University of Oulu

Ojala, J., Sirviö, J., Liimatainen, H. (2017) Preparation of cellulose nanocrystals from lignin-rich reject material for oil emulsification in an aqueous environment. Cellulose, (). doi:10.1007/s10570-017-1568-3

Preparation of cellulose nanocrystals from lignin-rich reject material for oil emulsification in an aqueous environment

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Author: Ojala, Jonna1; Sirviö, Juho A.1; Liimatainen, Henrikki1
Organizations: 1University of Oulu, Fibre and Particle Engineering
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe2017112250823
Language: English
Published: Springer Nature, 2018
Publish Date: 2018-11-14
Description:

Abstract

Cellulose nanocrystals (CNCs) with amphiphilic features were used in oil drop stabilization in diesel oil-in-water (o/w) emulsion. The functionalized CNCs were synthesized from a lignin-rich reject cellulose source from the pulp and paper industry, i.e., the non-bleached fines fractions of carton pulp. Partial periodate-chlorite oxidation, which was followed by reductive butylamination, was used to obtain surface-modified amphiphilic CNCs. All studied CNCs prevented droplet coalescence by stabilizing oil droplets in the emulsion thus resulting in stable o/w Pickering-like emulsions. CNCs from the fines fractions at concentrations 0.05–0.1% (weight by weight, w/w) provided high stability against creaming (i.e., phase separation), and they did not de-emulsify at low temperatures since the oil droplet size remained small at + 5 °C at a 0.05% (w/w) CNC concentration. Salinity improved the stability against creaming with the reference chemical pulp CNC, but negatively affected the emulsion creaming rate for CNCs that had a higher level of lignin. However, the non-bleached fines fraction of the pulp may provide one potential and cost-effective raw material source for the development of a novel bio-based chemical.

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Series: Cellulose
ISSN: 0969-0239
ISSN-E: 1572-882X
ISSN-L: 0969-0239
Issue: First online 14 November 2017
DOI: 10.1007/s10570-017-1568-3
OADOI: https://oadoi.org/10.1007/s10570-017-1568-3
Type of Publication: A1 Journal article – refereed
Field of Science: 215 Chemical engineering
Subjects:
Funding: This study was funded by the Academy of Finland (283187). The support of the Ahti Pekkala Foundation and the Tiina and Antti Herlin Foundation is gratefully acknowledged.
Academy of Finland Grant Number: 283187
Detailed Information: 283187 (Academy of Finland Funding decision)
Copyright information: © Springer Science+Business Media B.V., part of Springer Nature 2017.