Daisuke Ishii - Effect of Solvent Exchange on the Solid Structure and Dissolution Behavior of Cellulose

Version 1

      Publication Details (including relevant citation   information):

    Biomacromolecules20034 (5), pp 1238–1243
    DOI: 10.1021/bm034065g
    Publication Date (Web): June 27, 2003


        Effects of solvent exchange and milling on the solid structure of   cellulose were investigated, using small- and wide-angle X-ray   scattering and solid-state NMR. The solvent exchange facilitated   the dissolution of cellulose in LiCl/DMAc with no change of the   crystalline structure of cellulose. In contrast, the milling   never facilitated the dissolution of cellulose, though the   crystalline structure was almost destroyed. These facts show that   the crystalline structure of cellulose hardly affects the   dissolution in LiCl/DMAc. The fractal dimensions determined by   the small-angle X-ray scattering measurements were increased by   the solvent exchange, suggesting that the aggregation state of   the cellulose microfibril is affected. It was also suggested by   the NMR 1H   spin relaxation time measurements that the solvent exchange   enhances the molecular mobility of cellulose and shortens the   characteristic length along the microfibril, which allows easier   access of the solvent molecule to cellulose.

      Address (URL): http://pubs.acs.org/doi/abs/10.1021/bm034065g