aspirin as model drug, the drug release behavior of the composite was studied. It was found that the composite remained ordered hexagonal structure, but the surface area, the pore volume and the pore size of the composite were decreased. In the release medium of pH=7.4 the release of Aspirin was much quicker than pH=1.0.Therefore, the release of Aspirin from the nanocomposite could be controlled by changing pH. The PMAA/SBA-15 composite has a potential application in drug release.

Abstract:A series of novel quaternary amphiphilic chitosan derivatives(DEAE-CMC)were prepared.The DEAE-CMC/VB12 microspheres were prepared by “Emulsion—Crosslinking—Solidification” method. The partical size, topography and microstructure of the microspheres were analyzed by laser particle size analyzer and scanning electron microscopy (SEM).The result showed that the average partical size of the DEAE-CMC/VB12 microspheres was 4.53 μm。The drug release behavior of the DEAE-CMC/VB12 microspheres in pH=7.4 phosphate buffer solutions showed that: the release equilibrium time was 60 h, the entrapment efficiency was 33.70 ,and the loading content was 12.47 %. At the equilibrium, the accumulated release ratio of the drug was 56.30 %.

Abstract:The cyclodextrin dimer (trans-Azo ?-CD Dimer) and the adamantyl modified polyacrylamide (PAM-Ad) were synthesized. A supramolecular system was constructed by the formation of inclusion complex between trans-Azo ?-CD Dimer and PAM-Ad. The results of 2D NMR measurement indicated that the host-guest interaction between trans-Azo ?-CD Dimer and PAM-Ad was carried out through the formation of inclusion complexes between ?-CD cavity and the hydrophobe Ad. The interaction between trans-Azo ?-CD Dimer and PAM-Ad was depended on the concentration of trans-Azo ?-CD Dimer,PAM-Ad and the photoisomerization of trans-Azo ?-CD Dimer. The influences of salt concentration and temperature on the viscosity of mixture solution were also studied.

Abstract:In the conditions of ultrasonic auxiliary and no inert gas protection, Fe3O4 nanoparticles were prepared successfully by the combination of oxidation-coprecipitation method and chemical coprecipitation method, and were characterized by XRD, FT-IR and SEM. The results show that the Fe3O4 nanoparticles have a better crystal structure, and the particle size is about 7nm. Orthogonal experiments prove that ultrasonic time is the main factor that affects the particle size of Fe3O4 nanoparticles, and the molar ratio of Fe2 to Fe3 is the secondary factor. Water-based magnetic fluid was prepared through the surface modification of Fe3O4 nanoparticles by citric acid. The magnetization curve indicates that its coercivity and remanent magnetization are low, and shows good superparamagnetism.

Abstract:A series of CdSe-deposited CdS nanowires with different CdSe content were prepared from precursor hexagonal CdS nanowires under different concentration of Na2SeSO3 aqueous solution using hydrothermal method. The phases, compositions, morphologies and optical properties of these composite nanowires were further characterized using XRD, SEM, TEM, UV-Vis, PL and FTIR measurement techniques. The results show that the CdSe with nano-layer crystal deposited on the surface of CdS nanowires exhibits hexagonal wurtzite structure; such CdSe content can be controlled by changing Na2SeSO3 aqueous concentration, reaction temperature and/or reaction time. In comparison with optical properties of CdS nanowires, the absorption range of the nanocomposites becomes much wider, whereas the CdS fluorescence in the nanocomposites shows quenching behavior due to the existence of CdSe, and also, the emission of the CdSe has not been observed. In addition, their optical properties and reaction mechanism are elucidated in detail.

Abstract:Four N-[γ-(dialkylamino)alkyl]perfluorooctanesulfonamides [C8F17SO2NH(CH2)nNR2, n = 2, 3; R = -CH3, -CH2CH3] were synthesized from the reaction between perfluorooctanesulfonyl fluoride (C8F17SO2F) and N,N-dialkyl-alkanediamine [NH2(CH2)nNR2, n = 2, 3; R = -CH3, -CH2CH3], from which derivative products (four hydrochloride salts [C8F17SO2NH(CH2)nN+HR2Cl-] and four quaternary ammonium salts [C8F17SO2NH(CH2)nN+R2(CH3)I-]) were obtained by acidification with hydrochloric acid and quaternization with CH3I, respectively. The solubility and surface activities of these cationic fluorinated surfactants in aqueous solution were studied. The effects of length of linker group (hydrocarbon spacer) and the size of hydrophilic group on the performance of these cationic fluorinated surfactants were discussed. It showed that these two factors, i.e. such changes in the length of linker (hydrocarbon spacer) and the size of hydrophilic group, could significantly influence the solubility of surfactants but insignificantly influence their surface activity. This could be attributed to the strong hydrophobicity of fluorocarbon chains which overwhelming upon the influence from the length of linker (hydrocarbon spacer) and the size of hydrophilic group. The detailed differences between the behaviors of these surfactants could be explained in the term of solubility, adsorption state on the air/water interface, steric effect and charge density distribution.

Abstract:With simultaneous enzyme releasing and lipoxygenation, the catalytic performance of soymeal to catalyze the hydroperoxidation reaction was evaluated, using ethyl linoleate as the substrate. The influences of various parameters relating to the hydroperoxide yield, including pH, temperature, dosage of soymeal and ethyl linoleate were investigated. The optimal conditions for ethyl linoleate were 1.5 g ethyl linoleate in 7.5 mL phosphate buffer solution of pH 6 with 0.45 mL ethanol as co-solvent reacting for 2 h at 15 oC, and the yield reached 55%, which is much higher than the previously reported(15%). Soymeal has much better catalytic performance than LOX solution. The application of soymeal not only reduces the number of steps by coupling extraction of LOX and oxidation reaction, but also increased the total yield.

Abstract:Ultrasound assisted extraction was used to extract tannins from Eucalyptus grandis x E.urophylla .The crude extract tannins were purified by the macroporous resin adsorption. The antimicrobial activities of tannins on multiple common bacteria were studied by using filter paper method, and the oxidation resistance of samples were studied by three different systems. Tannin in crude extract was 4.01% and increased to 53.12% when was chromatograhied by macroporous resin. Tannins had strong inhibition on the 7 kinds of bacteria activities but no distinct inhibition on Excherichia coli. Minimun antimicrobial concentration of the purified tannins on Staphyloccocus aureus、Yeast and Shigella was 1.0 g/L, and the antimicrobial activities against Live Bacillus Cereus Preparation and Salmonella were stronger than their effects against positive control. The maximum scavenging rates of crude tannins and purified tannins for H2O2 were 80.00%, 89.12% when mass concentration was 0.50 g/L, and their IC50 were 0.11 g/L and 0.12 g/L, respectively. The maximum scavenging rates of Vc , crude tannins and purified tannins for DPPH•were 98.43%, 88.97% and 92.21%. When mass concentration was 4.00 g/L, the highest scavenging rate of crude tannins and purified tannins for •OH were 87.52% and 94.32% .

Abstract:Cymbopogon Citratus from Hainan Province was extracted through distillation extraction to obtain essential oil. It was found that extraction time, solid-liquid ratio, grass particle size, plant part, and extracting solvent affect the yield and the components of the essential oil. The yield varied from 0.09% to 1.06%. When 50g dry Cymbopogon Citratus with the length of 2 cm was extracted with1400mL water containing 8 g sodium chloride for 180 min, the oil yield was 1.06%. Although a considerable chemical variability was observed, the essential oils were mainly composed of linalool, neral, geranial, geraniol, and geranic acid. The total amount of the five compounds varies during 86-96%. Hydroxyl radical scavenging antioxidant activity of the essential oil was examined through electron paramagnetic resonance. The scavenging ability of 1% oil solution in ethanol was about 32%.

Abstract:The β-cyclodextrin microspheres were synthesized in inverse emulsion with β-cyclodextrin as material and epichlorohydrin as cross-linking agent, then the rose perfume was cured by them. The preparation process was optimized through the L9(34) orthogonal experimental design and the structure and performance were identified by FT-IR spectroscopy, X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The extraction rate of rose perfume and the yield of inclusion compound can reach 64.2% and 89.5% respectively under the following conditions : m(β-CD microsphere/g):V(perfume/mL)=4:1, time 4h, emperature 50℃, stirring 600 r•min-1. Influence factors were the percentage of the rose perfume oil in β-CD microsphere inclusion, the reaction temperature, the agitating rate, the reaction time in order.

Abstract:In order to improve the collagen in vitro absorbed through skin performance, prepared fishskin hydrolyzed collagen liposome with lecithin and cholesterol by using film materials method.Using emulational Franze diffusion pool to do diffusion test with excised skin of male mice, detected Collagen protein content by HPLC. Investigated the content of collagen liposome which uptake through skin and absorption rate. The experimental results show that the molecular weight of 3500 Da fishskin hydrolyzed collagen the liposome after sealing bag, 21.9% can through skin within 24h, doubled a direct daub collagen passes the skin absorption rate. It be proved that small molecules collagen encapsulated by liposomes can improve performance absorbed through skin in vitro.

Abstract:In this study, a synthesis approach to pregabalin intermediate of isobutylsuccinonitrile(III) was proposed. Thus, III as well as 5-methyl-2-cyano-hex-2-enoic acid ethyl ester (I) and 2, 3-Dicyano-5-methyl-hexanoic acid ethyl ester (II) were synthesized from isovaleraldehyde and ethyl cyanacetate by three-step reaction of Knoevenagel Condensation, Cyano-addition and Decarboxylation. An 81.4% of overall yield was obtained by investigating molar ratio, temperature and reaction time to optimize the reaction conditions. The structures of the intermediates were characterized and confirmed by 1H NMR, IR and MS.

Abstract:With the aim to increase the yield of ethyl maltol and to decrease the content of sodium chloride in discharge water, the sealed hydrolization method was used to improve the atmospheric pressure hydrolization process in the course of synthesizing ethyl maltol by furol and chlorine gas. The process conditions of sealed hydrolization method were optimized by orthogonal experiment, and the optimum process conditions were as follows: the reaction temperature was 125℃, the reaction pressure was 2.1MPa, the volume fraction of methanol in solvent was 65%, and the reaction time was 3.5h. Comparing with atmospheric pressure hydrolization process, the yield of ethyl maltol was increased 3.9%, the consumption of sodium hydroxide was decreased 78％, the content of sodium chloride in discharge water was reduced 77.4%, and the chloromethane resulted as byproduct could be recovered and utilized by the sealed hydrolization process under the optimum process conditions.

Abstract:A novel Ni-S-Co/ZrO2 composite electrode was prepared by electrodeposition with ZrO2 particles of 200 nm ~ 400 nm in diameter dispersed in the bath. The XRD result suggests that the Ni-S-Co/ZrO2 coating is composed of amorphous Ni , Co , S and crystalline monoclinic ZrO2 particle. The SEM images show that the coating is composed of granules with porous surface and ca. 50 m in diameter, providing high specific area. The coating is homogeneous and tightly combines with the Ni substrate with a Ni-S-Co interconnecting layer. Electrochemical tests show that the overpotential for hydrogen evolution reaction (HER) of the Ni-S-Co/ZrO2 composite electrode is 145 mV at a current density of 100 mA•cm-2 in 28% KOH solution at 25℃, which is 50 mV lower than that of the Ni-S-Co electrode. The incorporation of ultrafine ZrO2 particle into the Ni-S-Co alloy coating effectively improves the electrocatalytic activity of the Ni-S-Co electrode for hydrogen evolution reaction. The optimal conditions for electrodeposition of the Ni-S-Co/ZrO2 composite electrode are studied as well.

Abstract:The soap-free copolymer micro emulsion solutions of methyl methacrylate(MAA), n-butyl arcylate(BA), divinylbenzene and acrylic acid(AA) were prepared by employing potassium salt of maleic anhydride lauryl alcohol monoester as reactive emulsifier, n-amyl alcohol(PA) as co-surfactant and ammonium persulfate(ASP) as free-radical initiator at 75℃. The synthesis condition of reactive emulsifier- potassium salt of maleic anhydride lauryl alcohol monoester was optimized via orthogonal test. Using reactive emulsifier as a substitute for conventional emulsifier, the fatliquoring-retanning agent with a reinforcing effect was synthesized by micro emulsion copolymerization. The experimental product was used in retanning chrome tanned pigskin splits. The effect of the product was observed by measuring leather´s tensile strength, tearing strength and bursting strength. The result showed when the reactive emulsifier and monomer mixture(n-butyl arcylate(BA), methyl methacrylate(MAA) and divinylbenzene) was 120g and 180g, respectively, and the active monomer- acrylic acid was 10g, the retanning effect was best. In addition, the mechanical property of leather was highly improved, the horizontal tear strength was improved by 58.8%, while longitudinal tear strength was improved by 37.4%, and burst strength was improved by 54.1 %.

Abstract:Dialdehyde starch-aniline Schiff-base (DAS-AN) was synthesized with dialdehyde starch (DAS) and aniline as reactants, and acetic acid as catalyst in dimethyl sulfoxide (DMSO) homogeneous system under N2 atmosphere. The synthesis conditions of DAS-AN were studied and the optimum conditions were as follows: the mass concentration of DAS is 100 g/L in DMSO, the dosage of acetic acid is 3% (volume), reaction temperature is 50℃, the molar ratio of aldehyde group to amino group is 2:1, and reaction time is 12h. Under the optimum conditions, the utilization ratio of aniline is 94% with DAS5 (the dialdehyde content is 5%) as reactant, and that is 55% with DAS20 (the dialdehyde content is 20%) as reactant. The structure of DAS-AN is characterized by FT-IR, NMR and XRD.

Abstract:Hexylated carboxymethyl starch with high viscosity was prepared by esterification of hexanoyl chloride and carboxymethyl starch using dimethyl sulfoxide (DMSO) as solvent and pyridine as catalyst. The reaction conditions, such as the reaction temperature, time, solvent volume and the amount of catalyst were investigated and the optimum reaction conditions were obtained as follows: 5 g CMS/40 mL DMSO (0.125 g/mL), reaction temperature 50 ℃, reaction time 30 min, organic base 1.0 g（0.025 g/mL）. Hexylated carboxymethyl starch was characterized by IR and the viscosity properties of solution were investigated using Brookfield R/S - CC rheometer. Result of viscosity properties of different concentration and DShexyl of HCMS indicates that the viscosity value of HCMS can increase to 34000 mPa.s（γ= 5 s-1）at DShexyl of 0.3 when the concentration reaches critical aggregation concentration(2.0% w/w).

Abstract:A well-defined graft polymer cellulose and poly butyl methacrylate was synthesized by atom transfer radical polymerization with cellulose –Br which was synthesized by2 – bromopropionyl bromide and cellulose in ionic liquid[AMIM]Cl, CuBr and PMDETA as initiating system , DMF as solvent. The macroinitiator and polymers were confirmed by means of FTIR , 1H-NMR and GPC. The experiment studied the polymerization activity and the impact on polymer molecular weight and molecular weight distribution by time, catalytic systems ,solvent and other characteristics. The results show that reaction conversion rate increased linearly with time, the process is active and controlled polymerization, the reaction process used PMDETA / CuBr and DMF is more efficient.

Abstract:Ultrafine disperse dye/latex complex colorants dispersion was prepared through miniemulsion polymerization with polymerizable emulsifier (DNS-86). The influences of co-emulsifier, emulsifier, and ultrasound processing time on properties of complex colorants dispersion were investigated. The results show that hexadecane(HD) was more effective than cetyl alcohol(CA) and dodecanethiol（DDM）; The stability of ultrafine disperse dye/latex complex colorants dispersion prepared with DNS-86 was obviously superior to that with conventional emulsifier; When the concentration of DNS-86 was 14.4 mmol?L-1, the weight ratio of cetyl alcohol to monomer was 7.5%, ultrasound processing time was 15min, the ultrafine disperse dye/latex complex colorants dispersion prepared had a diameter of 123nm and Npf/Nmi value of 1.23 ,which indicated that the polymerization was mainly taking place in droplet nucleation.

Abstract:The common aromatic polyamide composite reverse osmosis (RO) membrane is easy to be oxidated. 2,2-difluoro-1,3-diaminopropane (DFPDA) as a key functional monomer can be used to prepare the chlorine resistance composite reverse osmosis membrane by interfacial polymerization technology. In this study, DFPDA was synthesized through a three-step reaction including fluorination, amidation and reduction. The diethyl malonate as substrate was first reacted with the fluorination reagent of selectfluor to get the first intermediate 2,2-difluoro-diethyl-malonate(DFDEM), then the DFDEM was amidated by ammonia water to prepare the second intermediate 2,2-difluoro-malonamide(DFMA), and lastly the resulting DFMA was further reduced via boron hydride (BH3) to obtain the final product DFPDA. The reaction technologies of three steps including fluorination, amidation and reduction were investigated, and thereinto the fluorination technology was optimized through orthogonal test, at the same time the fluorination mechanism was discussed. The chemical structures of all products were identified via infrared spectra (IR), hydrogen nuclear magnetic resonance (1HNMR) and mass spectragraph (MS). This current method for preparing the DFPDA has several advantages, including the accessible substrate, mild reaction condition, safe operation and relatively high yield.