Abstract
Electric birefringence measurements in model solutions of fluorinated polymer colloids provide a sensitive way to understand the mechanisms of electric polarization in colloidal systems, thanks to the high intrinsic optical anisotropy of these materials. We present here static and dynamic measurements in suspensions of charged PTFE (polytetrafluoroethylene) rods and PFA (alkoxyvinylether -tetrafluoroethylene copolymer ) spheres. In particular we show that the contribution of counterion clouds is strongly related to interparticle interaction effects and is almost negligible in the dilute limit, that the volume fraction dependence of the second virial coefficient of the Kerr constant seems to scale with the inverse of the ionic strength and that the experimental evidence of an apparent permanent dipole moment may be explained in terms of a fluctuational model of surface charge distribution on the colloidal particle.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
O’Konsky, C. T. (ed) (1976) ’Molecular Electro-Optics’, Marcel Dekker, N.Y.
Bellini,T., Piazza, R, Sozzi ,C. and Degiorgio, V. (1988) ’Electric birefringence of a dispersion of electrically charged anisotropic particles’, Europhysics Letters, 7, 561–569.
Piazza, R., Stavans, J., Bellini,T., Lenti, D., Visca, M. and Degiorgio, V. (1990) ’Light scattering experiment on anisotropic spherical particles’, Progress in Colloid & Polymer Science,8l, 89–94 .
Degiorgio,V., Piazza,R., Corti, M. and Stavans, J. (1991) ’Dynamic Light scattering study of concentrated dispersion of anisotropic spherical particles’, Journal of the Chemical Society Faraday Transactions , 87, 431–434
Tinoco, I., Yamaoka, K. (1959) ’The reversing pulse technique in electric birefringence’, Journal of Physical Chemistry, 63, 423–427
O’Konski, C.T. (1960) ’Electric Properties of Macromolecules. V: ’Theory of ionic polarization in Polyelectrolytes’, Journal of Physical Chemistry, 64, 605
Fixman, M. (1980) ’Charged macromolecules in external fields I : the sphere’, Journal of Chemical Physics, 72, 5177–5195
Bellini, T. (1989) ’ Statica e dinamica della birifrangenza elettrica in liquidi complessi’,Tesi di Dottorato, Università di Pavia
Vogel, E. and Pauly, H. (1988) ’Dynamic dipole polarizability of a dielectric sphere in an electrolyte’, Journal of Chemical Physics, 89, 3823–3829
Belloni,L. (1982), Thesis Universitè Paris VI.
Kirkwood, J.G., Shumaker, J.D. (1952) ’ The influence of dipole moment fluctuations on the dielectric increment of protein in solutions’, Proceedings of the National Academy of Sciences, 38, 855–862
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1992 Springer Science+Business Media Dordrecht
About this chapter
Cite this chapter
Piazza, R., Degiorgio, V., Giardini, M., Mantegazza, F. (1992). Static and Dynamic Electric Birefringence in Model Colloidal Dispersions of Intrinsically Anisotropic Particles. In: Chen, SH., Huang, J.S., Tartaglia, P. (eds) Structure and Dynamics of Strongly Interacting Colloids and Supramolecular Aggregates in Solution. NATO ASI Series, vol 369. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2540-6_27
Download citation
DOI: https://doi.org/10.1007/978-94-011-2540-6_27
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-5122-4
Online ISBN: 978-94-011-2540-6
eBook Packages: Springer Book Archive