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

Autor(es)

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

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF POLYMERS AND THE ENVIRONMENT; v. N/A, p. 11-pg., 2022-06-09.

Resumo

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)

• Processo FAPESP: 17/05307-8 - Modificação de amido de mandioca por oxidação com ozônio para a elaboração de filmes biodegradáveis
• Beneficiário: Carla Ivonne La Fuente Arias
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 19/21700-7 - Modelagem matemática e validação experimental do processo de extrusão na produção de filme biodegradável de amido de mandioca
• Beneficiário: Larissa do Val Siqueira
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 16/12385-2 - Desenvolvimento de polímero linear de baixa densidade para aplicação como embalagem inteligente
• Beneficiário: Carmen Cecilia Tadini
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários