Rheological Studies of Microfibrillar Cellulose Water Dispersions
By M. Iotti, Ø. Gregersen, S. Moe, M. Lenes. 2011
294 citations recorded by the source corpus.
The rheological behaviour of microfibrillar cellulose (MFC) water dispersions has been investigated. For the first time a detailed study of shear dependent viscosity at low and high shear rate is presented. A peculiar time dependent behaviour measured in the area between 0 and 1000 s−1 was identified. The study shows a hysteresis loop in the shear rate–viscosity relationship at low shear rate. Additional time dependent shear rate measurements were performed, and a hypothesis for a mechanism of interaction and formation of a fibrils network was suggested. Higher temperature caused lower viscosity values, and this difference was increased at higher shear rate values. Oscillatory measurements showed how the closeness of the fibrils helps network creations. Data obtained from high shear measurements showed that 1% MFC water dispersions had a dilatant behaviour at ultra high shear rates with values increasing from 120 to 300 Pa s in the area between 180,000 and 330,000 s−1 .
Subfields: Biomaterials, Biomedical Engineering
View Paper: https://www.semanticscholar.org/paper/b6e972a44fd86e84af4add6f48ca50c303b05375
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Citations in the corpus
- Flocculation of microfibrillated cellulose in shear flow (2012, unknown): “MFC has high viscosity at low shear rates, and it shows significant shear thinning with increasing shear rates (Pääkkö et al. 2007; Agoda-Tandjawa et al. 2010; Iotti et al. 2011).”
- Impact of different coating processes of microfibrillated cellulose on the mechanical and barrier properties of paper (2014, background): “nano-network stability under shearing [30].”
- Carboxymethylated nanofibrillated cellulose: rheological studies (2014, unknown): “These investigated systems display the wellknown (Lasseuguette et al. 2008; Herrick et al. 1983; Iotti et al. 2011; Karppinen et al. 2012) shear-thinning behaviour with increasing shear rate associated with NFC systems; the observed increasing shear viscosity with increasing dry content is another…”
- Microfibrillated cellulose - its barrier properties and applications in cellulosic materials: a review. (2012, background): “bleached sulfate pulp (Picea abies) – Iotti et al. (2010) J Polym Environ,”
- Processing of wood-based microfibrillated cellulose and nanofibrillated cellulose, and applications relating to papermaking: a review (2016, background): “The rheological investigation of MFC presented by Iotti et al. (2011) gives useful insights regarding shear rates and oscillatory measurements (storage and loss moduli).”
- Cellulose nanofibrils: Challenges and possibilities as a paper additive or coating material – A review (2014, background): “Higher temperature can be used to lower viscosity of CNF suspensions, especially at high shear rates (Iotti et al. 2011).”