Effect of acid and enzymatic treatments of TCF dissolving pulp on the properties of wet spun cellulosic fibres

M. Vehviläinen, T. Kamppuri, P. Nousiainen, Anne Kallioinen, Matti Siika-aho, K. E. Christoffersson, M. Rom, J. Janicki

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)

Abstract

Dissolving-grade softwood pulp was treated with EG-rich enzymes and hot diluted sulphuric acid, to decrease the molecular weight of cellulose. The treated samples were dissolved in aqueous sodium zincate and spun into cellulosic fibres by a wet spinning method. The effects of cellulose concentration in the spinning solution and of cellulose molecular weight on the fibre properties were studied. The molecular weight (Mw) of the treated cellulose decreased by 38 to 63%, depending on the treatment parameters. The falling ball viscosity of the alkaline solution prepared from the differently treated pulps correlated linearly with the Mw of the treated cellulose. At constant Mw of cellulose, the tenacity of the obtained wet spun fibres correlated positively with the cellulose concentration of the spinning solution. However, a higher cellulose concentration could not compensate the lowered Mw as to the fibre properties.
Original languageEnglish
Pages (from-to)147-151
Number of pages5
JournalCellulose chemistry and technology
Volume44
Issue number4-6
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed

Keywords

  • Cellulosic fibres
  • Enzymatic treatment of cellulose
  • Wet spinning

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