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    • 72. 发明公开
    • FINE CARBON FIBER AGGREGATE MASS FOR REDISPERSION AND PROCESS FOR PRODUCTION THEREOF
    • FEINCARBONFASERAGGREGATMASSE ZUR REDISPERGIERUNG UND HERSTELLUNGSVERFAHRENDAFÜR
    • EP2186931A1
    • 2010-05-19
    • EP08752298.3
    • 2008-05-01
    • National University Corporation Hokkaido University
    • FUGETSU, Bunshi
    • D01F9/127B01F17/00B01F17/14B01F17/16B01F17/18B01F17/22B01F17/52C01B31/02D06M10/00
    • D01F9/12B01F17/0007B82Y30/00B82Y40/00C01B32/16C01B32/174
    • The disclosed is a redispersible agglomerate of fine carbon fibers, which is obtained by adding the fine carbon fibers and a dispersing agent which shows solid state at least at ordinary temperature (20 ± 10 °C) into an aqueous dispersion medium, and then removing the dispersion medium from a dispersion system where the carbon fibers are isolated individually and dispersed in the dispersion medium; and in which the carbon fibers are got together and solidified in the agglomerate while each carbon fiber maintains its isolated dispersibility;
      wherein the carbon content is in the range of 0.01 - 99.5 % by weight, the dispersing agent content is in the range of 0.1-99.5 % by weight, and the moisture content is in the range of less than 10 % by weight, based on the total weight of the agglomerate; and
      wherein the dispersing agent is one member selected from the group consisting of (1) surfactants capable of forming spheroidal, cylindrical, or tabular micelles of 5-2000 nm in diameter in an aqueous solution; (2) water-soluble high polymers having a weight average molecular weight in the range of 10,000 - 50,000,000; and (3) a combination of cyclodextrin and fullerene.
      This redispersible agglomerate of fine carbon fibers has a good handling property and would form a dispersed state of individually isolated carbon fibers when it is added in any of various dispersion media.
    • 所公开的是通过将细碳纤维和至少在常温(20±10℃)下显示固态的分散剂添加到水分散介质中而获得的细碳纤维的可再分散聚集体,然后除去 分散体系分散介质,其中碳纤维被单独分离并分散在分散介质中; 并且其中碳纤维聚集在一起并固化在附聚物中,而每个碳纤维保持其分离的分散性; 其中碳含量在0.01〜99.5重量%的范围内,分散剂含量在0.1-99.5重量%的范围内,并且水分含量在小于10重量%的范围内,基于 附聚物的总重量; 并且其中所述分散剂是选自(1)在水溶液中直径为5-2000nm的球形,圆柱形或片状胶束的表面活性剂中的一种; (2)重均分子量在10,000〜50,000,000范围内的水溶性高分子; 和(3)环糊精和富勒烯的组合。 这种可再分散的细碳纤维聚集体具有良好的处理性能,并且当其加入到各种分散介质中时,将形成单独分离的碳纤维的分散状态。