Self-Assembly and Functions of Star-Shaped Oligomeric Surfactants
Self-Assembly and Functions of Star-Shaped Oligomeric Surfactants
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星形低聚表面活性剂的自组装及其功能
DOI：
10.1021/acs.langmuir.8b00290
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发表时间：
2018
期刊：
影响因子：
3.9
通讯作者：
Wang Yilin
中科院分区：
文献类型：
--
作者：
Fan Yaxun;Wang Yilin
低聚表面活性剂由三个或更多个两亲性部分组成，这些部分在头基水平上通过间隔基团共价连接。它提供了一种可能的途径，以弥补差距，从传统的单链表面活性剂的聚合物表面活性剂，并导致许多深刻的改进，在水溶液中的表面活性剂的性质，并在空气/水和水/固体界面。通常，低聚表面活性剂根据其间隔基团的拓扑结构分为线型、环状和星形，并且其聚集行为强烈地取决于所得拓扑结构。近年来，我们研究了三聚体、四聚体和六聚体表面活性剂，其星形间隔基从元素氮或碳的中心位置延伸，并且它们的带电头基通过间隔基彼此连接。研究发现，间隔基的性质和齐聚度对低聚表面活性剂的自组装有重要影响，并为通过调节分子构象来制备各种表面活性剂聚集体形态提供了可能。这种独特的自组装行为使其具有上级的物理化学性质和潜在的应用前景。这篇专题文章概述星型低聚表面活性剂的发展，包括在空气/水和水/固体界面的自组装、在水溶液中的自组装，以及它们的功能。我们希望通过这篇综述能够对星型低聚表面活性剂的结构-性能关系及其各种潜在应用有一个全面的了解，并为它们未来的研究提供额外的动力。
Oligomeric surfactants consist of three or more amphiphilic moieties which are connected by spacer groups covalently at the level of headgroups. It provides a possible route to bridge the gap from conventional single-chain surfactants to polymeric surfactants and leads to many profound improvements in the properties of surfactants in aqueous solution and at the air/water and water/solid interfaces. Generally, oligomeric surfactants are categorized into linear, ring-like, and star-shaped on the basis of the topological structures of their spacer groups, and their aggregation behavior strongly depends on the resultant topological structures. In recent years, we studied trimeric, tetrameric, and hexameric surfactants with a star-shaped spacer which spreads from a central site of elemental nitrogen or carbon, and their charged headgroups connect with each other through the spacers. It has been found that both the nature of spacer groups and the degree of oligomerization show important influences on the self-assembly of oligomeric surfactants and provide great possibilities in fabricating various surfactant aggregate morphologies by adjusting the molecule conformations. The unique self-assembly behavior endows them with superior physicochemical properties and potential applications. This feature article summarizes the development of star-shaped oligomeric surfactants, including self-assembly at the air/water and water/solid interfaces, self-assembly in aqueous solution, and their functions. We expect that this review could provide a comprehensive understanding of the structure–property relationship and various potential applications of star-shaped oligomeric surfactants and offer additional motivation for their future research.