Construction and properties of micro/nano water repellent surface of modified cotton fabrics

doi:10.19398/j.att.202112057

Abstract

Abstract: In order to prepare washable hydrophobic cotton fabric, the pure cotton woven fabric was used as the matrix, and it was modified with citric acid, and then the silica nano particles were attached to the surface of cotton fabric by impregnation method (two dipping and two rolling) to increase the surface roughness of cotton fabric, and then long-chain alkane hydrophobic groups were introduced to reduce the surface energy of cotton fabric. As a result,the micro/nano water-repellent surface structure was formed under the joint action and hydrophobic cotton fabric was obtained.The structure and particle size distribution of silica sol were characterized by Fourier infrared spectroscopy (FTIR) and laser particle size analyzer, and structural composition, surface elements and morphology of cotton fabric before and after finishing were characterized by field emission scanning electron microscope (SEM) and X-ray electron spectroscopy (XPS).In the meanwhile, the influence of the concentration of citric acid, the concentration of hexadecyltrimethoxysilane (HDTMS), the baking temperature and the baking time on the water contact angle was investigated.Finally, the changes of stain resistance, washing fastness and physical properties of cotton fabric before and after finishing were studied. The results show that when the mass fraction of citric acid is 3%, the mass fraction of hexadecyltrimethoxysilane is 3%, the baking temperature is 140 ℃, and the baking time is 150 s, the water contact angle of the finished fabric is 157.3°,and the surface of the cotton fabric has micro/nano rough structure, the fabric exhibits good water repellency.After 20 times of washing, it can still maintain a good water repellent effect.In addition, the cotton fabric still has good physical properties after hydrophobic treatment.

Key words: sol-gel method, nano silica particles, citric acid, water repellent and stain resistant, cotton fabric

摘要： 为了制备耐洗性疏水棉织物,以纯棉机织物为基体,进行柠檬酸改性处理,通过浸渍法(二浸二轧),使二氧化硅纳米颗粒附着在棉织物表面,增加织物表面粗糙度,再引入长链烷烃疏水基团以降低棉织物表面能,在共同作用下形成微/纳米拒水表面结构,从而获得耐洗性疏水棉织物。利用傅立叶红外光谱仪(FTIR)和激光粒度分析仪测定二氧化硅溶胶的结构和粒径分布,并用场发射扫描电子显微镜(SEM)和X射线电子能谱仪(XPS)表征整理前后棉织物的结构组成、表面元素以及形貌变化,同时考察柠檬酸质量分数、十六烷基三甲氧基硅烷(HDTMS)质量分数、烘焙温度和烘焙时间对织物水接触角的影响,研究棉织物的拒污性、耐水洗牢度以及物理性能在整理前后的变化。结果表明:当柠檬酸的质量分数为3%、十六烷基三甲氧基硅烷的质量分数为3%、烘焙温度为140 ℃、烘焙时间为150 s时,整理后织物的水接触角为157.3°,棉织物表面具有微/纳米粗糙结构;织物表现出良好的拒水性能,经过20次水洗后仍能保持较好的拒水效果;此外,经疏水处理后棉织物仍具有良好的物理性能。

关键词: 溶胶-凝胶法, 纳米SiO₂粒子, 柠檬酸, 拒水抗污, 棉织物

CLC Number:

TS195.2

WU Mingxing, WANGJinqian, GE Yanfang. Construction and properties of micro/nano water repellent surface of modified cotton fabrics[J]. Advanced Textile Technology, 2022, 30(5): 197-205.

吴明星, 汪进前, 盖燕芳. 改性棉织物微/纳米拒水表面的构建及其性能[J]. 现代纺织技术, 2022, 30(5): 197-205.

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