Development of a mechanically robust silicon-based cross-linking polymer for the sustainable marine antifouling coatings

IF 8.6 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies Pub Date : 2024-06-14 DOI:10.1016/j.susmat.2024.e01015

Xiaowei An , Jiannan Chen , Qi Li , Jiyun Tang , Zongkui Li , Liwei Liu , Hui Yang , Chunyang Wei

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引用次数: 0

Abstract

Silicone-based fouling release coatings (FRCs) have shown great promise as an environmentally friendly antifouling technology, while inferior mechanical properties and insufficient substrate adhesion have hindered their further application. We focused on enhancing the mechanical robustness of silicone-based coating through the synergistic effects of hydrogen bonding, π-π aromatic interaction and covalent bonding. The resulting silicone-based coating displayed a low surface energy of 23 mJ/m² and improved mechanical strength and substrate adhesion, offering values up to 6.4 MPa (9.1 times higher) and 2.87 MPa (25.7 times higher), respectively. Additionally, the modified coating demonstrated a tear strength of 9.8 kN/m and mass loss only about 30 mg after enduring 10,000 wear cycles. Alkoxysilane-functionalized polyethylene glycol and quaternary ammonium salt were grafted into the cross-linking structure to make them anchored to the networks and migrated to the surface layer in seawater without releasing. The coating provided 99.1% antibacterial efficiency and effective antidiatom performance (≤ 11.2 cell/mm²). After a 12-month marine field test, the developed film showed only 20% micro bio-fouling compared to 100% fouling coverage on the PDMS surface. By combining improved mechanical properties with antifouling characteristics, this new multifunctional silicone-based FRC exhibits tremendous potential for sustainable marine antifouling coating application.

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为可持续海洋防污涂料开发一种机械坚固的硅基交联聚合物

硅基污垢释放涂层（FRCs）作为一种环境友好型防污技术已显示出巨大的前景，但低劣的机械性能和基底附着力不足阻碍了其进一步应用。我们的研究重点是通过氢键、π-π 芳香族相互作用和共价键的协同作用来增强硅基涂层的机械坚固性。由此产生的硅基涂层具有 23 mJ/m2 的低表面能，并提高了机械强度和基底附着力，其值分别高达 6.4 MPa（高出 9.1 倍）和 2.87 MPa（高出 25.7 倍）。此外，改性涂层的抗撕裂强度为 9.8 kN/m，经受 10,000 次磨损循环后，质量损失仅约为 30 毫克。烷氧基硅烷功能化聚乙二醇和季铵盐被接枝到交联结构中，使其锚定在网络上，并在海水中迁移到表层而不释放。涂层的抗菌效率高达 99.1%，并具有有效的抗iatom 性能（≤ 11.2 cells/mm2）。经过 12 个月的海洋现场测试，与 PDMS 表面 100% 的污垢覆盖率相比，所开发的薄膜仅显示出 20% 的微小生物污垢。这种新型多功能硅基 FRC 结合了更好的机械性能和防污特性，在可持续海洋防污涂层应用方面具有巨大潜力。

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来源期刊

Sustainable Materials and Technologies Energy-Renewable Energy, Sustainability and the Environment

CiteScore

13.40

自引率

4.20%

发文量

158

审稿时长

45 days

期刊介绍： Sustainable Materials and Technologies (SM&T), an international, cross-disciplinary, fully open access journal published by Elsevier, focuses on original full-length research articles and reviews. It covers applied or fundamental science of nano-, micro-, meso-, and macro-scale aspects of materials and technologies for sustainable development. SM&T gives special attention to contributions that bridge the knowledge gap between materials and system designs.