Modeling the effects of temperature and pH on swelling of stimuli-responsive gels

A. D. Drozdov; C. G. Sanporean; J. De C. Christiansen

doi:10.1016/j.eurpolymj.2015.10.025

Modeling the effects of temperature and pH on swelling of stimuli-responsive gels

A. D. Drozdov, C. G. Sanporean, J. De C. Christiansen

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

29 Scopus citations

Abstract

A model is developed for the mechanical behavior of and water uptake by thermo- and pH-sensitive gels. Constitutive equations are derived by means of the free energy imbalance inequality for an arbitrary three-dimensional deformation accompanied by swelling. Adjustable parameters are found by fitting experimental data on N-isopropylacrylamide-acrylic acid, N-isopropylacrylamide-itaconic acid, N-isopropylacrylamide-sodium acrylate and N-isopropylmethacrylamide-sodium methacrylate copolymer gels under unconstrained swelling. Quantitative agreement is demonstrated between the observations and results of simulation. The effects of temperature, pH, and molar fraction of anionic monomers on degree of swelling under constrained water uptake are studied numerically.

Original language	English
Pages (from-to)	278-296
Number of pages	19
Journal	European Polymer Journal
Volume	73
DOIs	https://doi.org/10.1016/j.eurpolymj.2015.10.025
State	Published - 1 Dec 2015
Externally published	Yes

Keywords

Equilibrium swelling
Modeling
Phase transition
Thermo-responsive gel
pH-sensitive gel

ASJC Scopus subject areas

General Physics and Astronomy
Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1016/j.eurpolymj.2015.10.025

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abstract = "A model is developed for the mechanical behavior of and water uptake by thermo- and pH-sensitive gels. Constitutive equations are derived by means of the free energy imbalance inequality for an arbitrary three-dimensional deformation accompanied by swelling. Adjustable parameters are found by fitting experimental data on N-isopropylacrylamide-acrylic acid, N-isopropylacrylamide-itaconic acid, N-isopropylacrylamide-sodium acrylate and N-isopropylmethacrylamide-sodium methacrylate copolymer gels under unconstrained swelling. Quantitative agreement is demonstrated between the observations and results of simulation. The effects of temperature, pH, and molar fraction of anionic monomers on degree of swelling under constrained water uptake are studied numerically.",

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AU - Drozdov, A. D.

AU - Sanporean, C. G.

AU - Christiansen, J. De C.

PY - 2015/12/1

Y1 - 2015/12/1

N2 - A model is developed for the mechanical behavior of and water uptake by thermo- and pH-sensitive gels. Constitutive equations are derived by means of the free energy imbalance inequality for an arbitrary three-dimensional deformation accompanied by swelling. Adjustable parameters are found by fitting experimental data on N-isopropylacrylamide-acrylic acid, N-isopropylacrylamide-itaconic acid, N-isopropylacrylamide-sodium acrylate and N-isopropylmethacrylamide-sodium methacrylate copolymer gels under unconstrained swelling. Quantitative agreement is demonstrated between the observations and results of simulation. The effects of temperature, pH, and molar fraction of anionic monomers on degree of swelling under constrained water uptake are studied numerically.

AB - A model is developed for the mechanical behavior of and water uptake by thermo- and pH-sensitive gels. Constitutive equations are derived by means of the free energy imbalance inequality for an arbitrary three-dimensional deformation accompanied by swelling. Adjustable parameters are found by fitting experimental data on N-isopropylacrylamide-acrylic acid, N-isopropylacrylamide-itaconic acid, N-isopropylacrylamide-sodium acrylate and N-isopropylmethacrylamide-sodium methacrylate copolymer gels under unconstrained swelling. Quantitative agreement is demonstrated between the observations and results of simulation. The effects of temperature, pH, and molar fraction of anionic monomers on degree of swelling under constrained water uptake are studied numerically.

KW - Equilibrium swelling

KW - Modeling

KW - Phase transition

KW - Thermo-responsive gel

KW - pH-sensitive gel

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JO - European Polymer Journal

JF - European Polymer Journal

ER -

Modeling the effects of temperature and pH on swelling of stimuli-responsive gels

Abstract

Keywords

ASJC Scopus subject areas

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