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Amorphous cellulose – Structure and characterization

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Ciolacu, Diana; Ciolacu, Florin; Popa, Valentin I.

Editorial: CELLULOSE CHEMISTRY AND TECHNOLOGY, 45 (1-2), p.13-21, 2011.

Rezumat:

Amorphous cellulose was obtained from different types of celluloses (microcrystalline cellulose, dissolving
pulp and cotton cellulose), by regeneration with ethanol from their solutions in an SO2-diethylaminedimethylsulfoxide
(SO2-DEA-DMSO) solvent system. Different techniques, X-ray diffraction (XRD), FTIR
spectroscopy and differential scanning calorimetry (DSC) were used to estimate the crystallinity degree. The
values obtained for amorphous celluloses were compared with those of the initial samples and correlated
with their supramolecular structures. Viscosity measurements have shown that little or no depolymerization
occurs during dissolution.

Cuvinte cheie: cellulose I, dissolution, regeneration, amorphous cellulose, XRD, FTIR, DSC