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用于海洋应用的新型紫外光固化聚硅氧烷/微胶囊/银复合涂层增强的防污和抗菌性能

Enhanced antifouling and antibacterial performances of novel UV-curable polysiloxane/microcapsules/Ag composite coatings for marine applications.

作者信息

Liu Ze, Zheng Nan, Liu Jie, Jia Bo, Wang Xiaojun, Yao Pan, Zhang Yayu, Xia Fu, Guo Xinyu

机构信息

Shaanxi Key Laboratory of Catalysis, School of Chemical and Environmental Sciences, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, People's Republic of China.

出版信息

R Soc Open Sci. 2024 Jun 5;11(6):240090. doi: 10.1098/rsos.240090. eCollection 2024 Jun.

DOI:10.1098/rsos.240090
PMID:39100143
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11295885/
Abstract

Marine biological fouling is a widespread phenomenon encountered by various oceanic ships and naval vessels, resulting in enormous economic losses. Herein, novel 4,5-dichloro-2-octyl-isothiazolone@sodium alginate/chitosan microcapsules (DCOIT@ALG/CS) were prepared through composite gel method using DCOIT as core materials, ALG and CS as shells, and CaCl as the cross-linking agent. The formed microcapsules (MCs) with Ag nanoparticles (AgNPs) were then filled in UV-curable polysiloxane (UV-PDMS), followed by UV irradiation to yield UV-PDMS/microcapsules/AgNPs (UV-PDMS/MCs/Ag) composite coatings. The constructed micro-nano dual-scale surface using the MCs and AgNPs improved the antifouling and antibacterial properties of UV-PDMS/MCs/Ag coatings. The as-obtained UV-PDMS/MCs/Ag coatings exhibited a static contact angle of about 160°, shear strength of 2.24 MPa, tensile strength of 3.32 MPa and elongation at break of 212%. The synergistic bacteriostatic effects of DCOIT and AgNPs in UV-PDMS/MCs/Ag coatings resulted in a bactericidal rate of 200 μg ml towards and with saturation at 100% within 10 min. In sum, the proposed composite coatings look promising for future marine transportation, pipeline networks and undersea facilities.

摘要

海洋生物污损是各类海洋船舶和舰艇普遍面临的一种现象，会造成巨大的经济损失。在此，以4,5-二氯-2-辛基异噻唑啉酮（DCOIT）为芯材、海藻酸钠（ALG）和壳聚糖（CS）为壳材、氯化钙为交联剂，通过复合凝胶法制备了新型4,5-二氯-2-辛基异噻唑啉酮@海藻酸钠/壳聚糖微胶囊（DCOIT@ALG/CS）。然后将形成的带有银纳米颗粒（AgNPs）的微胶囊（MCs）填充到紫外光固化聚硅氧烷（UV-PDMS）中，随后进行紫外光照射，得到UV-PDMS/微胶囊/AgNPs（UV-PDMS/MCs/Ag）复合涂层。利用微胶囊和银纳米颗粒构建的微纳双尺度表面提高了UV-PDMS/MCs/Ag涂层的防污和抗菌性能。所制备的UV-PDMS/MCs/Ag涂层的静态接触角约为160°，剪切强度为2.24 MPa，拉伸强度为3.32 MPa，断裂伸长率为212%。UV-PDMS/MCs/Ag涂层中DCOIT和AgNPs的协同抑菌作用导致对大肠杆菌和金黄色葡萄球菌的杀菌率在200 μg/ml时达到100%且在10分钟内达到饱和。总之，所提出的复合涂层在未来海洋运输、管网和海底设施方面看起来很有前景。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9eb3/11295885/70ce46dcbc91/rsos.240090.f008.jpg
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