Interaction between block copolymer micelles and azobenzene-containing surfactants: from coassembly in water to layer-by-layer assembly at the interface.
Interaction between block copolymer micelles and azobenzene-containing surfactants: from coassembly in water to layer-by-layer assembly at the interface.
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DOI：
10.1021/la0632068
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发表时间：
2007-01
期刊：
影响因子：
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通讯作者：
Ning Ma;Yapei Wang;Baoyu Wang;Zhiqiang Wang;Xi Zhang;Guang-Jia Wang;Yue Zhao
中科院分区：
文献类型：
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作者：
Ning Ma;Yapei Wang;Baoyu Wang;Zhiqiang Wang;Xi Zhang;Guang-Jia Wang;Yue Zhao
在本文中，我们描述了使用嵌段共聚物胶束，将偶氮AOT，偶氮苯含两亲物具有适合于反胶束形成和制造的胶束/胶束多层膜的结构。有趣的是，发现PS21-PAA 157胶束比PS115-PAA 15胶束可以掺入更多的Azo-AOT分子，这与掺入不带电荷的疏水分子的情况不同。此外，Azo-AOT在PS21-PAA 157胶束中的光异构化速率比在PS115-PAA 15胶束中的快，这可能与Azo-AOT在两种胶束中的聚集态不同有关。紫外-可见光谱表明，Azo-AOT在PS115-PAA 15胶束中呈反胶束状聚集，分散在PS21-PAA 157胶束的核-冠界面。这些包含功能性两亲物的胶束/胶束膜在功能薄膜领域具有很大的潜力。
In this paper, we describe the use of block copolymer micelles to incorporate Azo-AOT, an azobenzene-containing amphiphile having a structure suitable for reverse micelle formation and the fabrication of polyelectrolyte/micelle multilayer films. Interestingly, it is found that the PS21-PAA157 micelles can incorporate more Azo-AOT molecules than the PS115-PAA15 micelles, which is different from the case of incorporation of noncharged hydrophobic molecules. Moreover, Azo-AOT incorporated into the PS21-PAA157 micelles undergoes a faster photoisomerization than in the PS115-PAA15 micelles, which seems to be related to different aggregation states of Azo-AOT in the two micelles. From the data of UV-vis spectra, we can infer that Azo-AOT adopts a reverse micelle-like aggregation state in the PS115-PAA15 micelles and disperses in the interface between the core and corona of PS21-PAA157 micelles. These polyelectrolyte/micelle films incorporating functional amphiphiles have great potential in the field of functional thin films.