新型松香基阳离子Gemini表面活性剂的合成及分析

Synthesis and analysis of novel rosin-based cationic Gemini surfactants

以松香酸、环氧氯丙烷、四甲基丙二胺为原料,通过酯化、季铵盐化反应制备了松香基阳离子双子表面活性剂,产率为70.5%,纯度为95.5%;采用FT-IR对产物结构进行确证;表面活性分析结果表明:临界胶束浓度(CMC)值为4×10-4mol/L,γcmc为37.35 mN/m,pc20为4.45,乳化性能强,泡沫密集且稳定,HLB值约为13.98,属于水包油(O/W)型乳化剂,与阴离子相溶性好。

A rosin-based cationic gemini surfactant is prepared from abietic acid, epichlorohydrin and N, N, N, N- tetramethyl-1,3-propanediamine through esterification and subsequent quaternary ammonium salification. The synthetic yield of the surfactant is 70. 5% with a purity of 95.5%. Its structure is identified by FT-IR. The results of surface activity reveal that the prepared surfactant is a polymeric O/W emulsifier with good emulsifying properties and good compatibility with anions. Moreover, its foam is very dense and stable, and the critical micelle concentration （CMC）, T pc20 ,HLB of the surfactant can reach to 4 ×10-4 mol/L,37.35 mN/m,4.45 and 13.98 ,respectively.