Thin-Layer TiO₂ Membrane Fabrication by Condensed Layer Deposition

Area of Science:

• Materials Science and Engineering
• Chemical Engineering
• Nanotechnology

Background:

• Development of advanced membrane technologies is crucial for separation processes.
• Thin-film supported metal oxide membranes offer potential for enhanced stability and performance.
• Controlled nanocoating is key to tailoring membrane properties.

Purpose of the Study:

• To investigate a novel fabrication approach for thin-film supported metal oxide membranes.
• To explore the effect of TiO2/polyaniline nanocoatings on membrane properties.
• To evaluate the performance of coated membranes using polyethylene glycol (PEG).

Main Methods:

• Fabrication of membranes using condensed layer deposition of titanium dioxide (TiO2) on tubular microporous supports.
• Application of multiple consecutive layers of TiO2/polyaniline.
• Characterization using electron microscopy (SEM) and evaluation of membrane properties via permeability, rejection, and fouling analysis.

Main Results:

• SEM confirmed successful deposition of TiO2, creating a layer with partial coverage.
• Each coating layer gradually decreased membrane permeability and increased transmembrane pressure (TMP).
• Membrane rejection showed gradual improvement with increasing coating layers.

Conclusions:

• The developed TiO2/polyaniline nanocoating technique effectively modifies supported metal oxide membranes.
• The study demonstrates a tunable approach to control membrane permeability and rejection.
• This method shows promise for fabricating advanced membranes with tailored separation characteristics.