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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Cellulose nanocrystal-based poly(butylene adipate-co-terephthalate) nanocomposites covered with antimicrobial silver thin films

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Autor(es):
Ferreira, Filipe V. [1, 2] ; Mariano, Marcos [2] ; Pinheiro, Ivanei F. [1] ; Cazalini, Elisa M. [3] ; Souza, Diego H. S. [4] ; Lepesqueur, Laura S. S. [5] ; Koga-Ito, Cristiane Y. [5] ; Gouveia, Rubia F. [2] ; Lona, Liliane M. F. [1]
Número total de Autores: 9
Afiliação do(s) autor(es):
[1] Univ Campinas UNICAMP, Sch Chem Engn, Campinas, SP - Brazil
[2] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Nanotechnol Natl Lab LNNano, Campinas, SP - Brazil
[3] Technol Inst Aeronaut ITA, Dept Phys, Sao Jose Dos Campos, SP - Brazil
[4] Fed Univ Rio De Janeiro UFRJ, Inst Macromol Prof Eloisa Mano IMA, Rio De Janeiro - Brazil
[5] Sao Paulo State Univ UNESP, Inst Sci & Technol, Dept Biosci & Oral Diag, Sao Jose Dos Campos, SP - Brazil
Número total de Afiliações: 5
Tipo de documento: Artigo Científico
Fonte: POLYMER ENGINEERING AND SCIENCE; v. 59, n. 2, p. E356-E365, MAR 2019.
Citações Web of Science: 1
Resumo

In this study, we reported the preparation and prospective application of the nanocomposites of poly(butylene adipate-co-terephthalate) (PBAT) reinforced with cellulose nanocrystals (CNCs). CNCs were isolated from bleached sugarcane bagasse by acid hydrolysis and functionalized with adipic acid. Nanocomposites were prepared with different concentration of CNCs (0.8, 1.5, and 2.3 wt% CNC) by solution-casting method and then were covered with silver thin film by magnetron sputtering. The results showed that the surface modification increased the degree of crystallinity of nanocrystals from 51% to 56%, decreasing their length and diameter. Moreover, AFM-IR spectroscopy revealed that the modified CNCs were covered by adipic acid molecules, improving the dispersion of nanocrystals in PBAT. Well-dispersed modified CNCs acted as heterogeneous nuclei for crystallization of PBAT, and increased the storage modulus of the polymer by more than 200%. These improvements in thermal and mechanical properties of CNC-based PBAT associated with the decrease of 56% in the Escherichia coli biofilm formation on nanocomposites (antibacterial properties) qualify the CNC/PBAT nanocomposites covered with silver thin films to be used as food packaging. POLYM. ENG. SCI., 59:E356-E365, 2019. (c) 2019 Society of Plastics Engineers (AU)

Processo FAPESP: 16/09588-9 - Funcionalização de nanocristais de celulose para o desenvolvimento de nanocompósitos biodegradáveis PBAT/CNC
Beneficiário:Filipe Vargas Ferreira
Linha de fomento: Bolsas no Brasil - Doutorado