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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.)

Covalent functionalization of MWCNT with PHBV chains: Evaluation of the functionalization and production of nanocomposites

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Autor(es):
Amaral Montanheiro, Thais L. [1] ; Montagna, Larissa Stieven [1] ; Barros Machado, Joao Paulo [2] ; Lemes, Ana Paula [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Fed Univ Sao Paulo UNIFESP, Inst Sci & Technol, Technol Lab Polymers & Biopolymers, Talim 330, BR-12231280 Sao Jose Dos Campos, SP - Brazil
[2] Natl Inst Space Res INPE, Associated Lab Sensors & Mat LAS, CP 515, BR-12245970 Sao Jose Dos Campos, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Polymer Composites; v. 40, n. 1, p. 288-295, JAN 2019.
Citações Web of Science: 4
Resumo

Multi-walled carbon nanotubes (MWCNT) were covalently functionalized with poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) chains, through esterification reaction. Thereunto, pristine MWCNT (P-MWCNT) were oxidized (MWCNT-COOH) and posteriorly reduced (MWCNT-OH). MWCNT-OH were used to produce MWCNT functionalized with PHBV chains (MWCNT-PHBV). All functionalized MWCNT were used to produce PHBV nanocomposites films with 0.5 wt% by solution casting. Functionalization was evaluated by Raman spectroscopy and thermogravimetry (TGA), and nanocomposites were characterized by X-Ray Diffraction and contact angle measurements. Results showed that functionalization with PHBV chains was successfully performed and that the polymer chains were attached to MWCNT surface, as expected. I-G/I-D ratio obtained from Raman curves was reduced from 1.34 to P-MWCNT to 0.90 to MWCNT-PHBV. TGA confirmed the presence of PHBV on MWCNT surface, showing a peak at 236 degrees C on the first derivative curve. Crystallite size of PHBV on 020 plane was 11% larger with introduction of MWCNT in nanocomposites. Contact angle was increased with the introduction and functionalization of MWCNT. POLYM. COMPOS., 40:288-295, 2019. (c) 2017 Society of Plastics Engineers (AU)

Processo FAPESP: 13/27064-9 - Utilização de nanocristais de celulose na produção de nanocompósitos poliméricos para aplicações na área médica
Beneficiário:Ana Paula Lemes
Linha de fomento: Auxílio à Pesquisa - Regular