The Preparation And Investigation Of PEEK-based Thermal Conductivity Composites

High performance plastic Poly-ether-ether-ketone PEEK, which has many merits that the traditional materials do not have, its application is narrowed because of its low thermal conductivity property. The solution of adding fillers with high thermal conductivity is a possible way. In this work, PEEK-based composites were prepared using kinds of filler and methods to have research on the detailed factors for its influence of material’s property. Expanded graphite EG filling PEEK composites were prepared. Proper ultrasonication time and high shear mixing of the suspension were both favorable for improving its thermal conductivity. The filling loading, the PEEK particle size and using CNT as second more filler were displayed influences on the thermal conductivity of composites. Graphite nanoplatelet (GNP) was prepared through the exfoliation of expanded graphite (EG) by the ultrasonication technique. SEM and Laser accounting revealed that the critical time for the preparation was10h and the prepared GNP owned a diameter of2-5μm and a thickness in the nanoscale. The ultrasonication time, the types of fillers and the filler loading affected on the thermal conductivity of the composite were investigated in detail. The results demonstrated that the thermal conductivity of PEEK matrix can be improved effectively using GNP as filler. The Carbon Fiber CF/PEEK composites were investigated through the wet process, which provided the possibility of the practical broaden application. The additive dispersion agent during the process, the length of fiber and the filling loading show their influences on the improvement of thermal conductivity of composites.