针对多壁碳纳米管(MWCNT)填充氟橡胶(FKM)复合材料,采用不同的薄通次数,分别为4次、6次、10次、14次、18次和22次,使MWCNT在FKM中的分散逐渐均匀并研究MWCNT分散对FKM性能的影响。应变扫描结果证明,随着薄通次数的增加,MWCNT在FKM中的分散逐渐均匀。力学性能测试结果显示,MWCNT分散地越均匀,补强效果越好。扫描电子显微镜(SEM)分析与导电性能的结果证明,随着分散程度的提高,FKM/MWCNT复合材料的体积电阻率逐渐降低,并存在渗流阈值现象。
For multi-walled carbon nanotubes (MWCNT) filled fluoroelastomer (FKM) composite,we passed the compound through the rolls by different thin pass numbers,4,6,10,14,18 and 22 times,to gradually uniform the dispersion of MWCNT in FKM,and the effect of the dispersion of MWCNT on the properties of FKM was investigated.The strain sweep results showed that the dispersions of MWCNT in FKM were gradually homogenized with the increase of the numbers of thin passes.The mechanical property test results indicated that the more evenly dispersed the MWCNT,the better the reinforcement effect.The results of scanning electron microscopy (SEM) and electrical conductivity confirmed that the volume resistivity of the FKM/MWCNT composite decreased gradually with the increase of dispersion degree,exhibiting a percolation threshold phenomenon.
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