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    Length-based liquid-liquid extraction of carbon nanotubes using a phase transfer catalyst
    1.
    发明授权
    Length-based liquid-liquid extraction of carbon nanotubes using a phase transfer catalyst 失效
    使用相转移催化剂的基于长度的液 - 液萃取碳纳米管

    公开(公告)号：US07578941B2

    公开(公告)日：2009-08-25

    申请号：US11289000

    申请日：2005-11-29

    申请人： Kirk J. Ziegler ,  Daniel J. Schmidt ,  Robert H. Hauge ,  Richard E. Smalley ,  Irene Morin Marek, legal representative

    发明人： Kirk J. Ziegler ,  Daniel J. Schmidt ,  Robert H. Hauge ,  Richard E. Smalley

    IPC分类号： B01D11/02

    CPC分类号： B82Y30/00 ,  B82Y10/00 ,  B82Y40/00 ,  C01B32/172 ,  C01B32/174 ,  C01B2202/02 ,  C01B2202/28 ,  Y10S977/75 ,  Y10S977/845 ,  Y10S977/847

    摘要： The present invention is generally directed to new liquid-liquid extraction methods for the length-based separation of carbon nanotubes (CNTs) and other 1-dimensional nanostructures. In some embodiments, such methods are directed to separating SWNTs on the basis of their length, wherein such methods comprise the steps of: (a) functionalizing SWNTs to form functionalized SWNTs with ionizable functional moieties; (b) dissolving said functionalized SWNTs in a polar solvent to form a polar phase; (c) dissolving a substoichiometric (relative to the amount of ionizable functional moieties present on the SWNTs) amount of a phase transfer agent in a non-polar solvent to form a non-polar phase; (d) combining the polar and non-polar phases to form a bi-phase mixture; (e) adding a cationic donor species to the bi-phase mixture; and (f) agitating the bi-phase mixture to effect the preferential transport of short SWNTs into the non-polar phase such that the non-polar phase is enriched in short SWNTs and the polar phase is enriched in longer SWNTs. In other embodiments, analogous methods are used for the length-based separation of any type of CNT, and more generally, for any type of 1-dimensional nanostructure.

    摘要翻译： 本发明一般涉及用于碳纳米管（CNT）和其它一维纳米结构的基于长度的分离的新的液 - 液萃取方法。 在一些实施方案中，这样的方法涉及基于其长度分离SWNT，其中此类方法包括以下步骤：（a）使SWNT官能化形成具有可离子化功能部分的官能化SWNT; （b）将所述官能化的单壁碳纳米管溶解在极性溶剂中以形成极性相; （c）在非极性溶剂中将相转移剂的亚化学计量（相对于存在于SWNT上的可离子化官能团的量）量溶解以形成非极性相; （d）组合极性和非极性相以形成双相混合物; （e）向双相混合物中加入阳离子供体物质; 和（f）搅拌双相混合物以实现短的单壁碳纳米管优先转运到非极性相中，使得非极性相富集在短的单壁碳纳米管中，极性相富集较长的单壁碳纳米管。 在其它实施方案中，类似的方法用于任何类型的CNT的长度分离，更通常地，对于任何类型的一维纳米结构。