| 摘要 |
The invention resides in a novel ignition resistant activated biregional fiber that is extremely flexible due to the presence of an inner core of a thermoplastic polymeric composition in the fiber that is surrounded by an outer sheath of activated carbon. The invention also discloses a process for the manufacture of flexible activated biregional fiber(s) by heating oxidation stabilized biregional fibers or carbonaceous biregional fibers in an activating atmosphere for a period of time and at a temperature sufficient to form an activated carbonaceous outer region in the fiber while the inner core of the fiber remain as a thermoplastic polymeric composition. The activated biregional fibers are particularly characterized by having a highly porous internal structure with an internal surface area of from about 50 m2/g to greater than 2000 m2/g depending on fiber diameter. Preferred end uses for the biregional activated carbon fiber(s) include, for example, air and water purification, solvent recovery, waste water treatment, the removal of noxious gases such as sulfur dioxide from stack gases, gas separation and storage, etc. |
