A Study on the Preparation and Characterization of Carbon Fiber Composite Filter

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J. Korean Ceram. Soc. > Volume 32(9); 1995 > Article

Journal of the Korean Ceramic Society 1995;32(9): 989.

탄소섬유 복합여과재의 제조 및 물성연구

이재춘, 신경숙, 이덕용, 김병균, 심선자, 임연수, 정윤중

명지대학교 무기재료공학과

A Study on the Preparation and Characterization of Carbon Fiber Composite Filter

ABSTRACT

Rigid porous carbon fiber composites with the uniform pore size distribution were prepared by vacuum forming from water slurries containing carbonized PAN fibers, a phenolic resin and ceramic binders. The composites were designed to use for highly efficient carbon fiber filters for particulate filtration and gas adsorption. As the as-received carbon fibers of 1mm in length were milled to an approximate average length of 300${mu}{textrm}{m}$, modulus of rupture (MOR) of the composite filter was increased from 1MPa to the value larger than 5 MPa. Modulus of rupture (MOR) for the composite filter fabricated using the milled carbon fiber was increased from 5 MPa to 10 MPa as the carbonization temperature of the PAN fiber was raised from 90$0^{circ}C$ to 140$0^{circ}C$. The air permeability and an average pore size of the composite filter were increased from 40 to 270cc/min.$textrm{cm}^2$ and from 35 to 80${mu}{textrm}{m}$, respectively, as the apparent porosity increased from 80 to 95%. It was shown that the MOR of the carbon fiber composite filter was dependent primarily on the average length of carbon fiber, carbonization temperature and the type of bonding materials.

Key words: Carbon fiber, Composite filter, Vacuum forming, Carbonization