DOI: 10.1063/1.870254. Drop deformation, breakup, and coalescence with compatibilizer

Drop deformation, breakup, and coalescence with compatibilizer

10.1063/1.870254

Crossref journal-article

AIP Publishing

Physics of Fluids (317)

Abstract

The effect of copolymers on the breakup and coalescence of polybutadiene (PB) drops in polydimethylsiloxane (PDMS) is studied using a four-roll mill flow cell. Copolymers are produced at the interface by a reaction between functionalized homopolymers. They reduce the interfacial tension and thus enhance breakup; they also inhibit coalescence of drops. Under the conditions of our experiments, the latter effect is much more significant than the former. For example, the addition of copolymer sufficient to reduce the interfacial tension by only 3% relative to the bare interface value is found to reduce the critical capillary number Cac for coalescence by a factor of 6. The critical capillary number for coalescence in the absence of copolymer is also measured for the first time. It is found to scale with the drop radius a as Cac∼a−0.82±0.03 and with the viscosity ratio λ as Cac∼λ−0.41±0.06.

Bibliography

Hu, Y. T., Pine, D. J., & Leal, L. G. (2000). Drop deformation, breakup, and coalescence with compatibilizer. Physics of Fluids, 12(3), 484â489.

Authors 3

Y. T. Hu (first)
D. J. Pine (additional)
L. Gary Leal (additional)

References 15 Referenced 192

10.1146/annurev.fl.26.010194.000433 / Annu. Rev. Fluid Mech. / Dynamics of drop deformation and breakup in viscous fluids (1994)
10.1002/aic.690430607 / AIChE. J. / Influence of dynamic interfacial properties on droplet breakup in plane hyperbolic flow (1997)
10.1016/0009-2509(93)80015-I / Chem. Eng. Sci. / Tipstreaming of drops in simple shear flows (1993)
10.1016/S0927-7757(96)03972-6 / Colloids Surf., A / Behavior of droplets in simple shear flow in the presence of a protein emulsifier (1997)
10.1017/S002211208600280X / J. Fluid Mech. / A computer-controlled four-roll mill for investigations of particle and drop dynamics in two-dimensional linear shear flows (1986)
10.1017/S0022112086002811 / J. Fluid Mech. / An experimental investigation of drop deformation and breakup in steady, two-dimensional linear flows (1986)
10.1017/S0022112090003226 / J. Fluid Mech. / The effects of surfactants on drop deformation and breakup (1990)
10.1063/1.858790 / Phys. Fluids A / The effect of surfactant on the transient motion of Newtonian drops (1993)
10.1006/jcis.1994.1296 / J. Colloid Interface Sci. / The influence of surfactant on the deformation and breakup of a viscous drop—The effect of surfactant solubility (1994)
10.1063/1.868958 / Phys. Fluids / Marangoni effects on drop deformation in an extensional flow: the role of surfactant physical chemistry. I. Insoluble surfactants (1996)
10.1017/S0022112098004054 / J. Fluid Mech. / Insoluble surfactants on a drop in an extensional flow: A generalization of the stagnated surface limit to deforming interfaces (1999)
{'key': '2024020713503023500_r12', 'first-page': '259', 'article-title': 'The modelling of coalescence processes in fluid liquid dispersions—A review of current understanding', 'volume': '69', 'year': '1991', 'journal-title': 'Trans. Inst. Chem. Eng.'} / Trans. Inst. Chem. Eng. / The modelling of coalescence processes in fluid liquid dispersions—A review of current understanding (1991)
10.1021/ma00051a006 / Macromolecules / Self-diffusion and spin–spin relaxation in cyclic and linear polydimethylsiloxane melts (1992)
10.1063/1.555949 / J. Phys. Chem. Ref. Data / Molecular weight dependence of hydrodynamic and thermodynamic properties for well-defined linear polymers in solution (1994)
10.1122/1.550731 / J. Rheol. / How copolymers promote mixing of immiscible homopolymers (1996)

Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 8:02 a.m.)
Deposited	1 year, 6 months ago (Feb. 7, 2024, 3:32 p.m.)
Indexed	8 hours, 59 minutes ago (Sept. 3, 2025, 7:13 a.m.)
Issued	25 years, 6 months ago (March 1, 2000)
Published	25 years, 6 months ago (March 1, 2000)
Published Print	25 years, 6 months ago (March 1, 2000)

Funders 0

None

BibTeX

@article{Hu_2000, title={Drop deformation, breakup, and coalescence with compatibilizer}, volume={12}, ISSN={1089-7666}, url={http://dx.doi.org/10.1063/1.870254}, DOI={10.1063/1.870254}, number={3}, journal={Physics of Fluids}, publisher={AIP Publishing}, author={Hu, Y. T. and Pine, D. J. and Leal, L. Gary}, year={2000}, month=mar, pages={484–489} }

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