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首页> 外文期刊>Advanced Functional Materials >Surface-Initiated Atom Transfer Radical Polymerization of Oligo(ethylene glycol) Methyl Methacrylate from a Mixed Self-Assembled Monolayer on Gold
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Surface-Initiated Atom Transfer Radical Polymerization of Oligo(ethylene glycol) Methyl Methacrylate from a Mixed Self-Assembled Monolayer on Gold

机译：混合自组装金在表面上的低聚（乙二醇）甲基丙烯酸甲酯的表面引发原子转移自由基聚合

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摘要

This paper describes the in-situ synthesis of an oligo(ethylene glycol)-functionalized polymer brush in which the oligo(ethylene glycol) chains are presented as side-chains from a methacrylate backbone that is anchored to the surface. These polymer "bottle-brushes" have been synthesized by surface-initiated atom transfer radical polymerization (SI-ATRP) of oligo(ethylene glycol) methyl methacrylate (OEGMA) from a mixed self-assembled monolayer (SAM) of an ATRP initiator-functionalized alkane-thiol and a diluent, methyl-terminated thiol. The systematic control of the ATRP initiator surface density afforded by the mixed SAM on gold and the polymerization time enables the polymer chain length and surface density to be independently controlled. Surface plasmon resonance (SPR) spectroscopy of fibronectin (Fn) adsorption on poly(OEGMA) grown from the surface of the mixed SAMs on gold shows that above a threshold solution molar ratio of the ATRP-initiator thiol to methyl-terminated thiol of 0.2, and a dry film thickness of ～ 4 nm, Fn adsorption on the surface-initiated poly(OEGMA) coatings was below the detection limit of SPR. The relatively low surface density of the ATRP initiator required to confer protein resistance to the surface suggests that SI-ATRP may be a viable strategy to create protein resistant polymer brushes on real-world materials.
机译：本文介绍了低聚（乙二醇）官能化聚合物刷的原位合成，其中低聚（乙二醇）链以固定在表面的甲基丙烯酸酯骨架的侧链形式呈现。这些聚合物“刷子”是通过功能化ATRP引发剂的混合自组装单层（SAM）通过低聚乙二醇乙二醇甲基丙烯酸甲酯（OEGMA）的表面引发的原子转移自由基聚合（SI-ATRP）合成的烷硫醇和稀释剂，甲基封端的硫醇。混合SAM在金上提供的ATRP引发剂表面密度和聚合时间的系统控制，可以独立控制聚合物链长和表面密度。从金上混合SAM的表面生长的聚（OEGMA）上吸附的纤连蛋白（Fn）的表面等离振子共振（SPR）光谱表明，ATRP引发剂硫醇与甲基封端的硫醇的阈值溶液摩尔比高于0.2，干膜厚度约为4 nm，Fn在表面引发的OEGMA涂层上的吸附低于SPR的检测极限。使蛋白质对表面具有抗性所需的ATRP引发剂的相对较低的表面密度表明，SI-ATRP可能是在实际材料上创建抗蛋白质聚合物刷的可行策略。

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