Browsing Faculté de pharmacie – Travaux et publications by Author "Faivre, Jimmy"
Now showing items 1-13 of 13
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Bioinspired microstructures of chitosan hydrogel provide enhanced wear protection
(Royal Society of Chemistry, 2018-02-16)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 ... -
Biomimetic bottle-brush polymer coatings for fabrication of ultra-low fouling surfaces
(Wiley, 2018-11-13)The increasing demand for long lasting antifouling surfaces has steered the development of accessible, novel, biocompatible and environmentally-friendly materials. Inspired by lubricin (LUB), a component of mammalian synovial fluid with excellent ... -
Chitosan hydrogel micro-bio-devices with complex capillary patterns via reactive-diffusive self-assembly
(Elsevier, 2019-08-29)We present chitosan hydrogel microfluidic devices with self-assembled complex microcapillary patterns, conveniently formed by a diffusion-reaction process. These patterns in chitosan hydrogels are formed by a single-step procedure involving diffusion ... -
Effect of polymer architecture on Curcumin 1 encapsulation and release from PEGylated polymer nanoparticles: toward a drug delivery nano-platform to the CNS
(2015-10-01)We developed a nanoparticles (NPs) library from poly(ethylene glycol)–poly lactic acid comb-like polymers with variable amount of PEG. Curcumin was encapsulated in the NPs with a view to develop a delivery platform to treat diseases involving oxidative ... -
Effect of Polymer Architecture on the Structural and Biophysical Properties of PEG-PLA Nanoparticles
(2015-05-01)Polymers made of poly(ethylene glycol) chains grafted to poly(lactic acid) chains (PEG-g-PLA) were used to produce stealth drug nanocarriers. A library of comb-like PEG-g-PLA polymers with different PEG grafting densities was prepared in order to obtain ... -
Effect of surface chemistry of polymeric nanoparticles on cutaneous penetration of cholecalciferol
(Elsevier, 2018-10-11)We investigated the influence of nanoparticle (NP) surface composition on different aspects of skin delivery of a lipophilic drug: chemical stability, release and skin penetration. Cholecalciferol was chosen as a labile model drug. Poly(lactic acid) ... -
Interaction forces between pegylated star-shaped polymers at mica surfaces
(American Chemical Society, 2017-08-03)We present a study focused on characterizing the interaction forces between mica surfaces across solutions containing star-shaped polymers with cationic ends. Using the Surface Forces Apparatus, we show that the interaction forces in pure water between ... -
Intermolecular interactions between Bottlebrush Polymers boost the protection of surfaces against frictional wear
(ACS Publications, 2018-05-30)Polymers exhibiting the bottlebrush (BB) architecture have excellent lubricating properties. However, to motivate their use in real life systems, they must also protect surfaces against frictional damage. In this article, we synthesized a library of ... -
Lubrication and wear protection of micro-structured hydrogels using bioinspired fluids
(American Chemical Society, 2018-11-21)We report the fabrication and the use of a bioinspired synovial fluid acting as a lubricant fluid and anti-wear agent at soft and porous chitosan hydrogel tribopairs. This synthetic synovial fluid is composed of sodium hyaluronate (HA) and a bottle-brush ... -
Nanoparticle shell structural cues drive in vitro transport properties, tissue distribution and brain accessibility in Zebrafish
(Elsevier, 2021-08-24)Zwitterion polymers with strong antifouling properties have been suggested as the prime alternative to polyethylene glycol (PEG) for drug nanocarriers surface coating. It is believed that PEG coating shortcomings, such as immune responses and incomplete ... -
Subtle and unexpected role of PEG in tuning the penetration mechanisms of PLA-based nano-formulations into intact and impaired skin
(Elsevier, 2019-02-27)We present a systematic study of the role of poly(ethylene glycol) (PEG) content in NPs on drug skin absorption. Cholecalciferol-loaded NPs of 100 nm of diameter were prepared by flash nanoprecipitation from PLA-b-PEG copolymers of various PEG lengths. ... -
Unraveling the correlations between conformation, lubrication, and chemical stability of bottlebrush polymers at interfaces
(American Chemical Society, 2017-09-29)In 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 ... -
Wear protection without surface modification using a synergistic mixture of molecular brushes and linear polymers
(American Chemical Society, 2017-01-10)We describe the design of lubricating and wear protecting fluids based on mixtures of bottlebrushes (BB) and linear polymers solutions. To illustrate this concept we used hyaluronic acid (HA) - a naturally occurring linear polyelectrolyte, and a water ...
