Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China.
J Mater Chem B. 2021 Feb 7;9(5):1384-1394. doi: 10.1039/d0tb02465a. Epub 2021 Jan 18.
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 self-healing ability and high elasticity. The modified polymeric coating has low surface energy (24 mJ m) 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.
硅橡胶弹性体涂层由于其环保性质、出色的防污释放能力和减阻性能而受到越来越多的关注。然而，较差的机械性能和缺乏抗污性限制了它们的应用。本文报道了一种含有 2-尿基-4[1H]-嘧啶酮（UPy）和两亲性支链的硅基聚氨酯。UPy 基团和氨酯可以与各种基质形成氢键，使得涂层的附着力显著提高（0.9-3.0 MPa），而与 PDMS 弹性体（0.3-0.4 MPa）相比。此外，UPy 部分之间的四重氢键使聚合物具有优异的自修复能力和高弹性。改性聚合物涂层具有低表面能（24 mJ m）和低弹性模量（1.9 MPa），因此表现出良好的防污释放性能。此外，两亲性侧链可以有效抵抗蛋白质吸附和海洋细菌假单胞菌和硅藻 Navicula incerta 的粘附。这种新的设计可以提高硅酮涂层对生物污垢和机械力的抵抗力，有望成为高性能的防污涂层。
