NMR-Measurememts to Study Binding States and Mobility of Water in Cellulose Packaging Materials

Abstract

Water plays an important role as transport medium, solvent, and reaction partner for many processes in food packaging interactions. The degree of water availability does not only depend on the water content but also on its mobility and type of sorption binding. Binding states and mobility can easily be determined using different NMR-techniques. The relaxation times T1 and T2 of water were measured for different cellulose materials which can serve as a model for biopolymers at various water contents. Self-diffusion coefficients were determined for different water contents and temperatures using low resolution pulsed NMR-spectroscopy.