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    • 6. 发明授权
    • Polymerization initated at sidewalls of carbon nanotubes
    • 在碳纳米管的侧壁处开始聚合
    • US07879940B2
    • 2011-02-01
    • US10561253
    • 2004-06-21
    • James M. TourJared L. HudsonRamanan KrishnamoortiKoray YurekliCynthia A. Mitchell
    • James M. TourJared L. HudsonRamanan KrishnamoortiKoray YurekliCynthia A. Mitchell
    • B60C1/00C08F4/46
    • C08F4/484B82Y30/00B82Y40/00C01B32/174C01B2202/02C08F2/00C08F112/08C08F292/00C08K3/041C08K9/04C08L67/04
    • The present invention is directed to aryl halide (such as aryl bromide) functionalized carbon nanotubes that can be utilized in anionic polymerization processes to form polymer-carbon nanotube materials with improved dispersion ability in polymer matrices. In this process the aryl halide is reacted with an alkyllithium species or is reacted with a metal to replace the aryl-bromine bond with an aryl-lithium or aryl-metal bond, respectively. It has further been discovered that other functionalized carbon nanotubes, after deprotonation with a deprotonation agent, can similarly be utilized in anionic polymerization processes to form polymer-carbon nanotube materials. Additionally or alternatively, a ring opening polymerization process can be performed. The resultant materials can be used by themselves due to their enhanced strength and reinforcement ability when compared to their unbound polymer analogs. Additionally, these materials can also be blended with pre-formed polymers to establish compatibility and enhanced dispersion of nanotubes in otherwise hard to disperse matrices resulting in significantly improved material properties. The resultant polymer-carbon nanotube materials can also be used in drug delivery processes due to their improved dispersion ability and biodegradability, and can also be used for scaffolding to promote cellular growth of tissue.
    • 本发明涉及可用于阴离子聚合方法形成聚合物 - 碳纳米管材料的芳族卤化物(例如芳基溴)官能化碳纳米管,其具有改进的聚合物基质中的分散能力。 在该方法中,芳基卤化物与烷基锂物质反应,或与金属反应,分别用芳基 - 锂或芳基 - 金属键代替芳基 - 溴键。 还已经发现,其它官能化碳纳米管在去质子化脱质子化之后,可以类似地用于阴离子聚合方法中以形成聚合物 - 碳纳米管材料。 另外地或替代地,可以进行开环聚合过程。 所得材料由于与未结合的聚合物类似物相比具有增强的强度和增强能力,可以自己使用。 另外,这些材料也可以与预先形成的聚合物混合以建立纳米管在其它难分散的基质中的相容性和增强的分散,导致显着改善的材料性质。 所得到的聚合物 - 碳纳米管材料由于其改进的分散能力和生物降解性也可用于药物递送过程中,并且也可用于支架以促进组织的细胞生长。