Micro/nano-structural evolution in spruce wood during soda pulping

Abdel Hady, Ahmed Wagih Abdallah,1990Chalmers University of Technology,Zagazig University (författare)

Alkaline delignification of wood tissue is the core of the global pulping technology and the most prominent large-scale separation of the main wood components. This work aims at improved understanding of the interplay between the topochemistry of alkaline pulping and the associated morphological changes. Morphology and chemical structure of partially soda-delignified wood chips were studied combining X-ray tomography (XRT), X-ray diffraction analysis and compositional characterization (lignin and carbohydrate content). The XRT studies of wet samples (providing 3D structural information without interfering drying effects), allowed observation of the cell wall separation as an increasing amount of lignin was removed with the increasing pulping time. Comparison between the microstructure of the surface and the central parts of the treated chips showed a more delignified microstructure at the surface, which highlights the dependence of the delignification process on the mass transport (hydroxide ions and lignin fragments) through the wood tissue. The crystallite size of cellulose increased in the <200> crystal planes during the early stage of pulping while there was little effect on the <110> plane.

Hasani, Merima,1978Chalmers University of Technology(Swepub:cth)k99meme (författare)
Hall, Stephen A.Lund University,Lunds universitet,Hållfasthetslära,Institutionen för byggvetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,LINXS - Institute of advanced Neutron and X-ray Science,Kemiska institutionen,Solid Mechanics,Department of Construction Sciences,Departments at LTH,Faculty of Engineering, LTH,Department of Chemistry,Faculty of Engineering, LTH(Swepub:lu)soli-shh (författare)
Theliander, Hans,1956Chalmers University of Technology(Swepub:cth)hanst (författare)
Chalmers University of TechnologyZagazig University (creator_code:org_t)

Av författaren/redakt...: Abdel Hady, Ahme ...; Hasani, Merima, ...; Hall, Stephen A.; Theliander, Hans ...

Om ämnet

LANTBRUKSVETENSKAPER: LANTBRUKSVETENSK ...; och Lantbruksvetensk ...; och Trävetenskap

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Materialteknik; och Pappers massa oc ...

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Materialteknik; och Kompositmaterial ...

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