Comparison of chemical cross-linkers with branched and linear molecular structures for stabilization of graphene oxide membranes, and their performance in ethanol dehydration

Anil Kumar Suri*, Luca Calzavarini, Azeem Bo Strunck, Giuliana Magnacca, Vittorio Boffa

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Resumé

We report the fabrication of cross-linked graphene oxide (GO) membranes and their use for dehydration of ethanol by vapor permeation. Two compounds with branched structures, namely a humic acid-like substance derived from urban waste and a synthetic hyperbranched polyol were used as cross-linkers. Relatively small amounts of branched crosslinkers are able to stabilize GO membranes as compared with a previously reported poly(ethylene glycol) (PEG). Supported crosslinked GO films were prepared by rod coating on polyethersulphone ultrafiltration membrane. The membranes showed a significantly higher permeance for water than ethanol, and the water selectivity factor was found to increase with temperature in the range 30-60°C. with branched crosslinkers showing a higher water flux than PEG, and similar to pristine GO, indicating lesser hindrance to water transport. The membranes were also able to dehydrate ethanol-water mixtures, producing retentates that had an ethanol fraction greater than the azeotropic composition.
OriginalsprogEngelsk
TidsskriftIndustrial & Engineering Chemistry Research
Vol/bind 58
Udgave nummer40
Sider (fra-til)18788-18797
ISSN0888-5885
DOI
StatusUdgivet - 2019

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Graphite
Dehydration
Oxides
Graphene
Molecular structure
Ethanol
Stabilization
Membranes
Water
Polyethylene glycols
Humic Substances
Polyols
Ultrafiltration
Permeation
Oxide films
Vapors
Fluxes
Fabrication
Coatings
Chemical analysis

Citer dette

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title = "Comparison of chemical cross-linkers with branched and linear molecular structures for stabilization of graphene oxide membranes, and their performance in ethanol dehydration",
abstract = "We report the fabrication of cross-linked graphene oxide (GO) membranes and their use for dehydration of ethanol by vapor permeation. Two compounds with branched structures, namely a humic acid-like substance derived from urban waste and a synthetic hyperbranched polyol were used as cross-linkers. Relatively small amounts of branched crosslinkers are able to stabilize GO membranes as compared with a previously reported poly(ethylene glycol) (PEG). Supported crosslinked GO films were prepared by rod coating on polyethersulphone ultrafiltration membrane. The membranes showed a significantly higher permeance for water than ethanol, and the water selectivity factor was found to increase with temperature in the range 30-60°C. with branched crosslinkers showing a higher water flux than PEG, and similar to pristine GO, indicating lesser hindrance to water transport. The membranes were also able to dehydrate ethanol-water mixtures, producing retentates that had an ethanol fraction greater than the azeotropic composition.",
author = "Suri, {Anil Kumar} and Luca Calzavarini and Strunck, {Azeem Bo} and Giuliana Magnacca and Vittorio Boffa",
year = "2019",
doi = "10.1021/acs.iecr.9b01532",
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journal = "Industrial & Engineering Chemistry Research",
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Comparison of chemical cross-linkers with branched and linear molecular structures for stabilization of graphene oxide membranes, and their performance in ethanol dehydration. / Suri, Anil Kumar; Calzavarini, Luca; Strunck, Azeem Bo; Magnacca, Giuliana; Boffa, Vittorio.

I: Industrial & Engineering Chemistry Research, Bind 58, Nr. 40, 2019, s. 18788-18797.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Comparison of chemical cross-linkers with branched and linear molecular structures for stabilization of graphene oxide membranes, and their performance in ethanol dehydration

AU - Suri, Anil Kumar

AU - Calzavarini, Luca

AU - Strunck, Azeem Bo

AU - Magnacca, Giuliana

AU - Boffa, Vittorio

PY - 2019

Y1 - 2019

N2 - We report the fabrication of cross-linked graphene oxide (GO) membranes and their use for dehydration of ethanol by vapor permeation. Two compounds with branched structures, namely a humic acid-like substance derived from urban waste and a synthetic hyperbranched polyol were used as cross-linkers. Relatively small amounts of branched crosslinkers are able to stabilize GO membranes as compared with a previously reported poly(ethylene glycol) (PEG). Supported crosslinked GO films were prepared by rod coating on polyethersulphone ultrafiltration membrane. The membranes showed a significantly higher permeance for water than ethanol, and the water selectivity factor was found to increase with temperature in the range 30-60°C. with branched crosslinkers showing a higher water flux than PEG, and similar to pristine GO, indicating lesser hindrance to water transport. The membranes were also able to dehydrate ethanol-water mixtures, producing retentates that had an ethanol fraction greater than the azeotropic composition.

AB - We report the fabrication of cross-linked graphene oxide (GO) membranes and their use for dehydration of ethanol by vapor permeation. Two compounds with branched structures, namely a humic acid-like substance derived from urban waste and a synthetic hyperbranched polyol were used as cross-linkers. Relatively small amounts of branched crosslinkers are able to stabilize GO membranes as compared with a previously reported poly(ethylene glycol) (PEG). Supported crosslinked GO films were prepared by rod coating on polyethersulphone ultrafiltration membrane. The membranes showed a significantly higher permeance for water than ethanol, and the water selectivity factor was found to increase with temperature in the range 30-60°C. with branched crosslinkers showing a higher water flux than PEG, and similar to pristine GO, indicating lesser hindrance to water transport. The membranes were also able to dehydrate ethanol-water mixtures, producing retentates that had an ethanol fraction greater than the azeotropic composition.

U2 - 10.1021/acs.iecr.9b01532

DO - 10.1021/acs.iecr.9b01532

M3 - Journal article

VL - 58

SP - 18788

EP - 18797

JO - Industrial & Engineering Chemistry Research

JF - Industrial & Engineering Chemistry Research

SN - 0888-5885

IS - 40

ER -