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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Amaral Montanheiro, Thais L. [1] ; Montagna, Larissa Stieven [1] ; Barros Machado, Joao Paulo [2] ; Lemes, Ana Paula [1]
Total Authors: 4
[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
Total Affiliations: 2
Document type: Journal article
Source: Polymer Composites; v. 40, n. 1, p. 288-295, JAN 2019.
Web of Science Citations: 4

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)

FAPESP's process: 13/27064-9 - Utilization of cellulose nanocrystals in the production of polymer nanocomposites for applications in the medical area
Grantee:Ana Paula Lemes
Support type: Regular Research Grants