Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Colloidal Stability of Polymer Colloids with Variable Surface Charge.

Puertas1, de las Nieves FJ

  • 1Department of Applied Physics, University of Almería, Almería, 04120, Spain

Journal of Colloid and Interface Science
|July 28, 1999
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Adsorption and Desorption of Triton X-100 in Polystyrene Particles with Different Functionality.

Journal of colloid and interface science·2000
Same author

Adsorption and Desorption of Triton X-100 in Polystyrene Particles with Different Functionality.

Journal of colloid and interface science·2000
Same author

Titanium Dioxide/Electrolyte Solution Interface: Electron Transfer Phenomena.

Journal of colloid and interface science·2000
Same author

Characterization of Immunoglobulin G Bound to Latex Particles Using Surface Plasmon Resonance and Electrophoretic Mobility.

Journal of colloid and interface science·1998

This study investigated colloidal stability in latex particles by analyzing surface charge and electrolyte concentration. The Hamaker constant unexpectedly decreased with surface charge, suggesting co-ion adsorption as a likely explanation.

Area of Science:

  • Colloid and Surface Science
  • Physical Chemistry
  • Materials Science

Background:

  • Colloidal stability is crucial for many applications, including paints, inks, and pharmaceuticals.
  • The Derjaguin-Landau-Verwey-Overbeek (DLVO) theory is a fundamental model for understanding colloidal interactions.
  • Latex particles with variable surface charge groups present a complex system for stability studies.

Purpose of the Study:

  • To investigate the colloidal stability of latex particles with variable surface charge groups.
  • To determine the diffuse potential and Hamaker constant using DLVO theory across a range of pH.
  • To explain the observed paradoxical trend of decreasing Hamaker constant with decreasing surface charge.

Main Methods:

  • Experimental determination of log W versus log[electrolyte] plots for two latex systems.

Related Experiment Videos

  • Fitting experimental data using the DLVO theory to extract physical parameters.
  • Evaluation of different theoretical models for electric repulsive potential.

    • Main Results:

    • Diffuse potential decreased with decreasing surface charge, as expected.
    • Hamaker constant unexpectedly decreased with decreasing surface charge, contradicting theoretical assumptions.
    • Existing theories for electric repulsive potential failed to explain the observed trend.

    Conclusions:

    • Co-ion adsorption and the hairy layer model were proposed as potential explanations for the observed Hamaker constant behavior.
    • Co-ion adsorption is considered the more probable explanation based on thermodynamic considerations.
    • Further research is needed to fully elucidate the factors influencing Hamaker constant in charged colloidal systems.