Interactions among Components in the Primary Cell Wall of Norway Spruce (Picea Abies (L.) Karst.): Effect of a Low Sulphonation Pretreatment
2008 (English)In: Journal of Pulp and Paper Science (JPPS), ISSN 0826-6220, Vol. 34, no 2, 107-112 p.Article in journal (Refereed) Published
Dynamic Fourier Transform Infra-Red (FT-IR) spectroscopy was used to examine the effect of a low sulphonation treatment on the ultrastructure of the primary cell wall of spruce wood. Sheets made from enriched primary cell wall material coming from a low sulphonated thermomechanical pulp were used for studying the viscoelastic response of the polymers using dynamic FT-IR spectroscopy. The overall ultrastructure of the primary cell wall remained largely unaltered, due to the exceptionally low degree of sulphonation used. However, an increased softening of the material as well as a weakening of the lignin,pectin, lignin, protein and pectin, protein interactions were observed. The suggestion is that, together with a structural modification of the lignin, it is the increased viscoelasticity of the material, resulting from the breaking down of the interactions among the polymers, that is the cause for the lower energy demand, when refining correspondingly low sulphonated chips.
Place, publisher, year, edition, pages
2008. Vol. 34, no 2, 107-112 p.
Norway spruce, Picea Abies (L.) Karst., Dynamic FT-IR spectroscopy, Primary cell wall, Interaction, Polymers, Sulphonation, Sodium sulphite, Pretreatment, Chips, Energy consumption
IdentifiersURN: urn:nbn:se:kth:diva-7919ISI: 000261815400005OAI: oai:DiVA.org:kth-7919DiVA: diva2:13092
QC 20101123 Uppdaterad från accepted till published (20101123).2008-01-252008-01-252010-11-23Bibliographically approved