有机硅表面活性剂在乙醇-水体系中的起泡机制研究

doi:10.3969/j.issn.1001-1803.2021.02.001

日用化学工业 ›› 2021, Vol. 51 ›› Issue (2): 83-88.doi: 10.3969/j.issn.1001-1803.2021.02.001

• 基础研究 • 下一篇

有机硅表面活性剂在乙醇-水体系中的起泡机制研究

牛奇奇(),白艳云,台秀梅,王万绪,王国永()

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

收稿日期:2020-04-14 修回日期:2021-01-11 出版日期:2021-02-22 发布日期:2021-02-22
通讯作者: 王国永
作者简介:牛奇奇（1994-）,山西人,硕士研究生,E-mail： 872561215@qq.com。
基金资助:
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)

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

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

Received:2020-04-14 Revised:2021-01-11 Online:2021-02-22 Published:2021-02-22
Contact: Guo-yong WANG

摘要/Abstract

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。

关键词: 乙醇-水溶液, 泡沫, 表面张力, 界面弹性

Abstract:

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.

Key words: ethanol-aqueous solution, foam, surface tension, interfacial elasticity

中图分类号:

TQ423

牛奇奇,白艳云,台秀梅,王万绪,王国永. 有机硅表面活性剂在乙醇-水体系中的起泡机制研究[J]. 日用化学工业, 2021, 51(2): 83-88.

NIU Qi-qi,BAI Yan-yun,TAI Xiu-mei,WANG Wan-xu,WANG Guo-yong. Study of the foaming mechanism of a silicone surfactant in ethanol-aqueous system[J]. China Surfactant Detergent & Cosmetics, 2021, 51(2): 83-88.

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表面活性剂	临界胶束浓度/（mg·L^-1）		最低表面张力/（mN·m^-1）
表面活性剂	水溶液	50%乙醇-水溶液	水溶液	50%乙醇-水溶液
FC-7160	141.4	43.1	24.0	22.8
AES-3	191.2	—	28.0	—
AEO-9	20.8	—	30.4	—
CAB	66.5	—	27.8	—

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

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