Cross-linked soy protein as material for biodegradable films: Synthesis, characterization and biodegradation
By Agustín González, M. Strumia, C. Igarzabal. 2011
218 citations recorded by the source corpus.
Abstract The modification of soy protein isolate (SPI) with different amounts of a naturally occurring cross-linking agent (genipin, Gen) and glycerol used as plasticizer was carried out in this work. The films yielded were cast from heated and alkaline aqueous solution of SPI, glycerol and Gen and then dried in an oven. Total soluble matter, water vapor permeability and mechanical properties were improved by adding small amounts of Gen. These properties were not significantly affected ( P ⩾ 0.05) by additions exceeding 2.5% (w/w of SPI). The opacity and cross-linking degree were linearly increased with the addition of Gen, whereas the swelling ratios in water were decreased. All the films were submitted to degradation under indoor soil burial conditions and the weight loss of the films was measured at different times. This study revealed that the film biodegradation time can be controlled or modified from at least 14 to 33 days. The tests performed showed the potential of Gen to improve the SPI film properties, in which the possibility of employing such new films as biodegradable food packaging was raised.
Subfields: Biomaterials, Mechanics of Materials
View Paper: https://www.semanticscholar.org/paper/e47223f7c91b6e7a66dd8c29473887fb5d31c818
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In Biomaterials
Citations in the corpus
- State of the Art in the Development and Properties of Protein-Based Films and Coatings and Their Applicability to Cellulose Based Products: An Extensive Review (2015, background): “Biodegradation studies on glycerol plasticized SPI films showed a biodegradation time of at least 14 to 33 days, depending on the film composition [215].”