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Issue 7, 2018
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Hydrogels: experimental characterization and mathematical modelling of their mechanical and diffusive behaviour

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Abstract

Hydrogels are materials widely used in countless applications, particularly in the biomedical, pharmaceutical, and nutraceutical fields, because of their biocompatibility and their mechanical and transport properties. Several approaches are known to evaluate their properties, but only a few approaches are under development to mathematically describe their behaviour, in terms of how the materials answer to mechanical stimuli and how incorporated active substances are released. In this review, the main properties of hydrogels are summarized and the structure–property relationships are investigated (i.e. how the macromolecular structure influences the properties of macroscopic samples made of hydrogels). A selection criterion is proposed based on the comparison of three characteristic times: relaxation time, diffusion time, and process time. Then, the most common experimental methods to investigate the hydrogel properties are summarized, along with the state-of-the-art of mathematical modelling, with reference to the mechanical and transport properties of hydrogels, with particular attention to the viscoelastic and poroelastic behaviours. Last but not least, some case histories which can be classified as viscoelastic, poroelastic, or poroviscoelastic behaviours are presented.

Graphical abstract: Hydrogels: experimental characterization and mathematical modelling of their mechanical and diffusive behaviour

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Publication details

The article was received on 29 Aug 2017 and first published on 05 Mar 2018


Article type: Review Article
DOI: 10.1039/C7CS00638A
Citation: Chem. Soc. Rev., 2018,47, 2357-2373
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    Hydrogels: experimental characterization and mathematical modelling of their mechanical and diffusive behaviour

    D. Caccavo, S. Cascone, G. Lamberti and A. A. Barba, Chem. Soc. Rev., 2018, 47, 2357
    DOI: 10.1039/C7CS00638A

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