CNT的质量分数和管径对CNT/HDPE复合材料微观结构及力学性能的影响  

Influence of CNT Mass Fractions and Diameters On the Microstructures and Mechanical Properties of CNT/HDPE Composites

作　　者：于佳滨 王非 黄昊 王龄芸 陈轲[2] YU Jiabin;WANG Fei;HUANG Hao;WANG Lingyun;CHEN Ke(School of Computer and Artificial Intelligence,Beijing Technology and Business University,Beijing 100048,China;College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京工商大学计算机与人工智能学院,北京100048 [2]北京化工大学机电工程学院,北京100029

出　　处：《塑料工业》2024年第6期70-75,共6页China Plastics Industry

摘　　要：碳纳米管(CNT)在CNT/高密度聚乙烯(HDPE)复合材料中发挥着重要作用。本文通过测试结晶度、缺口冲击强度以及拉伸强度,研究了CNT的质量分数和管径对复合材料的微观结构的影响机理。结果表明,改变CNT的质量分数能够提高复合材料的结晶度、缺口冲击强度和拉伸强度,0.2%CNT/HDPE的缺口冲击强度(53.1 kJ/m^(2))比HDPE的缺口冲击强度(31.5 kJ/m^(2))提高了68.57%;0.6%CNT/HDPE的结晶度(52.15%)比HDPE的结晶度(37.1%)提高了40.57%;0.8%CNT/HDPE的拉伸强度(25.97 MPa)比HDPE的拉伸强度(19 MPa)提高了36.68%。引入CNT后,复合材料的缺口冲击强度比HDPE低,但是能够提高复合材料的结晶度和拉伸强度,D5CNT(CNT管径为4~6 nm)/HDPE的结晶度(56.77%)比HDPE的结晶度(37.1%)提高了53.01%,改变管径对复合材料的拉伸强度提升不明显。本研究通过改变CNT质量分数与管径,提升了CNT/HDPE复合材料的冲击性能和拉伸性能,为制备性能优异的CNT/HDPE复合材料提供了理论指导。Carbon nanotubes(CNT)play a significant role in the CNT/high density polyethylene(HDPE)composites.This study investigated the influence mechanisms of CNT mass fractions and diameters on the microstructures of the composite materials by testing crystallinity,impact strength,and tensile strength.The results indicate that altering the CNT mass fractions could enhance the crystallinity,impact strength,and tensile strength of the composite materials.The impact strength of 0.2%CNT/HDPE(53.1 kJ/m^(2))is 68.57%higher than that of HDPE(31.5 kJ/m^(2));the crystallinity of 0.6%CNT/HDPE(52.15%)is 40.57%higher than that of HDPE(37.1%);the tensile strength of 0.8%CNT/HDPE(25.97 MPa)is 36.68%higher than that of HDPE(19 MPa).After the introduction of CNT,the impact strengths of composite materials are lower than that of HDPE,but the crystallinity and tensile strength of the composite materials enhance.The crystallinity(56.77%)of D5CNT/HDPE with a CNT diameter of 4-6 nm is 53.01%higher than that of HDPE(37.1%).The tensile strengths of the composite materials are not significantly improved by changing the CNT diameters.This study improved the impact and tensile properties of CNT/HDPE composite materials by adjusting the CNT mass fractions and diameters,providing theoretical guidance for the preparation of high-performance CNT/HDPE composite materials.

关 键 词：碳纳米管 高密度聚乙烯 结构 力学性能 

分 类 号：TQ325.1+2[化学工程—合成树脂塑料工业]