P-217 リグニン/ポリプロピレン混合多孔性炭素繊維の表面性状(ポスター発表)

抄録

Carbon fibers were prepared from the immiscible polymer blend of hardwood kraft lignin (HKL) and polypropylene (PP). Precursor blend fiber that had the unique core-shell morphology could be converted into porous carbon fibers by the two step thermal processing, thermostabilization (oxidation) and carbonization, without any additional activation process. Although, pores were developed during both thermal processes, the pore growth mechanisms were differed. During the thermostabilization process pores are created by the oxidative removal of the PP component from blend fibers. In contrast, pores were created by the gasification of the residual PP component from inside of thermostabilized blend fibers during carbonization. Internal surface area of HKL/PP blend carbon fibers varied depending on the blending composition in the precursor fibers. The largest pore creation could be found for the carbon fiber prepared from HKL/PP=62.5/37.5 blend fibers. These lignin based carbon fiber would be the good precursor of activated carbon fibers.