4-甲基-5-羟乙基-噻唑-十八酸酯的合成、表征及成膜性能研究

Synthesis and Monolayer Behaviors of 4-methyl-5-hydroxy-ethyl Isothiazole Stearic Ester

合成了一种新型两亲分子 4 甲基 5 羟乙基 噻唑 十八酸酯 (以下简写为HISE) ,利用FTIR ,1 HNMR ,MS等手段对其进行了表征 ,并研究了在不同pH值的亚相溶液中HISE单分子膜的形成 ,通过表面压 分子面积等温线 (π A)的测定 ,发现随着亚相pH值的增加 ,单分子膜的崩溃压升高 ,HISE的成膜性能逐渐增强 ,单分子膜从膨胀型向压缩型转变。通过对微分曲线dπ/dA -A的分析 ,研究了不同pH值的亚相中HISE单分子膜的不可压缩性和相变过程。结果表明 ,碱性介质中HISE单分子膜具有良好的稳定性和不可压缩性。

4-methyl-5-hydroxy-ethyl isothiazole stearic ester(HISE) was synthesized and characterized by FTIR spectroscopy, H-1 NMR and MS. The monolayer-forming ability of HISE was studied in subphases with different pH values using isotherms of surface pressure-area per molecule (pi-A). It was observed that the collapse pressure and the film-forming ability of the monolayers of HISE increased gradually as pH values ascended. Research of differentiated pi-A curves (dpi(/dA - A) indicated that there were one or two phase change points during the compressing process, and the incompressibility and the stability of HISE monolayers on alkalescent subphases were better than on acid subphases.