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

Autor(es)

Amaral Montanheiro, Thais L. ^[1] ; Montagna, Larissa Stieven ^[1] ; Barros Machado, Joao Paulo ^[2] ; Lemes, Ana Paula ^[1]

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

• 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
• Modalidade de apoio: Auxílio à Pesquisa - Regular