Self-assembly of poly(ethylene glycol)-poly(alkyl phosphonate) terpolymers on titanium oxide surfaces: synthesis, interface characterization, investigation of nonfouling properties, and long-term stability.
Self-assembly of poly(ethylene glycol)-poly(alkyl phosphonate) terpolymers on titanium oxide surfaces: synthesis, interface characterization, investigation of nonfouling properties, and long-term stability.
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DOI：
10.1021/la902110j
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发表时间：
2010-01
期刊：
影响因子：
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通讯作者：
V. Zoulalian;S. Zürcher;S. Tosatti;M. Textor;S. Monge;J. Robin
中科院分区：
文献类型：
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作者：
V. Zoulalian;S. Zürcher;S. Tosatti;M. Textor;S. Monge;J. Robin
这一贡献涉及三元共聚物在氧化钛（TiO(2)）表面的自组装。在链转移剂的作用下，将不同的甲基丙烯酸酯（烷基膦化、丁基和PEG甲基丙烯酸酯）聚合得到聚合物结构。所得聚磷酸烷基酯聚乙二醇（peg）材料在TiO(2)界面上自组织，主要通过SEC和NMR进行表征。AR-XPS显示膦酸基团与TiO(2)底物结合，并在体系的最外层形成peg刷层。在pH为2、7.4和9的溶液中暴露3周后，用XPS和椭偏法定量评价了该三元共聚物胶合层的稳定性。与参考自组装系统相比，我们证明了该涂层在与水溶液接触时抗解吸的整体稳定性改进。最后，当暴露于全血清中时，PEG-terpolymer adlayer被证明赋予TiO(2)底物防污性能。
This contribution deals with the self-assembling of a terpolymer on titanium oxide (TiO(2)) surface. The polymer structure was obtained by polymerization of different methacrylates, i.e., alkyl-phosphonated, butyl and PEG methacrylate, in the presence of a chain transfer agent. The resulting PEG-poly(alkyl phosphonate) material, characterized mainly by SEC and NMR, self-organized at the interface of TiO(2). AR-XPS demonstrated the binding of phosphonate groups to TiO(2) substrate and the formation of a PEG-brush layer at the outermost part of the system. The stability of this terpolymer adlayer, after exposure to solutions of pH 2, 7.4, and 9 up to 3 weeks, was evaluated quantitatively by XPS and ellipsometry. We demonstrated an overall stability improvements of this coating against desorption in contact with aqueous solutions in comparison with reference self-assembly systems. Finally, the PEG-terpolymer adlayer proved to impart to TiO(2) substrate antifouling properties when exposed to full blood serum.