A superhydrophobic PVDF-based membrane containing Metal-organic framework for efficient Oil-water separation

The discharge of oily wastewater has caused heavy burden to the environment, so it is necessary to solve this problem. Membrane separation, as a simple and efficient separation technology, has attracted widespread attentions in the field of oil-water separation. In this work, a superhydrophobic PVDF-based membrane containing MOFs with small size (ZJU-64-CH3-S) was prepared. ZJU-64-CH3-S with different amounts (200 mg, 400 mg and 600 mg) were added into PVDF to obtain ZJU-64-CH3-S/PVDF 3-S/PVDF membranes, which named as M1, M2 and M3. They displayed ideal hydrophobicity according to the large water contact angle (about 130 degrees). degrees ). And composite membranes showed good oil adsorption and excellent oil-water separation efficiency. In particularly, the oil flux of M2 reached to 333.33 L/(m(2)& sdot;h) and its oil-water separation efficiency was as high as 99 %. The composite membrane was expected to be used in the field of oil-water separation.