多壁碳纳米管薄膜增强聚间二甲苯己二酰胺复合材料  

Multi-Walled Carbon Nanotube Buckypaper Reinforced Poly(m-xylene adipamide)Composites

作　　者：郭欣 李迎春[1] 王文生[1] 孟祥宁 Guo Xin;Li Yingchun;Wang Wensheng;Meng Xiangning(School of Materials Science and Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学材料科学与工程学院,太原030051

出　　处：《工程塑料应用》2023年第3期40-45,共6页Engineering Plastics Application

摘　　要：多壁碳纳米管薄膜(BP)可以提升材料的力学性能和导热、导电性能,在制备热塑性复合材料方面具有巨大的应用潜力。采用先溶液浸渍后热压成型的方法制备了聚间二甲苯己二酰胺(MXD6)/BP复合材料,研究了BP含量对复合材料热导率、电导率、拉伸强度的影响。利用傅里叶变换红外光谱(FTIR)证实了碳纳米管和MXD6之间存在的π-π共轭效应,并用扫描电子显微镜(SEM)观察了MXD6在碳纳米管周围的分布。使用差示扫描量热(DSC)法和热重(TG)分析表征了复合材料的结晶性能和热稳定性,使用热导率仪、万用表和微机控制电子万能试验机测试了复合材料的导热性能、导电性能和力学性能。研究表明,在加入了碳纳米管后,MXD6的热导率、电导率和拉伸强度有了显著的提升。当复合材料中MXD6的质量分数为94.84%时,复合材料的拉伸强度达到了540.3 MPa,提高了6倍,并且复合材料的电导率达到24.814 S/cm,热导率为1.453 W/(m·K),有效地拓展了MXD6的应用范围。Multi-walled carbon nanotube buckypaper(BP)can improve the mechanical properties,thermal and electrical conductivity of materials,and have great application potential in the preparation of thermoplastic composites.Polym-xylene adipamide(MXD6)/multi-wall carbon nanotube buckypaper(BP)composites were prepared by solution impregnation followed by hot pressing.The effects of BP content on thermal conductivity,conductivity and tensile strength of the composites were investigated.Theπ-πconjugation effect between carbon nanotubes and MXD6 was confirmed by Fourier infrared spectroscopy(FTIR),and the distribution of MXD6 around carbon nanotubes was observed by scanning electron microscopy(SEM).The crystallization properties and thermal stability of the composites were characterized by differential scanning calorimetry(DSC)and thermogravimetric(TG)test.The thermal conductivity,electrical conductivity and mechanical properties of the composites were tested by thermal conductivity meter,multimeter and microcomputer controlled electronic universal testing machine.The results show that the thermal conductivity,electrical conductivity and tensile strength of the MXD6 have been significantly improved by the addition of carbon nanotubes.When the content of MXD6 in composites is 94.84 wt%,the tensile strength of the composites reaches 540.3MPa,which increases by 6 times,and the conductivity of the composites reaches 24.814 S/cm,and the thermal conductivity is 1.453 W/(m·K),which effectively expands the application range of MXD6.

关 键 词：碳纳米管薄膜 聚间二甲苯己二酰胺 导热性能 导电性能 力学性能 

分 类 号：TQ323[化学工程—合成树脂塑料工业]