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dc.contributor.authorFaivre, Jimmy
dc.contributor.authorSudre, Guillaume
dc.contributor.authorMontembault, Alexandra
dc.contributor.authorBenayoun, Stéphane
dc.contributor.authorBanquy, Xavier
dc.contributor.authorDelair, Thierry
dc.contributor.authorDavid, Laurent
dc.date.accessioned2018-04-18T14:02:55Z
dc.date.availableMONTHS_WITHHELD:12fr
dc.date.available2018-04-18T14:02:55Z
dc.date.issued2018-02-16
dc.identifier.urihttp://hdl.handle.net/1866/19933
dc.publisherRoyal Society of Chemistryfr
dc.titleBioinspired microstructures of chitosan hydrogel provide enhanced wear protectionfr
dc.typeArticlefr
dc.contributor.affiliationUniversité de Montréal. Faculté de pharmaciefr
UdeM.statutÉtudiant(e) aux cycles supérieurs / Graduate Studentfr
dc.identifier.doi10.1039/C8SM00215K.
dcterms.abstractWe 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.languageengfr
UdeM.VersionRioxxVersion acceptée / Accepted Manuscriptfr
oaire.citationTitleSoft matter
oaire.citationVolume14
oaire.citationIssue11
oaire.citationStartPage2068
oaire.citationEndPage2076


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