Biomimetic Superoleophobicity of Cotton Fabrics for Efficient Oil-Water Separation
Biomimetic Superoleophobicity of Cotton Fabrics for Efficient Oil-Water Separation
复制标题
DOI：
10.1002/admi.201600128
复制
发表时间：
2016-08-19
影响因子：
5.4
通讯作者：
Ma, Peng-Cheng
中科院分区：
文献类型：
--
作者：
Rana, Masud;Chen, Jun-Teng;Ma, Peng-Cheng
纺织材料作为油水分离膜受到了广泛关注。然而，传统的膜在实际应用过程中，要么受到能耗高的制备方法的困扰，要么受到污染的困扰。本文以鱼的仿生表面为研究对象，采用一步热碱处理法对棉织物进行改性，通过去除样品表面的非纤维素化合物，在纤维表面形成微米级和纳米级的粗糙形貌，并通过引入大量的羟基，增强织物的亲水性。所开发的织物显示出水下超疏油性，油接触角大于170度。当纺织品用作油水分离的膜时，水通过织物的孔隙和毛细管迅速渗透，而油由于与水的固有排斥性而被阻挡。棉织物在单一单元重力过滤中表现出高分离效率，优异的可重复使用性，可重复使用性和自清洁性能，用于各种油水混合物，从而使该材料成为有前途的高能效候选物，用于清理溢油。
Textile materials have gained much attention as membranes for oil-water separation. However, traditional membranes are suffered by either energy-intensive preparation method or the fouling during the practical application. Motivated by the biomimetic surface of fish, this paper reports the modification of cotton fabrics using a single-step hot alkali treatment, which creates roughened morphologies in micro- and nanoscale on fiber surface by removing noncellulosic compounds on sample and enhances the hydrophilicity of fabrics due to the introduction of numerous hydroxyl groups in the material. The developed fabrics show underwater superoleophobicity with oil contact angles more than 170 degrees. When the textile is employed as a membrane for oil-water separation, water permeates quickly through the pores and capillary canal of fabrics, whereas oil is obstructed due to the inherent repellency with water. The cotton fabrics demonstrate high separation efficiency, excellent reusability, antifouling, and self-cleaning properties in a single-unit gravimetric filtration for various oil-water mixtures, thus making the material a promising and highly energy-efficient candidate for the cleanup of oil spills.