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Wetting of polymers by their solvents

. We review the studies on the wetting of soluble polymeric substrates by their solvents, both in the literature and conducted in our group in the past decade. When a droplet of solvent spreads on a soluble polymer layer, its wetting angle can strongly vary with the contact line velocity even at cap...

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Published in:The European physical journal. E, Soft matter and biological physics Soft matter and biological physics, 2016-02, Vol.39 (2), p.12-12, Article 12
Main Authors: Lequeux, François, Talini, Laurence, Verneuil, Emilie, Delannoy, Guillaume, Valois, Pauline
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description . We review the studies on the wetting of soluble polymeric substrates by their solvents, both in the literature and conducted in our group in the past decade. When a droplet of solvent spreads on a soluble polymer layer, its wetting angle can strongly vary with the contact line velocity even at capillary numbers smaller than unity, in contrast to non-soluble substrates. The solvent content in the polymer is a key parameter for the spreading dynamics; that content is set by the initial conditions, but also by the transfers occurring from the droplet to the polymer layer during spreading. We focus on hydrophilic amorphous polymers that are glassy at room temperature, and we discuss the consequences on wetting of the very large changes in the polymer physical properties induced by solvent sorption. We finally present new results on polymers of varying molar masses, and show how they open new perspectives for a better understanding of powder dissolution. Graphical abstract
doi_str_mv 10.1140/epje/i2016-16012-y
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We review the studies on the wetting of soluble polymeric substrates by their solvents, both in the literature and conducted in our group in the past decade. When a droplet of solvent spreads on a soluble polymer layer, its wetting angle can strongly vary with the contact line velocity even at capillary numbers smaller than unity, in contrast to non-soluble substrates. The solvent content in the polymer is a key parameter for the spreading dynamics; that content is set by the initial conditions, but also by the transfers occurring from the droplet to the polymer layer during spreading. We focus on hydrophilic amorphous polymers that are glassy at room temperature, and we discuss the consequences on wetting of the very large changes in the polymer physical properties induced by solvent sorption. We finally present new results on polymers of varying molar masses, and show how they open new perspectives for a better understanding of powder dissolution. 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subjects Biological and Medical Physics
Biophysics
Chemical Sciences
Complex Fluids and Microfluidics
Complex Systems
Nanotechnology
Physics
Physics and Astronomy
Polymer Sciences
Polymers - chemistry
Regular Article
Soft and Granular Matter
Solvents - chemistry
Surfaces and Interfaces
Thin Films
Water - chemistry
Wettability
Wetting and Drying: Physics and Pattern Formation
title Wetting of polymers by their solvents
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