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The use of microfibrillated cellulose in fine paper manufacturing: Results from a pilot scale papermaking trial
Innventia AB, Sweden.
Innventia AB, Sweden.
KTH, Skolan för kemivetenskap (CHE), Centra, Wallenberg Wood Science Center. Innventia AB, Sweden.ORCID-id: 0000-0003-3737-0091
2014 (engelsk)Inngår i: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 29, nr 3, s. 476-483Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In this work the strength enhancing capabilities of microfibrillated cellulose (MFC) in highly filled papers was studied. Both the MFC production and the paper making were done in pilot scale under realistic industrial conditions. The results clearly show that MFC (2.5 - 5.0wt-%) could improve the mechanical properties of highly filled papers (20 - 35 wt-% filler contents). All studied dry mechanical properties were improved and the improvements were most pronounced for Z-strength and fracture toughness. By combining the MFC with a C-starch dosage further improvements in mechanical properties could be achieved. The improvements in mechanical properties enabled increased filler content with retained properties. The filler increase could be achieved at the same time as the sheet formation and the dry content after pressing were improved.

sted, utgiver, år, opplag, sider
2014. Vol. 29, nr 3, s. 476-483
Emneord [en]
Mechanical properties, Microfibrillated cellulose, Nanocellulose, Papermaking
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-159218DOI: 10.3183/NPPRJ-2014-29-03-p476-483Scopus ID: 2-s2.0-84907664893OAI: oai:DiVA.org:kth-159218DiVA, id: diva2:783362
Merknad

QC 20150126

Tilgjengelig fra: 2015-01-26 Laget: 2015-01-26 Sist oppdatert: 2017-12-05bibliografisk kontrollert
Inngår i avhandling
1. Microfibrillated cellulose: Energy-efficient preparation techniques and applications in paper
Åpne denne publikasjonen i ny fane eller vindu >>Microfibrillated cellulose: Energy-efficient preparation techniques and applications in paper
2015 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

This work describes three alternative processes for producing microfibrillated cellulose (MFC; also referred to as cellulose nanofibrils, CNF) in which bleached pulp fibres are first pretreated and then homogenized using a high-pressure homogenizer. In one process, fibre cell wall delamination was facilitated by a combined enzymatic and mechanical pretreatment. In the two other processes, cell wall delamination was facilitated by pretreatments that introduced anionically charged groups into the fibre wall, by means of either a carboxymethylation reaction or irreversibly attaching carboxymethylcellulose (CMC) to the fibres. All three processes are industrially feasible and enable energy-efficient production of MFC. Using these processes, MFC can be produced with an energy consumption of 500–2300 kWh/tonne. These materials have been characterized in various ways and it has been demonstrated that the produced MFCs are approximately 5–30 nm wide and up to several microns long.

The MFCs were also evaluated in a number of applications in paper. The carboxymethylated MFC was used to prepare strong free-standing barrier films and to coat wood-containing papers to improve the surface strength and reduce the linting propensity of the papers. MFC, produced with an enzymatic pretreatment, was also produced at pilot scale and was studied in a pilot-scale paper making trial as a strength agent added at the wet-end for highly filled papers.

sted, utgiver, år, opplag, sider
Stockholm: KTH Royal Institute of Technology, 2015. s. 63
Serie
TRITA-CHE-Report, ISSN 1654-1081 ; 2015:5
Emneord
Microfibrillated cellulose, microfibrillar cellulose, nanofibrillated cellulose, nanofibrillar cellulose, cellulose nanofibrils, nanocellulose, MFC, NFC, CNF, production techniques, energy efficient, gel properties, films, enzymes, carboxymethylation, carboxymethyl cellulose, CMC, mechanical properties, oxygen barrier, homogenization, linting, papermaking
HSV kategori
Forskningsprogram
Fiber- och polymervetenskap
Identifikatorer
urn:nbn:se:kth:diva-159222 (URN)978-91-7595-426-4 (ISBN)
Disputas
2015-02-27, F3, Lindstedtsvägen 26, KTH, Stockholm, 10:00 (engelsk)
Opponent
Veileder
Merknad

QC 20150126

Tilgjengelig fra: 2015-01-26 Laget: 2015-01-26 Sist oppdatert: 2019-12-20bibliografisk kontrollert

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