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02월 19일 23시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능
제119회 대한화학회 학술발표회, 총회 및 기기전시회 안내
Microfluidics: Future Synthetic Tools
2017년 3월 16일 15시 34분 05초
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금 11시 : 00분
POSTECH 화학공학과, Korea
Microfluidic reactors manipulate fluids in the confined space on a scale of hundreds micrometres. Continuous-flow microreaction technology is attractive owing to inherent advantages such as efficient heat transfer and rapid mixing. It enables greater control of reaction conditions and safe operation in small volume usage, easy up-scaling, and the integrated operation. In here, various microreactors and their applications will be presented as new and future platforms for synthetic chemistry. These systems and techniques are used to carry out novel syntheses that are not or less feasible by conventional tools and process, which gets progressively incorporated into mainstream of chemistry.
The reactor requires resistant materials to temperatures, organic solvents, and needs efficient design for high mixing efficiency. Typically, polyimide (PI) film microreactor was fabricated by lamination of the patterned multiple numbers of films, up to 7 sheets, and a simple one-step multilayer bonding process. The multiplayered PI reactor provided 3D serpentine microchannel structure with chemically inert toward organolithium reagents and also robust to several hours of exposure to liquid N
and high pressures. This chip microreactor could deliver a reaction time in the submillisecond range for outpacing rapid intramolecular rearrangements, anionic Fries rearrangement. In addition, the synthesis of afesal with anthelmintic activity demonstrated its potential for practical synthesis and production.
•Continuous-flow and integrated process
Multiphase processes involving gas–liquid–solid offers clear advantages over conventional methods due to the increased surface-area-to-volume ratios, efficient mixing of reagents leads to improve reaction yields and/or selectivities. A serial process of chemical synthesis, its purification and utilization for a desired synthesis was conducted. In particular, microseparations via liquid-gas distillation in the binary phase of laminar flow to purify the generated reagents were demonstrated by fabricating the microreactor embedded with Si nanowired superamphiphobic structured channel.
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