Properties and filtration performance of microporous metal membranes fabricated by rolling process

Abstract

We evaluated the filtration performance of microporous metal membranes fabricated by the rolling process. Metal wire meshes were rolled with thickness reduction ratios of 10, 20, and 30%. The pore size of the metal wire mesh membrane decreased with increasing rolling ratio, whereas the removal efficiency of the suspended solids and turbidity showed a very slight increase compared to that of an unrolled mesh membrane. The metal powder was dispersed on the surface of the rolled metal wire mesh membrane and bound with polyvinyl alcohol, then dried at 100 W C for 1 h, and finally sintered at 1,000 W C for 3 h. The mean pore size, suspended solids, and turbidity of the metal powder membrane at a rolling ratio of 30% were approximately 0.7 μm, 84% and 83%, respectively. Therefore, microporous metal membranes successfully fabricated by the rolling process were also sufficiently permeable filters.

Short Review on Porous Metal Membranes—Fabrication, Commercial Products, and Applications

“…Pall Corporation’s AccuSep™ sintered SS filters have a removal rating of 2–5 µm [ 31 ], and PMM ® metal membrane filters with 2 µm pores [ 32 ]. Most recently, a rolling-sintering process was also reported by Park and co-workers [ 77 ] to fabricate porous metal membranes with a pore size of ~4.5 µm.…”

Investigation of the Porosity Gradient in Thickness Direction Formed by Cold Rolling in Porous Aluminum

“…There are few works dealing with rolling of porous materials, and these usually focus on the modification of functional properties and not on the forming behavior per se (for example [24][25][26]). Thus, at this point it is necessary to consider studies on non-porous material.…”