Sreekantan Srimala, Yong Ang Xue, Basiron Norfatehah, Ahmad Fauziah, De'nan Fatimah
School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal 14300, Pulau Pinang, Malaysia.
School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal 14300, Pulau Pinang, Malaysia.
Polymers (Basel). 2022 Jun 14;14(12):2406. doi: 10.3390/polym14122406.
Superhydrophobic coatings are widely applied in various applications due to their water-repelling characteristics. However, producing a durable superhydrophobic coating with less harmful low surface materials and solvents remains a challenge. Therefore, the aim of this work is to study the effects of three different solvents in preparing a durable and less toxic superhydrophobic coating containing polydimethylsiloxane (PDMS), silica solution (SS), and epoxy resin (DGEBA). A simple sol-gel method was used to prepare a superhydrophobic coating, and a spray-coating technique was employed to apply the superhydrophobic coating on tile substrates. The coated tile substrates were characterized for water contact angle (WCA) and tilting angle (TA) measurements, Field-Emission Scanning Electron Microscopy (FESEM), Atomic Force Microscopy (AFM), and Fourier Transform Infrared Spectroscopy (FTIR). Among 3 types of solvent (acetone, hexane, and isopropanol), a tile sample coated with isopropanol-added solution acquires the highest water contact angle of 152 ± 2° with a tilting angle of 7 ± 2° and a surface roughness of 21.80 nm after UV curing for 24 h. The peel off test showed very good adherence of the isopropanol-added solution coating on tiles. A mechanism for reactions that occur in the best optimized solvent is proposed.
超疏水涂层因其拒水特性而广泛应用于各种领域。然而,用危害较小的低表面材料和溶剂制备耐用的超疏水涂层仍然是一个挑战。因此,本工作的目的是研究三种不同溶剂在制备含有聚二甲基硅氧烷(PDMS)、硅溶胶(SS)和环氧树脂(DGEBA)的耐用且毒性较小的超疏水涂层中的作用。采用简单的溶胶 - 凝胶法制备超疏水涂层,并使用喷涂技术将超疏水涂层涂覆在瓷砖基材上。对涂覆的瓷砖基材进行水接触角(WCA)和倾斜角(TA)测量、场发射扫描电子显微镜(FESEM)、原子力显微镜(AFM)以及傅里叶变换红外光谱(FTIR)表征。在三种类型的溶剂(丙酮、己烷和异丙醇)中,涂覆有添加异丙醇溶液的瓷砖样品在紫外光固化24小时后获得了最高的水接触角152±2°,倾斜角为7±2°,表面粗糙度为21.80 nm。剥离试验表明添加异丙醇溶液的涂层在瓷砖上具有非常好的附着力。提出了在最佳优化溶剂中发生的反应机理。