Controlled Release and Delivery Lab, Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia.
ACS Appl Mater Interfaces. 2013 Aug 14;5(15):7478-84. doi: 10.1021/am401792c. Epub 2013 Jul 31.
Polyetherimide (PEI) nanocomposites comprising bucky gels of industrial-grade multiwalled carbon nanotubes (MWCNTs) and ionic liquid (IL, 1-butyl-3-methyl imidazolium hexafluorophosphate ([BMIM][PF6])) were prepared. The processing framework for this nanocomposite is simple, reproducible, and easily scalable. The strong interaction between IL and MWCNTs caused the latter to uniformly disperse in the PEI matrix while IL flowed into the gaps between the nanotubes' walls. The nanocomposite exhibited an enhanced conductivity of 2.01 × 10(4) Ω·cm volume resistivity at room temperature; the value decreased dramatically by 12 orders of magnitude, compared to pristine PEI. The IL free ions and MWCNTs networks provided excellent channels for electron transfer. PEI/bucky gels nanocomposites also showed improved thermal stability and high tensile strength. Other than having antiwear properties, this material can have numerous applications in the aerospace and electronics industries. Moreover, our work presents a "green" method toward modified nanocomposites industrial production as IL is environmentally safe and is easily recyclable.
制备了包含工业级多壁碳纳米管（MWCNTs）和离子液体（IL，1-丁基-3-甲基咪唑六氟磷酸盐([BMIM][PF6]））的巴基凝胶的聚醚酰亚胺（PEI）纳米复合材料。该纳米复合材料的加工框架简单、可重复且易于扩展。IL 与 MWCNTs 之间的强相互作用导致后者在 PEI 基质中均匀分散，同时 IL 流入纳米管壁之间的间隙中。该纳米复合材料在室温下表现出增强的导电性，体积电阻率为 2.01×10(4)Ω·cm；与原始 PEI 相比，其值急剧下降了 12 个数量级。无 IL 游离离子和 MWCNTs 网络为电子转移提供了极好的通道。PEI/巴基凝胶纳米复合材料还表现出改善的热稳定性和高拉伸强度。除了具有抗磨损性能外，这种材料还可以在航空航天和电子行业中有许多应用。此外，我们的工作提出了一种“绿色”方法来实现改性纳米复合材料的工业化生产，因为 IL 是环境安全且易于回收的。
