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Determination of Oxygen Permeability in Acrylic‐Based Hydrogels by Proton NMR Spectroscopy and Imaging
Author(s) -
Compañ Vicente,
Mollá Sergio,
Vallejos Saúl,
García Félix,
García José Miguel,
Guzmán Julio,
Garrido Leoncio
Publication year - 2014
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201300730
Subject(s) - methacrylamide , oxygen permeability , chemistry , self healing hydrogels , oxygen , polymerization , proton nmr , polymer , polymer chemistry , nuclear magnetic resonance spectroscopy , analytical chemistry (journal) , monomer , organic chemistry , acrylamide
Polymer network membranes with a high capacity for water absorption are obtained by radical polymerization of N ‐[2‐(2‐hydroxyethoxy)ethyl]methacrylamide (HEEMAM). The permeability, solubility, and diffusion coefficients of oxygen in hydrogels are determined using nuclear magnetic resonance (NMR) methods based on the paramagnetic effect of dissolved oxygen gas on the proton spin‐lattice relaxation times of water, and the results are compared with those obtained with electrochemical procedures. The results of NMR measurements of oxygen transport coefficients in distilled water show excellent agreement with corresponding literature values. The results of the potentiostatic and NMR oxygen transport measurements in hydrogels are in reasonable agreement and support the viability of the NMR method.