Porous ceramics for affinity chromatography applications

摘要

Porous ceramics for use as biological support maertials have been made by casting a melt in the Na_2O-CaO-P_2O_5-TiO_2-SiO_2 system followed by leaching in HCl. The melt crystallised upon cooling forming a three phase material comprised of a sodium-calcium-phosphate phase, titania (rutile) and amorphous silica. Acid leaching removed the sodium-calcium-phosphate phase leaving a continuous porous network of titania and silica. Average pore diameters are of the order of 2-3 mum with a corresponding surface area of 90 m~2/g.