Self‐diffusion of small molecules in cellulose gels using FT‐pulsed field gradient NMR

Transport in cellulose gels has been studied with ethylene glycol and crown ether (15‐5) as “probes” using an NMR spin–echo technique. The cellulose content was varied in range 20–55% (w/w). The retardation of diffusion was found to be adequately described by simple first‐order expressions in concentration of cellulose.