Journal
CARBOHYDRATE POLYMERS
Volume 157, Issue -, Pages 114-121Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.09.077
Keywords
Cellulose nanofibrils; Cellulose nanocrystals; Rheology; Temperature stability; Drilling fluids; Enhanced oil recovery
Categories
Funding
- Research Council of Norway [217212, 244615/E30]
- Elkem
- Statoil
- Treklyngen
Ask authors/readers for more resources
Cellulose nanofibrils (CNF) have potential as rheology modifiers of water based fluids, e.g. drilling fluids for use in oil wells or as additives in injection water for enhanced oil recovery (EOR). The temperature in oil wells can be high (>100 degrees C), and the retention time long; days for drilling fluids and months for EOR fluids. Hence, it is important to assess the temperature stability over time of nanocellulose dispersions to clarify their suitability as rheology modifiers of water based fluids at such harsh conditions. Dispersions of CNF produced mechanically, by using TEMPO mediated oxidation and by using carboxymethylation as pretreatment, in addition to cellulose nanocrystals (CNC), have been subjected to heat aging. Temperature stability was best for CNC and for mechanically produced CNF that were stable after heating to 140 degrees C for three days. The effect of additives was evaluated; cesium formate and sodium formate increased the temperature stability of the dispersions, while there was no effect of using phosphate buffer. (C) 2016 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available