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Journal of Thermal Analysis and Calorimetry

, Volume 102, Issue 1, pp 37–42 | Cite as

Heat-treated biodegradable films and foils of collagen hydrolysate crosslinked with dialdehyde starch

Article

Abstract

Gels of collagen hydrolysate (H) crosslinked with dialdehyde starch (DAS) are marked by a strong tendency to aging, which means a certain problem during their processing into biodegradable packaging materials. Applying casting technology and drying these materials by heating air-dry films and foils for a limited time (1–4 h) at 105 °C may eliminate the aging problem. Solubility of heat-treated films in an aqueous environment remains preserved, but depending on how long this temperature acts and on the DAS content in the film, time of film disintegration prolongs from 1–1.5 h to 1300 h (≈54 days). It is probably caused by the functional groups initially blocked by sorbed water, which get released to produce hydrogen inter-chain crosslinks. The decrease in glass transition temperature (T g) of such films varies with content of water sorbed in films in an interval of 90.2–189 °C.

Keywords

Collagen hydrolysate Dialdehyde starch Film curing Film disintegration Thermal treatment 

Notes

Acknowledgements

This work was accomplished in the scope of grant no. 7088352102. The authors wish to express their thanks to the Ministry of Education of the Czech Republic for financial support to this work.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2009

Authors and Affiliations

  1. 1.Faculty of Technology, Institute of Polymer EngineeringTomas Bata UniversityZlínThe Czech Republic

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