Abstract:The poly (acrylic acid and vinyl acetate) - polyvinyl alcohol IPN superabsorbent resin was prepared by inverse suspension method, using cyclohexane as continuous phase, N,N-methyl- ene-bis-acrylamide as crosslinking agent，potassium persulfate as initiating agent，and Span 60 as dispersing agent. The effects of the degree of neutralization of acrylic acid，the monomer mixture ratio，PVA amount，initiating agent amount, crosslinking agent amount, and polymerization temperature were investigated. The results showed that the optimal conditions were as follows: neutralization degree of AA was 70%, m(AA):m(VAc)=3:1, w(initiator agent)=0.4%, w(crosslinking agent)=0.035%, w(PVA)=0.8%, reaction temperature 70℃. The resin has higher absorption rate with the water absorption rate under the optimal conditions reaching 1 889 g /g and the salt absorption rate reaching 124 g /g．The superabsorbent resin was characterized by means of IR spectroscopy, SEM and TG.

Abstract:The magnetic microspheres with pH- and thermo-sensitivity were prepared by dispersion polymerization in the presence of Fe3O4 magnetic fluid in an ethanol/water medium, using styrene, methacrylic acid, N,N-methylene-bis-acrylamide and N-isopropylacrylamide as comonomers. The morphology of the magnetic microspheres was studied by SEM. The diameter of microspheres was 1.5μm. The adsorption kinetics of bovine serum albumin were investigated. The equilibrium adsorption capacity was 565.6mmol/g. The adsorption kinetic was controlled by liquid film diffusion. The adsorption process could be described by Freundlich model.

Abstract:A vermiculite/poly(2-acrylamido-2-methyl-1-propanesulfonic acid-co-acrylic acid) (VMT/P(AMPS-co-AA)) superabsorbent composites was prepared in aqueous solution by glow-discharge electrolysis plasma (GDEP) as initiator and N,N'-methylene-bis-acrylamide as a cross-linker. The reaction parameters affecting the equilibrium swelling (i.e., discharge voltage, discharge time, vermiculite content, and content of crosslinker) were systematically optimized to achieve a superabsorbent composites with a maximum swelling capacity. The structure, thermal stability and morphology of VMT/P(AMPS-co-AA) were characterized by FT-IR, XRD, TG and SEM. In addition, a possible copolymerization mechanism initiated by GDEP was proposed. The results showed that AM and AMPS monomers have grafted onto VMT successfully by GDEP forming an amorphous composite. The VMT/P(AMPS-co-AA) exhibits a rough and porous structure with visible wrinkles and has a higher thermal stability. Copolymerization mechanism initiated by GDEP is a free radical reaction process.

Abstract:Abstract: In order to improve its waterproof effect, WD-10, with the main component of dodecyltrimethoxysilane, is modified by nano TiO2 with KH550 (3-aminopropyltriethoxysilane) as the coupling agent and OP-10(polyethylene glycol octyl phenyl ether) as the emulsifier. The characteristics, including water repellence, gas permeability, salt resistance, light resistance and climate resistance, were characterized. The results have been shown that the modified material possesses excellent water repellence and gas permeability with the contact angle of about 140? and the permeable percentage of 8% higher than that of WD-10. After two ageing cycles with saline solution, there was a 61.48 percent decrease in the weight loss rate comparing with WD-10. It was shown that the contact angle of WD-10 reduced to zero after 816 hours of UV aging, while the contact angle of the modified material was more than 90? From the 240h of laboratory climate aging of fine sandstone rock of Chongqing Dazu carvings, the World Cultural Heritage, the results showed that weight loss of modified material was only 1.07% and the contact angle changing rate was 10.38%, both were less than 1.95% and 24.34% of WD-10. Therefore our self-developed waterproof material of stone relics, WD-10 modified by nano TiO2, improves better than WD-10 on the gas permeability, salt tolerance, light resistance and climate resistance. Moreover, excellent water repellence can keep for a long time.

Abstract:In order to obtain monodisperse PLGA magnetic microspheres, compsite emulsion method and T-shaped microchannel device were adopted and used in this paper. Gelatin aqueous solution dispersed with nano-Fe3O4 particles was acted as inner aqueous phase. PLGA dichloromethane solution was served as oil phase. And PVA aqueous solution was used as outer aqueous phase. The effect of flow velocity ratio and volume ratio on the preparation of magnetic microspheres was investigated. The ingredient, morphology, size distribution and magnetic performance of resulted samples were characterized by means of FTIR, SEM and VSM respectively. Drug release performance of the microspheres was tested by using aspirin as the loading model drug. The results show that homogeneous spherical shape of the microspheres can be obtained at flow velocity ratio of the outer aqueous phase to the W/O phase is 120:1, as well as the volume ratio of the oil phase to inner aqueous phase is 2:1. The coefficient of variation (CV) with the microsphere size distribution can reach to 4.66%, indicating its good monodispersity. And the saturation magnetization is 1.52emu/g, showing high magnetic responsiveness. Meanwhile, the microsphere exhibit good paramagnetism. The drug loading microspheres show uniform release by stages within 60h. The monodisperse PLGA magnetic microspheres prepared in this paper is expected to be used for magnetic responsiveness drug carrier.

Abstract:As the intermediate of the borate ester bonding agent，N- (2- hydroxyethyl) -2- oxazolidone was synthesized from dimethyl carbonate and diethanolamine by the uniform design．The regression equation of the yield of N- (2- hydroxyethyl) -2- oxazolidone and reaction conditions were gained with the aid of SPSS software．The optimum reaction conditions were that n(dimethyl carbonate)：n(diethanolamine) equaled 1.3，m(Sodium methoxide)/m(diethanolamine) equaled 0.50 ％，reaction temperature 60 ℃and reaction time 60 minute，the yield of N- (2- hydroxyethyl) -2- oxazolidone reached 98.2 ％．Application of the borate ester bonding agent（BEBA），which was synthesized with the mixture of N- (2- hydroxyethyl) -2- oxazolidone and diethanolamine as the raw material，in 5 L four groups hydroxyl terminated polybutadiene propellant was investigated，and the result show that BEBA improves the room temperature and high temperature mechanical performance of the propellant by 15 % above the design requirements of the engine，the high temperature adhesion index is 1.02，and its comprehensive performance is better than the results of LAB-303B，BAG-5 and BA603．

Abstract:Abstract: The synergistic effect of three binary mixtures of nonionic/anionic surfactants including coconut oil ethoxylate(COE-30)/sodium linear alkylbenzene sulfonate(LAS), coconut oil ethoxylate(COE-30)/sodium alcohol ether sulphate(AES-2) and coconut oil ethoxylate(COE-30)/fatty alcohol ether carboxylates(AEC-5) was investigated. Non-ideal solution theory was used to determine the composition of the two components and the synergistic parameters in both mixed micelle and mixed absorption monolayer. The data indicated there is relatively strong synergistic effect in three binary systems. The synergistic parameters in mixed micelle and mixed absorption monolayer range from -6 to -3. The three blending systems exhibit synergistic effect in surface tension reduction efficiency and capacity for formation of mixed micelles, COE-30/AES-2 and COE-30/AEC-5 systems exhibit synergistic effect in surface tension reduction capacity as well.

Abstract:Bis(octylamidoethyl)-butane sulfonate surfactant, was prepared from an excessive 1,4-butane sultone and intermediate N,N-bis(octylamidoethyl)-amine, which was synthesized from octanoic acid, diethylenetriamine and potassium hydroxide(as a catalyst). The chemical structures of the intermediate and the surfactant were characterized by FT-IR, ESI-MS and 1HNMR.Its surface tation in different temperature was determined by pendant drop method, the results showed that critical micelle concentration (CMC) of surfactant was 1.41 ×10-3 mol/L and the minimum surface tension(γCMC) was 26.78 mN/m at 298 K. With an increase in temperature, the CMC gradually increased, γCMC and maximum surface adsorption capacity Γmax decreased. With the addition of NaCl solution (0.2 mol/L), the CMC and γCMC reduced to 4.20×10-4 mol/L and 25.51 mN/m.

Abstract:Abstract: Effects of H2O on catalytic reaction system for reductive alkylation of p-aminodiphenylamine/MIBK was studied. Platinum nanoparticles supported on activated carbon with high specific surface area was used as a catalyst for reductive alkylation reaction under different H2O content conditions. Schiff base forming datas, catalytic activity and stability of the catalyst were investigated under aforementioned reaction conditions. Fresh and used catalysts were characterized by SEM, TEM, ICP, XRD,BET and particle size analysis. The results indicated that H2O could decrease schiff base formation rate, catalytic activity and stability, making the structural damage of the supports and the grain aggregation, exacerbating Pt loss and enrichment of contaminating metal elements,while dewatering was significative on this problem.

Abstract:Kaolins were calcined at 773 K and then treated with H2SO4 solution to obtain modified kaolin supports. Ni-V supported modified kaolins were prepared via an impregnating process in different n(Ni2+)):n(V5+) impregnation solution, and the obtained samples were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), pyridine adsorption in FTIR (Py-FTIR) and ultraviolet-visible spectroscopy (UV-vis) techniques, respectively. Methanol conversion to dimethyl ether was used as a model reaction to evaluate sample activity under high-pressure mercury lamp irradiation. The results showed that the as-obtained samples had photocatalytic activity to methanol conversion. The methanol conversion and dimethyl ether selectivity could be up to 30.5% and 76.2%, respectively, when the Ni-V with n(Ni2+):n(V5+)=2:8 loading calcined kaolin leached with 40% H2SO4 followed by calcination at 773 K was used as catalyst. The synergy of Ni-V elements and the sample acidity played important roles in accelerating the photocatalytic conversion of methanol.

Abstract:A series of zinc-based mixed oxides catalysts were prepared by urea precipitation. The catalysts were characterized by XRD, SEM, BET and CO2 -TPD and then studied for the synthesis of propylene carbonate(PC) from urea and 1, 2 - propylene glycol. The results showed the amount of alkali may be the main factors that affect the catalytic activity e.g. the strong basic sites may promote to reduce the activation energy of the reaction between PC and HPC. The yield of propylene carbonate could reach as high as 99.8% under the optimum reaction conditions:170℃，1h, PG: Urea=1.5, 300mmHg, 0.6g catalyst (quality of urea).Zn/Mg 1:4 catalyst after five times regeneration, PC yield was reduced by 2.2%.

Abstract:In order to explore the annual change of essential oils contents and their chemical compositions from the leaves of E.exserta and E.urophylla, the essential oils were extracted in different months with steam distillation respectively and their chemical compositions were determined with GC-MS. The best harvest time of the essential oils were confirmed according the extraction ratio of the essential oils. The results showed that the extraction yied of essential oils from the leaves of E.exserta showed a significant seasonal change while the essential oils from E.urophylla did not. The extraction yield of essential oils from E.exserta in May, September and October were relatively higher and the leaves of these months were suited for extracting essential oils. The major compositions of the essential oils from E.exserta were α-pinene, β-pinene, eucalyptol and the major constituents of essential oil from E.urophylla were α-pinene, eucalyptol, borneol, α-Terpineol. The content of major compositions in each month varied considerably.

Abstract:The dabigatran etexilate(Ⅳ) was synthesized from Ethyl 3-(2-(((4-cyanophenyl)amino)methyl)-1-methyl-N-(pyridin-2-yl)-1H-benzo[d]imidazole-5-carboxamido)propanoate by Pinner reaction and Acylation Reaction. The structure was confirmed by IR, 1H NMR and ESI-MS. The influencing factors of intermediate Ⅱ, Ⅲ and target compound dabigatran etexilate (Ⅳ) in the synthetic reactions were investigated. The optimized overall yield was 53.6%, which was superior to literature.

Abstract:(±)-2-Amino-3-methylene pentanoic acid hydrochloride is a biologically active natural product，which was synthesized via Grignard reaction，oxidation，Grignard reaction，Wittig reaction etc unit reaction using serine as the raw material. Finally，the target compound was obtained in ten steps with an overall yield of 39%. The reaction conditions of oxidation，Grignard reaction and Wittig reaction were optimized. The improved process can be used to the synthesis of β-substituted vinylglycine analogues.

Abstract:Palygorskite/ polyhydroxy dendrimer polymer composite material was prepared by divergent method using cyanuric chloride, 4-(aminomethyl)piperidine, salicylaldehyde and reduced salicylaldehyde Schiff base modified palygorskite with NaBH4 as raw material. The structures of composite materials were characterized by FI-IR, TG and elemental analysis. The morphology of materials was measured by SEM. The adsorption capability of composite material for organic phenol or heavy metal ions was superior to palygorskite in aqueous solution. The results had indicated that the maximum adsorption capacity of the second generation dendrimers polymer/ palygorskite (PGS-G2) for p-nitrophenol, hydroquinone and Pb(II) was 35.3 mg/g, 34.02 mg/g, 44.8 mg/g at 293K, pH 5.0 and the amount of the adsorbent was 10 mg when the initial concentration was 50 mg/L. The adsorption kinetics data indicated that the adsorption fitted well with the pseudo-second-order kinetic model.

Abstract:A series of multifunctional binary hindered amine light stabilizers(HALSs) were synthesized from cyanuric chloride, 2,2,6,6-tertramethypiperidine-4-ol and 2-hydroxyphenylbenzotriazole derivatives nucleophilic substitution. The new light stabilizers were confirmed by 1H NMR, IR and ESI-HRMS. And properties of six compounds had been studied, such as UV-Vis absorption, thermal stability and light stability. The results show that they have strong absorption in about 360nm, The maximum molar absorption coefficient (ε×105/L•mol-1•cm-1) was 3.67, 4.06, 4.22, 3.99, 4.65, 5.31, respectively. The oxi-dation resistance and photostabilization efficiency of six compounds can considerably improve the oxi-dation resistance and polymer photostability. The temperature of the TGA tests spectra of compound are 210 ℃, 225 ℃, 224 ℃, 238 ℃, 181 ℃ and 185℃, resectively. The time of mass decomposition rate of the copolymers is longer than 100h.

Abstract:The hyperbranched styrene-maleic anhydride polymers were modified with alcohol, and a series of modification conditions, such as reaction temperature, time, types and dosages of alcohol, were investigated in detail. Aimed at the dispersity for red P.R122, Esters of hyperbranched styrene-maleic anhydride copolymer M-BPSME were preparated on the basis of optimizing conditions. M-BPSME has been characterized by FTIR spectra, and has higher esterification degree when reactive time is 6h and temperature 80oC. Besides, the dispersing ability of LPSMA, BPSMA and M-BPSME to red P.R122 was as follows: M-BPSME > BPSMA > LPSMA. Interesting, BPSME showed high dispersity to red P.R122, that centrifugal and heat stabilities were over 97%.

Abstract:In this paper, the effects of molecular weight, hydrophobic monomer proportion and hydrolysis degree on turbulent drag reduction (DR) characteristics of hydrophobically associative water-soluble polymers (HAWP) were investigated using a self-designed air-driven fluid resistance test apparatus. Compared with the microstructure of different concentration observed by ESEM, DR mechanism of HAWP was discussed. The results of experiments show that: when molecular weight is above 1000×104 g/mol, DR ratio has two peak values respectively at the concentration of 200mg/L and the critical association concentration (CAC), otherwise DR ratio only has one peak value at around CAC. The HAWP with higher molecular weight has greater 1st peak value and the HAWP with lower molecular weight has greater 2nd peak value. When concentration below CAC, the HAWP with greater hydrophobic monomer proportion has weaker DR ability, but when concentration goes above CAC，the HAWP with greater hydrophobic monomer proportion has stronger DR ability. The HAWP with greater hydrolysis degree always has stronger DR ability within the test concentration range.

Abstract:(Tetrahydrofuran-3-yl) methanol enantiomers were converted to two (tetrahydrofuran-3-yl) methyl-camphor sulfonate diastereomers with (D)-(+)-10-camphorsulfonic chloride, the diastereomers were then separated by kinetic resolution to get (+)-(tetrahydrofuran-3-yl) methyl-camphor sulfonate. The separated (+)-(tetrahydrofuran-3-yl) methyl-camphor sulfonate was dissociationed with sodium hydride/benzyl alcohol to give (S)-(+)-(tetrahydrofuran-3-yl) methanol, The ee value >99, the yield is 85%, Further reaction with (1,5-Dimethyl-[1,3,5]triazinan-2-nitro imino)-hydrazine to prepare (S)-(+)-dinotefuran.

Abstract:Recently, the selective hydrogenation of C=C bond in isophorone (IP) has been a hot issue. Egg-shelled catalysts Pd/Al2O3 were prepared by incipient impregnation method, and effects of supports calcination temperature, egg-shell depth, Pd loading and particle size, type of solvents and reaction conditions on selective hydrogenation of isophorone (IP) were well investigated using fixed-bed hydrogenation microreactor. Results indicate that egg-shelled Pd/Al2O3 is a perfect catalyst for the selective hydrogenation of IP to prepare 3,3,5 - trimethylcyclohexanone (TMCH), and the conversion of IP and selectivity of TMCH both reach up to 99.5% at mild conditions, showing good prospects for industrial application.

Abstract:Copper p-toluenesulfonate was prepared for replacing the Bronsted acid, which has a strong corrosive and many side effects. It can be employed as the catalyst for the condensation of glycerol with benzaldehyde and reached a good result. By optimizing the process with response surface methodology, the concrete procedure was as follows. The molar ratio of benzaldehyde to glycerol was 1:1.3, the volume for petroleum ether was 1.3 times of benzaldehyde and the dosage of catalyst was 0.9mol% of benzaldehyde. The yield of benzaldehyde glycerol acetal showed the maximum conversion of 96.0%. The acetal was an isomer mixture of two kinds of substance. It observed the transformation conditions between isomers by taking toluene as solvent. The high value of cis six-member ring was separated out extensively by crystallization under low temperature (about -20°C). The purity of the product was 96.8% and isolated selectivity was 40.8%. The reaction mechanism was explored. Furthermore, the characterization of target products were analyzed by means of GM-MS,IR and 1HNMR．

Abstract:Two straight chain multi SO3H-functionlized Keggin-type heteropolyacid ionic hybrids (HPAILs-1-2) were synthesized by using aliphatic polyamines, 1,4-butane-sultone and Keggin type heteropolyacid as the sources chemicals via quaternarization and acidification two step reaction。Their structure were confirmed by FT-IR,1H NMP and XRD.HPAILs-1-2 acted as heterogeneous catalysts for oxidation of cyclohexanones using 35% H2O2 as oxidant under solvent-free conditions was studied. Upon the optimized conditions，when the mole ratio of HPAILs-1-2/cyclohexanone/H2O2 =0.05:1:2.5,the reaction could completed at 50℃ within 3 hour and gave ε-caprolactone in the isolated yields of 75% and 70%. HPAILs-1-2 could be easily recovered after filtration, washed with water, diethyl ether and drying under vacuum and reused five times without significant loss in their catalytic activity.

Abstract:Two new synthetic routes to bioactive diterpene compound ( )-ferruginol starting from ( )-dehydroabietylamine were reported. Route 1: The reductive deamination of ( )-dehydroabietylamine with hydroxylamine-o-sulfonic acid and sodium hydroxide yielded dehydroabietane, followed by Friedel-Crafts acylation, Baeyer-Villiger oxidation and hydrolysis, gave ( )-ferruginol in 29.5% overall yield. Route 2: The reductive deamination of ( )-dehydroabietylamine, then reacted with phthaloyl peroxide to give ( )-ferruginol, overall yield 31.9%.

Abstract:4,4’-dihydroxy-3,3’-dinitrobenzophenone was synthesized by chloroben- zene and chlorobenzoyl chloride through three-step reactions, which were Friedel- Crafts acylation reaction, nitration reaction by mixed acid, and alkaline hydrolysis reaction in alcohol-water medium. The total yield of 4,4’-dihydroxy-3,3’-dinitrobenz- ophenone was 78.34%. Analysis such as FT-IR, MS, 1HNMR and HPLC were used to analyze the structure and purity of products. Single factor experiment was used to study on the process of alkaline hydrolysis reaction and got the optimism condition, under which the yield of the crude product was 96.71%, and its purity was 97.11%. In order to obtain purer product, using DMF and ethanol to recrystallize the crude product can improve the purity of product to 99.30%, and the reycrystallization yield was 81%.