부산대학교 도서관

Background Perfluoropolymers as emerging polymers, have attracted widespread attention for effective treatment of waste oil and emulsion separation through combine with membrane separation technology.Methods Herein, the oleophilic stainless steel mesh-reinforced polyperfluorinated ethylene-propylene (SSM-FEP)composite membrane was prepared by one-step thermoplastic-sintering method, allowing for an exploration of the impact of FEP content and sintering temperature on pore structure.Significant findings By carefully adjusting the sintering temperature and FEP content, the SSM-FEP membrane features a uniform and concentrated pore size distribution. It achieves a rejection rate of over 99.6 % for silica oil suspensions and demonstrates excellent oleophilic and superhydrophobic properties with a rejection efficiency exceeding 98 % for kerosene emulsions. Additionally, the mechanical properties of the membrane showed a tensile strength higher than 160 MPa due to the stainless steel mesh reinforced structure. A favorable interface bonding between the separation layer and the supporting layer was achieved, ensuring sustained emulsion rejection even after undergoing ultrasonic oscillation. The separation mechanism can be elucidated through the designed experimentalmodel, and the membrane still maintains a high flux recovery rate for silicone oil suspension and emulsion after four cycles. Overall, the SSM-FEP composite membrane has great potential and promising prospects for the treatment of waste oil and oil-water emulsions separation.