Hydration properties of regioselectively etherified celluloses monitored by 2H and 13C solid-state MAS NMR spectroscopy

► Hydration properties of backbone and side chains in 2,3-O-HPC and 2,3-O-HEC. ► Indication of a two step hydration process. ► C4 chemical shift is inversely correlated with the torsion angle Ψ.