有机硅表面活性剂在乙醇-水体系中的起泡机制研究  

Study of the foaming mechanism of a silicone surfactant in ethanol-aqueous system

作　　者：牛奇奇 白艳云 台秀梅 王万绪 王国永 NIU Qi-qi;BAI Yan-yun;TAI Xiu-mei;WANG Wan-xu;WANG Guo-yong(Key Laboratory of Surfactant of China National Light Industry,China Research Institute of Daily Chemistry Co.,Ltd.,Taiyuan,Shanxi 030001,China)

机构地区：[1]中国日用化学研究院有限公司,中国轻工业表面活性剂重点实验室,山西太原030001

出　　处：《日用化学工业》2021年第2期83-88,共6页China Surfactant Detergent & Cosmetics

基　　金：国家自然科学基金资助项目(21872088);国家重点研发计划课题资助(2017YFB0308704);伽蓝研究基金资助项目(JALA 2017)。

摘　　要：对有机硅表面活性剂FC-7160和几种典型的碳氢表面活性剂在50%(体积分数,下同)乙醇-水溶液中的泡沫结构、含液量和液膜的表面弹性进行了研究。结果表明,和水溶液相比,FC-7160在50%乙醇-水溶液中的气泡较小且为近圆形,且含液量较高;碳氢表面活性剂在50%乙醇-水溶液中形成的液膜扩张模量为0 mN/m,没有表面弹性,所以其泡沫产生之后立即消失;而FC-7160在50%乙醇-水溶液中的表面弹性较高,在液膜处的分子排列更为紧密,一方面增大了表面黏度,另一方面提高了液膜强度,所以其在50%乙醇-水溶液中的泡沫具有一定的稳定性。The structure and liquid content of the foams,and the surface elasticity of films of a silicone surfactant FC-7160 and several hydrocarbon surfactants in 50%ethanol-aqueous media were studied.The results showed that,compared with the situation in water,the bubbles of FC-7160 in mixed solvent of 50%ethanol-water were smaller and nearly spherical,and the liquid content was higher;the dilatational modulus of hydrocarbon surfactants in aqueous ethanol solution were 0 mN/m,indicating that the foam films had no surface elasticity in 50%ethanol-aqueous media.However,the surface elasticity of FC-7160 in 50%ethanol-aqueous media was high,indicative of a more compact molecular arrangement which not only increased the surface viscosity but also enhanced the liquid film strength,so FC-7160 could form stable foam in the 50%ethanol-aqueous media.

关 键 词：乙醇-水溶液 泡沫 表面张力 界面弹性 

分 类 号：TQ423[化学工程]