Method of forming a cross-linked polymeric membrane
AssigneeSeppure Pte Ltd
InventorsMohammad Hossein Davood Abadi Farahani, Alfred Jun Jie Tay, Keng Siang Goh
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Abstract
There is provided a method of forming a cross-linked polymeric membrane, the method comprising: contacting a polymeric membrane with a cross-linking solution to form the cross-linked polymeric membrane, wherein the cross-linking solution comprises a cross-linker comprising at least one acyl halide functional group dissolved in a polar protic solvent. There is also provided a cross-linked polymeric membrane. In a preferred embodiment, hollow fiber polybenzimidazole (PBI) is crosslinked by trimesoyl chloride (TMC) or isophthaloyl chloride (IPC) in a solvent of ethanol or isopropyl alcohol (IPA).
Claims10
A method of forming a cross-linked polymeric membrane, wherein the polymeric membrane is formed from a polymer comprising at least one imidazole group, the method comprising contacting the polymeric membrane with a cross-linking solution to form the cross-linked polymeric membrane, wherein the cross-linking solution comprises a cross-linker comprising at least one acyl halide functional group dissolved in a polar protic solvent comprising at least one alcohol selected from:
- ethanol, isopropyl alcohol (IPA), and tert-butanol, wherein the cross-linked polymeric membrane has a polymer gel content of greater than or equal to 95% after polymer dissolution, and wherein the polymer gel content is calculated using the formula:
- %
-
- polymer
-
- gel
-
- content
- =
- final
-
- fibre
-
- weight
- initial
-
- fibre
-
- weight
- ×
- 100
-
- %
- .
Dependencies are inferred from the claim text.