论文标题
比较多壁碳纳米管和霍洛伊特纳米管与EVA纳米复合材料中的增援
Comparing Multi-Walled Carbon Nanotubes and Halloysite Nanotubes as Reinforcements in EVA Nanocomposites
论文作者
论文摘要
研究了碳多壁纳米管（MWCNT）和霍洛岛纳米管（HNTS）对EVA（乙酸乙酸乙酯）共聚物的物理，热，机械和电气性能的影响。通过熔融混合物制备了含有MWCNT或HNT的EVA纳米复合材料，以及含有两种纳米填料的杂化纳米复合材料。扫描电子微拷贝（SEM）图像揭示了整个EVA矩阵中两种纳米管的良好分散。将纳米管掺入EVA共聚物基质中没有显着影响聚合物的结晶行为。随着CNT（碳纳米管）含量的增加（加载8 wt。％时），基于EVA的纳米复合材料的拉伸强度随着CNT（碳纳米管）含量的增加而增加。反过来，HNT在大幅度增加了休息时的应变。机械循环拉伸试验表明，带有杂交增强的纳米复合材料表现出有趣的强化行为。可见杂种纳米填料对模量的协同作用可见。此外，随着EVA/CNTS纳米复合材料中MWCNTS含量的增加，也观察到了电导率的增强。
The influence of carbon multi-walled nanotubes (MWCNTs) and halloysite nanotubes (HNTs) on the physical, thermal, mechanical, and electrical properties of EVA (ethylene vinyl acetate) copolymer was investigated. EVA-based nanocomposites containing MWCNTs or HNTs, as well as hybrid nanocomposites containing both nanofillers were prepared by melt blending. Scanning electron microcopy (SEM) images revealed the presence of good dispersion of both kinds of nanotubes throughout the EVA matrix. The incorporation of nanotubes into the EVA copolymer matrix did not significantly affect the crystallization behavior of the polymer. The tensile strength of EVA-based nanocomposites increased along with the increasing CNTs (carbon nanotubes) content (increased up to approximately 40% at the loading of 8 wt.%). In turn, HNTs increased to a great extent the strain at break. Mechanical cyclic tensile tests demonstrated that nanocomposites with hybrid reinforcement exhibit interesting strengthening behavior. The synergistic effect of hybrid nanofillers on the modulus at 100% and 200% elongation was visible. Moreover, along with the increase of MWCNTs content in EVA/CNTs nanocomposites, an enhancement in electrical conductivity was observed.
