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

    Year: 2020

    Journal: ACS Sustain. Chem. Eng., Volume 8, JAN 27, page 1671–1678

    Authors: Pan, Jiansen; Xie, Qingyi; Chiang, Hoyin; Peng, Qingmei; Qian, Pei-Yuan; Ma, Chunfeng; Zhang, Guangzhao

    Organizations: National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [51673074, 51573061]

    Keywords: Bio-based polymer; poly(lactic acid); natural compound; butenolide; controlled release; antifouling coating

    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 0 polyaddition. Such a polymer exhibits high adhesion strength (similar to 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.
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