Water surface covering of fluorinated amphiphilic triblock copolymers: surface pressure-area and X-ray reflectivity investigations.
Water surface covering of fluorinated amphiphilic triblock copolymers: surface pressure-area and X-ray reflectivity investigations.
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DOI：
10.1021/la0637059
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发表时间：
2007-06
期刊：
影响因子：
--
通讯作者：
Karsten Busse;Chiranjeevi Peetla;J. Kressler
中科院分区：
文献类型：
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作者：
Karsten Busse;Chiranjeevi Peetla;J. Kressler
用表面压-面积法和X射线反射率法研究了阿坝两亲性三嵌段共聚物的单分子膜。三嵌段共聚物由长的聚（环氧乙烷）（PEO）中间嵌段和聚（全氟己基）乙基甲基丙烯酸酯）（PFMA）末端嵌段组成。水不溶性物种的表面压力-面积等温线显示两个假平台。在低表面压力下的平台与文献中观察到的PEO共聚物的伪平台一致。在刷区域的平台可以被分配到水平到垂直重排的整个PFMA链在空气-水界面，这是其次是XR测量。对于水溶性物种与PFMA的量非常低，没有（显着）第二pseudoplateau和没有富集的PFMA在空气-水界面观察。
Monolayers of ABA amphiphilic triblock block copolymers are studied using surface pressure-area and X-ray reflectivity (XR) measurements. The triblock copolymers are composed of long poly(ethylene oxide) (PEO) middle blocks with poly((perfluorohexyl)ethyl methacrylate) (PFMA) end blocks. The surface pressure-area isotherms of water-insoluble species show two pseudoplateaus. The plateau at low surface pressure is consistent with the pseudoplateau observed for PEO copolymers in the literature. The plateau in the brush region can be assigned to the horizontal to vertical rearrangement of whole PFMA chains at the air-water interface, which was followed by XR measurements. For water-soluble species with a very low amount of PFMA no (significant) second pseudoplateau and no enrichment of PFMA at the air-water interface were observed.