Novel Flux Enhancing Agent for Improving Composite Polyamide Reverse Osmosis Membrane Performance

摘要

The present disclosure describes an additive that may be used in the manufacture of thin-film polyamide composite membranes. Thin-film polyamide composite membranes are used in filtration processes, such as reverse osmosis and nanofiltration. The additive may be an amino-siloxane compound. The amino-siloxane compound includes repeated groups of silicon bonded to oxygen with at least one amine functional group. Optionally, the amino-siloxane compound may also include a hydrophilic group. The additive reacts with an aqueous phase and an organic phase to form a thin polyamide film on a porous substrate.

主权项

1. A composite membrane for reverse osmosis or nanofiltration, the membrane comprising:
a porous substrate; a polymer layer on a surface of the porous substrate, wherein the polymer layer comprises a reaction product of an organic phase, an aqueous phase and an amino-siloxane compound, wherein the organic phase comprises polyacyl halides and the aqueous phase comprising amines.