Chemically modified ceramic membranes

✍ Scribed by J Caro; M Noack; P Kölsch

• Book ID: 104431484
• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 754 KB
• Volume: 22
• Category: Article
• ISSN: 1387-1811
• DOI: 10.1016/s1387-1811(98)00107-3

✦ Synopsis

Commercial ultrafiltration ceramic filters have been modified by chemical treatment. The c-Al 2 O 3 top layer of the asymmetric ceramic filter was modified (1) by in situ hydrolysis of tetraethylorthosilicate, giving a hydrophilic nanoporous SiO x top layer rich in Si-OH, (2) by silylation of the c-Al 2 O 3 layer, providing an organophilic functionalization, and (3) by reaction of the c-Al 2

O 3 layer with alkyl/aryl phosphonic acids, resulting in an organophobic behaviour. By these chemical treatments both a pore narrowing and a hydrophilic/hydrophobic functionalization can be achieved. Permeation results of single gases and pervaporation data of liquid mixtures on the novel membranes are presented.