Developing rigid gliadin based biocomposites with high mechanical performance |
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| Affiliation: | 1. KU Leuven Department of Materials Engineering, Kasteelpark Arenberg 44, 3001 Leuven, Belgium;2. KU Leuven Laboratory of Food Chemistry and Biochemistry, and Leuven Food Science and Nutrition Research Centre (LFoRCe), Kasteelpark Arenberg 20, 3001 Leuven, Belgium;3. KU Leuven Chemistry Department, Polymer Chemistry and Materials Division, Celestijnenlaan 200F, 3001 Leuven, Belgium;4. KU Leuven Department of Chemical Engineering, Soft Matter, Applied Rheology and Technology, Willem de Croylaan 46, 3001 Leuven, Belgium;1. Department of Materials Engineering, K. U. Leuven, Kasteelpark Arenberg 44, 3001 Leuven, Belgium;2. Department of Architecture, Built Environment and Construction Engineering, Politecnico di Milano, Piazza Leonardo Da Vinci 32, 20133 Milan, Italy;3. Institute of Architecture of Textile, Technical University of Lodz, Zeromskiego 116, 90-924 Lodz, Poland;1. Department of Chemical Engineering Materials Environment, Sapienza-Università di Roma and UDR INSTM, Via Eudossiana 18, 00184 Roma – Italy;2. Department of Mechanical and Aerospace Engineering, Sapienza-Università di Roma, Via Eudossiana 18, Roma - Italy |
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| Abstract: | We aim to produce unidirectional fiber composites with high mechanical performance based on flax fibers and a rigid gliadin matrix. As a fraction from wheat gluten, gliadin is soluble in alcohol containing media. The fabrication process did not involve any further solvents or plasticizers. Finally, samples were cooled at different rates. Overall, the cooling rate does not strongly affect the mechanical properties although slowly cooled materials contain a higher amount of non-disulfide cross-links, next to disulfide bonds within the gliadin matrix. At 40% fiber volume fraction, flax/gliadin composites with a flexural modulus and strength of respectively 21.5 GPa and 240 MPa were obtained when loaded in the longitudinal direction. These high values demonstrate that in this composite fabrication process, a good impregnation of the polymer matrix in between the fiber bundles has been achieved. However, the fiber–matrix adhesion, as measured by transverse flexural and tensile tests, was still relatively modest. |
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| Keywords: | A Polymer-matrix composites (PMCs) A Gliadin B Mechanical properties E Powder processing |
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