摘要/Abstract

现有方法制备的单壁碳纳米管，混杂着半导体性和金属性两种碳管，需分离纯化后才能发挥这两种碳管各自的优异性能和广泛应用.在众多已开发的方法中，利用聚合物非共价相互作用实现半导体型和金属型碳管的选择性分离被认为是操作最简单、效率最高、无损碳管结构性能的方法.迄今为止，大量相关工作已被报道，开发了众多的聚合物体系，提出了各种分离纯化机理，但目前仍然没有统一的认识.综述了近年来有关单壁碳纳米管增溶和选择性分离的研究进展，分析了聚合物与单壁碳纳米管之间的相互作用，探讨了聚合物结构、分子量、侧链长度、聚合物与碳管比例、温度、溶剂等因素对碳管增溶与选择性分离的影响，比较了各种作用机理，并提出了自己的观点.
关键词: 单壁碳纳米管, 聚合物, 选择性分离, 非共价相互作用, 作用机理
Single-walled carbon nanotubes (SWNTs) prepared by present methods are a mixture of semiconducting and metallic ones, which need to be separated and purified to give them full play with their excellent properties and for their attractive applications. Among numerous developed methods, the selective separation of semiconducting and metallic SWNTs by polymer non-covalent interactions is considered to be the most simple, efficient and no-damage to carbon nanotube structure and properties method. So far, a lot of works have been reported, and many polymer systems have been developed. Meanwhile, various separation and purification mechanisms have been proposed, but there are still no unified and convincing understandings. In this review, the reported SWNT solubilization and selective separation works are summarized, the interactions between polymer and SWNTs are analyzed, and the effects of polymer structures, molecular weights, side chain lengths, polymer/SMNT ratio, temperature, and solvent are focally discussed. After comparing various separating mechanisms, our own understandings and views are put forward.
Key words: single-wall carbon nanotubes, polymer, selective separation, non-covalent interactions, mechanisms


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