Robust Organic/Inorganic Hybrid Porous Thin Films via Breath‐Figure Method and Gelation Process

A novel organic/inorganic hybrid honeycomb patterned porous thin film was prepared using the breath-figure method combined with a sol-gel process. An in situ formed gelable block copolymer, formed by mixing poly(styrene-alt-maleic anhydride)-block-polystyrene (P(St-a-MAn)-b-PS) and 3-aminopropyltrimethoxysilane (APS), was used as the structure directing agent. The porous film produced was dipped into an acid aqueous solution to induce a sol-gel process in the wall of film. As a result of gelation, the structure of this film transformed into a crosslinked silica oxide hybridized with PS, and this film resisted those organic solvents which were once good solvents for the copolymer precursor.

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