N-isopropylacrylamide (NIPAAM) modified cellulose acetate ultrafiltration membranes

Colleen Gorey; Isabel C. Escobar

doi:10.1016/j.memsci.2011.08.066

N-isopropylacrylamide (NIPAAM) modified cellulose acetate ultrafiltration membranes

Colleen Gorey
, Isabel C. Escobar

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

39 Scopus citations

Abstract

A potentially low fouling membrane was developed by attaching a stimuli-responsive polymer layer on the surface, which offered the potential to collapse or expand the polymer layer with change in temperature. The phase change arose from the existence of a lower critical solution temperature (LCST) such that the polymer precipitated from solution as the temperature was increased. This capability was exploited to control adsorption/desorption on a cellulose acetate membrane. A temperature decrease caused the layer to expand into a rough hydrophilic state while a temperature increase caused a collapse into a smooth hydrophobic state. By cycling the temperature of the modified membrane above and below the LCST, a dynamic surface was created with the potential to reduced fouling.I n this study, N-isopropylacrylamide (NIPAAM) was used as the temperature-responsive polymer; it has an LCST of 32. °C, and was grafted to a cellulose acetate ultrafiltration membrane surface using cerium ammonium nitrate as an initiator. While surface activation was observed at the nano-scale level, no improvements in fouling control were observed during operation.

Original language	English
Pages (from-to)	272-279
Number of pages	8
Journal	Journal of Membrane Science
Volume	383
Issue number	1-2
DOIs	https://doi.org/10.1016/j.memsci.2011.08.066
State	Published - Nov 1 2011

Bibliographical note

Funding Information:
The sources of funding were NSF CBET 0610624 and NSF GK-12 Graduate Teaching Fellows in STEM High School Education: An Environmental Science Learning Community at the Land-Lake Ecosystem Interface, DGE-0742395. The authors would also like to acknowledge the contributions of Drs. Glenn Lipscomb (for initial development), Maria Coleman and Cyndee Gruden. Special thanks also go to Martin Geithmann.

Funding

The sources of funding were NSF CBET 0610624 and NSF GK-12 Graduate Teaching Fellows in STEM High School Education: An Environmental Science Learning Community at the Land-Lake Ecosystem Interface, DGE-0742395. The authors would also like to acknowledge the contributions of Drs. Glenn Lipscomb (for initial development), Maria Coleman and Cyndee Gruden. Special thanks also go to Martin Geithmann.

Funders	Funder number
An Environmental Science Learning Community at the Land-Lake Ecosystem Interface	DGE-0742395
NSF CBET 0610624	CBET 0610624
College of Science, Technology, Engineering, and Mathematics, Youngstown State University

Keywords

Cellulose acetate
N-isopropylacrylamide
Ultrafiltration

ASJC Scopus subject areas

Biochemistry
General Materials Science
Physical and Theoretical Chemistry
Filtration and Separation

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10.1016/j.memsci.2011.08.066

Cite this

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title = "N-isopropylacrylamide (NIPAAM) modified cellulose acetate ultrafiltration membranes",

abstract = "A potentially low fouling membrane was developed by attaching a stimuli-responsive polymer layer on the surface, which offered the potential to collapse or expand the polymer layer with change in temperature. The phase change arose from the existence of a lower critical solution temperature (LCST) such that the polymer precipitated from solution as the temperature was increased. This capability was exploited to control adsorption/desorption on a cellulose acetate membrane. A temperature decrease caused the layer to expand into a rough hydrophilic state while a temperature increase caused a collapse into a smooth hydrophobic state. By cycling the temperature of the modified membrane above and below the LCST, a dynamic surface was created with the potential to reduced fouling.I n this study, N-isopropylacrylamide (NIPAAM) was used as the temperature-responsive polymer; it has an LCST of 32. °C, and was grafted to a cellulose acetate ultrafiltration membrane surface using cerium ammonium nitrate as an initiator. While surface activation was observed at the nano-scale level, no improvements in fouling control were observed during operation.",

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author = "Colleen Gorey and Escobar, \{Isabel C.\}",

note = "Funding Information: The sources of funding were NSF CBET 0610624 and NSF GK-12 Graduate Teaching Fellows in STEM High School Education: An Environmental Science Learning Community at the Land-Lake Ecosystem Interface, DGE-0742395. The authors would also like to acknowledge the contributions of Drs. Glenn Lipscomb (for initial development), Maria Coleman and Cyndee Gruden. Special thanks also go to Martin Geithmann. ",

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AU - Escobar, Isabel C.

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PY - 2011/11/1

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N2 - A potentially low fouling membrane was developed by attaching a stimuli-responsive polymer layer on the surface, which offered the potential to collapse or expand the polymer layer with change in temperature. The phase change arose from the existence of a lower critical solution temperature (LCST) such that the polymer precipitated from solution as the temperature was increased. This capability was exploited to control adsorption/desorption on a cellulose acetate membrane. A temperature decrease caused the layer to expand into a rough hydrophilic state while a temperature increase caused a collapse into a smooth hydrophobic state. By cycling the temperature of the modified membrane above and below the LCST, a dynamic surface was created with the potential to reduced fouling.I n this study, N-isopropylacrylamide (NIPAAM) was used as the temperature-responsive polymer; it has an LCST of 32. °C, and was grafted to a cellulose acetate ultrafiltration membrane surface using cerium ammonium nitrate as an initiator. While surface activation was observed at the nano-scale level, no improvements in fouling control were observed during operation.

AB - A potentially low fouling membrane was developed by attaching a stimuli-responsive polymer layer on the surface, which offered the potential to collapse or expand the polymer layer with change in temperature. The phase change arose from the existence of a lower critical solution temperature (LCST) such that the polymer precipitated from solution as the temperature was increased. This capability was exploited to control adsorption/desorption on a cellulose acetate membrane. A temperature decrease caused the layer to expand into a rough hydrophilic state while a temperature increase caused a collapse into a smooth hydrophobic state. By cycling the temperature of the modified membrane above and below the LCST, a dynamic surface was created with the potential to reduced fouling.I n this study, N-isopropylacrylamide (NIPAAM) was used as the temperature-responsive polymer; it has an LCST of 32. °C, and was grafted to a cellulose acetate ultrafiltration membrane surface using cerium ammonium nitrate as an initiator. While surface activation was observed at the nano-scale level, no improvements in fouling control were observed during operation.

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KW - N-isopropylacrylamide

KW - Ultrafiltration

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N-isopropylacrylamide (NIPAAM) modified cellulose acetate ultrafiltration membranes

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

Access to Document

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