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
With the wide application of structural adhesives in the aerospace field, the structural adhesive films with only bonding property have not met the current needs. The structural-functional integrated adhesive films have become the current study hotspot. In this paper, an epoxy-based electromagnetic wave-absorbing adhesive film was prepared by adding the magnetite/SWCNTs as the absorbing agent to the epoxy adhesive. And then, it was subjected to hygrothermal aging for 1500h at 70°C and 90% RH. The results show that the absorbing filler was uniformly dispersed in the epoxy resin matrix. The reflection loss (RL) peak of the magnetite/SWCNTs/epoxy adhesive film reached −27.5 dB at the frequency of 8.75 GHz when the absorbing agent content was 20 wt%. The effective bandwidth was 3 GHz with 25 wt% absorbent content. Moreover, after 1000h of hygrothermal aging, the lap shear strength of the magnetite/SWCNTs/epoxy adhesive film decreased by 19.6%, indicating that it can perform excellent service under hygrothermal conditions.
Funder
Shenyang Natural Science Foundation Project
Science and Technology Project of Shenyang
Chunhui Project Foundation of the Education Department of China