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dc.contributor.authorFaivre, Jimmy
dc.contributor.authorShrestha, Buddha R.
dc.contributor.authorXie, Guojun
dc.contributor.authorDelair, Thierry
dc.contributor.authorDavid, Laurent
dc.contributor.authorMatyjaszewski, Krzysztof
dc.contributor.authorBanquy, Xavier
dc.date.accessioned2018-04-18T18:56:22Z
dc.date.availableMONTHS_WITHHELD:12fr
dc.date.available2018-04-18T18:56:22Z
dc.date.issued2017-09-29
dc.identifier.citationFaivre, J., Shrestha, B. R., Xie, G., Delair, T., David, L., Matyjaszewski, K., & Banquy, X. (2017). Unraveling the Correlations between Conformation, Lubrication, and Chemical Stability of Bottlebrush Polymers at Interfaces. Biomacromolecules, 18(12), 4002-4010.fr
dc.identifier.urihttp://hdl.handle.net/1866/19935
dc.publisherAmerican Chemical Societyfr
dc.subjectBottlebrush polymerfr
dc.subjectStabilityfr
dc.subjectWear protectionfr
dc.subjectPolymer conformationfr
dc.titleUnraveling the correlations between conformation, lubrication, and chemical stability of bottlebrush polymers at interfacesfr
dc.typeArticlefr
dc.contributor.affiliationUniversité de Montréal. Faculté de pharmaciefr
UdeM.statutÉtudiant(e) aux cycles supérieurs / Graduate Studentfr
dc.identifier.doi10.1021/acs.biomac.7b01063
dcterms.abstractIn the present study, we monitored the conformation and chemical stability of a hydrophilic bottlebrush (BB) polymer in pure water and buffered saline solutions. We correlated these parameters to lubricating and wear protecting properties. Using the Surface Forces Apparatus (SFA), we show that the BB polymer partially adsorbs on mica surfaces and extends half its contour length toward the aqueous media. This conformation gives rise to a strong repulsive interaction force when surfaces bearing BB polymer chains are pressed against each other. Analysis of these repulsive forces demonstrated that the adsorbed polymer chains could be described as end-attached elastic rods. After 2 months of aging at temperatures ranging from 4 to 37 °C, partial scission of the BB polymer's lateral chains was observed by Gel Permeation Chromatography with a half-life time of the polymer of at least two years. The thickness of the BB polymer layer assessed by SFA appeared to quickly decrease with aging time and temperature which was mainly caused by the adsorption to the substrate of the released lateral chains. The gradual loss of the BB polymer lateral chains did not impact significantly the tribological properties of the BB polymer solution nor its wear protection capacity. The friction coefficient between mica surfaces immersed in the BB polymer solution was  = 0.031 ± 0.002, and was independent of the aging conditions and remained constant up to an applied pressure P = 15 atm. Altogether, this study demonstrates that besides the gradual loss of lateral chains, the BB polymer is still able to perform adequately as a lubricant and wear protecting agent over a time period suitable for in vivo administration.fr
dcterms.bibliographicCitationBiomacromolecules ; vol. 18, no 12, p.4002–4010
dcterms.isPartOfurn:ISSN:1525-7797
dcterms.isPartOfurn:ISSN:1526-4602
dcterms.languageengfr
UdeM.VersionRioxxVersion acceptée / Accepted Manuscriptfr


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