Abstract:
본 발명은 계면활성제를 이용한 방사성이 향상된 탄소나노튜브 섬유의 제조방법 및 이에 의해 제조된 탄소나노튜브 섬유에 관한 것이다. 본 발명에 따른 탄소나노튜브 섬유의 제조방법은 탄소나노튜브 제조시에 계면활성제를 첨가하여, 계면활성제에 의해 촉매의 응집이 방해 및 지연됨으로써, 탄소나노튜브 섬유에 핵심적인 촉매의 크기가 줄어들고 분포가 균일하게 되어 탄소나노튜브 섬유의 강력과 전도도가 향상되고, 방사성도 증가하는 효과가 있다. 종래의 기술은 탄소나노튜브를 합성할 때 촉매가 되는 물질을 균일하게 뿌려주기 위하여 고압의 초임계 상태로 주입을 하여 탄소나노튜브 섬유를 제조해야 했으나, 본 발명에서는 분산제를 이용하므로 고압을 필요로 하는 초임계 상태에서의 주입이 필요 하지 않다.
Abstract:
The present invention provides a device for manufacturing nanofibers by using a centrifugal force, comprising: a polymer injection part for injecting polymers; a heating block for enveloping the surface of the polymer injection part and melting the polymers; a gas injection part installed at one side of the polymer injection part to inject gas; and a rotating disk installed on the lower end of the polymer injection part to manufacture nanofibers while rotating. Also, the present invention provides a method for manufacturing nanofibers by using a centrifugal force, comprising the steps of: melting the polymers by injecting the polymers into the polymer injection part and heating the polymers with the heating block (Step a); pushing the melted polymers radially to the surface of the rotating disk by injecting heated gas into the melted polymers (Step b); and discharging the nanofibers manufactured by using holes formed on a flat plate part of the rotating disk while the rotating disk rotates (Step c).
Abstract:
PURPOSE: A method for fabricating carbon nanotube fibers is provided to obtain the carbon nanotube fibers with high purity, tensile intensity, and electric conductivity. CONSTITUTION: A method for fabricating carbon nanotube fibers comprises: a step of preparing a solution for preparing carbon nanotube fibers, containing acetone, a catalyst, and an activator; a step of spraying the solution to the upper end of vertical electric furnace of 500-1500 Deg. C. in a size of microparticle; a step of passing the sprayed solution through the electric furnace to form carbon nanotube assembly; and a step of passing the carbon nanotube assembly through a shrinkage bath containing organic solvent.