Gelatin-based films

Collagen films formed by reticulations of amine and carboxyl groups gelatin-based films flexible, clear, widi good oxygen barrier properties, but poor moisture resistance classical formulations 20-30% gelatin, 10-30% plasticizer mid water. 

Carvalho de, R. A. and Grosso, C. R. F. (2004). Characterization of gelatin based films modified with transglutaminase, glyoxal and formaldehyde. Food Hydrocolloids 18,717-726. 

Mechanical and Water Vapor Properties of Gelatin-Based Films as Function of Relative Humidity, Temperature, and Film Thickness... 

Mechanical and Water Vapor Properties of Gelatin-Based Films... 

Puncture force (a) and puncture deformation (b) as function of the relative humidity of conditioning and film thickness in gelatin-based films. 

The properties of gelatin-based films are strongly influenced by the film thickness and the conditioning conditions. It was verified that an increment of the relative humidity provokes a reduction of the puncture force and an increase of the pimcture deformation. The temperature also affects the water vapor permeability of the films, but this effect depends on the film thickness. 

Sobral, P.J.A., Menegalli, F.C., Hubinguer, M.D., and Roques, M.A. Mechanical, water vapor barrier and thermal properties of gelatin based edible films. Food Hydrocolloids, 15, 423, 2001. 

AVELLANEDA, c., VIEIRA, D., AL-KAHLOUT, A., et ai, Sofid-state electrochtomic devices with Nb205 Mo thin film and gelatin-based electrolyte, Electrochim. Acta, 2007,53,1648-54. 

Jo, C., Kang, H., Lee, N. Y., Kwon, J. H. Byun, M. W. (2005). Pectin- and gelatin-based film effect of gamma irradiation on the mechanical properties and biodegradation... 

Kim, S., Nimni, M.E, Yang Zh, Han, B. Chitosan/Gelatin-Based Films Crosslinked by Proanthocyanidin. J Biomed Mater Res Part B Appl Biomater (2005), 75B, 442 50. 

Uses of gelatin are based on its combination of properties reversible gel-to-sol transition of aqueous solution viscosity of warm aqueous solutions abUity to act as a protective coUoid water permeabUity and insolubUity in cold water, but complete solubUity in hot water. It is also nutritious. These properties are utilized in the food, pharmaceutical, and photographic industries. In addition, gelatin forms strong, uniform, clear, moderately flexible coatings which readily sweU and absorb water and are ideal for the manufacture of photographic films and pharmaceutical capsules. 

The first satisfactory photographic film was produced in 1888 when gelatin-dispersed microcrystals of silver haUde were coated on celluloid sheets (23). Within a year George Eastman prepared and marketed toU films on a base produced by dissolving nitrocellulose with camphor and amyl acetate in methanol (qv). 

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