Microwave irradiation on CFs and its effects on the interfacial properties of CFRPs

doi:10.19936/j.cnki.2096-8000.20221228.016

Abstract

Abstract: Microwave irradiation is seen as an effective modification technique for interface enhancement of carbon fiber reinforced plastics (CFRPs). In this study, a microwave system which can transfer single mode of TE₁₀ electromagnetic wave was used for CFs surface modification. The modification process of microwave on carbon fibers (CFs) were investigated in electromagnetic field theory, electromagnetic simulation and experiments. Three irradiating parameters of the angle between CFs and the electric field direction, irradiating area and irradiating time were optimized. The enhancing effect of microwave irradiation on composites were quantitatively characterized. Ansoft HFSS simulation results showed that the microwave absorption property of CFs is related to the direction of microwave polarization, exhibiting a good absorption of microwave that polarized perpendicular to the CFs with reflectivity of only 6.44%, while a high reflectivity of 98.44% to microwave that polarized parallel to the CFs which should be avoided. The temperature of the irradiated CF fabric was tested and analyzed, based on which an optimized irradiating method was obtained for uniform irradiation of the carbon fabric. Based on the micro drop debonding method, the relationship between the interfacial shear strength (IFSS) of CFRPs and the microwave irradiation time was established, and the maximum 22.6% increase of the IFSS of CFRPs was obtained at 80 s radiation.

Key words: CFRPs, surface modification of CFs, microwave irradiation, IFSS, microwave absorption

CLC Number:

TB332

ZHANG Jing-jing, LIANG Sen, TANG Chao. Microwave irradiation on CFs and its effects on the interfacial properties of CFRPs[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(12): 116-123.

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