| 초록 |
Polyacrylonitrile (PAN) is the most general precursor of carbon fibers. PAN-based fibers have excellent strength and modulus to replace metals using on aerospace and sports. Recently, Carbon nanotube (CNT) with high conductivity and good mechanical properties was introduced into PAN precursor. Oxidation and carbonization of PAN precursor are conducted to fabricate carbon fibers. In these processes, acidic- and aliphatic- components in CNT have good effect on manufacturing PAN-based carbon fibers because of reduction of oxidation temperature. In this work, we functionalized the surface of SWCNT or MWCNT with the poly(acrylic acid) (PAA) via radical polymerization of acrylic acid. PAA-grafted CNTs were homogeneously dispersed in PAN precursor solution. PAN-based carbon fibers containing different feed ratio of PAA-grafted CNTs were fabricated and characterized. |
