物理化学学报 >> 2019, Vol. 35 >> Issue (8): 816-828.doi: 10.3866/PKU.WHXB201810060

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表面活性剂溶胀胶束:性能及应用

龚铃堰1,廖广志2,陈权生3,栾和鑫3,冯玉军1,*()   

  1. 1 四川大学高分子研究所,高分子材料工程国家重点实验室,成都 610065
    2 中国石油天然气股份有限公司勘探与生产分公司,北京 100007
    3 中国石油新疆油田分公司实验检测研究院,新疆 克拉玛依 834000
  • 收稿日期:2018-10-29 录用日期:2018-11-26 发布日期:2018-12-03
  • 通讯作者: 冯玉军 E-mail:yjfeng@scu.edu.cn
  • 作者简介:冯玉军,1971年生,研究员、博士生导师。1999年获西南石油大学应用化学工学博士学位,2000-2004年先后在法国科研中心和法国石油研究院从事博士后研究及在法国波城大学担任助理研究员。2004年加入中国科学院成都有机化学研究所,2012年转入四川大学工作。主要从事智能软物质材料的研究
  • 基金资助:
    国家自然科学基金(21773161);国家自然科学基金(U1762218)

Swollen Surfactant Micelles: Properties and Applications

Lingyan GONG1,Guangzhi LIAO2,Quansheng CHEN3,Hexin LUAN3,Yujun FENG1,*()   

  1. 1 Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
    2 PetroChina Exploration & Production Company, Beijing 100007, P. R. China
    3 Research Institute of Experiment and Detection, Xinjiang Oilfield Branch Company, PetroChina, Karamay 834000, Xinjiang Uygur Autonomous Region, P. R. China
  • Received:2018-10-29 Accepted:2018-11-26 Published:2018-12-03
  • Contact: Yujun FENG E-mail:yjfeng@scu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21773161);the National Natural Science Foundation of China(U1762218)

摘要:

溶胀胶束是表面活性剂胶束增溶其它物质后使胶束膨胀的一种胶束状态,因其能显著提高难溶性物质的溶解度而备受关注。针对近年来对溶胀胶束的研究进展,综述了溶胀胶束的最大增溶量、增溶过程以及增溶后形貌尺寸的变化等问题,总结了影响胶束增溶作用的因素,厘清了溶胀胶束与微乳液的异同,介绍了溶胀胶束的应用,展望了其应用前景与发展方向。

关键词: 表面活性剂, 溶胀胶束, 微乳液, 增溶作用

Abstract:

Micelles, a kind of surfactant aggregate formed in water, may be swollen to a generally limited extent upon addition of a liquid hydrophobic compound. Swollen micelles have attracted considerable research attention because they can enhance the solubility of the said hydrophobic compound. The development of swollen micelles is of significant interest in terms of both scientific and industrial applications, such as drug delivery, oil recovery, and soil remediation. While there have been many studies focusing on micellar solubilization, several questions remain unanswered: the capacity to quantitatively solubilize the drug in drug delivery, the interaction between micelles and non-polar oil when microemulsions are not formed, and the differences and similarities between swollen micelles and microemulsions. Comprehensive understanding of and insight into swollen micelles will be helpful to tailor surfactants for industrial applications. Herein, we reviewed the recent progress in the field of swollen micelles in terms of solubilization capacity, solubilization site, micellar morphology, etc. First, the UV spectrophotometry results demonstrate that the solubilization capacity of micelles is related to their molecular structures and surfactant properties. The solubilization is also dependent on the composition and nature of the hydrophobic compounds, the presence of electrolytes, temperature, etc. Second, the solubilization site may be located in the micellar core, the palisade layer of the micelle, the micelle surface, or the hydrophilic shell of the micelle, depending on the property of the solubilized compounds and the morphology of the micelles. In general, the micellar aggregation number increases with increasing oil concentration; high concentration of oil causes the formation of spherical micelles, while high concentration of oil results in ellipsoidal micelles. Furthermore, the micellar size increased gradually with increasing oil concentrations. Finally, the differences and similarities between swollen micelles and microemulsions were clarified. It is believed that microemulsions can be considered as swollen micelles, but there has been some strong evidence that differentiates swollen micelles and microemulsions. Based on our results, we believe that microemulsions can be considered as swollen micelles, but all micellar solutions cannot be swollen to the extent of microemulsions, unless the specific structural requirements and conditions are satisfied. Overall, understanding the properties of swollen micelles and how they transform to microemulsions not only provide theoretical support for practical applications of surfactants, but can also be used to design new surfactants.

Key words: Surfactant, Swollen micelle, Microemulsion, Solubilization