类石墨烯/氯化聚乙烯-聚氯乙烯复合材料的制备与性能

Preparation and property of graphene-like/chlorinated polyethylene-polyvinyl chloride composites

  • 摘要: 采用微波辐照法制备了膨胀石墨(EG),利用EG、氯化聚乙烯(CPE)和聚氯乙烯(PVC)的固相剪切碾磨(S3M)制备了EG-CPE-PVC复合粉体,复合粉体进一步与PVC、热稳定剂和增塑剂混匀,经塑化和模压成型得到类石墨烯/CPE-PVC复合材料。用粒度分析、XRD、AFM、SEM和TEM等手段表征了复合粉体及其复合材料的结构与性能。结果表明: S3M实现了体系的粉碎、分散,EG片层的剥离及与CPE-PVC的纳米复合。CPE的加入实现了EG的进一步剥层,使EG片层的厚度达到1~3层,达到了EG的石墨烯化目标。当EG质量分数为3%时,类石墨烯/CPE-PVC复合材料的电导率呈指数上升,与PVC相比提高了8个数量级;当EG质量分数超过4%时,电导率再次激增,出现逾渗现象;在EG质量分数为5%时,电导率达到0.01 S/m,复合材料表现出良好的抗静电性能。

     

    Abstract: The expanded graphite (EG) was prepared by microwave irradiation, through solid state shear milling (S3M) with EG, chlorinated polyethylene (CPE) and polyvinyl chloride (PVC), EG-CPE-PVC co-powders were prepared.The co-powders were then mixed homogeneous with PVC, thermal stabilizer and plasticizer.And the graphene-like/CPE-PVC composites were obtained by plastification and molding.Structure and properties of co-powders and composites were characterized by analysis of particle size and distribution, XRD, AFM, SEM and TEM.Results show that S3M can realize pulverizing, dispersion, exfoliation of EG layer and nano-compounding of EG-CPE-PVC.Further more, the addition of CPE realizes the further exfoliation of EG, which makes the EG thickness reaches to 1-3 layers and achieves the goal of transforming EG to graphene.When the EG mass fraction reaches 3%, compared with PVC, the conductivity of graphene-like/CPE-PVC composites shows exponential rise and increases 8 orders of magnitude, while EG mass fraction is over 4%, the conductivity surges again and appears the percolation phenomenon.When the EG mass fraction reaches 5%, the conductivity is up to 0.01 S/m, and the composites show good antistatic property.

     

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