Surface tension measurement of aqueous polymer solutions

Hu, Robert; Wang, A.T.A.; Hartnett, J.P.

doi:10.1016/0894-1777(91)90079-7

Cited by 44 publications

(35 citation statements)

References 3 publications

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“…Fig. 8 shows the measured viscosities for HEC 250HHR at various solution concentrations by Hu et al [52] and that for HEC-QP300 at various solution concentrations and water by Zhang [45]. It can be seen that aqueous HEC solutions are more viscous than pure water, and the viscosity of the aqueous polymeric additive solutions increases with increasing concentration for each polymer.…”

Section: The Effect Of Polymeric Additives On the Physical Propertiesmentioning

confidence: 90%

“…The measured viscosities for both SLS and Tween-80 aqueous solutions at room temperature are constant and independent of shear rates. Therefore, these two surfactant solutions show the Newtonian fluidic behavior in a wide concentration range of 125-500 ppm for polymeric surfactant solutions [52]. Post-micellar solutions, however, may show appreciable increases in dynamic viscosity [53] and tend to be viscoelastic [54,55], which behave like polymers as discussed in the next section.…”

Section: The Effect Of Surfactants On the Physical Properties (Surfacmentioning

confidence: 98%

“…Addition of polymers in water primarily increases the solution viscosity, which tends to increase with increasing the concentration of aqueous polymeric additive solutions as well as the molecular weight of the polymers. The polymeric additive solutions often display a shear-rate depended shear-thinning rehology [54] with the exception of some surface-active polymers (or polymeric surfactants) such as hydroxyethyl cellulose (HEC) and polyethylene oxide (PEO), most aqueous polymeric additive solutions do not show any significant change in surface tension [42,52,57]. The viscosity of aqueous polymeric additive solutions, however, can influence the surface tension measurement considerably, especially at higher viscosities and bubble frequencies.…”

Section: The Effect Of Polymeric Additives On the Physical Propertiesmentioning

confidence: 99%

“…Variation of the measured dynamic surface tension versus concentration for HEC-QP300 presented by Zhang[45] and for HEC250HHR presented by Hu et al[52].…”

mentioning

confidence: 99%

See 3 more Smart Citations

Boiling phenomena with surfactants and polymeric additives: A state-of-the-art review

Cheng

Mewes

Luke

2007

International Journal of Heat and Mass Transfer

172

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Section: The Effect Of Polymeric Additives On the Physical Propertiesmentioning

confidence: 90%

Section: The Effect Of Surfactants On the Physical Properties (Surfacmentioning

confidence: 98%

Section: The Effect Of Polymeric Additives On the Physical Propertiesmentioning

confidence: 99%

“…Variation of the measured dynamic surface tension versus concentration for HEC-QP300 presented by Zhang[45] and for HEC250HHR presented by Hu et al[52].…”

mentioning

confidence: 99%

See 2 more Smart Citations

Boiling phenomena with surfactants and polymeric additives: A state-of-the-art review

Cheng

Mewes

Luke

2007

International Journal of Heat and Mass Transfer

172

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“…An important difficulty is to determine the interfacial tension σ between the two phases. In the literature, the corn oil surface tension is reported to be σ oil ≈ 33.5 mN/m [35] and for the polyacrylamide solution σ PAAM ≈ 75 mN/m [36]. At the first order, Antonoff's rule gives the interfacial tension between the two phases σ = |σ PAAM − σ oil | ≈ 41.5 mN/m.…”

Section: Tail Appearance and Breakupmentioning

confidence: 99%

Encapsulation of Droplets Using Cusp Formation behind a Drop Rising in a Non-Newtonian Fluid

Poryles

Zenit

2018

Fluids

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Abstract:The rising of a Newtonian oil drop in a non-Newtonian viscous solution is studied experimentally. In this case, the shape of the ascending drop is strongly affected by the viscoelastic and shear-thinning properties of the surrounding liquid. We found that the so-called velocity discontinuity phenomena is observed for drops larger than a certain critical size. Beyond the critical velocity, the formation of a long tail is observed, from which small droplets are continuously emitted. We determined that the fragmentation of the tail results mainly from the effect of capillary effects. We explore the idea of using this configuration as a new encapsulation technique, where the size and frequency of droplets are directly related to the volume of the main rising drop, for the particular pair of fluids used. These experimental results could lead to other investigations, which could help to predict the droplet formation process by tuning the two fluids' properties, and adjusting only the volume of the main drop.

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An experimental investigation of nucleate pool boiling in aqueous solutions of a polymer

2011

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in Wiley Online Library (wileyonlinelibrary.com).Nucleate boiling characteristics of aqueous solutions of hydroxyl ethyl cellulose (HEC QP-300; M $ 600 kg/mol) in different concentrations (1.0 Â 10À9 mol/cc) are reported. These are viscous non-Newtonian, shear-thinning solutions that also display interfacial tension relaxation, which has both a concentrationdependent and temporal behavior; surface wetting increases as well, as measured by the reduction of contact angle. The measured pool boiling heat transfer from an electrically heated horizontal cylinder in C ¼ 1.0 Â 10 À9 mol/cc aqueous solution is found to be enhanced by $20% over the entire heat flux range (4.0 \ q 00 w \ 200 kW/m 2 ). In higher concentration solutions, however, heat transfer degrades at low heat fluxes (incipience and partial boiling) with subsequent enhancement ($45% maximum) at high heat fluxes or in the fully-developed nucleate boiling regime. This anomalous boiling behavior in the two regimes, characterized by respectively different ebullience signatures, is shown to be scaled with changes in the liquid-solid interface wetting, vapor-liquid interfacial tension, and shear-thinning viscosity of the polymeric solutions.

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Surface tension measurement of aqueous polymer solutions

Cited by 44 publications

References 3 publications

Boiling phenomena with surfactants and polymeric additives: A state-of-the-art review

Boiling phenomena with surfactants and polymeric additives: A state-of-the-art review

Encapsulation of Droplets Using Cusp Formation behind a Drop Rising in a Non-Newtonian Fluid

An experimental investigation of nucleate pool boiling in aqueous solutions of a polymer

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