Bonding Metals with Two-Component Bio-Resourced Adhesive System

Wenqing Yan*, A. Vahid Movahedi-Rad, Sophie Marie Koch, Sandro Stucki and Lavinia Heisenberg, 
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Abstract

The global metal bonding adhesives market has to shift toward more environmentally friendly and preferably economically superior alternatives to traditional petroleum-based adhesives. Here, we report a two-component biobased adhesive system consisting of epoxidized biobased oils and biobased acids, with five biobased options available for each component category. Our strategy employs a method where two components are blended and melted to form a homogeneous mixture and, then, chemically cross-linked to form a covalent network upon heating. This approach has achieved high adhesive strength under dry and wet conditions for single-lap-joint bonded specimens. The materials tested include aluminum, copper, steel, brass, and molybdenum. Specifically, the lap shear strength of aluminum (1060) joints achieved a result of 6.2 ± 0.8 MPa under dry conditions and 4.4 ± 0.6 MPa under wet conditions.

This study presents a two-component biobased adhesive system for metal bonding, formulated from epoxidized soybean oil and organic acids. It offers high bonding strength, good water resistance, and a reduced carbon footprint.

双组分生物资源粘接系统的金属粘接
全球金属胶粘剂市场必须转向更环保、更经济的传统石油基胶粘剂替代品。在这里,我们报告了一种双组分生物基粘合剂系统,由环氧化生物基油和生物基酸组成,每种组分有五种生物基选择。我们的策略采用了一种方法,将两种成分混合并熔化形成均匀的混合物,然后在加热时化学交联形成共价网络。该方法使单搭接试件在干湿条件下均具有较高的粘接强度。测试的材料包括铝、铜、钢、黄铜和钼。其中,铝(1060)节点的搭接抗剪强度在干燥条件下达到6.2±0.8 MPa,在潮湿条件下达到4.4±0.6 MPa。本研究提出了一种以环氧大豆油和有机酸为原料的双组分生物基金属粘接系统。它提供高粘接强度,良好的耐水性,并减少碳足迹。
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