Department of Chemistry, Purdue University, West Lafayette, IN, USA.
School of Materials Engineering, Purdue University, Neil Armstrong Hall of Engineering, West Lafayette, IN, USA.
Nature. 2023 Sep;621(7978):306-311. doi: 10.1038/s41586-023-06335-7. Epub 2023 Sep 13.
Nearly all adhesives are derived from petroleum, create permanent bonds, frustrate materials separation for recycling and prevent degradation in landfills. When trying to shift from petroleum feedstocks to a sustainable materials ecosystem, available options suffer from low performance, high cost or lack of availability at the required scales. Here we present a sustainably sourced adhesive system, made from epoxidized soy oil, malic acid and tannic acid, with performance comparable to that of current industrial products. Joints can be cured under conditions ranging from use of a hair dryer for 5 min to an oven at 180 °C for 24 h. Adhesion between metal substrates up to around 18 MPa is achieved, and, in the best cases, performance exceeds that of a classic epoxy, the strongest modern adhesive. All components are biomass derived, low cost and already available in large quantities. Manufacturing at scale can be a simple matter of mixing and heating, suggesting that this new adhesive may contribute towards the sustainable bonding of materials.
几乎所有的粘合剂都源自石油，形成永久性的结合，阻碍材料的回收再利用，并防止在垃圾填埋场降解。当试图从石油原料转向可持续的材料生态系统时，可用的选择要么性能低下，要么成本高昂，要么无法在所需的规模上供应。在这里，我们提出了一种可持续来源的粘合剂系统，由环氧大豆油、马来酸和单宁酸制成，其性能可与当前工业产品相媲美。接头可以在从使用吹风机 5 分钟到在 180°C 的烤箱中 24 小时的各种条件下固化。金属基材之间的粘合强度可达 18MPa 左右，在最佳情况下，其性能超过了经典的环氧树脂，这是最强的现代粘合剂。所有成分均源自生物质，成本低廉，且已经大量供应。大规模生产只需简单地混合和加热，这表明这种新型粘合剂可能有助于可持续地粘结材料。
