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首页> 外文期刊>Applied Surface Science >A versatile method for the preparation of end-functional polymers onto SiO_2 nanoparticles by a combination of surface-initiated ATRP and Huisgen [3 + 2] cycloaddition
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A versatile method for the preparation of end-functional polymers onto SiO_2 nanoparticles by a combination of surface-initiated ATRP and Huisgen [3 + 2] cycloaddition

机译：通过表面引发的ATRP和Huisgen [3 + 2]环加成反应在SiO_2纳米颗粒上制备末端官能聚合物的通用方法

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摘要

A versatile method was developed for the chain-end functionalization of the grafted polymer chains for surface modification of nanoparticles with functionalized groups through a combination of surface-initiated atom-transfer radical polymerization (ATRP) and Huisgen [3 + 2] cycloaddition. First, the surface of SiO_2 nanoparticles was modified with poly(methyl methacrylate) (PMMA) brushes via the "grafting from" approach. The terminal bromides of PMMA-grafted SiO_2 nanoparticles were then transformed into an azide function by nucleophilic substitution. These azido-terminated PMMA brushes on the nanoparticle surface were reacted with alkyne-terminated functional end group via Huisgen [3 + 2] cycloaddition. FTIR and 'H NMR spectra indicated quantitative transformation of the chain ends of PMMA brushes onto SiO_2 nanoparticles into the desired functional group. And, the dispersibility of the end-functional polymer-grafted SiO_2 nanoparticles was investigated with a transmission electron microscope (TEM).
机译：通过表面引发的原子转移自由基聚合（ATRP）和Huisgen [3 + 2]环加成的组合，开发了一种用于接枝聚合物链的链端官能化的多功能方法，可对具有官能团的纳米粒子进行表面修饰。首先，通过“接枝”方法用聚甲基丙烯酸甲酯（PMMA）刷对SiO_2纳米颗粒的表面进行了改性。然后，通过亲核取代将PMMA接枝的SiO_2纳米颗粒的末端溴化物转变为叠氮官能团。纳米粒子表面上的这些叠氮基封端的PMMA刷通过Huisgen [3 + 2]环加成反应与炔烃封端的官能端基反应。 FTIR和1 H NMR光谱表明PMMA刷的链端在SiO_2纳米颗粒上的定量转化为所需的官能团。并且，用透射电子显微镜（TEM）研究了端官能聚合物接枝的SiO_2纳米颗粒的分散性。

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  • 来源
    《Applied Surface Science》 |2010年第8期|2490-2495|共6页
  • 作者

    J.C. Chen; W.Q. Luo; H.D. Wang; J.M. Xiang; H.F. Jin; F. Chen; Z.W. Cai;

  • 作者单位

    Department of Chemistry and Chemical Engineering, Ankang University, 92 Yucai Road, Ankang 725000, China;

    Department of Chemistry and Chemical Engineering, Ankang University, 92 Yucai Road, Ankang 725000, China;

    Department of Chemistry and Chemical Engineering, Ankang University, 92 Yucai Road, Ankang 725000, China;

    Department of Chemistry and Chemical Engineering, Ankang University, 92 Yucai Road, Ankang 725000, China;

    Department of Chemistry and Chemical Engineering, Ankang University, 92 Yucai Road, Ankang 725000, China;

    Department of Agriculture and Life Sciences, Ankang University, Ankang 725000, China;

    Department of Agriculture and Life Sciences, Ankang University, Ankang 725000, China;

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  • 正文语种 eng
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  • 关键词

    surface modification; atom-transfer radical polymerization (ATRP); cu-catalyzed huisgen 3 + 2 cycloaddition; chain-end functionalization;

    机译：表面改性;原子转移自由基聚合（ATRP）;铜催化的惠更斯[3 + 2]环加成;链端功能化;

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