Thermal Conductivity for Polymer Composite Materials: Recent Advances in Polyimide Materials

Abstract

Polymer materials have received much attention from a wide range of industrial interests. Functional llers are often introduced to polymers to add new functions that the pristine polymer materials show inferior values. As for thermal conductivity (TC), thermal conductive llers such as ceramics, functional nanocarbons, and metals are often used. Among the polymers used in industrial elds, polyimide (PI) has excellent thermal stability and solvent resistance. However, the TC of PI is low as is often the case in other commonly used polymers. In the present paper, PI-based composite materials were reviewed from the viewpoint of TC. Hexagonal boron nitride, aluminum nitride, graphene, graphene derivatives (graphene oxide, reduced graphene oxide) and carbon nanotubes were the focus as representative thermal conductive llers.

Enhancement of the effective thermal conductivity of iron oxide‐coated hexagonal boron nitride/polyimide composite sheets using samarium–cobalt magnets

“…Polyimide (PI) is a promising engineering plastic with excellent insulation properties, good mechanical strength, and high heat resistance. [9][10][11][12][13] However, it exhibits a low thermal conductivity (TC). To overcome this limitation, fillers with high TC, such as ceramics [14][15][16] and carbon fillers, [17][18][19] have been used.…”

Effect of magnetic field treatment on effective thermal conductivity for polyimide‐based composite sheet using magnetite‐decorated hexagonal boron nitride

“…These materials have shown prominent levels of electrical insulation and heat resistance. Moreover, polyimide (PI) has also demonstrated excellent levels of electrical insulation and heat resistance, and many studies on the k of PI‐based composites have been reported 12 …”

“…Moreover, polyimide (PI) has also demonstrated excellent levels of electrical insulation and heat resistance, and many studies on the k of PI-based composites have been reported. 12 In filler/polymer composites, a high content of fillers is generally required to achieve a remarkable increment of k. However, a high content of fillers sometimes deteriorates particular polymer properties such as flexibility. Therefore, the use of smaller amounts of fillers to enhance k is generally desirable.…”