Rheological Behavior of Cellulose Fiber Suspensions: Application to Paper-Making Processing
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- 作者：Didier Chaussy ; Ce虂line Martin ; Jean-Claude Roux
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2011
- 出版时间：March 16, 2011
- 年：2011
- 卷：50
- 期：6
- 页码：3524-3533
- 全文大小：1087K
- 年卷期：v.50,no.6(March 16, 2011)
- ISSN：1520-5045
文摘
The refining operation of cellulose fibrous suspensions results in fibrillation, hydration, and shortening of fibers. To characterize the viscous behavior of such a suspension during processing, rheological properties of bleached softwood fibers are studied by considering a semi-industrial disk refiner as a parallel plate rheometer. The rheological behavior of fiber suspension is quantified and modeled using a modified Carreau鈭扽asuda equation. This model does not show discontinuities and enables the description of the pulp suspension behavior for the entire domain of shear rates (up to 2.1 脳 106 s鈭?). It points out a Newtonian behavior or a combination of a Newtonian followed by a shear thinning behavior after a limiting shear rate. Moreover, the measured apparent viscosity of the fiber suspension in the gap clearance is about 100 times higher than the viscosity of individualized fibers suspension.