Paper Title:
Raman Spectroscopy: Mutual Diffusion Coefficient in Hydrogels
  Abstract

A hydrogel kept at its equilibrium swelling state during taking the measurements controlled in a diffusion cell. The diffusion data gained from Raman spectra were analyzed to calculate the mutual diffusion coefficient in the hydrogel as semi-infinite medium. The relation between the solute concentration and Raman intensity for poly(N-isopropylacrylamide), which is characterized by the distinct peak for the isopropyl group at 2925 cm-1 was taken into account. The determination of the mutual diffusion coefficient, Dmut for hydrogels/phenol system was achieved successfully using confocal Raman spectroscopy at different solute concentrations. At 25oC, the value of the mutual diffusion coefficient is found between 5.61845x10-11 m2/s and 3.34565x10-9 m2/s for the hydrogel loaded with phenol of an initial concentration of 0.01 mM and 0.1 mM, respectively.

  Info
Periodical
Defect and Diffusion Forum (Volumes 312-315)
Edited by
Andreas Öchsner, Graeme E. Murch and João M.P.Q. Delgado
Pages
193-198
DOI
10.4028/www.scientific.net/DDF.312-315.193
Citation
A.A. Naddaf, H.J. Bart, "Raman Spectroscopy: Mutual Diffusion Coefficient in Hydrogels", Defect and Diffusion Forum, Vols. 312-315, pp. 193-198, 2011
Online since
April 2011
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Price
$32.00
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