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Preparation of individualised lignocellulose microfibrils based on thermomechanical pulp and their effect on paper properties
RISE, Innventia, PFI – Paper and Fiber Research Institute.
RISE, Innventia, PFI – Paper and Fiber Research Institute.
2015 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 30, no 3, p. 443-451Article in journal (Refereed) Published
Abstract [en]

Although mechanical pulp can be considered as a potential raw material for preparation of microfibrils, suitable pre-treatment methods have been missing. Consequently, the objectives of this study were firstly to find a suitable procedure to prepare lignocellulose microfibrils (LCMF) from fractionated thermo-mechanical pulp (TMP) and secondly to evaluate if these TMP-based materials could be used as paper additives to increase paper strength. Carboxymethylation was found to be a suitable pretreatment for both TMP fines and TMP fibres to enable preparation of individualised LCMF after subsequent homogenisation treatment. After air drying, this material formed dense continuous films in conformity with films prepared from cellulose microfibrils (CMF) originating from chemical pulp. Homogenisation only or sulphonation followed by homogenisation did not fibrillate the TMP samples into individualised LCMF. Analysis of paper properties showed that addition of 20% LCMF to a standard TMP furnish improved tensile strength index by 15%. The LCMF-containing papers were also more brittle (less elongation) than the other paper sheets in this study. Similar tensile strength index was also obtained for TMP fines treated by sulphonation followed by homogenisation.

Place, publisher, year, edition, pages
SPCI , 2015. Vol. 30, no 3, p. 443-451
Keywords [en]
Carboxymethylation, Homogenisation, Lignocellulose microfibrils, Paper, Tensile strength, Thermomechanical pulp, Cellulose, Cellulose films, Chemical pulp, Film preparation, Homogenization method, Lignin, Mechanical pulp, Pulp materials, Sulfonation, Thermomechanical pulping process, Cellulose microfibrils, Continuous films, Micro-fibrils, Paper properties, Paper strengths, Pre-Treatment, Pretreatment methods, Pulp, Additives, Cellulose Derivatives, Homogenization, Mechanical Pulps, Raw Materials
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:ri:diva-43917Scopus ID: 2-s2.0-84951795977OAI: oai:DiVA.org:ri-43917DiVA, id: diva2:1393024
Available from: 2020-02-14 Created: 2020-02-14 Last updated: 2020-02-19Bibliographically approved

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CiteExportLink to record
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