College of Fashion and Textiles, Shanghai University of Engineering Science, Shanghai 201620, China.
J Nanosci Nanotechnol. 2020 Apr 1;20(4):2292-2300. doi: 10.1166/jnn.2020.17317.
Fluorine-free superhydrophobic cotton fabric was fabricated by coating polyacrylate (PA)/SiO₂ nanocomposite. PA/SiO₂ nanocomposite was prepared based on the modified SiO₂ nanoparticles with double bonds and hexadecyl groups by solution polymerization of butyl acrylate (BA), methyl methacrylate (MMA) and octadecylmethacrylate (OMA). The obtained cotton fabric showed excellent superhydrophobicity with a water contact angle of 152.2±0.4° and a water shedding angle of 8.0±0.2°, due to the simultaneous introduction of surface topography constructed by modified SiO₂ nanoparticles and low surface free energy PA adhesive layer and hexadecyl groups onto cotton fibers. The as-obtained products were characterized by Fourier-transform infrared spectrometry (FT-IR), thermal gravimetric analysis (TG), scanning electron microscopy (SEM) and size distribution analysis. The obtained superhydrophobic fabric coated by PA/SiO₂ demonstrated good mechanical stability and self-cleaning. The PA/SiO₂ coating treatment caused little loss in the tensile strength, breathability, and whiteness of the treated fabric. This approach with improved human/environmental friendliness can pave the potential way for the preparation of superhydrophobic surfaces.
无氟超疏水棉织物是通过涂覆聚丙烯酸酯（PA）/SiO₂纳米复合材料制备的。PA/SiO₂纳米复合材料是基于双键和十六烷基基团改性的 SiO₂纳米粒子，通过丁酯（BA）、甲基丙烯酸甲酯（MMA）和十八烷基甲基丙烯酸酯（OMA）的溶液聚合制备的。由于改性 SiO₂纳米粒子构建的表面形貌、低表面能 PA 胶粘剂层和十六烷基基团同时引入到棉纤维上，所得棉织物表现出优异的超疏水性，水接触角为 152.2±0.4°，水滚落角为 8.0±0.2°。所得到的产物通过傅里叶变换红外光谱（FT-IR）、热重分析（TG）、扫描电子显微镜（SEM）和粒径分布分析进行了表征。所得的 PA/SiO₂涂覆的超疏水织物具有良好的机械稳定性和自清洁性。PA/SiO₂涂层处理对处理后织物的拉伸强度、透气性和白度几乎没有损失。这种提高了的对人类/环境友好的方法可以为制备超疏水表面铺平道路。
