Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 439, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2022.129688
Keywords
Robust superhydrophilicity; Surface roughness; Carbon fabric; Oil-water separation; Self-cleaning
Categories
Funding
- Natural Science Foundation of Sichuan Province, China [2022NSFSC0298]
- National Natural Science Foundation of China [51602275, 51762041]
- Guangzhou Panyu Polytechnic Science & Technology, China [2021KJ01]
- Guangdong Colleges & Universities Characteristic Innovation Project, China [2021KTSCX263]
- Guang-dong Education & Scientific Research Project, China [2021GXJK535]
- Research Start-up Funding of Chengdu University, China [2081920016]
- Open Fund of Sichuan Provincial En-gineering Research Center of City Solid Waste Energy and Buliding Materials Conversion and Utilization Technology, China [GF2022ZC007]
- Shiyanjia Lab
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This paper presents a superhydrophobic fiber-based membrane with high separation efficiency and low energy consumption for oil-water separation. The membrane exhibits superhydrophobic/superoleophilic, anti-wetting, and self-cleaning properties due to its unique structure and surface treatment. Additionally, the membrane can maintain its stability under harsh environmental conditions and achieve high separation efficiency for various oil-water mixtures. The recyclability of the membrane also makes it suitable for treating oily wastewater.
The superhydrophobic fiber-based membranes with features of high separation efficiency and low energy con-sumption for oil-water separation remains a formidable challenge. In this paper, a robust and durable super -hydrophobic cotton-derived carbon fabric (CDCF) with wodyetia bifurcate-like structure is fabricated via in situ cobalt-nickel basic carbonate (CNC) deposition and 1 H, 1 H, 2 H, 2 H-perfluorooctyltriethoxysilane (POTS) coating. The combined action of rough surface structure and low surface energy makes CDCF/CNC/POTS with superhydrophobicity/superoleophilicity, anti-wetting, and self-cleaning performance. Intriguingly, the CDCF/ CNC/POTS can keep its superhydrophobicity under of the water droplet impact pressure of 781 Pa. In addition to its robust dynamic superhydrophobicity, CDCF/CNC/POTS can also maintain its non-wetting property under harsh environmental conditions such as mechanical abrasion treatment, acidic, alkaline and salt solutions, and ultraviolet radiation. Importantly, the CDCF/CNC/POTS can separate various oil-water mixtures and emulsions under gravity with ultrahigh oil-water mixtures permeate flux (-19,126 L/m2h), high surfactant-stabilized emulsion permeate flux (-821 L/m2h), and high separation efficiency (> 98.60 %). Moreover, remarkable recyclability endow the CDCF/CNC/POTS with promising application in treating oily wastewater. This work may benefit the low-cost mass production of cotton-based carbon fabrics for developing eco-friendly high-efficiency separators.
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