NDLI: Dissolving-grade birch pulps produced under various prehydrolysis intensities: quality, structure and applications

Content Provider	Springer Nature Link
Author	Testova, Lidia Borrega, Marc Tolonen, Lasse K. Penttilä, Paavo A. Serimaa, Ritva Larsson, Per Tomas Sixta, Herbert
Copyright Year	2014
Abstract	Aqueous-phase prehydrolysis followed by alkaline pulping is a viable process to produce wood-based dissolving pulps. However, detailed characterisation of the achievable pulp quality, performance and cellulose structure is yet lacking. In this study, the production of hemicellulose-lean birch soda-anthraquinone pulps after prehydrolysis under various intensities was investigated. Increasing prehydrolysis intensity resulted in pulps of higher purity but lower cellulose yield and degree of polymerisation. Higher cellulose yield by using sodium borohydride during pulping was achieved at the expense of reducing pulp purity. Cellulose crystallinity was similar in all pulps indicating simultaneous degradation of both crystalline and amorphous cellulose regions. Reinforced prehydrolysis seemingly increased the cellulose crystal size and the interfibrillar distances. Moderate intensity prehydrolysis (170 °C) resulted in a pulp well suited for viscose application, whereas reinforced prehydrolysis favoured the production of acceptable cellulose triacetate dope. The performance of the pulps in viscose and acetate applications was strongly related to the chemical and structural properties.
Starting Page	2007
Ending Page	2021
Page Count	15
File Format	PDF
ISSN	09690239
Journal	Cellulose
Volume Number	21
Issue Number	3
e-ISSN	1572882X
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-01-31
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cellulose acetate Cellulose structure Dissolving pulp Macromolecular properties Prehydrolysis Viscose Bioorganic Chemistry Physical Chemistry Organic Chemistry Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Polymers and Plastics

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