摘要
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。
Halloysite nanotubes(HNTs)with different mass fractions,i.e.0,5wt% and 10wt%,were dispersed in epoxy using ball milling homogenization.And HNTs/epoxy composites were prepared using piperidine hardner.The elastic modulus,hardness and creep properties of HNTs/epoxy composites were determined using nanoindentation method.SEM and TEM observations show that HNTs are well dispersed in epoxy.Nanoindentation test results show that there is a significant increase in anti-creep properties of the epoxy matrix composites without sacrificing other properties such as elastic modulus,hardness and glass transition temperature of HNTs/epoxy composites.This is because the new network caused by interfacial bonding between HNTs and epoxy matrix chains could increase the cross linking density of materials,and the rigid nanoparticles restrict the mobility of the epoxy matrix chains.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2015年第1期32-38,共7页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(51210008)
