Determination of Oxygen Permeability in Acrylic-Based Hydrogels by Proton NMR Spectroscopy and Imaging

作者：Compan Vicente; Molla Sergio; Vallejos Saul; Garcia Felix; Miguel Garcia Jose; Guzman Julio; Garrido Leoncio^*

来源：Macromolecular Chemistry and Physics, 2014, 215(7): 624-637.

DOI：10.1002/macp.201300730

• acrylic hydrogels
• oxygen permeability
• paramagnetism
• proton NMR imaging
• proton NMR spectroscopy

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. %26lt;boxed-text content-type=%26quot;graphic%26quot; position=%26quot;anchor%26quot;%26gt; %26lt;graphic xmlns:xlink=%26quot;http://www.w3.org/1999/xlink%26quot; xlink:href=%26quot;urn:x-wiley:10221352:media:macp201300730:macp201300730-abs-0001%26quot;%26gt;image%26lt;/graphic

• 出版日期2014-4