Authors:
B. Bogdanov Department of Organic Chemistry, Polymer Materials Research Group,Institute for Biomedical Technologies (IBITECH), University of Ghent, Krijgslaan 281, S4 (bis), B-9000 Ghent, Belgium

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E. Schacht Department of Organic Chemistry, Polymer Materials Research Group,Institute for Biomedical Technologies (IBITECH), University of Ghent, Krijgslaan 281, S4 (bis), B-9000 Ghent, Belgium

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A. Van Den Bulcke Department of Organic Chemistry, Polymer Materials Research Group,Institute for Biomedical Technologies (IBITECH), University of Ghent, Krijgslaan 281, S4 (bis), B-9000 Ghent, Belgium

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Abstract  

Hydrogels prepared by crosslinkage of gelatin with dextran dialdehyde have been characterized by dynamic shear oscillation measurements at small strain. Isothermal as well as temperature scan measurements were performed. The results obtained demonstrated that the final polymer network is a result of a chemical gelatin-dextran dialdehyde interaction as well as a gelatin-gelatin (physical association) and a polymer-solvent interaction. This balance is strongly dependent on the composition of the system, the polymer concentration, the storage temperature and the storage time. We found that a short cryogenic treatment at −20°C of physically structured gels, significantly increases the chemical crosslinkage. DSC measurements at low cooling rate confirm these results and demonstrate a chemical reaction enthalpy contribution.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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