Fracture resistance, thermal and electrical properties of epoxy composites containing aligned carbon nanotubes by low magnetic field
Fracture resistance, thermal and electrical properties of epoxy composites containing aligned carbon nanotubes by low magnetic field
复制标题
低磁场下定向碳纳米管环氧复合材料的断裂性能、热性能和电性能
DOI：
10.1016/j.compscitech.2015.04.007
复制
发表时间：
2015-06-19
影响因子：
9.1
通讯作者：
Mai, Yiu-Wing
中科院分区：
文献类型：
--
作者：
Ma, Chuanguo;Liu, Hong-Yuan;Mai, Yiu-Wing
在0.4T的低磁场下，实现了碳纳米管与环氧树脂中残留催化剂Ni颗粒的定向排列。基于CNT/EP悬浮液的流变学结果，在60 ℃下制备含有不同负载量的CNT的EP复合材料。研究了碳纳米管负载量和磁场对复合材料的断裂韧性（K-IC）、玻璃化转变温度（T-g）和电性能的影响。所获得的结果表明，显着增强K-IC，独立的碳纳米管的取向，相比，纯环氧树脂。最大的增加（类似于51%）是通过具有3 wt.定向CNT横向于裂纹生长。此外，磁性定向碳纳米管复合材料显示各向异性的K-IC。与没有施加磁场的CNT/EP复合材料相比，K-IC增加在高CNT负载下不太有效。最后对增韧机理、玻璃化转变温度和电导率进行了讨论。(C)2015爱思唯尔有限公司版权所有。
The alignment of carbon nanotubes (CNTs) with residual catalyst Ni particles in epoxy resin (EP) was achieved under a low magnetic field of 0.4 T. EP composites containing different loading of CNTs were prepared at 60 degrees C based on the rheology results of CNT/EP suspensions. The effects of CNT loading and magnetic field on the fracture toughness (K-IC), glass transition temperature (T-g) and electrical properties of the composites were studied. The obtained results showed significant enhancements in K-IC, independent of the orientation of the CNTs, compared to neat epoxy. The maximum increase (similar to 51%) was achieved by composites with 3 wt.% aligned CNTs transverse to crack growth. Additionally, composites with magnetically aligned CNTs displayed anisotropy in K-IC. Compared to CNT/EP composites with no applied magnetic field, the K-IC increase was less effective at high CNT loading. Finally, toughening mechanisms, T-g and electrical conductivity results were discussed. (C) 2015 Elsevier Ltd. All rights reserved.