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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.)

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

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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]
Total Authors: 9
[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
Total Affiliations: 2
Document type: Journal article
Source: SN APPLIED SCIENCES; v. 1, n. 10 OCT 2019.
Web of Science Citations: 0

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)

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 type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 18/12035-7 - Mechanical and antimicrobial properties of Ag/PMMA nanocomposite
Grantee:Gilmar Patrocínio Thim
Support type: Regular Research Grants
FAPESP's process: 17/27079-7 - Reinforcement of a wollastonite cement (CaSiO3) by carbon nanotubes for biomedical or dental applications
Grantee:Renata Guimarães Ribas
Support type: Scholarships in Brazil - Doctorate
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 type: Regular Research Grants