Cabezas Ana López, Liu Xianjie, Chen Qiang, Zhang Shi-Li, Zheng Li-Rong, Zhang Zhi-Bin
iPack VINN Excellence Center, School of Information and Communication Technology, Royal Institute of Technology (KTH), Stockholm SE-164 40, Sweden.
Department of Physics, Chemistry and Biology, Linköping University, Linköping SE-581 83, Sweden.
Materials (Basel). 2012 Feb 17;5(2):327-335. doi: 10.3390/ma5020327.
Significant influence on the thermal stability of polyaniline (PANI) in the presence of multi-walled carbon nanotubes (MWCNTs) is reported. By means of in-situ rapid mixing approach, water-dispersible nanofibrillar PANI and composites, consisting of MWCNTs uniformly coated with PANI in the state of emeraldine salt, with a well-defined core-shell heterogeneous structure, were prepared. The de-protonation process in PANI occurs at a lower temperature under the presence of MWCNTs on the polyaniline composite upon thermal treatment. However, it is found that the presence of MWCNTs significantly enhances the thermal stability of PANI's backbone upon exposure to laser irradiation, which can be ascribed to the core-shell heterogeneous structure of the composite of MWCNTs and PANI, and the high thermal conductivity of MWCNTs.
据报道，多壁碳纳米管（MWCNTs）的存在对聚苯胺（PANI）的热稳定性有显著影响。通过原位快速混合方法，制备了水分散性纳米纤维状聚苯胺及其复合材料，该复合材料由均匀包覆有处于翡翠盐状态的聚苯胺的多壁碳纳米管组成，具有明确的核壳异质结构。在热处理时，聚苯胺复合材料上多壁碳纳米管的存在使得聚苯胺中的去质子化过程在较低温度下发生。然而，发现多壁碳纳米管的存在显著提高了聚苯胺主链在激光照射下的热稳定性，这可归因于多壁碳纳米管与聚苯胺复合材料的核壳异质结构以及多壁碳纳米管的高导热性。
