GNP和CNT协同增强改性UHMWPE的热性能和力学性能  

Synergistic Enhancement of Thermal and Mechanical Properties of Modified UHMWPE by GNPs and CNTs

作　　者：傅陈超 张润 薛平[1] 贾明印[1] 陈轲[1] FU Chenchao;ZHANG Run;XUE Ping;JIA Mingyin;CHEN Ke(College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学机电工程学院,北京100029

出　　处：《塑料工业》2023年第4期110-116,共7页China Plastics Industry

摘　　要：利用力学性能和热性能优异的纳米石墨烯片(GNP)和碳纳米管(CNT)协同增强改性超高分子量聚乙烯(UHMWPE),并对UHMWPE复合材料的微观形貌、热稳定性能以及力学性能等进行研究分析。结果表明,二维片层状GNP和一维空心管状CNT的协同作用并未明显改变复合材料的结晶度和熔融过程,但会使材料的热稳定性能得到显著改善,使起始失重温度从338.17℃增大至439.12℃。此外,纳米材料的添加在一定程度上弱化了应变硬化效果,降低了复合材料的拉伸性能,而复合材料的弯曲性能和抗冲击性能得到改善,复合材料的弯曲强度、弯曲模量和缺口冲击强度最大分别提高了18.2%、27.0%和26.9%。In this paper,ultra-high molecular weight polyethylene(UHMWPE)was reinforced and modified by graphene nanoplatelets(GNPs)and carbon nanotubes(CNTs)with excellent performances and the micromorphology,thermal stability and mechanical properties of UHMWPE/nano-materials composites were researched.The results show that the crystallinity and melting process of the UHMWPE composites are not significantly changed by the synergistic effect of the two-dimensional lamellar GNPs and the one-dimensional hollow tubular CNTs,while the thermal stability performance is immensely ameliorated,the initial degradation temperature increases from 338.2℃to 439.12℃.In addition,the tensile property of UHMWPE composites is dwindled due to the weakened strain hardening effect caused by addition of nanomaterials to a certain extent.Furthermore,the flexural properties and impact resistance of UHMWPE composites are improved.Comparing with UPE sample,the flexural strength,flexural modulus and notch impact strength are increased by 18.2%,27.0%and 26.9%,respectively.

关 键 词：复合材料 增强改性 超高分子聚乙烯 热性能 力学性能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]