Centrifugal casting of ceramic membrane tubes and the coating with chitosan

摘要: Abstract In this paper, the centrifugal casting of ceramic membrane tubes is presented using different powder particle sizes and mixtures. The inner surface has a very regular pore structure also smooth. strength increases with increasing sintering temperature decreasing size up to stress values 1500 MPa. For strongest materials, pores porosities are in order 50 nm 30%, respectively. water permeability varies between 5 l/m 2 .h.bar. was coated highly porous chitosan biopolymer layer 30–50 μm thickness. prepared by phase-inversion method low high pH as solvent/non-solvent system. Silica, which dissolves at values, used porogen creates pores. This can adsorb heavy metals like copper. With system, Cu 2+ (50 ppm CuSO 4 ) be removed almost completely capacity 0.1 g /g chitosan.