TY - JOUR
T1 - High shear capillary rheometry of cellulose nanocrystals for industrially relevant processing
AU - Sutliff, Bradley P.
AU - Das, Arit
AU - Youngblood, Jeffrey
AU - Bortner, Michael J.
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2020/3/1
Y1 - 2020/3/1
N2 - A microcapillary rheometer was employed to study the rheological characteristics of CNCs at temperatures between 15 °C and 50 °C and aqueous concentrations between 1.5 wt% and 12.1 wt%, at rates up to 8 × 105 s−1. Time-temperature and time-concentration superposition were applied to analyze the data. A master curve of shear rate sweeps at temperatures between 15 °C and 50 °C was successfully generated to a reference temperature of 25 °C with the shift factor plot suggesting an Arrhenius relationship over the entire measured temperature range. Concentration-dependent data indicate a high shear Newtonian plateau at the limit of low concentration. Repeated testing of the same sample volume was implemented to represent extended times at elevated stress, with repeated experiments leading to a permanent decrease in viscosity. Atomic force microscopy (AFM) suggests sensitivity of the CNC geometry to moderate stress in a flow field.
AB - A microcapillary rheometer was employed to study the rheological characteristics of CNCs at temperatures between 15 °C and 50 °C and aqueous concentrations between 1.5 wt% and 12.1 wt%, at rates up to 8 × 105 s−1. Time-temperature and time-concentration superposition were applied to analyze the data. A master curve of shear rate sweeps at temperatures between 15 °C and 50 °C was successfully generated to a reference temperature of 25 °C with the shift factor plot suggesting an Arrhenius relationship over the entire measured temperature range. Concentration-dependent data indicate a high shear Newtonian plateau at the limit of low concentration. Repeated testing of the same sample volume was implemented to represent extended times at elevated stress, with repeated experiments leading to a permanent decrease in viscosity. Atomic force microscopy (AFM) suggests sensitivity of the CNC geometry to moderate stress in a flow field.
KW - Cellulose nanocrystal (CNC) suspensions
KW - High shear rate rheology
KW - Time-concentration superposition
KW - Time-temperature superposition
UR - http://www.scopus.com/inward/record.url?scp=85076710661&partnerID=8YFLogxK
U2 - 10.1016/j.carbpol.2019.115735
DO - 10.1016/j.carbpol.2019.115735
M3 - Article
C2 - 31888852
AN - SCOPUS:85076710661
SN - 0144-8617
VL - 231
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
M1 - 115735
ER -