Carbon or activated carbon nanofibers

Details Carbon or activated carbon nanofibers Carbon or activated carbon nanofibers

2007-11-20

2007-11-20

Menon, Krishnan S. (Department: 1723)

Liquid purification or separation

Filter

Material

C210S503000, C210S505000, C210S507000, C210S508000, C210S502100, C210S500290

Reexamination Certificate

active

10622882

ABSTRACT:
Carbon or activated carbon nanofibers are made from fibrillated nanofibers having a Canadian Standard Freeness of less than about 100, and/or a fiber diameter of less than or equal to about 400 nm. BET surface areas are greater than about 800 m2/g The fibrillated nanofibers can be made into a precursor paper and subjected to heat treatment to form carbon or activated carbon nanofiber sheets. A method of making is disclosed wherein carbonization occurs at a temperature of less than about 600° C. Activation occurs at temperatures greater than about 875° C. in less than or equal to about 30 minutes in an oxidizing atmosphere. Single step carbonization and activation in an oxidizing atmosphere is also disclosed. The carbon nanofibers or structures made therefrom are useful as filter media providing efficient adsorption and interception of microbiological contaminants due to the microporous carbon nanofiber structure.

REFERENCES:
patent: 4217386 (1980-08-01), Arons et al.
patent: 4929502 (1990-05-01), Giglia
patent: 5246794 (1993-09-01), Blomgren et al.
patent: 5424054 (1995-06-01), Bethune et al.
patent: 5681468 (1997-10-01), Sawan et al.
patent: 5762797 (1998-06-01), Patrick et al.
patent: 6183854 (2001-02-01), Stiller et al.
patent: 6194099 (2001-02-01), Gernov et al.
patent: 6321915 (2001-11-01), Wilson et al.
patent: 6346136 (2002-02-01), Chen et al.
patent: 6382526 (2002-05-01), Reneker et al.
patent: 6419839 (2002-07-01), Cox et al.

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