Hydrodynamics of CNT dispersion in high shear dispersion mixers

Young Min Park; Dong Hyun Lee; Wook Ryol Hwang; Sang Bok Lee; Seung-Il Jung

Korea-Australia Rheology Journal, Vol.26, No.4, 347-353, November, 2014

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Hydrodynamics of CNT dispersion in high shear dispersion mixers

Young Min Park, Dong Hyun Lee, Wook Ryol Hwang^†, Sang Bok Lee¹, and Seung-Il Jung²

School of Mechanical Engineering, Research Center for Aircraft Parts Technology, Gyeongsang National University, Jinju 660-701, Korea
¹Korea Institute of Materials Science, Changwon 641-831, Korea
²Future Industry R&D Center, DH Holdings, Gwangmyeong 523-051, Korea

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In this work, we investigate the carbon nanotube (CNT) fragmentation mechanism and dispersion in high shear homogenizers as a plausible dispersion technique, correlating with device geometries and processing conditions, for mass production of CNT-aluminum composites for automobile industries. A CNT dispersion model has been established in a turbulent flow regime and an experimental method in characterizing the critical yield stress of CNT flocs are presented. Considering CNT dispersion in ethanol as a model system, we tested two different geometries of high shear mixers . blade-stirrer type and rotor-stator type homogenizers . and reported the particle size distributions in time and the comparison has been made with the modeling approach and partly with the computational results.

Keywords:turbulent dispersion;CNT dispersion;homogenizer;CNT/aluminum composites;CFD

[References]

Brandes EA, Brook GB, Smithells Metals Reference Book (7th ed.), Butterworth-Heinemann, Boston, MA (1992)
Calabrese RV, Francis MK, Mishra VP, Phongikaroon S, Measurement and Analysis of Drop Size in a Batch Rotor-Stator Mixier, in Proceedings of 10th European Mixing Conference on Mixing, edited by van den Akker and Derksen, Elsevier (2000)
Choi JH, Nam YW, Hong JS, Korea-Aust. Rheol. J., 25(1), 1 (2013)
Davis HE, Troxell GE, Hauck GFW, The Testing of Engineering Materials (4th ed.), McGraw-Hill, New York, NY (1983)
Huang YY, Terentjev EM, Polymers, 4, 275 (2012)
Kamiya T, Sasaki H, Toyama Y, Hanyu K, Kaminoyama M, Nishi K, Misumi R, J. Chem. Eng. Jpn., 43(4), 355 (2010)
Kusters KA, The Influence of Turbulence on Aggregation of Small Particles in Agitated Vessels, Ph.D Thesis, Eindhoven University of Technology (1991)
Naidich JV, Prog. Surf. Membr. Sci., 14, 353 (1981)
Paul EL, Atiemo-Obeng VA, Kresta SM, Handbook of Industrial Mixing: Science and Practice, pp. 710-742, Wiley, Hoboken, NJ (2003)
Start PR, Hudson SD, Hobble EK, Migler KB, J. Colloid Interface Sci., 297(2), 631 (2006)
Utomo AT, Baker M, Pacek AW, Chem. Eng. Res. Des., 86(12A), 1397 (2008)

[Referenced By]

[1] Brandes EA, Brook GB, Smithells Metals Reference Book (7th ed.), Butterworth-Heinemann, Boston, MA (1992)

[2] Calabrese RV, Francis MK, Mishra VP, Phongikaroon S, Measurement and Analysis of Drop Size in a Batch Rotor-Stator Mixier, in Proceedings of 10th European Mixing Conference on Mixing, edited by van den Akker and Derksen, Elsevier (2000)

[3] Choi JH, Nam YW, Hong JS, Korea-Aust. Rheol. J., 25(1), 1 (2013)

[4] Davis HE, Troxell GE, Hauck GFW, The Testing of Engineering Materials (4th ed.), McGraw-Hill, New York, NY (1983)

[5] Huang YY, Terentjev EM, Polymers, 4, 275 (2012)

[6] Kamiya T, Sasaki H, Toyama Y, Hanyu K, Kaminoyama M, Nishi K, Misumi R, J. Chem. Eng. Jpn., 43(4), 355 (2010)

[7] Kusters KA, The Influence of Turbulence on Aggregation of Small Particles in Agitated Vessels, Ph.D Thesis, Eindhoven University of Technology (1991)

[8] Naidich JV, Prog. Surf. Membr. Sci., 14, 353 (1981)

[9] Paul EL, Atiemo-Obeng VA, Kresta SM, Handbook of Industrial Mixing: Science and Practice, pp. 710-742, Wiley, Hoboken, NJ (2003)

[10] Start PR, Hudson SD, Hobble EK, Migler KB, J. Colloid Interface Sci., 297(2), 631 (2006)

[11] Utomo AT, Baker M, Pacek AW, Chem. Eng. Res. Des., 86(12A), 1397 (2008)