Modeling and simulation of pH-sensitive hydrogels

Wallmersperger, Thomas; Keller, Karsten; Kröplin, Bernd; Guenther, Margarita; Gerlach, Gerald

doi:10.1007/s00396-011-2404-1

Cited by 43 publications

(24 citation statements)

References 32 publications

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“…This effect explains the experimentally observed asymmetric bending of a hydrogel in an electric field. In a further concurrent article [24] they also take pH into account. In this way gels with pH-dependent dissociation can be modeled in various environments.…”

Section: Phenomenological Approachesmentioning

confidence: 99%

Molecular Simulations of Hydrogels

Košovan

Richter

Holm

2013

Intelligent Hydrogels

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Section: Phenomenological Approachesmentioning

confidence: 99%

Molecular Simulations of Hydrogels

Košovan

Richter

Holm

2013

Intelligent Hydrogels

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“…Chemically, cf. Wallmersperger et al [8], electrically, mechanically, and thermally, cf. Keller et al [7], stimulated hydrogels were simulated within the framework of the FE method in 1D or 2D utilizing user elements in Abaqus/CAE.…”

Section: Modelingmentioning

confidence: 99%

Behaviour of Anionic and Cationic Hydrogels

Keller

Wallmersperger

Ricken

2018

Proc Appl Math and Mech

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Ionic polyelectrolytic gels in an aqueous solution, i.e. hydrogels -also known as smart materials -react to different kinds of environmental changes, e.g. chemical, electrical, mechanical, and thermal stimulation. As a reaction, they show enormous swelling capabilities resulting from the delivery or uptake of ions and solvent. These properties make them attractive for chemo-electro-mechanical energy converters and for the application as actuators or sensors. The applied multi-field formulation consists of the chemical, electrical, and mechanical field and is capable of giving local concentrations, electric potential distributions and displacements. In this excerpt the reaction of a modelled hydrogel finger gripper under electrical stimulation is shown. The swelling ratio is assumed to be in the regime of small volume changes and corresponding displacements.

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“…Please refer to [11] for more detailed information. The stimulus is applied to an almost completely dissociated hydrogel and a partially dissociated hydrogel, respectively.…”

Section: Chemical Stimulationmentioning

confidence: 99%

“…the swelling of the partially dissociated hydrogel is equal to or lower than the swelling of the nearly complete dissociated hydrogel. Please refer to [11] for more detailed information.…”

Section: Chemical Stimulationmentioning

confidence: 99%

An Overview of Simulated Hydrogel Behaviour under Various Kinds of Stimulation

Keller

Wallmersperger

Ricken

2019

Proc Appl Math and Mech

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Polyelectrolytic gels placed in aqueous solution show effects under various kinds of stimulation. The stimuli could be e.g. of chemical, electrical, mechanical or thermal nature. The hydrogels react via uptake or delivery of mobile ions and solvent, and they show enormous swelling capabilities. This multifunctional behaviour is potentially attractive for chemo-electromechanical energy converters or for the use as actuators or sensors. In the present research, anionic and cationic hydrogels are investigated, which means that the polymer network contains anionic or cationic bound charged groups. The chemical stimulation is applied by a change of boundary conditions in the solution bath for the salt concentrations. The electrical stimulus is realized by incorporating electrodes between which an electric potential difference is applied. The mechanical stimulus is realized by prescribed displacements at a boundary of the hydrogel itself. The thermal stimulus is applied as transient temperature change over the whole domain, incorporating temperature-dependent material parameters and osmotic pressure differences. The reactions of the hydrogel differ depending on the sensitivity of the gel to the applied stimulus. The incorporated chemo-electro-mechanical model enhanced with thermal dependencies is capable of giving local concentrations, electric potential and mechanical displacements.

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Modeling and simulation of pH-sensitive hydrogels

Cited by 43 publications

References 32 publications

Molecular Simulations of Hydrogels

Molecular Simulations of Hydrogels

Behaviour of Anionic and Cationic Hydrogels

An Overview of Simulated Hydrogel Behaviour under Various Kinds of Stimulation

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