Colloids and Surfaces A: Physicochemical and Engineering Aspects ( IF 4.9 ) Pub Date : 2023-11-22 , DOI: 10.1016/j.colsurfa.2023.132853 Hongchao Zhang , Junfei Ou , Yajun He , Yating Hu , Fajun Wang , Xinzuo Fang , Wen Li , Alidad Amirfazli
The slippery liquid-infused porous surface (SLIPS) inspired by the Nepenthes plants has received great attention due to the excellent water-repellency with ultra-low sliding angle. However, the practical application of SLIPS is restricted greatly due to the inevitable loss of lubricant trapped by the micro/nanostructures and the adverse environmental impact of the fluorinated lubricant. Herein, we report a simple and efficient strategy to form a solid slippery coating without loss of lubricant. A commercially available coating with the nominal active constituent of polysilazane (PSZ) was used as the matrix and was slippery with the water sliding angle of approx. 25°. To enhance the water repellency, α, ω- hydroxy silicone oil (HSO) was added into the PSZ solution and the sliding angle of the cured composite coating decreased to approx. 7.0°. The chemical interaction between the Si-H / Si-N bonds of PSZ and the -OH group of HSO produced strong inter-molecular attraction. Acrylic resin was further added to strengthen the overall integrity of the coating and the so-obtained composite coating was durable with no loss of lubricant. Moreover, the curing of PSZ at room temperature was accelerated greatly by HSO from longer than one week to less than one day due to the above-mentioned chemical interactions between the Si-H / Si-N bonds and the -OH group. The solid slippery coating showed promising potential in preventing ice adhesion and anti-sticking to adhesive paper due to its low adhesion properties.
中文翻译:
坚固的固体光滑涂层,用于防冰和防粘
受猪笼草植物启发的滑液注入多孔表面(SLIPS)因其优异的防水性和超低滑动角而受到广泛关注。然而,由于微/纳米结构所捕获的润滑剂不可避免的损失以及氟化润滑剂对环境的不利影响,SLIPS的实际应用受到很大限制。在此,我们报告了一种简单而有效的策略,可以在不损失润滑剂的情况下形成固体光滑涂层。使用具有聚硅氮烷 (PSZ) 标称活性成分的市售涂料作为基质,并且具有约 10° 的水滑角,非常光滑。25°。为了增强防水性,将α,ω-羟基硅油(HSO)添加到PSZ溶液中,固化后的复合涂层的滑动角降低至约1°。7.0°。PSZ的Si-H/Si-N键与HSO的-OH基团之间的化学相互作用产生了强烈的分子间吸引力。进一步添加丙烯酸树脂以增强涂层的整体完整性,所得复合涂层耐用且不损失润滑剂。此外,由于上述Si-H/Si-N键和-OH基团之间的化学相互作用,HSO大大加速了PSZ在室温下的固化,从超过一周缩短到不到一天。由于其低粘附性能,固体光滑涂层在防止冰粘附和防粘粘纸方面显示出良好的潜力。