“From the Nature for the Nature”: An Eco-Friendly Antifouling Coating Consisting of Poly(lactic acid)-Based Polyurethane and Natural Antifoulant

Abstract

“From the nature, for the nature” is an instructive strategy to develop environment-friendly antifouling coatings. In this work, bio-sourced poly­(lactic acid)-based polyurethane with hydrolyzable triisopropylsilyl acrylate (TSA) side groups has been prepared via thiol–ene reaction and polyaddition. Such a polymer exhibits high adhesion strength (∼2.0 MPa) and a controlled degradation rate tuned by varying its soft segment and TSA content. An environment-friendly coating is prepared with the polymer and an eco-friendly antifoulant (butenolide) derived from marine bacteria. Our study shows that butenolide can be released from the coating in continuous manner with a controlled rate as the polymer degrades in seawater. Digital holographic microscopy tracking analysis demonstrates that the coating can effectively inhibit the adhesion of marine bacteria Pseudomonas sp. Marine field test shows that such coating has excellent antifouling ability for more than 3 months.

Recent Progress of Biomimetic Antifouling Surfaces in Marine

“…The compounds of butenolide, terpenoids, steroids, carotenoids, phenolics, alkaloids, and peptides extracted from the marine organisms all showed antifouling activities. [ 13,27 ] Pan et al raised an ideology of “From the Nature for the Nature.” [ 28 ] Butenolide derived from marine bacteria and biodegradable poly(lactic acid) polyurethane derived from crops was fabricated as an environment‐friendly coating. Marine field test was conducted according to ASTM D6990‐05 (2011) method and showed remarkable antifouling ability after immersion in marine for three months.…”

Recent Developments in Biomimetic Antifouling Materials: A Review

“…Pan et al recently tested poly(lactic acid)-based polyurethane with hydrolyzable triisopropylsilyl acrylate side groups, finding that these coatings effectively inhibited the marine bacteria Pseudomonas sp. and that marine field tests demonstrated antifouling ability for more than three months [ 51 ]. Similarly, Myles et al tested bioinspired saccharide coatings on 316L grade stainless steel, nylon 6, and poly(ether sulfone), finding that retained biomass was significantly lower on carbohydrate modified samples, suggesting that these types of coatings may have potential applications in marine environments [ 52 ].…”

Canola Oil based Poly(ester–ether–amide–urethane) Nanocomposite and Its Anti-Corrosive Coatings

“…It is considered as a leading candidate in biology and medicine. LA has been used in coatings, and serves as a starting material of poly (lactic acid) that is used in packaging [ 19 , 20 , 21 , 22 ].…”