Evaluation of intermolecular interactions of hydrogels: Experimental study and constitutive modeling

Uchida, Makoto; Sato, Hiroto; Kaneko, Yoshihisa; Okumura, Dai; Hossain, Mokarram

doi:10.1016/j.ijsolstr.2025.113428

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Evaluation of intermolecular interactions of hydrogels: Experimental study and constitutive modeling

Makoto Uchida

, Hiroto Sato, Yoshihisa Kaneko, Dai Okumura

, Mokarram Hossain

International Journal of Solids and Structures, Volume: 317, Start page: 113428

Swansea University Author: Mokarram Hossain

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DOI (Published version): 10.1016/j.ijsolstr.2025.113428

Abstract

The mechanical properties of hydrogels are significantly influenced by the solvent content. In particular, inelastic deformation occurs in dried hydrogels. In this study, we quantitatively evaluated the inelastic deformation of a hydrogel introduced by intermolecular interactions under uniaxial tens...

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Published in:	International Journal of Solids and Structures
ISSN:	0020-7683
Published:	Elsevier BV 2025
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa69405

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last_indexed	2025-06-19T10:46:28Z
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spelling	2025-06-18T13:57:17.0926815 v2 69405 2025-05-02 Evaluation of intermolecular interactions of hydrogels: Experimental study and constitutive modeling 140f4aa5c5ec18ec173c8542a7fddafd 0000-0002-4616-1104 Mokarram Hossain Mokarram Hossain true false 2025-05-02 ACEM The mechanical properties of hydrogels are significantly influenced by the solvent content. In particular, inelastic deformation occurs in dried hydrogels. In this study, we quantitatively evaluated the inelastic deformation of a hydrogel introduced by intermolecular interactions under uniaxial tensile loading–unloading tests and established a visco-hyperelastic model describing the experimentally observed inelastic behavior based on the transient network theory. The development of the strain field during the test was measured using digital image correlation (DIC) method, and the relationship between the true stress and the true strain was evaluated using the obtained strain field. A significant difference between the loading and the unloading responses was observed for the dried hydrogel specimens. This result indicates that intermolecular interactions induce irreversible deformation when the intermolecular chain distance is smaller. A non-dimensional parameter corresponding to the intermolecular chain distance was introduced to describe the irreversible response of the hydrogel observed in the experimental study. This parameter is a function of the densities of molecular chains, number of segments per chain, and stretching accompanied by swelling and drying. A visco-hyperelastic model was established by introducing the proposed parameter into the transient network theory. The proposed model qualitatively and quantitatively reproduced the experimentally observed features of the mechanical response of the hydrogel. Journal Article International Journal of Solids and Structures 317 113428 Elsevier BV 0020-7683 Hydrogel; Swelling; Drying; Inelastic; Visco-hyperelastic; Transient network; Intermolecular interaction 1 7 2025 2025-07-01 10.1016/j.ijsolstr.2025.113428 COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University 2025-06-18T13:57:17.0926815 2025-05-02T13:03:37.8163803 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering Makoto Uchida 0000-0002-5445-4580 1 Hiroto Sato 2 Yoshihisa Kaneko 3 Dai Okumura 0000-0002-4020-8258 4 Mokarram Hossain 0000-0002-4616-1104 5 69405__34167__be03f08df8704c499e9abf62f4bf688d.pdf 69405.pdf 2025-05-02T13:07:23.8936187 Output 1227727 application/pdf Accepted Manuscript true Author accepted manuscript document released under the terms of a Creative Commons CC-BY licence using the Swansea University Research Publications Policy (rights retention). true eng https://creativecommons.org/licenses/by/4.0/deed.en
title	Evaluation of intermolecular interactions of hydrogels: Experimental study and constitutive modeling
spellingShingle	Evaluation of intermolecular interactions of hydrogels: Experimental study and constitutive modeling Mokarram Hossain
title_short	Evaluation of intermolecular interactions of hydrogels: Experimental study and constitutive modeling
title_full	Evaluation of intermolecular interactions of hydrogels: Experimental study and constitutive modeling
title_fullStr	Evaluation of intermolecular interactions of hydrogels: Experimental study and constitutive modeling
title_full_unstemmed	Evaluation of intermolecular interactions of hydrogels: Experimental study and constitutive modeling
title_sort	Evaluation of intermolecular interactions of hydrogels: Experimental study and constitutive modeling
author_id_str_mv	140f4aa5c5ec18ec173c8542a7fddafd
author_id_fullname_str_mv	140f4aa5c5ec18ec173c8542a7fddafd_***_Mokarram Hossain
author	Mokarram Hossain
author2	Makoto Uchida Hiroto Sato Yoshihisa Kaneko Dai Okumura Mokarram Hossain
format	Journal article
container_title	International Journal of Solids and Structures
container_volume	317
container_start_page	113428
publishDate	2025
institution	Swansea University
issn	0020-7683
doi_str_mv	10.1016/j.ijsolstr.2025.113428
publisher	Elsevier BV
college_str	Faculty of Science and Engineering
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hierarchy_top_title	Faculty of Science and Engineering
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hierarchy_parent_title	Faculty of Science and Engineering
department_str	School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering
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description	The mechanical properties of hydrogels are significantly influenced by the solvent content. In particular, inelastic deformation occurs in dried hydrogels. In this study, we quantitatively evaluated the inelastic deformation of a hydrogel introduced by intermolecular interactions under uniaxial tensile loading–unloading tests and established a visco-hyperelastic model describing the experimentally observed inelastic behavior based on the transient network theory. The development of the strain field during the test was measured using digital image correlation (DIC) method, and the relationship between the true stress and the true strain was evaluated using the obtained strain field. A significant difference between the loading and the unloading responses was observed for the dried hydrogel specimens. This result indicates that intermolecular interactions induce irreversible deformation when the intermolecular chain distance is smaller. A non-dimensional parameter corresponding to the intermolecular chain distance was introduced to describe the irreversible response of the hydrogel observed in the experimental study. This parameter is a function of the densities of molecular chains, number of segments per chain, and stretching accompanied by swelling and drying. A visco-hyperelastic model was established by introducing the proposed parameter into the transient network theory. The proposed model qualitatively and quantitatively reproduced the experimentally observed features of the mechanical response of the hydrogel.
published_date	2025-07-01T05:58:17Z
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score	11.068938

Evaluation of intermolecular interactions of hydrogels: Experimental study and constitutive modeling

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