碳纳米管/炭黑协同效应对天然橡胶/顺丁橡胶复合材料性能的影响

Influence of Synergistic Effect of Carbon Nanotubes/Carbon Black on Properties of Natural Rubber/Butadiene Rubber Composites

使用两种一定比例的填料,在增加碳纳米管(CNTs)的同时不等量的减少炭黑(CB),其比例为m(CNTs):m(CB的减少量)=1:2.5,研究填料的变化对橡胶的力学等性能的影响。用扫描电镜(SEM)观察橡胶脆断面碳纳米管的分散情况,在3D测量激光显微镜下观察了橡胶拉伸断面的平整度和高度差。结果表明,填充4 phr CNTs时拉伸强度最高,比添加0 phr的高11.41%;随着CNTs的增多炭黑的减少使材料的加工性能变差,模量和耐磨性提高,填充8 phr CNTs的橡胶比0 phr的耐磨性高21.14%;根据动态力学性能测试(DMA)的损耗因子,随着碳CNTs添加量的增多橡胶的滚动阻力减小,但是抗湿滑性变差。

Carbon nanotubes（CNTs） and carbon black（CB） were used as the hybrid reinforcing fillers, the coordinated effect of different fillers on the properties of composites was investigated. The filling content of CNTs increases as the decrease of CB content, and the mass ratio of CNTs increase to CB decrease is fixed to m（CNTs）：m（decreasing amount of CB）=1：2.5.The dispersion of CNTs at the brittle fracture surface was gottenby the scanning electron microscopy（SEM）. The flatness and height difference of the tensile fracture-surface were observed by 3D measuring laser microscope. The tensile strength was the best when 4 phr CNTs was filled, that was 11.41% higher than that of composites with 0 phr CNTs.The processability was worse and the modulus was enhanced, abrasion property increased with the increase of CNTs and composites with 8 phr CNTs was 21.14% more wearable than 0 phr CNTs. According to the loss factor of dynamic mechanical analysis（DMA）, rolling resistance of composites was reductive but wet-skid resistance decreased with the increase of CNTs.