A Self-supporting, Surface Carbonized Filter Paper Membrane for Efficient Water-in-Oil Emulsion Separation
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ARTICLE
POLYMER SCIENCE
https://doi.org/10.1007/s10118-020-2492-9 Chinese J. Polym. Sci.
A Self-supporting, Surface Carbonized Filter Paper Membrane for Efficient Water-in-Oil Emulsion Separation Jiang-Yong-Quan Cao, Si-Chong Chen*, Jie Zhang, Yang-Yang Xie, and Yu-Zhong Wang* The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), Sichuan University, College of Chemistry, Sichuan University, Chengdu 610064, China
Electronic Supplementary Information Abstract Due to the important role of oil source in our life, the separation of water-in-oil emulsion is urgent and necessary. Membrane seperation technology has been an efficient and widely used method in separating oil-water separation. Herein, we report a versatile approach to fabricate surface carbonized membranes with self-standing property from biomass-derived precursor by synergistic charring of phytic acid, arginine and filter paper. The obtained membrane exhibited superhydrophobicity in oil, excellent fouling resistance, and self-supporting ability. The membrane can be cycle-used at least 12 times with high permeation flux (up to 1380 L·m−2·h−1) and separation efficiency (up to 99.4%). Keywords Water-in-oil emulsion separation; Filter paper membrane; Surface carbonized; Self-supporting Citation: Cao, J. Y. Q.; Chen, S. C.; Zhang, J.; Xie, Y. Y.; Wang, Y. Z. A self-supporting, surface carbonized filter paper membrane for efficient water-in-oil emulsion separation. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-020-2492-9
INTRODUCTION Oil has been one of the most important resources that human being depends on during the period of social and economic development.[1] Moisture in oil will raise problems such as the damage of oil quality, corroding of equipment and even severe safety accidents.[2] It becomes harder to separate water/oil mixture once water is emulsified in small droplet form in the presence of amphiphilic impurities such as surfactant. Membrane separation technology has the advantages of high separation efficiency, simple operation, no secondary pollution, low energy consumption and so on,[3] which has already been widely used in the field of oil-water separation. Under-oil superhydrophobicity of membrane is the requisite for separating water-in-oil emulsion. Except that, good stability of the membranes under physical or chemical treatment also plays a key role in their practical applications. Conventional membranes include polymeric membranes, metal-mesh membranes, ceramic membranes and so on. Polymeric membranes have the advantages of low cost, good flexibility and easy processing.[4,5] However, the susceptibility to oil pollution of polymer-based membrane inevitably leads to sharp attenuation in separation performance after long-term application. Metal-mesh membranes have excellent physical stability but relatively poor chemical stability,[6] which may gradually be corroded by those components in
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