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Colloid and Polymer Science

, Volume 269, Issue 1, pp 36–42 | Cite as

Transient adsorption of a tri(ethyleneglycol) polyacrylate on a plasmapheresis membrane

  • F. Yan
  • P. Déjardin
  • P. Gramain
  • A. Schmitt
Polymer Science

Abstract

We study the adsorption of polyacrylate of tri(ethyleneglycol) in water on a plasmapheresis membrane, whose main constituent is a copolymer of acrylonitrile and methylmethacrylate. The amount of adsorbed polymer has a strong dependence on pH. Adsorbance is high at low pH and very low at high pH, while in the intermediate range the interfacial concentration Γ is not a monotonic function of the solution concentrationC. Viscosimetry andUV adsorbance measurements in solution suggest the existence of plurimolecular structures, aggregates, or micelles. We propose a kinetic model, where these latter objects act as detergents at highC and, therefore, contribute to decreasing the interfacial concentration Γ when increasingC.

Key words

Polymer adsorption tri(ethyleneglycol) polyacrylate plasmapheresis membrane 

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Copyright information

© Steinkopff-Verlag 1991

Authors and Affiliations

  • F. Yan
    • 1
  • P. Déjardin
    • 1
  • P. Gramain
    • 1
  • A. Schmitt
    • 1
  1. 1.Institut Charles Sadron (CRM-EAHP)CNRS-ULP StrasbourgStrasbourg CedexFrance

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