Emergent Bioengineering Materials Research Team , RIKEN Center for Emergent Matter Science (CEMS) , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan.
School of Materials Science and Engineering , Changchun University of Science and Technology , Changchun 130022 , China.
ACS Appl Mater Interfaces. 2019 Jan 30;11(4):4211-4218. doi: 10.1021/acsami.8b14820. Epub 2018 Dec 18.
Four thermally cleavable polythiophene derivatives containing carbonate and solubilizing groups were synthesized for noncovalent modification of single-walled carbon nanotubes (SWCNTs). A well-dispersed polythiophene/SWCNTs composite was obtained by adsorption of the polymer at the SWCNT surface. The solution-processed composite film exhibited solid-state thermal cleavage of the insulating solubilizing group through decarboxylation, producing an insoluble composite film. The thermally cleavable composite film was evaluated for potential application as a thermoelectric (TE) material. The electrical conductivity (σ) of the thermally treated composite film was up to 250 times higher than that of the as-prepared composite film. The increased σ contributed to an increase in the power factor (PF). The ethanol-processed composite film could be applicable for green processing of a TE material using the less-toxic solvent. The substrate-free polythiophene/SWCNTs composite film prepared by simple solvent evaporation yielded a figure-of-merit of 3.1 × 10 with a PF of 28.8 μW m K at 25 °C. This solution-processed methodology is beneficial for the development of a flexible TE material.
四种含有碳酸酯和增溶基团的热裂解聚噻吩衍生物被合成用于非共价修饰单壁碳纳米管（SWCNTs）。通过聚合物在 SWCNT 表面的吸附，得到了分散良好的聚噻吩/SWCNT 复合材料。所得的溶液处理的复合膜通过脱羧反应实现了固态热裂解，从而得到不溶性的复合膜。该热裂解复合材料膜被评估为用作热电（TE）材料的潜在应用。热处理后的复合膜的电导率（σ）比未处理的复合膜高 250 倍。σ 的增加导致功率因子（PF）的增加。用毒性较小的溶剂进行乙醇处理的复合膜可用于 TE 材料的绿色处理。通过简单的溶剂蒸发制备的无基底聚噻吩/SWCNTs 复合膜在 25°C 时的品质因数为 3.1×10，功率因子为 28.8 μW m K。这种溶液处理方法有利于开发柔性 TE 材料。
