Large-area graphene-based nanofiltration membranes by shear alignment of discotic nematic liquid crystals of graphene oxide

Abozar Akbarivakilabadi, Phillip Andrew Sheath, Samuel Martin, Dhanraj B Shinde, Mahdokht Shaibani, Parama Chakraborty Banerjee, Rachel Tkacz, Dibakar Bhattacharyya, Mainak Majumder

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Graphene-based membranes demonstrating ultrafast water transport, precise molecular sieving of gas and solvated molecules shows great promise as novel separation platforms; however, scale-up of these membranes to large-areas remains an unresolved problem. Here we demonstrate that the discotic nematic phase of graphene oxide (GO) can be shear aligned to form highly ordered, continuous, thin films of multi-layered GO on a support membrane by an industrially adaptable method to produce large-area membranes (13x14 cm2) in <5 s. Pressure driven transport data demonstrate high retention (>90%) for charged and uncharged organic probe molecules with a hydrated radius above 5Å as well as modest (30–40%) retention of monovalent and divalent salts. The highly ordered graphene sheets in the plane of the membrane make organized channels and enhance the permeability (71±5lm-2 hr-1 bar-1 for 150±15 nm thick membranes).
Original languageEnglish
Article number10891
Pages (from-to)1 - 12
Number of pages12
JournalNature Communications
Volume7
DOIs
Publication statusPublished - 7 Mar 2016

Cite this

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title = "Large-area graphene-based nanofiltration membranes by shear alignment of discotic nematic liquid crystals of graphene oxide",
abstract = "Graphene-based membranes demonstrating ultrafast water transport, precise molecular sieving of gas and solvated molecules shows great promise as novel separation platforms; however, scale-up of these membranes to large-areas remains an unresolved problem. Here we demonstrate that the discotic nematic phase of graphene oxide (GO) can be shear aligned to form highly ordered, continuous, thin films of multi-layered GO on a support membrane by an industrially adaptable method to produce large-area membranes (13x14 cm2) in <5 s. Pressure driven transport data demonstrate high retention (>90{\%}) for charged and uncharged organic probe molecules with a hydrated radius above 5{\AA} as well as modest (30–40{\%}) retention of monovalent and divalent salts. The highly ordered graphene sheets in the plane of the membrane make organized channels and enhance the permeability (71±5lm-2 hr-1 bar-1 for 150±15 nm thick membranes).",
author = "Abozar Akbarivakilabadi and Sheath, {Phillip Andrew} and Samuel Martin and Shinde, {Dhanraj B} and Mahdokht Shaibani and Banerjee, {Parama Chakraborty} and Rachel Tkacz and Dibakar Bhattacharyya and Mainak Majumder",
year = "2016",
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day = "7",
doi = "10.1038/ncomms10891",
language = "English",
volume = "7",
pages = "1 -- 12",
journal = "Nature Communications",
issn = "2041-1723",
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Large-area graphene-based nanofiltration membranes by shear alignment of discotic nematic liquid crystals of graphene oxide. / Akbarivakilabadi, Abozar; Sheath, Phillip Andrew; Martin, Samuel; Shinde, Dhanraj B; Shaibani, Mahdokht; Banerjee, Parama Chakraborty; Tkacz, Rachel; Bhattacharyya, Dibakar; Majumder, Mainak.

In: Nature Communications, Vol. 7, 10891, 07.03.2016, p. 1 - 12.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

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AU - Akbarivakilabadi, Abozar

AU - Sheath, Phillip Andrew

AU - Martin, Samuel

AU - Shinde, Dhanraj B

AU - Shaibani, Mahdokht

AU - Banerjee, Parama Chakraborty

AU - Tkacz, Rachel

AU - Bhattacharyya, Dibakar

AU - Majumder, Mainak

PY - 2016/3/7

Y1 - 2016/3/7

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AB - Graphene-based membranes demonstrating ultrafast water transport, precise molecular sieving of gas and solvated molecules shows great promise as novel separation platforms; however, scale-up of these membranes to large-areas remains an unresolved problem. Here we demonstrate that the discotic nematic phase of graphene oxide (GO) can be shear aligned to form highly ordered, continuous, thin films of multi-layered GO on a support membrane by an industrially adaptable method to produce large-area membranes (13x14 cm2) in <5 s. Pressure driven transport data demonstrate high retention (>90%) for charged and uncharged organic probe molecules with a hydrated radius above 5Å as well as modest (30–40%) retention of monovalent and divalent salts. The highly ordered graphene sheets in the plane of the membrane make organized channels and enhance the permeability (71±5lm-2 hr-1 bar-1 for 150±15 nm thick membranes).

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