Polyamide 6.6 separates oil/water due to its dual underwater oleophobicity/underoil hydrophobicity: Role of 2D and 3D porous structures
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Date
2019-02-01
Authors
Zhao, Pei
Qin, Ning
Ren, Carolyn L.
Wen, John Z.
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
Porous polyamide functionalized by plasma or various coatings has been investigated for oil/water separation. In literature, polyamide has rarely been studied for oil removal, and this work investigated the performance of bare polyamide 6.6 (nylon 6.6) in terms of the oil/water separation efficiency and the intrusion pressure, inspiring cost-effective solutions for large-scale oil removal in the industry. Both polyamide meshes possessing two-dimensional (2D) one-layer pores and nonwoven fabrics with three-dimensional (3D) irregular pores were found to be able to separate oil/water with a high efficiency above 98.5%. This finding was attributed to the dual underwater oleophobicity and underoil hydrophobicity of these polyamide samples. The roles of 2D and 3D structures in oil/water separation were illustrated, to provide a new insight into filter designing. Due to its greater intrusion pressure, the 3D netting structure was suggested as being more beneficial for oil/water separation than the 2D structure.
Description
The final publication is available at Elsevier via https://dx.doi.org/10.1016/j.apsusc.2018.10.041 © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
Keywords
Dual underwater oleophobicity and underoil hydrophobicity, Intrusion pressure and contact angle, Meshes and nonwoven fabrics, Oil/water separation, Polyamide 6.6