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Journal of Polymer Engineering

Editor-in-Chief: Grizzuti, Nino

IMPACT FACTOR 2018: 1.072

CiteScore 2018: 1.17

SCImago Journal Rank (SJR) 2018: 0.282
Source Normalized Impact per Paper (SNIP) 2018: 0.691

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Volume 39, Issue 5


Effect of gamma irradiation on the physicochemical and rheological properties of enzyme-catalyzed tragacanth-based injectable hydrogels

Moslem Tavakol
  • Corresponding author
  • Department of Chemical & Polymer Engineering, Faculty of Engineering, Yazd University, Yazd, Iran
  • Central Iran Research Complex, NSTI, Yazd, Iran
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  • Other articles by this author:
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/ Ebrahim Vasheghani-Farahani
  • Corresponding author
  • Biomedical Engineering Division, Faculty of Chemical Engineering, Tarbiat Modares University, P.O. Box 14115-143, Tehran, Iran
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/ Mohammad Amin Mohammadifar
  • Research Group for Food Production Engineering, National Food Institute, Technical University of Denmark, SøltoftsPlads, 2800, Kgs. Lyngby, Denmark
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/ Maryam Dehghan-Niri
  • Biomedical Engineering Division, Faculty of Chemical Engineering, Tarbiat Modares University, P.O. Box 14115-143, Tehran, Iran
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Published Online: 2019-04-12 | DOI: https://doi.org/10.1515/polyeng-2018-0366


In the present study, gamma irradiation was applied to promote the mechanical properties of enzyme- mediated in situ forming hydrogels prepared with tyramine-functionalized gum tragacanth (TA-GT). For this purpose, after gamma irradiation of powder or hydrocolloid solution of gum tragacanth (GT), the physiochemical and rheological properties of GT solution, and resultant hydrogel was investigated. In situ forming hydrogels were prepared via horseradish peroxidase catalyzed coupling reaction of TA-GT in the presence of hydrogen peroxide. Gamma irradiation led to a decrease in GT molecular weight and solution viscosity. Also, the solubility of GT improved and the separation of water soluble/swellable part of gum samples became easier, using gamma irradiation. In addition, by gamma irradiation of GT powder at doses of 5–15 kGy, a polymeric solution with higher concentration could be prepared that resulted in the promotion of hydrogels storage modulus. Further increase of irradiation dose did not improve storage modulus due to the extra decrease of gum molecular weight.

Keywords: gamma irradiation; injectable hydrogel; physiochemical properties; rheological properties; tragacanth


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About the article

Received: 2018-12-07

Accepted: 2019-03-01

Published Online: 2019-04-12

Published in Print: 2019-05-01

Citation Information: Journal of Polymer Engineering, Volume 39, Issue 5, Pages 442–449, ISSN (Online) 2191-0340, ISSN (Print) 0334-6447, DOI: https://doi.org/10.1515/polyeng-2018-0366.

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