Comparison of the extensional and shear viscosity characteristics of aqueous hydroxyethyl cellulose solutions

Meadows, J.; Williams, P. A.; Kennedy, John C.

doi:10.1021/ma00112a013

Cited by 29 publications

(30 citation statements)

References 4 publications

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“…These will be referred to as dilute, semidilute and melt regimes, and the justification for the same will be established as we discuss these regions in finer details. The viscosity data is often displayed as a master plot of Á sp versus c[Á] to demarcate the dilute and semidilute regions [11]. The change in the slope in the data occurs due to progressive overlap of coils as semidilute region is approached.…”

Section: Resultsmentioning

confidence: 99%

“…Their results predict that the 3D solubility parameters of this class of polymers are governed by polar and hydrogen bonding interactions. A systematic extensional and shear viscosity characterization of aqueous HEC solutions was carried out by Meadows et al [11] where dilute solution to semidilute regime crossover was observed from intrinsic viscosity data. Roy et al [12] reported observation of a dilute solution regime for cellulose concentration less than 1% (w/v) whereas irreversible aggregate based gelation was observed at higher polymer concentrations.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Concentration selective hydration and phase states of hydroxyethyl cellulose (HEC) in aqueous solutions

Arfin¹,

Bohidar²

2012

International Journal of Biological Macromolecules

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Concentration selective hydration and phase states of hydroxyethyl cellulose (HEC) in aqueous solutions

Arfin¹,

Bohidar²

2012

International Journal of Biological Macromolecules

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“…Apart from CMC, other cellulose derivatives are also widely used as rheology modifiers. For example, Meadows et al () measured the extensional and shear viscosities of varying concentration of three hydroxyethyl cellulose (HEC) samples. The samples varied in their molecular mass, that is low (HEC‐low), medium (HEC‐med) and high (HEC‐high).…”

Section: Shear and Extensional Rheology Of Selected Polysaccharidesmentioning

confidence: 99%

Shear and extensional rheology of selected polysaccharides

Evageliou

2020

Int J of Food Sci Tech

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Rheology is used for the elucidation of the flow properties of polysaccharide solutions. For a given polysaccharide, both shear and extensional rheological experiments should be performed for the full characterisation of its flow properties. The provided information will facilitate the efficient exploitation of a polysaccharide in various applications. Although shear rheology is widely used in polysaccharides' characterisation, there are only limited extensional rheology studies due to lack of reliable techniques in the formation of pure extensional flow. However, recently, several commercial extensional rheometers have been developed and thus, accurate extensional experiments can now be performed. The present work initially presents the principles and concepts of both shear and extensional rheology and then reports rheological findings for solutions of various polysaccharides and their derivatives. Xanthan and various members of the galactomannan, cellulose and alginate families were selected.

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“…The onset of extensional viscosity-the transition point between shear-dominant and extensional dominant flow-depends on polymer, solvent, and porous media properties. The effects of polymer properties on extensional viscosity can be investigated by using special rheometers that only generate pure extensional flow [47][48][49][50][51][52][53][54][55][56]. In the following, the effects of polymer, solvent and porous media properties on the onset of extensional viscosity are explained.…”

Section: Extensional Viscositymentioning

confidence: 99%

Polymer Flow in Porous Media: Relevance to Enhanced Oil Recovery

Skauge

Zamani

Jacobsen

et al. 2018

Colloids and Interfaces

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Polymer flooding is one of the most successful chemical EOR (enhanced oil recovery) methods, and is primarily implemented to accelerate oil production by sweep improvement. However, additional benefits have extended the utility of polymer flooding. During the last decade, it has been evaluated for use in an increasing number of fields, both offshore and onshore. This is a consequence of (1) improved polymer properties, which extend their use to HTHS (high temperature high salinity) conditions and (2) increased understanding of flow mechanisms such as those for heavy oil mobilization. A key requirement for studying polymer performance is the control and prediction of in-situ porous medium rheology. The first part of this paper reviews recent developments in polymer flow in porous medium, with a focus on polymer in-situ rheology and injectivity. The second part of this paper reports polymer flow experiments conducted using the most widely applied polymer for EOR processes, HPAM (partially hydrolyzed polyacrylamide). The experiments addressed highrate, near-wellbore behavior (radial flow), reservoir rate steady-state flow (linear flow) and the differences observed in terms of flow conditions. In addition, the impact of oil on polymer rheology was investigated and compared to single-phase polymer flow in Bentheimer sandstone rock material. Results show that the presence of oil leads to a reduction in apparent viscosity.

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Comparison of the extensional and shear viscosity characteristics of aqueous hydroxyethyl cellulose solutions

Cited by 29 publications

References 4 publications

Concentration selective hydration and phase states of hydroxyethyl cellulose (HEC) in aqueous solutions

Concentration selective hydration and phase states of hydroxyethyl cellulose (HEC) in aqueous solutions

Shear and extensional rheology of selected polysaccharides

Polymer Flow in Porous Media: Relevance to Enhanced Oil Recovery

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