HOLLOW FIBER NANO FILTRATION MEMBRANE AND MANUFACTURING METHOD THEREOF

摘要

The present invention relates to a hollow fiber nanofiltration membrane and a manufacturing method thereof. The manufacturing method of a hollow fiber type nano-membrane according to the present invention improves physical properties such as water permeability and divalent ion removal rate as a hydrophilic hollow support is bonded to a polyamide layer at an excellent bonding force by forming a hydrophilic hollow support having an asymmetric structure with sponge type pores at the inside of the hollow fiber and finger-shaped pores at the outside of the hollow fiber, making an aqueous amine solution react on the hollow fiber support modified to have hydrophilicity, and interfacial-polymerizing an organic solution containing acyl halide to form a polyamide layer; and has an excellent strength due to a composite membrane structure. Therefore, the hollow fiber nanofiltration membrane according to the present invention is expected to have an energy saving effect as the packing density and the membrane area are larger than the conventional spiral nanofiltration membrane module, which produces more flux in a low pressure. [Reference numerals] (AA) Example 1; (BB) Example 2; (CC) Comparative example 1