INFLUENCE OF ACTIVATION TIME ON THE PROPERTIES OF POLYACLYLONITRILE-BASED ACTIVATED CARBON HOLLOW-FIBER

Activated carbon hollow fiber (ACHF) was prepared from polyacrylonitri le (PAN) hollow fiber through carbonization in nitrogen and activation with carbon dioxide. The effect of the activation time on the pore si ze distribution and the surface structure of the resulted ACHF was inv estigated. The results show that increasing the activation time at 800 degrees C can increase the number of pores and reduce the crystal siz e, the tensile strength, the modulus, and the elongation. (C) 1995 Joh n Wiley & Sons, Inc.