A slippery oil-repellent hydrogel coating

被引：35
作者：
Lu, Jingwei [1 ]
Zhu, Xiaotao [1 ]
Wang, Bo [1 ]
Liu, Li [1 ]
Song, Yuanming [1 ]
Miao, Xiao [2 ]
Ren, Guina [1 ]
Li, Xiangming [1 ]
机构：
[1] Yantai Univ, Sch Environm & Mat Engn, Yantai 264405, Peoples R China
[2] Liaocheng Univ, Sch Phys Sci & Informat Technol, Shandong Key Lab Opt Commun Sci & Technol, Liaocheng 252000, Shandong, Peoples R China
来源：
CELLULOSE | 2020年 / 27卷 / 05期
关键词：
Antifouling; Superhydrophilic; Slippery; Hydrogel; Oil-repellent; WATER; SURFACES; MESH; WETTABILITY; SEPARATION; FACILE;
D O I：
10.1007/s10570-019-02953-5
中图分类号：
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号：
0805 ; 080502 ; 0822 ;
摘要：
Development of oil-repellent coatings that are anti-fouling with water alone is highly desirable, yet still challenging. Herein, to address this challenge, we fabricate a slippery oil-repellent hydrogel coating that exhibits oil repellency when exposed in the air as well as underwater. In the air, water wets the slippery oil-repellent hydrogel coating surface completely, while organic liquid drops such as toluene can slide off the water wetted coating surface easily. When immersed in water, the slippery oil-repellent hydrogel coating surface exhibits excellent underwater superoleophobic property with all oil contact angles more than 159 degrees and oil adhesive forces less than 1 mu N. The hydrogel coating keeps its oil repellency after long-term outdoor storage, thermal treatment, knife scratching and other treatments. Exploiting its water-attracting and oil-repelling property, the slippery oil-repellent hydrogel coated copper mesh and filter paper are demonstrated as reusable membranes to separate oil-water mixtures with separation efficiency more than 97%. Graphic abstract
引用
收藏
页码：2817 / 2827
页数：11
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