Static and dynamic electric birefringence in model colloidal dispersions of intrinsically anisotropic particles

Roberto Piazza, Vittorio Degiorgio, Mario Ettore Giardini, Francesco Mantegazza

Research output: Chapter in Book/Report/Conference proceedingChapter

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.
LanguageEnglish
Title of host publicationStructure and Dynamics of Strongly Interacting Colloids and Supramolecular Aggregates in Solution
EditorsSow-Hsin Chen, John S. Huang, Piero Tartaglia
PublisherSpringer
Pages557-570
Number of pages14
ISBN (Print)9789401051224
DOIs
Publication statusPublished - 1992

Publication series

NameNATO ASI Series
PublisherSpringer
Volume369
ISSN (Print)1389-2185

Fingerprint

Birefringence
Dispersions
birefringence
Fluorocarbon Polymers
Optical anisotropy
polytetrafluoroethylene
Charge distribution
Dipole moment
Polytetrafluoroethylene
virial coefficients
Colloids
Surface charge
Ionic strength
Polytetrafluoroethylenes
charge distribution
colloids
Volume fraction
Suspensions
copolymers
dipole moments

Keywords

  • electric birefringence measurements
  • model solutions
  • fluorinated polymer colloids
  • electric polarization
  • colloidal systems
  • high intrinsic optical anisotropy
  • static and dynamic
  • electric birefringence
  • model colloidal dispersions
  • anisotropic particles

Cite this

Piazza, R., Degiorgio, V., Giardini, M. E., & Mantegazza, F. (1992). Static and dynamic electric birefringence in model colloidal dispersions of intrinsically anisotropic particles. In S-H. Chen, J. S. Huang, & P. Tartaglia (Eds.), Structure and Dynamics of Strongly Interacting Colloids and Supramolecular Aggregates in Solution (pp. 557-570). (NATO ASI Series; Vol. 369). Springer. https://doi.org/10.1007/978-94-011-2540-6_27
Piazza, Roberto ; Degiorgio, Vittorio ; Giardini, Mario Ettore ; Mantegazza, Francesco. / Static and dynamic electric birefringence in model colloidal dispersions of intrinsically anisotropic particles. Structure and Dynamics of Strongly Interacting Colloids and Supramolecular Aggregates in Solution. editor / Sow-Hsin Chen ; John S. Huang ; Piero Tartaglia. Springer, 1992. pp. 557-570 (NATO ASI Series).
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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.",
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author = "Roberto Piazza and Vittorio Degiorgio and Giardini, {Mario Ettore} and Francesco Mantegazza",
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Piazza, R, Degiorgio, V, Giardini, ME & Mantegazza, F 1992, Static and dynamic electric birefringence in model colloidal dispersions of intrinsically anisotropic particles. in S-H Chen, JS Huang & P Tartaglia (eds), Structure and Dynamics of Strongly Interacting Colloids and Supramolecular Aggregates in Solution. NATO ASI Series, vol. 369, Springer, pp. 557-570. https://doi.org/10.1007/978-94-011-2540-6_27

Static and dynamic electric birefringence in model colloidal dispersions of intrinsically anisotropic particles. / Piazza, Roberto; Degiorgio, Vittorio; Giardini, Mario Ettore; Mantegazza, Francesco.

Structure and Dynamics of Strongly Interacting Colloids and Supramolecular Aggregates in Solution. ed. / Sow-Hsin Chen; John S. Huang; Piero Tartaglia. Springer, 1992. p. 557-570 (NATO ASI Series; Vol. 369).

Research output: Chapter in Book/Report/Conference proceedingChapter

TY - CHAP

T1 - Static and dynamic electric birefringence in model colloidal dispersions of intrinsically anisotropic particles

AU - Piazza, Roberto

AU - Degiorgio, Vittorio

AU - Giardini, Mario Ettore

AU - Mantegazza, Francesco

PY - 1992

Y1 - 1992

N2 - 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.

AB - 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.

KW - electric birefringence measurements

KW - model solutions

KW - fluorinated polymer colloids

KW - electric polarization

KW - colloidal systems

KW - high intrinsic optical anisotropy

KW - static and dynamic

KW - electric birefringence

KW - model colloidal dispersions

KW - anisotropic particles

UR - http://link.springer.com/chapter/10.1007%2F978-94-011-2540-6_27

U2 - 10.1007/978-94-011-2540-6_27

DO - 10.1007/978-94-011-2540-6_27

M3 - Chapter

SN - 9789401051224

T3 - NATO ASI Series

SP - 557

EP - 570

BT - Structure and Dynamics of Strongly Interacting Colloids and Supramolecular Aggregates in Solution

A2 - Chen, Sow-Hsin

A2 - Huang, John S.

A2 - Tartaglia, Piero

PB - Springer

ER -

Piazza R, Degiorgio V, Giardini ME, Mantegazza F. Static and dynamic electric birefringence in model colloidal dispersions of intrinsically anisotropic particles. In Chen S-H, Huang JS, Tartaglia P, editors, Structure and Dynamics of Strongly Interacting Colloids and Supramolecular Aggregates in Solution. Springer. 1992. p. 557-570. (NATO ASI Series). https://doi.org/10.1007/978-94-011-2540-6_27