Glycerol-Plasticized Films Obtained from Whey Proteins Denatured at Alkaline pH
| Autor: | Prospero Di Pierro, Maria Fenderico, Marilena Esposito, Manar Abdalrazeq, C. Valeria L. Giosafatto, Raffaele Porta |
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| Přispěvatelé: | Abdalrazeq, MANAR AHMAD MOHAMMAD, Giosafatto, CONCETTA VALERIA LUCIA, Esposito, Marilena, Fenderico, Maria, DI PIERRO, Prospero, Porta, Raffaele |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
biodegradable materials Whey protein animal structures Materials science Globular protein whey Plasticizer Surfaces and Interfaces Polymer Casting Surfaces Coatings and Films protein-based films chemistry.chemical_compound chemistry lcsh:TA1-2040 Materials Chemistry Glycerol Biodegradable plastic lcsh:Engineering (General). Civil engineering (General) Water content Nuclear chemistry |
| Zdroj: | Coatings, Vol 9, Iss 5, p 322 (2019) Coatings Volume 9 Issue 5 |
| Popis: | Whey represents the major by-product of cheese industry. One possibility to recycle the whey wastes is the use of their globular proteins as a polymer source for the production of biodegradable plastic materials. Whey protein (WP)-based films are usually obtained by protein heat treatment in the presence of glycerol (GLY) as plasticizer at pH 7, a method which would require commercially high costing process. In this work we explored the possibility of producing manageable whey-derived materials without any heat-treatment but under alkaline conditions. The reported results demonstrated that the casting at pH 12 of the unheated WP film forming solutions (FFSs), containing either 40% or 50% GLY, led to produce more resistant and flexible materials than the ones obtained at pH 7. Film opacity was observed significantly increased, being higher in the samples obtained at alkaline pH without WP heating and with higher GLY concentrations. Finally, moisture content decreased with the reduction of GLY content, both in heated and unheated WP-based films, whereas water uptake of the different films prepared at pH 12 did not significantly change. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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