新型阻燃剂磷酸单（2—羟基丙基）酯及其锑合物的合成

以环氧丙烷、磷酸为原料合成了磷酸单（２－羟基丙基）酯，并以磷酸单（２－羟基丙基）酯和三氧化二锑为原料合成了磷酸单（２－羟基丙基）酯锑。实验结果表明，以丙酮为溶剂、反应温度为３０℃、反应时间为２ｈ，在催化作用下，磷酸单（２－羟基丙基）酯的收率为７２％；磷酸单（２－羟基丙基）酯锑的合成条件为以二甲基亚砜为溶剂、反应时间为４ｈ，产品的收率为８２％。将两种产品作为阻燃剂添加到环氧树脂中，添加量为１５％时，其氧化指数分别为２３．７和２６．８。     

基于薄层黑磷的电化学传感器研究进展

自2014年首次被报道以来,层状黑磷作为一种新型的二维纳米材料受到了广泛的关注与研究。层状黑磷具有比表面积大、带隙结构可调、载流子迁移率高、生物相容性好及易修饰等特点,是一类潜在的理想生物传感材料。本文将关注层状黑磷在电化学传感器中的应用,根据检测目标物的类型,对最新的研究报道进行了详细分类与讨论,主要包括气体分子、生物小分子、其他小分子、生物大分子、细胞几大类基于层状黑磷构筑的电化学传感器。重点概述了层状黑磷及其复合纳米材料的制备方法与性质,传感器的结构、工作原理与分析性能等。最后讨论了黑磷基纳米材料在电化学传感器中应用的现存问题和未来发展方向,为进一步拓展黑磷纳米材料在分析传感领域的应用提供了参考。     

REMOVAL OF ETHANOL FROM CONTINUOUS FERMENTATION BROTH BY PERVAPORATION

In the process of continuous fermentation with pervaporation(PVAP),ethanol can be removed and concentrated simultaneously from the broth. In this work, two kinds of modified PDMS (polydimethylsiloxane) membranes used for PVAP have been tested, the characteristics and kinetics of the process were investigated, and a set of kinetic equations has been derived along with the experimental results. The results show some major advantages of this process over that with ultrafiltration, more concentrated ethanol can be obtained from the broth directly; no appreciable fouling on the membrane and the process can be controlled steadily.     

单硬脂酸稀土及双硬脂酸稀土的合成

本文研究了单硬脂酸稀土和双硬脂酸稀土的合成方法，并对产品的熔点、红外光谱、稀土含量等理化指标进行了测试。     

碱式羧酸稀土热稳定剂及其协同效应的研究

制备了碱式双月桂酸稀土、碱式单月桂酸稀土、碱式单硬脂酸稀土和环烷酸稀土 ,对各稀土产品进行了热稳定性研究 ,发现碱式双月桂酸稀土的热稳定性最好 ,其长期热稳定性与有机锡接近。用碱式双月桂酸稀土与硬脂酸锌进行复配 ,发现具有很好的协同效应     

Synthesis of antimony tris(mercaptoethyl carboxylates) as thermal stabilizer for plyvinyl chloride

A novel type of thermal stabilizers-antimony tris(mercaptoethyl carboxylates)(Sb(SCH2 CH2OOCR)3),was synthesized from carboxylic acid,antimony trioxide and 2-mercaptoethanol in two steps.The experimental results show that the molar ratio of carboxylic acid to antimony tris(2-hydroxyethyl mercaptide)is 1.2,when adding 0.6% tetra-n-butyl titanate as catalyst and xylene as isotropic solvent,heating and refluxing for about 2-4h.The thermal stability was measured by heat-aging oven test.The thermal stability time is about 8-40ming(at 200℃）when adding 2% tetra-n-butyl titanate in polyvinyl chloride(PVC).Among these stabilizers,antimony tris(mercaptoethyl stearate)has best thermal stability.Its thermal stability is better than that of Ca-Zn complex and basic lead stabilizers,and equal to that of organotin.In addition.the stabilization mechanism of this kind of stabilizers for PVC was discussed briefly.     

α—淀粉酶的超滤研究

对用超滤法浓缩分离α－淀粉酶过程进行了研究，讨论了料液浓度，膜面液体流速，操作压力等因素对超滤过程的影响。实验结果表明，用醋酸纤维素超滤浓缩α－淀粉酶的过程可用扩散模型来描述，超滤时宜控制压力在０．３－０．４ＭＰａ范围内。用超滤法能有效地浓缩α－淀粉酶，酶的总回收率大于９０％。此外，通过实验建立了分离过程的传质醋酸为超滤法浓缩α－淀粉酶的工业设计提供了依据。     

PVC热稳定剂三(月桂酸巯基乙酯)锑的合成

研究合成了一种新型聚氯乙烯（ＰＶＣ）热稳定剂－三（月桂酸巯基乙酯）锑,实验结果表明：当反应物月桂酸与三（２－羧基乙硫醇）锑的用量比为１．１：１．０时,以钛酸丁酯作催化剂,二甲苯为带水剂,加热反应回汉４ｈ,得到了三（月桂酸巯基乙酯）锑的产率为７８．８％;并用热老化的方法测试了其对ＰＶＣ的热稳定性,当三（月桂酸巯基乙酯）锑的添加量为２ｐｈｒ时,ＰＶＣ树脂的热稳定时间为２０ｍｉｎ（２００℃）。     

新型PVC热稳定剂—三（羟基乙硫醇）锑的合成

研究了一种充醇锑类热稳定剂－三（羟基乙硫醇）锑的合成及其应用,实验时以三氧化二锑和巯基乙醇为原料,采用一步法直接化合生成三（羟基乙硫醇）锑。此外,探讨了反就耦葩应物配比、反应时间等因素对产率的影响。实验结果表明：以二甲苯作为带水剂尖物Ｓb２Ｏ３与６ＨＳＣＨ２ＣＨ２ＯＨ的量比为１：１．２,加热回流１．０h,得产品的收率为 ９３．８％;三（羟基乙硫醇）锑为 黄色液体,其折光率Ｄn＾２０为１．４４７９;当     

Estimation of surface tension of organic compounds using quantitative structure-property relationship

A novel quantitative structure-property relationship (QSPR) model for estimating the solution surface tension of 92 organic compounds at 20 °C was developed based on newly introduced atom-type topological indices. The data set contained non-polar and polar liquids, and saturated and unsaturated compounds. The regression analysis shows that excellent result is obtained with multiple linear regression. The predictive power of the proposed model was discussed using the leave-one-out (LOO) cross-validated (CV) method. The correlation coefficient (R) and the leave-one-out cross-validation correlation coefficient (R _CV) of multiple linear regression model are 0.991 4 and 0.991 3, respectively. The new model gives the average absolute relative deviation of 1.81% for 92 substances. The result demonstrates that novel topological indices based on the equilibrium electro-negativity of atom and the relative bond length are useful model parameters for QSPR analysis of compounds.