Self-assembled films formed at the air-water interface from CTAB/SDS mixtures with water-soluble polymers.
Self-assembled films formed at the air-water interface from CTAB/SDS mixtures with water-soluble polymers.
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CTAB/SDS 混合物与水溶性聚合物在空气-水界面形成自组装膜。
DOI：
10.1021/la802854d
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Edler KJ
中科院分区：
文献类型：
--
作者：
Edler KJ
我们研究了在含有中性水溶性聚合物和十六烷基三甲基溴化铵（CTAB）和十二烷基硫酸钠（SDS）的阴阳离子表面活性剂混合物的溶液中在空气-溶液界面处形成的固体介观结构薄膜的自发自组装。使用中子反射率、X射线反射率、非镜面时间分辨散射和掠入射衍射来探测形成过程和结构。比较了采用不同阳离子/阴离子表面活性剂摩尔比的聚环氧乙烷、聚乙烯亚胺和聚丙烯酰胺制备的薄膜的介观结构。结果表明，与表面活性剂相互作用较弱的聚合物会引起耗尽聚集过程，从而形成层状相，而与表面活性剂相互作用较强的聚合物会在薄膜中产生更复杂的介观结构。
We have investigated the spontaneous self-assembly of solid, mesostructured films that form at the air−solution interface on solutions containing a neutral water-soluble polymer and catanionic surfactant mixtures of hexadecyltrimethylammonium bromide (CTAB) and sodium dodecylsulphate (SDS). The formation processes and structures were probed using neutron reflectivity, X-ray reflectivity, off-specular time-resolved scattering, and grazing incidence diffraction. The mesostructures of films prepared with polyethylene oxide, polyethylenimine, and polyacrylamide at various cationic/anionic surfactant molar ratios are compared. The results suggest that polymers having a weak interaction with the surfactants cause a depletion aggregation process that results in a lamellar phase, whereas polymers having a stronger interaction with the surfactants produce more complex mesostructures in the films.