The Multilayer Support System

2 SUPPORTS FOR CERAMIC MEMBRANES 6.2.1 The Multilayer Support System [Pg.143]

A schematic drawing of a multilayer membrane support tube is shown in Fig. 6.2. The enlarged part reveals the layered structure of the material. The extruded support tube is layer 1. [Pg.143]

6 — PREPARATION OF ASYMMETRIC CERAMIC MEMBRANE SUPPORTS BY DIP-COATING [Pg.144]

Only a multilayer system can provide a substrate which is sufficiently smooth and flawless to serve as a support on which an almost defect-free microporous membrane can be made. In the following sections it will become [Pg.144]

Ultrafiltration (UF) and microfiltration (MF) membranes can be made on less sophisticated supports. The simplest MF tubular membrane consists of an extruded porous tube (layer 1) as a support coated on the inside or outside with a macroporous layer (layer 2) which serves as the functional filtration layer. The support system shown in Fig. 6.3 is in fact a sophisticated UF or Knudsen gas separation membrane. For less demanding applications a 2-layer support could also be used. [Pg.145]

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