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P4VP Modified Zwitterionic Polymer for the Preparation of Antifouling Functionalized Surfaces

机译:P4VP改性两性离子聚合物用于制备防污功能化表面

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摘要

Zwitterionic polymers are suitable for replacing poly(ethylene glycol) (PEG) polymers because of their better antifouling properties, but zwitterionic polymers have poor mechanical properties, strong water absorption, and their homopolymers should not be used directly. To solve these problems, a reversible-addition fragmentation chain transfer (RAFT) polymerization process was used to prepare copolymers comprised of zwitterionic side chains that were attached to an ITO glass substrate using spin-casting. The presence of 4-vinylpyridine (4VP) and zwitterion chains on these polymer-coated ITO surfaces was confirmed using 1H NMR, FTIR, and GPC analyses, with successful surface functionalization confirmed using water contact angle, X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM) studies. Changes in water contact angles and C/O ratios (XPS) analysis demonstrated that the functionalization of these polymers with β-propiolactone resulted in hydrophilic mixed 4VP/zwitterionic polymers. Protein adsorption and cell attachment assays were used to optimize the ratio of the zwitterionic component to maximize the antifouling properties of the polymer brush surface. This work demonstrated that the antifouling surface coatings could be readily prepared using a “P4VP-modified” method, that is, the functionality of P4VP to modify the prepared zwitterionic polymer. We believe these materials are likely to be useful for the preparation of biomaterials for biosensing and diagnostic applications.
机译:两性离子聚合物由于其更好的防污性能而适合替代聚(乙二醇)(PEG)聚合物,但是两性离子聚合物的机械性能较差,吸水性强,因此均聚物不能直接使用。为了解决这些问题,使用可逆加成断裂链转移(RAFT)聚合工艺来制备由两性离子侧链组成的共聚物,该两性离子侧链通过旋铸连接到ITO玻璃基板上。使用1H NMR,FTIR和GPC分析确认了这些聚合物涂覆的ITO表面上存在4-乙烯基吡啶(4VP)和两性离子链,并通过水接触角,X射线光电子能谱(XPS)证实了成功的表面官能化,和原子力显微镜(AFM)研究。水接触角和C / O比(XPS)分析的变化表明,这些聚合物与β-丙内酯的官能化作用导致亲水性混合4VP /两性离子聚合物。使用蛋白质吸附和细胞附着测定法来优化两性离子组分的比例,以使聚合物刷表面的防污性能最大化。这项工作表明,可以使用“ P4VP改性”方法(即P4VP改性制备的两性离子聚合物的功能)轻松制备防污表面涂料。我们认为这些材料可能对制备用于生物传感和诊断应用的生物材料很有用。

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