物理化学学报 >> 2000, Vol. 16 >> Issue (04): 325-330.doi: 10.3866/PKU.WHXB20000407

研究论文 上一篇    下一篇

维生素C对表面活性剂体系相行为的影响

郭荣, 于卫里, 张晓红   

  1. 扬州大学化学系,扬州 225002
  • 收稿日期:1999-07-19 修回日期:1999-09-28 发布日期:2000-04-15
  • 通讯作者: 郭荣

Effect of VC on the Phase Behavior of Surfactant System

Guo Rong, Yu Wei-Li, Zhang Xiao-Hong   

  1. Chemistry Department,Yangzhou University,Yangzhou 225002
  • Received:1999-07-19 Revised:1999-09-28 Published:2000-04-15
  • Contact: Guo Rong

摘要:

维生素C(VC)能提高表面活性剂十六烷基三甲基溴化铵(CTAB)在水中的溶解度 ,具有助溶作用 ;且能提高n-C5H11OH在O/W微乳液中的增溶量和水在W/O微乳液中的增溶量 ,O/W与W/O微乳液区域同时扩大 ,具有助溶-增溶作用.VC的助溶作用与助溶-增溶作用均具有一定的选择性 ,只对阳离子表面活性剂CTAB体系有效. VC助溶-增溶作用的机理是同时增加W/O和O/W微乳液的稳定性和层状液晶向双连续结构微乳液的转化.

关键词: 维生素C, 助溶, 助溶-增溶, 微乳液, 层状液晶

Abstract:

Vitamin C is found to show hydrotrope action and enhance the aqueous solubility of surfactant CTAB it also show the hydrotrope-solubilization action to increase the solubilzed amount of n-C5H11OH in O/W microemulsion and that of water in W/O microemulsion. Both action of VC are selective so that they can only be effective in cationic surfactant CTAB system. The mechanism of the hydrotrope-solubilization action of VC is in fact to increase the stability of W/O and O/W microemusion and the structural transition from the lamellar liquid crystal phase to the bicontinuous structure.

Key words: Vitamin C, Hydrotrope, Hydrotrope-solubilization, Microemulsion, Lamellar liqued crystal