| HU Zhiwei,GUO Yi,DONG Lijie.Preparation and Antifouling Properties of SEBS/sCFO Composite[J],53(20):223-231 |
| Preparation and Antifouling Properties of SEBS/sCFO Composite |
| Received:October 29, 2023 Revised:March 15, 2024 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2024.20.020 |
| KeyWord:cobalt ferrite benzotriazole poly (styrene ethylene butene styrene) block copolymer spray coating method antifouling |
| Author | Institution |
| HU Zhiwei |
School of Material Science & Engineering, Wuhan University of technology, Wuhan , China |
| GUO Yi |
School of Material Science & Engineering, Wuhan University of technology, Wuhan , China |
| DONG Lijie |
School of Material Science & Engineering, Wuhan University of technology, Wuhan , China |
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| Abstract: |
| Marine transportation efficiency, fuel consumption, and greenhouse gas emissions were deeply affected by biofouling, which has caused huge economic losses. Diatoms are the main species that form microbial membranes in biofouling, and their adhesion on the hull surface can induce the adhesion of large fouling organisms. Spraying organic composite coating on ship hulls can effectively reduce the attachment of fouling organisms, which is a relatively economical and efficient prevention method. Composite materials, used for hull antifouling, are mainly divided into biocide coating and fouling release coating. The biocide coating relies on biocidal agents in the substrate to prevent fouling organisms from growing on the material surface. The fouling release coating can facilitate the removal of fouling organisms by weakening their adhesion to the material surface. Materials with microstructures on the surface are a kind of fouling release coating, such as lotus leaves, shark skin, which usually have good anti-fouling performance. This material can reduce the adhesion of fouling organisms without adding biocides, which is friendly to the marine environment. However, the preparation process of the microstructure-surface materials is usually difficult, generally including template method, etching method, induction method and so on. It is difficult to have large-scale production. It is of great significance to develop new antifouling coating with the special microstructures on the surface. Block copolymers are composed of two or more kinds of chain segments, and their surfaces are convex and concave at micrometer and nanometer level due to microphase separation. SEBS has stable chemical properties and good aging resistance. The surface morphology of the coating can be secondarily induced by mixing nano-filler in the SEBS block copolymer, which is expected to further improve the antifouling performance of the coating. Cobalt ferrite/benzotriazole nanospheres (sCFO) were synthesized by a solvotherm and one-step adsorption method. Consequently, the sCFO was added into SEBS to prepare antifouling composite coating via a spraying method. The microscopic morphology, crystal structure and chemical composition of sCFO were observed by transmission electron microscope, X-ray diffractometer, Fourier transform infrared spectrometer and thermogravimetric analyzer. The effects of sCFO on surface morphology and antifouling performance of SEBS/sCFO composite coatings were analyzed by scanning electron microscopy, protein adsorption experiment and diatom adsorption experiment. The results indicated that the prepared sCFO was spherical, with a size of about 60-70 nm. The saturation magnetization of the nanospheres was 44.7 emu/g, and the content of BTA in sCFO was about 33.0%. The addition of sCFO to the coating induced the folding surface morphology of the SEBS/sCFO composite coating. The composite coating with 4% sCFO had the best anti-protein adsorption ability, and the anti-diatom adsorption performance of the coating was improved. The surface microstructure composite coating has certain anti-protein adsorption and anti-diatom adsorption properties, and the surface morphology is induced by the addition of sCFO nanospheres, which has a good development prospect. |
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