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Charged Gels and Membranes

Part I

  • Eric Sélégny
  • George Boyd
  • Harry P. Gregor

Part of the Charged and Reactive Polymers book series (CHRP, volume 3)

Table of contents

  1. Front Matter
    Pages I-XXIII
  2. Opening Lectures

  3. Equilibria

  4. Irreversible Thermodynamics

    1. Front Matter
      Pages 121-121
    2. Patrick Meares
      Pages 123-146
    3. Thorvald S. Brun
      Pages 147-155
    4. Russell Paterson, Ronald G. Cameron, Ian S. Burke
      Pages 157-182
    5. A. Sanfeld, A. Sanfeld-Steinchen
      Pages 225-231
  5. Ultra- and Hyper-Filtration Membranes

  6. Back Matter
    Pages 299-305

About this book

Introduction

The series on 'Charged and Reactive Polymers' was set forth in two volumes concern­ ing the fundamentals and applications of polyelectrolytes. A follow-up on 'Charged Gels and Membranes' would therefore seem appropriate, necessitating, however, some explanation for non-specialists. Theories of the most dilute gels originate in that of concentrated polyelectrolytes: the methods and problems are similar in structural, spectroscopic or thermodynamic properties. The borderline can be situated in dialysis conducted with a 'bag' imper­ meable to polyelectrolytes but not to small ions, solutes and water. One may recall Donnan's use of such a system to experiment and discover his famous law of unequal distribution of ions of different charge inside and out. Remark­ ably so, it is the difference in scale which characterizes the difference between poly­ electrolyte solutions and gels and membranes: the colloidal solution of macro­ molecules is heterogeneous only on the microscopic level, whereas the gel-solution system is a macroscopically heterogeneous one. A gel is formed when weak or strong cohesive forces counterbalance the dispersing ones (usually by crosslinking) without inhibiting the penetration of solvent and of small solutes into the polymeric network. The solvophile macromolecules cannot invade the total volume of liquid. As a result of phase-segregation excess solution and gel coexist and interact. The macroscopic swelling depends on gel cross-linking as well as on ionic concentration and type and ion-selectivities are observed.

Keywords

cellulose colloid macromolecule polyelectrolyte polymer

Editors and affiliations

  • Eric Sélégny
    • 1
  • George Boyd
    • 2
  • Harry P. Gregor
    • 3
  1. 1.Université de RouenFrance
  2. 2.University of GeorgiaUSA
  3. 3.Columbia UniversityUSA

Bibliographic information

  • DOI https://doi.org/10.1007/978-94-010-1464-9
  • Copyright Information Springer Science+Business Media B.V. 1976
  • Publisher Name Springer, Dordrecht
  • eBook Packages Springer Book Archive
  • Print ISBN 978-94-010-1466-3
  • Online ISBN 978-94-010-1464-9
  • Buy this book on publisher's site
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