摘要
纳米碳管由于其优异的特性可以用于改善复合材料的导热和机械性能。本文通过传统的机械混合工艺,采用氧化铝粉体和少量纳米碳管填充甲基乙烯基硅橡胶,研究了氧化铝粉体的质量分数、表面改性和纳米碳管的添加对复合材料热导率、杨氏模量和硬度的影响。结果表明:氧化铝粉体的质量分数越高,复合材料的热导率越高;当氧化铝粉体的质量分数固定时,对其表面改性和添加纳米碳管能够明显提高复合材料的热导率、杨氏模量和硬度,发现改性氧化铝和纳米碳管并用可以协同增强填料与橡胶间的界面作用,促进橡胶基底中更好的导热通道和网络结构的形成,从而改善复合材料的导热和机械性能。
Carbon nanotubes(CNTs)can be used to improve the thermal and mechanical properties of composites because of their excellent characteristics.Methyl vinyl silicone rubber matrix composites filled with alumina(A1203)powder and CNTs were fabricated by a conventional mechanical blending method.The effects of the mass fraction of A1203 powder,surface modification of A1203 powder by silanization with dodecyltrimethoxysilane and the addition of CNTs on the thermal conductivity,Young’s modulus and hardness of the composites were investigated.Results showed that a higher mass fraction of A1203 powder results in a higher thermal conductivity of the composites.When the mass fraction of A1203 powder was fixed,the thermal conductivity,Young’s modulus and hardness of the composites were obviously improved by surface modification of the powder and adding a small amount of CNTs.A combination of the modified A1203 filler and CNT filler improves the interfacial interaction between the fillers and rubber matrix by the formation of better heat conduction channels and network structures in the rubber matrix,thereby improving the thermal conductivity and mechanical properties of the composites.
作者
林嘉隆
苏诗茗
贺艳兵
康飞宇
LIN Jia-long;SU Shi-ming;HE Yan-bing;KANG Fei-yu(Engineering Laboratory for Functionalized Carbon Materials,Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China;Laboratory of Advanced Materials,School of Materials,Tsinghua University,Beijing 100084,China)
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2020年第1期66-72,共7页
New Carbon Materials
基金
国家自然科学基金(51672156).
关键词
纳米碳管
氧化铝
硅橡胶
热导率
协同效应
Carbon nanotubes
Alumina
Silicone rubber
Thermal conductivity
Synergistic effect
作者简介
林嘉隆,硕士研究生.E-mail:boylin@outlook.com;通讯作者:贺艳兵,博士,副教授.E-mail:he.yanbing@sz.tsinghua.edu.cn;通讯作者:康飞宇,博士,教授.E-mail:fykang@sz.tsinghua.edu.cn。
