Rheological behaviour and physical properties of controlled-release gluten-based bioplastics |
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| Authors: | D Gómez-Martínez P Partal I Martínez C Gallegos |
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| Institution: | 1. Departamento de Ingeniería Química, Escuela Politécnica Superior, Universidad de Sevilla, 41011, Sevilla, Spain;2. Departamento de Ingeniería Química, Facultad de Química, Universidad de Sevilla, 41012, Sevilla, Spain;1. Department of Fibre and Polymer Technology, Polymeric Materials Division, School of Engineering Sciences in Chemistry, Biotechnology and Health (Formerly, School of Chemical Science and Engineering), KTH Royal Institute of Technology, Stockholm, 10044, Sweden;2. Centre for Advanced Composite Materials, Department of Mechanical Engineering, The University of Auckland, Auckland, New Zealand;3. Department of Plant Breeding, Faculty of Landscape Planning, Horticulture and Crop Production Sciences, Swedish University of Agricultural Sciences, Alnarp, 23053, Sweden;4. Department of Mechanical Engineering, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, Canada;1. Center for Incubation, Innovation, Research and Consultancy, Jyothy Institute of Technology, Thathaguni Post, Bengaluru 560082, India;2. Regional Research Resource Center, Visvesvaraya Technological University, Jnana Sangama, Belagavi 590018, India;1. The New Zealand Institute for Plant & Food Research, Gerald Street, Lincoln, 7608, Christchurch, New Zealand;2. Istituto per i Polimeri, Compositi e Biomateriali (IPCB), Consiglio Nazionale delle Ricerche (CNR), via Campi Flegrei 34, 80078, Pozzuoli Napoli, Italy;3. Istituto per le Macchine Agricole e Movimento Terra (IMAMOTER), Consiglio Nazionale delle Ricerche (CNR), Strada delle Cacce 73, 10135 Torino, Italy;1. Departamento de Ingeniería Química, Universidad de Sevilla, Facultad de Química, Calle Profesor García González 1, 41012, Sevilla, Spain;2. Departamento de Ingeniería Química, Química Física y Química Orgánica, Facultad de Ciencias Experimentales, Universidad de Huelva, Avenida Tres de Marzo, s/n, 21071 Huelva, Spain |
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| Abstract: | Bioplastics based on glycerol, water and wheat gluten have been manufactured in order to determine the effect that mechanical processing and further thermal treatments exert on different thermo-mechanical properties of the biomaterials obtained. An “active agent”, KCl was incorporated in these matrices to develop controlled-release formulations. Oscillatory shear, dynamic mechanical thermal analysis (DMTA), diffusion and water absorption tests were carried out in order to study the influence of the above-mentioned treatments on the physico–chemical characteristics and rheological behaviour of these bioplastic samples. Wheat gluten protein-based bioplastics studied in this work present a high ability for thermosetting modification, due to protein denaturation, which may favour the development of a wide variety of biomaterials. Bioplastic hygroscopic properties depend on plasticizer nature and processing procedure, and may be a key factor for industrial applications where water absorption is required. On the other hand, high water absorption and slow KCl release from bioplastic samples (both of them suitable properties in agricultural applications) may be obtained by adding citric acid to a given formulation, at selected processing conditions. |
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