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AssigneeGeneral Electric Company
InventorsDhaval Ajit BHANDARI, Patrick Joseph MCCLOSKEY, Paul Edward HOWSON, Kristi Jean NARANG, William KOROS
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The invention provides improved hollow fiber membranes having at least two layers, and methods for forming the same. The methods include co-extruding a first composition, a second composition, and a third composition to form a dual layer hollow fiber membrane. The first composition includes a glassy polymer; the second composition includes a polysiloxane; and the third composition includes a bore fluid. The dual layer hollow fiber membranes include a first layer and a second layer, the first layer being a porous layer which includes the glassy polymer of the first composition, and the second layer being a polysiloxane layer which includes the polysiloxane of the second composition.
A method of forming a hollow fiber membrane comprising two layers, said method comprising co-extruding a first composition, a second composition, and a third composition to form a dual layer hollow fiber membrane,
A hollow fiber membrane comprising a first layer and a second layer, the first layer being an inner porous layer comprising a glassy polymer, and the second layer being an outer polysiloxane layer, in direct contact with the inner layer, wherein the second layer has an average thickness of less than 1 μm.
Dependencies are inferred from the claim text.