棉织物纳米银膜超疏水表面制备及其性能分析

Analysis of Superhydrophobic Surface Constructed by Cotton Fabric Combined with Nano-silver and Its Properties

普通棉织物表面呈亲水性,易被污染,不具备分离油水混合物的性能。受“荷叶效应”启发,以棉织物为基底,采用种子生长法在棉织物表面构筑1层纳米银膜,使用十八烷基硫醇修饰,制备出具有超疏水性能的棉织物表面并对其表面性能进行探究,并利用其对水和油相反的润湿性对油-水混合物进行分离测试。结果表明:其分离效率达96%,在连续重复分离22次后仍保持在94%以上;改性后的棉织物表面具有优良的超疏水性(其与水的接触角达160°,表面滚动角小于10°)、耐污性及稳定性,可作为一种有效的油水分离材料。

The surface of ordinary cotton fabric is hydrophilic,easy to be polluted,does not have the performance of separation of oil and water mixture.In this paper,inspired by the“lotus leaf effect”to cotton fabric as the base,using seed growth method to build a layer of nano-silver film on the surface of cotton fabric,and using octyl mercaptan modification,with super hydrophobic performance,its surface properties successfully prepared,and by using the opposite wettability of water and oil the oil-water mixture separated and tested.The results show that the separation efficiency of oil-water mixture reaches 96%,which remains above 94%after 22 repeats of continuous separation.The surface of modified cotton fabric has excellent superhydrophobicity(Its contact angle with water can reach 160 degrees,the surface rolling angle is less than 10 degrees),stain resistance and stability,which can be used as an effective material for oil-water separation.