AL-Baradi, A.M., Mears, M., Jones, R.A.L. et al. (1 more author) (2012) Diffusion of dextran within poly(methacrylic acid) hydrogels. Journal of Polymer Science Part B: Polymer Physics, 50 (18). 1286 - 1292. ISSN 0887-6266
Abstract
We describe an investigation of fluorescence correlation spectroscopy into the diffusion of fluorescein-tagged dextran (FDEX) in a poly(methacrylic acid) (PMAA) hydrogel. The temperature dependence of FDEX diffusion is shown to follow Zimm behavior in pure water, and the decrease in the diffusion coefficient when in the PMAA hydrogel has been modeled. The addition of acid and alkali (HCl and NaOH, respectively) not only control the swelling and collapse of the hydrogel but also reveal a strong pH dependence of the dextran diffusion coefficient, which shows a (nonmonatonic) increase with pH. The addition of NaCl and CaCl2 salts similarly showed evidence of network swelling, most notably at low salt concentration, but also that the diffusion coefficient within the gel at these low concentrations is larger than that in the equivalent solution without the hydrogel, indicating that the combination of hydrogel and salt works to increase the diffusion coefficient above that in pure water.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Copyright 2012 Wiley Periodicals, Inc. This is an author produced version of a paper subsequently published in Journal of Polymer Science Part B: Polymer Physics. Uploaded in accordance with the publisher's self-archiving policy. This is the peer reviewed version of the following article: 'Diffusion of dextran within poly(methacrylic acid) hydrogels', which has been published in final form at https://doi.org/10.1002/polb.23120. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving (http://olabout.wiley.com/WileyCDA/Section/id-820227.html#terms). |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 06 Oct 2015 12:58 |
Last Modified: | 05 Nov 2017 22:31 |
Published Version: | https://doi.org/10.1002/polb.23120 |
Status: | Published |
Publisher: | Wiley |
Refereed: | Yes |
Identification Number: | 10.1002/polb.23120 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:79454 |