摘要
本研究以甲基乙烯基硅橡胶为基体,以白炭黑和碳纤维为复合填料,以双二五过氧化物为硫化剂,制备得到了CF/SiO2/MVQ导热复合材料,并对其硬度、拉伸强度、断裂伸长率以及其微观形貌进行了研究。结果表明:随着复合填料中碳纤维比例的增加,碳纤维在硫化胶中的排列由有序转变为无序,硫化胶出现大量缺陷,拉伸强度、断裂伸长率和硬度分别降低83.15%、53.19%和31.25%。导热系数先增大后减小,当复合填料中碳纤维达到75%时导热系数增加74.56%,达到最大值0.4228 W/m·K。
In this study,CF/SiO2/MVQ thermal composites were prepared by using methyl vinyl silicone rubber as the matrix,silica carbon and carbon fiber as composite fillers and bismuth five as vulcanizing agent.The tensile strength,elongation at break and its micromorphology were studied.The results show that with the increase of the proportion of carbon fiber in the composite filler,the arrangement of carbon fiber in the vulcanizate changes from order to disorder,and the vulcanizate has many defects,and the tensile strength,elongation at break and hardness decrease by 83.15%,53.19%and 31.25%,respectively.The thermal conductivity increases first and then decreases.When the carbon fiber reaches 75%in the composite filler,it increases by 74.56%,reaching a maximum of 0.4228 W/m·K.
作者
李波
王铎
LI Bo;WANG Duo(Shaanxi Institute of Technology School of Materials,Hanzhong 723001,Shaanxi,China)
出处
《合成材料老化与应用》
2020年第3期21-23,共3页
Synthetic Materials Aging and Application
基金
西南科技大学四川省非金属复合与功能材料重点实验室—省部共建国家重点实验室培育基地资助项目(项目编号16kffk06)。
关键词
碳纤维
白炭黑
导热
甲基乙烯基硅橡胶
carbon fiber
silica
thermal conductivity
methyl vinyl silicone rubber
