Fast Cross-scale Preparation of Water-repellent Hierarchical Surface via Atmospheric air Plasma for Water-in-oil Emulsion Separation

IF 2.6 3区物理与天体物理 Q3 ENGINEERING, CHEMICAL Plasma Chemistry and Plasma Processing Pub Date : 2024-03-04 DOI:10.1007/s11090-024-10463-x

Xiujin Li, Shuai Liu, Deqi Liu, Ming Lei

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Abstract

Normally, atmospheric air plasma is usually utilized to hydrophilize the substrate surface. In this paper, a facile and fast method is reported to prepare hierarchical superhydrophobic surface via atmospheric air dielectric barrier discharge (DBD) with sealed discharge zone. Siloxane monomers along with silica nanoparticles were used to construct micro-scale hierarchical morphology in gas phase. It is verified that the water repellency of sample could be regulated through adjusting volume and air humidity of discharge zone. The generated reactive oxygen species induced polymerization of long-chain alkyl silane and also caused the grafting of polar groups on substrate surface. Within 5 min, the long-chain alkyl silane coating could rapidly wrap silica nanoparticles layer-by-layer to form microspheres and hence the micro-scale hierarchical morphology. The discharge zone with appropriate sealing volume could balance the grafting amount of polar and nonpolar groups to optimize surface hydrophobicity. After repeating the plasma treatment three times, the sample possessed superhydrophobicity and excellent performance in water-in-oil emulsion separation. The study may offer an environment-friendly method to prepare water-repellent materials for industrial applications.

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通过大气空气等离子体快速跨尺度制备用于油包水型乳液分离的憎水分层表面

通常情况下，利用大气空气等离子体对基底表面进行亲水处理。本文报告了一种简便快速的方法，通过密封放电区的大气空气介质阻挡放电（DBD）制备分层超疏水表面。硅氧烷单体和二氧化硅纳米颗粒被用于在气相中构建微尺度的分层形貌。实验证明，样品的憎水性可以通过调节放电区的体积和空气湿度来调节。产生的活性氧诱导了长链烷基硅烷的聚合，并使极性基团接枝到基底表面。在 5 分钟内，长链烷基硅烷涂层能迅速逐层包裹纳米二氧化硅颗粒，形成微球，从而形成微尺度的分层形貌。具有适当密封体积的放电区可平衡极性和非极性基团的接枝量，从而优化表面疏水性。重复三次等离子处理后，样品具有超疏水性，在油包水乳液分离中表现优异。这项研究可为制备工业用憎水材料提供一种环保方法。

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来源期刊

Plasma Chemistry and Plasma Processing 工程技术-工程：化工

CiteScore

5.90

自引率

8.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Publishing original papers on fundamental and applied research in plasma chemistry and plasma processing, the scope of this journal includes processing plasmas ranging from non-thermal plasmas to thermal plasmas, and fundamental plasma studies as well as studies of specific plasma applications. Such applications include but are not limited to plasma catalysis, environmental processing including treatment of liquids and gases, biological applications of plasmas including plasma medicine and agriculture, surface modification and deposition, powder and nanostructure synthesis, energy applications including plasma combustion and reforming, resource recovery, coupling of plasmas and electrochemistry, and plasma etching. Studies of chemical kinetics in plasmas, and the interactions of plasmas with surfaces are also solicited. It is essential that submissions include substantial consideration of the role of the plasma, for example, the relevant plasma chemistry, plasma physics or plasma–surface interactions; manuscripts that consider solely the properties of materials or substances processed using a plasma are not within the journal’s scope.