Patent ID: 9409357
Filing Date: 2016-08-09
CPC Classification: B29D,G01N

Claim Text:
1. A method for forming a series of pH-specific membranes in a microchannel, the method comprising: introducing a first aqueous acrylamide monomer solution into the microchannel having a first pH; polymerizing the first aqueous acrylamide monomer solution at a first location in the microchannel to generate a first membrane having the first pH; removing a non-polymerized portion of the first aqueous acrylamide monomer solution from the microchannel; introducing a second aqueous acrylamide monomer solution into the microchannel having a second pH; polymerizing the second aqueous acrylamide monomer solution at a second location in the microchannel to generate a second membrane having the second pH; removing a non-polymerized portion of the second aqueous acrylamide monomer solution from the microchannel; and filling the microchannel with a third aqueous acrylamide monomer solution having a third pH, wherein the third aqueous acrylamide monomer solution is located in the microchannel between the first membrane and the second membrane, and the first pH, the second pH, and the third pH are different.