Bio-inspired design of an electricity-triggered self-healing interface for carbon fiber/bismaleimide composite by grafting graphene oxide and furfuramine onto carbon fiber

作者：Yuke Li, Lei Xiong, Weiyao Zhu, Fang Liu · 发表于：Industrial Crops and Products · 年份：2025 · DOI：10.1016/j.indcrop.2025.121917 · 被引用次数：9 · 研究领域：Advanced Sensor and Energy Harvesting Materials、Supercapacitor Materials and Fabrication、Advanced Materials and Mechanics

Inspired by self-healing functionality of biological systems, we constructed an interfacial self-healing carbon fiber (CF)/bismaleimide (BMI) composite system based on electrothermal effect of CF and graphene oxide (GO) driving the reversible transformation of Diels-Alder (DA) bonds. By surface grafting with GO and bio-based furfuramine (FA), the obtained CF grafting with GO and FA (CF-GO-FA) could form DA structures with bismaleimide matrix at composite interface, and also possessed good interfacial adhesions with matrix. Characterization results of CF-GO-FA, including FT-IR, XPS, SEM, Raman, and dynamic contact angle test, demonstrated that the surface grafting of GO and FA could considerably enhance the surface roughness, active functional groups, wettability, and surface energy of CF. Consequently, the interfacial and mechanical performances for CF-GO-FA/BMI composite exhibited substantial enhancements, with interfacial shear strength, monofilament tensile strength, bending strength, and interlaminar shear strength increasing by 106.8 %, 5.1 %, 26.0 %, and 34.9 %, respectively, compared to the desized CF/BMI composite. Microdroplet test confirmed that electrothermal effect triggered the reversible transformation of DA bonds connecting CF-GO-FA with BMI, endowing the resulted composite with interfacial self-healing capabilities. The initial self-healing efficiency of the CF-GO-FA/BMI composite was approximately 90.7 %, and it achieved five self-healing cycles with healing ...