Photochemical attachment of polymer films to solid surfaces via monolayers of benzophenone derivatives
Photochemical attachment of polymer films to solid surfaces via monolayers of benzophenone derivatives
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DOI：
10.1021/ja990962
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发表时间：
1999-09-29
影响因子：
15
通讯作者：
Frank, CW
中科院分区：
文献类型：
--
作者：
Prucker, O;Naumann, CA;Frank, CW
我们报告了一种简单而有效的方法，光化学附着薄聚合物层的固体表面。该系统是基于光反应性二苯甲酮衍生物，通过硅烷锚结合到二氧化硅表面。然后用聚合物膜覆盖该基底，该聚合物膜通过用UV光（λ> 340 nm）照射而与二苯甲酮部分反应。作为光化学反应的结果，聚合物的薄层共价结合到表面。通过萃取除去未附着的聚合物。作为例子，我们已经成功地附着了聚（苯乙烯）和聚（乙基恶唑啉）的薄层。该层的厚度是照射时间和聚合物分子量的函数。膜厚度随着用于附着的聚合物的回转半径线性增加。使用这个系统，我们能够光化学连接到16纳米厚的聚（苯乙烯）膜。
We report a simple and yet effective way to photochemically attach thin polymeric layers to solid surfaces. The system is based on a photoreactive benzophenone derivative that is bound to SiO2 surfaces via a silane anchor. This substrate is then covered with a polymer film that is reacted with the benzophenone moieties by illumination with UV light (lambda > 340 nm). As a result of the photochemical reaction, a thin layer of the polymer is covalently bound to the surface. Nonattached polymer is removed by extraction. As examples, we have successfully attached thin layers of poly(styrene) and poly(ethyloxazoline). The thickness of the layer is a function of the illumination time and the molecular weight of the polymer. The film thickness increases linearly with the radius of gyration of the polymers used for attachment. Using this system, we were able to photochemically attach up to 16 nm thick films of poly(styrene).