Patent ID: 9636633
Date: 2017-05-02
CPC Classifications: B01D,B01J,Y02C

Claim:
1. A method for making a porous silicon oxide aerogel composite membrane, comprising: providing a porous aluminum oxide membrane having a plurality of macro pores with an average diameter larger than 50 nm wherein the porous aluminum oxide membrane has a first side and a second side; providing a silica sol prepared by a methyltrimethoxysiliane precursor; performing a gelation procedure, dipping at least one side of the porous aluminum oxide membrane, that is, the first side, the second side or the first and the second sides, into the silica sol to form a membrane coated with gel on its surface; performing an aging procedure, dipping the membrane coated with gel on its surface into ethanol for a predetermined period of aging time to form a composite membrane; performing a solvent exchange procedure, dipping the composite membrane after the aging procedure into n-hexane for a predetermined period of solvent exchange time; and performing a drying procedure, drying the composite membrane after the solvent exchange procedure so as to obtain the porous aluminum oxide membrane having porous silicon oxide aerogel as the porous silicon oxide aerogel composite membrane.