| ZHANG Xin,HAO Xiaoxian,LIU Wenjing,ZHAO Haichao,ZHENG Wenru,LAN Xijian.Preparation and Antibacterial and Antifouling Properties of Carboxylated Benzisothiazolinone Biocide Loaded NH2-ZIF-7 MOFs[J],53(8):107-118 |
| Preparation and Antibacterial and Antifouling Properties of Carboxylated Benzisothiazolinone Biocide Loaded NH2-ZIF-7 MOFs |
| Received:April 23, 2023 Revised:August 04, 2023 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2024.08.010 |
| KeyWord:metal-organic frameworks 1,2-benzisothiazolin-3-one release antibacterial antifouling coating |
| Author | Institution |
| ZHANG Xin |
Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo , China;College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang , China |
| HAO Xiaoxian |
Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo , China |
| LIU Wenjing |
Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo , China;College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang , China |
| ZHAO Haichao |
Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo , China |
| ZHENG Wenru |
Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo , China |
| LAN Xijian |
Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo , China |
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| Abstract: |
| Marine biofouling, caused by attachment of organism to solid surface, is a worldwide issue that affects the exploitation of marine resources. The use of organic coatings containing various antifoulants is currently the most economical, convenient and effective strategy to solve this problem. In view of the current antifouling agents, the overuse of antifouling agents in the coating at the early stage leads to explosive release, while the release rate stabilizes in the middle and late stages, so its concentration is not sufficient to inhibit the growth of fouling substances. Therefore, how to reduce the amount of antifouling agent used and effectively control the release rate of antifouling agents while ensuring antifouling efficiency is the main research direction in the field of antifouling coatings. In this study, an amine functionalized ZIF-7 (NH2-ZIF-7) metal-organic framework nanocontainers with mesoporous structure were successfully prepared, and a liquid-phase diffusion method was used to effectively capture carboxylated 1,2-Benzoisothiazolin-3-one (BIT-COOH). The morphology of nanoparticles before and after encapsulation of antifouling agent was characterized by SEM and TEM. The successful loading guest molecules in nanocontainers were investigated by FT-IR, XRD, TGA, XPS and their nitrogen adsorption-desorption curve, and the release performance was tested by UV-Vis. The bacteriostatic activity was tested by zone of inhibition method, plate colony counting method and turbidity method. The anti-bacterial/algae adhesion performance of the coating surface was observed by the bio-laser confocal microscope. The results showed that the NH2-ZIF-7 successfully wrapped the BIT-COOH, achieving effective capture and stable release. The inhibition performance against Gram-negative bacteria (E. coli) and Gram-positive bacteria (S.aureus) was significantly higher than that of NH2-ZIF-7 carriers, and the diameter of inhibition zone increased to (21.7± 0.2) and (21.7±0.3) mm, respectively. Further, the antibacterial performance of the acrylic hybrid resin coating loaded with LIVE/DEAD BacLightbacterial viability test kit was used to observe the antibacterial adhesion performance of the acrylic hybrid resin coating surface containing metal organic framework material loading (NH2-ZIF-7@BIT-COOH), showing that the antibacterial adhesion performance of the mixed resin coating with mass fraction 4% (NH2-ZIF-7@BIT-COOH) was significantly better than that of the blank control coating without antifouling agent. In addition, the resin coating with mass fraction 4% (NH2-ZIF-7@BIT-COOH) also exhibited the better antifouling performance. The adhesion rates of Chlorella, Phaeodactylum tricornutum and Isochrysis galbana on the coating surface of the blank group were 11.31%, 58.16% and 49.99%, respectively, while the adhesion area of algae on the surface of the mixed resin coating with mass fraction 4% (NH2-ZIF-7@BIT-COOH) was reduced to 0.06%, 0.05% and 0.05%, respectively. The NH2-ZIF-7 can effectively capture BIT-COOH and release stably, and has excellent antibacterial performance. In addition, the experiment of preventing bacteria/algae adhesion proves that the mixed resin coating provides long-term protection for the marine antifouling coating with anti-biological adhesion through the effective release of the antifouling agent. |
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