Most of the super hydrophobic cotton fabric surfaces changed the original properties of cotton fabric and cannot be continuously used for oil-water separation. In this paper, the fluorine-containing epoxy polymer P(GMA-r-DFMA) was reacted with KH550 modified nano-SiO₂ to obtain an organic-inorganic hybrid super hydrophobic solution. By dipping process, the super hydrophobic cotton fabric surface was obtained. P(GMA-r-DFMA) can reduce the surface energy of cotton fabric, and modified silica can improve the surface roughness of cotton fabric to achieve super hydrophobic effect. The optimum parameters (polymer concentration, soaking time, drying time and drying temperature) for constructing super hydrophobic cotton fabric surface were explored. The optimal parameters are polymer concentration 5 mg/mL, soaking time 5 h, drying time 4 h, and drying temperature 120 °C. Under the optimal conditions, the water contact angle of the modified cotton fabric surface is 162 ± 3° and the water rolling angle is 10 ± 1°. The study on surface self-cleaning property of modified cotton fabric shows that modified cotton fabric can be restored to clean state after being soiled by toner and washed by deionized water. When the oils were n-hexane, n-octane and trichloromethane, the oil-water separation efficiency of the modified cotton fabric could reach 98 %, 98 % and 96 %, and the effect was stable. The surface of modified cotton fabric has obvious silver mirror phenomenon. The results of Scanning Electron Microscopy showed that the surface of cotton fabric was smooth before modification, but many small bumps and folds were added on the fabric surface after super hydrophobic modification, and the roughness became larger. The super hydrophobic coating is very thin and does not change the color, softness and other properties of the cotton fabric.

大多数超疏水棉织物表面改变了棉织物原有的性能，不能连续用于油水分离。本文将含氟环氧聚合物P(GMA- r -DFMA)与KH550改性纳米SiO ₂反应得到有机-无机杂化超疏水溶液。通过浸渍工艺，获得了超疏水的棉织物表面。P(GMA- r -DFMA)可以降低棉织物的表面能，改性二氧化硅可以改善棉织物的表面粗糙度，达到超疏水效果。探讨了构建超疏水棉织物表面的最佳参数（聚合物浓度、浸泡时间、干燥时间和干燥温度）。最佳参数为聚合物浓度5 mg/mL、浸泡时间5 h、干燥时间4 h、干燥温度120 ℃。在最佳条件下，改性棉织物表面的水接触角为162±3°，水滚动角为10±1°。对改性棉织物表面自洁性能的研究表明，改性棉织物在被碳粉沾污并经去离子水洗涤后能够​​恢复到洁净状态。当油剂为正己烷、正辛烷和三氯甲烷时，改性棉织物的油水分离效率分别可达98%、98%和96%，且效果稳定。改性棉织物表面有明显的银镜现象。扫描电镜结果显示，改性前棉织物表面光滑，但超疏水改性后织物表面增加了许多细小的凹凸和褶皱，粗糙度变大。超疏水涂层非常薄，不会改变棉织物的颜色、柔软度等性能。