Temperature stability of nanocellulose dispersions

被引：82

作者：

Heggset, Ellinor B. ^{[1
]}

Chinga-Carrasco, Gary ^{[1
]}

Syverud, Kristin ^{[1
,2
]}

机构：

[1] Paper & Fibre Res Inst PFI, Hgsk Ringen 6b, NO-7491 Trondheim, Norway

[2] Norwegian Univ Sci & Technol NTNU, Dept Chem Engn, N-7491 Trondheim, Norway

来源：

CARBOHYDRATE POLYMERS | 2017年 / 157卷

关键词：

Cellulose nanofibrils; Cellulose nanocrystals; Rheology; Temperature stability; Drilling fluids; Enhanced oil recovery; ENHANCED OIL-RECOVERY; MICROFIBRILLATED CELLULOSE; NANOCRYSTALS; DEGRADATION; HYDROLYSIS; OXIDATION; HEAT;

D O I：

10.1016/j.carbpol.2016.09.077

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

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.

引用

页码：114 / 121

页数：8

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