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On the drying kinetics of non-spherical particle-filled polymer films: A numerical study
  • Víctor Gracia,
  • Philip Scharfer,
  • Wilhelm Schabel
Víctor Gracia
Karlsruher Institut für Technologie
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Philip Scharfer
Karlsruhe Institute of Technology
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Wilhelm Schabel
Uiversitty Karlsruhe
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Abstract

During the coating and drying of thin polymer-particle composites, the particle geometry has a big impact on the prediction of concentration profiles in the dry film. In this work, a plate-like geometry is used to evaluate the mass transport of the particles with the aspect ratio as a variable. The experimental determination of the viscosity and sedimentation rates allows to simulate concentration profiles in the wet film while drying. A previous simulation model was automatized to describe the drying of the plate-like particles-polyvinyl alcohol-water material system using COMSOL with the initial concentration, aspect ratio, Péclet number, and Sedimentation number as input parameters. The results are summarized in drying regime maps, which show an increase of the evaporation regime, when the aspect ratio decreases due to lower particle mobility. This shows the importance of the geometry while predicting the particle distribution in the dry film and designing coating and drying processes.

Peer review status:UNDER REVIEW

20 Jan 2021Submitted to AIChE Journal
20 Jan 2021Submission Checks Completed
20 Jan 2021Assigned to Editor
01 Feb 2021Reviewer(s) Assigned
29 Mar 2021Editorial Decision: Revise Major
30 Apr 20211st Revision Received
06 May 2021Submission Checks Completed
06 May 2021Assigned to Editor
13 May 2021Reviewer(s) Assigned
01 Jun 2021Editorial Decision: Revise Minor
07 Jun 20212nd Revision Received
14 Jun 2021Submission Checks Completed
14 Jun 2021Assigned to Editor
16 Jun 2021Reviewer(s) Assigned