University of Oulu

Sirviö, J. (2019) Fabrication of regenerated cellulose nanoparticles by mechanical disintegration of cellulose after dissolution and regeneration from a deep eutectic solvent. Journal of Materials Chemistry A, 7 (2), 755-763. doi:10.1039/C8TA09959F

Fabrication of regenerated cellulose nanoparticles by mechanical disintegration of cellulose after dissolution and regeneration from a deep eutectic solvent

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Author: Sirviö, Juho1
Organizations: 1Fibre and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, 90014 Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.1 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe201902266300
Language: English
Published: Royal Society of Chemistry, 2019
Publish Date: 2019-02-26
Description:

Abstract

Cellulose nanoparticles are promising sustainable nanosized materials for use, for example, as nanofillers (such as reinforcement agents), green water purification chemicals, and oil dispersants. In this work, regenerated cellulose nanoparticles (RCNPs) were produced by mechanical disintegration of wood cellulose fibers and microcrystalline cellulose after dissolution and regeneration from a deep eutectic solvent (DES). An easily obtained DES based on guanidine hydrochloride and anhydrous phosphoric acid (molar ratio 1 : 2) was used to dissolve cellulose at room temperature. The degree of polymerization (DP) of cellulose was observed to decrease during the dissolution, whereas the crystallinity changed from cellulose I to cellulose II. After precipitation and washing, the regenerated cellulose was easily disintegrated to evenly distributed nanosized (diameter around 6 nm) fibrous cellulose nanoparticles. RCNPs were investigated as fillers in poly(vinyl alcohol) (PVA) composite films. Due to their small, fibrous and flexible nature, at low concentrations (1–5 wt%) RCNPs improved the elongation of the PVA film without diminishing its strength properties. At higher concentrations, RCNPs from wood pulp improved the tensile strength, as well as the modulus of PVA, similar to commercial cellulose nanocrystals. Therefore, this method provides a feasible way to obtain a unique nanosized cellulose material with good uniform size distribution and adjustable reinforcement properties.

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Series: Journal of materials chemistry. A, Materials for energy and sustainability
ISSN: 2050-7488
ISSN-E: 2050-7496
ISSN-L: 2050-7488
Volume: 7
Issue: 2
Pages: 755 - 763
DOI: 10.1039/C8TA09959F
OADOI: https://oadoi.org/10.1039/C8TA09959F
Type of Publication: A1 Journal article – refereed
Field of Science: 221 Nanotechnology
Subjects:
Copyright information: This journal is © The Royal Society of Chemistry 2019. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.
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