海洋工程材料团队
[研究进展]林晓彬同学制备了一种具有自修复、高弹性的双亲有机硅聚氨酯防污涂层(相关成果发表在Journal of Material Chemistry B上)
发布时间: 2021-09-17 浏览次数: 54

Title:Self-healing, highly elastic and amphiphilic silicone-based polyurethane for antifouling coatings




Abstract: Silicone elastomer coatings have attracted increasing attention owing to their eco-friendly nature, excellent fouling release ability and drag-reducing property. However, the poor mechanical properties and lack of fouling resistance limit their applications. Herein, a silicone-based polyurethane with 2-ureido-4[1H]-pyrimidinone (UPy) and amphiphilic pendant chains is reported. The UPy groups and urethane can form hydrogen bonds with various substrates so that the coating has significantly improved adhesion strength (0.9–3.0 MPa) compared with the PDMS elastomer (0.3–0.4 MPa). Moreover, the quadruple hydrogen bonding between UPy moieties allows the polymer to have excellent selfhealing ability and high elasticity. The modified polymeric coating has low surface energy (24 mJ m-2) and low elastic modulus (1.9 MPa), so it exhibits good fouling release performance. Besides, the amphiphilic side chains can effectively resist protein adsorption and adhesion of the marine bacteria Pseudomonas sp. and diatom Navicula incerta. The novel design can improve the resistance of silicone coating to biofouling and mechanical forces and is promising for high-performance antifouling coatings.

 

文章链接:https://pubs.rsc.org/en/content/articlelanding/2021/TB/D0TB02465A