高能量超声波改性MWCNTs/环氧树脂特性分析

Properties analysis of high energy ultrasonic wave treated multi-walled carbon nanotubes/epoxy resin

采用高能量超声波与低能量超声波对一种多壁碳纳米管(MWCNTs)/环氧树脂体系进行改性处理,结合流变仪、DSC、FTIR、XPS、XRD、TEM等测试手段,分析了不同超声波处理条件下MWCNTs物理化学特性的变化及其对MWCNTs在环氧树脂中的分散性和相容性的影响,并进一步考察了MWCNTs/环氧树脂体系的耐热性和弯曲性能。实验结果表明:超声波能量不同,MWCNTs的改性效果不同,高能量超声波对MWCNTs有更好的分散效果和分散效率,并能使MWCNTs表面活性增强,而低能量超声波则不明显;添加少量高能量超声波改性的MWCNTs,可以提高环氧树脂的弯曲模量和玻璃化转变温度,表明MWCNTs与基体之间形成了较强的结合界面。

High energy and low energy ultrasonic waves were used to modify a kind of multi- walled carbon nanotubes （MWCNTs） /epoxy resin. By means of rheometer, DSC, FTIR, XPS, XRD and TEM, the physical and chemical characteristics of MWCNTs treated by ultrasonic waves with high and low energies were studied. The dispersion and compatibility of MWCNTs in epoxy resin were also analyzed. Moreover, the thermal stability and flexural property of MWCNTs/epoxy resin were measured. The experimental results show that the modified extent of MWCNTs is different with different ultrasonic wave energy. MWCNTs modified with high energy ultrasonic wave have better dispersive degree and dispersive efficiency in the resin, and the surface activity of MWCNTs is increased, which is not the case for the condition of low energy ultrasonic wave treatment. In addition, the flexural modulus and glass transition temperature of epoxy resin can be enhanced by adding a small amount of MWCNTs modified with high energy ultrasonic wave, indicating that there are strong interfaces between MWCNTs and resin matrix.