Mamedov Arif A, Kotov Nicholas A, Prato Maurizio, Guldi Dirk M, Wicksted James P, Hirsch Andreas
Chemistry Department, Oklahoma State University, Stillwater, Oklahoma 74078, USA.
Nat Mater. 2002 Nov;1(3):190-4. doi: 10.1038/nmat747.
The mechanical failure of hybrid materials made from polymers and single-wall carbon nanotubes (SWNT) is primarily attributed to poor matrix-SWNT connectivity and severe phase segregation. Both problems can be successfully mitigated when the SWNT composite is made following the protocol of layer-by-layer assembly. This deposition technique prevents phase segregation of the polymer/SWNT binary system, and after subsequent crosslinking, the nanometre-scale uniform composite with SWNT loading as high as 50 wt% can be obtained. The free-standing SWNT/polyelectrolyte membranes delaminated from the substrate were found to be exceptionally strong with a tensile strength approaching that of hard ceramics. Because of the lightweight nature of SWNT composites, the prepared free-standing membranes can serve as components for a variety of long-lifetime devices.
由聚合物和单壁碳纳米管（SWNT）制成的混合材料的机械故障主要归因于基体与SWNT之间的连接性差以及严重的相分离。当按照逐层组装方案制备SWNT复合材料时，这两个问题都可以得到成功缓解。这种沉积技术可防止聚合物/SWNT二元体系的相分离，并且在随后的交联之后，可以获得SWNT负载高达50 wt%的纳米级均匀复合材料。从基底上分层得到的独立式SWNT/聚电解质膜被发现具有异常高的强度，其拉伸强度接近硬陶瓷的拉伸强度。由于SWNT复合材料的轻质特性，所制备的独立式膜可作为各种长寿命器件的组件。
