Progress on thermal conductivity models of carbon nanotube polymer composites

Thermal conductivity models of polymer matrix carbon nanotube composites are reviewed. The mechanism of carbon nanotubes (CNTs) as filler in composite thermal conduction system is analyzed. The mixed rule, homogeneous, effective medium, heterogeneous, random dispersion models as well as the calculation methods commonly used in thermal conduction are summarized. These models enrich the thermal conductivity theory and can make preliminary predictions of the thermal conductivity of composites, but there are approximate or simplified treatments in terms of numerical values. The prediction of carbon nanotube polymer composites cannot be used widely. In the future, the key factors affecting thermal conductivity, such as molecular size and interfacial thermal resistance, need to be further explored, and numerical and characterization analysis methods should be improved. This review provides a reference for research and design of thermal conductivity property of carbon nanotube polymer composites and other composites. © 2020, Editorial Office of FINE CHEMICALS. All right reserved.