期刊
MATERIALS SCIENCE AND ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
卷 75, 期 -, 页码 769-776出版社
ELSEVIER
DOI: 10.1016/j.msec.2017.02.045
关键词
Hydrogels; Poly(vinyl alcohol); Mechanical characterization; Hyperelasticity
This paper investigates the influence of three different processing parameters on the global mechanical behavior of PVA (Polyvinyl alcohol)/DMSO (Dimethylsulfoxide) hydrogels: the initial concentration of PVA, the DMSO:H2O ratio and the number of freeze/thaw cycle applied to the material. A specific thermo-regulated testing apparatus for hydrophilic materials is presented, along with the performed cyclic and rupture tests. The observed mechanical responses are explained by an in-depth analysis of the cross-linking phenomenon. Using the Neo-Hookean hyperelastic model, the experimental data is fitted and a link between the density of macro molecular chains in the material and its mechanical behavior is established. Strong differences are observed and discussed. (C) 2017 Elsevier B.V. All rights reserved.
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