| abstract |
The invention provides a bio-based self-healing coating, which is composed of the following raw materials in parts by weight: 80-100 parts of bio-based furan modified epoxy emulsion, 30-40 parts of self-healing microcapsules, and 0.5-1 part of defoamer , 0.5-1 part of antioxidant, 0.5-2 part of water-based curing agent, and 20-30 parts of deionized water; the bio-based furan-modified epoxy emulsion is a mixture of 2,5-furandicarboxylic acid and bisphenol A type The epoxy resin undergoes an esterification reaction in a ratio of (1:3-5) to introduce a carboxyl group, then triethanolamine and an epoxy resin are added in a ratio of (1:3-5) to generate a salt, and then deionized water is added to obtain; the The self-healing microcapsules were prepared by using sodium lignosulfonate as the wall material and N,N′‑4,4′‑diphenylmethane bismaleimide (BMI) as the core material. The bio-based self-healing paint provided by the invention can reduce the dosage of the repairing agent, is conducive to protecting the environment, saving resources and reducing the cost of enterprises, and can self-repair at room temperature. |