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Carboxymethylated nanofibrillated cellulose: Effect of monovalent electrolytes on the rheological properties
RISE, Innventia.
RISE, Innventia.ORCID iD: 0000-0001-7979-9158
2014 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 21, p. 3507-14Article in journal (Refereed) Published
Abstract [en]

The effect of the ionic strength on the properties of a carboxymethylated nanofibrillated cellulose (NFC) system was investigated through rheological studies. It was shown that homogenization of pulp suspensions containing a high amount of a monovalent electrolyte leads to the production of NFC systems displaying a lower magnitude in the rheological response as compared with systems prepared at lower ionic strengths conditions. It was further shown that increasing the ionic strength of NFC suspensions after their manufacturing also results in a lowering of the rheological response. The decreased rheological response in the former case was postulated to be caused by a lowering of the delamination deficiency of the homogenization process, due to decreased swelling of the carboxymethylated pulp, caused by the screening of the charges. In the latter case (post-addition of the electrolyte), the lowering of the rheological response was postulated to be due to the compression of the electrostatic double layer, when the electrostatic repulsion between the charged fibrils diminished in the presence of the electrolyte.

Place, publisher, year, edition, pages
2014. Vol. 21, p. 3507-14
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Nano Technology Paper, Pulp and Fiber Technology
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URN: urn:nbn:se:ri:diva-9810DOI: 10.1007/s10570-014-0394-0Scopus ID: 2-s2.0-84905880304OAI: oai:DiVA.org:ri-9810DiVA, id: diva2:968595
Available from: 2016-09-12 Created: 2016-09-12 Last updated: 2019-12-12Bibliographically approved

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Lindström, Tom

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