材料科学
涂层
生物污染
化学工程
纳米颗粒
聚合物
纳米技术
表面改性
复合材料
超疏水涂料
图层(电子)
接触角
结垢
作者
Hyoung-Jun Kim,Do-Gak Jeung,Jae-Min Oh
标识
DOI:10.1016/j.colsurfb.2020.110788
摘要
Abstract Anti-biofouling treatment is required in various fields such as biomedical application, construction, civil engineering, and so on. Currently available techniques such as lithography and replica methods have several limitations in application and accessibility. We introduced a simple, biocompatible, and cost-effective anti-biofouling dip-coating method with polyurethane-inorganic (anisotropic montmorillonite and spherical TiO2) hybrid coating agent. Layer thickness of coating was as thin as 5 μm. It was cross-confirmed with thickness gauge and cross-section scanning electron microscopy. Through atomic force microscopy, inorganic nanoparticles were observed to be randomly arrayed with particles partially embedded in the polyurethane network. The calculated surface roughness of inorganic-polyurethane hybrid coating was five times larger than the neat substrate film and three times larger than coating without inorganic nanoparticles. Surface energy of the inorganic-polyurethane film decreased with increasing surface roughness as random pattern of inorganic particle reduced van der Waals interaction. Biofouling efficacy was evaluated by mucin adsorption and consecutive alcian blue assay. Results showed that coated film decreased biofouling 81% compared to bare film.
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