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Biological functionalisation of nanoporous polymer membranes.

Abstract : Poly (vinylidene fluoride) (PVDF-beta) nanoporous membranes Were Made by Chemical Revealing tracks of swift heavy ion induced from irradiation. Pore opening and Varied radiican Be In A Manner controllable with the etching time. Nanopore size in nanometer scale (from 12 nm to 50 nm) appears to be linearly dependent to the etching time. Then It Was Necessary to the characterization tools adapted to thesis membranes. Consequently, we resorted to the use of structural analysis methods (Scanning Electron Microscopy, Small Angle Neutron Scattering) Developed and evaluation methods of the membrane transport properties like ionic gas permeation and di? Usion. Obtenues results conrm the pore opening (break through) and hydrophobicity of the material, Which We Have modi? Ed with hydrophilic molecules. In this precise case, grafting of the acrylic acid Was Initiated by Still Remains the radicals after track-etching (Called radio grafting). This key result by obtenues Was A Study of Electron Paramagnetic Resonance. The labeling of chemical Functionalities Introduced with fluorescent probes Was a very effective mean to visualize very few "Amount of molecules by confocal microscopy. The radiografting autrement specically localized inside etched tracks. The protocol others to create The Possibility Functionality has double, the one localized inside the nanopores and the Other is the surface of membranes. The modication of radiation grafting parameters (the acrylic acid concentration, solvent nature, use of transfer agent) and the chemical properties of the nanopore walls Have a direct impact on the transportation Pure compression. Key Words: beta-PVDF, track-etching, nanopores, radicals, radiografting, selective functionalisation, Small Angle Neutron Scattering, Confocal Laser Scanning Microscopy.
Mots-clés : Membranes polymères
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Submitted on : Thursday, July 22, 2010 - 10:40:15 AM
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Olivia Cuscito. Biological functionalisation of nanoporous polymer membranes.. Physics [physics]. Ecole Polytechnique X, 2008. English. ⟨pastel-00004114⟩

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