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Wetting of polymers by their solvents
François Lequeux1,2, Laurence Talini3,4, Emilie Verneuil1,2
1École Supérieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI) ParisTech, PSL Research University, Sciences et Ingénierie de la matière Molle, CNRS UMR7615, 10, Rue Vauquelin, F-75231, Paris Cedex 05, France.
The European Physical Journal. E, Soft Matter
|February 28, 2016
Summary
Solvent wetting on soluble polymers shows dynamic contact angles, unlike insoluble substrates. Solvent absorption significantly alters polymer properties, impacting spreading and powder dissolution.
Area of Science:
- Polymer Science
- Physical Chemistry
- Materials Science
Background:
- Wetting dynamics of soluble polymers by solvents are complex and differ from insoluble substrates.
- Solvent absorption significantly alters polymer properties, influencing wetting behavior.
- Understanding these interactions is crucial for applications like powder dissolution.
Purpose of the Study:
- To review and present new findings on the wetting of soluble polymeric substrates by their solvents.
- To investigate the influence of solvent content and polymer properties on wetting dynamics.
- To explore the relationship between polymer molar mass, wetting, and powder dissolution.
Main Methods:
- Review of existing literature and in-house research on polymer wetting.
- Experimental studies on the wetting of hydrophilic amorphous polymers by solvents.
- Analysis of the impact of solvent sorption on polymer physical properties.
- Investigation of polymers with varying molar masses.
Main Results:
- Wetting angle varies with contact line velocity even at low capillary numbers for soluble polymers.
- Solvent content, influenced by initial conditions and transfer during spreading, is critical.
- Solvent sorption induces significant changes in polymer physical properties, affecting wetting.
- Polymer molar mass influences wetting behavior and offers insights into powder dissolution.
Conclusions:
- Soluble polymer wetting is a dynamic process highly sensitive to solvent absorption and polymer property changes.
- The study provides a deeper understanding of solvent-polymer interactions during wetting.
- New findings on varying molar masses open avenues for improved powder dissolution strategies.
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