Journal
MATERIALS
Volume 6, Issue 8, Pages 3171-3193Publisher
MDPI
DOI: 10.3390/ma6083171
Keywords
hybrid composites; IF-WS2 nanoparticles; poly(phenylene sulphide); porosity thermomechanical properties; synergistic effects
Categories
Funding
- Ministerio de Ciencia e Innovacion (MICINN) [MAT2010-21070-C02-01]
- Ministerio de Economia y Competitividad (MINECO)
- Consejo Superior de Investigaciones Cientificas (CSIC)
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Carbon fiber (CF)-reinforced high-temperature thermoplastics such as poly(phenylene sulphide) (PPS) are widely used in structural composites for aerospace and automotive applications. The porosity of CF-reinforced polymers is a very important topic for practical applications since there is a direct correlation between void content and mechanical properties. In this study, inorganic fullerene-like tungsten disulphide (IF-WS2) lubricant nanoparticles were used to manufacture PPS/IF-WS2/CF laminates via melt-blending and hot-press processing, and the effect of IF-WS2 loading on the quality, thermal and mechanical behaviour of the hybrid composites was investigated. The addition of IF-WS2 improved fiber impregnation, resulting in lower degree of porosity and increased delamination resistance, compression and flexural properties; their reinforcement effect was greater at temperatures above the glass transition (T-g). IF-WS2 contents higher than 0.5 wt % increased T-g and the heat deflection temperature while reduced the coefficient of thermal expansion. The multiscale laminates exhibited higher ignition point and notably reduced peak heat release rate compared to PPS/CF. The coexistence of micro-and nano-scale fillers resulted in synergistic effects that enhanced the stiffness, strength, thermal conductivity and flame retardancy of the matrix. The results presented herein demonstrate that the IF-WS2 are very promising nanofillers to improve the thermomechanical properties of conventional thermoplastic/CF composites.
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