활성화된 은 나노 입자를 Poly(amide-b-ether)와 Poly(vinyl pyrrolidone) 고분자 블랜드에 분산시킨 촉진 수송 분리막

Abstract

High gas permeable membrane has been required in order to deploy facilitated olefin transport membrane on a commercial scale. PEBAX 2533 was selected as a main matrix for PEBAX/PVP blend composite films due to the high gas permeable property of PEBAX 2533. Various ratios of PVP were added to synthesize and stabilize silver nanoparticles as a carrier. Silver nanoparticles were characterized with UV-Vis, TEM, and DLS. Synthesized silver nanoparticles were activated to the surface positive charge by an electron acceptor, TCNQ. And mixed-gas separation performances were measured with various PEBAX/PVP blend composite films. In Part 1, the conventional olefin/paraffin separation process in petrochemical industries was introduced, and the membrane process was discussed, which can be an alternative technology to the distillation process. However, membrane process also have a problem, that is the upper bound behavior. Therefore, facilitated transport membrane was adopted to achieve high mixed-gas separation performance over the upper bound. In Part 2, PEBAX 2533, which has high gas permeability, was selected as a main matrix for facilitated olefin transport. Previously, it was reported that silver nanoparticles were synthesized as a olefin carrier by PVP and activated to surface positive charge with TCNQ, resulting high separation performances. Based on this research, PEBAX 2533 and PVP were blended with various compositions. Surface morphologies of each composite film were measured with OM to confirm the film forming properties. Silver nanoparticles were synthesized in various PEBAX/PVP blend samples, and analyzed with UV-Vis, TEM, and DLS. Surfaces of silver nanoparticles were activated with TCNQ, and the propylene/propane mixed-gas separation performances were measured. Long-term stability was measured with PEBAX-50, which showed the best performance, and the separation performance was continued for 300 hours.