Improving the resistance welding strength of carbon fiber/polyphenylene sulfide thermoplastic composite materials by modifying metal heating elements with silane coupling agents

doi:10.19936/j.cnki.2096-8000.20240528.011

Abstract

Abstract: This article focuses on carbon fiber resin based materials, namely carbon fiber polyphenylene sulfide (CF/PPS) thermoplastic composites with carbon fiber as reinforcement and polyphenylene sulfide as resin matrix. The resistance welding process is studied, and the optimal process parameters are explored. The heating element (metal mesh) is modified using silane coupling agent. When exploring the optimal process parameters, Taguchi experimental method was used and orthogonal experiments with three factors and three levels were designed to obtain the optimal parameters for CF/PPS resistance welding experiment (current 42 A, pressure 2.0 MPa, time 10 s), and the maximum lap shear strength (LSS) was 24.5 MPa. In resistance welding experiments, the heating element generates heat due to the Joule effect after being energized, melting the resin in the welding area, and cooling and solidifying under pressure to generate a welded joint. The surface modification of heating elements using silane coupling agents has improved the adhesion between polyphenylene sulfide and metal mesh. Compared with the welded joints of untreated heating elements, the LSS of the welded joints of heating elements treated with silane coupling agent was 31.1 MPa, increased by 27%.

Key words: CF/PPS thermoplastic composite material, resistance welding, Taguchi method, silane coupling agent, surface modification

CLC Number:

TB332

WANG Huanxiang, ZHAO Gang, XU Jian. Improving the resistance welding strength of carbon fiber/polyphenylene sulfide thermoplastic composite materials by modifying metal heating elements with silane coupling agents[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(5): 76-84.

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