| 摘要 |
The present invention relates to a polyvinyldenfluoride (PVDF) asymmetric porous fiber membrane, and more particularly, to a manufacturing method of forming a spherulite-like structure in which the spherulite-like structure having a gradually increasing diameter is not peeled and the pore size of a coating layer is not varied after cleaning since there is no need to separately form a coating layer. Due to the forming of the spherulite-like structure, the present invention may provide a PVDF asymmetric porous fiber membrane in which, since the mechanical strength thereof is excellent compared to a PVDF porous fiber membrane manufactured with conventional technology, the PVDF asymmetric porous fiber membrane may be effectively used in a membrane cleaning technique such as a backwash and have excellent filtration efficiency that remarkably enhances water flux and concurrently satisfies an excellent rejection rate. |
