Study on Effects of Polydispersity on the Form Factor and Depletion Interaction in Colloid-Polymer Mixtures with Laser Distribution

✍ Scribed by Massumeh Foroutan; Mohammad A. Jafarizadeh

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 151 KB
• Volume: 13
• Category: Article
• ISSN: 1022-1344
• DOI: 10.1002/mats.200400038

✦ Synopsis

Abstract

Summary: We investigate the influence of the polydispersity of colloidal particles and polymer, respectively, on the form factor and depletion interaction by using the laser distribution for parallel plates immersed in a solution of nonadsorbing polymers. For colloidal particles, we show that the measurement of scattering intensity of a polymer‐colloid mixture can be described qualitatively in terms of the parameters K and M of the laser distribution. The form factor of the monodisperse system varies considerably, but generally stays close to the average value that corresponds to the form factor of polydisperse system. By using the laser distribution in the chain length of polymers, we present the complex polymer segment density of polymer chain between particles with the product‐function approximation comprehensively and accurately. In particular, we find that for small values of parameter M, the change of values of parameter K has no effect on depletion interaction.

Predicted form factor for polydisperse core‐shell particles.

magnified imagePredicted form factor for polydisperse core‐shell particles.