Abstract Dissimilar material bonding is a challenge constantly being considered within engineering. This paper presents a method for tailoring metal surfaces by covalently grafting polymers that are directly complimentary to their respective dissimilar material. Acrylic acid was grafted onto the surface of aluminium which was subsequently bonded to poly-lactic acid (PLA), nylon-6, and a nylon-6/carbon fiber hybrid via hot pressing. Improvements over 500% and 100% in lap shear strength were observed when bonded to Nylon-6 and Nylon-6/carbon fiber joints, respectively, while no improvements were observed for PLA. Poly (acrylic acid) grafted to the surface of A36 Steel and adhered to a commercial metal joining epoxy adhesive showed an improvement of 49% in lap shear strength. This paper shows that electro-grafting can be used to both supplement existing adhesive bonding techniques but also act as an avenue for tailoring of dissimilar material interfaces and create novel, adhesive free bonding opportunities with thermoplastics.

中文翻译：

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使用原位聚合来增强异种材料的附着力

摘要 异种材料键合是工程中不断考虑的挑战。本文提出了一种通过共价接枝聚合物来定制金属表面的方法，这些聚合物与其各自的不同材料直接互补。将丙烯酸接枝到铝的表面，随后通过热压将其与聚乳酸 (PLA)、尼龙 6 和尼龙 6/碳纤维混合物结合。当与 Nylon-6 和 Nylon-6/碳纤维接头结合时，观察到搭接剪切强度分别提高了 500% 和 100% 以上，而 PLA 没有观察到改进。聚（丙烯酸）接枝到 A36 钢的表面并粘附在商业金属连接环氧树脂粘合剂上，其搭接剪切强度提高了 49%。