Tensile Strength, Elongation at Breaking Point and Surface Color of a Biodegradable Film Based on a Duck Feet Gelatin and Polyvinyl Alcohol Blend

Nur Harizah Binti Che Wan, Abdorreza Mohammadi Nafchi, Nurul Huda


Abstract- A biodegradable film was prepared from a blend of duck feet gelatin and polyvinyl alcohol (PVA) and was plasticized by glycerol. The effects of using a different ratio of duck feet gelatin to PVA (A=0:100, B=20:80, C=40:60, D=60:40, E=20:80, and F=100:0) on the quality properties were examined, including an analysis of thickness, tensile strength, elongation at breaking point and surface color. The gelatin extracted from duck feet had a bloom value of 306.9 g. The tensile strength of the films increased as the concentration of the duck feet gelatin increased. However, the percentage of elongation at breaking point decreased, as tensile strength and elongation at breaking point have an inversely proportional relationship. The film made from pure gelatin had a low lightness value (95.13) compared to a sample without gelatin that had a lightness value of 96.91. The blended film with the ratio of duck feet gelatin to PVA (40:60) showed good properties for use as a biodegradable film compared to blended films with other ratios.


Keywords- Duck feet, biodegradable film, bloom value, tensile strength and surface color.


American Society for Testing and Materials (ASTM). 2003. Standard Test Methods for Tensile Properties of Thin Plastic Sheeting. Standard Designation: D882. In Annual Book of American Standards Testing Methods; ASTM: Philadelphia, PA, USA.

Arvanitoyannis, I., Nakayama, A., and Aiba, S. 1998. Chitosan and gelatin based edible films: state diagrams, mechanical and permeation properties. Carbohydrate Polymers, 37: 371–382

Bourtoom, T. 2009. Review article. Edible protein films: Properties enhancement. International Food Research Journal, 16: 1 –9.

Carvalho, R., Maria, T. M. C., Moraes, I. C. F., Bergo, P. V. , Kamimura, E. S., Habitante, M. Q. B. and Sobral, P. J. 2009. Study of some physical properties of biodegradable films based on blends of gelatin and poly(vinyl alcohol) using a response-surface methodology. Materials Science and Engineering: C, 29(2), 485–491.

Chambi, H., and Grosso, C. 2006. Edible films produced with gelatin and casein cross-linked with transglutaminase. Food Research International, 39 (4): 458-466

Chiellini, E., Cinelli, P., Corti, A. and Kenawy, E. R. 2001. Composite films based on waste gelatin: thermal–mechanical properties and biodegradation testing. Polymer Degradation and Stability, 73 (3):549-555

Cuq, B., Aymard, C., Cuq, J.-L. and Guilbert, S. 1995. Edible packaging films based on fish myofibrillar proteins: Formulation and functional properties. Journal of Food Science, 60: 1369–1374

Gomez-Guillen, M. C., Gimenez, B., Lopez-Caballero, M. E. and Montero, M. P. 2011. Functional and bioactive properties of collagen and gelatine from alternative sources: A review. Food Hydrocolloids, 25: 1813-1827.

Gudmundsson, M. 2002. Rheological properties of fish gelatins. Journal of Food Science 67: 2172-2176.

Johnston-Bank, F. A. 1983. From Tannery to Table: An Account of Gelatin Production. Journal of the Society of Leather Technologists and Chemists, 68: 141– 145.

Johnston-Banks, F. A. 1990. Gelatin. In Harris, P. (Ed.), Food Gels. London: Elsevier Applied Food Science Series, 150 pp.

Kaewprachu, P., and Rawdkuen, S. 2014. Mechanical and physico - chemical properties of biodegradable protein- based films : A comparative study, 2(1): 15–30.

Kim, H.W., Park, J. H., Yeo, E. J., Hwang, K. E., Song, D. H., Kim, Y. J., Ham, Y. K., Jeong, T. J., Choi, Y. S., and Kim, C. J. 2014. Effect of duck feet gelatin concentration on physicochemical, textural and sensory properties of duck meat jellies. Korea Journal of Food Science, 34 (3): 387-394

Kowalczyk, D., and Baraniak, B. 2011. Effects of plasticizers, pH and heating of film-forming solution on the properties of pea protein isolate films. Journal of Food Engineering, 105(2): 295–305.

Liu, D.C., Lin Y.K. and Chen M.T. 2001. Optimum condition of extracting collagen from chicken feet and its characteristics. Asian-Australasian Journal of Animal Sciences, 14(11): 1638-1644.

Miya, M., Iwamoto, R. and Mima., S. 1984. FTIR study of intermolecular interactions in polymer blends. Journal of Polymer Science B, 22: 1149–1151

Montero, P. 2009. Physico-chemical and film-forming properties of bovine-hide and tuna-skin gelatin : A comparative study. Journal of Food Engineering, 90(4): 480–486.

Moraes, I. C. F., Carvalho, R., Bittante, A. M. Q. B., Solorza-Feria, J. and Sobral, P. J. 2009. Film forming solutions based on gelatin and poly(vinyl alcohol) blends: Thermal and rheological characterizations. Journal of Food Engineering, 95: 588–596.

Muyonga, G. H., Cole, C.G.B. and Duodu. K. G. 2004. Characterisation of acid soluble collagen from skins of young and adult Nile perch (Lates niloticus). Food Chemistry, 85 (1): 81–89

Rahman, M. N. A. and Shariffah, A. S. K. A. J. 2012. Extractions, physicochemical characterizations and sensory quality of chicken feet gelatin. Borneo Science, 30:1-13.

Park, S.Y., Jun, S.T. and Marsh,. K.S. 2001. Physical properties of PVOH/chitosan-blended films cast from different solvents. Food Hydrocolloids, 15 (4-6):499-502.

Peressini, D. 2003. Starch–methylcellulose based edible films: rheological properties of film-forming dispersions. Journal of Food Engineering, 59: 25-32.

Pranoto, Y., Salokhe, V. M. and Rakshit S. K. 2005. Physical and antibacterial properties of alginate-based edible film incorporated with garlic oil. Food Research International, 38: 267–272.

Tharanathan, R. 2003. Biodegradable films and composite coatings: past, present and future. Trends in Food Science & Technology, 14(3): 71–78.

Wangtueai S and Noomhorm A. 2009. Processing optimization and characterization of gelatin from lizardfish (Saurida spp.) scales. Food Science and Technology, 42: 825–34.

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