一种含全氟壬烯基硅表面活性剂的制备

Preparation and Surface Activity of A Silicon Surfactant

摘要:

研究了2-甲基-2-全氟壬烯氧基乙氧基羰基乙基甲基二聚乙氧基硅烷（V）的制备方法和表面活性。以甲基丙烯酸-2-全氟壬烯氧基乙基酯（I）和甲基二氯硅烷（II）为原料，在氯铂酸催化下经过硅氢化反应得到2-甲基-2-全氟壬烯氧基乙氧基羰基乙基甲基二氯硅烷（III），III与聚乙二醇（IV）缩合反应得到非离子表面活性剂V。用FTIR和MS对其结构进行了表征，优化了硅氢化反应工艺条件，测试了V水溶液的表面张力和临界胶束浓度(CMC)。中间体III的较优合成条件为: 以四氢呋喃为溶剂，n (I ): n (II) = 1∶1.2，50 篊下反应24 h，收率68.0 %。表面活性剂V水溶液的临界胶束浓度为0.22 g/L，此时的表面张力为19.5 mN/m，表明V是高活性氟硅表面活性剂。

Abstract:

Preparation and surface activity of 2-methyl-2-perfluorononenyloxyethoxycarbonyl ethyl- methyldipolyethoxylsilicane (V) were investigated. 2-methyl-2-perfluorononenyloxyethoxycarbonyl ethyl methyldichlorosilicane (III) was synthesized from 2-perfluorononenyloxyethyl methacrylate （I）and methyldichlorosilicane (II) by hydrosilication in the presence of H2PtCl6. III reacted with polyglycol （IV）to give non-surfactant V which was characterized by FTIR and MS. its surface activities were investigated. The critical micelle concentration (CMC) of aqueous solution of V was 0.22 g/L, surface tension of which at CMC (γcmc) was 19.5 mN/m. The reaction conditions of hydrosilication were optimized. n (I ): n (II) = 1∶1.2, I and II reacted in THF at 50℃ in the presence of 20 ppm H2PtCl6 for 24h to give III at yield 68.0%. V is a fluorosilicon surfactant with high activity.