Thermo-responsive properties of poly(N-isopropylacrylamide-co-acrylic acid) hydrogel and its effect on copper ion removal and fouling of polymer-enhanced ultrafiltration

J. J. Chen; A. L. Ahmad; B. S. Ooi

doi:10.1016/j.memsci.2014.05.062

Thermo-responsive properties of poly(N-isopropylacrylamide-co-acrylic acid) hydrogel and its effect on copper ion removal and fouling of polymer-enhanced ultrafiltration

J. J. Chen, A. L. Ahmad, B. S. Ooi^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

Poly(N-isopropylacrylamide-co-acrylic acid) (PNIPAM-co-AA) hydrogels with thermo-responsive properties were used as water-soluble polymer in a polymer-enhanced ultrafiltration (PEUF) process. The hydrogel-metal complexes were retained by cellulose acetate UF membrane (MWCO=20kDa) and their fouling behaviour were investigated at different pH and temperature. It was found that at lower temperature (<40°C), the retention of copper ion is superior compared to higher operating temperature. It provided more than 98% retention at pH 5 for 50ppm of Cu²⁺ using 0.5gL^-1 PNIPAM-co-AA. Membrane at higher temperature showed the least fouling phenomenon as observed from the drastic increased of permeation flux. At higher temperature, the collapsed hydrogels became more hydrophobic therefore not favouring the interactions with the hydrophilic membrane surface.

Original language	English (US)
Pages (from-to)	73-79
Number of pages	7
Journal	Journal of Membrane Science
Volume	469
DOIs	https://doi.org/10.1016/j.memsci.2014.05.062
State	Published - Nov 1 2014

Keywords

Fouling
Hydrogel
Polymer enhanced ultrafiltration
Thermoresponsive

ASJC Scopus subject areas

Biochemistry
General Materials Science
Physical and Theoretical Chemistry
Filtration and Separation

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title = "Thermo-responsive properties of poly(N-isopropylacrylamide-co-acrylic acid) hydrogel and its effect on copper ion removal and fouling of polymer-enhanced ultrafiltration",

abstract = "Poly(N-isopropylacrylamide-co-acrylic acid) (PNIPAM-co-AA) hydrogels with thermo-responsive properties were used as water-soluble polymer in a polymer-enhanced ultrafiltration (PEUF) process. The hydrogel-metal complexes were retained by cellulose acetate UF membrane (MWCO=20kDa) and their fouling behaviour were investigated at different pH and temperature. It was found that at lower temperature (<40°C), the retention of copper ion is superior compared to higher operating temperature. It provided more than 98% retention at pH 5 for 50ppm of Cu2+ using 0.5gL-1 PNIPAM-co-AA. Membrane at higher temperature showed the least fouling phenomenon as observed from the drastic increased of permeation flux. At higher temperature, the collapsed hydrogels became more hydrophobic therefore not favouring the interactions with the hydrophilic membrane surface.",

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author = "Chen, {J. J.} and Ahmad, {A. L.} and Ooi, {B. S.}",

year = "2014",

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doi = "10.1016/j.memsci.2014.05.062",

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T1 - Thermo-responsive properties of poly(N-isopropylacrylamide-co-acrylic acid) hydrogel and its effect on copper ion removal and fouling of polymer-enhanced ultrafiltration

AU - Chen, J. J.

AU - Ahmad, A. L.

AU - Ooi, B. S.

PY - 2014/11/1

Y1 - 2014/11/1

N2 - Poly(N-isopropylacrylamide-co-acrylic acid) (PNIPAM-co-AA) hydrogels with thermo-responsive properties were used as water-soluble polymer in a polymer-enhanced ultrafiltration (PEUF) process. The hydrogel-metal complexes were retained by cellulose acetate UF membrane (MWCO=20kDa) and their fouling behaviour were investigated at different pH and temperature. It was found that at lower temperature (<40°C), the retention of copper ion is superior compared to higher operating temperature. It provided more than 98% retention at pH 5 for 50ppm of Cu2+ using 0.5gL-1 PNIPAM-co-AA. Membrane at higher temperature showed the least fouling phenomenon as observed from the drastic increased of permeation flux. At higher temperature, the collapsed hydrogels became more hydrophobic therefore not favouring the interactions with the hydrophilic membrane surface.

AB - Poly(N-isopropylacrylamide-co-acrylic acid) (PNIPAM-co-AA) hydrogels with thermo-responsive properties were used as water-soluble polymer in a polymer-enhanced ultrafiltration (PEUF) process. The hydrogel-metal complexes were retained by cellulose acetate UF membrane (MWCO=20kDa) and their fouling behaviour were investigated at different pH and temperature. It was found that at lower temperature (<40°C), the retention of copper ion is superior compared to higher operating temperature. It provided more than 98% retention at pH 5 for 50ppm of Cu2+ using 0.5gL-1 PNIPAM-co-AA. Membrane at higher temperature showed the least fouling phenomenon as observed from the drastic increased of permeation flux. At higher temperature, the collapsed hydrogels became more hydrophobic therefore not favouring the interactions with the hydrophilic membrane surface.

KW - Fouling

KW - Hydrogel

KW - Polymer enhanced ultrafiltration

KW - Thermoresponsive

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SN - 0376-7388

VL - 469

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JO - Journal of Membrane Science

JF - Journal of Membrane Science

ER -

Thermo-responsive properties of poly(N-isopropylacrylamide-co-acrylic acid) hydrogel and its effect on copper ion removal and fouling of polymer-enhanced ultrafiltration

Abstract

Keywords

ASJC Scopus subject areas

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