| CHEN Bao,ZHANG Shilong,ZHANG Dongya,WANG Baoxin,ZHANG Yan,LAN Jianfeng,CHEN Boyi,WU Bo,WU Jianhua.Preparation and Mechanical Properties of Epoxy Modified Polysiloxane Fouling Release Coating[J],53(6):168-182, 221 |
| Preparation and Mechanical Properties of Epoxy Modified Polysiloxane Fouling Release Coating |
| Received:March 06, 2023 Revised:May 15, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.06.015 |
| KeyWord:silicone resin epoxy resin silane modification low surface energy mechanical properties antifouling coating |
| Author | Institution |
| CHEN Bao |
Key Laboratory for Marine Corrosion and Intelligent Protection Materials of Xiamen,School of Marine Engineering, Jimei University, Fujian Xiamen , China |
| ZHANG Shilong |
Key Laboratory for Marine Corrosion and Intelligent Protection Materials of Xiamen,School of Marine Engineering, Jimei University, Fujian Xiamen , China |
| ZHANG Dongya |
Xiamen SunRui Ship Coating Co., Ltd., Fujian Xiamen , China |
| WANG Baoxin |
Key Laboratory for Marine Corrosion and Intelligent Protection Materials of Xiamen,School of Marine Engineering, Jimei University, Fujian Xiamen , China |
| ZHANG Yan |
Key Laboratory for Marine Corrosion and Intelligent Protection Materials of Xiamen,School of Marine Engineering, Jimei University, Fujian Xiamen , China |
| LAN Jianfeng |
Key Laboratory for Marine Corrosion and Intelligent Protection Materials of Xiamen,School of Marine Engineering, Jimei University, Fujian Xiamen , China |
| CHEN Boyi |
Key Laboratory for Marine Corrosion and Intelligent Protection Materials of Xiamen,School of Marine Engineering, Jimei University, Fujian Xiamen , China |
| WU Bo |
Key Laboratory for Marine Corrosion and Intelligent Protection Materials of Xiamen,School of Marine Engineering, Jimei University, Fujian Xiamen , China |
| WU Jianhua |
Key Laboratory for Marine Corrosion and Intelligent Protection Materials of Xiamen,School of Marine Engineering, Jimei University, Fujian Xiamen , China |
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| Abstract: |
| Fouling release coating represented by silicones appears to be a promising non-toxic alternative to the coatings containing biocide or toxic compounds. It has great application prospect and potential in the field of antifouling. However, traditional silicone-polysiloxanes suffer from poor mechanical properties and insufficient adhesion. The work aims to enhance the insufficient mechanical properties and adhesion of silicones. The compatibility of epoxy resin and silicone resin was improved by silane coupling agent reacting with epoxy resin. An antifouling resin coating with improved mechanical properties and fouling release properties was prepared, with silicone resin as matrix resin and epoxy resin as modifier. Firstly, a silanized epoxy resin (ME51) was synthesized by reacting γ-aminopropyltriethoxysilane (APTES) with epoxy resin (E51). Then, the silicone resin (PMPS) was prepared by hydrolysis-condensation method, with methyltrichlorosilane (MTS), dimethyldichlorosilane (DDS) and phenyltrichlorosilane (PTS) as raw materials. Finally, the obtained epoxy-modified silicone resin (MPMPS), which had high mechanical properties and low surface energy characteristics, was obtained by adding ME51 to the PMPS resin and curing at room temperature. The chemical structures of PMPS and MPMPS were characterized by Fourier transform infrared spectroscopy (FT-IR). The coating pencil hardness, flexibility and impact resistance tests were carried out with reference to national standards. The dynamic mechanical properties, glass transition temperature and modulus of the coatings were tested by a dynamic mechanical analyzer (DMA). The surface free energy of the coating was calculated by measuring the contact angle (CA). The 3D topography of the coating surface was observed by confocal laser scanning microscope (CLSM). The surface morphology and element distribution of the coating were analyzed and characterized by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The shallow sea immersion test was carried out with reference to GB/T5370-2007. In order to observe the fouling release properties of the coatings, the test panels were rinsed in the last test. The mechanical properties, adhesion, surface free energy and surface morphology of the epoxy-modified silicone resin coating synthesized in this work were closely related to the epoxy content. When the epoxy content was less than 30wt.%, with the increase of epoxy content, the hardness, flexibility and impact resistance of MPMPS coatings increased. Modulus, glass transition temperature and Tanδ increased. The adhesion of the coating to the substrate was significantly increased. When the epoxy content was greater than 30wt.%, with the increase of epoxy content, the hardness, flexibility, impact resistance and adhesion of MPMPS coating decreased obviously. Modulus, glass transition temperature and Tanδ did not increase significantly. When the epoxy content was 30wt.%, compared with PMPS, the pencil hardness of MPMPS coating increased from HB to 6H, and the impact resistance increased from 30 cm to 60 cm. MPMPS coating flexibility remained at 3 mm. The coating adhesion increased from 1.3 to 3.6 MPa, and the storage modulus at 25 ℃ increased from 206 to 503 MPa. MPMPS coating not only had good mechanical properties, but also had low surface free energy (24.66 mJ/m2). MPMPS showed the same excellent fouling release performance as PMPS in the anti-Bacillus adhesion test, anti-Phaeodactylum tricornutum adhesion test and 90-day shallow sea immersion antifouling test. In summary, an epoxy-modified silicone resin is successfully synthesized. When the epoxy content is 30wt%, the MPMPS coating exhibits the best mechanical properties and antifouling properties. The work provides theoretical support and reference for the application of modified silicone resin in the field of antifouling. |
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