16:00 〜 18:00
▲ [16p-P16-3] Thermoelectric characterization of carbon nanotube curable resin
キーワード：Thermoelectric conversion, Carbon nanotube, Curable resin
Polymer composites with carbon nanotubes (CNTs) are a promising thermoelectric (TE) material, due to its high electrical conductivity of the CNTs together with the low thermal conductivity of the polymer. Previously, we reported that the single-walled carbon nanotubes (SWNTs) can be homogeneously embedded in the resin matrix (R712) and the thermal conductivity of SWNTs has severely suppressed, which suggest that the composite (SWNT/R712) is a potential TE material [1]. In this work, we fabricated the CNT composite films (CNT/R712) with 3 types of CNTs and evaluated their TE properties.
HiPco (SWNTs, Unidym) were added to R712 and mixed by tip homogenizer (Polytron, central science trade), bead mill homogenizer (Tube drive VT-1, AS ONE), and tube homogenizer (Tube drive VT-1, AS ONE), respectively, for 30 min, 4000 rpm. The obtained pastes were further mixed after adding 1 wt % of photo-initiator (IRGACURE819) and then, degassed for 10 min by conditioning mixer (THINKY) at 2200 rpm. The pastes poured into the molds (50 µm in depth) were exposed to UV light (high pressure Hg lamp, SEN, LIGHTS CORP.) for 4 min to initiate the curing reaction to afford HiPco/R712 films.
HiPco, eDIPS (SWNTs, Meijo) and multi-walled carbon nanotubes (MWNTs, Nikkiso) were used as CNTs in the same fashion (as above) to prepare HiPco/R712, eDIPS/R712 and MWNT/R712 films by tube homogenizer. The TE properties of the 3 films were evaluated by ZEM-3 (ADVANCE RIKO)
We found that the film prepared by the tube homogenizer demonstrates the best dispersibility, as clearly indicated by its back color.[2] Indeed, surface resistivity measurements revealed the film c showed a lower resistance value (4.46×104 Ω/sq.) than the films prepared by tip homogenizer and bead mill homogenizer, respectively (>107 Ω/sq.), which proves the tube homogenizer is a suitable dispersing method. This method takes less time and can be carried out in a larger scale than sonication, while still keeping a high dispersibility. We also applied this condition to prepare HiPco/R712, eDIPS/R712 and MWNT/R712 films and measured their TE properties. eDIPS/R712 film illustrates the highest ZT value, due to the high electrical conductivity and Seebeck coefficient. Since CNT/R712 was viscous solution before curing reaction, we can expect the printable fabrication of integrated TE device with this material
[1] T. Fujigaya, T. Fukumaru, and N. Nakashima, Synth. Met., 2009, 159, 827-830.
[2] W. Huang, N. Nakashima and T. Fujigaya, Chem. Lett., 2016, 45 (8), .875-877
HiPco (SWNTs, Unidym) were added to R712 and mixed by tip homogenizer (Polytron, central science trade), bead mill homogenizer (Tube drive VT-1, AS ONE), and tube homogenizer (Tube drive VT-1, AS ONE), respectively, for 30 min, 4000 rpm. The obtained pastes were further mixed after adding 1 wt % of photo-initiator (IRGACURE819) and then, degassed for 10 min by conditioning mixer (THINKY) at 2200 rpm. The pastes poured into the molds (50 µm in depth) were exposed to UV light (high pressure Hg lamp, SEN, LIGHTS CORP.) for 4 min to initiate the curing reaction to afford HiPco/R712 films.
HiPco, eDIPS (SWNTs, Meijo) and multi-walled carbon nanotubes (MWNTs, Nikkiso) were used as CNTs in the same fashion (as above) to prepare HiPco/R712, eDIPS/R712 and MWNT/R712 films by tube homogenizer. The TE properties of the 3 films were evaluated by ZEM-3 (ADVANCE RIKO)
We found that the film prepared by the tube homogenizer demonstrates the best dispersibility, as clearly indicated by its back color.[2] Indeed, surface resistivity measurements revealed the film c showed a lower resistance value (4.46×104 Ω/sq.) than the films prepared by tip homogenizer and bead mill homogenizer, respectively (>107 Ω/sq.), which proves the tube homogenizer is a suitable dispersing method. This method takes less time and can be carried out in a larger scale than sonication, while still keeping a high dispersibility. We also applied this condition to prepare HiPco/R712, eDIPS/R712 and MWNT/R712 films and measured their TE properties. eDIPS/R712 film illustrates the highest ZT value, due to the high electrical conductivity and Seebeck coefficient. Since CNT/R712 was viscous solution before curing reaction, we can expect the printable fabrication of integrated TE device with this material
[1] T. Fujigaya, T. Fukumaru, and N. Nakashima, Synth. Met., 2009, 159, 827-830.
[2] W. Huang, N. Nakashima and T. Fujigaya, Chem. Lett., 2016, 45 (8), .875-877