Preparation and properties of superhydrophobic-highly oleophobic SiC membrane

doi:10.16085/j.issn.1000-6613.2023-1195

Abstract

Abstract:

A process was developed to prepare a superhydrophobic-highly oleophobic surface on SiC membrane based on SiO₂ particle blending spraying and immersion method. By spraying SiO₂ particles of different sizes, a micro-nano dual rough structure with amphiphobic capability was created on the surface of the SiC membrane. Then, perfluorodecyltrimethoxysilane was grafted onto the SiC membrane surface through immersion, successfully achieving a SiC membrane with superhydrophobic-highly oleophobic characteristics and excellent self-cleaning performance. The effects of different parameters, such as fluorine content and surface roughness, on surface wettability were analyzed. The modified superhydrophobic-highly oleophobic SiC membrane exhibited the static water contact angle of 152.6°and the static contact angle of n-hexadecane of 146.3°. The sliding angles were measured to be 5.2°and 10.2°, respectively. These properties could be attributed to the micro-nano structure on the SiC membrane surface and the low surface energy material, which reduced the adhesion between the surface and other substances. The superhydrophobic-highly oleophobic SiC membrane also exhibited stable amphiphobicity in strong acid and alkali solutions. This research provided a simple process for constructing superhydrophobic-highly oleophobic surfaces with excellent acid-base resistance on inorganic membranes.

Key words: SiC membrane, spraying, superhydrophobic-highly oleophobic, surface modification, self-cleaning

摘要：

基于SiO₂粒子共混喷涂与浸渍方法，研发了一种在SiC膜上制备超疏水-高疏油表面的工艺。通过喷涂不同粒径的SiO₂颗粒，在SiC膜表面构造具有双疏性能的微纳双重粗糙结构，然后通过浸渍将十七氟癸基三甲氧基硅烷接枝至SiC膜表面，成功制备了具有超疏水-高疏油特性和优异自清洁性能的SiC膜。通过改变含氟量、粗糙度，分析了各参数对表面润湿性的影响。经改性后所得超疏水-高疏油SiC膜表面上水和正十六烷的静态接触角分别为152.6°和146.3°，滚动角分别为5.2°和10.2°，这归因于SiC膜表面的微纳结构和低表面能物质降低了其与其他物质的黏附力。在强酸和强碱溶液中，超疏水-高疏油SiC膜表现出稳定的双疏性。本研究为在无机膜上构建具有优异耐酸碱性的超疏水-高疏油表面提供了一种简便的工艺。

关键词: SiC膜, 喷涂, 超疏水-高疏油, 表面修饰, 自清洁

CLC Number:

LI li, CAI Xinyu, CHEN Yinjie, ZHANG Wenqi, LI Guanghui, RAO Pinhua. Preparation and properties of superhydrophobic-highly oleophobic SiC membrane[J]. Chemical Industry and Engineering Progress, 2024, 43(8): 4516-4522.

李莉, 蔡鑫宇, 陈寅杰, 张文启, 李光辉, 饶品华. 超疏水-高疏油SiC膜的制备及性能[J]. 化工进展, 2024, 43(8): 4516-4522.

Figures/Tables 7

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