Urška Šebenik (Author), Romano Lapasin (Author), Matjaž Krajnc (Author)

Abstract

The viscoelastic and flow properties of aqueous Laponite/TEMPO-oxidized nanofibrillated cellulose (TEMPO-NFC) systems are investigated with the aim to study the effect of content and proportion of both components on the properties. Both Laponite and TEMPO-NFC aqueous dispersions can find numerous applications in different fields (from industrial to biomedical one) due to their structural and rheological properties. The most important effects of blending are observed at low Laponite fractions, also with qualitative changes in the shape of the flow curves and mechanical spectra. Positive synergistic effects are ascribed to the interpenetration and electrostatic interactions between TEMPO-NFC fibrils and Laponite nanodisks. These mechanisms are more effective in Laponite-poor blends when a minority of clay nanoparticles and its aggregated forms are distributed within the nanocellulose matrix, acting as bridging agents between polymer nanofibrils. The synergistic effects are compared to those observed for Laponite blends with a nonionic biopolymer, scleroglucan.

Keywords

TEMPO-oksidirana nanofibrilirana celuloza;laponit;učinki mešanja;hidrogeli;reologija;TEMPO-oxidized nanofibrillated cellulose;laponite;blending effects;hydrogels;rheology;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FKKT - Faculty of Chemistry and Chemical Technology
UDC: 532.135:678
COBISS: 12992515 Link will open in a new window
ISSN: 0144-8617
Views: 870
Downloads: 298
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Other data

Secondary language: Slovenian
Secondary keywords: TEMPO-oksidirana nanofibrilirana celuloza;laponit;učinki mešanja;hidrogeli;reologija;
Type (COBISS): Article
Embargo end date (OpenAIRE): 2021-04-21
Pages: str. 1-12
Issue: ǂVol. ǂ240
Chronology: 15 Jul. 2020
DOI: 10.1016/j.carbpol.2020.116330
ID: 11688438