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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.)

Interface adjustment between poly(ethylene terephthalate) and graphene oxide in order to enhance mechanical and thermal properties of nanocomposites

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de Souza, Ziani S. B. [1] ; Pinto, Gabriel M. [2] ; Silva, Giovanna da C. [2] ; Demarquette, Nicole R. [3] ; Fechine, Guilhermino J. M. [2] ; Sobrinho, Mauricio A. M. [1]
Total Authors: 6
[1] Univ Fed Pernambuco, Dept Chem Engn, Recife, PE - Brazil
[2] Univ Prebiteriana Mackenzie, Mackenzie Inst Res Graphene & Nanotechnol MackGra, Sao Paulo - Brazil
[3] Ecole Technol Super, Dept Mech Engn, Montreal, PQ - Canada
Total Affiliations: 3
Document type: Journal article
Source: POLYMER ENGINEERING AND SCIENCE; v. 61, n. 7, p. 1997-2011, JUL 2021.
Web of Science Citations: 0

There is great interest in the use of graphene and derivatives in the production of polymer nanocomposites as it provides improvements in the properties of the materials to which they are associated. Such improvements depend heavily on filler dispersion and the interaction between the nanomaterials and the matrix. This work aimed to study the compatibility of graphene oxide (GO) with a poly(ethylene terephthalate) matrix. For this, graphite was modified using Hummers method, using reaction times of 3 and 6 h. The obtained GO was functionalized with amine, amide, and magnetite groups (FGO). The effects of the oxidation degree, functionalization and concentration of the nanofillers on the dispersion and consequently on the properties of the polymer nanocomposites were evaluated. The nanocomposites were synthesized by the solid-solid deposition method followed by the melt mixing technique. It was observed that lower concentrations of nanofiller associated with the lower degree of oxidation and functionalization improved the interaction of the nanofillers with the matrix, which resulted in better mechanical properties under tensile stresses for strain at break, maximum stress, Young's modulus and toughness. It was also observed that the glass transition and crystallization of nanocomposites increased due to a nucleating effect of the nanofillers. (AU)

FAPESP's process: 18/18055-0 - Investigation of the barriers properties of PET/GO nanocomposites for the packaging industry
Grantee:Giovanna da Cruz Silva
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 18/05440-2 - Mechanical and barrier properties of polymer nanocomposites based on poly(ethyelene terephthalate) - PET and graphene oxide-GO
Grantee:Gabriel Matheus Pinto
Support type: Scholarships in Brazil - Master