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Genre/Form: | Thèses et écrits académiques |
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Material Type: | Document, Thesis/dissertation, Internet resource |
Document Type: | Internet Resource, Computer File |
All Authors / Contributors: |
Jimmy Faivre; Laurent David; Thierry Delair; Xavier Banquy; Anne Jonquières; Anne Rubin; Eric Allémann; Antonella Badia; Daria Camilla Boffito; François Lux; Université de Lyon (2015-....).; Université de Montréal.; Ecole Doctorale Matériaux de Lyon (Villeurbanne).; Université Claude Bernard (Lyon).; IMP - Ingénierie des Matériaux Polymères UMR 5223 (Rhône-Alpes). |
OCLC Number: | 1101085381 |
Notes: | Thèse soutenue en co-tutelle. Titre provenant de l'écran-titre. |
Description: | 1 online resource |
Responsibility: | Jimmy Faivre ; sous la direction de Laurent David et de Thierry Delair et de Xavier Banquy. |
Abstract:
Bioinspiration consists in the design of materials inspired by biological systems which have developed ingenious solutions to suit their environment. This project deals with bioinspiration for joint lubrication and in particular for the development of treatments for patients suffering from osteoarthritis (OA). To do so, we took our inspiration from joints which are amongst the most efficient aqueous tribological systems. Their unique properties arise from the complex synergistic interactions between cartilage structure and the lubricant macromolecules of the synovial fluid (SF). However, during OA, inflammatory mechanisms as long as mechanical erosion result in the degeneration of cartilage and lubricant macromolecules (aggrecan and lubricin). Polymeric mimes of the SF have been synthesized based on the bottle-brush (BB) architecture of LUB and AGG which is responsible for the joint lubrication. Tribological tests (SFA, tribometer) showed that BB polymers provided mica surfaces with a low friction and a wear protection up to several megapascals, typically in the range of natural joints. This wear protection was essentially due to the incorporation of anchoring groups specific to mica tribopairs on the BB polymers and the intermolecular bridging and entanglements emerging between BB polymers and high molecular weight HA, another main SF component. Cartilage mimes composed of multilayered chitosan hydrogels were designed to mimic the basic features of cartilage. Along with our BB polymers, the hydrogels, which are poroelastic and fragile materials, provided a low friction and a great decrease of wear.
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