Bae Kichang, Kang Minju, Shin Yeji, Choi Eunyoung, Kim Young-Mog, Lee Junghoon
Department of Metallurgical Engineering, Pukyong National University, Busan 48513, Republic of Korea.
Dongnam Division, Korea Institute of Industrial Technology, Yangsan 50623, Republic of Korea.
Nanomaterials (Basel). 2023 Feb 22;13(5):807. doi: 10.3390/nano13050807.
Slippery liquid-infused porous surface (SLIPS) realized on commercial materials provides various functionalities, such as corrosion resistance, condensation heat transfer, anti-fouling, de/anti-icing, and self-cleaning. In particular, perfluorinated lubricants infused in fluorocarbon-coated porous structures have showed exceptional performances with durability; however, they caused several issues in safety, due to their difficulty in degradation and bio-accumulation. Here, we introduce a new approach to create the multifunctional lubricant-impregnated surface with edible oils and fatty acid, which are also safe to human body and degradable in nature. The edible oil-impregnated anodized nanoporous stainless steel surface shows a significantly low contact angle hysteresis and sliding angle, which is similar with general surface of fluorocarbon lubricant-infused systems. The edible oil impregnated in the hydrophobic nanoporous oxide surface also inhibits the direct contact of external aqueous solution to a solid surface structure. Due to such de-wetting property caused by a lubricating effect of edible oils, the edible oil-impregnated stainless steel surface shows enhanced corrosion resistance, anti-biofouling and condensation heat transfer with reduced ice adhesion.
在商业材料上实现的注入滑液的多孔表面（SLIPS）具有多种功能，如耐腐蚀、冷凝传热、防污、除冰/防冰和自清洁。特别是，注入全氟润滑剂的碳氟化合物涂层多孔结构表现出了卓越的耐久性；然而，由于其难以降解和生物累积，它们引发了一些安全问题。在此，我们介绍一种用食用油和脂肪酸制造多功能润滑剂浸渍表面的新方法，这些物质对人体也是安全的且在自然环境中可降解。浸渍食用油的阳极氧化纳米多孔不锈钢表面显示出极低的接触角滞后和滑动角，这与注入碳氟化合物润滑剂系统的一般表面相似。浸渍在疏水纳米多孔氧化物表面的食用油还能抑制外部水溶液与固体表面结构的直接接触。由于食用油的润滑作用导致的这种去湿特性，浸渍食用油的不锈钢表面表现出增强的耐腐蚀性、抗生物污损性和冷凝传热性，同时冰附着力降低。
