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A tertiary amine in two competitive processes: reduction of graphene oxide vs. catalysis of atom transfer radical polymerization

机译:两种竞争过程中的叔胺:将石墨烯氧化物的还原与原子转移自由基聚合的催化

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摘要

Electrically conductive graphene oxide-polystyrene hybrids (GO-PS) were prepared by reduction of graphene oxide (GO) in one step during covalent modification of graphene oxide surface using surface-initiated atom transfer radical polymerization (SI-ATRP) of styrene. The reduction of the GO surface was proven by Raman spectroscopy, electrical conductivity measurements, thermogravimetric analysis and X-ray photoelectron spectroscopy. Electrical conductivity of the synthesized GO-PS particles increased in eight orders of magnitude, depending on the polymerization period. Detailed studies were performed to determine that the tertiary amine, such as N,N,N', N', N '' - pentamethyldiethylenetriamine (PMDETA), used in SI-ATRP as a ligand complexing copper catalyst, was responsible for the GO surface reduction. It was shown that due to participation of PMDETA in reduction of graphene oxide, the ATRP in the presence of GO can proceed only above a certain PMDETA-GO ratio.
机译:通过在使用表面引发的原子转移自由基聚合(Si-ATRP)的苯乙烯的环烯氧化物表面的共价改性期间,通过在一步中还原石墨烯氧化物(GO),制备导电石墨烯氧化物 - 聚苯乙烯杂种杂交种(GO-PS)。 通过拉曼光谱,导电性测量,热重分析和X射线光电子能谱证明了去表面的减少。 合成的GO-PS颗粒的电导率在八个数量级增加,这取决于聚合时间。 进行详细研究以确定在Si-ATRP作为配体络合铜催化剂的Si-ATRP中使用的叔胺,例如N,N,N',N',N'' - 五甲基二甲基三胺(PMDETA),对去表面负责 减少。 结果表明,由于PMDETA的参与在还原石墨烯氧化物中,在存在的情况下,ATRP可以仅进行超过某种PMDeta-GO比。

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  • 来源
    《RSC Advances》 |2015年第5期|共7页
  • 作者单位

    Slovak Acad Sci Inst Polymer Bratislava 84541 45 Slovakia;

    Tomas Bata Univ Zlin Ctr Polymer Syst Univ Inst Zlin 76001 Czech Republic;

    Slovak Acad Sci Inst Polymer Bratislava 84541 45 Slovakia;

    Slovak Acad Sci Inst Polymer Bratislava 84541 45 Slovakia;

    Slovak Acad Sci Inst Polymer Bratislava 84541 45 Slovakia;

    Slovak Acad Sci Inst Chem Bratislava 84538 45 Slovakia;

    Slovak Acad Sci Inst Polymer Bratislava 84541 45 Slovakia;

    Slovak Acad Sci Inst Polymer Bratislava 84541 45 Slovakia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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