日　時： 2022年8月31日（水） 10:30～11:30
場　所： 広島大学工学部A4棟大学院生講義室 A4-112
交　通： 山陽本線西条駅下車、バス15 分、大学会館前下車
　　　　　山陽新幹線東広島駅下車、タクシー10分
　　　　　広島バスセンターから直行バス約1時間、大学会館前下車

講　演： Molecular separation by robust polycrystalline metal-organic framework membrane

講　師： Dr. YU XIN
公益財団法人地球環境産業技術研究機構（RITE） 無機膜研究センター　研究員

講演内容： Membrane process for organic solvent nanofiltration (OSN) is an urgent technology for products purification in chemical, biochemical, and pharmaceutical industries. Currently, the efficient separation of large molecules in the biochemical industry requires the membranes to be robust in organic solvents and have regular pore sizes. However, the stability and flexible requirements are not met by conventional polymer, ceramic, and zeolite membranes due to the issues of swelling, leaching, and small and irregular pores. Metal-organic frameworks (MOFs), consisting of metal ions coordinated to organic linkers, have great potential for separation because of their uniform and controllable pore sizes. However, the permeance of existing MOF membranes is still too low for industrial OSN applications. Herein, we report the fabrication of high-permeance iron(III)-based PCN-250 polycrystalline MOF membranes for organic solvent nanofiltration. A continuous and dense membrane with a small thickness of 3.7 μm was obtained under a synthesis time of 4 h. This membrane exhibits pure solvent permeance as high as 337.9 L m-2 h-1 bar-1 (LMH/bar) for methanol, and 17.2 LMH/bar for N-methyl-2-pyrrolidone (NMP) at room temperature. In addition, the PCN-250 membrane exhibits excellent molecular separation performance (methyl blue rejection of 93.7%) alongside high NMP permeance of 2.6 LMH/bar. Moreover, XRD and morphology studies, and continuous permeation test of membrane confirm that the PCN-250 membrane has good resistance toward water, acid, and organic solvents. This remarkable separation performance, combined with the outstanding solvent stability, make the PCN-250 membrane a promising candidate for organic solvent nanofiltration.

参加費： 無料