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Study on Carbon Nano Fiber by Cotton Candy Method

Akihiro Tada, Ryo Takematsu, Supaphorn Thumsorn, Masayuki Okoshi, Hiroyuki Inoya, Hiroyuki Hamada and Yo


In this study we focused on Carbon Nano Fiber (CNF) in the carbon-based nano materials’s field. CNF is expected to various applications. However, CNF have a high cost of production. Therefore, we are trying to reduce a cost to make a preparation of the CNF precursor using Cotton Candy Method (CoCaM). The CoCaM is a novel method that can fabricate large amount of nano fiber. The feature of CoCaM is used to forming a fiber with only air injection. Therefore, it is possible to make a cost saving by CoCaM, because it does not need to heating and using the electric field. We studied producing PAN nano fibers by CoCaM and carbonizing conditions for nanofibers. We found the factor that PAN concentration, air pressure and feeding speed affected diameter of nano fiber. The average nano PAN fiber diameter changed from macro- to nano- meters under the CoCaM. After carbonization, we obverted that CNF were same shape of the PAN nano fiber. However, the diameter of CNF was decreased. The Raman spectrometry of nano carbon fiber by CoCaM showed high crystallinity. It was found that the ratio of the D and G band intensities (ID/IG) of carbon nano fiber is 0.58.

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