Degradation of viscose fibers during acidic treatment

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • Kompetenzzentrum Holz GmbH
  • Lenzing AG

Abstract

Novel developments in the fiber sector require additional investigation of their behaviour during the production process. In the core step of the viscose process, cellulose fibres are regenerated in an acidic spinning bath. To investigate the influence of hemicellulose content and temperature on the kinetics of fiber degradation, standard and hemicellose-enriched fibers were treated in the acidic standard spinning bath for time periods up to 292 h. Viscose samples of different hemicellulose content were prepared under standardized conditions and the never dried fibres were subjected to long term degradation in the standard spinning bath at 40, 50 and 60 A degrees C. The changes in the degree of polymerization (DP), molar mass distribution, hemicellulose and the generation of the total organic carbon in the spinning bath were monitored. Further, the changes in crystallinity and the level-off-DP of the fibers were determined to improve the accuracy of the existing degradation model. Changes in morphology of the fibers were monitored by optical microscopy and scanning electron microscopy.

Details

Original languageEnglish
Pages (from-to)213-229
Number of pages17
JournalCellulose
Volume23
Issue number1
Publication statusPublished - Feb 2016
MoE publication typeA1 Journal article-refereed

    Research areas

  • Acid hydrolysis, Cellulose degradation kinetics, Crystallinity changes, Hemi-rich viscose fibers, SUGARCANE BAGASSE HYDROLYSATE, REGENERATED CELLULOSE FIBERS, SOLID-STATE NMR, HYDROGEN-PRODUCTION, HIGH-TEMPERATURE, SULFURIC ACIDS, CANE BAGASSE, FORMIC-ACID, KINETICS, HEMICELLULOSES

ID: 1518678