Abstract:The orthogonal experimental research has been carried out on the calcium ammonia catalyst for the polymerization of ethylene oxide. The influences of catalyst synthesis parameters including the m(NH3):m(Ca), m(acetonitrile):m(Ca), m(propylene oxide):m(Ca), reaction time of calcium with ammonia, reaction time of modifier on the molecular weight of polyethylene oxide and polymerization yield were investigated. From the regression analysis, it was found that acetonitrile and propylene oxide were remarkable influence factors, and the industrialized preparation conditions of catalyst were determined. The industrial tests showed good catalytic performances with high polymerization yield (> 98%) and adjustable molecular weight of polyethylene oxide from 2×105 to 8×105.

Abstract:By oxidized to oxycellulose of bamboo with sodium periodate-formaldehyde method, a fine carrier for immobilized enzyme was prepared. The papain was immobilized by the carrier in this paper, and we investigated the factors for immobilized papain such as immobilization condition, its microenvironment, stability and so on. The results show that the modified bamboo oxycellulose was a fine carrier for immobilized papain when given 15mg/ml enzyme at 4℃and pH7.5 to immobilize 24h. Under the conditions of 50℃ and pH7.5, it had the best catalytic activity, the best one could be 805.5U/g .What's more, it is better than free enzyme for its thermal stability and alkali resistence, and it could remain 79.3% after 6 times repeated.

Abstract:4-((4-tert-Butyl) phenyl)-6-methyl-1,2,3,5-tetrahydro-s-indacene (III), an important ligand to prepare metallocene catalysts for olefin polymerization, was synthesized by Suzuki-Miyaura cross-coupling reaction catalyzed by Pd(dppf)Cl2 . The structure of the product was confirmed by 1H NMR, IR, GC-MS and MS. The effects of the kinds of catalysts, solvents, and bases on the reaction were studied in detail. Calculated on the base of 4-bromo-6-methyl- 1,2,3,5- tetrahydro-s-indacene, the optimized conditions were determined as follows: In the presence of 1.5 mol% of Pd(dppf)Cl2, 1.1 mol/mol of 4-tert-butylphenyl boronic acid, 1.5 mol/mol of K2CO3 and 1000 mL/mol of i-PrOH, the reaction mixture was stirred under reflux until reaching stable conversion of the bromoindene (ca. 26 h needed), the yield of III was 82.1%, and the purity was 99%. According to this practical method, bromide indene was successfully used as an intermediate to prepare aryl substituted indene，and the forming of indene double bond isomers was effectively inhibited in the present system.

Abstract:With the kaolin as raw material, the mesoporous material with high surface area, large pore volume and even pore size distribution, was prepared by microwave radiation method. Then with the mesoporous material as carrier, paraffin as phase change material, the paraffin/mesoporous composite phase change material was synthesized successfully via vacuum absorption. The mesoporous material obtained was characterized and observed by N2 physical adsorption and scanning electron microscopy (SEM)and transmission electron microscopy (TEM), which clearly revealed the structures of the samples. FTIR results confirmed that the paraffin was incorporate into the framework of the synthesized materials. The thermal performance of the composite material was characterized by differential scanning calorimeter (DSC).The diffused-exudative circle method was used to determine the stability of composite phase change material. The result showed that: the surface area of mesoporous material was 961.64m2/g, the pore volume was 0.854mL/g, and the average pore size was 2.78nm; the best adsorption quantity of 50% for mesoporous material; the phase change temperature was 60.5℃，phase change latent heat was 115.85J/g; the paraffin was considered as being imbedded into the net of the mesoporous material, and the composite material was provided with good thermal reliability and good chemical compatibility. Key Words: phase change material；paraffin; mesoporous material; kaolin; microwave radiation method

Abstract:The hydroxyl terminated polylactic acid was synthesized from lactic acid and 1,4-butanediol through solution polymerization combined with melt polycondensation catalyzed by stannous chloride and p-toluenesulfonic acid. High molecular weight polylactic acid was prepared by chain extension of hydroxyl terminated polylactic acid using hexyl dichloride as a environmentally friendly chain extender. The polymer was characterized by means of IR，1HNMR，and TGA. The results showed that the optimum response technological conditions is that the dosage of the hexyl dichloride is nCOCl: nOH of 1:1, and the deacid reagent pyridine is nPy: nHDC of 4:1，reacting for 45 min at 160℃，The Mη of chain extension product was 70825 and was 2.3 times higher than before chain extension.

Abstract:A new combustion catalyst-fullerene tyrosine lead salt was prepared with fullerenes, tyrosine and lead nitrate as raw materials. Synchronously, the structure of the target product was characterized by AAS、FT-IR、UV-VIS、MS、XPS. The thermal stability of fullerene tyrosine lead salt was studied by DTG and DTA, and the results indicated that the thermal stability of it was good. The interaction of RDX and fullerenes tyrosine lead salt was studied, showing that fullerenes tyrosine lead salt had a certain catalytic effect on the thermal decomposition of RDX，the value of lowering the activation energy of RDX is 13.28 kJ•mol-1.

Abstract:Contents of polysaccharides in five species in the family Berberidaceae, including Nandina domestica, Berberis thunbergii, Berberis thunbergii var. atropurpurea, Mahonia fortunei and Mahonia bealei were determined by phenol-sulfuric acid method, and antioxidant activities of polysaccharides in these five species were evaluated by ABTS (2,2’-azino-bis (3-ethyl-benzothiazoline-6-sulfonic acid) diammonium salt) and DPPH (1,1-diphenyl-2-picrylhydrazyl) assays. Average contents of polysaccharides in Nandina domestica, Berberis thunbergii, Berberis thunbergii var. atropurpurea, Mahonia fortunei and Mahonia bealei were 27.82%, 14.52%, 12.14%, 14.44% and 16.80%, respectively. EC50 values of ABTS•+ radical-scavenging capacity were 0.1688, 0.5436, 0.1604, 0.3991 and 0.1689 mg/mL, respectively, and EC50 values of DPPH radical-scavenging capacity were 0.0678, 0.3769, 0.2104, 0.2917 and 0.2224 mg/mL, respectively. There is no significant difference of polysaccharide contents among the same genera, while polysaccharide contents and antioxidant activities are different among various species. Both ABTS•+ and DPPH radical-scavenging capacities were dose dependent, and mathematical model based on dose-effect relationship had high goodness of fit. Contents and antioxidant activities of polysaccharides in Nandina domestica and Mahonia bealei were relatively high, which showed great potential for exploitation and utilization.

Abstract:Hyperbranched polyesters (HBPE) were synthesized based on 2-ethyl-2-hydroxymethyl-1,3-propanediol (TMP) as a core molecule and 2, 2-bis (hydroxymethyl) propionic acid (bis-MPA) as an AB2 monomer. P-tert-butyl-benzoic acid (PTBA) was used as the modifier and obtained modified products with substituted degree vary from 10% to 75% (HBP-10M---HBP-75M, collectively called HBP-Ms). The structures and number–average molecular weights of HBPE and HBP-Ms were tested by Fourier transform-infrared spectroscopy (FTIR), 1H NMR spectra and Gel permeation chromatography (GPC), respectively. The result showed that the average branching degree (DB) of HBPE was about 0.47. The polymers were soluble in acetone, DMF, ethylacetate, diethyl ether, benzene, and dimethylbenzene, and insoluble in n-hexane. The HBP-Ms cured films displayed excellent properties including high hardness, gloss and excellent flexibility. HBP-10M and HBP-25M exhibit better solubility and film properties. Thermogravimetric analysis (TGA) disclosed that the PTBA could improve the thermal stability of HBP-Ms.

Abstract:Tetracycline HCl (TC•HCl) in an artificial wastewater was electrochemically degraded using IrO2-RuO2/Ti as anode and Ti as cathode. The impacts of initial TC concentrations, current density, pH value, electrolyte concentrations on the degradation effect of TC were investigated. The energy consumption and current efficiency were compared according to operating conditions to reveal the optimal condition for electrochemical degradation of TC HCl. Results showed that electro-catalytic oxidation could effectively remove TC in aqueous solutions. Higher current density, lower initial concentrations of TC•HCl and/or lower concentrations of Na2SO4 as electrolyte could enhance the removal rate of TC•HCl. During 0-90 min of the reaction, pH had no effect on the removal rate. After 90 min, acidic and alkaline conditions both partly inhibited the degradation of TC HCl, for example, the removal rates at pH 3, 7 and 12 were 92 %, 100 % and 72 % after 300 min respectively. Degradation procedure was in accordance with the first-order kinetic model. With the analysis of the removal rate, energy consumption and current efficiency under various operating conditions, the optimal condition constitute the initial TC•HCl concentration of 300 mg/L, the current density of 10 mA•cm-2, the Na2SO4 concentration of 0.05 mol•L-1 and the pH value of 7 with a removal rate of TC•HCl 94 % after 180 min. The present study provides so far the primary data for wastewater management against TC HCl.

Abstract:Tri(2-propyl heptanol)citrate(TPHC) was prepared from Citric acid and 2-propyl heptanol,choosed activated carbon supported para toluenesulfonic acid as catalys.The results of experiments showed the best reaction conditions of esterification were described as follows: reaction time 4h,amount of catalyst 1.5%(based on the mass of acid),molar ratio of 2-propyl heptanol to Citric acid 3.7:1,reaction temperature less than 140℃.Esterification yield is greater than 99.5%.The product was confirmed by IR and MS.The TPHC was used as plasticizers in polyvinylchloride (PVC),analysised by Tensile properties,weight loss on heating and TG.The results showed that TPHC can excellent plasticized, with the performance of the high temperature and evaporate resistance and had great value of industrial development.

Abstract:Dodecanoyl diphenyl ether was synthesized by Friedel–Crafts acylation from lauric acid and diphenyl ether catalyzed by P2O5/SiO2, then sulfonated by chlorosulfonic acid to yield a new oil-based surfactant, sodium dodecanoyl diphenyl ether sulfonate. Structure of products was characterized by FT-IR and 1H-NMR, indicating that both the intermediate and the final product were obtained as desired. Performances of the surfactant, such as Krafft point (TK), surface tension, critical micelle concentration, resistance to electrolyte, calcium stability, lime soap dispersing power (LSDP), detergency, wetting time and foam ability were measured. Experimental results indicated that the surfactant possessed excellent low temperature solubility (TK< 0 oC) and outstanding electrolyte resistance, for example, to be able to solve in solutions of saturated sodium chloride, saturated calcium chloride, saturated hydrochloric acid or high concentration of sodium hydroxide, respectively. Therefore, it has the potential to replace alkyl diphenyl ether sulfonates. The surfactant is also a potential lime soap dispersing agent because it has very strong lime soap dispersing power (LSDP=6.5) and good detergency comparable to that of LAS.

Abstract:Imidazole modified HZSM-5 zeolite was prepared using tetrapropylammoniuhydroxide as template and imidazole as additive by hydrothermal synthesis method. The samples were characterized by the methods of XRD, SEM, EDS, BET, TG and NH3-TPD. The results show that adding a small amount of imidazole can produce uniform and smaller HZSM-5 zeolite particles with higher acidity and perfect resistance to high temperature performance. The CuO-ZnO-Al2O3/imidazole-modified-HZSM-5 bifunctional catalyst was prepared by impregnation method and its catalytic activity for hydrogenation of carbon dioxide to dimethyl ether was investigated. Under reaction pressure at 3.0 MPa, space velocity (SV) at 1800 mL?gcat-1?h-1, volume ratio to CO2/H2 at 1 : 3, temperature at 270 癈, molar ratio to CuO/ZnO at 2 : 1 and weight ratio to CuO-ZnO-Al2O3/imidazole-modified-HZSM-5 at 2 : 1, the conversion of CO2 and selectivity of dimethyl ether can be reached to 46.5 % and 37.8 %, respectively.

Abstract:A novel phosphovanadomolybdate-based ionic polymer/Fe3O4 composite catalyst Fe3O4@PIL-PMoV was synthesized, and fully characterized by FT-IR, TG, XRD, SEM, and VSM. Its catalytic performance was investigated in the hydroxylation of benzene to phenol with H2O2. The results demonstrate that Fe3O4@PIL-PMoV is a highly efficient heterogeneous solid catalyst for hydroxylation of benzene using CH3CN as the solvent, and the phenol yield and selectivity were 24.5% and 100%, respectively. After reaction, the catalyst could be easily recovered by an external magnet and reused directly in the next run. The excellent catalytic performance of the catalyst are closely related to the “solvent role” of the functional –COOH groups and the “pseudo-liquid behavior” of the heteropolyanion.

Abstract:4,5-Dibromophthalic acid was an intermediate of the synthesis of phthalocyanine compounds substituted carboxyl. Under the existence of the solvent methylene chloride, 4,5-Dibromo-o-xylene was synthesized by O-xylene and bromide through electrophilic substitution reaction.Then it was by the oxidation with potassium permanganate to get 4,5-Dibromophthalic acid. By studying the process conditions, we got the optimal reaction conditions of 4,5-Dibromo-o-xylene which was Br2 volume concentration 40%，O-xylene volume concentration 40%，Br2:I2: O-xylene（3.0:0.15:1.0 , molar ratio）and by enlarging 10 times of the experimental conditions, we got the yield 79.0% .And the optimal reaction conditions of 4,5-Dibromophthalic acid was that potassium permanganate, phase transfer catalyst and 4,5-Dibromo-o-xylene whose molar ratio were 6.0:0.04:1.0 , reaction time 10 h ,the temperature 100 ℃. By enlarging 10 times of the experimental conditions, we got the yield 85.5%.At last, the yield we got was higher than the reported 71.0% and the 77.0%.

Abstract:The starch based ionic and nonionic composite superabsorbent polymer (SAP) was synthesized fast under microwave irradiation by using cassava starch, partially neutralized acrylic acid and acrylamide. The effects of main synthetic technologies and swelling conditions on the swelling properties were investigated. The functional groups and morphology of the samples were characterized by FT-IR and SEM, respectively. It was found that SAP had a porous structure. The swelling processes of SAP in different temperature exhibited ?rst-order dynamics, and the swelling rate increased with the increase of temperature. The swelling ratio of the SAP was of pH and salt dependent. Furthermore, the swelling of SAP in organic solution was affected by the solubility parameter of solution, and the greater the difference of solubility parameter between organic solution and water was, the greater the swelling lost.

Abstract:With p-toluenesulfonic acid as acidic catalyst, employing resorcinol and ethylacetoacetate, 7-hydroxy-4-methyl coumarin, which owned UV absorption properties, was synthesized through dehydration condensation reaction. A coumarin light stabilizer which contains the structure of benzophenone was synthesized through joining the 7-hydroxy-4-methyl coumarin, ultraviolet absorber 2,4-dihydroxy-benzophenone and taurine in the same molecule by cyanuric chloride. The molecular structures were characterized by IR spectra and 1HNMR; optical properties were measured by UV spectra and fluorescence spectra, besides the effect of anti-UV aging was evaluated as the surface sizing agent on handsheet of high yield pulps by using the ultraviolet aging apparatus. The results showed that, with the optimal dosage, the coumarin light stabilizer was superior to reactive UV-Stabilizer or the conventional fluorescent brighteners on the effect of anti-UV aging, and the declining brightness of handsheet relative to them were 2.14%ISO and 3.13%ISO respectively.

Abstract:Abstract: Three (2-hydroxy-3-chloro)propylalkoxy ether compounds were prepared by the reactions of epichlorohydrin with n-butanol，iso-octanol， n-dodecanol respectively，and borontrifluorideethercomplex as catalyst.Then，using the three compounds we prapared ， respectively reacted with 2 - (2，4-dihydroxyphenyl)-2H-benzotriazole or 2 - (2，4-dihydroxyphenyl) -5 - chloro-2H-benzotriazole，six 2-[2 -hydroxy-4 -(2-hydroxy-3-alkoxy)propylphenyl]-(5-chloro-)2H-benzotriazole compounds(IIa，IIb，IIc，IIIa，IIIb，IIIc) were synthesized as type of resorcinol derivative，the yields were 83％，79％，78％，85％，74％and 77％ respectively. The target products were characterized by IR and MS，and tested by ultraviolet absorption spectrum ，all the six compounds have relatively strong absorption peak in 250 ~ 400 nm wavelength range.Maximum molar extinction coefficient(εmax) of compounds IIa，IIb，IIc，IIIa，IIIb and IIIc) was 23190.1Lmol-1cm-1(λmax=338.5nm)，23016.3Lmol-1cm-1(λmax=341.5nm)，23895.1 Lmol-1cm-1(λmax=339nm)，24368.0 Lmol-1cm-1(λmax=346.5nm)，22522.6 Lmol-1cm-1(λmax=346.5nm) and 25104.5 Lmol-1cm-1(λmax=347nm) .They were a kind of more efficient UV absorbers ，compared with the traditional UV absorber UV-P(εmax=16177.7 Lmol-1cm-1，λmax=338.5nm) .

Abstract:PAE/St/BA copolymer emulsion has been prepared with unsaturated PAE resin, styrene and butyl acrylate by means of emulsion polymerization in the presence of ammonium persulfate as initiator, Tween-80 and OP-10 as emulsifier. The structure and properties of the copolymer were studied by FT-IR, TGA, Zeta potential measurement and particle size analyzer, static contact angle and SEM. The effect of the dosage of unsaturated PAE resin on properties of the copolymer were discussed in the paper. The results show that the excellent performance and good sizing effects of PAE/St/BA copolymer emulsion were achieved when the reaction conditions are as follows: the dosage of unsaturated PAE resin is 3% in polymerization and the dosage of the surface sizing agent was 0.6%.

Abstract:Al2O3 material with cribrate tubular structure was prepared by absorbent cotton as moldboard through immersion method and was clipped chemically by HBr acid solution of different concentration. The catalyst Al2O3-AlBrx with controlled activity, adjustable specific surface area and different feature was prepared successfully, and was characterized by scanning electronic microscope and X-ray diffraction. Results show that the catalyst good copy the macroscopic and microscopic structure of cotton fiber and shows the characteristics of obvious biological morphology. Under lighting condition, we found that Al2O3-AlBrx-3 is available for the oxidation of alcohol to corresponding aldehyde, ketone or acid with higher conversion and selectivity using air as an oxidant and proposed a plausible mechanism. Al2O3-AlBrx-3 was recyclable using three times still maintaining high catalytic activity.

Abstract:Acid treated activated carbon was used as a catalyst for heterogeneous catalytic ozonation of cinnamaldehyde to natural benzaldehyde. The effects of the solvents type, dosage of ethanol and activated carbon, ozone flow rate, and ozonation reaction temperature on the reaction of catalytic ozonation of cinnamaldehyde to benzaldehyde on activated carbon were investigated. The results show that the utilization of ozone can be improved by using activated carbon as catalyst, and the utilization of ozone was increased from 53.5% of the ozone alone to 67.4%. The optimal reaction conditions were as follows: ethanol was used as solvent, the mass ratio of ethanol to cinnamaldehyde was 3, oxygen flow rate was 800 mL/min (ozone flow rate was 0.71 g/h ), the mass ratio of activated carbon to cinnamaldehyde was 0.01, reacted at 0 ℃ for 2 h, the yield of benzaldehyde was 44.0%.

Abstract:Volatile flavor components in fried eggs were extracted by head space solid phase microextraction (HS-SPME) and analyzed by gas chromatography-mass spectrometry(GC-MS). A 75μm Carboxen/PDMS, adsorption time of 70min, a temperature of 75℃ were selected as the optimum conditions. This optimized method was applied to analyze a real sample. A total of 50 volatile compounds were identified in fried eggs, including 16 aldehydes (40.588%), 14 nitrogen-containing compounds (23.639%), 8 alcohols (7.156%), 3 hydrocarbons (4.800%), 3 phenols and heterocyclic compounds (1.755%), 3 ketones (0.868%), 3 sulfocompounds(0.563%). The relative contents of main volatiles (above 2.5%) were as follows: 2,5-dimethyl-pyrazine, 3-methyl-butanal, methyl-pyrazine, nonanal, benzaldehyde, (E,E)-2,4-decadienal, octanal, 2-methyl-butanal, (E)-2-decenal, 3,7-dimethyl-1,6- octadiene, 1-octen-3-ol, et al.

Abstract:The volatile flavor compounds in “Guoxi” bacon were analyzed by simultaneous distillation extraction (SDE), and the gas chromatography-mass spectrometry (GC-MS). A total of 105 volatile compounds were identified and qualified, which belonged to several classes of chemical: 19 hydrocarbons (8.8797%), 27 aldehydes (59.9407%), 14 alcohols (4.3951%), 14 aldehydes (3.1665%), 6 esters (2.7785%), 13 phenols (7.1139%), 2 ethers (2.4567%) and 9 nitrogen- or sulfur-containing or heterocyclic compounds (3.0769%). Aldehydes, phenols, sulfur-containing cmpounds, nitrogen-containing cmpounds, and heterocyclic compounds probably played important roles in the flavor of bacon.

Abstract:Arraillaria mellea was hydrolyzed with the enzyme hydrolytic in which papain and celluclase were added simultaneously. The conditions of extraction were screened with the content of α-amino nitrogen and sensory evaluation as marker by one-factor experiment and oahogonal experiment designed. Having established optimal hydrolyzing condition: ratio of celluclase and papain1:5, temperature 55℃, pH7.0 for 5 hours.

Abstract:H4SiW12O40/SiO2 exhibited excellent catalytic for synthesis of 4-Phenyl-6-Methyl-5-Ethoxycarbonyl -3,4-Dihydro -pyrimidin-2(H)-one via one-pot Biginelli reaction from benzaldehyde, ethyl acetoacetate, urea and anhydrous ehanol as soivent.The effects of reaction on the yield of the product were investigated and the optimum conditions were determined as follows: under the condition of fixed benzaldehyde consumption is 0.04mol n(benzaldehyde):n(ethylacetoacetate):n(urea)= 1:1.5:1.5,the quantity of catalyst was 2.0% quantity of the feed stock , reaction temperature was 90℃, and reaction time was 1.0h .The yield of the product was up to 71.7%.The 3,4-Dihydropyrimidin-2(H)-one were characterized by melting point measure ments,IR 1HNMR and MS spectroscopy.

Abstract:The modified soluble starch has been prepared by two-step method, and then used it treating with pickled goat skin and filling to wet-chromed goat skin. Research found that the optimal conditions of the first step modification are: 85℃, w (HCl) 25%, 60 min; The optimal conditions with Fenton oxidation are: c(H2O2)0.10 mol/L，c(Fe2+) 0.10 mol/L, 40℃ and 60 min. The modified soluble starch by two-step method has certain tanning property which can improve the shrinkage temperature of pickled goat skin as high as 19.7℃, and its carboxyl and carbonyl contents can reach 2.07% and 4.73%, respectively. The leather filled by modified soluble starch gets obvious thickening effect (thickening as high as 14.81%). Through the physical-mechanics tests, the leather samples also conform to the industry standard.

Abstract:p-Fluorobenzyl amine was prepared using p-fluorobenzaldehyde, ammonia and hydrogen gas as raw materials, ethanol as solvent and Raney Ni as catalyst. The pressure of H2 was 1.5-2.0 MPa. The influence of reaction conditions to yield and conversion were under investigation and the optimum condition was determined. The optimum condition is: n(p-fluorobenzaldehyde):n(NH3)=1.0:2.5, w(p-fluorobenzaldehyde):w(ethanol)=1.0:1.3, reaction temperature: 60-65oC, the amount of Raney Ni is 5 wt% of p-fluorobenzaldehyde, reaction time: 7-8 h. Under this condition, the selectivity from p-fluorobenzaldehyde to p-fluorobenzyl amine is 95.3%, the yield is more than 85% and the purity of p-fluorobenzyl amine is >99% after purification.