A biobased photo-healable thermoset coating has been developed from 4 components in only 2 steps via a solvent-free process involving an epoxy/amine reaction. Its composition includes epoxidized linseed oil and a dynamic molecule (4,4′-diaminodiphenyl disulfide) which, under UV irradiation, can be photolyzed reversibly. Compared to an analogous material without disulfide bond, this coating exhibits a lower crosslinking density and a higher elongation at break. Importantly, a 100 μm depth scratch has been significantly repaired under UV light: a photo-healable coating having both thermoplastic and thermosetting properties has thus been elaborated.

通过基于环氧/胺反应的无溶剂工艺，仅用2个步骤就可以从4种组分中开发出一种基于生物的光固化热固性涂料。其组成包括环氧化亚麻籽油和动态分子（4,4'-二氨基二苯基二硫化物），该分子在紫外线照射下可以可逆地光解。与没有二硫键的类似材料相比，该涂层具有较低的交联密度和较高的断裂伸长率。重要的是，在紫外光下已对深度为100μm的划痕进行了修复：因此，已对具有热塑性和热固性的光固化涂层进行了精心设计。