Fiber morphology responsible for restricted solubility of softwood kraft pulp in LiCl/DMAc

Tiina Liitiä, B. O. Hortling, Piia Honkonen, Asko Sneck, Olli Joutsimo, Tarja Tamminen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

3 Citations (Scopus)


Solid-state NMR spectroscopy and FTIR microspectroscopy were used to investigate the contribution of fiber ultrastructure to the limited solubility of softwood kraft pulp in LiCl/DMAc. The insoluble residue was enriched with glucomannan, and the NMR studies suggest that cellulose fibrils are covered with linear glucomannan, which together may form an insoluble complex. Damage to the fiber ultrastructure by mechanical treatment resulted in lower crystallinity and improved solubility. The interaction between cellulose and glucomannan was probably also destroyed in damaged fibers, improving the accessibility by the solvent. The insoluble material was found to contain highly swollen fibers with very low crystallinity, but also some intact fibers with nearly original pulp crystallinity.

Original languageEnglish
Title of host publicationAppita Conference and Exhibition (59th : 2005 : Auckland, N.Z.)
Number of pages5
Publication statusPublished - 1 Dec 2005
MoE publication typeNot Eligible
Event59th Appita Annual Conference and Exhibition: Incorporating the 13th ISWFPC (International Symposium on Wood, Fibre and Pulping Chemistry) - Auckland, New Zealand
Duration: 16 May 200519 May 2005
Conference number: 59

Publication series

SeriesAppita Annual Conference Proceedings


Conference59th Appita Annual Conference and Exhibition
Country/TerritoryNew Zealand


Dive into the research topics of 'Fiber morphology responsible for restricted solubility of softwood kraft pulp in LiCl/DMAc'. Together they form a unique fingerprint.

Cite this