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Effect of silane functionalized graphene prepared by a supercritical carbon dioxide process on the barrier properties of polyethylene terephthalate composite films

机译：通过超临界二氧化碳方法对聚对苯二甲酸乙二醇酯复合膜阻挡性能制备硅烷官能化石墨烯的影响

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摘要

In this work, a simple and eco-friendly strategy to modify graphene nanoplatelets (GNs) with different silane coupling agents using a supercritical carbon dioxide (Sc-CO2) process has been presented, and effect of the modified GNs on the oxygen transmission rate (OTR) and water vapor transmission rate (WVTR) of GN/PET composite films was studied. FT-IR, SEM, EDX and TG results indicated that Sc-CO2 process was an effective strategy to modify GNs with silane coupling agents. Addition of the modified GNs into PET matrix could greatly decrease the OTR and WVTR values of the GNs/PET composite films, and the WVTR of GNs560/PET composite film and OTR of GNs550/PET composite film were respectively decreased about 90.08% and 58.04%, as compared to those of GNs/PET composite film. It is found that the gas barrier property of GN/PET composites was attributed to not only the tortuous path effect caused by GNs themselves and the interfacial interaction, but also the affinity of binding bonds between GNs and the polymer to the gas molecules. It is believed that this work provided a strategy to design and prepare CN/polymer composites with high barrier properties.
机译：在这项工作中，已经提出了一种简单而环保的策略，用于修饰使用超临界二氧化碳（SC-CO2）工艺的不同硅烷偶联剂的石墨烯纳米键（GNS），并对改性的GNS对氧传输速率的影响（研究了GN / PET复合薄膜的OTR）和水蒸气透射率（WVTR）。 FT-IR，SEM，EDX和TG结果表明SC-CO2过程是用硅烷偶联剂修饰GNS的有效策略。将改性的GNS加入PET基质可以大大降低GNS / PET复合膜的OTR和WVTR值，而GNS560 / PET复合膜的WVTR分别降低约90.08％和58.04％ ，与GNS / PET复合膜相比。发现GN / PET复合材料的气体阻隔性归因于GNS本身和界面相互作用引起的曲折路径效应，也归因于GNS本身和界面相互作用，还归因于GNS与聚合物与气体分子之间的结合键的亲和力。据信，该工作提供了一种设计和制备具有高屏障性质的CN /聚合物复合材料的策略。

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  • 来源
    《RSC Advances》 |2019年第38期|共8页
  • 作者

    Wei Jiajia; Peng Shigui; Xue Bin; Yang Zhao; Qin Shuhao; Yu Jie; Xu Guomin;

  • 作者单位

    Guizhou Univ Dept Polymer Mat &

    Engn Coll Mat &

    Met Guiyang 550025 Guizhou Peoples R China;

    Guizhou Univ Dept Polymer Mat &

    Engn Coll Mat &

    Met Guiyang 550025 Guizhou Peoples R China;

    Natl Engn Res Ctr Compounding &

    Modificat Polymer Guiyang 550014 Guizhou Peoples R China;

    Natl Engn Res Ctr Compounding &

    Modificat Polymer Guiyang 550014 Guizhou Peoples R China;

    Guizhou Univ Dept Polymer Mat &

    Engn Coll Mat &

    Met Guiyang 550025 Guizhou Peoples R China;

    Guizhou Univ Dept Polymer Mat &

    Engn Coll Mat &

    Met Guiyang 550025 Guizhou Peoples R China;

    Guizhou Univ Dept Polymer Mat &

    Engn Coll Mat &

    Met Guiyang 550025 Guizhou Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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