Development of Pea Protein Bioplastics by a Thermomoulding Process: Effect of the Mixing Stage

Protein-based bioplastics are materials obtained with renewable natural components that present huge benefits as their technological capacity in a wide range of purposes. Besides, pea protein isolate and glycerol seem to be an excellent combination to create new bioplastics due to their fantastic pr...

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Bibliographic Details
Published in:Journal of polymers and the environment 2019-05, Vol.27 (5), p.968-978
Main Authors: Carvajal-Piñero, J. M., Ramos, M., Jiménez-Rosado, M., Perez-Puyana, V., Romero, A.
Format: Article
Language:English
Subjects:
Bioplastics
Chemistry
Chemistry and Materials Science
Environmental Chemistry
Environmental Engineering/Biotechnology
Glycerol
Heterogeneity
Industrial Chemistry/Chemical Engineering
Injection molding
Materials Science
Mechanical properties
Original Paper
Polymer Sciences
Process parameters
Proteins
Rheological properties
Thermomechanical treatment
Water uptake
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Summary:Protein-based bioplastics are materials obtained with renewable natural components that present huge benefits as their technological capacity in a wide range of purposes. Besides, pea protein isolate and glycerol seem to be an excellent combination to create new bioplastics due to their fantastic processability and hydrophilic character. This is achieved by a thermomechanical process of two stages: mixing and injection moulding. The goal of this work is to study the preparation of pea protein-based bioplastics by the evaluation of the influence of the processing stages on the properties of the final bioplastics obtained. These bioplastics were studied evaluating different processing parameters (mixing speed and time) by assessing their influence on the protein-plasticizer blend with the analysis of the microstructure, as well as the rheological and mechanical behaviour. In addition, water uptake tests were also performed. The results showed that short and long mixing times and high mixing speeds (50 rpm) led to heterogeneity. While, intermediate mixing speeds (30 rpm) and short mixing times (1 and 10 min) were found to be suitable to obtain bioplastics with good mechanical properties.
ISSN:1566-2543
1572-8919
DOI:10.1007/s10924-019-01404-3