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Solvent release from highly swollen gels under compression: an important phenomenon that has to be taken into account

Abstract : The behavior of a strongly charged polyelectrolyte gel under a uniaxial compression was studied, demonstrating the evidence of gel deformation and volume loss at the same time. A theoretical approach shows that solvent release takes place for both weakly charged and neutral gels, being more pronounced for polyelectrolyte hydrogels = Nous avons étudié le comportement de gels fortement polyélectrolytiques sous compression uniaxiale. Il est observé que le gel se déforme et expulse de son solvant en même temps. Une analyse théorique prédit cette perte de solvant pour des gels faiblement chargés comme pour des gels neutres. Le phénomène est plus prononcé pour le cas du gel polyélectrolytique.
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Tatiana Budtova, Stanislav Patlazhan, Sylvie Vervoort, Jan Weyts. Solvent release from highly swollen gels under compression: an important phenomenon that has to be taken into account. 38ème colloque annuel du Groupe Français de Rhéologie, Oct 2003, Brest, France. 4 p. ⟨hal-00579407⟩

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