Bio-Based Plastic Based on Ozonated Cassava Starch Produced by Extrusion

Author(s)

La Fuente, Carla I. A. ; do Val Siqueira, Larissa ; Augusto, Pedro Esteves Duarte ; Tadini, Carmen C.

• Document type: Journal article
• Source: JOURNAL OF POLYMERS AND THE ENVIRONMENT; v. N/A, p. 11-pg., 2022-06-09.

Abstract

Green methods of modification, such as ozone, can bring new functionalities to starch. In this study, starch-based plastics were produced by extrusion, using cassava starch ozonated with a gas flow of 1 L min(-1) at a concentration of 41 mg O-3 L-1 resulting in doses of 78.9 and 145.3 mg O-3/g starch. Pre-mixes (starch, glycerol, and water) were processed in a co-rotating twin-screw extruder. The main results showed that ozonated sheet produced with the treatment of 78.9 mg O-3/g starch resulted in an increase in Young Modulus by 43% and a decrease in hydrophilicity by 37% in comparison to the native one. Conversely, treatment with 145.3 mg O-3/g starch did not increase the bio-based plastic mechanical properties or surface characteristics, showing a specific behavior tendency between ozonation and extrusion processes. The ozonation of starch showed to be an alternative for producing by extrusion bio-based plastics with enhanced properties, by selecting adequate processing conditions. [GRAPHICS] (AU)

• FAPESP's process: 17/05307-8 - Ozone-modified cassava starch to produce biodegradable films
• Grantee: Carla Ivonne La Fuente Arias
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 19/21700-7 - Mathematical modeling and experimental validation of an extrusion process to produce biodegradable cassava starch pellets
• Grantee: Larissa do Val Siqueira
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 16/12385-2 - Development of low density polymer films for smart packaging
• Grantee: Carmen Cecilia Tadini
• Support Opportunities: Multi-user Equipment Program