Projects per year
Abstract
The structure of dispersions of TEMPO-oxidised cellulose nanofibrils (OCNF), at various concentrations, in water and in NaCl aqueous solutions, was probed using small angle X-ray scattering (SAXS). OCNF are modelled as rod-like particles with an elliptical cross-section of 10 nm and a length greater than 100 nm. As OCNF concentration increases above 1.5 wt%, repulsive interactions between fibrils are evidenced, modelled by the interaction parameter ν RPA > 0. This corresponds to gel-like behaviour, where G′ > G′′ and the storage modulus, G′, shows weak frequency dependence. Hydrogels can also be formed at OCNF concentration of 1 wt% in 0.1 M NaCl(aq). SAXS patterns shows an increase of the intensity at low angle that is modelled by attractive interactions (ν RPA < 0) between OCNF, arising from the screening of the surface charge of the fibrils. Results are supported by ζ potential and cryo-TEM measurements.
Original language | English |
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Pages (from-to) | 16012-16020 |
Number of pages | 9 |
Journal | Physical Chemistry Chemical Physics |
Volume | 20 |
Issue number | 23 |
Early online date | 24 May 2018 |
DOIs | |
Publication status | Published - 21 Jun 2018 |
ASJC Scopus subject areas
- General Physics and Astronomy
- Physical and Theoretical Chemistry
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Dive into the research topics of 'TEMPO-oxidized cellulose nanofibrils; probing the mechanisms of gelation via Small Angle X-Ray Scattering'. Together they form a unique fingerprint.Projects
- 1 Finished
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New Enzymatically Produced Interpenetrating Starch-Cellulose Gels
Edler, K. (PI) & Scott, J. L. (CoI)
Engineering and Physical Sciences Research Council
6/06/16 → 31/01/21
Project: Research council
Datasets
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Dataset for "TEMPO-oxidized cellulose nanofibrils; probing the mechanisms of gelation via Small Angle X-Ray Scattering"
Schmitt, J. (Creator), Calabrese, V. (Researcher), Alves Da Silva, M. (Researcher), Edler, K. (Project Leader) & Scott, J. L. (Project Manager), University of Bath, 2018
DOI: 10.15125/BATH-00471
Dataset