溶解刻蚀辅助构建棉织物超疏水表面

Construction of superhydrophobic surface of cotton fabrics via dissolving etching

为探索超疏水织物的绿色、简便、有效制备方法,先采用聚二甲基硅氧烷(PDMS)涂层整理获得低表面能棉织物,然后通过盐颗粒的沉积、溶解形成粗糙结构。探讨PDMS用量、盐颗粒尺寸、沉积次数和沉积时间对织物表面超疏水效果的影响。借助接触角测量仪、扫描电子显微镜、X射线衍射能谱等手段对超疏水表面的微观形貌结构、元素组成、稳定性能进行表征。结果表明:棉织物超疏水表面存在微米级凹坑;水滴在织物表面的静态接触角可达155.47°,滑移角为5.5°;将其在强酸、强碱溶液中浸泡12 h,接触角依然可达143.91°;在60℃水浴中浸泡60 min,接触角为144.43°;经20次摩擦循环后,接触角仅下降11.31%。此外,超疏水表面表现出自清洁功能,并具有防染效果。

In order to explor a green,simple and effective preparation method for making superhydrophobic cotton fabrics,polydimethylsiloxane(PDMS)coating was used to finish a cotton fabric with low surface energy,and then the salt particles were deposited and dissolved to form a rough structure.The effects of the amount of PDMS,salt particle size,deposition time and lasting time of the superhydrophobic properties of the fabric were investigated.The microstructure,element composition and stability of the superhydrophobic surface were characterized by of contact angle measuring instrument,scanning electron microscope and X-ray diffraction energy spectrum.The results show that there are micrometer pits on the surface of the cotton fabric.The static water contact angle(WCA)on the fabric surface is found up to 155.47°with the water slip angle of 5.5°.The WCA of the fabric,after immersing in strong acid and strong alkali solution for 12 h,still reaches 143.91°.After soaking the treated fabric in 60℃water for 60 min,the WCA is 144.43°,and the WAC of the fabric drops by 11.31%only after 20 rubbing cycles.In addition,the superhydrophobic surface displays the self-cleaning function and anti-dyeing effect.