Yang Qiang, Zhang Zhanping, Qi Yuhong, Zhang Hongyang
Department of Materials Science and Engineering, Dalian Maritime University, Dalian 116026, China.
Polymers (Basel). 2021 Sep 10;13(18):3067. doi: 10.3390/polym13183067.
Fouling-release coatings reinforced with micro-alumina and nano-alumina were prepared based on polydimethylsiloxane (PDMS) containing phenylmethylsilicone oil. The surface properties, mechanical properties, leaching behavior of silicone oil, anti-fouling and drag-reduction performance of the coating were studied. The results show that the addition of alumina can significantly improve the tensile strength, elastic modulus and Shore's hardness of the coating. The adhesion experiments of marine bacteria and show that the addition of alumina can reduce the antifouling performance of the coating, which is related to the stripping mode of fouling organisms. The fouling organisms leave the coating surface by shearing, and the energy required for shearing is proportional to the elastic modulus of the coating. At 800-1400 rpm, the addition of alumina will reduce the drag reduction performance of the coating, which is related to the drag reduction mechanism of PDMS. PDMS counteracts part of the resistance by surface deformation. The larger the elastic modulus is, the more difficult the surface deformation is. The experiment of silicone oil leaching shows that the increase of alumina addition amount and the decrease of particle size will inhibit the leaching of silicone oil.
基于含苯基甲基硅油的聚二甲基硅氧烷（PDMS）制备了用微氧化铝和纳米氧化铝增强的防污涂层。研究了涂层的表面性能、力学性能、硅油的浸出行为、防污和减阻性能。结果表明，添加氧化铝可显著提高涂层的拉伸强度、弹性模量和邵氏硬度。海洋细菌的附着实验表明，添加氧化铝会降低涂层的防污性能，这与污损生物的剥离方式有关。污损生物通过剪切作用离开涂层表面，剪切所需的能量与涂层的弹性模量成正比。在800 - 1400转/分钟时，添加氧化铝会降低涂层的减阻性能，这与PDMS的减阻机制有关。PDMS通过表面变形抵消部分阻力。弹性模量越大，表面变形越困难。硅油浸出实验表明，增加氧化铝添加量和减小粒径会抑制硅油的浸出。
