Photoinitiated Thiol–Ene Click Reaction for Preparation of Highly Adhesive and Mechanically Stable Silicone Coatings for Marine Antifouling and Anticorrosion

作者：Zhongshuai Gao, Shuya Zhang, Yanyi Duan, Heng Chang, Mei Cui, Renliang Huang, Rongxin Su · 发表于：ACS Applied Materials & Interfaces · 年份：2025 · DOI：10.1021/acsami.4c18569 · 被引用次数：15 · 研究领域：Marine Biology and Environmental Chemistry、Surface Modification and Superhydrophobicity、Polymer Surface Interaction Studies

Marine biofouling and corrosion have become the main problems affecting the development of the marine industry. Silicone-based coatings have been widely used for antifouling and anticorrosion due to their low surface energy. However, the poor adhesion and low mechanical stability of these materials limit their application in complex marine environments. In this work, we presented a marine antifouling and anticorrosion coating named POSS-DMA@PDMS-TCM through photoinitiated thiol–ene click reaction combined with (mercaptopropyl) methylsiloxane dimethylsiloxane (PDMS-SH), dopamine methacrylamide (DMA), sulfhydryl-functionalized organosiloxanes (POSS-(SH) 8 ), and N -(2,4,6-trichlorophenyl) maleimide (TCM). The POSS-DMA@PDMS-TCM coating exhibited strong stability and bonding ability both in air (2.17 MPa) and underwater (2.11 MPa) when the DMA content was 3 wt %. The high antibacterial (98.1% for Staphylococcus aureus and 99.5% for Escherichia coli ) and antidiatom (94.5%) properties of the POSS-DMA@PDMS-TCM coatings have also been confirmed. Moreover, the POSS-DMA@PDMS-TCM coatings show excellent antifouling abilities in 120-day marine field tests, reducing fouling by 65.5% in comparison to the blank group. The coating also displayed superior anticorrosion performance with E corr values of −0.055 V, I corr values of 7.67 × 10 –6, and R p values of 3.10 × 10 5 Ω for Cu, which benefited from excellent chelating effect and liquid repellency. This study provides a novel strategy for...