Model for the hydrodynamic dispersion of agglomerates incorporating thermoresponsive additives

Luciana Bava, Donald L. Feke, Ica Manas-Zloczower, Stuart J. Rowan

Research output: Contribution to journalArticle

Abstract

A phenomenological model for the hydrodynamic dispersion of silica agglomerates modifi ed with a thermoresponsive hydrogel (poly- N -isopropylacrylamide, PNIPAM) is presented. The model well describes experimental observations of the dependence of the dispersion behavior on the presence of additives (water and PNIPAM hydrogels) and applied hydrodynamic stress. Most importantly, the thermosensitivity of the dispersion process is captured by characterizing the agglomerate structure and cohesive force at two different temperatures (above and below the hydrogel transition temperature). The transition in dispersion mechanism between rupture-like and erosion-like regimes with system temperature can also be accommodated within the model.

Original languageEnglish
Pages (from-to)5-12
Number of pages8
JournalJournal of Polymer Engineering
Volume31
Issue number1
DOIs
Publication statusPublished - 2011 Apr
Externally publishedYes

Keywords

  • Agglomerate dispersion
  • Kinetic model
  • Thermoresponsive additive

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Chemical Engineering(all)

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