可聚合阳离子含氟表面活性剂的合成与性能研究

Synthesis and properties of cationic polymerized fluorosurfactants

摘要:

本文以全氟烷基乙基醇（PFEA）为原料，设计合成了三种不同含氟链段长度的可聚合阳离子含氟表面活性剂—N-（乙酸全氟烷基乙基酯）-N-（乙醇丙烯酸酯）二甲基溴化铵（PFDM），通过核磁共振氢谱（1H NMR）对其结构进行了表征。利用Zeta电位测定、表面张力测定等手段考察了不同含氟链段长度对PFDM表面活性等的影响，并证明了PFDM的可聚合性。结果表明，随含氟链段的增长PFDM在水介质中形成胶束的胶束聚集数逐渐增大，CMC呈指数下降，表面活性逐渐增强，且具有良好的可聚合性。

Abstract:

The cationic polymerized fluorosurfactants, N-(perfluoroalkyl acid ethyl ester)-N-(ethyl alcohol acrylate) dimethyl bromide(PFDM), with different length of fluorocarbon chain were synthesized using perfluoroalkyl ethyl alcohols(PFEA) as raw materials. The structures of the products were identified by means of 1H NMR. The influence of the length of fluorocarbon chain on the properties of PFDM was studied by zeta potential measurement and surface tension method, and the polymerizability of the PFDM was proved. The results show that the aggregation numbers of micells and the surface activity of PFDM increase with the increasing of the length of fluorocarbon chain, the CMC of PFDM declines exponentially with the increasing of the length of fluorocarbon chain, and PFDM has good polymerizability.