CNTs添加量对航空航天用EP/CFDSF复合材料性能的影响  

Effects of CNTs Content on EP/CFDSF Composites for Aerospace

作　　者：金琪 梁谱鑫 肖建军 JIN Qi;LIANG Pu-xin;XIAO Jian-jun(College of Resource, Environment and Chemical Engineering, Nanchang University, Nanehang 330031, China)

机构地区：[1]南昌大学资源环境与化工学院,江西南昌330031

出　　处：《塑料工业》2018年第11期150-153,共4页China Plastics Industry

基　　金：国家自然科学基金(No.21276121);江西省自然科学基金(No.20122BAB203021)

摘　　要：研究了在环氧树脂(EP)中同时加入碳纤维双层间隔织物(CFDSF)与碳纳米管(CNTs)来提高EP强度的相关作用机理,探讨CNTs对EP/CFDSF/CNTs电学特性的影响。研究结果表明,随着CNTs含量的不断增加,试样的弯曲强度与冲击强度均发生了先增大后降低的现象,EP/CFDSF复合材料的力学性能明显高于EP材料。当CNTs的添加量为2. 5份时,EP/CFDSF试样的冲击强度和弯曲强度测试值达到最高,依次为18. 1 k J/m^2和146. 5 MPa,比纯EP材料的强度显著提高。不含CNTs时复合材料断面具有平整的微观形貌;添加了2. 5份CNTs的试样断面区域表现为明显的凹凸变化特点。随着CNTs添加量的增加,试样的电阻率明显下降,2. 5份CNTs的两种试样体积电阻率分别为19. 6Ω·cm和14. 8Ω·cm。The mechanism of adding Carbon fibre double spacing fabrics( CFDSF) and carbon nanothubes( CNTs) to epoxy resin( EP) to increase EP strength was investigated,and the influence of CNTs on EP/CFDSF/CNTs electrical properties was discussed. The results show that the bending strength and impact strength of the samples could increase firstly and then decrease with the increasing content of CNTs,and the mechanical properties of EP/CFDSF composite materials are significantly better than EP materials. By the addition of 2. 5 phr CNTs, the bending strength and impact strength could achieve 124. 7 MPa and14. 9 kJ/m^2,respectively. Comparing with pure EP materials,it provides a significantly improvement of the strength. Without CNTs,the fracture surface of composite materials shows a flat microscopic morphology. By the addition of 2. 5 phr CNTs,the fracture surface indicates an obvious concavo-convex characteristic. As the increasing of CNTs content,the resistivity would decrease. The resistivity of EP and EP/CFDSF composites with CNTs could achieve 18. 4 Ω·cm and 14. 9 Ω·cm,respectively.

关 键 词：碳纳米管 环氧树脂/碳纤维双层间隔织物复合材料 力学性能 电学特性 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]