期刊
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
卷 32, 期 1, 页码 62-75出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0892705717744827
关键词
Multiwalled carbon nanotubes; buckypaper; poly(ether-imide); thermal decomposition; Ozawa-Wall-Flyn model
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [502211/2014-8]
- Sao Paulo Research Foundation
Poly(ether-imide) (PEI)-based composites filled with multiwalled carbon nanotubes in a dispersed form (1.0 wt%) and as buckypaper (BP) (25 wt%) have been prepared by mixing solution and hot compression molding technique, respectively. Vacuum filtration technique with the aid of water-based surfactant Triton X-100 was employed to produce BP sheets. The thermal stability of the composites was evaluated by thermogravimetric analysis and revealed a strong increase in thermal degradation temperature when BPs were used as nanofiller. Ozawa-Wall-Flyn model was used to determine the kinetic parameters. It was observed an increase in activation energy as the nanotubes concentration rise, suggesting the formation of more thermally stable systems. In addition, half-life time as function of temperature demonstrated that BP-based composites could operate for 3200 years at 200 degrees C. These results concluded that carbon nanotube BP could contribute to improve significantly the thermal stability of PEI matrix.
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