Nanotech 2001 Vol. 1
Nanotech 2001 Vol. 1
Technical Proceedings of the 2001 International Conference on Modeling and Simulation of Microsystems

Numerics, Algorithms Chapter 2

Modeling of Ionic Hydrogel Kinetics in Buffered Solutions

Authors: R.R. Ohs, S.K. De and N.R. Aluru

Affilation: University of Illinois at Urbana-Champaign, United States

Pages: 7 - 10

Keywords: hydrogels, simulation, swelling, experiments, meshless method

Abstract:
In this paper, we present the meshless Finite Cloud Method (FCM) for the solution of a time-dependent partial differential equation governing ionic gel swelling. Using a point distribution, FCM constructs interpolation functions without assuming any connectivity between points. A collocation approach forces the unknowns at every point to satisfy the governing equation or boundary condition. To validate the model, a cylindrical hydrogel was fabricated and subjected to step changes in solution pH to characterize the hydrogel's dynamic behavior. The hydrogel's equilibrium behavior was matched using a thermodynamic model. Numerical results show good agreement with experimental data.

Modeling of Ionic Hydrogel Kinetics in Buffered Solutions

ISBN: 0-9708275-0-4
Pages: 638