论文部分内容阅读
采用球磨法在环氧树脂中分散了不同质量分数(0、5wt%和10wt%)的埃洛石纳米管(HNTs),通过哌啶固化剂固化,制备了HNTs/环氧树脂复合材料,并利用纳米压痕法测试了HNTs/环氧树脂复合材料的弹性模量、硬度和蠕变性能。SEM和TEM观测表明:HNTs在环氧树脂中分散情况较好。纳米压痕实验结果表明:在不牺牲HNTs/环氧树脂复合材料弹性模量、硬度以及玻璃化转变温度的基础上,HNTs明显提高了环氧树脂基复合材料的抗蠕变性能,这主要是由于HNTs和环氧基分子链形成了新的交联结构,增加了材料的交联密度,刚性纳米粒子限制了环氧基分子链的活动性。
HNTs / epoxy resin composites were prepared by ball milling method with different mass fractions (0, 5wt% and 10wt%) of HNTs dispersed in epoxy resin and cured by piperidine curing agent The elastic modulus, hardness and creep properties of HNTs / epoxy composites were tested by nanoindentation method. SEM and TEM observations showed that HNTs dispersed well in epoxy resin. The results of nano-indentation experiments show that HNTs significantly improve the creep resistance of epoxy resin-based composites without sacrificing the elastic modulus, hardness and glass transition temperature of HNTs / epoxy composites Due to the formation of a new cross-linked structure between the HNTs and the epoxy-based molecular chains, the crosslink density of the materials is increased, and the rigid nano-particles limit the activity of the epoxy-based molecular chains.