Self-healing, highly elastic and amphiphilic silicone-based polyurethane for antifouling coatings,Journal of Materials Chemistry B

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Self-healing, highly elastic and amphiphilic silicone-based polyurethane for antifouling coatings
Journal of Materials Chemistry B ( IF 6.1 ) Pub Date : 2020-12-30 , DOI: 10.1039/d0tb02465a
Xiaobin Lin _{1,

2,

3} , Qingyi Xie _{1,

2,

3} , Chunfeng Ma _{1,

2,

3} , Guangzhao Zhang _{1,

2,

3}

Affiliation

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⁻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.

中文翻译：

自修复，高弹性和两亲性硅基聚氨酯，用于防污涂料

有机硅弹性体涂料由于其环保性质，优异的结垢释放能力和减阻性能而受到越来越多的关注。但是，不良的机械性能和抗结垢性限制了它们的应用。在此，报道了具有2-脲基-4 [ 1H ]-嘧啶酮（UPy）和两亲侧链的硅氧烷基聚氨酯。UPy基团和氨基甲酸酯可与各种基材形成氢键，因此与PDMS弹性体（0.3-0.4 MPa）相比，该涂层具有显着改善的粘合强度（0.9-3.0 MPa）。此外，UPy部分之间的四重氢键结合使聚合物具有出色的自愈能力和高弹性。改性聚合物涂层的表面能低（24 mJ m ^-2）和低弹性模量（1.9 MPa），因此具有良好的结垢释放性能。另外，两亲性侧链可以有效抵抗海洋细菌假单胞菌（Pseudomonas sp。）的蛋白质吸附和粘附。和硅藻Navicula incerta。新颖的设计可以提高有机硅涂料对生物结垢和机械力的抵抗力，并有望用于高性能防污涂料。

更新日期：2021-01-18

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