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Multilayer assembly onto pulp fibres using oppositely charged microfibrillated celluloses, starches, and wetstrength resins’ Effect on mechanical properties of CTMP-sheets
RISE, Innventia.
RISE, Innventia.
2016 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 31, no 1, 135-141 p.Article in journal (Refereed) Published
Abstract [en]

The effects of multilayering of microfibrillar cellulose (MFC) onto a chemi-thermomechanical pulp (CTMP), from which the fines material had been removed, were investigated with regard to the mechanical properties of hand-sheets. In one series of experiments, the CTMP was multilayered with cationic MFC/anionic MFC (C-MFC/A-MFC) at various addition levels and sheets made in a conventional sheet former, pressed, and dried at room temperature. This experimental series was complemented with a second series, where sheets were made in a Rapid Köthen sheet former. In a third series of experiments, the CTMP was multilayered using a cationic polyamideamine epichlorohydrine resin (PAE) and an AMFC. Sheets were formed using the Rapid Köthen sheet former. Finally, in a fourth series of experiments, the MFC multilayering experiments were compared with multilayering experiments using cationic starch/anionic starch (C-starch/A-Starch). MFC-multilayering (C-MFC/A-MFC) gave inferior strength gain at a low addition level compared to starch multilayering, but (compared on a weight basis) the strength seemed to level off using starches at high addition levels, whereas there were a continuous increase in strength using MFC multilayering. Multilayering using PAE/A-MFC was found to give a higher strength gain than both C-MFC/A-MFC and C-starch/A-starch multilayering. Sheet density was slightly affected (<14%) by the multilayering techniques used in these experiments.

Place, publisher, year, edition, pages
2016. Vol. 31, no 1, 135-141 p.
Keyword [en]
Cellulose; Chemical modification; Mechanical properties; Mechanical pulp; Multilayers; Polyelectrolytes; Resins; Thermomechanical pulp, CTMP; Layer-by-layer assemblies; Microfibrillated cellulose; Multilayering; Polyelectrolyte multilayer, Starch, Cellulose Derivatives; Mechanical Properties; Sheet Formers; Starch; Synthetic Polymers
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:ri:diva-12629Scopus ID: 2-s2.0-84961626593OAI: oai:DiVA.org:ri-12629DiVA: diva2:971129
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cited By 0

Available from: 2016-09-15 Created: 2016-09-15 Last updated: 2016-09-15Bibliographically approved

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