| 摘要 |
The present invention relates to a polyvinylidene fluoride (PVDF) asymmetric porous hollow fiber membrane, more particularly, to a polyvinylidene fluoride (PVDF) asymmetric porous hollow fiber membrane promoting convenience in the producing process by using water to extract a pore-forming agent without extra extraction process using chemicals such as alkali aqueous solution etc., reducing the unit cost of production, and having no influence on the structure of a separation membrane in a removal process of a porogen. In addition, the polyvinylidene fluoride (PVDF) asymmetric porous hollow fiber membrane with fine filter efficiency is excellent in mechanical intensity because the structure inside the hollow fiber membrane is spherical (spherulite like structure) and asymmetric dual structure of bicontinuous is increasingly expressed outwardly from inside, in a membrane cleaning process such as backwashing, significantly improves water permeability, and satisfies excellent elimination rate at the same time. |
