Evaluation of new marine coatings based on organometallic biocides supported on zeolites under real conditions for biofouling prevention

IF 7.3 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2025-08-29 DOI:10.1016/j.porgcoat.2025.109612

L.F. Montoya , J.B. Canales-Belmar , P.I. Cuello-Moreno , A.F. Jaramillo , N.J. Abreu , G. Sánchez-Sanhueza , K. Fernández , J. Ramírez , M.F. Melendrez

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Abstract

An epoxy-based coating incorporating copper nanoparticle-modified zeolites and capsaicin as a biocide was evaluated. The system was exposed to marine conditions in Talcahuano Bay (Chile) for four months and characterized using atomic force microscopy (AFM), confocal microscopy, and electrochemical impedance spectroscopy (EIS). Antifouling efficacy was determined according to ASTM D3623-78a, with fouling resistance indices above 90 in formulations containing copper and capsaicin. Antimicrobial viability was confirmed through live/dead staining and confocal microscopy, showing 60 % of dead bacteria, whereas 15 % was observed in formulations without biocides. The average contact angle (ASTM D7334-08) was 70°, and the surface was not classified as hydrophobic. Surface roughness, measured by AFM, ranged between 95 and 295 nm. The coating's mechanical properties were evaluated using standardized tests: adhesion (ASTM D4541-22), with maximum tensile loads of approximately 1.5 MPa; flexibility (ASTM D522-17), with fracture lengths less than 22 mm; drawing (ASTM E643-15), with capsaicin formulations reaching 2.99 mm in cup height; and abrasion (ASTM D4060), with wear rates less than 0.3. Finally, the anticorrosive protection was confirmed by EIS, obtaining impedances of ∼10⁵ Ω, supporting the system's effectiveness as a multifunctional antifouling and anticorrosive coating.

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基于沸石负载的有机金属杀菌剂新型海洋涂料在实际条件下的生物污染防治效果评价

研究了一种含纳米铜改性沸石和辣椒素的环氧基杀菌剂涂层。该系统在智利Talcahuano湾的海洋环境中暴露了4个月，并使用原子力显微镜（AFM）、共聚焦显微镜和电化学阻抗谱（EIS）对其进行了表征。根据ASTM D3623-78a测定防污效果，含铜和辣椒素配方的防污指标均在90以上。通过活/死染色和共聚焦显微镜证实了抗菌活性，显示60%的死亡细菌，而在没有杀菌剂的配方中观察到15%的死亡细菌。平均接触角（ASTM D7334-08）为70°，表面不属于疏水性。表面粗糙度，由AFM测量，范围在95和295 nm之间。使用标准化测试评估涂层的机械性能：附着力（ASTM D4541-22），最大拉伸载荷约为1.5 MPa；柔韧性（ASTM D522-17），断裂长度小于22mm；拉伸（ASTM E643-15），辣椒素配方杯高达到2.99 mm；耐磨（ASTM D4060），磨损率小于0.3。最后，通过EIS验证了防腐保护，得到了~ 105 Ω的阻抗，支持了该系统作为多功能防污和防腐涂层的有效性。

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来源期刊

Progress in Organic Coatings 工程技术-材料科学：膜

CiteScore

11.40

自引率

15.20%

发文量

577

审稿时长

48 days

期刊介绍： The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.