Cobweb-Inspired Superhydrophobic Multiscaled Gating Membrane with Embedded Network Structure for Robust Water-in-Oil Emulsion Separation

Xiangde Lin, Moonhyun Choi, Jiwoong Heo, Hyejoong Jeong, Sohyeon Park, Jinkee Hong

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The separation of oil-water mixtures using superwetting membranes is increasingly desired, particularly for the practical processes of environmental protection and industrial production. However, achieving durability and multifunction in current separation systems, among other issues, remains challenging. Herein, a cobweb-inspired gating multiscale pore-based membrane has been created as the framework system for removing emulsified water from an oil phase. This membrane was assembled using macroscale chemically etched stainless steel mesh (ESSM), a microscale network of carbon nanofibers (CNFs), and a nanoscale network of single-walled carbon nanotubes (SWCNTs). Superhydrophobic and superoleophilic interfaces were then fabricated on the ESSM/CNFs-SWCNTs gating membrane using a polydimethylsiloxane (PDMS) coating. The ability of this membrane with a discrete water-repellent property to resist mechanical damage was demonstrated in gravity-driven water-in-oil emulsion separation with high performance; this behavior was attributed to the protective metal mesh and different pore scales resulting from the embedded dual-scale network structure. As a result, this smart superwetting membrane structure can serve as a novel platform for constructing a multifunctional emulsified oil-water separation system with high robustness. Moreover, on the basis of the findings in this study, current filter membranes fabricated using a fibrous network can be improved to achieve higher durability.

Original languageEnglish
Pages (from-to)3448-3455
Number of pages8
JournalACS Sustainable Chemistry and Engineering
Volume5
Issue number4
DOIs
Publication statusPublished - 2017 Apr 3

Fingerprint

emulsion
Emulsions
Oils
membrane
Membranes
Water
oil
Carbon nanofibers
Stainless Steel
Single-walled carbon nanotubes (SWCN)
water
durability
Durability
Stainless steel
steel
Membrane structures
Polydimethylsiloxane
Environmental protection
industrial production
carbon

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment

Cite this

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abstract = "The separation of oil-water mixtures using superwetting membranes is increasingly desired, particularly for the practical processes of environmental protection and industrial production. However, achieving durability and multifunction in current separation systems, among other issues, remains challenging. Herein, a cobweb-inspired gating multiscale pore-based membrane has been created as the framework system for removing emulsified water from an oil phase. This membrane was assembled using macroscale chemically etched stainless steel mesh (ESSM), a microscale network of carbon nanofibers (CNFs), and a nanoscale network of single-walled carbon nanotubes (SWCNTs). Superhydrophobic and superoleophilic interfaces were then fabricated on the ESSM/CNFs-SWCNTs gating membrane using a polydimethylsiloxane (PDMS) coating. The ability of this membrane with a discrete water-repellent property to resist mechanical damage was demonstrated in gravity-driven water-in-oil emulsion separation with high performance; this behavior was attributed to the protective metal mesh and different pore scales resulting from the embedded dual-scale network structure. As a result, this smart superwetting membrane structure can serve as a novel platform for constructing a multifunctional emulsified oil-water separation system with high robustness. Moreover, on the basis of the findings in this study, current filter membranes fabricated using a fibrous network can be improved to achieve higher durability.",
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Cobweb-Inspired Superhydrophobic Multiscaled Gating Membrane with Embedded Network Structure for Robust Water-in-Oil Emulsion Separation. / Lin, Xiangde; Choi, Moonhyun; Heo, Jiwoong; Jeong, Hyejoong; Park, Sohyeon; Hong, Jinkee.

In: ACS Sustainable Chemistry and Engineering, Vol. 5, No. 4, 03.04.2017, p. 3448-3455.

Research output: Contribution to journalArticle

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AU - Hong, Jinkee

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