碳纳米颗粒形貌对聚乙烯复合材料性能影响的正电子湮没研究  

Effect of carbon nanoparticles morphology on the properties of polyethylene composites investigated by positron annihilation lifetime spectroscopy

作　　者：高洁[1] 周振豪 梅佳明 韩小兵 GAO Jie;ZHOU Zhen-hao;MEI Jia-ming;HAN Xiao-bing(Hubei Key Laboratory of Radiation Chemistry and Functional Materials,School of Nuclear Technology and Chemistry&.Biology,Hubei University of Science and Technology,Xianning 437100,China)

机构地区：[1]湖北科技学院,辐射化学与功能材料湖北省重点实验室,核技术与化学生物学院,湖北咸宁437100

出　　处：《精细与专用化学品》2024年第2期13-19,共7页Fine and Specialty Chemicals

基　　金：湖北省教育厅科研计划中青年人才项目(Q20222802);大学生创新创业训练计划(S202310927008);湖北科技学院教研重点项目(2023XZ013);湖北科技学院博士启动基金(BK202003)。

摘　　要：在高性能聚合物纳米复合材料的构筑中,为了实现碳纳米颗粒的精准选择,揭示碳纳米颗粒形貌对聚合物复合材料微观结构及宏观性能的影响十分必要。采用热压法制备了富勒烯、碳纳米管、石墨烯和炭黑等不同形貌碳纳米颗粒填充改性的聚乙烯复合材料,并利用正电子湮没寿命谱探讨了碳纳米颗粒形貌对复合材料自由体积特性的影响。此外,系统地研究了碳纳米颗粒形貌对聚乙烯复合材料流变、力学、电学和热学性能的影响,并将形貌对宏观性能的影响与复合材料自由体积分数的变化进行了关联。To achieve precise selection of carbon nanoparticles for the construction of highe performance polymer nanocoposites,it was very necessary to reveal the effect of carbon nanoparticles morphology on the microstructure and properties of polymer composites.In this work,fullerene,carbon nanotubes,graphene and carbon black incorporated polyethylene(PE)composites were prepared with hot pressing,and the effect of carbon nanoparticles morphology on the microstructure(free volume characteristics)of the PE nanocomposites was probed with positron annihilation lifetime spectroscopy.In addition,the effect of carbon nanoparticles morphology on the rheological,mechanical,electrical and thermal properties of the PE nanocomposites was systematically investigated,and the morphology effect on the properties was correlated with the free volume fraction change of the obtainedPEnanocomposites.

关 键 词：碳纳米颗粒 形貌 正电子湮没 微观结构 性能 

分 类 号：TQ327[化学工程—合成树脂塑料工业] O632.12[理学—高分子化学]