In:
Holzforschung, Walter de Gruyter GmbH, Vol. 72, No. 10 ( 2018-10-25), p. 829-837
Abstract:
The supramolecular structure of eucalyptus pulp cellulose was studied by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and water retention value (WRV) after subjecting the pulp to pressures of 0.1, 0.2, 0.3, 0.4 and 0.5 MPa. It was interpreted from the FTIR spectra of the sheets after pressing that the amount of intermolecular hydrogen bonds (HB inter ) first increased and then decreased as a function of increasing pressure, while the number of the intramolecular hydrogen bonding (HB intra ) exhibited an opposite trend. In the pressed fibers, the number of HB intra O(6)H· · ·O(3′) increased by 16% compared to the un-pressed fibers, while the number of HB inter O(2)H· · ·O(6) and O(3)H· · ·O(5) decreased by 23% at 0.3 MPa. XRD analysis showed that the crystallite size corresponding to the diffraction peaks for (002) lattice planes and the crystallinity of eucalyptus fibers were the lowest at a pressure of 0.3 MPa. Pressing produced an irreversible reduction of fiber pore volume, which was manifested by reduced WRV data.
Type of Medium:
Online Resource
ISSN:
1437-434X
,
0018-3830
DOI:
10.1515/hf-2017-0214
Language:
Unknown
Publisher:
Walter de Gruyter GmbH
Publication Date:
2018
detail.hit.zdb_id:
1466072-6
SSG:
23
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