[18p-E214-1~13] 22.1 Joint Session M "Phonon Engineering"

[18p-E214-10] Control of Orientation of the CNT to Control the Anisotropic Conduction of CNT sheet

〇Tsuyohiko Fujigaya^1,2,3, Ryohei Yamaguchi¹, Masakazu Mukaida⁵, Takao Ishida⁵, Motohiro Tomita⁴, Takanobu Watanabe⁴ (1.Kyushu Univ., 2.WPI-I2CNER, 3.CMS, Kyushu Univ., 4.Waseda Univ., 5.AIST)

Keywords:carbon nanotube, thermoelectric conversion, anisotropy

The large anisotropy of the thermal and electrical conductivities of carbon nanotube (CNT) paper in the in-plane and through-plane directions, which arises from the one-dimensional fibrous structure of CNTs, is an issue when a temperature gradient is required for the applications, such as thermoelectric conversion, using the Seebeck effect. To control the orientation of the CNTs, polymer particles are introduced upon paper formation through the vacuum filtration method. The thermal and electrical conductivities in the in-plane direction are decreased as the amount of polymer particles used for the paper formation is increased, while those in the through-plane direction are increased. Heat diffusion in the paper is monitored by an infrared (IR) camera, and a larger temperature gradient is observed for the CNT paper with anisotropy control compared with the original paper without anisotropy control.