Abdalrazeq, Manar Ahmad Mohammad (2021) Developing bio-based materials and coatings from whey proteins. [Tesi di dottorato]


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Item Type: Tesi di dottorato
Resource language: English
Title: Developing bio-based materials and coatings from whey proteins
Abdalrazeq, Manar Ahmad Mohammadmanar.abdalrazeq@unina.it
Date: 13 July 2021
Number of Pages: 112
Institution: Università degli Studi di Napoli Federico II
Department: Biologia
Dottorato: Biotecnologie
Ciclo di dottorato: 33
Coordinatore del Corso di dottorato:
Moracci, Marcomarco.moracci@unina.it
Porta, RaffaeleUNSPECIFIED
Sannia, GiovanniUNSPECIFIED
Giosafatto, C. Valeria L.UNSPECIFIED
Pezzella, CinziaUNSPECIFIED
Date: 13 July 2021
Number of Pages: 112
Keywords: Whey proteins, bioplastic, bio based films, bioactive films, Coatings
Settori scientifico-disciplinari del MIUR: Area 05 - Scienze biologiche > BIO/10 - Biochimica
Date Deposited: 22 Jul 2021 16:02
Last Modified: 07 Jun 2023 11:08
URI: http://www.fedoa.unina.it/id/eprint/13629

Collection description

Plastics are inexpensive, lightweight, strong, durable, corrosion-resistant materials, with high thermal and electrical insulation properties. The diversity of polymers and the versatility of their properties are used to make a vast array of products that bring medical and technological advances, energy savings, and numerous other societal benefits. However, the growing production of petroleum-based plastics has incurred disposal issues raising the concerns of plastic pollution and its impact to the environment. These issues have encouraged innovation and research activities in the field of bioplastics, offering alternatives to conventional plastics. One potential option to pursue would be to explore agri-food wastes and by-products for bio-plastic production. In this scenario, the present thesis provides insights into the production and characterization of bio-plastics obtained by using the proteins contained in milk whey, the main by-product derived from cheese production. Even though recycled in different ways, too much whey is wasted in the environment and disposed off illegally. Consequently, there is a significant interest in finding new applications to avoid whey water pollution mostly due to its high content of whey proteins (WPs). In this work we investigated the possibility to use WPs to prepare bio-plastics with improved features. Different experimental conditions, such as i) pH modification, ii) heating treatment, iii) enzymatic treatment, iv) plasticizer addition, and v) blending with nanoparticles (NPs), were exploited in order to modify the technological features of WP-based bio-plastics prepared by casting method. Furthermore, the films showing the best characteristics were also added with bioactive molecules from Pecan (Carya illinoinensis) Nut Shell and Thymbra (Satureja capitata) leaf extracts, both to influence film technological properties and to confer antioxidant and antimicrobial activity to the produced bio-plastics. The results reported in the present thesis suggest a possible use of the obtained WP-based films functionalized with active biomolecules as new environmentally-friendly candidates for food packaging, by preserving the product integrity against mechanical damage and reducing the microbial spoilage.


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