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US 12,128,363 B2Granted
Ultra-violet treatment of membranes and resulting membrane
AssigneeSolventum Intellectual Properties Company
InventorsLucas D. McIntosh, Aniruddha A. Upadhye, Joel A. Getschel
Life of this patent
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Abstract
A membrane having a first outer surface having a plurality of pores in a skin layer and the plurality of pores having a closed perimeter in the skin layer. The membrane having a second outer surface and a porous supporting layer connecting the first outer surface to the second outer surface. The first outer surface of the membrane is a melt-fused skin layer from exposure to ultra-violet light.
Claims18
A membrane comprising:
- a first outer surface having a plurality of pores in a skin layer;
- the plurality of pores having a closed perimeter in the skin layer;
- a second outer surface;
- a porous supporting layer connecting the first outer surface to the second outer surface;
- and
- wherein the first outer surface comprises a melt-fused skin layer from exposure to ultra-violet light;
- wherein the melt-fused skin layer has a depth and the depth extends for 500 nanometers or less;
- and
- wherein the membrane has a throughput capacity expressed as a mass of filtrate weighed after 10 minutes of filtration, and wherein the throughput capacity is between about 100 to 1000 grams.
6 more elements
A method of increasing the pore size in an outer surface of a membrane, the method comprising:
- providing a membrane having a first outer surface having a plurality of pores in a skin layer;
- the plurality of pores having a closed perimeter in the skin layer;
- and the membrane having a second outer surface and a porous supporting layer connecting the first outer surface to the second outer surface;
- and
- exposing the first outer surface to a pulsed ultra-violet flashlamp radiation, thereby generating a melt-fused skin layer, whereby the pores in the first surface are increased in size after exposure to the pulsed ultra-violet flashlamp radiation;
- wherein the membrane, after exposing the first outer surface to the pulsed ultra-violet flashlamp radiation, has a throughput capacity expressed as a mass of filtrate weighed after 10 minutes of filtration, and wherein the throughput capacity is between about 100 to 1000 grams.
3 more elements
Dependencies are inferred from the claim text.