caa a22 4500 445384344 CHVBK 20180317143027.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10924-010-0248-2 doi (NATIONALLICENCE)springer-10.1007/s10924-010-0248-2 Rheological Studies of Microfibrillar Cellulose Water Dispersions [Elektronische Daten] [Marco Iotti, Øyvind Gregersen, Størker Moe, Marianne Lenes] 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 1000s−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 300Pas in the area between 180,000 and 330,000s−1 . The Author(s), 2010 Microfibrillar cellulose nationallicence Rheology nationallicence Coating nationallicence Packaging nationallicence Iotti Marco Department of Chemical Engineering, NTNU, Sem Sælandsvei 4, 7491, Trondheim, Norway aut Gregersen Øyvind Department of Chemical Engineering, NTNU, Sem Sælandsvei 4, 7491, Trondheim, Norway aut Moe Størker Department of Chemical Engineering, NTNU, Sem Sælandsvei 4, 7491, Trondheim, Norway aut Lenes Marianne Paper and Fibre Research institute, PFI, Høgskoleringen 6B, 7491, Trondheim, Norway aut Journal of Polymers and the Environment Springer US; http://www.springer-ny.com 19/1(2011-03-01), 137-145 1566-2543 19:1<137 2011 19 10924 https://doi.org/10.1007/s10924-010-0248-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10924-010-0248-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Iotti Marco Department of Chemical Engineering, NTNU, Sem Sælandsvei 4, 7491, Trondheim, Norway aut NATIONALLICENCE 700 1- Gregersen Øyvind Department of Chemical Engineering, NTNU, Sem Sælandsvei 4, 7491, Trondheim, Norway aut NATIONALLICENCE 700 1- Moe Størker Department of Chemical Engineering, NTNU, Sem Sælandsvei 4, 7491, Trondheim, Norway aut NATIONALLICENCE 700 1- Lenes Marianne Paper and Fibre Research institute, PFI, Høgskoleringen 6B, 7491, Trondheim, Norway aut NATIONALLICENCE 773 0- Journal of Polymers and the Environment Springer US; http://www.springer-ny.com 19/1(2011-03-01), 137-145 1566-2543 19:1<137 2011 19 10924 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer