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Flake carbonyl iron powder(CIP) is a typical magnetic-loss electromagnetic wave absorber, but its high density limits practical application. In this study, CIP was compounded with waterborne polyurethane( PU) and polyester fiber(PET) to prepare CIP/PET/PU composites, and their performance was systematically investigated. Two CIP sizes were each dispersed at different mass ratios into PU solutions to form impregnation solutions, into which PET fibers were subsequently immersed to yield CIP/PET/PU. Characterization of the microstructure, microwave absorption properties, and mechanical performance revealed distinct differences between the front and back sides of the composite. The cross-section exhibited a gradient distribution of CIP, transitioning from a dense concentration at the back side to a sparse distribution at the front side, with larger CIP particles being more prone to forming a dense structure on the back side. The microwave absorption performance of the back side was significantly superior to that of the front side. For composites containing larger CIP at a mass ratio of m(CIP)∶m(PU) = 1.5, the minimum reflection loss reached-25 d B at 18 GHz. Effective absorption was still achieved at a low mass ratio of m(CIP)∶m(PU) = 0.15, indicating promising potential for lightweight composites. Regarding mechanical properties, composites with smaller CIP at m(CIP)∶m(PU) = 0.015 showed mechanical performance slightly higher than or comparable to that of the CIP-free composite. Similarly, composites with larger CIP at m(CIP)∶m(PU) = 1.5 exhibited slightly better mechanical properties than the CIP-free composite. However, all other samples showed inferior mechanical performance compared with the CIP-free composite.
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Basic Information:
China Classification Code:TB332
Citation Information:
[1]JIN Xinyi,GUO Nannan,FENG Jingang ,et al.Fabrication and electromagnetic wave absorption properties of flake carbonyl iron/polyester fiber reinforced composites[J].Journal of Nantong University (Natural Science Edition),2026,25(01):40-47.
Fund Information:
先进纺纱织造及清洁生产国家地方联合工程实验室2024年开放基金项目（FX20240012）
2026-01-16
2026-01-16
2026-01-16