title: Biodegradable packing materials from hydrolysates of collagen waste proteins.
abstract: Enzymatic hydrolysates of waste collagen proteins (H), from current industrial manufacture (leather, edible meat product casings, etc.) of mean molecular mass 20-30 kDa by a reaction with dialdehyde starch (DAS), produces hydrogels applicable as biodegradable (or even edible) packaging materials for food, cosmetic and pharmaceutical products. Thermo-reversibility of prepared hydrogels is given by concentrations of H and DAS in a reaction mixture. At concentrations of H 25-30% (w/w) and that of DAS 15-20% (related to weight of hydrolysate), thermo-reversible hydrogels arise, which can be processed into packaging materials by a technique similar to that of soft gelatin capsules (SGC). Exceeding the limit of 20% DAS leads to hydrogels that are thermo-reversible only in part, a further increase in DAS concentration then leads to thermo-irreversible gels whose processing into biodegradable packaging materials necessitates employment of other procedures.
authors: Institute of Polymer Engineering, Faculty of Technology, Tomas Bata University, Nám. TGM 275, Zlin CZ 762 65, Czech Republic. Langmaier@ft.utb.cz
authors: F
authors: F
authors: Langmaier
authors: P
authors: P
authors: Mokrejs
authors: K
authors: K
authors: Kolomaznik
authors: M
authors: M
authors: Mladek
mesh_terms: D003094:Collagen / Q000737:chemistry*; D003247:Conservation of Natural Resources / Q000379:methods*; D007220:Industrial Waste; D017744:Medical Waste Disposal / Q000379:methods*; D019064:Product Packaging; D011492:Protein Hydrolysates / Q000737:chemistry*
chemical_list: D007220:Industrial Waste; D017744:Medical Waste Disposal; D011492:Protein Hydrolysates; D003094:Collagen