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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(S3 M)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:S3 M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0.01S/m,复合材料表现出良好的抗静电性能。
Expanded graphite (EG) was prepared by microwave irradiation. EG-CPE-PVC composite powder was prepared by solid state shear milling (S3 M) of EG, CPE and PVC The body and the composite powder are further mixed with PVC, a heat stabilizer and a plasticizer, and the graphene / CPE-PVC composite material is obtained through plasticization and molding. The structure and properties of the composite powders and their composites were characterized by means of particle size analysis, XRD, AFM, SEM and TEM. The results showed that S3 M achieved the smashing and dispersion of the system, the delamination of the EG sheet and the nanocomposite with CPE-PVC. The addition of CPE achieved further delamination of the EG, so that the thickness of the EG sheet reached 1 to 3 layers and reached the goal of graphene EG. When the mass fraction of EG is 3%, the conductivity of graphene / CPE-PVC composites increases exponentially, which is 8 orders of magnitude higher than that of PVC. When the mass fraction of EG exceeds 4%, the conductivity increases again and appears Percolation phenomenon; in the EG mass fraction of 5%, the conductivity of 0.01S / m, the composite material showed good antistatic properties.