Rheology of Decamethylceclopentasiloxane (cyclomethicone) W/O Emulsion System

Min Hyung Choi; Sora Jeong; Sang In Nam; Sang Eun Shim; Yoon Ho Chang

Macromolecular Research, Vol.17, No.12, 943-949, December, 2009

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Rheology of Decamethylceclopentasiloxane (cyclomethicone) W/O Emulsion System

Min Hyung Choi, Sora Jeong, Sang In Nam, Sang Eun Shim , and Yoon Ho Chang^†

Department of Chemical Engineering, Inha University, Incheon 402-751, Korea

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A highly dispersed W/O emulsion of silicone oil (cyclomethicone)/water system was prepared with a nonionic surfactant. The surface and interfacial tension between the oil and water were characterized in terms of the droplet size distribution and viscosity change of the emulsion. When the dispersed phase concentration was relatively high, the viscosity of the emulsion was rapidly increased and the droplet size of the emulsion was decreased. The rheological behavior of the emulsion system showed non-Newtonian and shear thinning phenomena depending upon the content of the dispersed phase. The droplet size of the emulsion was decreased with increasing surfactant content and water concentration. The relative viscosity of the emulsion was better predicted with the Choi-Schowalter model than with the Taylor model. The value of the complex modulus increased with increasing surfactant concentration. The linear viscoelastic region was expanded with a dispersed phase concentration. According to the change in the viscosity, the behavior was classified into three distinct regions: [I] linear viscoelastic, [II] partially viscoelastic, and [III] viscous. The creep/recovery behaviors in each region were characterized.

Keywords:rheology;silicone;W/O emulsion;surfactant;shear thinning

[References]

Clarson SJ, Science and technology of silicones and silicone-modified materials, Oxford University Press, London (2007)
Lee SM, Shim DC, Lee JW, Macromol. Res., 16(1), 6 (2008)
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Tadros TF, Colloid Surf. A, 91, 39 (1994)
Zoldesi CI, Steegstra P, Imhof A, J. Colloid Interface Sci., 308(1), 121 (2007)
Neumann B, Vincent B, Krustev R, Muller HJ, Langmuir, 20(11), 4336 (2004)
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Patole AS, Patole SP, Song MH, Yoon YJ, Kim J, Kim TH, Elastom. Compos., 44, 34 (2009)
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Taylor GI, Proc. R. Soc. A, 138, 41 (1932)
Choi SJ, Schowalter WR, Phys. Fluids, 18, 420 (1975)

[Referenced By]

[Related Articles]

[1] Clarson SJ, Science and technology of silicones and silicone-modified materials, Oxford University Press, London (2007)

[2] Lee SM, Shim DC, Lee JW, Macromol. Res., 16(1), 6 (2008)

[3] Barnes HA, Colloid Surf. A, 91, 89 (1994)

[4] Tadros TF, Colloid Surf. A, 91, 39 (1994)

[5] Zoldesi CI, Steegstra P, Imhof A, J. Colloid Interface Sci., 308(1), 121 (2007)

[6] Neumann B, Vincent B, Krustev R, Muller HJ, Langmuir, 20(11), 4336 (2004)

[7] Wahl RU, Nicholson JR, Kerschner JL, Silicones in personal care applications, ACS Symposium Series, New York (2007)

[8] Kim DY, Shin WS, Macromol. Res., 17(2), 128 (2009)

[9] Patole AS, Patole SP, Song MH, Yoon YJ, Kim J, Kim TH, Elastom. Compos., 44, 34 (2009)

[10] Mill M, Silicone surfactants, Marcel Dekker, New York (1999)

[11] Peng ZL, Wu Q, Wang YL, Yang ST, J. Surf. Deterg., 7, 277 (2004)

[12] Hatschek E, Foundation of colloid chemistry, London (1925)

[13] Dean RB, Modern colloid, Van Nostrand Reinhold, New York (1948)

[14] Schulman JH, Stoeckenius W, Prince LM, J. Phys. Chem., 63, 1977 (1959)

[15] Pal R, in Encyclopedia of Emulsion Technology, Becher P, Ed., Dekker, New York, 1996, Vol. 4.

[16] Robert J, Stokes D, Fennell E, Fundamentals of interfacial engineering, Wiley-VCh, Inc., U.S.A, 1997, p 212.

[17] Chen Y, Conrad H, ASME FED., 249, 105 (1999)

[18] Shinoda K, Saito H, Arai H, J. Colloid Interface Sci., 35, 624 (1971)

[19] Eccleston GM, J. Soc. Cosmet. Chem., 41, 1 (1990)

[20] Hyun JC, Rheology and Its Applications, The Korean Society of Rheology, Korea (2001)

[21] Taylor GI, Proc. R. Soc. A, 138, 41 (1932)

[22] Choi SJ, Schowalter WR, Phys. Fluids, 18, 420 (1975)