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PHBV/MWCNT Films: Hydrophobicity, Thermal and Mechanical Properties as a Function of MWCNT Concentration

1
Federal University of São Paulo, Institute of Science and Technology, Technology Laboratory of Polymers and Biopolymers, São José dos Campos, SP 12.231-280, Brazil
2
State University of Campinas, Institute of Chemistry, Biological Chemistry Laboratory, Campinas, SP 13.083-970, Brazil
3
Technological Institute of Aeronautics, Division of Fundamental Sciences, Laboratory of Plasmas and Process, São José dos Campos, SP 12.228-900, Brazil
4
Federal University of ABC, Center of Natural and Human Science, Santo André, SP 09.210-170, Brazil
*
Author to whom correspondence should be addressed.
J. Compos. Sci. 2019, 3(1), 12; https://doi.org/10.3390/jcs3010012
Received: 20 December 2018 / Revised: 17 January 2019 / Accepted: 21 January 2019 / Published: 23 January 2019
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Abstract

The introduction of multi-walled carbon nanotubes (MWCNTs) into polymer matrixes has been an important tool to alter and improve some properties in polymer nanocomposites, including biodegradable polymers such as poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV). In this work, PHBV nanocomposites with 0.05, 0.50, 1.00, 1.50 and 2.00 wt % of MWCNTs were produced by solvent casting. MWCNT morphology and structure were characterized by Raman spectroscopy, and transmission electron microscopy (TEM). It was observed that MWCNTs have a considerable amount of amorphous carbon (AC) onto their surface and a wide distribution of the tube diameter. MWCNTs act as the nucleating agent in the PHBV matrix, as verified by differential scanning calorimetry (DSC). Thermogravimetric analysis (TGA) showed that thermal stability was not significantly affected. The nanofiller dispersion into the PHBV matrix was not effective for concentrations from 1 wt % according to the micrographs obtained in scanning electron microscopy (SEM). The contact angle was changed with the introduction of MWCNTs, turning the nanocomposites hydrophobic and improving the mechanical tensile properties of the PHBV matrix. View Full-Text
Keywords: PHBV; carbon nanotube; nanocomposite PHBV; carbon nanotube; nanocomposite
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MDPI and ACS Style

Lemes, A.P.; Montanheiro, T.L.A.; da Silva, A.P.; Durán, N. PHBV/MWCNT Films: Hydrophobicity, Thermal and Mechanical Properties as a Function of MWCNT Concentration. J. Compos. Sci. 2019, 3, 12.

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J. Compos. Sci. EISSN 2504-477X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
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