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首页> 外文期刊>RSC Advances >From starch to polylactide and nano-graphene oxide: fully starch derived high performance composites
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From starch to polylactide and nano-graphene oxide: fully starch derived high performance composites

机译：从淀粉到聚丙根和纳米石墨烯氧化物：完全淀粉衍生的高性能复合材料

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摘要

A delicate closed-loop strategy for valorization of starch to value-added products was developed. Carbon sheets, formed of carbon spheres, were obtained by microwave-assisted hydrothermal degradation of starch and then further transformed into nano-sized graphene oxide (nGO, 20 x 30 nm(2)) under oxygen-rich acidic conditions. The synthesized nGO exhibited self-assembly in solution. Furthermore, nGO strongly attached to the surface of starch granules by hydrogen bonding (nGO@ starch, 0.1 wt%) and allowed easy and highly efficient interfacial engineering in PLA/starch composites. After combining with polylactide (PLA), the composites could incorporate up to 30 wt% nGO@ starch, while retaining excellent properties. nGO was capable of facilitating PLA crystallization in the composites by providing a number of nucleation sites. Moreover, the interfacial adhesion between PLA and starch was significantly improved by nGO. Though its content was extremely low, nGO improved the mechanical and barrier properties and thermal stability of the PLA/starch composites. The results demonstrate a facile route to value-added starch-derived nGO and further to fully starch derived high performance PLA/starch biocomposites.
机译：开发了一种精细闭环，用于纳米淀粉对增值产品的储值。由碳球形成的碳板通过微波辅助水热降解淀粉获得，然后在富氧酸性条件下进一步转化为纳米尺寸的石墨烯氧化物（NGO，20×30nm（2））。合成的非政府组织在溶液中表现出自组装。此外，NGO通过氢键（NGO @淀粉，0.1wt％）强烈地附着在淀粉颗粒表面上，并在PLA /淀粉复合材料中允许容易且高效的界面工程。结合聚物（PLA）后，复合材料可以包含高达30wt％的NGO @淀粉，同时保持优异的性能。通过提供多种成核位点，NGO能够促进复合材料中的PLA结晶。此外，NGO通过PLA和淀粉之间的界面粘附显着改善。尽管其含量极低，但是NGO改善了PLA /淀粉复合材料的机械和阻挡性能和热稳定性。结果证明了增值淀粉衍生的非政府组织的容易途径，并且进一步用于完全淀粉衍生的高性能PLA /淀粉生物复合材料。

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  • 来源
    《RSC Advances》 |2016年第59期|共10页
  • 作者

    Wu Duo; Xu Huan; Hakkarainen Minna;

  • 作者单位

    Royal Inst Technol KTH Sch Chem Sci &

    Engn Dept Fibre &

    Polymer Technol SE-10044 Stockholm Sweden;

    Royal Inst Technol KTH Sch Chem Sci &

    Engn Dept Fibre &

    Polymer Technol SE-10044 Stockholm Sweden;

    Royal Inst Technol KTH Sch Chem Sci &

    Engn Dept Fibre &

    Polymer Technol SE-10044 Stockholm Sweden;

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  • 正文语种 eng
  • 中图分类 化学;
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