Obtaining the Osmotic Pressure of Electrostatically Stabilized Colloidal Dispersions from Frontal Ultrafiltration Experiments

A new method for determining the osmotic pressure of electrostatically stabilized colloidal particles from frontal ultrafiltration experiments has been developed

W. Richard Bowen

2002

Scholarcy highlights

  • A new method for determining the osmotic pressure of electrostatically stabilized colloidal particles from frontal ultrafiltration experiments has been developed
  • The method is based on a reverse calculation utilizing a previously developed analysis of frontal ultrafiltration
  • The method has the following advantages over conventional membrane osmometer measurements: only very simple apparatus is required, results are obtained quickly, only small sample quantities are required, and only dilute initial samples are needed, as the ultrafiltration process creates a concentrated solution at the membrane, making sample preparation a simple task
  • A comparison of the osmotic pressure determined by this new method with previously measured osmotic pressure data shows excellent agreement
  • The approach demonstrates how analysis of process data may provide quantitative information on the interactions of concentrated colloidal systems

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