What is it about?

Degradable films made of gelatin, tannic acid and nanoclays caused an improvement on the overall properties of such films, as its strength, water solubility, temperature resistance. These films could be used to wrap flowers, fruits and vegetables.

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Why is it important?

Gelatin films are produced from natural resources, they are totally degradable and environment-friendly as compared to the ordinary films made from petroleum derivatives, that are highly polluting because of its slow or no-degradation.


This work has shown that some interactions among the gelatin films might be strong enough, to enhance the physicochemical properties of gelatin films. When doing this work it was shown that gelatin was in solution, its chains and bentonite, tannic acid and glycerol were free and accessible to water. When the applied casting process started water evaporation occurred, and various interactions such as physical and physico-chemical interactions among gelatin chains, gelatin– tannic acid, gelatin–bentonite, gelatin–glycerol and gelatin– tannic acid–bentonite–glycerol, could take place. Additional research is needed to seek for interactions among tannins, bentonite and gelatin as part of some materials.

Javier Solorza
Instituto Politecnico Nacional

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This page is a summary of: Obtainment and partial characterization of biodegradable gelatin films with tannic acid, bentonite and glycerol, Journal of the Science of Food and Agriculture, January 2016, Wiley, DOI: 10.1002/jsfa.7524.
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