Tailorable non-linear viscoelastic behavior of hydrogels

IF 2.1 4区材料科学 Q2 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Mechanics of Time-Dependent Materials Pub Date : 2023-10-04 DOI:10.1007/s11043-023-09640-w

Nada Qari, Zhaoqiang Song, Hamed Hosseini-Toudeshki, Chenghai Li, Shengqiang Cai

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Abstract

In this work, we investigate the viscoelastic properties of hydrogels through stress relaxation experiments to better understand the force-dependent dynamics of these materials with the aspiration of expanding their application envelope within the biomedical field and beyond. We experimentally studied the viscoelastic behavior of 4 different types of hydrogels: covalently crosslinked polyacrylamide (PAAm), covalently crosslinked PAAm network immersed in a viscous alginate solution, ionically crosslinked alginate along with crosslinked PAAm-alginate double network. Through our investigations, we demonstrate that we can tailor the viscoelasticity of a covalently bonded PAAm network by tuning the viscosity of the solution in the gel. Moreover, based on the stress relaxation test of ionically crosslinked alginate gel and the double network gel, we have revealed the quantitative correlation between the ionic bond dissociation and force-dependent viscoelastic behavior of gels containing ionic crosslinks.

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可定制的水凝胶非线性粘弹性行为

在这项工作中，我们通过应力松弛实验研究了水凝胶的粘弹性能，以便更好地了解这些材料受力影响的动力学特性，从而扩大它们在生物医学领域及其他领域的应用范围。我们通过实验研究了 4 种不同类型水凝胶的粘弹性行为：共价交联聚丙烯酰胺（PAAm）、浸入粘性海藻酸溶液中的共价交联 PAAm 网络、离子交联海藻酸以及交联 PAAm-海藻酸双层网络。通过研究，我们证明可以通过调节凝胶中溶液的粘度来定制共价键合 PAAm 网络的粘弹性。此外，基于离子交联海藻酸凝胶和双网络凝胶的应力松弛测试，我们揭示了含有离子交联的凝胶的离子键解离与力相关粘弹性行为之间的定量相关性。

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来源期刊

Mechanics of Time-Dependent Materials 工程技术-材料科学：表征与测试

CiteScore

4.90

自引率

8.00%

发文量

审稿时长

>12 weeks

期刊介绍： Mechanics of Time-Dependent Materials accepts contributions dealing with the time-dependent mechanical properties of solid polymers, metals, ceramics, concrete, wood, or their composites. It is recognized that certain materials can be in the melt state as function of temperature and/or pressure. Contributions concerned with fundamental issues relating to processing and melt-to-solid transition behaviour are welcome, as are contributions addressing time-dependent failure and fracture phenomena. Manuscripts addressing environmental issues will be considered if they relate to time-dependent mechanical properties. The journal promotes the transfer of knowledge between various disciplines that deal with the properties of time-dependent solid materials but approach these from different angles. Among these disciplines are: Mechanical Engineering, Aerospace Engineering, Chemical Engineering, Rheology, Materials Science, Polymer Physics, Design, and others.