Mérai László, Deák Ágota, Sebők Dániel, Kukovecz Ákos, Dékány Imre, Janovák László
Interdisciplinary Excellence Centre, Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1, H-6720 Szeged, Hungary.
Interdisciplinary Excellence Centre, Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla tér 1, H-6720 Szeged, Hungary.
Polymers (Basel). 2020 Aug 21;12(9):1890. doi: 10.3390/polym12091890.
With the increasing demand for liquid manipulation and microfluidic techniques, surfaces with real-time tunable wetting properties are becoming the focus of materials science researches. In this study, we present a simple preparation method for a 0.5-4 µm carbonyl iron (carbonyl Fe) loaded polydimethylsiloxane (PDMS)-based magnetic composite coating with magnetic field-tailored wetting properties. Moreover, the embedded 6.3-16.7 wt.% Ag-TiO plasmonic photocatalyst (d~50 nm) content provides additional visible light photoreactivity to the external stimuli-responsive composite grass surfaces, while the efficiency of this photocatalytic behavior also turned out to be dependent on the external magnetic field. The inclusion of the photocatalyst introduced hierarchical surface roughness to the micro-grass, resulting in the broadening of the achievable contact and sliding angle ranges. The photocatalyst-infused coatings are also capable of catching and releasing water droplets, which alongside their multifunctional (photocatalytic activity and tunable wetting characteristics) nature makes surfaces of this kind the novel sophisticated tools of liquid manipulation.
随着对液体操控和微流控技术需求的不断增加，具有实时可调润湿性的表面正成为材料科学研究的焦点。在本研究中，我们提出了一种简单的制备方法，用于制备基于聚二甲基硅氧烷（PDMS）的0.5 - 4 µm羰基铁（羰基Fe）负载的磁性复合涂层，该涂层具有磁场定制的润湿性。此外，嵌入的6.3 - 16.7 wt.%银 - 钛等离子体光催化剂（d~50 nm）为外部刺激响应复合草状表面提供了额外的可见光光反应性，而这种光催化行为的效率也被证明取决于外部磁场。光催化剂的加入使微草表面具有分级表面粗糙度，导致可实现的接触角和滑动角范围变宽。注入光催化剂的涂层还能够捕获和释放水滴，其多功能性（光催化活性和可调润湿性）使这类表面成为液体操控的新型精密工具。
