C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 89/00 (2006.01) B65D 65/46 (2006.01) C08L 1/28 (2006.01)
Patent
CA 2235931
The packing and even the excessive packaging of products for human consumption is a current practice in the industrialized countries. As this packaging is made primarily of non-biodegradable polymers, they currently cause environmental problems. These environmental problems are found not only in industrialized countries but also in developing countries. This situation supported the development of various films, more ecological, starting from biodegradable elements containing polysaccharides, proteins and/or lipids. We developed a biodegradable protein film from a casein salt of dairy origin. Casein is abundant and could even be recovered from unsold milk. The process of polymerization is induced by gamma irradiation. Indeed, the interaction of hydroxyl radicals with tyrosins present in protein creates a covalent bond (bityrosine). The addition of a plasticizing agent is essential in order to produce a more flexible and less friable film. The presence of glycerol does not inhibit the formation of bityrosine. It protects protein from the denaturation caused by irradiation, increases the deforming capacity and decreases the breaking strength of film. The biodegradation tests, carried out in our laboratories, showed that the film produced by gamma irradiation is accessible to the enzymatic attacks from Pseudomonas fragi.
Brault Denis
Lacroix Monique
Ressouany Mohamed
Brault Denis
Lacroix Monique
Mbm Intellectual Property Law Llp
Ressouany Mohamed
LandOfFree
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