TY - JOUR

T1 - Oil–Water Separation on Hydrophobic and Superhydrophobic Membranes Made of Stainless Steel Meshes with Fluoropolymer Coatings

AU - Melnik, Alexandra

AU - Bogoslovtseva, Alena

AU - Petrova, Anna

AU - Safonov, Alexey

AU - Markides, Christos N.

N1 - This work was executed from the state contract with IT SB RAS, project number 121031800218–5. The deposition of unique fluoropolymer coatings for this work was funded by the Russian Science Foundation, project number 18-79-10119. The experimental equipment was provided by the Government of the Russian Federation, under Megagrant project number 075-15-2022-1043.

PY - 2023/4

Y1 - 2023/4

N2 - In this work, membranes were synthesized by depositing fluoropolymer coatings onto metal meshes using the hot wire chemical vapor deposition (HW CVD) method. By changing the deposition parameters, membranes with different wetting angles were obtained, with water contact angles for different membranes over a range from 130° ± 5° to 170° ± 2° and a constant oil contact angle of about 80° ± 2°. These membranes were used for the separation of an oil–water emulsion in a simple filtration test. The main parameters affecting the separation efficiency and the optimal separation mode were determined. The results reveal the effectiveness of the use of the membranes for the separation of emulsions of water and commercial crude oil, with separation efficiency values that can reach over 99%. The membranes are most efficient when separating emulsions with a water concentration of less than 5%. The pore size of the membrane significantly affects the rate and efficiency of separation. Pore sizes in the range from 40 to 200 µm are investigated. The smaller the pore size of the membranes, the higher the separation efficiency. The work is of great economic and practical importance for improving the efficiency of the membrane separation of oil–water emulsions. It lays the foundation for future research on the use of hydrophobic membranes for the separation of various emulsions of water and oil products (diesel fuel, gasoline, kerosene, etc.).

AB - In this work, membranes were synthesized by depositing fluoropolymer coatings onto metal meshes using the hot wire chemical vapor deposition (HW CVD) method. By changing the deposition parameters, membranes with different wetting angles were obtained, with water contact angles for different membranes over a range from 130° ± 5° to 170° ± 2° and a constant oil contact angle of about 80° ± 2°. These membranes were used for the separation of an oil–water emulsion in a simple filtration test. The main parameters affecting the separation efficiency and the optimal separation mode were determined. The results reveal the effectiveness of the use of the membranes for the separation of emulsions of water and commercial crude oil, with separation efficiency values that can reach over 99%. The membranes are most efficient when separating emulsions with a water concentration of less than 5%. The pore size of the membrane significantly affects the rate and efficiency of separation. Pore sizes in the range from 40 to 200 µm are investigated. The smaller the pore size of the membranes, the higher the separation efficiency. The work is of great economic and practical importance for improving the efficiency of the membrane separation of oil–water emulsions. It lays the foundation for future research on the use of hydrophobic membranes for the separation of various emulsions of water and oil products (diesel fuel, gasoline, kerosene, etc.).

KW - fluoropolymer

KW - hydrophobic

KW - oil–water separation

KW - stainless steel mesh

KW - superhydrophobic

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85152860257&origin=inward&txGid=ae7e967ebc2dbaab6869d0096b1c2aa6

UR - https://www.mendeley.com/catalogue/70ce13e5-a7a4-3a0d-bed3-0b049a3b0548/

U2 - 10.3390/w15071346

DO - 10.3390/w15071346

M3 - Article

VL - 15

JO - Water (Switzerland)

JF - Water (Switzerland)

SN - 2073-4441

IS - 7

M1 - 1346

ER -