Electrically conducting nanofiltration membranes based on networked cellulose and carbon nanostructures

Farah Ejaz Ahmed, Boor Singh Lalia, Nidal Hilal, Raed Hashaikeh

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Electrically enhanced fouling control is increasingly applied to membrane-based separation and requires conducting membranes with controlled properties. In this work, electrically conductive membranes based on networked cellulose (NC) and carbon nanostructures (CNS) were fabricated via vacuum filtration, followed by drying at 40°C. The morphology, structure, mechanical and electrochemical properties of these NC-CNS membranes were characterized and compared with CNS membranes. The effect of incorporating NC on the electrocatalytic activity has been analyzed. It is found that networked cellulose helps to decrease the contact angle of water from 105° to 73°. It is also found that the improved surface hydrophilicity of CNS-NC membrane assists the regeneration of electrode surface during electrolysis process. Networked cellulose yields a more dense structure with the tensile strength exceeding ten times that of CNS alone. The compaction of pore structure via incorporation of NC translates into promising results with respect to nanofiltration of divalent ions, with a rejection efficiency of 60% for MgSO4 and 47% for CaCl2, while maintaining a high flux ≥100Lm-2 h-1, making them suitable for pretreatment of RO feeds.

Original languageEnglish
JournalDesalination
DOIs
Publication statusAccepted/In press - 6 Mar 2016
Externally publishedYes

Fingerprint

Nanofiltration membranes
Cellulose
cellulose
Nanostructures
Carbon
membrane
Membranes
carbon
Nanofiltration
Hydrophilicity
Pore structure
Fouling
Electrochemical properties
tensile strength
Electrolysis
fouling
Contact angle
compaction
electrokinesis
Drying

Keywords

  • Carbon nanostructures
  • Cellulose
  • Electrical conductivity
  • Fouling
  • Hydrophilic

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Water Science and Technology
  • Mechanical Engineering

Cite this

Electrically conducting nanofiltration membranes based on networked cellulose and carbon nanostructures. / Ahmed, Farah Ejaz; Lalia, Boor Singh; Hilal, Nidal; Hashaikeh, Raed.

In: Desalination, 06.03.2016.

Research output: Contribution to journalArticle

Ahmed, Farah Ejaz ; Lalia, Boor Singh ; Hilal, Nidal ; Hashaikeh, Raed. / Electrically conducting nanofiltration membranes based on networked cellulose and carbon nanostructures. In: Desalination. 2016.
@article{c91e9c02b5ce4ac6bafb20ff06c2bcdb,
title = "Electrically conducting nanofiltration membranes based on networked cellulose and carbon nanostructures",
abstract = "Electrically enhanced fouling control is increasingly applied to membrane-based separation and requires conducting membranes with controlled properties. In this work, electrically conductive membranes based on networked cellulose (NC) and carbon nanostructures (CNS) were fabricated via vacuum filtration, followed by drying at 40°C. The morphology, structure, mechanical and electrochemical properties of these NC-CNS membranes were characterized and compared with CNS membranes. The effect of incorporating NC on the electrocatalytic activity has been analyzed. It is found that networked cellulose helps to decrease the contact angle of water from 105° to 73°. It is also found that the improved surface hydrophilicity of CNS-NC membrane assists the regeneration of electrode surface during electrolysis process. Networked cellulose yields a more dense structure with the tensile strength exceeding ten times that of CNS alone. The compaction of pore structure via incorporation of NC translates into promising results with respect to nanofiltration of divalent ions, with a rejection efficiency of 60{\%} for MgSO4 and 47{\%} for CaCl2, while maintaining a high flux ≥100Lm-2 h-1, making them suitable for pretreatment of RO feeds.",
keywords = "Carbon nanostructures, Cellulose, Electrical conductivity, Fouling, Hydrophilic",
author = "Ahmed, {Farah Ejaz} and Lalia, {Boor Singh} and Nidal Hilal and Raed Hashaikeh",
year = "2016",
month = "3",
day = "6",
doi = "10.1016/j.desal.2016.09.005",
language = "English",
journal = "Desalination",
issn = "0011-9164",
publisher = "Elsevier",

}

TY - JOUR

T1 - Electrically conducting nanofiltration membranes based on networked cellulose and carbon nanostructures

AU - Ahmed, Farah Ejaz

AU - Lalia, Boor Singh

AU - Hilal, Nidal

AU - Hashaikeh, Raed

PY - 2016/3/6

Y1 - 2016/3/6

N2 - Electrically enhanced fouling control is increasingly applied to membrane-based separation and requires conducting membranes with controlled properties. In this work, electrically conductive membranes based on networked cellulose (NC) and carbon nanostructures (CNS) were fabricated via vacuum filtration, followed by drying at 40°C. The morphology, structure, mechanical and electrochemical properties of these NC-CNS membranes were characterized and compared with CNS membranes. The effect of incorporating NC on the electrocatalytic activity has been analyzed. It is found that networked cellulose helps to decrease the contact angle of water from 105° to 73°. It is also found that the improved surface hydrophilicity of CNS-NC membrane assists the regeneration of electrode surface during electrolysis process. Networked cellulose yields a more dense structure with the tensile strength exceeding ten times that of CNS alone. The compaction of pore structure via incorporation of NC translates into promising results with respect to nanofiltration of divalent ions, with a rejection efficiency of 60% for MgSO4 and 47% for CaCl2, while maintaining a high flux ≥100Lm-2 h-1, making them suitable for pretreatment of RO feeds.

AB - Electrically enhanced fouling control is increasingly applied to membrane-based separation and requires conducting membranes with controlled properties. In this work, electrically conductive membranes based on networked cellulose (NC) and carbon nanostructures (CNS) were fabricated via vacuum filtration, followed by drying at 40°C. The morphology, structure, mechanical and electrochemical properties of these NC-CNS membranes were characterized and compared with CNS membranes. The effect of incorporating NC on the electrocatalytic activity has been analyzed. It is found that networked cellulose helps to decrease the contact angle of water from 105° to 73°. It is also found that the improved surface hydrophilicity of CNS-NC membrane assists the regeneration of electrode surface during electrolysis process. Networked cellulose yields a more dense structure with the tensile strength exceeding ten times that of CNS alone. The compaction of pore structure via incorporation of NC translates into promising results with respect to nanofiltration of divalent ions, with a rejection efficiency of 60% for MgSO4 and 47% for CaCl2, while maintaining a high flux ≥100Lm-2 h-1, making them suitable for pretreatment of RO feeds.

KW - Carbon nanostructures

KW - Cellulose

KW - Electrical conductivity

KW - Fouling

KW - Hydrophilic

UR - http://www.scopus.com/inward/record.url?scp=84994691932&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84994691932&partnerID=8YFLogxK

U2 - 10.1016/j.desal.2016.09.005

DO - 10.1016/j.desal.2016.09.005

M3 - Article

JO - Desalination

JF - Desalination

SN - 0011-9164

ER -