Analysis of mercerization process based on the intensity change of deconvoluted resonances of 13C CP/MAS NMR: Cellulose mercerized under cooling and non-cooling conditions

摘要: Abstract The area intensity change of C1, C4, and C6 in spectrum obtained by 13 C CP/MAS NMR the mutual relationship between their changes were examined for cellulose samples treated with various concentrations aqueous NaOH solutions under non-cooling cooling conditions. C1-up C6-down changed cooperatively that C4-down which corresponds to crystallinity samples: “-up” “-down” are up- down- field component a splitting peak spectrum, respectively. starts decrease decreasing after is almost complete. These more clearly observed condition. It can be suggested characteristic relates closely conformation chains induced decrystallization subsequent crystallization II, presumed at microscopic level relate macroscopic morphological such as contraction along length recovery length.