Abstract The purpose of the study is to prepare of novel oligo-(N-(2-hydroxypropyl) methacrylamide)-g-poly(lactic acid) bottle-brushes with different grafting density on the silicon surface. Firstly, the mixtures of 9-decen-1-ol (DO, functional interconnection molecule) and 1-undecene (UD) molecules were attached to the hydrogen-terminated silicon surface by UV irradiation under molecular self-assembly conditions. Secondary, 4-cyano-4-(propylsulfanylthiocarbonyl) sulfanylpentanoic acid RAFT agent was immobilized onto DO molecules by ester reaction, followed by the interface-mediated RAFT polymerization of pre-synthesized N-[(2-hydroxypropyl) methacrylamide]-g-poly(lactic acid) macromonomer. The systematic control of the RAFT agent-functionalized alkene concentration afforded by the mixed self-assembled monolayers on the silicon surface enabled the grafting density and the average distance between grafting points of the polymer chains to independently control. The phase image taken with atomic force microscopy has shown that the silicon surfaces were coated with the bottle-brushes. Graphical Abstract

中文翻译：

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硅表面低聚瓶刷的接枝密度：混合自组装单层中 RAFT 试剂官能化烯烃的摩尔分数的影响

摘要 本研究的目的是在硅表面制备具有不同接枝密度的新型低聚-(N-(2-羟丙基)甲基丙烯酰胺)-g-聚(乳酸)瓶刷。首先，在分子自组装条件下，通过紫外线照射将 9-decen-1-ol（DO，功能互连分子）和 1-十一烯（UD）分子的混合物连接到氢封端的硅表面。二级，4-氰基-4-（丙基硫代羰基）硫基戊酸 RAFT 试剂通过酯反应固定在 DO 分子上，然后界面介导的 RAFT 聚合预先合成的 N-[（2-羟丙基）甲基丙烯酰胺]-g-poly （乳酸）大分子单体。硅表面混合自组装单分子层提供的 RAFT 试剂官能化烯烃浓度的系统控制使得接枝密度和聚合物链接枝点之间的平均距离能够独立控制。用原子力显微镜拍摄的相位图像表明，硅表面涂有瓶刷。图形概要