Enhancing the Stability of Aqueous Dispersions and Foams Comprising Cellulose Nanofibrils (CNF) with CaCO₃ Particles

Nanomaterials
Tiia-Maria TenhunenTekla Tammelin

Abstract

In this work, stability of dispersions and foams containing CaCO₃-based pigments and cellulose nanofibrils (CNF) was evaluated with the aim to reveal the mechanisms contributing to the overall stability of the selected systems. The utmost interest lies in the recently developed hydrocolloid hybrid CaCO₃ pigments and their potential to form bionanocomposite structures when incorporated with CNF. These pigments possess a polyelectrolyte layer deposited on the surface of the particle which is expected to enhance the compatibility between inorganic and organic components. Stability assessment of both dispersions and foams was conducted using turbidity profile scanning. In dispersions, CNF provides stability due to its ability to form a firm percolation network. If surface-modified pigments are introduced, the favourable surface interactions between the pigments and CNF positively influence the stability behaviour and even large macro-size pigments do not interfere with the stability of either dispersions or foams. In foams, the stability can be enhanced due to the synergistic actions brought by CNF and particles with suitable size, shape and wetting characteristics resulting in a condition where the stability mechanism is defined b...Continue Reading

References

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Citations

Dec 21, 2019·Chemical Communications : Chem Comm·Martin UhligRichard A Campbell
Nov 7, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Michal JablonskýJozef Šima
Sep 2, 2019·Carbohydrate Polymers·Ana F LourençoPaulo J T Ferreira
Jan 25, 2022·Journal of the American Chemical Society·Shi ZhangMarc Pera-Titus

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Methods Mentioned

BETA
Scanning electron microscopy

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