120th General Meeting of the KCS

Type Oral Presentation
Area Current Trends in Environmental and Energy Chemistry
Room No. Room 301
Time THU 10:40-:
Code ENVR.O-7
Subject Development of Dynamic Multi-functional Membrane by Thermo-reversible Assembly of Heavy-metal Responsive Materials
Authors Seung-Hwan Byun, Seung-Yeop Kwak*
Department of Materials Science and Engineering, Seoul National University, Korea
Abstract In this study, we synthesize the phthalocyanine derivatives and Hyperbranched Poly (amidoamine) (HPAMAM) with maleimide groups and prepared the furan modified PTFE membrane. The maleimide modified Pc and the maleimide modified HPAMAM are reacted to the furan modified PTFE membrane by Diels-Alder (DA) reaction, resulting in the HPAMAM/Pc-modified membrane capable of optically detecting and capturing the chromium ion. When the chromium containing aqueous solution is permeated to HPAMAM/Pc-modified membrane, the fluorescence emission peak at 400 nm and 600 nm attribute to the Pc moiety at the membrane surface is significantly decreased due to the electron-quenching, indicating complex formation between Pc at the membrane surface and chromium ion. Furthermore, heavy-metal adsorption performance and water permeability of the membrane was improved via hydrophilic property of HPAMAM layer. In addition, the HPAMAM and Pc moiety saturated by chromium could be removed from the membrane and the new unsaturated HPAMAM, Pc moiety is functionalized again at the membrane surface through peel-and-stick method based on the DA and retro DA (rDA) reaction. This shows the successful development of the regenerable membrane that can simultaneously detect and remove heavy metal ions during the membrane water purification.
E-mail juan31@snu.ac.kr