Abstract
Organic–inorganic composite ultrafiltration membrane was prepared with Polyethersulphone and nano-xerogels. On the other hand, xerogels were also prepared by a simple method and were synthesized by a sol–gel process in which tetramethyl orthosilan and tetraethyl orthosilan were used as a precursor. Besides, high-energy planetary ball mill process was applied to make the nano-xerogels. Then, the final nano-xerogels were used to prepare ultrafiltration membrane. Modified membranes showed significant changes in physical and chemical properties. The presence of nano-xerogel in the membrane structure improved the hydrophilicity of the membrane. Pure water flux and the pore size of the membranes increased significantly. The result showed that BSA rejection of modified membranes is high. The membrane with 2 wt% of TEOS xerogel proved to have higher BSA rejection.
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