University of Oulu

Sethi, J., Oksman, K., Illikainen, M., Sirviö, J. (2018) Sonication-assisted surface modification method to expedite the water removal from cellulose nanofibers for use in nanopapers and paper making. Carbohydrate Polymers, 197, 92-99. doi:10.1016/j.carbpol.2018.05.072

Sonication-assisted surface modification method to expedite the water removal from cellulose nanofibers for use in nanopapers and paper making

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Author: Sethi, Jatin1; Oksman, Kristiina1,2; Illikainen, Mirja1;
Organizations: 1Fibre Particle Engineering, University of Oulu, Oulu, Finland
2Division of Materials Science, Luleå University of Technology, Luleå, Sweden
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe201902276409
Language: English
Published: Elsevier, 2018
Publish Date: 2019-05-26
Description:

Abstract

This paper addresses the issue of high water retention by cellulose nanofibers (CNFs) that lead to exorbitant time consumption in the dewatering of CNF suspensions. This has been a bottleneck, which is restricting the commercialization of CNF derived products such as nanopapers and CNF reinforced paper sheets. As a remedy, we suggest an eco-friendly water-based approach that involves the use of sonication energy and lactic acid (LA) to modify the surface of CNFs. The suggested modification resulted in rapid water drainage, and dewatering was completed in 10 min; with unmodified CNFs, it took around 45 min. We have also compared the draining characteristics of LA modification of CNF suspensions with a common draining agent (NaCl); LA modification drains water 56% faster than the use of NaCl, and produced mechanically superior dimensionally stable nanopaper. Additionally, LA modification allows the addition of 10 wt.% CNF in paper sheets, with dewatering done in 2 min (while the unmodified CNFs took 23 min).

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Series: Carbohydrate polymers
ISSN: 0144-8617
ISSN-E: 1879-1344
ISSN-L: 0144-8617
Volume: 197
Pages: 92 - 99
DOI: 10.1016/j.carbpol.2018.05.072
OADOI: https://oadoi.org/10.1016/j.carbpol.2018.05.072
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Subjects:
Funding: This work was partially funded by the TEKES FiDiPro Program.
Dataset Reference: Supplementary data:
  https://ars.els-cdn.com/content/image/1-s2.0-S014486171830626X-mmc1.docx
Copyright information: © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/