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SiO 2 /silicone hybrid superhydrophobic coating on gypsum-based materials with self-cleaning and moisture resistance
Journal of Sol-Gel Science and Technology ( IF 2.5 ) Pub Date : 2020-06-29 , DOI: 10.1007/s10971-020-05347-3
Qi Jiang , Jian Huang , Baoguo Ma , Zhengcai Yang , Ting Zhang

Gypsum materials are suffering a shortened service life on account of its poor resistance to moisture and dirt. To overcome such drawbacks, the SiO2/silicone hybrid superhydrophobic surface was introduced on the gypsum surface by the cross-linking of siloxane via sol–gel method. In this study, chemical property and microtopography of the coated surface were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and atomic force microscope (AFM), respectively. Wettability and moisture absorption/desorption tests were carried out to evaluate the superhydrophobicity and moisture resistance of the samples. The results showed that the treated gypsum board had a lower moisture absorption/desorption ratio, compared with the untreated gypsum board (PG). Besides, the coating agent prepared with ethanol and hydrophilic nanosilica particles provided good superhydrophobicity and an optimum moisture-resistance property to the gypsum board. The prepared superhydrophobic surface can endow the material with a self-cleaning effect, protecting it from dust and liquid contamination. The effect mechanism of the solvent and silica particle property on the moisture resistance was discussed in detail. Herein, a green approach is proposed to produce a cleaner gypsum product with extended service life.



中文翻译:

具有自清洁和防潮功能的石膏基材料上的SiO 2 /有机硅杂化超疏水涂层

石膏材料由于对湿气和灰尘的抵抗力差而使其使用寿命缩短。为了克服这些缺点,SiO 2硅溶胶/有机硅杂化超疏水表面是通过溶胶-凝胶法通过硅氧烷的交联而引入石膏表面的。在这项研究中,分别通过傅立叶变换红外光谱(FTIR),扫描电子显微镜(SEM)和原子力显微镜(AFM)表征了涂层表面的化学性质和微观形貌。进行了润湿性和吸湿/解吸测试,以评估样品的超疏水性和耐湿性。结果表明,与未处理的石膏板(PG)相比,处理后的石膏板具有较低的吸湿/脱附率。此外,用乙醇和亲水性纳米二氧化硅颗粒制备的涂布剂为石膏板提供了良好的超疏水性和最佳的耐湿性。制备的超疏水表面可以赋予材料自清洁效果,保护其免受灰尘和液体污染。详细讨论了溶剂和二氧化硅颗粒性质对耐湿性的影响机理。在此,提出了一种绿色方法来生产使用寿命更长的更清洁的石膏产品。

更新日期:2020-06-29
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