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Fabrication of a high-density polyethylene/ graphene composite with high exfoliation and high mechanical performance via solid-state shear milling

机译：通过固态剪切铣削用高剥离和高机械性能的高密度聚乙烯/石墨烯复合材料的制造

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摘要

Due to the high specific area and hydrophobic nature of graphene, it is extremely difficult to fabricate graphene polymer composites without the re-stacking and re-aggregation of graphene sheets, especially when the matrix is a nonpolar polymer, such as high-density polyethylene (HDPE). Applying the solid-state shear milling (S~3 M) technique in preparation of a graphene/HDPE composite, we successfully solved the problems mentioned above. Highly dispersible exfoliated superfine HDPE/ graphene compounding powder was prepared by the S~3 M technique in the solid state. HDPE/graphene composites with high dispersion and high mechanical performance were subsequently prepared via melt-based processing using this compounding powder. Transmission electron microscopy, scanning electron microscopy and wide-angle X-ray diffraction revealed that the graphene sheets exfoliated into individual sheets inside the polymer matrix. Fourier-transform infrared spectroscopy confirmed that new chemical bonds were generated between graphene and HDPE chains after the S~3 M process. Thermal analysis indicated that the interaction between HDPE and graphene was strengthened. The advanced material presents significant increases in yield strength, impact strength and elongation at break compared to conventional melt blending composites and neat HDPE. Tough and strong HDPE/graphene composites are suitable for a wide range of applications. Because of this method's solid-state melting- based processing, which does not require solvent, this approach possesses great potential for large- scale application in industry.
机译：由于石墨烯的高特异性区域和疏水性质，非常难以制造石墨烯聚合物复合材料，而无需重新堆叠和重新聚集石墨烯片，特别是当基质是非极性聚合物，例如高密度聚乙烯（ HDPE）。在制备石墨烯/ HDPE复合材料时，应用固态剪切铣削（S〜3 M）技术，我们成功解决了上述问题。通过固态的S〜3M技术制备高度分散的剥离超细HDPE /石墨烯复合粉末。随后通过使用该配合粉末的基于熔融的加工制备具有高分散体和高机械性能的HDPE /石墨烯复合材料。透射电子显微镜，扫描电子显微镜和广角X射线衍射显示，将石墨烯片剥落成聚合物基质内的单独片材。傅里叶变换红外光谱证实，在S〜3M过程后石墨烯和HDPE链之间产生了新的化学键。热分析表明，加强了HDPE和石墨烯之间的相互作用。与常规熔融共混复合材料和整齐的HDPE相比，先进材料呈现屈服强度，冲击强度和伸长率的显着增加。坚韧和强大的HDPE /石墨烯复合材料适用于各种应用。由于这种方法的固态熔化的加工，这一方法不需要溶剂，这种方法具有巨大的工业中大规模应用的潜力。

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  • 来源
    《RSC Advances》 |2015年第114期|共9页
  • 作者

    Pingfu Wei; Shibing Bai;

  • 作者单位

    State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu 610065 China.;

    State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu 610065 China.;

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