Optimized design on bonding and microwave absorption properties of MWCNT—NH2 reinforced epoxy adhesive

doi:10.19936/j.cnki.2096-8000.20251028.001

Abstract

Abstract: The design and preparation of functionalized composite structures often require adhesives with both mechanical properties and excellent electrical performance. In this study, multi-walled carbon nanotubes (MWCNT) and surface-aminated multi-walled carbon nanotubes (MWCNT—NH₂) were used as reinforcing fillers to investigate the effects of their contents and surface amination on the bonding and microwave absorption properties of epoxy adhesives. Results show that MWCNT significantly regulate the adhesive properties: with increasing content, the bonding strength exhibits a trend of first increasing and then decreasing, while the microwave absorption performance gradually enhances. Surface amination modification improves the interfacial compatibility between MWCNT—NH₂ and the epoxy matrix, thereby significantly optimizing the bonding performance. However, the introduction of surface functional groups alters the electronic structure of MWCNT—NH₂ and disrupts the conductive network, resulting in a substantial decline in the microwave absorption performance of the MWCNT—NH₂-modified adhesive compared to that of the unaminated MWCNT system.

Key words: composite joining, CNT, amino, adhesive, bonding, microwave absorption

CLC Number:

TB332

ZHENG Kunpeng, WANG Juntao, LIU Zetong, HAO Jingye, SHI Jianheng, CHEN Dingding. Optimized design on bonding and microwave absorption properties of MWCNT—NH₂ reinforced epoxy adhesive[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(10): 1-5.

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Optimized design on bonding and microwave absorption properties of MWCNT—NH₂ reinforced epoxy adhesive

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