由于其在自清洁中的广泛应用,光滑的表面受到追捧,减阻,防污性,增强冷凝,生物医学植入物等.最近,无纹理,全固态,光滑表面由于其优于超排斥表面和注入润滑剂的表面而获得了极大的关注。目前,几乎所有的非纹理,全固态,光滑的表面是疏水的。在这项工作中,我们阐明了非纹理的系统设计,全固态,光滑的亲水(SLIC)表面通过共价接枝聚乙二醇(PEG)刷光滑的基材。此外,我们假设滑溜高于临界接枝密度,当系绳刷大小等于系绳之间的距离时,会发生这种情况。与非光滑亲水表面和光滑疏水表面相比,我们的SLIC表面在冷凝和抗污方面表现出卓越的性能。基于这些结果,SLIC表面构成了新兴的一类表面,有可能使从热流体到生物流体的多种技术领域受益。
Slippery surfaces are sought after due to their wide range of applications in self-cleaning, drag reduction, fouling-resistance, enhanced condensation, biomedical implants etc. Recently, non-textured, all-solid,
slippery surfaces have gained significant attention because of their advantages over super-repellent surfaces and lubricant-infused surfaces. Currently, almost all non-textured, all-solid,
slippery surfaces are hydrophobic. In this work, we elucidate the systematic design of non-textured, all-solid,
slippery hydrophilic (SLIC) surfaces by covalently grafting polyethylene glycol (PEG) brushes to smooth substrates. Furthermore, we postulate a plateau in slipperiness above a critical grafting density, which occurs when the tethered brush size is equal to the inter-tether distance. Our SLIC surfaces demonstrate exceptional performance in condensation and fouling-resistance compared to non-slippery hydrophilic surfaces and
slippery hydrophobic surfaces. Based on these results, SLIC surfaces constitute an emerging class of surfaces with the potential to benefit multiple technological landscapes ranging from thermofluidics to biofluidics.