GOHAL!: sustainable membranes for alcohol dehydration

Vittorio Boffa

GOHAL! sustainable membranes for alcohol dehydration

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Abstract

The rise of graphene oxide (GO) has unlocked a new exciting direction in the development of nanofiltration, desalination and pervaporation membranes. However, there are still high concerns about GO at basic pH and under cross-flow conditions. GO stabilization can be achieved by thermal or chemical reduction; but stacked layers of reduced GO (rGO) tend to form ordered and compact graphite-like structures, thus preventing permeation. Here, a humic acid-like biopolymer (HAL), extracted from organic compost with a yield of ~ 20%, was used to fabricate composite GO-HAL membranes [1]. Both GO and HAL consist of a carbon backbone functionalized with oxygen-containing moieties; but GO dispersions are made of 2D layers with monoatomic thickness, while dispersed HAL macromolecules have a 3D branched structure. We fabricated GO-HAL membranes with HAL contents ranging from 0 to 30 w% by the drop-casting method. Upon thermal stabilization, HAL brings a high degree of disorder to the membrane structure, with the benefit of an increased water permeation rate. The membrane with a biopolymer loading of 30% presented an ideal water/ethanol selectivity of 45 and a water permeance that is 33% higher than the pristine graphene oxide membrane. The enhanced water permeability along with the good water/ethanol selectivity makes the GO-HAL membranes promising devices for alcohol dehydration technologies. This study provides a new basis for the rational design of the future generation of GO-based membranes and offers a new perspective in the exploitation of organic urban waste as source of versatile building blocks in the development of new nanostructured membrane materials. This research was made possible by the financial support from the Danish Council for Independent Research (DFF–6111–00151) and by Mat4Treat, H2020-MSCA-RISE-2014 (n. 64555).

[1] V. Boffa et. al., Carbon-based building blocks for alcohol dehydration membranes with disorder-enhanced water permeability, Carbon, under review.

Original language	English
Title of host publication	Proceeding of the 2017 International Congress on Membranes and Membrane Processes
Publication date	2017
Article number	07.55
Publication status	Published - 2017
Event	2017 International Congress on Membranes and Membrane Processes - http://www.icom2017.org/, San Francisco, United States Duration: 30 Jul 2017 → 4 Aug 2017 http://www.icom2017.org/

Conference

Conference	2017 International Congress on Membranes and Membrane Processes
Location	http://www.icom2017.org/
Country/Territory	United States
City	San Francisco
Period	30/07/2017 → 04/08/2017
Internet address	http://www.icom2017.org/

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title = "GOHAL!: sustainable membranes for alcohol dehydration",

abstract = "The rise of graphene oxide (GO) has unlocked a new exciting direction in the development of nanofiltration, desalination and pervaporation membranes. However, there are still high concerns about GO at basic pH and under cross-flow conditions. GO stabilization can be achieved by thermal or chemical reduction; but stacked layers of reduced GO (rGO) tend to form ordered and compact graphite-like structures, thus preventing permeation. Here, a humic acid-like biopolymer (HAL), extracted from organic compost with a yield of ~ 20%, was used to fabricate composite GO-HAL membranes [1]. Both GO and HAL consist of a carbon backbone functionalized with oxygen-containing moieties; but GO dispersions are made of 2D layers with monoatomic thickness, while dispersed HAL macromolecules have a 3D branched structure. We fabricated GO-HAL membranes with HAL contents ranging from 0 to 30 w% by the drop-casting method. Upon thermal stabilization, HAL brings a high degree of disorder to the membrane structure, with the benefit of an increased water permeation rate. The membrane with a biopolymer loading of 30% presented an ideal water/ethanol selectivity of 45 and a water permeance that is 33% higher than the pristine graphene oxide membrane. The enhanced water permeability along with the good water/ethanol selectivity makes the GO-HAL membranes promising devices for alcohol dehydration technologies. This study provides a new basis for the rational design of the future generation of GO-based membranes and offers a new perspective in the exploitation of organic urban waste as source of versatile building blocks in the development of new nanostructured membrane materials. This research was made possible by the financial support from the Danish Council for Independent Research (DFF–6111–00151) and by Mat4Treat, H2020-MSCA-RISE-2014 (n. 64555).[1] V. Boffa et. al., Carbon-based building blocks for alcohol dehydration membranes with disorder-enhanced water permeability, Carbon, under review. ",

author = "Vittorio Boffa",

year = "2017",

language = "English",

booktitle = "Proceeding of the 2017 International Congress on Membranes and Membrane Processes",

note = "2017 International Congress on Membranes and Membrane Processes, ICOM 2017 ; Conference date: 30-07-2017 Through 04-08-2017",

url = "http://www.icom2017.org/",

}

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T1 - GOHAL!

T2 - 2017 International Congress on Membranes and Membrane Processes

AU - Boffa, Vittorio

PY - 2017

Y1 - 2017

N2 - The rise of graphene oxide (GO) has unlocked a new exciting direction in the development of nanofiltration, desalination and pervaporation membranes. However, there are still high concerns about GO at basic pH and under cross-flow conditions. GO stabilization can be achieved by thermal or chemical reduction; but stacked layers of reduced GO (rGO) tend to form ordered and compact graphite-like structures, thus preventing permeation. Here, a humic acid-like biopolymer (HAL), extracted from organic compost with a yield of ~ 20%, was used to fabricate composite GO-HAL membranes [1]. Both GO and HAL consist of a carbon backbone functionalized with oxygen-containing moieties; but GO dispersions are made of 2D layers with monoatomic thickness, while dispersed HAL macromolecules have a 3D branched structure. We fabricated GO-HAL membranes with HAL contents ranging from 0 to 30 w% by the drop-casting method. Upon thermal stabilization, HAL brings a high degree of disorder to the membrane structure, with the benefit of an increased water permeation rate. The membrane with a biopolymer loading of 30% presented an ideal water/ethanol selectivity of 45 and a water permeance that is 33% higher than the pristine graphene oxide membrane. The enhanced water permeability along with the good water/ethanol selectivity makes the GO-HAL membranes promising devices for alcohol dehydration technologies. This study provides a new basis for the rational design of the future generation of GO-based membranes and offers a new perspective in the exploitation of organic urban waste as source of versatile building blocks in the development of new nanostructured membrane materials. This research was made possible by the financial support from the Danish Council for Independent Research (DFF–6111–00151) and by Mat4Treat, H2020-MSCA-RISE-2014 (n. 64555).[1] V. Boffa et. al., Carbon-based building blocks for alcohol dehydration membranes with disorder-enhanced water permeability, Carbon, under review.

AB - The rise of graphene oxide (GO) has unlocked a new exciting direction in the development of nanofiltration, desalination and pervaporation membranes. However, there are still high concerns about GO at basic pH and under cross-flow conditions. GO stabilization can be achieved by thermal or chemical reduction; but stacked layers of reduced GO (rGO) tend to form ordered and compact graphite-like structures, thus preventing permeation. Here, a humic acid-like biopolymer (HAL), extracted from organic compost with a yield of ~ 20%, was used to fabricate composite GO-HAL membranes [1]. Both GO and HAL consist of a carbon backbone functionalized with oxygen-containing moieties; but GO dispersions are made of 2D layers with monoatomic thickness, while dispersed HAL macromolecules have a 3D branched structure. We fabricated GO-HAL membranes with HAL contents ranging from 0 to 30 w% by the drop-casting method. Upon thermal stabilization, HAL brings a high degree of disorder to the membrane structure, with the benefit of an increased water permeation rate. The membrane with a biopolymer loading of 30% presented an ideal water/ethanol selectivity of 45 and a water permeance that is 33% higher than the pristine graphene oxide membrane. The enhanced water permeability along with the good water/ethanol selectivity makes the GO-HAL membranes promising devices for alcohol dehydration technologies. This study provides a new basis for the rational design of the future generation of GO-based membranes and offers a new perspective in the exploitation of organic urban waste as source of versatile building blocks in the development of new nanostructured membrane materials. This research was made possible by the financial support from the Danish Council for Independent Research (DFF–6111–00151) and by Mat4Treat, H2020-MSCA-RISE-2014 (n. 64555).[1] V. Boffa et. al., Carbon-based building blocks for alcohol dehydration membranes with disorder-enhanced water permeability, Carbon, under review.

UR - http://www.che.utoledo.edu/icom2017/programbook.pdf

M3 - Conference abstract in proceeding

BT - Proceeding of the 2017 International Congress on Membranes and Membrane Processes

Y2 - 30 July 2017 through 4 August 2017

ER -

GOHAL! sustainable membranes for alcohol dehydration

Abstract

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