Poly(acrylic acid) microgels (carbopol® 934)/surfactant interactions in aqueous media Part II: Ionic surfactants

Barreiro-Iglesias, Rafael

doi:10.1016/s0378-5173(03)00182-0

Cited by 39 publications

(12 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Contrarily to what is predicted for Saffman-Taylor instability where the combination of viscous polymer and surfactant is expected to promote the oil displacement by both increasing the viscous forces and reducing the capillary forces, specific rheological features (shear-thinning fluid, surface tension anisotropy) modify this behavior. We thus pointed out that if surfactant concentration decreases logically the interfacial tension, the effect on Ca * is enhanced to some extent by a reduction of viscosity due to an increase in the ionic strength of the medium 40 .…”

Section: Discussionmentioning

confidence: 91%

See 1 more Smart Citation

Impact of surfactant addition on non-Newtonian fluid behavior during viscous fingering in Hele-Shaw cell

et al. 2020

View full text Add to dashboard Cite

We present an experimental study of viscous fingering caused by the displacement of an oil phase by non-Newtonian fluids such as Carbopol ® 940 with and without surfactant (SDS) addition in a radial Hele-Shaw cell. When polymer solutions are injected, a variety of fingering patterns as a function of flow rate are observed, which differ from the classical Saffman-Taylor (ST) instability. We have shown that if surfactant concentration locally decreases the interfacial tension, it also leads to a reduction of viscosity and hence results in an increasing impact on capillary number. We found that surfactant-polymer solutions have wider fingers with increasing flow rates in contrast with Newtonian solutions. Our study also revealed that the relative finger width of both non-Newtonian experiments with and without surfactant converge asymptotically to the same value. We think that this phenomenon is caused by the decrease of surfactant concentration in the vicinity of the tip as the finger is growing so that the shear-thinning features of polymer prevail at long time. The flow rate dependency of surfactant solution behavior is driven by the Newtonian or non-Newtonian nature of the fluid.Surfactant-polymer solutions have wider fingers with increasing flow rates in contrast with surfactant-Newtonian solutions. The asymptotic behavior tends to smooth out the surfactant effect on fingering pattern. For both non-Newtonian fluids, the relative finger width converges practically towards the same value that is 0.4 at large Ca * . We assume that this phenomenon is caused by the decrease of surfactant concentration in the vicinity of the tip as the finger is growing.Ultimately, since the Hele Shaw cell can be seen as an idealized model of fracture, a more significant insight into the behavior of surfactant-polymer solutions in fractures should be obtained from this work.

show abstract

Section: Discussionmentioning

confidence: 91%

“…Note that for higher concentrations (>0.1% SDS), an opposite effect occurs: the increase of osmotic pressure causes the matrix swelling and thus viscosity increases. Above the SDS binding concentration (0.6%), viscosity decreases again because of the presence of free micelles 40 . As can be seen in Fig.…”

Section: A Rheological Properties Of Fluids Usedmentioning

confidence: 99%

Impact of surfactant addition on non-Newtonian fluid behavior during viscous fingering in Hele-Shaw cell

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Considering the fact that Barreiro-Iglesisas et al [18,19] pointed out the physicochemical changes of Carbopol Ò 934 in the presence of different types of surfactants, the main purpose of this research was to get a deeper insight into the possible mechanism of interactions between widely used polymers, such as Carbopol Ò 940, and different surface-active molecules. Tween Ò 80 and SDS were used as nonionic and anionic surfactants, respectively.…”

Section: Introductionmentioning

confidence: 99%

Insight into the Interaction Between Carbopol^® 940 and Ionic/Nonionic Surfactant

Milanović

Krstonošić

Dokić

et al. 2015

J Surfact & Detergents

View full text Add to dashboard Cite

Mixtures of a cross-linked polyacrylic acid (Carbopol Ò 940) and two types of surfactants, namely anionic sodium dodecylsulfate (SDS) and nonionic Tween Ò 80, were investigated by viscometry, conductometry, tensiometry, spectrophotometry, fluorimetry and scanning electron microscopy (SEM). The addition of nonionic surfactant decreased the reduced viscosity and the transmittance of the Carbopol Ò polymer aqueous solutions. Furthermore, the interaction between Carbopol Ò 940 and SDS was characterized by two significant concentration values: the critical aggregation concentration of SDS was particularly independent of Carbopol Ò polymer concentration while the polymer saturation point of both surfactants increased with the increase in polymer content. The values of critical aggregation concentration and polymer saturation point obtained using various techniques confirmed the occurrence of Carbopol Ò polymer-surfactant associations. The effect of different SDS and Tween Ò 80 concentrations on the conformation of Carbopol Ò 940 in aqueous solution could be explained through hydrophobic association between surfactant micelles and Carbopol Ò polymer tails and through hydrogen bonding in the case of Tween Ò 80. Additionally, the surfactant-induced structural changes were confirmed in Carbopol Ò 940-SDS and Carbopol Ò 940-Tween Ò 80 aqueous solutions by SEM measurements.

show abstract

“…The presence of surfactants may change the behavior of a polymer in solution. This can be exemplified by surfactant-induced thickening (Antunes, Marques, Miguel, & Lindman, 2009;Barreiro-Iglesias, AlvarezLorenzo, & Concheiro, 2003b;Cabane & Duplessix, 1982;Franç ois, Dayantis, & Sabbadin, 1985;Goddard & Ananthapadmanabhan, 1993;Holmberg, Jönsson, Kronberg, & Lindman, 2003;Lange, 1971;Lee, 1999), surfactant-induced swelling (Barreiro-Iglesias et al, 2003b) or compaction (Dias et al, 2004), surfactant-induced phase separation (Goddard & Ananthapadmanabhan, 1993;Holmberg et al, 2003), among other effects.…”

Section: Introductionmentioning

confidence: 99%

New insights on the interaction between hydroxypropylmethyl cellulose and sodium dodecyl sulfate

Silva

Antunes

Sousa

et al. 2011

Carbohydrate Polymers

View full text Add to dashboard Cite

Poly(acrylic acid) microgels (carbopol® 934)/surfactant interactions in aqueous media Part II: Ionic surfactants

Cited by 39 publications

References 63 publications

Impact of surfactant addition on non-Newtonian fluid behavior during viscous fingering in Hele-Shaw cell

Impact of surfactant addition on non-Newtonian fluid behavior during viscous fingering in Hele-Shaw cell

Insight into the Interaction Between Carbopol^® 940 and Ionic/Nonionic Surfactant

New insights on the interaction between hydroxypropylmethyl cellulose and sodium dodecyl sulfate

Contact Info

Product

Resources

About

Poly(acrylic acid) microgels (carbopol® 934)/surfactant interactions in aqueous media Part II: Ionic surfactants

Cited by 39 publications

References 63 publications

Impact of surfactant addition on non-Newtonian fluid behavior during viscous fingering in Hele-Shaw cell

Impact of surfactant addition on non-Newtonian fluid behavior during viscous fingering in Hele-Shaw cell

Insight into the Interaction Between Carbopol® 940 and Ionic/Nonionic Surfactant

New insights on the interaction between hydroxypropylmethyl cellulose and sodium dodecyl sulfate

Contact Info

Product

Resources

About

Insight into the Interaction Between Carbopol^® 940 and Ionic/Nonionic Surfactant