Chapter 10. Colloids and Colloidal Stability

  1. Drew Myers

Published Online: 28 APR 2002

DOI: 10.1002/0471234990.ch10

Book Title

Surfaces, Interfaces, and Colloids: Principles and Applications, Second Edition

Surfaces, Interfaces, and Colloids: Principles and Applications, Second Edition

Additional Information

How to Cite

Myers, D. (2002) Colloids and Colloidal Stability, in Surfaces, Interfaces, and Colloids: Principles and Applications, Second Edition, John Wiley & Sons, Inc., New York, USA. doi: 10.1002/0471234990.ch10

Publication History

  1. Published Online: 28 APR 2002

ISBN Information

Print ISBN: 9780471330608

Online ISBN: 9780471234999

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CHAPTER TOOLS

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Keywords:

  • colloidal stability;
  • colloid structure;
  • aerosols;
  • emulsions;
  • foams;
  • sols;
  • coagulation;
  • flocculation;
  • creaming;
  • commutation;
  • dispersion;
  • condensation colloids;
  • thermodynamics of colloid behavior;
  • mechanisms of stabilization;
  • Hamaker constant;
  • interparticle forces;
  • attractive interactions;
  • charged surfaces and the electrical double layer;
  • stearic or enthalpic stabilization;
  • polymer adsorption;
  • solvent effects;
  • depletion flocculation;
  • coagulation kinetics;
  • slow coagulation;
  • critical coagulation concentration;
  • DLVO theory;
  • reversible flocculation;
  • secondary minimum

Summary

Chapter 10 begins with a discussion of the importance of colloidal systems and a “working definition” of such systems. The chapter goes on to define various systems including aerosols, foams, sols, emulsions, gels, etc. The size range of components generally considered to fall into the colloidal range is defined along with several terms commonly encountered. The discussion covers arious methods of colloid formation before getting into specific aspects of colloidal characteristics. Colloidal stability is defined as both thermodynamic and practical matters, leading into the presentation of various stabilization mechanisms and their theoretical functional bases, including the interactions presented in Chapters 4 and 5. Also introduced are the concepts of enthalpic or stearic stabilization, polymer adsorption at interfaces, flocculation, and coagulation kinetics. The Deryagin–Landau–Verwey–Overbeek (DLVO) theory of colloidal stability is presented along with the concept of the complete energy curve to describe the stability of a system.

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