Determination of oxygen permeability in acrylic-based hydrogels by proton NMR spectroscopy and imaging Articles uri icon

authors

  • COMPAÑ, VICENTE
  • MOLLÁ ROMANO, SERGIO
  • VALLEJOS, SAUL
  • GARCÍA, FÉLIX
  • GARCIA, JOSE MIGUEL
  • GUZMAN, JULIO
  • GARRIDO, LEONCIO

publication date

  • April 2014

start page

  • 624

end page

  • 637

volume

  • 215

International Standard Serial Number (ISSN)

  • 1022-1352

Electronic International Standard Serial Number (EISSN)

  • 1521-3935

abstract

  • 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.

keywords

  • acrylic hydrogels; oxygen permeability; paramagnetism; proton nmr imaging; proton nmr spectroscopy