Title of article :
Swelling of nonionic N-isopropyl acrylamide hydrogels in aqueous solutions of (acetic acid or pyridine)
Author/Authors :
Orlov، نويسنده , , Yury and Xu، نويسنده , , Xiaoping and Maurer، نويسنده , , Gerd، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Abstract :
Gels are crosslinked macromolecules (polymer networks). The crosslinking results in an elastic behavior of the polymer network. When the segments of the network contain hydrophilic groups, the gels are called “hydrogels”. Hydrogels respond to their surroundings by a volume change, i.e. they swell or shrink. This paper reports new experimental results for the swelling behavior of some nonionic, synthetic hydrogels of N-isopropyl acrylamide in aqueous solutions of a single organic solvent (acetic acid and pyridine) at 298 K. The experimental results are correlated applying a thermodynamic model, which combines an expression for the Gibbs energy of a liquid phase with an equation for the Helmholtz energy of an elastic network.
Keywords :
N-isopropyl acrylamide , Synthetic chemically crosslinked nonionic hydrogels , Swelling equilibrium in water and aqueous solutions , Acetic acid , pyridine , Modelling , experimental data
Journal title :
Fluid Phase Equilibria
Journal title :
Fluid Phase Equilibria