纳米石墨增强氢化环氧树脂形状记忆复合材料的研制

Study on preparing shape memory composites based on nano-graphite reinforced hydro-epoxy resin

采用不同比例的纳米石墨粉与氢化环氧树脂(H-EP)共混,并与一定比例的聚丙二醇二缩水甘油醚(PPGDGE)和异佛尔酮二胺(IPDA)完全固化,制备出一种新型的形状记忆复合材料。研究结果表明:该复合材料的弯曲强度和储能模量均随石墨含量增加呈先升后降态势,并且在w(纳米石墨粉)=10%(相对于总物料质量而言)时相对最大,但纳米石墨粉含量对复合材料的玻璃化转变温度(Tg)影响大不;当w(纳米石墨粉)≤10%时,其可均匀分散在H-EP基体中,相应的复合材料具有良好的形状记忆性能,其变形几乎可以完全回复。

A novel shape memory composite was prepared by completely curing blend among different nano- graphite powder contents reinforced hydro- epoxy resin （H- EP） , poly （propylene glycol） diglycidyl ether（PPGDGE） and isophorone diamine（IPDA）. The research results showed that the composite had the relatively maximal bend strength and storage modulus, which had raise-fall trend with increasing graphite contents, when mass fraction of nano-graphite powder was 10% in total materials, but the influences of nano-graphite powder contents on glass transition temperature （T_g） of composites were slight. The corresponding composite has the good shape memory property, its deformation could be almos full recoveried because the nano-graphite powder could be evenly dispersed in H-EP matrix when mass fraction of nano-graphite powder was not more than 10%.