Fukushima Takanori, Kosaka Atsuko, Ishimura Yoji, Yamamoto Takashi, Takigawa Toshikazu, Ishii Noriyuki, Aida Takuzo
Aida Nanospace, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Corporation (JST), National Museum of Emerging Science and Innovation, 2-41 Aomi, Koto-ku, Tokyo 135-0064, Japan.
Science. 2003 Jun 27;300(5628):2072-4. doi: 10.1126/science.1082289.
When mixed with imidazolium ion-based room-temperature ionic liquid, pristine single-walled carbon nanotubes formed gels after being ground. The heavily entangled nanotube bundles were found to untangle within the gel to form much finer bundles. Phase transition and rheological properties suggest that the gels are formed by physical cross-linking of the nanotube bundles, mediated by local molecular ordering of the ionic liquids rather than by entanglement of the nanotubes. The gels were thermally stable and did not shrivel, even under reduced pressure resulting from the nonvolatility of the ionic liquids, but they would readily undergo a gel-to-solid transition on absorbent materials. The use of a polymerizable ionic liquid as the gelling medium allows for the fabrication of a highly electroconductive polymer/nanotube composite material, which showed a substantial enhancement in dynamic hardness.
当与基于咪唑鎓离子的室温离子液体混合时，原始单壁碳纳米管在研磨后形成凝胶。发现严重缠结的纳米管束在凝胶中解开，形成更细的束。相变和流变性质表明，凝胶是由纳米管束的物理交联形成的，由离子液体的局部分子有序介导，而不是由纳米管的缠结介导。这些凝胶具有热稳定性，即使在离子液体不挥发导致的减压下也不会收缩，但它们在吸收性材料上会很容易发生凝胶-固体转变。使用可聚合离子液体作为凝胶介质可以制造出高导电聚合物/纳米管复合材料，该复合材料的动态硬度有显著提高。
