Probe diffusion in phase-separated bicontinuous biopolymer gels.

摘要: Probe diffusion was determined in phase separated bicontinuous gels prepared by acid-induced gelation of the whey protein isolate-gellan gum system. The topological characterization phase-separated gel systems is achieved confocal microscopy and measurements are performed using pulsed field gradient (PFG) NMR fluorescence recovery after photo-bleaching (FRAP). These two techniques gave complementary information about mass transport at different time- length scales, PFG provided global rates systems, while FRAP enabled phases gels. results revealed that with largest characteristic wavelength had fastest coefficient, smaller microstructures a slower probe rate. By data obtained structural from microscopy, modelling through lattice-Boltzmann framework carried out to simulate verify validity experimental measurements. With this approach it found discrepancies between can be rationalized terms distribution combination allowed determination biopolymer clearer picture complex We also illustrate difficulties arise if precautions not taken understand system-probe interactions.