Disclosed are polymeric blend membranes, and methods for their use, that include a blend of at least a first polymer and a second polymer, wherein the first and second polymers are each selected from a polymer of intrinsic microporosity (PIM), a polyetherimide (PEI) polymer, a polyimide (PI) polymer
Disclosed are polymeric blend membranes, and methods for their use, that include a blend of at least a first polymer and a second polymer, wherein the first and second polymers are each selected from a polymer of intrinsic microporosity (PIM), a polyetherimide (PEI) polymer, a polyimide (PI) polymer, or a polyetherimide-siloxane (PEI-Si) polymer, and wherein the polymeric membranes have been both ultraviolet (UV)-treated and thermally-treated.
대표청구항▼
1. A polymeric membrane comprising a blend of at least a first polymer and a second polymer, wherein the first polymer is a polymer of intrinsic microporosity (PIM) and the second polymer is a polyetherimide (PEI) polymer, or a polyetherimide-siloxane (PEI-Si) polymer, and wherein the polymeric memb
1. A polymeric membrane comprising a blend of at least a first polymer and a second polymer, wherein the first polymer is a polymer of intrinsic microporosity (PIM) and the second polymer is a polyetherimide (PEI) polymer, or a polyetherimide-siloxane (PEI-Si) polymer, and wherein the polymeric membrane has been ultraviolet (UV)-treated and thermally-treated, wherein the membrane is capable of separating a first gas from a second gas or is capable of separating a first gas from a mixture of gases, wherein the first gas is C2H4 and the second gas is C2H6, or wherein the first gas is C3H6 and the second gas is C3H8 or wherein the first gas is C2H4 and the mixture of gases includes C2H4 and C2H6, or wherein the first gas is C3H6 and the mixture of gases includes C3H6 and C3H8 and wherein the polymeric membrane has a selectivity that exceeds the Robeson's upper bound trade-off curve. 2. The polymeric membrane of claim 1, wherein the polymeric membrane has a selectivity of C2H4 to C2H6 or a selectivity of C3H6 to C3H8 that exceeds the Robeson's upper bound trade-off curve at a temperature of 25° C. and a feed pressure of 2 atm. 3. The polymeric membrane of claim 1, wherein the membrane comprises from 80 to 95% w/w of PIM-1 and from 5 to 20% w/w of the PEI polymer. 4. The polymeric membrane of claim 1, wherein the membrane is a flat sheet membrane, a spiral membrane, a tubular membrane, or a hollow fiber membrane. 5. The polymeric membrane of claim 1, wherein the membrane comprises from 5 to 95% by weight of the first polymer and from 95 to 5% by weight of the second polymer. 6. The polymeric membrane of claim 1, where the membrane further comprises a covalent organic framework (COF) additive, a carbon nanotube (CNT) additive, fumed silica (FS), titanium dioxide (TiO2) or graphene. 7. The polymeric membrane of claim 1, wherein the PIM polymer has repeating units of formula: 8. A method for separating at least one component from a mixture of components, the process comprising: contacting a mixture of components on a first side of the polymeric membrane of claim 1, such that at least a first component is retained on the first side in the form of a retentate and at least a second component is permeated through the membrane to a second side in the form of a permeate. 9. The method of claim 8, wherein the first component is a first gas and the second component is a second gas. 10. The method of claim 9, wherein the first gas is an olefin and the second gas is a paraffin. 11. A method of making the polymeric membranes of claim 1, the method comprising: (a) obtaining a mixture comprising at least a first polymer and a second polymer, wherein the first polymer is a polymer of intrinsic porosity (PIM) and the second polymer is a polyetherimide (PEI) polymer or a polyetherimide-siloxane (PEI-Si) polymer, and wherein the polymeric membrane has been ultraviolet (UV)-treated and thermally-treated, wherein the polymeric membrane has a selectivity that exceeds the Robeson's upper bound trade-off curve;(b) depositing the mixture onto a substrate and drying the mixture to form a membrane; and(c) subjecting the membrane to ultraviolet radiation and thermal treatment. 12. The method of claim 11, wherein the mixture is in liquid form and wherein the first polymer and the second polymer are solubilized within said mixture. 13. The method of claim 11, wherein the first and second polymers are homogenously blended in the membrane. 14. The method of claim 11, wherein drying comprises vacuum drying or heat drying or both. 15. The method of claim 11, wherein the membrane is UV-treated with UV radiation for 30 to 300 minutes, and wherein the membrane was thermally-treated at a temperature of to 100 to to 400° C. for 12 to 96 hours. 16. A gas separation device comprising the polymeric membrane of claim 1. 17. The gas separation device of claim 16, configured for using a flat sheet membrane, a spiral membrane, a tubular membrane, or a hollow fiber membrane. 18. The polymeric membrane of claim 1, wherein the second polymer is a PEI polymer. 19. The polymeric membrane of claim 1, wherein the second polymer is PEI-Si polymer.
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