Cobweb-inspired DNA-based membranes for multicomponent pollutant-oil-water emulsions separation

Xiangde Lin, Jiwoong Heo, Jinkee Hong

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Superwetting membranes are increasingly being applied in oil-water separation processes, especially for conventional immiscible mixtures, micro-emulsions, and nano-emulsions. However, in practical water purification processes, these mixtures usually contain other contaminated components, such as inorganic salts, nanoparticles, organic compounds, proteins, and bacteria. Herein, we report for the first time a superwetting membrane prepared from deoxyribonucleic acid (DNA)-based nanofibril materials for creating a multicomponent pollutant-oil-water filtration system. The development of such a system is challenging, considering that matter dispersed in the water phase must be separated by extra filtration process in conventional oil-water separations. The DNA-based membranes can be prepared with thicknesses as small as several tens of nanometers and transferred to a stainless steel mesh to form cobweb-inspired fibrous membranes. The resulting membranes can successfully filter nanoscale model molecules due to their cross-linked DNA fibril-based pores, and can separate oil-water emulsions because of their underwater superoleophobic/low-oil-adhesion properties. Thus, multicomponent pollutant-oil-water emulsions can be purified at a relatively low operation pressure, allowing the separation of water and other components with only one ultra-filtration membrane. The findings in the present work provide a completely novel route for addressing real-world oily wastewater or other mixtures with complicated compositions.

Original languageEnglish
Pages (from-to)870-876
Number of pages7
JournalChemical Engineering Journal
Volume348
DOIs
Publication statusPublished - 2018 Sep 15

Fingerprint

emulsion
Emulsions
Oils
DNA
membrane
Membranes
pollutant
Water
oil
water
Fibrous membranes
Water filtration
inorganic salt
Stainless Steel
Ultrafiltration
ultrafiltration
adhesion
Organic compounds
Purification
organic compound

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

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abstract = "Superwetting membranes are increasingly being applied in oil-water separation processes, especially for conventional immiscible mixtures, micro-emulsions, and nano-emulsions. However, in practical water purification processes, these mixtures usually contain other contaminated components, such as inorganic salts, nanoparticles, organic compounds, proteins, and bacteria. Herein, we report for the first time a superwetting membrane prepared from deoxyribonucleic acid (DNA)-based nanofibril materials for creating a multicomponent pollutant-oil-water filtration system. The development of such a system is challenging, considering that matter dispersed in the water phase must be separated by extra filtration process in conventional oil-water separations. The DNA-based membranes can be prepared with thicknesses as small as several tens of nanometers and transferred to a stainless steel mesh to form cobweb-inspired fibrous membranes. The resulting membranes can successfully filter nanoscale model molecules due to their cross-linked DNA fibril-based pores, and can separate oil-water emulsions because of their underwater superoleophobic/low-oil-adhesion properties. Thus, multicomponent pollutant-oil-water emulsions can be purified at a relatively low operation pressure, allowing the separation of water and other components with only one ultra-filtration membrane. The findings in the present work provide a completely novel route for addressing real-world oily wastewater or other mixtures with complicated compositions.",
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Cobweb-inspired DNA-based membranes for multicomponent pollutant-oil-water emulsions separation. / Lin, Xiangde; Heo, Jiwoong; Hong, Jinkee.

In: Chemical Engineering Journal, Vol. 348, 15.09.2018, p. 870-876.

Research output: Contribution to journalArticle

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