Coupled non-fickian diffusion and large deformation of hydrogels

Howon Lee, Jiaping Zhang, Jiaxi Lu, John Georgiadis, Hanqing Jiang, Nicholas Fang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Solvent migration in swelling polymer shows complex behaviour, as the interface of wet (rubbery) region moves along with solvent diffusion into the dry (glassy) region, which is accompanied by local deformation. This extrinsic mechanism has led to novel three-dimensional (3D) polymer micro-actuators using direct solvent delivery via microfluidic channels. Here we present experimental techniques to quantify the non-Fickian diffusion in the swelling polymer in an attempt to predict the dynamics of local deformation in such solvent driven micro-actuators. We recorded the evolving diffusion front of solvent in poly(ethylene glycol) diacrylate (PEG-DA) hydrogel upon wetting. In order to measure diffusivity of solvent in the polymer, magnetic resonance imaging (MRI) was used. Simulation result from the theory shows good agreement with Case II non-Fickian swelling experiment. We expect that our experimental methods for such coupled diffusion and deformation will help better capture the underlying physics of hydrogel behaviour and provide fundamental basis in exploration of various hydrogel applications.

Original languageEnglish (US)
Title of host publicationConference Proceedings of the Society for Experimental Mechanics Series
Pages25-28
Number of pages4
Volume3
StatePublished - 2011
Event2011 SEM Annual Conference on Experimental and Applied Mechanics - Uncasville, CT, United States
Duration: Jun 13 2011Jun 16 2011

Other

Other2011 SEM Annual Conference on Experimental and Applied Mechanics
CountryUnited States
CityUncasville, CT
Period6/13/116/16/11

Fingerprint

Hydrogels
Swelling
Polymers
Actuators
Magnetic resonance
Microfluidics
Polyethylene glycols
Wetting
Physics
Imaging techniques
Experiments

ASJC Scopus subject areas

  • Engineering(all)
  • Computational Mechanics
  • Mechanical Engineering

Cite this

Lee, H., Zhang, J., Lu, J., Georgiadis, J., Jiang, H., & Fang, N. (2011). Coupled non-fickian diffusion and large deformation of hydrogels. In Conference Proceedings of the Society for Experimental Mechanics Series (Vol. 3, pp. 25-28)

Coupled non-fickian diffusion and large deformation of hydrogels. / Lee, Howon; Zhang, Jiaping; Lu, Jiaxi; Georgiadis, John; Jiang, Hanqing; Fang, Nicholas.

Conference Proceedings of the Society for Experimental Mechanics Series. Vol. 3 2011. p. 25-28.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Lee, H, Zhang, J, Lu, J, Georgiadis, J, Jiang, H & Fang, N 2011, Coupled non-fickian diffusion and large deformation of hydrogels. in Conference Proceedings of the Society for Experimental Mechanics Series. vol. 3, pp. 25-28, 2011 SEM Annual Conference on Experimental and Applied Mechanics, Uncasville, CT, United States, 6/13/11.
Lee H, Zhang J, Lu J, Georgiadis J, Jiang H, Fang N. Coupled non-fickian diffusion and large deformation of hydrogels. In Conference Proceedings of the Society for Experimental Mechanics Series. Vol. 3. 2011. p. 25-28
Lee, Howon ; Zhang, Jiaping ; Lu, Jiaxi ; Georgiadis, John ; Jiang, Hanqing ; Fang, Nicholas. / Coupled non-fickian diffusion and large deformation of hydrogels. Conference Proceedings of the Society for Experimental Mechanics Series. Vol. 3 2011. pp. 25-28
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