Crosslinker concentration effect on the poroviscoelastic relaxation of polyacrylamide hydrogels using depth-sensing indentation
The effect of crosslinker concentration on the mechanical behaviour of polyacrylamide based hydrogels is established by using depth sensing indentation. In this work, hydrogels are considered as poroviscoelastic solids, being viscoelasticity and poroelasticity taken into account at intermediate leng...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-08-01
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| Series: | Polymer Testing |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142941821002142 |
| _version_ | 1818640382438670336 |
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| author | C. Reinhards – Hervás A. Rico J. Rodríguez |
| author_facet | C. Reinhards – Hervás A. Rico J. Rodríguez |
| author_sort | C. Reinhards – Hervás |
| collection | DOAJ |
| description | The effect of crosslinker concentration on the mechanical behaviour of polyacrylamide based hydrogels is established by using depth sensing indentation. In this work, hydrogels are considered as poroviscoelastic solids, being viscoelasticity and poroelasticity taken into account at intermediate length scales such as those here explored. A constrained fitting method is derived to implement a multiplicative rule that accommodates the contribution of each deformation mechanism on the global material response. The proposed method is robust enough to properly separate poroelastic and viscoelastic contributions from relaxation curves measured at different indentation depths and strain rates. At the length scales here tested viscoelasticity appears as dominant, but the poroelastic contribution becomes increasingly important as the crosslinker concentration is reduced. |
| first_indexed | 2024-12-16T23:10:23Z |
| format | Article |
| id | doaj.art-53bcac9ec9b840f5bca1b04acf3a4664 |
| institution | Directory Open Access Journal |
| issn | 0142-9418 |
| language | English |
| last_indexed | 2024-12-16T23:10:23Z |
| publishDate | 2021-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Polymer Testing |
| spelling | doaj.art-53bcac9ec9b840f5bca1b04acf3a46642022-12-21T22:12:26ZengElsevierPolymer Testing0142-94182021-08-01100107265Crosslinker concentration effect on the poroviscoelastic relaxation of polyacrylamide hydrogels using depth-sensing indentationC. Reinhards – Hervás0A. Rico1J. Rodríguez2Durability and Mechanical Integrity of Structural Materials, Rey Juan Carlos University, Tulipán S/n, 28933, Móstoles, Madrid, SpainDurability and Mechanical Integrity of Structural Materials, Rey Juan Carlos University, Tulipán S/n, 28933, Móstoles, Madrid, SpainCorresponding author.; Durability and Mechanical Integrity of Structural Materials, Rey Juan Carlos University, Tulipán S/n, 28933, Móstoles, Madrid, SpainThe effect of crosslinker concentration on the mechanical behaviour of polyacrylamide based hydrogels is established by using depth sensing indentation. In this work, hydrogels are considered as poroviscoelastic solids, being viscoelasticity and poroelasticity taken into account at intermediate length scales such as those here explored. A constrained fitting method is derived to implement a multiplicative rule that accommodates the contribution of each deformation mechanism on the global material response. The proposed method is robust enough to properly separate poroelastic and viscoelastic contributions from relaxation curves measured at different indentation depths and strain rates. At the length scales here tested viscoelasticity appears as dominant, but the poroelastic contribution becomes increasingly important as the crosslinker concentration is reduced.http://www.sciencedirect.com/science/article/pii/S0142941821002142Polyacrylamide hydrogelsPoroviscoelasticityDepth sensing indentationFitting method |
| spellingShingle | C. Reinhards – Hervás A. Rico J. Rodríguez Crosslinker concentration effect on the poroviscoelastic relaxation of polyacrylamide hydrogels using depth-sensing indentation Polymer Testing Polyacrylamide hydrogels Poroviscoelasticity Depth sensing indentation Fitting method |
| title | Crosslinker concentration effect on the poroviscoelastic relaxation of polyacrylamide hydrogels using depth-sensing indentation |
| title_full | Crosslinker concentration effect on the poroviscoelastic relaxation of polyacrylamide hydrogels using depth-sensing indentation |
| title_fullStr | Crosslinker concentration effect on the poroviscoelastic relaxation of polyacrylamide hydrogels using depth-sensing indentation |
| title_full_unstemmed | Crosslinker concentration effect on the poroviscoelastic relaxation of polyacrylamide hydrogels using depth-sensing indentation |
| title_short | Crosslinker concentration effect on the poroviscoelastic relaxation of polyacrylamide hydrogels using depth-sensing indentation |
| title_sort | crosslinker concentration effect on the poroviscoelastic relaxation of polyacrylamide hydrogels using depth sensing indentation |
| topic | Polyacrylamide hydrogels Poroviscoelasticity Depth sensing indentation Fitting method |
| url | http://www.sciencedirect.com/science/article/pii/S0142941821002142 |
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