PREPARATION OF ULTRA-THIN CATION EXCHANGE COMPOSITE MEMBRANES BY A NOVEL PLASMA POLYMERIZATION TECHNIQUE

2007 
An after-glow capacitively coupled discharge technique has been used to fabricate ultra-thin proton exchange composite membranes in a plasma polymerization reactor, where styrene and acrylic acid are used as starting materials. By this technique, a good preservation of monomer structure can be achieved. The structure and composition of the plasma polymerized membranes were characterized by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FT-IR). The morphology information and thickness of the membranes were provided by Scanning electron micrographs (SEM). The synthesized membranes are dense with uniform structure and rich with carboxyl acid groups. This novel plasma polymerization technique is expected to be used for the preparation of alternative membranes to preserve their monomer structure to a maximum extent.
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