| abstract |
The present invention relates to a method of forming a composite hollow fiber using a triple sheathing method, wherein the support layer is prepared by mixing polyvinylidene fluoride, poor solvent, and additives using a thermally induced phase separation (TIPS) And the coating layer was prepared by mixing polyvinylidene fluoride, a good solvent, a poor solvent, and an additive using a non-solvent induced phase separation (NIPS) The present invention relates to a method for producing an asymmetric hollow fiber membrane through a spinning process, a phase transfer process and a post-treatment process by simultaneously discharging a polymer solution and an asymmetric hollow fiber membrane which can be used for removing the virus produced by the process. |