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ABSTRACT
The construction of micro/nanohierarchical structures on cellulose-based materials to prepare membranes with special wettability has a promising application. Herein, a simple two-step preparation process, including immersion of the cotton fabric in the copper ammonia solution and drying, was used to grow copper hydroxide (Cu(OH)2) on/in the cotton fibers in a homogeneous reaction, avoiding severe agglomeration of Cu(OH)2 particles and endowing the fabric with superhydrophilicity and underwater superoleophobicity. Driven by gravity, the prepared Cu(OH)2@cotton fabric could be used to separate different oil-water mixtures and oil-in-water emulsions as well as having good mechanical and chemical stability. This simple, low-cost, mass-applicable method offers new perspectives for designing the membrane with special wettability based on cotton fabrics, with promising applications.
摘要
在纤维素基材料上构建微/纳米层次结构以制备具有特殊润湿性的膜具有广阔的应用前景. 在此, 采用简单的两步制备工艺, 包括将棉织物浸泡在铜氨溶液中并干燥, 以均相反应在棉织物上/中生长氢氧化铜 (Cu (OH)2), 避免Cu (OH) 2颗粒严重团聚, 并赋予织物超亲水性和水下超疏水性. 在重力的驱动下, 制备的Cu (OH) 2@cotton织物可用于分离不同的油水混合物和水包油乳液, 并具有良好的机械和化学稳定性. 这种简单, 低成本, 大规模适用的方法为基于棉织物设计具有特殊润湿性的膜提供了新的视角, 具有广阔的应用前景.
Highlights
A facile and efficient strategy was demonstrated for fabricating Cu(OH)2 on cotton fabric surface without adding any chemical adhesives.
The Cu(OH)2 micro/nanohierarchical structure was evenly constructed on both the surface and the inner fibers of the cotton fabric by homogeneous reaction, avoiding the severe agglomeration of Cu(OH)2 particles.
The fabric with superhydrophilic and underwater superoleophobic properties were used for oil/water separation.
Disclosure statement
No potential conflict of interest was reported by the author(s).