Authors:J. Zeng, J. Zhang, Y. Liu, Z. Cao, Z. Zhang, F. Xu, and L. Sun
Polyaniline (PANI)/1-tetradecanol (TD) composite materials, a kind of novel composite that can conduct electricity and store
thermal energy at the same time, thus possess the ability to endure certain heat shock, were prepared for the first time.
FTIR and XRD results showed that there were some interactions existed between PANI and TD. The thermal stability of the composites
exhibited both the characteristics of PANI and TD. The DSC experiments showed that the highest phase change enthalpy of the
composites could be as 73% as that of TD, indicating it was a good form-stable phase change material. The thermal conductivity
of the composites was also improved. The AC (Alternating Current) conductivity of the composites was enhanced to close to
that of PANI when the mass fraction of PANI in the composite was increased to 46%. Heat shock experiments showed that the
heat shock resistibility of the composite was greatly improved comparing to that of pure PANI.
Thermal transporting properties of electrically conductive polyaniline films were first investigated in wide range of temperatures
above room temperature as organic thermoelectric materials. Thermal conductivities of various protonic acid-doped polyaniline
films were measured by combination of a laser flash method and a differential scanning calorimeter in relation with electrical
conductivity and a kind of dopant. The thermal conductivities thus measured are in the range of conventional organic polymers,
indicating that the doped polyaniline films have extremely low thermal conductivities among electrically conductive materials,
and have correlation with neither electrical conductivity, nor a kind of dopant. Consequently the polyaniline film, which
shows very high electrical conductivity, has comparable thermoelectric figure-of-merit (ZT) with feasible inorganic thermoelectric materials such as iron silicide.