Affiliation:
1. School of Materials Science and Engineering, Shenyang Aerospace University, Shenyang, China
2. Liaoning Key Laboratory of High Performance Polymer Matrix Composites, Shenyang, China
Abstract
In this paper, ultra-low content single-walled carbon nanotube(SWCNT)/epoxy composites were prepared by non-covalent modification of SWCNTs, which improved the dispersion of SWCNTs in epoxy resin, and their properties were investigated. It was shown that the electrical conductivity of SWCNT/epoxy composites increased by 7 orders of magnitude over that of epoxy resin when the content of SWCNTs was 0.005 wt%. The impact strength, tensile strength, and elastic modulus of the materials were increased by 47.9%, 58.9%, and 19.0%, respectively, and the strengthening mechanism of SWCNTs on the matrix was analyzed by SEM. Then SWCNTs were introduced into carbon fiber (CF)/epoxy composites and carbon fiber pressure vessels. In comparison to CF/epoxy composites, the shear and tensile strengths of SWCNT/CF/epoxy composites exhibited an increase of 49.2% and 9.8%, respectively, and the bursting pressure of nano-modified pressure vessels was increased by 15.5%. This study provides a new application method for nano-modified epoxy resins and broadens the application fields of epoxy resins.
Funder
Natural Science Foundation of Shenyang
Fundamental Research Funds for the Universities of Liaoning Province
U35 Top Young Talent Project of Shenyang
Applied Basic Research Program of Liaoning Province
Chunhui Project Foundation of the Education Department of China
Aeronautical Science Foundation of China
Shenyang Science and Technology Project
Science and Technology Project of Shenyang