Fabrication of transparent conductive carbon nanotubes/polyurethane-urea composite films by solvent evaporation-induced self-assembly (EISA) |
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Authors: | Ho Seung Ki Jeong Hyun Yeum Soonja Choe Jung Hyun Kim In Woo Cheong |
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Affiliation: | 1. Kyungpook National University, 1370 Sankyuk-3-dong, Buk-gu, Daegu 702-701, Republic of Korea;2. Inha University, 253 Yonghyun-dong, Nam-gu, Incheon 402-751, Republic of Korea;3. Yonsei University, 262 Seongsanno, Seodaemun-gu, Seoul 120-749, Republic of Korea |
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Abstract: | Transparent and conductive carbon nanotubes (CNTs)/polyurethane-urea (PUU) composite films were prepared by solvent evaporation-induced self-assembly (EISA). Pristine CNTs were treated with acids (H2SO4/HNO3 = 3:1, v:v), acylated with thionyl chloride, and purified after filtration. These acylated CNTs (0.05 wt.% in dimethylformamide, DMF) were deposited onto the 3-aminopropyl triethoxysilane (APTES)-modified glass substrate by DMF EISA at 100 °C with the withdrawal rate of 3 cm/h. The CNT layers of 200–400 nm thicknesses were transferred to the PUU films by solution casting or resin transfer molding (RTM) at ambient temperature. Optical transmittances of the composite films were 60–75% at 550 nm wavelength and their sheet resistances were 5.2 × 100–2.4 × 103 kΩ/square, and which varied significantly with type of CNTs and the transferring methods of CNT layers. |
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Keywords: | A. Carbon nanotubes A. Nano composites B. Electrical properties E. Resin transfer molding (RTM) Evaporation-induced self-assembly |
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