Temperature dependency of bound water of cellulose studied by a high‐resolution NMR spectrometer

摘要

AbstractThe widths at half‐value of high‐resolution NMR spectra of bound water of cellulose were studied in relation to the temperature change. Two points were made clear: First, the amount of bound water of the cellulose sample can be pointed out with higher accuracy the lower the temperature of the measurement. Second, it is possible to determine in a simple manner the boundary temperatureTcat which water molecules become bound by the cellulose.Tcis characteristic of the cellulose sample of a given water content and corresponds to the glass transition temperature of the water‐containing sample. The measurements appear to be readily applicable to other hydrophilic pol