My name is Vince Kelly I hope to provide you with information about activated carbon fiber, a unique material, used in a wealth of applications, all over the world .
The production of activated carbon fiber
ACF use chiefly cellulose or acrylic precursors. Cellulose based precursor (for example from viscose rayon) tend to have a very low yield and not too good mechanical properties. Acrylic based ACF is increasing becoming a major product in all aspects of chemical filtration. The production of ACF involves
stabilizing the acrylic precursor in the same way as by structural carbon fibers, in air up to 300oC. The resulting oxidized fiber can be directly activated or more usually made into a fabric through conventional textile means (felting, spinning and weaving or knitting). The oxidized acrylic cloth is then activated, this involves heating the fabric to a temperature of up to 1300oC not in an inert atmosphere like in structural carbon fiber but in an oxidizing atmosphere such as CO2 or H2O (steam). The action of the oxidizing agent causes a tremendous attack on the surface of the fibers, this induces a huge surface area and a porous surface which the size and configuration of the pores influence greatly the power of the carbon atoms, on the surface to act as chemical „hooks" to attach to many chemical substances which may pass through the ACF filter.
The advantages of ACF
ACF is finding increasingly more application in everyday use. A unique property of an ACF fabric is the possibility to „reactivate" the fabric when it has become saturated, and to reuse it. Here is a little experiment I made in Scotland.
Or eMail me on: vince@carbon-fiber.com
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