The effects of high alkali impregnation and oxygen delignification of softwood kraft pulps on the yield and mechanical properties
Source abstract
Abstract
Abstract This study investigated whether the yield improvement after high alkali impregnation (HAI) is maintained after oxygen delignification and whether the potential of oxygen delignification to increase the mechanical properties is affected by high alkali impregnation. The yield improvement achieved by high alkali impregnation (1 %) was preserved after oxygen delignification, particularly of glucomannan. The total fiber charge and swelling increased after oxygen delignification regardless of the type of impregnation in the cooking step. The tensile index improvement obtained by oxygen delignification was retained if this was preceded by high alkali impregnation. The stiffness index was higher and elongation slightly lower after HAI impregnation than after a standard (REF) impregnation. Fibers obtained through high alkali impregnation seem to be slightly less deformed and slightly wider than fibers obtained after a standard impregnation.
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Research context
OpenAlex topics: Lignin and Wood Chemistry · Advanced Cellulose Research Studies · Wood Treatment and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
388792 RISE Research Institutes of Sweden , Bioeconomy and Health, Pulp, Paper and Packaging , Drottning Kristinas väg 61 , Stockholm , Sweden
KTH Royal Institute of Technology , Department of Engineering Mechanics, Solid Mechanics , Stockholm , Sweden
KTH Royal Institute of Technology , Department of Fiber and Polymer Technology , Stockholm , Sweden
Funding
Knut och Alice Wallenbergs Stiftelse · Stora Enso
References (31)
Show source-provided references
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