Effect of acid and TETA modification on mechanical properties of MWCNTs/epoxy composites

被引：62
作者：
Li, ShuQin [1 ]
Wang, Fang [1 ]
Wang, Ye [1 ]
Wang, JingWen [1 ]
Ma, Jun [2 ]
Xiao, Jun [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 210016, Peoples R China
[2] Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia
来源：
JOURNAL OF MATERIALS SCIENCE | 2008年 / 43卷 / 08期
关键词：
D O I：
10.1007/s10853-008-2489-1
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Acid treatment and triethylene-tetramine (TETA) modification of multi-walled carbon nanotubes (MWCNTs) purposing to attain better dispersibility and stronger interfacial bonding between MWCNTs and epoxy matrix have been carried out in this paper. The epoxy and MWCNTs/epoxy composites were produced by cast molding method. Stress-strain curves show that TETA-MWCNTs/epoxy hold the greatest toughness of all samples with 0.5 wt.% nanoparticles. The Young's modulus of TETA-MWCNTs/epoxy has a significant increase about 38% compared to the neat epoxy, while the Young's modulus of unmodified MWCNTs/epoxy or acid-modified MWCNTs/epoxy has a bit of decrease. Tensile and impact strength tests reflect that TETA-MWCNTs reinforced epoxy composites have an obvious improvement of tensile strength about 30% and an enhancement of impact strength over 34% compared to the pure epoxy composites with only 0.5 wt.% loading of TETA-MWCNTs. Scanning electron microscopy images of fractured surface of MWCNTs/epoxy indicate homogeneous dispersibility of TETA-MWCNTs and strong interfacial adhesion between the TETA-MWCNTs and the epoxy in the MWCNTs/epoxy composite.
引用
收藏
页码：2653 / 2658
页数：6
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