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ABSTRACT
Present study reports the application potential of a natural down fiber in the fields of oil-water separation and interfacial dye adsorption. The dripping experiment shows that the blue water droplets can maintain a spherical shape on the surface of the fiber with a contact angle of 155.8°, while the contact angle of oils was 0°, indicating that the fiber has superhydrophobic and ultralipophilic characteristics. Further studies reveal that this fiber has excellent absorption capacities for various oils with 120.11 g/g (vacuum pump oil), 102.11 g/g (heat transfer oil), 99.27 g/g (engine oil), and oil retention capacities after 24 hours with 94.51%, 94.29% and 92.14% respectively. The oil absorption ratios after ten cycles of use are respectively 52.75%, 60.30%, 64.79% of the initial value. More importantly, as an oil-water separation and interfacial adsorption material, down fiber with a separation efficiency as high as 97.7% and dye removal efficiency are 88.70% (Methylene blue) and 88.39% (Rhodamine B). Therefore, this natural fiber can be used as a recyclable oil-water separation and adsorption material to protect water resources.
摘要
本文研究了天然羽绒纤维在油水分离和界面染料吸附领域的应用潜力。滴水实验表明, 蓝色水滴可以在纤维表面保持球形, 接触角为155.8°, 而油的接触角为0°, 表明该纤维具有超疏水-超亲油性能。进一步研究表明, 羽绒纤维对各类油品具有优异的吸油倍率和保油性能, 分别为120.11 g/g (真空泵油), 102.11 g/g (导热油), 99.27 g/g (机油) ; 同时, 24小时后的保油率分别为94.51%, 94.29%, 92.14%; 10次吸油循环周期后的吸油率仍为初始的52.75%, 60.30%, 64.79%. 更重要的是, 作为油水分离和界面吸附材料, 羽绒纤维的油水分离效率高达97.7%, 染料去除效率分别为88.70% (亚甲基蓝) 和88.39% (罗丹明B). 因此, 这种天然纤维可用作重复使用的油水分离和吸附材料来保护水资源.
Declaration of Competing Interest
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.