The invention relates to the technical field of environment-friendly coatings, in particular to an environment-friendly
coating based on a
plant material and a preparation method of the environment-friendly
coating. The environment-friendly
coating comprises the following raw materials in parts by weight: 25-40 parts of a
plant composition, 20-30 parts of waterborne
epoxy ester resin, 10-20 parts of deionized water, 3-8 parts of radix puerariae residues, 5-10 parts of diatomite, 2-5 parts of
bentonite, 1-3 parts of a
thickening agent, 0.5-2 parts of a dispersing agent and 0.5-2 parts of a defoaming agent. According to the invention, the rich pore structure of the
lotus seedpod
charcoal powder and the
fiber form of the
sisal fibers are interwoven with each other, a stable three-dimensional network is constructed in a paint film, and paint film
cracking caused by local
stress concentration is avoided; meanwhile, the porous characteristic of the resin is cooperated with inorganic fillers such as diatomite and
bentonite, the compactness of a paint film is enhanced, the film-forming property of the resin is optimized by the pomelo peel extract
powder, the
adhesive force of the paint film and a base material is enhanced, the overall flexibility of the paint is improved, and the service life is prolonged.