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

Autor(es)

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]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS RESEARCH EXPRESS; v. 6, n. 10 OCT 2019.
• Citações Web of Science: 0

Resumo

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)

• Processo FAPESP: 17/24873-4 - Nanocompósito de PHBV e NTC funcionalizado com hidroxibutirato: estudo cinético da cristalização e correlação com as propriedades mecânicas
• Beneficiário: Thaís Larissa do Amaral Montanheiro
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 18/12035-7 - Propriedades mecânicas e antimicrobianas de nanocompósito Ag/PMMA
• Beneficiário: Gilmar Patrocínio Thim
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/19978-9 - Desenvolvimento de nanocompósitos de blendas de PA6/LLDPE e negro de fumo para embalagens antiestáticas para componentes eletrônicos
• Beneficiário: Fabio Roberto Passador
• Modalidade de apoio: Auxílio à Pesquisa - Regular