树脂固定脂肪酶技术的研究

采用大孔树脂D3520作载体以载体涂布法来固定化脂肪酶,对固定化条件进行了优化并分析固定化酶的性能,在水分含量为3%~5%,pH 9.0,反应温度为40℃条件下,固定化酶具有最佳的催化活力(91.49 U/g).与游离酶相比,固定化酶具有更好的性能.     

Curing mechanism of TDE-85/MeTHPA epoxy resin modified by polyurethane

Diglycidyl 4,5-epoxy tetrahydro phthalate/methyl tetrahydrophthalic anhydride （TDE-85/MeTHPA） epoxy resin modified by polyurethane （PU） was prepared with 1,4-butanediol （1,4-BDO）, trimethylol propane （TMP） and polyurethane prepolymer synthesized by polypropylene glycol and toluene diisocynate. Chemical reaction and curing mechanism of this system were discussed by incorporating the results of infra spectrum analysis. The results indicate that the epoxy polymeric network I is obtained by the curing reaction between TDE-85 and MeTHPA, while the PU polymeric network II is obtained by the chain-extended and crosslinking reaction between 1,4-BDO, TMP and polyurethane prepolymer（PUP）. The graft chemical bonds are formed between polymer networks I and II that therefore increase the degree of blend and compatibility between epoxy polymer and PU.     

大孔吸附树脂精制中药栀子中栀子苷的研究

研究了大孔吸附树脂精制中药栀子中栀子苷的工艺条件,以栀子苷含量为考察指标,比较了不同吸附树脂、吸附流速、洗脱流速等因素对精制栀子苷的影响,表明HPD-100树脂精制栀子苷的最佳工艺条件:吸附流速为2.0 mL/min,洗脱流速为1.0 mL/min,梯度洗脱,收集30%乙醇水溶液洗下来的洗脱液,干燥后,得到纯度为90.75%的栀子苷产品。此工艺可较好地精制中药栀子中的重要有效成分栀子苷,为工业化生产提供了方法依据。     

低熔点合金在树脂传递模塑中的应用

介绍了树脂传递模塑(RTM)和低熔点合金模具的特点,论述了低熔点合金模具熔芯成型对低熔点合金的要求以及低熔点合金的研究现状.     

水蒸汽活化树脂炭用做双电层电容器电极材料

以热固性酚醛树脂为前驱体，采用水蒸汽为活化剂，通过改变活化时间，制备出了一系列双电层电容器用活性炭（PFR（1—5））．采用低温氮气吸附法测定BET比表面积和孔结构，发现随着活化时间的增加，活性炭的比表面积和中孔率增大．电化学测试表明，用活化时间为5h的PFR5H制备的模拟EDLC的比电容，在有机体系中50mA／g恒流放电比电容达106．5F／g，1000mA／g下放电仍保持99．7F／g，仅衰减了6．4％，具有良好的倍率特性．交流阻抗谱测试结果显示PFR5H的内阻最低，具有良好的电容性能和功率特性．     

Influence of Surface Modification on Tribo-Performance of Hybrid Glass/PTFE Fabric Composite with Phenolic Resin Binder

The fabric/phenolic composites with the pure and silanized hybrid glass/PTFE fabric were prepared by dip-coating of the hybrid glass/PTFE fabrics in a phenolic resin. The friction and wear performances of the resulting fabric composites were evaluated using pin-on-disc wear tester. The composition change of the glass fabric in hybrid glass/PTFE fabric after silanization was analyzed by FTIR spectroscopy. The morphologies of the composite structures and the worn surfaces of the composites were analyzed by means of scanning electron microscopy (SEM). The results show that the fabric/phenolic composite with the β-aminoethyltrimethoxylsilane silanized hybrid glass/PTFE fabric can obtain the highest load-carrying capacity and the best wear-resistance, followed by the composite with γ-glycidoxypropyltrimethoxysilane silanized hybrid glass/PTFE fabric. Chemical reactions have achieved as the hybrid glass/PTFE fabric was silanized with β-aminoethyltrimethoxyl silane or γ-glycidoxypropyltrimethoxy silane, which contribute to strengthen the bonding strength between the fabric and the adhesive and hence to improve the tribological properties of the hybrid glass/PTFE fabric composites.     

原位聚合法制备石蜡微胶囊的工艺研究

考察了助剂类型和后处理工艺对微胶囊制备的影响。结果表明，表面活性剂的加入会影响微胶囊形成，加入4．0％的表面活性剂得不到微胶囊，而在不加助剂或加入聚乙烯醇时能够得到较高微胶囊化率的微胶囊。制备石蜡微胶囊必须考虑后处理工艺的影响，需依次用热水、乙醇和热石油醚洗涤才能除去未包覆石蜡。通过对微胶囊合成过程的分析表明，要形成石蜡微胶囊，必须使生成的物质具有在石蜡液滴表面富集的能力。尿素和甲醛反应生成的缩聚产物具有一定的表面活性，逐渐移动到两相界面，在水相中进一步反应、沉积，包覆石蜡形成微胶囊。     

甲基丙烯酸正丁酯／甲基丙烯酸羟乙酯共聚树脂研究

采用悬浮聚合法合成了甲基丙烯酸正丁酯、甲基丙烯酸β羟乙酯二元共聚树脂，采用冻胶纺丝技术制备了纤维状共聚物树脂，研究了甲基丙烯酸β羟乙酯含量对树脂饱和吸油率、吸油速率以及充分溶胀后树脂剩余率的影响，分别利用傅立叶变换红外光谱（FTIR）和动态热机械分析仪（DMA）对树脂的化学结构和动态力学性能进行了分析和讨论，利用软件materials studio对甲基丙烯酸正丁酯、甲基丙烯酸β羟乙酯共聚过程中的物理缠结能力进行了模拟预测。     

空心玻璃微珠填充环氧复合泡沫材料的制备及性能表征

通过优化试验，以大量空心玻璃微珠填充环氧树脂体系制备出了密度低、强度高的复合泡沫材料，并对其密度和水下声学性能进行了表征。结果表明，所研制的轻质高强复合泡沫材料密度在0．3～0．5g／cm^3之间，且在高静水压下具有良好声学性能。     

Adsorption of D113 resin for dysprosium(III)

The adsorption behavior and mechanism of D113 resin for Dy(III) was investigated by using the method of resin adsorption. Experimental results show that the optimum medium pH of adsorption of D113 resin for Dy³⁺ is pH=6.00 in the HAc-NaAc medium. The static adsorption capacity of D113 resin for Dy³⁺ is 292.7 mg·g⁻¹. The optimum eluant is 0.5 mol·L⁻¹ HCl. The adsorption rate constant is k ₂₉₈=6.8×10⁻⁶s⁻¹. The apparent activation energy of D113 resin for Dy(III) is 14.79 kJ·mol⁻¹. The adsorption behavior of D113 resin for Dy(III) obeys the Freundlich isotherm. The adsorption parameters of thermodynamic are ΔH=14.48 kJ·mol⁻¹, ΔS=54.69 J·mol⁻¹·K⁻¹, ΔG=−1.82 kJ·mol⁻¹.The adsorption mechanism of D113 resin for Dy³⁺ was confirmed by chemical analysis and IR spectra. Funded by the Natural Science Foundation of Zhejiang Province (No.201027), Foundation of Zhejiang Provincial Education Bureau (No.20040551) and Zhoushan Science Technology Bureau (No.04114)