▎ 摘　　要

NOVELTY - Water purifying filter manufacturing involves preparing porous reduced graphene oxide film by applying a solution containing graphene oxide to substrate under heat-treating, and then preparing a mixed solution for preparing a polyvinylidene fluoride composite film comprising carbon nanotubes and polyvinylidene fluoride. The prepared polyvinylidene fluoride composite film is applied on the porous reduced graphene oxide film. USE - Method for manufacturing water purifying filter used in direct water connection type water purification device (claimed). ADVANTAGE - The method manufactures the water purifying filter in a simple, cost-effective and eco-friendly manner with high filtration efficiency and water permeability at the same time by using a simple process and equipment. The manufactured water purifying filter easily removes chlorine and harmful substances including chloroform, heavy metals including arsenic, and viruses, and has excellent chromaticity and turbidity removal rate, increases efficiency of use of domestic water, has excellent antibacterial effect removing, high permeation rate without damaging filter due to excellent mechanical strength and durability, minimizes filtration step and filter installation space, and improves convenience, and can be used by connecting to a water pipe line in which water for daily use is supplied in a direct water connection structure. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic scanning electron microscope cross-sectional photograph of the manufactured water filter.