Jakubka Florian, Schießl Stefan P, Martin Sebastian, Englert Jan M, Hauke Frank, Hirsch Andreas, Zaumseil Jana
Institute of Polymer Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany.
Institute of Advanced Materials and Processes (ZMP), Friedrich-Alexander-Universität Erlangen-Nürnberg, 90762 Fürth, Germany.
ACS Macro Lett. 2012 Jul 17;1(7):815-819. doi: 10.1021/mz300147g. Epub 2012 Jun 15.
The selective dispersion of single-walled carbon nanotube species (n,m) with conjugated polymers such as poly(9,9-dioctylfluorene) (PFO) and poly(9,9-dioctylfluorene--benzothiadiazole) (F8BT) in organic solvents depends not only on the type of solvent but also on the molecular weight of the polymer. We find an increasing amount of nanotubes and altered selectivities for dispersions with higher molecular weight polymers. Including the effects of different aromatic solvents, we propose that solution viscosity is one of the factors influencing the apparent selectivity by changing the reaggregation rate of the single-walled carbon nanotubes (SWNT). The type of solvent, polymer molecular weight, concentration, and viscosity should thus be taken into account when screening for new polymers for selective SWNT dispersion.
单壁碳纳米管种类（n,m）与共轭聚合物（如聚（9,9 - 二辛基芴）（PFO）和聚（9,9 - 二辛基芴 - 苯并噻二唑）（F8BT））在有机溶剂中的选择性分散不仅取决于溶剂类型，还取决于聚合物的分子量。我们发现，对于分子量较高的聚合物，纳米管的分散量增加且分散选择性发生改变。考虑到不同芳烃溶剂的影响，我们提出溶液粘度是通过改变单壁碳纳米管（SWNT）的再聚集速率来影响表观选择性的因素之一。因此，在筛选用于选择性SWNT分散的新型聚合物时，应考虑溶剂类型、聚合物分子量、浓度和粘度等因素。
