Thermomechanical properties of multifunctional polymer hybrid nanocomposites based on carbon nanotubes and nanosilica

• Published in: Journal of applied polymer science Vol. 141; no. 41
• Main Authors: Silva, Bruno Milton Oliveira, Fernandes, Nathália Maria Moraes, Barbosa, Juliano Martins, Pinto, Gabriel Matheus, Benega, Marcos Antônio Gimenes, Taha‐Tijerina, José Jaime, Andrade, Ricardo Jorge Espanhol, Ribeiro, Hélio
• Format: Journal Article
• Language: English
• Published: Hoboken, USA John Wiley & Sons, Inc 05-11-2024; Wiley Subscription Services, Inc
• Subjects: Addition polymerization; carbon nanotubes; Epoxy resins; Glass transition temperature; Mechanical properties; Multi wall carbon nanotubes; multifunctional nanocomposites; Nanocomposites; Nanoparticles; nanosilica; Plastic deformation; Polymers; Raman spectroscopy; Storage modulus; Thermal conductivity; thermal properties; Thermal resistance; Thermal stability; Thermodynamic properties; Thermogravimetric analysis; Thermomechanical properties
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.56054

Nanocomposites containing low wt% of oxidized multi‐walled carbon nanotubes (MWCNT‐OXI), nanosilica (NS), and its hybrid (MWCNT‐OXI/NS) in epoxy resin were produced and evaluated. The used nanoparticles were studied by scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and Raman spectroscopy while the nanocomposites were investigated in relation to its morphology, thermal, and mechanical properties. The results demonstrated significant improvements in the storage modulus (E′), glass transition temperature (Tg), and cross link density (CD), for the produced nanocomposites. Increases in thermal conductivity (TC) of up to 85% at 90°C were observed for the nanocomposites containing 1.0 wt% of the hybrid MWCNT‐OXI + NS nanofiller, when compared with neat polymer. It was also verified increases in the resistance to plastic deformation for the nanocomposites, maintained the polymer thermal stability with the addition of these nanoparticles. Finally, the use of MWCNT‐OXI and NS, combined or not, significantly improved the thermal and mechanical properties of polymer, showing multifunctional characteristics for the produced nanocomposites.
Model for the epoxy system containing nanosilica, CNTs and its hybrids nanoparticles. MWCNT‐OXI, multi‐walled carbon nanotubes; NS, nanosilica.