Díez-Pascual Ana M, Naffakh Mohammed
Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), Juan de la Cierva 3, 28006 Madrid, Spain.
Universidad Politécnica de Madrid, Departamento de Ingeniería y Ciencia de los Materiales, Escuela Técnica Superior de Ingenieros Industriales, José Gutiérrez Abascal 2, 28006 Madrid, Spain.
Materials (Basel). 2013 Jul 26;6(8):3171-3193. doi: 10.3390/ma6083171.
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). IF-WS₂ contents higher than 0.5 wt % increased T 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.
碳纤维（CF）增强的高温热塑性塑料，如聚苯硫醚（PPS），广泛应用于航空航天和汽车领域的结构复合材料。CF增强聚合物的孔隙率是实际应用中一个非常重要的课题，因为孔隙含量与机械性能之间存在直接关联。在本研究中，采用无机富勒烯状二硫化钨（IF-WS₂）润滑纳米颗粒，通过熔融共混和热压工艺制备PPS/IF-WS₂/CF层压板，并研究了IF-WS₂含量对混杂复合材料质量、热性能和力学性能的影响。IF-WS₂的添加改善了纤维浸渍效果，导致孔隙率降低，抗分层性、压缩性能和弯曲性能提高；在高于玻璃化转变温度（T）时，它们的增强效果更显著。IF-WS₂含量高于0.5 wt%时，提高了T和热变形温度，同时降低了热膨胀系数。与PPS/CF相比，多尺度层压板具有更高的燃点，且峰值热释放速率显著降低。微米级和纳米级填料的共存产生了协同效应，增强了基体的刚度、强度、热导率和阻燃性。本文给出的结果表明，IF-WS₂是改善传统热塑性/CF复合材料热机械性能的非常有前景的纳米填料。
