Bioinspired microstructures of chitosan hydrogel provide enhanced wear protection
dc.contributor.author | Faivre, Jimmy | |
dc.contributor.author | Sudre, Guillaume | |
dc.contributor.author | Montembault, Alexandra | |
dc.contributor.author | Benayoun, Stéphane | |
dc.contributor.author | Banquy, Xavier | |
dc.contributor.author | Delair, Thierry | |
dc.contributor.author | David, Laurent | |
dc.date.accessioned | 2018-04-18T14:02:55Z | |
dc.date.available | MONTHS_WITHHELD:12 | fr |
dc.date.available | 2018-04-18T14:02:55Z | |
dc.date.issued | 2018-02-16 | |
dc.identifier.uri | http://hdl.handle.net/1866/19933 | |
dc.publisher | Royal Society of Chemistry | fr |
dc.title | Bioinspired microstructures of chitosan hydrogel provide enhanced wear protection | fr |
dc.type | Article | fr |
dc.contributor.affiliation | Université de Montréal. Faculté de pharmacie | fr |
UdeM.statut | Étudiant(e) aux cycles supérieurs / Graduate Student | fr |
dc.identifier.doi | 10.1039/C8SM00215K. | |
dcterms.abstract | We describe the fabrication of physical chitosan hydrogels exhibiting a layered structure. This bilayered structure, as shown by SEM and confocal microscopy, is composed of a thin dense superficial zone (SZ), covering a deeper zone (DZ) containing microchannels orientated perpendicularly to the SZ. We show that such structure favors diffusion of macromolecules within the hydrogel matrix up to a critical pressure, σc, above which channels were constricted. Moreover, we found that the SZ provided a higher wear resistance than the DZ which was severely damaged at a pressure equal to the elastic modulus of the gel. The coefficient of friction (CoF) of the SZ remained independent of the applied load with μSZ = 0.38 ± 0.02, while CoF measured at DZ exhibited two regimes: an initial CoF close to the value found on the SZ, and a CoF that decreased to μDZ = 0.18 ± 0.01 at pressures higher than the critical pressure σc. Overall, our results show that internal structuring is a promising avenue in controlling and improving the wear resistance of soft materials such as hydrogels. | fr |
dcterms.language | eng | fr |
UdeM.VersionRioxx | Version acceptée / Accepted Manuscript | fr |
oaire.citationTitle | Soft matter | |
oaire.citationVolume | 14 | |
oaire.citationIssue | 11 | |
oaire.citationStartPage | 2068 | |
oaire.citationEndPage | 2076 |
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