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Green Processing and Synthesis

Editor-in-Chief: Hessel, Volker

Editorial Board: Akay, Galip / Arends, Isabel / Cann, Michael C. / Cheng, Yi / Cravotto, Giancarlo / Gruber-Wölfler, Heidrun / Kralisch, Dana / D. P. Nigam, Krishna / Saha, Basudeb / Serra, Christophe A. / Zhang, Wei

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2191-9550
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Volume 6, Issue 5

Issues

Preparation, characterization, and antioxidant activity of water-soluble oligochitosan

Ngoc Thuy Nguyen / Dong Quy Hoang / Ngoc Duy Nguyen
  • Research and Development Center for Radiation Technology, Viet Nam Atomic Energy Institute, Hanoi, Vietnam
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Quoc Hien Nguyen
  • Corresponding author
  • Research and Development Center for Radiation Technology, Viet Nam Atomic Energy Institute, Hanoi, Vietnam
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Dai Hai Nguyen
Published Online: 2017-02-07 | DOI: https://doi.org/10.1515/gps-2016-0126

Abstract

The preparation of oligochitosan through the heterogeneous degradation of chitosan/H2O2 combined with the homogeneous reaction of chitosan with H2O2 under gamma radiation was studied. Oligochitosan with weight-average molecular weight (Mw) of less than 10 kDa could be efficiently prepared by gamma Co60 irradiation of chitosan solution (4%) and hydrogen peroxide (0.5%) at doses ranging from 8 to 24 kGy. The Mw, chemical structure, and the crystallinity of chitosan and oligochitosan were characterized by GPC, FT-IR, and XRD. The solubility and antioxidant activity of chitosan and of oligochitosan with the different molecular weights were investigated. Results showed that oligochitosan CS5 (20 kGy) and CS6 (24 kGy) have good solubility in the pH range of 3 to –11. The scavenge percentage of CS5 against 2,2-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) radical is 99.2% in 90 min. The antioxidant activity of oligochitosan is effective in a short time period; therefore, it has potential application as an effective and natural antioxidant.

Keywords: antioxidant activity; chitosan; degradation; gamma Co60; oligochitosan

References

About the article

Ngoc Thuy Nguyen

Ngoc Thuy Nguyen received her Bachelor’s degree in 2014 from the University of Science, HCMC, Vietnam. She is currently pursuing her Master’s degree at the University of Science, HCMC, Vietnam, focusing on the synthesis and investigation of the properties of oligochitosan/nanosilica hybrid material. Her research interests include polymers, composite materials, and biopolymers.

Dong Quy Hoang

Dong Quy Hoang holds a PhD in Polymer Science and Engineering from Sungkyunkwan University, South Korea (2009). Currently, she is a lecturer at the Department of Polymer and Composite Materials, Faculty of Materials Science, University of Science, Ho Chi Minh City, Vietnam. She is mainly engaged in the study of the synthesis of polymers, biopolymers, composites, biocomposites, and flame-retardant polymers.

Ngoc Duy Nguyen

Ngoc Duy Nguyen, PhD, is currently working as a scientific researcher at the Research and Development Center for Radiation Technology, Ho Chi Minh City, Vietnam. His research interests focus on radiation processing technology (γ-ray and electron beam) for the synthesis and modification of polymer materials, nano materials, and nano composites.

Quoc Hien Nguyen

Quoc Hien Nguyen, Associate Professor, works as a researcher at the Research and Development Center for Radiation Technology, Ho Chi Minh City, Vietnam; he is also a lecturer at the University of Science, Ho Chi Minh City, Vietnam. His research interests focus on radiation processing technology (γ-ray and electron beam) for the synthesis and modification of polymer materials, nano materials, and nano composites.

Dai Hai Nguyen

Dai Hai Nguyen obtained his PhD from Ajou University, Republic of Korea, in 2013. Currently, he works as a researcher at the Institute of Applied Materials Science, Vietnam Academy of Science and Technology. He is also an invited lecturer at TraVinh University and University of Science, Ho Chi Minh City, Vietnam.


Received: 2016-07-16

Accepted: 2016-11-15

Published Online: 2017-02-07

Published in Print: 2017-09-26


Citation Information: Green Processing and Synthesis, Volume 6, Issue 5, Pages 461–468, ISSN (Online) 2191-9550, ISSN (Print) 2191-9542, DOI: https://doi.org/10.1515/gps-2016-0126.

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