Patent ID: 11969697
Assignee: NANJING TECH UNIVERSITY
Field: Chemical engineering (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A method of using a phenyl-modified polydimethylsiloxane (PDMS) separation membrane in the separation of a solution comprising an organic compound being phenol, phenyl methanol, or phenyl ethanol,
wherein the phenyl-modified PDMS separation membrane comprises a substrate layer and a selective layer, wherein the phenyl-modified PDMS separation membrane is fabricated through the following steps:
step 1. subjecting a hydroxyl-terminated PDMS-based compound, a crosslinker, and a catalyst to a crosslinking reaction in an organic solvent to obtain a casting solution; and
step 2. coating the casting solution on a substrate, and conducting a thermal crosslinking reaction to obtain the phenyl-modified PDMS separation membrane;
wherein the hydroxyl-terminated PDMS-based compound has a structure represented by formula III:, the crosslinker is tetraethyl orthosilicate; a concentration of the hydroxyl-terminated PDMS-based compound in the organic solvent ranges from 5 wt % to 15 wt %;
the hydroxyl-terminated PDMS-based compound has a molecular weight Mw of 80,000;
the hydroxyl-terminated PDMS-based compound, the crosslinker, and the catalyst are in a mass ratio of 100:(5-15):(0.1-5); and
a material for the substrate layer is polytetrafluoroethylene with a pore size of 110 nm to 220 nm.