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首页> 外文期刊>Journal of Materials Science >Novel polyimide nanocomposites enhanced by covalent modified graphene nanosheets based on Friedel-Crafts reaction
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Novel polyimide nanocomposites enhanced by covalent modified graphene nanosheets based on Friedel-Crafts reaction

机译：基于Friedel-Crafts反应的共价改性石墨烯纳米液增强新型聚酰亚胺纳米复合材料

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摘要

We report a new approach to fabricate novel polyimide (PI) nanocomposites using amine-functionalized graphene nanosheets (AGNS). AGNS was successfully prepared by Friedel-Crafts (F-C) reaction and nitroreduction. The PI nanocomposites with outstanding strength and high tribological performance were obtained though in situ polymerization in the presence of different contents of AGNS. The thermal stability, mechanical performance, and the tribological properties of PI/AGNS nanocomposites were significantly enhanced compared with that of pristine PI and PI/graphene nanosheets (GNS) blends, resulting from the strong covalent bonds between AGNS with PI matrix. Particularly, given that the friction coefficient and wear rate were reduced separately by 20.5% and 90.5% under dry sliding condition, the PI/AGNS nanocomposite with 0.5wt% AGNS manifested the optative friction performance. The combined exclusive friction resistance and mechanical performance were the paramount factors which illustrate the applications of the resultant PI/AGNS nanocomposites in the wear-resistant field or another high-performance material.
机译：我们通过胺官能化石墨烯纳米片（AGN）报告了制造新型聚酰亚胺（PI）纳米复合材料的新方法。 AGNS成功由Friedel-Crafts（F-C）反应和硝化制作。虽然在AgN的不同含量存在下，获得了具有突出强度和高摩擦学性能的PI纳米复合材料。与原始PI和Pi /石墨烯纳米片（GNS）混合物相比，PI / AGNS纳米复合材料的热稳定性，机械性能和摩擦学特性显着提高，由AGN与PI基质之间的强的共价键产生。特别是，鉴于在干滑动条件下摩擦系数和磨损率分别减少20.5％和90.5％，具有0.5wt％AGN的PI / AgNS纳米复合体表现为摩擦性能。合并的专属摩擦阻力和机械性能是说明所得PI / AGNS纳米复合材料在耐磨性场或另一种高性能材料中的应用的最重要因素。

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  • 来源
    《Journal of Materials Science》 |2019年第7期|共14页
  • 作者

    Min Chunying; Liu Dengdeng; He Zengbao; Qian Jiamin; Song Haojie; Jia Wei; Zhang Kan;

  • 作者单位

    Jiangsu Univ Res Sch Polymer Mat Zhenjiang 212013 Jiangsu Peoples R China;

    Jiangsu Univ Res Sch Polymer Mat Zhenjiang 212013 Jiangsu Peoples R China;

    Jiangsu Univ Res Sch Polymer Mat Zhenjiang 212013 Jiangsu Peoples R China;

    Jiangsu Univ Res Sch Polymer Mat Zhenjiang 212013 Jiangsu Peoples R China;

    Shaanxi Univ Sci &

    Technol Sch Mat Sci &

    Engn Xian 710021 Shaanxi Peoples R China;

    Jiangsu Univ Res Sch Polymer Mat Zhenjiang 212013 Jiangsu Peoples R China;

    Jiangsu Univ Res Sch Polymer Mat Zhenjiang 212013 Jiangsu Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
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