This study presents a simple technique for strengthening the adhesive-bond strength between aluminium (Al) substrate and carbon fibre reinforced polymer (CFRP) utilising resin pre-coating (RPC) with carbon nanotubes (CNTs). The CNT-containing RPC solution with 90 wt％acetone and 10 wt％resin (without hardener) was applied onto Al substrates, where micro-/nano-vertical channels had been created by chemical or mechanical surface treatments to accommodate CNTs. RPC was able to fill all micro-/nano-cavities over the Al substrate surface, then CNTs were pulled into those vertical micro-channels by the capillary action generated from acetone evaporation. Normal epoxy adhesive (resin+hardener) was applied after the CNT-containing RPC treatment. CNTs bridging across the interface between the adhesive joint and Al substrate and sealing of micro-/nano-cavities by RPC effectively enhanced the interfacial shear bond strength between the Al substrate and CFRP by 30–100％depending on the Al substrate surface profiles. Al substrates with two different chemical treatments were compared in this study for the effectiveness of CNT interfacial reinforcement. Results from a steel substrate after sandblasting were also included for comparison.

Gang Han;Bo Tan;Fei Cheng;Binhua Wang;Yee-Kwong Leong;Xiaozhi Hu

Department of Mechanical Engineering, University of Western Australia, Perth, WA, 6009, Australia;Shaoxing Baojing Composite Materials Co., Ltd, Shaoxing, 312073, PR China;School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621000, PR China;Key Laboratory of Road Construction Technology and Equipment, MOE, Chang'an University Xi'an, 710064, PR China;Department of Chemical Engineering, University of Western Australia, Perth, WA, 6009, Australia

纳米材料科学（英文版）

[1]Gang Han;Bo Tan;Fei Cheng;Binhua Wang;Yee-Kwong Leong;Xiaozhi Hu-.CNT toughened aluminium and CFRP interface for strong adhesive bonding)[J].纳米材料科学（英文版）,2022(03):266-275

hardener,resin+hardener,sandblasting

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