Nanocellulose reinforced starch biocomposite films via tape-casting technique

Autor(es)

Giovana Ladislau Garuti ^[1] ; Roberta Ranielle Matos de Freitas ^[2] ; Vitor Hugo de Lima ^[3] ; Karina Palmizani do Carmo ^[4] ; Franciane Andrade de Pádua ^[5] ; Vagner Roberto Botaro

Afiliação do(s) autor(es)

^[1] Universidade Federal de São Carlos. Laboratório de Materiais Poliméricos e Bioenergia - Brasil

^[2] Universidade Federal de São Carlos. Laboratório de Materiais Poliméricos e Bioenergia - Brasil

^[3] Universidade Federal de São Carlos. Laboratório de Materiais Poliméricos e Bioenergia - Brasil

^[4] Universidade Federal de Ouro Preto. Laboratório de Materiais Poliméricos - Brasil

^[5] Universidade Federal de São Carlos. Laboratório de Materiais Poliméricos e Bioenergia - Brasil

• Tipo de documento: Artigo Científico
• Fonte: POLIMEROS-CIENCIA E TECNOLOGIA; v. 34, n. 1 2024-03-01.

Resumo

Abstract The objective of this study was to characterize the physicochemical-mechanical properties of corn and cassava starch films reinforced with CNF via Tape-Casting. There were differences in size and shape of the starch granules. Corn starch nanocomposites (NCO) showed a significant increase in tensile strength (5.14 to 25.58 MPa) and significant decrease in strain (24.81 to 2.76%) as the CNF concentration increased. Among the cassava starch nanocomposites (NCA), only the cassava starch sample with 1% CNF (NCA-1) showed significant difference both in the maximum stress (4.94 MPa) and strain (15.17%). The corn starch sample with 2% of CNF (NCO-2) presented a lower roughness and NCA-1 a smooth surface. There was no difference in chemical composition between the samples. The CNF-free starch films showed more transparency than other films. The NCA showed more transparency than NCO. Tape-casting technique unveils enhanced mechanical properties of cellulose nanofiber-reinforced starch films. Starch nanocomposites exhibit improved tensile strength and surface characteristics. (AU)

• Processo FAPESP: 16/19896-2 - Estudo do comportamento térmico dinâmico-mecânico de filmes poliméricos de hidrogéis visando a aplicação como futuros materiais biocompatíveis
• Beneficiário: Vagner Roberto Botaro
• Modalidade de apoio: Auxílio à Pesquisa - Regular