A cross-linked coating decorated mesh prepared by brush-painting method for oil-in-water emulsions separation

作者：Zeng, Xinjuan; Shen, Yuanyuan; Liu, Yongpeng; Du, Jingcheng; Chen, Li; Zhou, Wei; Yang, Hao; Zuo, Jihao; Zhou, Cailong^*; Lin, Jing^*

来源：Materials Chemistry and Physics, 2020, 242: 122541.

DOI：10.1016/j.matchemphys.2019.122541

• Composite materials
• Cross-linking
• Superhydrophilicity
• Underwater superoleophobicity
• Emulsions separation

It is still a challenge to fabricate low-cost, large-scale, and environmentally friendly materials with special wettability for oil/water emulsions separation. Here, a cross-linked poly(vinyl alcohol)/glutaraldehyde/attapulgite/titanium dioxide coating was decorated on stainless steel mesh through a simple brush-painting approach, endowing it with superhydrophilicity/underwater superoleophobicity. The coating filled the mesh pores, achieving oil-in-water emulsions separation by effective "size-sieving" effect. The as-prepared mesh possessed good separation performance with rejection up to 97.5%. Furthermore, it maintained underwater superoleophobicity after 5 meters of abrasion with sandpaper, exhibiting excellent abrasion resistance. All the ingredients of the coating are low-cost and green industrial chemicals, as well as the preparation process is easy to scale-up, making the developed filtration material become a quite potential choice in practical emulsions separation.

• 单位
  佛山科学技术学院; 广州大学; 重庆大学; 武汉工程大学