The flexible mucus film and hydrophilic hierarchical micro‐/nanoprotuberance structure on the skin surfaces of marine organisms contribute to an excellent intrinsic antifouling performance. Inspired by this fact, a self‐cleaning mucus‐like and hierarchical ciliary bionic antifouling surface (SMCAS) is designed for marine antifouling based on the electrostatic flocking technology. The results of scanning electron microscopy (SEM) show that the bioinspired SMCAS has a hierarchical micro‐/nanociliary structure and the micrometer array of polyamide (PA) microfibers is covered with the nanometer carbon nanotube/polyvinyl alcohol (CNT/PVA) hydrogel particles. The biomasses of the two marine microoganisms, Nitzschia closterium f. minutissima and Marinobacter lipolyticus SM19 (T), attached on the SMCAS are investigated using a UV–visible spectrophotometer (UV–vis) and SEM. The results reveal that the microoganisms attached on the SMCAS are significantly lower number in comparison with the organic silicon coating. In addition, the SMCAS has a greater ability of stain removal in the dyed petroleum ether washing test. Therefore, the SMCAS demonstrates an extraordinary antifouling performance due to the synergetic effect of the mucus‐like hydrogel film and the hierarchical micro‐/nanostructured micropillars.
In this paper, a fish slime-like coating modified by poly vinyl alcohol/polyacrylamide (PVA/PAAm) hydrogel which is the semi-interpenetrating network polymer was designed. A physical blending method loading PVA/PAAm hydrogels powder into the organic silicon resin was employed to prepare the coating. The oil-resistance of the coating was performed by time-sequence images of washing dyed beef tallow stain away. The results showed that the PVA/PAAm hydrogels modified coating had the greater ability of stain removal. The biomass of a marine microalgae species, Nitzschia closterium and f. minutissima attached on the coating were investigated using UV-Visible Spectrophotometer (UV) and Scanning electron microscopy (SEM). The results showed that the microalgaes showed a significantly lower numbers attached on PVA/PAAm hydrogels modified coating in comparison with on the organic silicon coating.
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