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 by the formation of a continuous plateau border incorporating a CNF network which is able to trap the inorganic particles uniformly.
| Original language | English |
|---|---|
| Article number | 651 |
| Journal | Nanomaterials |
| Volume | 8 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 1 Sep 2018 |
| MoE publication type | Not Eligible |
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Keywords
- Cellulose nanofibrils (CNF)
- Cellulose-based foam
- Dispersion stability
- Hybrid hydrocolloid pigments
- Inorganic-organic hybrid materials
- Nanocellulose-CaCo containing foams
- Percolation network
- Plateau border stability in aqueous foams
- Stability enhancement of foams
Cite this
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Enhancing the stability of aqueous dispersions and foams comprising cellulose nanofibrils (CNF) with CaCo3 particles. / Tenhunen, Tiia Maria; Pöhler, Tiina; Kokko, Annaleena; Orelma, Hannes; Schenker, Michel; Gane, Patrick (Corresponding Author); Tammelin, Tekla (Corresponding Author).
In: Nanomaterials, Vol. 8, No. 9, 651, 01.09.2018.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Enhancing the stability of aqueous dispersions and foams comprising cellulose nanofibrils (CNF) with CaCo3 particles
AU - Tenhunen, Tiia Maria
AU - Pöhler, Tiina
AU - Kokko, Annaleena
AU - Orelma, Hannes
AU - Schenker, Michel
AU - Gane, Patrick
AU - Tammelin, Tekla
N1 - ISSN tarkistettu 26.9.18
PY - 2018/9/1
Y1 - 2018/9/1
N2 - 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 by the formation of a continuous plateau border incorporating a CNF network which is able to trap the inorganic particles uniformly.
AB - 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 by the formation of a continuous plateau border incorporating a CNF network which is able to trap the inorganic particles uniformly.
KW - Cellulose nanofibrils (CNF)
KW - Cellulose-based foam
KW - Dispersion stability
KW - Hybrid hydrocolloid pigments
KW - Inorganic-organic hybrid materials
KW - Nanocellulose-CaCo containing foams
KW - Percolation network
KW - Plateau border stability in aqueous foams
KW - Stability enhancement of foams
UR - http://www.scopus.com/inward/record.url?scp=85052623100&partnerID=8YFLogxK
U2 - 10.3390/nano8090651
DO - 10.3390/nano8090651
M3 - Article
VL - 8
JO - Nanomaterials
JF - Nanomaterials
SN - 2079-4991
IS - 9
M1 - 651
ER -