Worsley Marcus A, Satcher Joe H, Baumann Theodore F
Chemistry, Materials, Earth and Life Sciences Directorate, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94551, USA.
Langmuir. 2008 Sep 2;24(17):9763-6. doi: 10.1021/la8011684. Epub 2008 Aug 9.
We report the synthesis and characterization for the first examples of monolithic low-density carbon aerogel (CA) nanocomposites containing double-walled carbon nanotubes. The CA nancomposites were prepared by the sol-gel polymerization of resorcinol and formaldehyde in an aqueous surfactant-stabilized suspension of double-walled carbon nanotubes (DWNTs). The composite hydrogels were then dried with supercritical CO 2 and subsequently carbonized under an inert atmosphere to yield monolithic CA structures containing uniform dispersions of DWNTs. The microstructures and electrical conductivities of these CA nanocomposites were evaluated for different DWNT loadings. These materials exhibited high BET surface areas (>500 m (2)/g) and enhanced electrical conductivities relative to pristine CAs. The details of these results are discussed in comparison with theory and literature.
我们报道了首例含有双壁碳纳米管的整体式低密度碳气凝胶（CA）纳米复合材料的合成与表征。通过在双壁碳纳米管（DWNTs）的水性表面活性剂稳定悬浮液中，使间苯二酚和甲醛进行溶胶 - 凝胶聚合反应来制备CA纳米复合材料。然后用超临界CO₂干燥复合水凝胶，并随后在惰性气氛下碳化，以得到含有均匀分散的DWNTs的整体式CA结构。针对不同的DWNT负载量，对这些CA纳米复合材料的微观结构和电导率进行了评估。相对于原始CA，这些材料表现出较高的BET表面积（>500 m²/g）和增强的电导率。将这些结果的细节与理论和文献进行了比较讨论。
