Relationship between long-range diffusion and diffusion in the ZIF-8 and polymer phases of a mixed-matrix membrane by high field NMR diffusometry
作者： Robert Mueller , Suihua Zhang , Chen Zhang , Ryan Lively , Sergey Vasenkov
DOI: 10.1016/J.MEMSCI.2014.12.015
关键词:
摘要: Abstract Pulsed field gradient (PFG) NMR is applied to resolve different modes of ethene self-diffusion inside a mixed-matrix membrane (MMM) consisting ZIF-8 particles embedded in 6FDA–DAM polymer: (i) diffusion the particles, (ii) surrounding polymer matrix, and (iii) under conditions an exchange between over length scales smaller than comparable with thickness. This resolution achieved using C-13 PFG studies at high magnetic 17.6 T large gradients up 30 T/m. was also measure constituent components used MMM formation: bed pure polymer. It shown that comparison all measured data elucidates details sorbate mediated dynamics MMM. An model connect long-range diffusivity for displacements larger size diffusivities
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