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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.)

Influence of CNT pre-dispersion into PHBV/CNT nanocomposites and evaluation of morphological, mechanical and crystallographic features

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Author(s):
Montanheiro, T. L. A. [1] ; Campos, Tiago M. B. [1] ; Montagna, L. S. [2] ; da Silva, A. P. [2] ; Ribas, R. G. [1] ; de Menezes, Beatriz R. C. [1] ; Passador, F. R. [2] ; Thim, G. P. [1]
Total Authors: 8
Affiliation:
[1] Inst Tecnol Aeronaut, Lab Plasmas & Processos, Sao Jose Dos Campos, SP - Brazil
[2] Univ Fed Sao Paulo, Lab Tecnol Polimeros & Biopolimeros, Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: MATERIALS RESEARCH EXPRESS; v. 6, n. 10 OCT 2019.
Web of Science Citations: 0
Abstract

In this work, a new strategy of carbon nanotubes (CNT) pre-dispersion (PD) in acetone to produce poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)/CNT nanocomposites was evaluated. PHBV/CNT nanocomposites were produced in the molten state with the addition of 0.5 wt% of CNT and evaluated by scanning electron microscopy with field emission gun (FEG-SEM), differential scanning calorimetry (DSC), Izod impact tests, nanohardness, and x-ray diffraction (XRD). FEG-SEM showed well-dispersed CNT for sample subjected to pre-dispersion (PHBV/CNT-PD), and DSC showed a reduction in the degree of crystallinity from 62% to neat PHBV to 55% for PHBV/CNT-PD. Impact resistance was positively affected by the pre-dispersion, and nanohardness showed more homogeneous values for PHBV/CNT-PD sample compared to PHBV/CNT(without pre-dispersion). XRD proved that hot pressing affects plans orientation, and so does the addition of CNT into PHBV. The CNT dispersion into PHBV analyzed by the ratio between planes area showed that PHBV/CNT-PD sample had homogeneously dispersed CNT. (AU)

FAPESP's process: 17/24873-4 - PHBV and hydroxybutyrate functionalized CNT nanocomposite: kinetic study of crystallization and correlation with mechanical properties
Grantee:Thaís Larissa do Amaral Montanheiro
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 18/12035-7 - Mechanical and antimicrobial properties of Ag/PMMA nanocomposite
Grantee:Gilmar Patrocínio Thim
Support Opportunities: Regular Research Grants
FAPESP's process: 16/19978-9 - Development of PA6/LLDPE blend-based carbon black nanocomposites for antistatic packaging for electronic components
Grantee:Fabio Roberto Passador
Support Opportunities: Regular Research Grants