Meshless Simulation of Equilibrium Swelling/Deswelling of PH-Sensitive Hydrogels
Article
Article Title | Meshless Simulation of Equilibrium Swelling/Deswelling of PH-Sensitive Hydrogels |
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Article Category | Article |
Authors | Wang, Q. X. (Author), Li, H. (Author) and Lam, K. Y. (Author) |
Journal Title | Journal of Polymer Science Part B: Polymer Physics |
Journal Citation | 44 (2), pp. 326-337 |
Number of Pages | 12 |
Year | 2005 |
Place of Publication | United States |
ISSN | 0887-6266 |
1099-0488 | |
Digital Object Identifier (DOI) | https://doi.org/10.1002/polb.20698 |
Web Address (URL) | https://onlinelibrary.wiley.com/doi/full/10.1002/polb.20698 |
Abstract | Hydrogels have been widely used in microelectromechanical systems (MEMS) and Bio-MEMS devices. In this article, the equilibrium swelling/deswelling of the pH-stimulus cylindrical hydrogel in the microchannel is studied and simulated by the meshless method. The multi-field coupling model, called multi-effect-coupling pH-stimulus (MECpH) model, is presented and used to describe the chemical field, electric field, and the mechanical field involved in the problem. The partial differential equations (PDEs) describing these three fields are either nonlinear or coupled together. This multi-field coupling and high nonlinear characteristics produce difficulties for the conventional numerical methods (e.g., the finite element method or the finite difference method), so an alternative-meshless method is developed to discretize the PDEs, and the efficient iteration technique is adopted to solve the nonlinear problem. The computational results for the swelling/deswelling diameter of the hydrogel under the different pH values are firstly compared with experimental results, and they have a good agreement. The influences of other parameters on the mechanical properties of the hydrogel are also investigated in detail. It is shown that the multifield coupling model and the developed meshless method are efficient, stable, and accurate for simulation of the properties of the stimuli-sensitive hydrogel. |
Keywords | Bio-MEMS; Mechanical property; MEMS; Meshless method; Numerical simulation; Stimuli-sensitive polymers |
ANZSRC Field of Research 2020 | 401608. Organic semiconductors |
401706. Numerical modelling and mechanical characterisation | |
401609. Polymers and plastics | |
401602. Composite and hybrid materials | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Institute of High Performance Computing, Singapore |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q7282/meshless-simulation-of-equilibrium-swelling-deswelling-of-ph-sensitive-hydrogels
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