Abstract
Improving the surface roughness of fabric is one of the main strategies to construct the superhydrophobic surface of cotton fabric. To enhance surface roughness, two ways are used: immobilized inorganic/organic particles on the fabric or etching the fabric using chemical reagents. However, the simple shedding of inorganic/organic particles on the fabric surface leads to limited durability, and the obvious degradation of mechanical properties of finished fabrics caused by etching hinders the application of superhydrophobic cotton fabrics. To address these issues, the current study described a novel technique for etching the surface of cotton fibers using a moderate deep eutectic solvent (DES) comprising choline chloride and oxalic acid. The treated fabric was then covered with epoxidized soybean oil (ESO)-derived thermoset and subsequently modified with stearic acid (STA). Therefore, the modified coatings endow the cotton fabric with durably superhydrophobic properties, good self-cleaning characteristics, and excellent oil-water separation properties. These remarkable characteristics make modified cotton textiles ideal for self-cleaning and oil-water separation.
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