110th Anniversary

Liquid Separation Membranes Based on Nanowire Substrates for Organic Solvent Nanofiltration and Membrane Distillation

John Chau, Dhananjay Singh, Kamalesh Sirkar

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Ceramic nanowire-based flat porous membranes allow development of organic-inorganic membranes. Two types of surface modifications of alumina nanowire-based membranes were implemented. The first one involved reaction of hydroxyl groups on an alumina surface with silicone oil at a higher temperature, developing a grafted coating yielding a nonporous or a porous hydrophobic membrane. The hydrophobicity was verified via a contact angle comparable to that of a porous hydrophobic ethylene chlorotrifluoroethylene membrane. The membrane porosity was demonstrated by running vacuum membrane distillation with a 1 wt % salt-containing brine. The process yielded satisfactory water vapor flux with 98% salt rejection. The silicone oil's reaction with the alumina surface could also block the pores, yielding a nonporous membrane for organic solvent nanofiltration (OSN). Interfacial polymerization was also carried out on the porous nanowire membrane to yield a nonporous polyamide membrane. The developed membrane was tested for OSN using the dyes Safranin O (MW, 351 g/mol) and Brilliant Blue R (MW, 826 g/mol) in methanol. Rejections of 68.1% and 76.7% were achieved for Safranin O and Brilliant Blue R, respectively, at a relatively low pressure of 551 kPag (80 psig). The methanol permeabilities were higher than those of a few nanofiltration membranes described in the literature.

Original languageEnglish (US)
Pages (from-to)14350-14356
Number of pages7
JournalIndustrial and Engineering Chemistry Research
Volume58
Issue number31
DOIs
StatePublished - Aug 7 2019

Fingerprint

Nanofiltration
Distillation
Organic solvents
Nanowires
Membranes
Liquids
Substrates
Aluminum Oxide
Silicone Oils
Alumina
Silicones
Methanol
Salts
Nanofiltration membranes
Nylons
Steam
Hydrophobicity
Polyamides
Hydroxyl Radical
Water vapor

All Science Journal Classification (ASJC) codes

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

Cite this

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title = "110th Anniversary: Liquid Separation Membranes Based on Nanowire Substrates for Organic Solvent Nanofiltration and Membrane Distillation",
abstract = "Ceramic nanowire-based flat porous membranes allow development of organic-inorganic membranes. Two types of surface modifications of alumina nanowire-based membranes were implemented. The first one involved reaction of hydroxyl groups on an alumina surface with silicone oil at a higher temperature, developing a grafted coating yielding a nonporous or a porous hydrophobic membrane. The hydrophobicity was verified via a contact angle comparable to that of a porous hydrophobic ethylene chlorotrifluoroethylene membrane. The membrane porosity was demonstrated by running vacuum membrane distillation with a 1 wt {\%} salt-containing brine. The process yielded satisfactory water vapor flux with 98{\%} salt rejection. The silicone oil's reaction with the alumina surface could also block the pores, yielding a nonporous membrane for organic solvent nanofiltration (OSN). Interfacial polymerization was also carried out on the porous nanowire membrane to yield a nonporous polyamide membrane. The developed membrane was tested for OSN using the dyes Safranin O (MW, 351 g/mol) and Brilliant Blue R (MW, 826 g/mol) in methanol. Rejections of 68.1{\%} and 76.7{\%} were achieved for Safranin O and Brilliant Blue R, respectively, at a relatively low pressure of 551 kPag (80 psig). The methanol permeabilities were higher than those of a few nanofiltration membranes described in the literature.",
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110th Anniversary : Liquid Separation Membranes Based on Nanowire Substrates for Organic Solvent Nanofiltration and Membrane Distillation. / Chau, John; Singh, Dhananjay; Sirkar, Kamalesh.

In: Industrial and Engineering Chemistry Research, Vol. 58, No. 31, 07.08.2019, p. 14350-14356.

Research output: Contribution to journalArticle

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