Coated asymmetric membrane system having oleophobic and hydrophilic properties
AssigneeGeneral Electric Company
InventorsVishal Bansal, Hieu Minh Duong
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Abstract
A porous membrane assembly includes, in an exemplary embodiment, a porous membrane substrate having hydrophobic properties. The membrane substrate includes a first side, an opposing second side and a plurality of pores extending therethrough. The membrane substrate also includes a discontinuous layer of an oleophobic coating applied to the first side so that the plurality of pores in the first side are substantially free of the oleophobic coating, and a continuous layer of an amine containing hydrophilic polymer coating applied to the second side of the membrane substrate.
Claims16
A porous membrane assembly comprising:
- a first porous membrane substrate having hydrophobic properties, said first membrane substrate comprising a first side, an opposing second side and a plurality of pores extending from said first side to said second side;
- a discontinuous layer of an oleophobic coating applied to said first side of said first membrane substrate so that said plurality of pores in said first side are substantially free of said oleophobic coating;
- a second porous membrane substrate having a first side, an opposing second side, and a plurality of pores extending therethrough, said second side of said first membrane substrate bonded to said first side of said second membrane substrate by a discontinuous layer of an adhesive;
- and
- a continuous layer of an amine containing hydrophilic polymer coating applied to said second side of said second membrane substrate.
A method of manufacturing a porous membrane assembly, said method comprising:
- providing a first porous membrane substrate having hydrophobic properties, the first membrane substrate comprising a first side, an opposing second side and a plurality of pores extending therethrough;
- forming a discontinuous layer of an oleophobic coating by applying the oleophobic coating to the first side of the first membrane substrate so that the plurality of pores in the first side are substantially free of the oleophobic coating;
- bonding a second porous membrane substrate having a first side, an opposing second side, and a plurality of pores extending therethrough, to the first membrane substrate, the second side of the first membrane substrate bonded to the first side of the second membrane substrate with a discontinuous layer of an adhesive;
- and
- forming a continuous layer of an amine containing hydrophilic polymer coating by applying the amine containing hydrophilic polymer coating to the second side of the second membrane substrate.
Dependencies are inferred from the claim text.