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首页> 外文期刊>Advanced Functional Materials >Individual Dissolution of Single-Walled Carbon Nanotubes by Using Polybenzimidazole, and Highly Effective Reinforcement of Their Composite Films
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Individual Dissolution of Single-Walled Carbon Nanotubes by Using Polybenzimidazole, and Highly Effective Reinforcement of Their Composite Films

机译：聚苯并咪唑对单壁碳纳米管的单独溶解及其复合膜的高效增强

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摘要

Polybenzimidazole (PBI) is shown to individually dissolve/disperse single-walled carbon nanotubes (SWNTs) in N,N-dimethyl-acetamide (DMAc), which is demonstrated by vis-near IR absorption and photoluminescence spectroscopy and atomic force microscopy observations. By casting these dispersions, SWNTs/PBI composite films were successfully fabricated on substrates without any sign of macroscopic aggregation. The thermal stability and mechanical properties of the composite films were investigated using thermogravimetric analysis (TGA) and tensile tests, respectively, and it was found that, first, the addition of SWNTs to PBI does not deteriorate the thermal stability of the matrix film, and second, the mechanical properties of the PBI film were reinforced by ca. 50% with only 0.06 wt % addition of the SWNTs to the film without reducing the thermal stability of the PBI. Raman spectroscopy of the composite films revealed the existence of an interaction between the PBI and the SWNTs. The individual dissolution of the SWNTs and efficient reinforcement of the PBI are due to the jt-tt interaction between the PBI and the sidewalls of the SWNTs.
机译：聚苯并咪唑（PBI）已显示可将单壁碳纳米管（SWNTs）单独溶解/分散在N，N-二甲基乙酰胺（DMAc）中，这通过近红外吸收和光致发光光谱以及原子力显微镜观察得到证明。通过浇铸这些分散体，SWNTs / PBI复合膜成功地在基材上制备，没有任何宏观聚集的迹象。分别使用热重分析（TGA）和拉伸试验研究了复合膜的热稳定性和机械性能，发现，首先，向PBI中添加SWNTs不会降低基体膜的热稳定性，并且第二，PBI膜的机械性能可通过约1来增强。将50％的SWNTs添加到薄膜中，而不会降低PBI的热稳定性，而仅添加0.06 wt％的SWNTs。复合膜的拉曼光谱表明，PBI和SWNT之间存在相互作用。 SWNT的单独溶解和PBI的有效增强归因于PBI和SWNT侧壁之间的jt-tt相互作用。

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