Covalently gamma-aminobutyric acid-functionalized carbon nanotubes: improved compatibility with PHBV matrix

Autor(es)

do Amaral Montanheiro, Thais Larissa ^[1] ; Canuto de Menezes, Beatriz Rossi ^[1] ; Ribas, Renata Guimaraes ^[1] ; Montagna, Larissa Stieven ^[2] ; Bastos Campos, Tiago Moreira ^[1] ; Schatkoski, Vanessa Modelski ^[1] ; Nieto Righetti, Victor Augusto ^[1] ; Passador, Fabio Roberto ^[2] ; Thim, Gilmar Patrocinio ^[1]

Afiliação do(s) autor(es)

^[1] ITA, Lab Plasmas & Processos LAB LPP, Sao Jose Dos Campos - Brazil

^[2] Univ Fed Sao Paulo, Unifesp, Lab Tecnol Polimeros & Biopolimeros TecPBio, Sao Jose Dos Campos - Brazil

• Tipo de documento: Artigo Científico
• Fonte: SN APPLIED SCIENCES; v. 1, n. 10 OCT 2019.
• Citações Web of Science: 0

Resumo

The improvement of compatibility between carbon nanotubes (CNTs) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was achieved using CNT functionalized with y-aminobutyric acid (GABA). The efficiency of the CNT functionalization with GABA was evaluated by X-ray photoelectron spectroscopy (XPS), infrared spectroscopy (FT-IR), Raman spectroscopy, and transmission electron microscopy (TEM). The PHBV/CNT nanocomposites were produced in the molten state with the addition of 0.5 wt% of CNT (pristine, oxidized and functionalized with GABA) and characterized concerning the Izod impact strength tests. The impact fracture morphologies were analyzed using scanning electron microscopy. The results showed that GABA was covalently attached to CNT, resulting in the detection of nitrogen in the XPS survey, the shift of carbonyl peak wavelength on FT-IR, and a higher degree of structural disorder, detected by Raman and observed in TEM images. The impact strength was not significantly affected by the introduction of CNT; however, the impact fracture mechanism was changed from fragile to ductile when CNT was functionalized with GABA. These results are promising for the production of environmentally friendly nanocomposites with superior properties. {[}GRAPHICS] . (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
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 18/12035-7 - Propriedades mecânicas e antimicrobianas de nanocompósito Ag/PMMA
• Beneficiário: Gilmar Patrocínio Thim
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 17/27079-7 - Reforço de um cimento de wollastonita (CaSiO3) por nanotubos de carbono para aplicações biomédicas ou odontológicas
• Beneficiário: Renata Guimarães Ribas
• Linha de fomento: Bolsas no Brasil - Doutorado
• 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
• Linha de fomento: Auxílio à Pesquisa - Regular