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Monitoring and modelling of oxygen transport through un-crosslinked and crosslinked gelatine gels.

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Title: Monitoring and modelling of oxygen transport through un-crosslinked and crosslinked gelatine gels.
Authors: Elsayed, Y.1 yahya_elsayed@hotmail.com, Lekakou, C.1, Tomlins, P.2
Source: Polymer Testing. Dec2014, Vol. 40, p106-115. 10p.
Subjects: Crosslinked polymers, Gelatin, Quenching (Chemistry), Luminescence quenching, Mass transfer, Diffusion
Abstract: A non-invasive, luminescence quenching technique is developed for continuous monitoring of oxygen spatial-temporal concentration distribution in fully hydrated gelatine gels, intended for use as scaffolds in tissue engineering. Two mass transfer-diffusion models were used to simulate the unsteady-state oxygen mass transport in the system. Oxygen diffusion coefficient and mass transfer coefficient at the water-gel interface were determined for un-crosslinked gelatine, as well as gelatine crosslinked with 1 and 1.5% w/v glutaraldehyde. While crosslinking and increased concentration of the crosslinking agent reduced oxygen mass transfer across the gel surface, both factors increased the diffusion coefficient of oxygen in the bulk of the gel. Voids in the gelatine's microstructure, which were generated during the crosslinking process due to shrinkage and associated internal stresses, were associated with both increasing the diffusion coefficient within the gel, as well as inhomogeneous diffusion of oxygen within the gel. [ABSTRACT FROM AUTHOR]
Copyright of Polymer Testing is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 99214889
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Monitoring and modelling of oxygen transport through un-crosslinked and crosslinked gelatine gels.
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  Data: <searchLink fieldCode="AR" term="%22Elsayed%2C+Y%2E%22">Elsayed, Y.</searchLink><relatesTo>1</relatesTo><i> yahya_elsayed@hotmail.com</i><br /><searchLink fieldCode="AR" term="%22Lekakou%2C+C%2E%22">Lekakou, C.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Tomlins%2C+P%2E%22">Tomlins, P.</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Polymer+Testing%22">Polymer Testing</searchLink>. Dec2014, Vol. 40, p106-115. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Crosslinked+polymers%22">Crosslinked polymers</searchLink><br /><searchLink fieldCode="DE" term="%22Gelatin%22">Gelatin</searchLink><br /><searchLink fieldCode="DE" term="%22Quenching+%28Chemistry%29%22">Quenching (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Luminescence+quenching%22">Luminescence quenching</searchLink><br /><searchLink fieldCode="DE" term="%22Mass+transfer%22">Mass transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Diffusion%22">Diffusion</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: A non-invasive, luminescence quenching technique is developed for continuous monitoring of oxygen spatial-temporal concentration distribution in fully hydrated gelatine gels, intended for use as scaffolds in tissue engineering. Two mass transfer-diffusion models were used to simulate the unsteady-state oxygen mass transport in the system. Oxygen diffusion coefficient and mass transfer coefficient at the water-gel interface were determined for un-crosslinked gelatine, as well as gelatine crosslinked with 1 and 1.5% w/v glutaraldehyde. While crosslinking and increased concentration of the crosslinking agent reduced oxygen mass transfer across the gel surface, both factors increased the diffusion coefficient of oxygen in the bulk of the gel. Voids in the gelatine's microstructure, which were generated during the crosslinking process due to shrinkage and associated internal stresses, were associated with both increasing the diffusion coefficient within the gel, as well as inhomogeneous diffusion of oxygen within the gel. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Polymer Testing is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.polymertesting.2014.08.016
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      – Code: eng
        Text: English
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        PageCount: 10
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    Subjects:
      – SubjectFull: Crosslinked polymers
        Type: general
      – SubjectFull: Gelatin
        Type: general
      – SubjectFull: Quenching (Chemistry)
        Type: general
      – SubjectFull: Luminescence quenching
        Type: general
      – SubjectFull: Mass transfer
        Type: general
      – SubjectFull: Diffusion
        Type: general
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      – TitleFull: Monitoring and modelling of oxygen transport through un-crosslinked and crosslinked gelatine gels.
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            – D: 01
              M: 12
              Text: Dec2014
              Type: published
              Y: 2014
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