American Journal of Mechanical and Materials Engineering

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The α- and β-Relaxation Processes of Polymeric Chitosan from Squid Gladii as Revealed by Dynamic Mechanical Analysis

Received: 21 November 2018    Accepted: 13 December 2018    Published: 22 January 2019
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Abstract

Dynamic mechanical analysis, DMA, is a technique that can be used to study the mechanical properties of polymeric biomaterials so as to help unveil the physiological environments in which they can be applied. In this study, mechanical properties of chitosan (poly (β-(1→4)-N-acetyl-D-glucosamine)) thin films extracted from squid gladii found along the coastal areas of Kilifi and Mombasa in Kenya have been systematically investigated using DMA technique. From the study, chitosan thin film have shown a β- relaxation process occurring between 293K and 323K and the α- relaxation process hereby referred to as glass transition (Tg) occurring between 393K and 423K. Additionally, the chitosan films under the study are viscoelastic with very low mechanical damping suggesting that they have very high rigidity and resistance to deformation. The results from this study have thus given us an insight of the operating temperature range of the biomaterial.

DOI 10.11648/j.ajmme.20180204.12
Published in American Journal of Mechanical and Materials Engineering (Volume 2, Issue 4, December 2018)
Page(s) 40-45
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

α- Relaxation, β-Relaxation, Squid Gladii, Chitin, Chitosan, Acetylation, Deacetylation

References
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Author Information
  • Physics Department, Pwani University, Kilifi, Kenya

  • Physics Department, Pwani University, Kilifi, Kenya

  • Physics Department, Pwani University, Kilifi, Kenya

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  • APA Style

    Juma Hanif, John Onyango Agumba, Katana Gona Gabriel. (2019). The α- and β-Relaxation Processes of Polymeric Chitosan from Squid Gladii as Revealed by Dynamic Mechanical Analysis. American Journal of Mechanical and Materials Engineering, 2(4), 40-45. https://doi.org/10.11648/j.ajmme.20180204.12

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    ACS Style

    Juma Hanif; John Onyango Agumba; Katana Gona Gabriel. The α- and β-Relaxation Processes of Polymeric Chitosan from Squid Gladii as Revealed by Dynamic Mechanical Analysis. Am. J. Mech. Mater. Eng. 2019, 2(4), 40-45. doi: 10.11648/j.ajmme.20180204.12

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    AMA Style

    Juma Hanif, John Onyango Agumba, Katana Gona Gabriel. The α- and β-Relaxation Processes of Polymeric Chitosan from Squid Gladii as Revealed by Dynamic Mechanical Analysis. Am J Mech Mater Eng. 2019;2(4):40-45. doi: 10.11648/j.ajmme.20180204.12

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  • @article{10.11648/j.ajmme.20180204.12,
      author = {Juma Hanif and John Onyango Agumba and Katana Gona Gabriel},
      title = {The α- and β-Relaxation Processes of Polymeric Chitosan from Squid Gladii as Revealed by Dynamic Mechanical Analysis},
      journal = {American Journal of Mechanical and Materials Engineering},
      volume = {2},
      number = {4},
      pages = {40-45},
      doi = {10.11648/j.ajmme.20180204.12},
      url = {https://doi.org/10.11648/j.ajmme.20180204.12},
      eprint = {https://download.sciencepg.com/pdf/10.11648.j.ajmme.20180204.12},
      abstract = {Dynamic mechanical analysis, DMA, is a technique that can be used to study the mechanical properties of polymeric biomaterials so as to help unveil the physiological environments in which they can be applied. In this study, mechanical properties of chitosan (poly (β-(1→4)-N-acetyl-D-glucosamine)) thin films extracted from squid gladii found along the coastal areas of Kilifi and Mombasa in Kenya have been systematically investigated using DMA technique. From the study, chitosan thin film have shown a β- relaxation process occurring between 293K and 323K and the α- relaxation process hereby referred to as glass transition (Tg) occurring between 393K and 423K. Additionally, the chitosan films under the study are viscoelastic with very low mechanical damping suggesting that they have very high rigidity and resistance to deformation. The results from this study have thus given us an insight of the operating temperature range of the biomaterial.},
     year = {2019}
    }
    

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    AU  - Juma Hanif
    AU  - John Onyango Agumba
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    T2  - American Journal of Mechanical and Materials Engineering
    JF  - American Journal of Mechanical and Materials Engineering
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    PB  - Science Publishing Group
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    AB  - Dynamic mechanical analysis, DMA, is a technique that can be used to study the mechanical properties of polymeric biomaterials so as to help unveil the physiological environments in which they can be applied. In this study, mechanical properties of chitosan (poly (β-(1→4)-N-acetyl-D-glucosamine)) thin films extracted from squid gladii found along the coastal areas of Kilifi and Mombasa in Kenya have been systematically investigated using DMA technique. From the study, chitosan thin film have shown a β- relaxation process occurring between 293K and 323K and the α- relaxation process hereby referred to as glass transition (Tg) occurring between 393K and 423K. Additionally, the chitosan films under the study are viscoelastic with very low mechanical damping suggesting that they have very high rigidity and resistance to deformation. The results from this study have thus given us an insight of the operating temperature range of the biomaterial.
    VL  - 2
    IS  - 4
    ER  - 

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