Abstract:The present work presents a study on the grafting of polyurethane onto chitosan in aqueous media. The effects of the amount of hydrophilic monomer on the water resistance of polyurethane were observed. Characterization of graft copolymers was performed by Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction analysis (XRD), mechanical properties testing, and water resistance testing. TGA tests revealed that the thermal decomposition temperature of the copolymers increased significantly, being 34 ºC higher than that of pure gelatin while DSC measurements indicated that the glass transition temperature decreased by the introduction of polyurethane. Accordingly, the mechanical and anti-water absorption properties also proved to be enhanced greatly as evidenced by mechanical test and water absorptions data in which the copolymers containing 50% of polyurethane have highest elongation at break (325.6%), and lowest water absorption capacity (65%).

Abstract:Taking paraffin as phase change material, MCM-41 mesoporous silica materials as carrier, the paraffin/MCM-41 composite phase change thermal energy storage materials were synthesized successfully via solution immersion. The morphology was observed by scan electron microscopy (SEM), transmission electron microscopy (TEM) images and clearly revealed the structure of molecular sieves and paraffin/MCM-41. The synthesized materials were characterized by thermal gravimetry/differential scanning calorimeter (TG-DSC). The results verified the good thermal stability of the synthesized material. FT-IR results confirmed that the paraffin was incorporated into the framework of mesoporous materials. The results showed that the paraffin’s maximum of PCM was 40%wt, phase change temperature was 66.6℃, phase change latent heat was 135.3J/g; there is no reaction between the paraffin and the silicon dioxide, paraffin was imbedded into the net of silicon dioxide The form-stable paraffin/MCM-41 composite PCM was considered as an effective latent heat thermal energy storage material due to good thermal reliability and good chemical compatibility.

Abstract:The international performance and oil displacment were studied. Results showed that the CMC values were in the range of from 10-5 to 10-6 mol/L. The time expending to equilibrium interfacial tension extended with the increase of Geminis concentration. As the spacer length increased, the interfacial tension first increased to a certain point and then decreased. The Geminis displayed outstanding salt resistance. 2C13-C2-2C2SO4Na can enhance 5% EOR after water flooding as oil displacement agent in core flooding experiment.

Abstract:A kind of asymmetric twin-tailed cationic surfactant has been synthesized by acylation and quaternization using N,N-dimethyl propyl diamine, bromote-tradecane and carboxylic acid as the starting materials. The structures of the intermediate products and the title products were characterized by means of IR and 1H NMR. The optimum conditions for acylation were as follows: n(caprylic acid)﹕n(N,N-dimethyl propyl diamine) = 1﹕1.1，temperature of oil bath was 120℃ and react time was 10h. The surface tension could decrease to 20～30mN•m-1 and the critical micelle concentration (cmc) was found to be 10-5～10-6mol•L-1, which were all far lower than those of the corresponding traditional quaternary ammonium salt. The foam half time was 22～31min. The foam of the asymmetric twin-tailed cationic surfactants was steadier than that of the traditional quaternary ammonium salt.

Abstract:A novel polymeric dispersant (SMG) was prepared by modifying copolymer of styrene and maleic anhydride (SMA) with the epoxypropyl trimethyl ammonium chloride (ETA) through interface reaction. Fourier transforms infrared spectroscopy (FTIR) indicated that the epoxy groups had reached with the anhydride groups. 30.96% anhydride groups in SMA was taken part in the reaction when molar ratio of ETA to SMA was about 1.3, mass ratio of p-toluene sulfonic acid to SMA was 14%, the reaction temperature was 78℃ for 6 h. SMG can be used as dispersant for carbon black and showed an excellent dispersing ability when modification degree was higher than 14%, the mass ratio of SMG to carbon black was about 7%, and pH value was about 9. The prepared carbon black dispersion had an excellent stability to temperature, which the change rate of particle size was only about 3.6% when it was treated at 60℃ for 24 h. The zeta potentials of carbon black dispersed by SMG was about 28.16mv when pH value was 3, and was taking some negative charges when pH value was higher than 6.5.

Abstract:The surface chemical properties, water solubility and synergy were studied on the mixed systems based on OMDAB and sodium dodecyl sulfate(SDS), OMDAB and dodecylbenzenesulfonate acid sodium (LAS), OMDAB and betaine.The results showed that mixed solution is stable, and surface chemical properties remarkably enhanced in a certain range of concentration. Determined by the application of the complex system performance, complex system, part of the application performance than a single system, different degrees of increase, which was the role of synergistic effects.

Abstract:The effect of the pretreatment conditions on enzymatic digestibility was discussed with Bamboo (Sinocalamus affinis) Refiner mechanical pulp (RMP) as the feedstock soaking in two different solutions, ammonia and potassium hydroxide, ammonia and potassium phosphate. The optimum pretreatment conditions of ammonia and potassium hydroxide were determined as follows：reaction temperature 120℃, solid to liquid ratio (mass/volume)1:6 g/mL, pretreatment time 3.5h, ammonia charge 70%(g/g oven dry, the same below), potassium hydroxide charge 5%.Under such conditions, the recovery ratio of cellulose, hemicelluloses and the delignification ratio can reach 90.66%, 92.90 % and 41.05%, respectively. The reducing sugar yield and conversion yield of cellulose can attain 23.95% and 44.61% respectively under the condition of per gram of pretreatment feedstock loaded with 20 FPU after enzymatic hydrolysis for 24 h at acetic acid sodium buffer solution of pH 4.8 and reaction temperature 50℃.The conversion yield of cellulose can attain 56.95%, but the recovery ratio of cellulose can reach 74.59% with the method of ammonia and potassium phosphate. The loss of the cellulose ratio is larger than the ammonia and potassium hydroxide pretreatment method.

Abstract:The paper studied preparation of L-rhamnose by two-steps biotransformation of naringin using naringinase and rest cells of yeast as catalyst. The optimum conditions of hydrolysis was the concentration of naringin at 14g/L, 10mL/L of naringinase, pH at 5.5, reaction time of 22h. The optimum conditions of fermentation was the yeast dosage 2.5g/L, the temperature at 32 ℃, pH at 6.0, fermentation time of 120min. A small-scale pilot was carried out in 30L fermentor, 85.6g crystals of rhamnose with more than 98.5% purity was get. The result was the theoretical yield of 86.5%.

Abstract:Microwave-assisted solvent extraction (MASE) essential oils from Homalomena Occulta. The chemical composition of the oil was identified using GC/MS technique. The optimum conditions are obtained: petroleum ether as solvent, the microwave power 600W, extraction temperature 60℃, extraction time 25min. 63 constituents were identified total and The main chemical constituents were Linalool (23.411%), 7-Acetyl-2-hydroxy-2-methyl -5- isopropylbicyclo[4.3.0]nonane (5.222%), 4-Terpineol (3.971 %). Comparison with the conventional hydro-distillation (HD), it was found that MASE save time and higher yield but no significant differences of the chemical composition. Therefore, MASE was a complete substitute for HD, high efficiency and energy savings technology.

Abstract:The purification technology of the total isoflavones from red clover was studied with a method of acid-base and water-precipitation.In the paper,the effect of alkaline solution,acid settling and the amount of water were investigated.By the orthogonal test L9(33),the optimal purification conditions are as follows:pH 8.5 of alkaline solution,pH 2.5 of Acid settling，six times of the amount of water.Under the best conditions the content of the total isoflavones from red clover can reach 50％．

Abstract:This paper deals with the vacuum batch distillation experiment by the multivariable parameters’ strategy for rectifying the crude 4-piperdinone generated from the reaction of acetone and liquid ammonia. The purity of the 4-piperidinone product obtained by batch distillation is up to 98.6%( Gas chromatographic analysis) and its first yield was over 64%. And by-product, the mixture of 4-Methyl-3-penten-2-one and 4-Methyl-4-Penten-2-one, which was produced from the same reaction as above, was enriched over to 98%(by GC-MS ).The experiment showed that it is viable to rectifying the 4-piperdinone by distillation instead of re-crystallization, which was much longer separation process and complicated jobs .

Abstract:As a pre-treatment unit for preparing solar-grade silicon, hydrometallurgical route could remove most metallic impurities in silicon dioxide (SiO2) and raise the final product yield. Acid leaching of SiO2 could reduce the cost and energy consumption of industrialized development. Combined with high purity of reducing agent, the successor process of pyrometallurgy can also achieve “continuous casting”. Factors such as the mass fraction of leaching agent, time, the particle size of SiO2, and the liquid-solid ratio were investigated, and the samples were characterized by ICP-OES, SEM, etc. The optimal reaction conditions were as follows: w(HF) = 2%, w(H2C2O4) = 3%, w(HNO3) = 30%, reaction time 4h, the average size of SiO2 powder particle 100 mesh ~ 120 mesh, the liquid-solid ratio 4:1, and room temperature 30℃. It was found that the final removal rates of Fe, Al, Ca, P impurities could reach 99.99%, 14.02%, 73.27%, 60.00% respectively and the mass fraction of total amount of impurities could be reduced to 1.465×10-4.

Abstract:The target compound-alibendol(Ⅰ) was prepared via allylation, oxida-tion with NaClO2 and NH2SO3H, esterification，Claisen rearrangement and ami-nolysis reaction from 2-hydroxy-3-methoxybenzaldehyde. The yield is 71.9% in the overall five steps. Some intermediates and target product were identified by 1H NMR and MS.

Abstract:Acrylic acid (AA)/ammonium allylpoly(ethylene glycol) sulfate (AS10, 10 is the degree of polymerization of polyethylene glycol) copolymers, as non-phosphorus antiscalants for calcium-phosphate precipitation, were synthesized by using of AA and AS10 monomers and ammonium persulfate initiator. The copolymer of AA/AS10 was characterized by FT-IR. Through single factor test, the optimal synthetic conditions were obtained as follows: mass ration of AS10 to AA was 2:1, dose of initiator accounted for 3% of the total monomer mass, reaction temperature was 80 ℃, and polymerization time was 1.5 h. The influence of dose of AA/AS10 on calcium-phosphate inhibition was also investigated. It was shown there is a threshold dose and approximately 92% calcium-phosphate inhibition when the dose of AA/AS10 is 6 mg•L-1. Scanning electron microscope (SEM) images showed the application of AA/AS10 inhibitor significantly decreased the size of calcium-phosphate solids thereby dispersing through water.

Abstract:For the reaction system of cyclohexene oxidation product epoxy cyclohexane by hydrogen peroxide, Using the technology of macroporous resin to adsorption and separation 1,2-Cyclohexanediol in reaction aqueous solutions. In basis of the self-made absorption column, the results showed that the better conditions for adsorption and separation 1,2-cyclohexanediol in reaction aqueous solutions by AB-8 resin were: sample flow rate 1.0 mL/min, bed height 4.0 cm, normal temperature. The rate constants, correlation coefficients, adsorption capacity and kinetic parameters, which were calculated through mathematical models, can be used to describe the adsorption kinetics of 1,2-Cyclohexanediol by AB-8 resin well. The better conditions of desorption using ethyl acetate were: elute rate 1.0 mL/min, normal temperature. The absorption rate and desorption rate of AB-8 resin can still reach persantage of 80 after recyling five loops.

Abstract:In the absence of solvent, a kind of carboxyl modified polyether organosilicon UV absorber(CPE-MUVS)was prepared. The chemical structure of CPE-MUVS was characterized by IR, 1H-NMR and Ultraviolet spectrum. Then,CPE-MUVS was emulsified to obtain the transparent emulsion. It was found that the average diameter and the Zeta potential of the emulsion were 33.08nm and -41.24mV, respectively by the Malvern nanometer particle-size and the Zeta potential analyzer. The application study of the compounded system ASO-1/CPE-MUVS was carried out with cotton fabric. The results indicated that ASO-1/CPE-MUVS could improve the UV-absorbing performance of the fabric. Meanwhile, CPE-MUVS could obviously decrease the bending stiffness, increase the water-absorbing of the fabric and had no influence on the whiteness of the fabric.

Abstract:Abstract: The synergistic effects on flame retardancy and smoke suppression of the cotton fabric flame retarded with cyclic phosphonate ester MCPPE were discussed in this paper. The results showed that the LOI of flame retardant cotton with MCPPE increased from 43% to 52% as adding 0.4 g/L bismuth oxide in MCPPE flame retardant finishing agent. Damaged carbon length shortened to 5cm, vertical flame reached B1 level and for breaking strength the influence was not strong. Thermogravimetric analysis showed that bismuth oxide further reduced the initial decomposition temperature and maximum pyrolysis temperature. SEM showed the char of the burned cotton was denser after adding bismuth oxide and bismuth oxide had obvious resistance to deformation capacity. Cone test showed that bismuth oxide not only reduced the total heat release rate of flame retardant cotton fabrics but lowered total smoke yield 60%.

Abstract:Cationic fluorinated waterborne polyurethane (WCFPU) emulsion containing perfluoroalkyl side chain was prepared by the reaction of isophorone isocyanate (IPDI), polyether polyol (PTMG1000), N - methyldiethanolamine (MDEA), 1,4 - butanediol (BDO), trimethylol propane (TMP) and modified by 2-(perfluorooctyl) ethyl alcohol (FEOH). The structure of the polymer and performance of the film were characterized by fourier transform infared spectrometer (IR), thermogravimetric analysis (TGA), and the cationic fluorinated waterborne polyurethane was used as paper water and oil-resistant agent, the contact angle of water and liquid paraffin and the fiber morphology of sized paper surface were also investigated. The results showed that during the process of casting films, the fluorinated group stretched on the interface exterior of the air and the polymer, which could beneficial to form low energy surface and protect the inner molecule of the polymer effectively; and the films were provided with excellent heat resistance property. And the excellent water and oil-resistant property was reached when the concentration was 0.3 wt%, the contact angle of water was 134.7°,the contact angle of liquid paraffin was 119.2°.

Abstract:A kind of petroleum sulfonate (PS) was synthesized by distillate of Shengli crude oil and Salt tolerant properties and interfacial tension of blend systems of petroleum sulfonate and different carbon chain aliphatic alcohol ether sulfonate (AnESO, EO=3，n=1214,16,18) were investigated. Results showed that: (1) the PS solutions had very poor salt tolerance. Precipitation occurred when the sodium chloride content reached 30g/L, or calcium chloride content reached 0.15g/L. The interfacial tension between crude oil and surfactant solutions is higher than 10-1 mN?m-1. (2) Salt tolerant ability was enhanced for blend systems with ω(PS) :ω(AnESO) = 9:1 than PS. Salt tolerant (sodium chloride) could reach 70g/L, 60g/L and 80g/L, while for calcium chloride 2g/L, 1.8g/L and 2.4g/L, respectively. (3) Interfacial tension of blend systems of PS/A18ESO could reach 10-2 mN?m-1 range under the optimal salinity.

Abstract:(S)-( )-Pinanediol-1-chloro-3-methylbutyl-1-boronate, was synthesi zed from 2-methylpropylboronic acid by a two-step way including esterification and homologation with an overall yield of about 87.3%. Single-factor experiments were conducted to optimize the reaction condition. ( )-Pinanediol-2-methylpropyl-1- boronate was synthesized in n-hexane under reflux temperature，for 3h in 98.3% yield. (S)-( )-Pinanediol-1-chloro-3-methylbutyl-1-boronate was prepared in 88.8% yield under the condition of -78℃, n(( )-Pinanediol-2-methylpropyl-1-boronate):n(LDA): n(ZnCl2)＝1:2:1.7 in 3h. GC/MS, 1HNMR are properly used for the characterization of the structures of the product.

Abstract:(R)-1-Ferrocenylethyldimethylamine (III) was synthesized from acetylferrocene via a hydrogenative amination catalyzed with Pd/C and chemical resolution with (R)-(+)-tartaric acid. Lithiation of III with n-BuLi and following phosgenation with ClPPh2 provided (R)-N, N-dimethyl-(S)-1-(2-diphenylphosphinoferrocenyl)ethylamine (IV); (R) -1-[(S)-2-(diphenylphosphino)ferrocenyl]ethyldi(3,5-dimethylphenyl)phosiphine (VIII) was obtained by treatment of IV with freshly prepared di(3,5-dimethylphenyl)phosphine through a configurationally retentive displacement in an overall yield of 19.5% calculated from acetylferrocene, The ee of which was about 95% according to the chiral HPLC analysis.

Abstract:Tridentate chelating agents containing pyridine rings were synthesized by click chemistry with alkyne (c) and azide (d) which are the derivatives of bis(pyridin-2-ylmethyl)amine. The cold labeling yields of the compounds synthesized by the three nitrogen atoms in these tridentate chelating agents and fac-[Re(CO)3(H2O)3]+ were more than 90 %, and the total yields were over 75 %, comparable to the yields of the compounds synthesized by fac-[Re(CO)3]+ and the tridentate chelating agents containing carboxyl, amino-group and nitrogen atom (N3) in the triazol ring which synthesized from 2-aminopent-4-ynoic acid were more than 90 % and 82 %. The tridentate chelating agents analogues which contain different pyridine rings and triazole compounds which contain amino and carboxyl could be potential radiolabeling ligands for fac-[188Re(CO)3(H2O)3] + as the bifunctional chelating agents.

Abstract:3,4,5-trimethoxyphenyl acetic acid is an important intermediate for preparation of Mivacurium Chloride, was synthesized from 3,4,5-trimethoxybenzaldehyde by dichlorocarbene reaction and reduction reaction. The optimum reaction conditions are as follows: (1)The dichlorocarbene reaction: n(3,4,5-trimethoxybenzaldehyde): n(chloroform)=1:3, sodium hydroxide solution w=40%, reaction time 7h,reaction temperature 60℃,3,4,5-trimethoxybenzaldehyde dosage 0.1mol and 2g Hexadecyl trimethyl ammonium Bromide (CTMBA)/polyvinyl alcohol-600(PEG-600)(1:1) as the phase transfer catalyst(PTC). The yield of 3,4,5-trimethoxymandelic acid was 71.7%. (2) The reduction reaction: n(3,4,5-trimethoxymandelic acid): n(Trimethylchlorosilane): n(sodium iodide):n(zinc) =1:1.2:1.2:3, “one-pot” reaction at 80℃for 5h, the yield of target product was 91.0%. The overall yield was reached to 65.2%. The structures of the target compound were confirmed by IR and 1H-NMR.