Controlling Surface Segregation of a Polymer To Display Carboxy Groups on an Outermost Surface Using Perfluoroacyl Groups,Langmuir

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Controlling Surface Segregation of a Polymer To Display Carboxy Groups on an Outermost Surface Using Perfluoroacyl Groups
Langmuir ( IF 3.7 ) Pub Date : 2018-05-10 00:00:00 , DOI: 10.1021/acs.langmuir.8b00638
Keisuke Nishimori ₁ , Shigeru Kitahata ₁ , Takashi Nishino ₁ , Tatsuo Maruyama ₁

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Controlling the surface properties of solid polymers is important for practical applications. We here succeeded in controlling the surface segregation of polymers to display carboxy groups on an outermost surface, which allowed the covalent immobilization of functional molecules via the carboxy groups on a substrate surface. Random methacrylate-based copolymers containing carboxy groups, which were protected with perfluoroacyl (R_f) groups, were dip-coated on acrylic substrate surfaces. X-ray photoelectron spectroscopy and contact-angle measurements revealed that the R_f groups were segregated to the outermost surface of the dip-coated substrates. The R_f groups were removed by hydrolysis of the R_f esters in the copolymers, resulting in the display of carboxy groups on the surface. The quantification of carboxy groups on a surface revealed that the carboxy groups were reactive to a water-soluble solute in an aqueous solution. The surface segregation was affected by the molecular structure of the copolymer used for dip-coating.

中文翻译：

控制聚合物的表面分离以使用全氟酰基在最外面的表面上显示羧基

控制固体聚合物的表面性质对于实际应用很重要。我们在这里成功地控制了聚合物的表面偏析，使其在最外层的表面上显示出羧基，从而允许功能分子通过底物表面上的羧基进行共价固定。用全氟酰基（R _f）基团保护的，含羧基的无规甲基丙烯酸酯基共聚物浸涂在丙烯酸基材表面上。X射线光电子能谱和接触角测量表明，R _f基团被隔离到浸涂衬底的最外表面。通过水解R _f除去R _f基团共聚物中的丙烯酸酯，导致在表面上显示羧基。表面上羧基的定量表明，羧基对水溶液中的水溶性溶质具有反应性。表面偏析受到用于浸涂的共聚物的分子结构的影响。

更新日期：2018-05-10

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