The effect of the outermost fibre layers on solubility of dissolving grade pulp

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• 作者：S. Gr?nqvist ; A. Treimanis ; T. Kamppuri ; T. Maloney ; M. Skute ; U. Grinfelds…
• 关键词：Cellulose dissolution ; Dissolving pulp ; Hydromechanical peeling ; Enzymatic hydrolysis ; Porosity ; Solute exclusion
• 刊名：Cellulose
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：22
• 期：6
• 页码：3955-3965
• 全文大小：1,086 KB
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• 作者单位：S. Gr?nqvist (1)
  A. Treimanis (2)
  T. Kamppuri (3)
  T. Maloney (4)
  M. Skute (2)
  U. Grinfelds (2)
  M. Vehvil?inen (3)
  A. Suurn?kki (1)
  
  1. VTT Technical Research Centre of Finland, P.O. Box 1000, 02044 VTT, Espoo, Finland
  2. Latvian State Institute of Wood Chemistry, Dzerbenes iela 27, Riga, 1006, Latvia
  3. Tampere University of Technology, Materials Science, PL 527, 33101, Tampere, Finland
  4. Department of Forest Products Technology, Aalto University School of Chemical Technology, P.O. Box 16300, 00076 AALTO, Espoo, Finland
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Bioorganic Chemistry
  Physical Chemistry
  Organic Chemistry
  Polymer Sciences
  
• 出版者：Springer Netherlands
• ISSN：1572-882X

文摘

Dissolving pulps are used to manufacture various cellulose derived products through cellulose dissolution. Solubility of cellulose pulp has been claimed to be strongly dependent on the porosity development, the degree of polymerisation and the pulp viscosity. The removal of external cell walls has been proposed to have a key role in the pulp solubility. In this paper, the effect of the outermost surface layers on the solubility of a dissolving grade pulp was studied. Furthermore the effect of mechanical peeling and combined mechanical and enzymatic treatment on pulp solubility was compared. Based on the results combined mechanical and enzymatic treatment efficiently opens up the fibre structure and has a clear positive effect on the solubility of dissolving pulp. It seems that long fibre fraction is less accessible to solvent chemicals than the other pulp fractions. Mechanical peeling of outer fibre layers does not improve fibre dissolution to NaOH/ZnO. Thus, it seems that peeling alone is not a sufficient pre-treatment prior to dissolution. The results also revealed that the peeling treatment does not enhance the effects of enzymes as the studied mechanical treatment does. Keywords Cellulose dissolution Dissolving pulp Hydromechanical peeling Enzymatic hydrolysis Porosity Solute exclusion