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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.)

Hybrids nanocomposites based on a polymer blend (linear low-density polyethylene/poly(ethylene-co-methyl acrylate) and carbonaceous fillers (graphene and carbon nanotube)

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Author(s):
Nunes, Mario A. B. S. [1] ; de Matos, Bruno R. [2] ; Silva, Glaura G. [3] ; Ito, Edson N. [4] ; de Melo, Tomas J. A. [1] ; Fechine, Guilhermino J. M. [5]
Total Authors: 6
Affiliation:
[1] Univ Fed Campina Grande, Dept Mat Engn, BR-58429900 Campina Grande, Paraiba - Brazil
[2] Nucl & Energy Res Inst, Hydrogen Fuel Cells Ctr, Sao Paulo, SP - Brazil
[3] Univ Fed Minas Gerais, Ctr Technol Nanomat & Graphene, Belo Horizonte, MG - Brazil
[4] Univ Fed Rio Grande do Norte, Dept Mat Engn, Natal, RN - Brazil
[5] Univ Prebiteriana Mackenzie, Mackenzie Inst Res Graphene & Nanotechnol MackGra, BR-01302907 Sao Paulo, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Polymer Composites; v. 42, n. 2 OCT 2020.
Web of Science Citations: 0
Abstract

Interfacial or separate phase location of carbonaceous nanofillers (graphene and carbon nanotubes) in polymer blends with co-continuous phases can lead to double percolation behavior, significantly increasing rheological and electrical properties. The prediction of the morphology and the location of the nanofillers has been used as a tool to evaluate the proprieties of co-continuous polymer blends. This work aims to highlight the superior conductivity levels achieved using a low amount of carbon-based fillers, by the proper selection in a multiphase polymer matrix as a template for controlled dispersion and spatial distribution of the nanoparticles, offering a compromise between easy processability and enhanced performance. Here, two polymers (linear low-density polyethylene {[}LLDPE] and ethylene-co-methylacrylate {[}EMA]) and their co-continuous blend (LLDPE/EMA) were loaded with nanofillers (few-layer graphene {[}FLG], few-walled carbon nanotube {[}FWCNT]) via continuous melt mixing in twin-screw extrusion, separate and simultaneously. It was observed that the addition of the nanofillers changed the co-continuity of the blend, with the probable migration of the nanofillers from the EMA (hydrophilic) phase to the LLDPE (hydrophobic) phase. Rheological percolation occurred preferentially in blends containing FWCNT and FLG/FWCNT. Electrical conductivity was observed in all compositions, with higher electrical conductivity being noticed in hybrids. (AU)

FAPESP's process: 18/10910-8 - Photodegradation and photostabilization of polymer nanocomposites based on two-dimensional fillers
Grantee:Guilhermino José Macêdo Fechine
Support Opportunities: Regular Research Grants