Bioinspired mechanically tough, high Adhesion, and healable polyurethane coating for high-temperature anti-corrosion and anti-cavitation applications

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2025-05-21 DOI:10.1016/j.apsusc.2025.163584

Haoran Xu , Shunli Wang , Kaijing Hu , Haixu Dou , Pengpeng Lu , Jianfu Wang , Yinsheng Li , Huichao Jin , Limei Tian , Luquan Ren

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Abstract

High-temperature corrosion in marine environments demands advanced protective coatings. Inspired by spider silks and mussels, a mechanically tough, high adhesion and healable polyurethane composite coating (PU-FM) was developed. Specifically, a chain extender (FA-FGE diol) rich in multiple Diels-Alder (DA) furan rings was developed to determine the optimal PU matrix, combined with 1 wt% dopamine-modified multi-walled carbon nanotubes. The abundant DA bonds not only provide thermal stability and compactness of the polymer chain for high-temperature anti-corrosion, but also support the compatibility of self-healing properties. PU-FM exhibited outstanding mechanical properties, with a high toughness of 356MJ·m⁻³, strength of 72 MPa, and adhesion of 16.2 MPa. After 60 h of cavitation, average corrosion depths of PU-FM were only 3.4 nm (20℃) and 8.4n m (80℃). The |Z|_0.01Hz values of PU-FM maintained 1.111 × 10⁹ Ω·cm² (20℃) and 7.361 × 10⁷ Ω·cm² (80℃) after exposed to 3.5 wt% NaCl solutions for 30 d. Moreover, PU-FM also demonstrated 93 % self-healing efficiency under near-infrared light for 90 s, retaining 81 % after three cycles. This approach, combining DA bond-rich chain extenders with nanofiller reinforcement, offers a novel solution for high-temperature anti-corrosion and self-healing coatings, addressing critical challenges in marine and industrial applications.

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仿生机械坚韧，高附着力，可愈合聚氨酯涂层高温防腐和防空化应用

海洋环境中的高温腐蚀需要先进的防护涂层。受蜘蛛丝和贻贝的启发，一种机械韧性、高附着力和可愈合的聚氨酯复合涂层（PU-FM）被开发出来。具体来说，我们开发了一种富含多个diols - alder （DA）呋喃环的扩链剂（FA-FGE diol），并结合1 wt%多巴胺修饰的多壁碳纳米管来确定最佳的PU基质。丰富的DA键不仅为聚合物链提供了高温耐腐蚀的热稳定性和致密性，而且还支持自修复性能的相容性。PU-FM具有优异的力学性能，韧性为356MJ·m−3，强度为72 MPa，附着力为16.2 MPa。空化60 h后，PU-FM的平均腐蚀深度仅为3.4 nm（20℃）和8.4n m（80℃）。Z | | 0.01 hz值1.111 PU-FM维护 × 109Ω·cm2(20℃)和7.361 × 107Ω·cm2暴露后(80℃)3.5 wt %生理盐水解30 d。此外,PU-FM还演示了93 % 90年自愈近红外光下效率 年代,保留81 %经过三个周期。这种方法结合了富含DA键的扩链剂和纳米填充剂增强剂，为高温防腐和自修复涂层提供了一种新的解决方案，解决了船舶和工业应用中的关键挑战。

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.