A facile and green route to fabricate fiber-reinforced membrane for removing oil from water and extracting water under slick oil

Kaili Jin; Yaping Zhao; Zhuizhui Fan; Helan Wang; Hong Zhao; Xiqin Huang; Keru Hou; Chengjian Yao; Kongliang Xie; Zaisheng Cai

doi:10.1016/j.jhazmat.2021.125697

A facile and green route to fabricate fiber-reinforced membrane for removing oil from water and extracting water under slick oil

J Hazard Mater. 2021 Aug 15:416:125697. doi: 10.1016/j.jhazmat.2021.125697. Epub 2021 Mar 26.

Authors

Kaili Jin¹, Yaping Zhao², Zhuizhui Fan¹, Helan Wang³, Hong Zhao¹, Xiqin Huang¹, Keru Hou¹, Chengjian Yao⁴, Kongliang Xie², Zaisheng Cai⁵

Affiliations

¹ Key Lab of Science & Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, PR China.
² Key Lab of Science & Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, PR China; College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, PR China.
³ China National Inspection & Testing Centre for Ophthalmic Optic Glass & Enamel Products, Research Institute of Donghua University, Shanghai 201620, China.
⁴ College of Fashion and Textiles, Shanghai University of Engineering Science, Shanghai 201620, PR China.
⁵ Key Lab of Science & Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, PR China; College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, PR China. Electronic address: zshcai@dhu.edu.cn.

PMID: 33823481
DOI: 10.1016/j.jhazmat.2021.125697

Abstract

Except the good separation performance, the membranes used for oil-water mixture separation should be fabricated with as little wastewater produced as possible. Thus, we proposed a green tactic--water vapor induced phase inversion to prepare the high-strength and superhydrophilic/underwater superoleophobic nonwoven fabric-based cotton/PA6/PAN membranes which is based on the polymer/solvent/nonsolvent ternary system analysis. Differing from adding additives in polymer solution or coagulation bath, above proposed strategy has an "subtractive effect" with the advantages of constructing three-dimensional porous structure and greatly reducing the organic wastewater produced during preparation process. Moreover, the obtained cotton/PA6/PAN membranes exhibited unexpected performances for separating oil-in-water emulsions. An ultrahigh permeation flux of up to 478,000 L m^-2 h^-1 bar^-1 with a separation efficiency of > 99.9% was obtained under the driving pressure of 1.6 KPa, which was one order of magnitude higher than the conventional separation membranes with similar properties. In addition, it is surprising that the cotton/PA6/PAN membranes can also extract water from the slick oil/water immiscible mixture. Therefore, it is expected that the cotton/PA6/PAN membranes can be used in practical oily wastewater purification.

Keywords: Cotton/PA6/PAN membranes; Extracting water under slick oil; Phase inversion; Separating oil-water emulsion; Water vapor.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Hydrophobic and Hydrophilic Interactions
Oils
Wastewater
Water Purification*
Water*

Substances

Oils
Waste Water
Water