碳纳米管的表面修饰及其对环氧树脂热性能的影响

Surface Modification of Carbon Nanotubes and Their Influence on Thermal Properties of Epoxy Resin

先后利用Fenton试剂和缩水甘油氧丙基硅烷偶联剂(KH560)对碳纳米管(CNTs)进行表面修饰,制备了不同种类的环氧树脂(EP)/CNTs复合材料并对其性能进行了研究。结果表明:CNTs经过Fenton试剂处理后,其表面成功引入羟基,进一步用KH560修饰后成功地引入了环氧官能团。Fenton试剂的组成可以有效控制羟基基团的数目,并进一步决定环氧官能团的数目。单独采用Fenton试剂处理或Fenton试剂和KH560共同处理都可以改善CNTs的分散性能,提高EP/CNTs复合材料的玻璃化温度(Tg)和热稳定性能,但后者的处理效果更好。

Carbon nanotubes （CNTs） were surface modified first with Fenton reagent and then with a glycidyl oxygen propyl silane coupling agent. Thus modified CNTs were introduced into epoxy resins （EP）, and the properties of the composites were investigated. It showed that hydroxyl and epoxy groups were introduced onto the surface of CNTs by Fenton reagent treatment and KH560 modification, respectively. Moreover, the component of Fenton reagent could effectively control the quantities of hydroxyl groups, and further decide the number of epoxy functional groups. The Fenton reagent treatment improved the dispersion of CNTs in EP, the glass transition temperature and thermal stability of EP were increased. Such improvement was further enhanced by subsequent modification with coupling agent.