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정삼투압의 효과적인 유도용질로서의 이온성 액체에 대한 체계적인 연구
하나 게브리찌아버,정욱진,로렌스 림주코,김한승,아닐린 벤도이,그레이스 니솔라 한국막학회 2017 한국막학회 총회 및 학술발표회 Vol.2017 No.05
Ionic liquids (ILs) are potential drawing agents in forward osmosis (FO) due to their high ionicity, low vapor pressure and high solubility. A series of ILs were investigated as draw solutes for FO application and were compared with NaCl. Water (Jv )and reverse (Js) fluxes were evaluated using commercially available HTI-CTA membrane via FO and PRO modes. FO runs were conducted using 0.3M draw solution and DI water as feed. Results reveal that ILs like BMIM acetate, BMIM bromide and N4444 acetate were able to generate high Jv but with negligible Js. This demonstrates the potential of certain ILs as FO drawing agents. This research was supported by NRF through the Ministry of Science, ICT & Future Planning (No.2016R1A2B1009221) and through Basic Science Research Program of Ministry of Education(2009-0093816).
산화그래핀 슬폰산염 나노필터가 폴리비닐알콜 박막 복합형 정삼투막의 성능 및 물성에 미치는 영향
아닐린 벤도이,하나 게브리찌아버,박명준,김한승,정욱진,그레이스 니솔라 한국막학회 2018 한국막학회 총회 및 학술발표회 Vol.2018 No.05
Membrane fabrication is a critical area that hampers forward osmosis (FO) technology from industrialization. Herein, electrospun poly(vinyl alcohol) (PVA) nanofiber (NF) was used as a support layer for thin film composite (TFC) FO membrane. The PVA NF was incorporated with sulfonated graphene oxide (sGO). The oxygenous-rich sGO enhanced the hydrophilicity and mechanical strength of PVA NF as revealed by contact angle and tensile strength measurements, and pure water flux. On this support, the active polyamide layer was formed through interfacial polymerization. Meanwhile, FO performance of sGO/PVA TFC membrane is currently being evaluated. This work was supported by NRF of Korea funded by the Ministry of Science and ICT (2016R1A2B1009221 and 2017R1A2B2002109) and Ministry of Education (2009-0093816 and 22A20130012051 (BK21Plus)).
층별로 조립된 전하 모자이크 분리막 구성 요소로서의 PVA-PDADMAC 및 PVA-PSS 하전 막 제조의 최적화
아닐린 벤도이,그레이스 니솔라,하나 게브리찌아버,정욱진 한국막학회 2017 한국막학회 총회 및 학술발표회 Vol.2017 No.05
Piezodialysis involves the preferential permeation of ions over water molecules through charge mosaic membranes (CMM). This energy-efficient process incites interest as an alternative route to water desalination. But the development of effective CMMs remains a challenge due to their difficult fabrication. Herein, preparation of the positive and negative domains of a CMM were optimized. Negative poly(sodium styrene sulfonate) was blended in poly(vinyl alcohol) matrix, same as that of the positive poly(diallyldimethyl ammonium chloride). Results reveal that a balance between the two domains is critical for the CMM to achieve high salt enrichment and mechanical stability. This work was supported by NRF funded by the Korea government (MSIP) (No. 2017R1A2B2002109) and Basic Science Research Program of Ministry of Education (2009-0093816).
역 가황 폴리설파이드 기반 고분자 분리막을 이용한 수계내 수은의 선택적 분리
로렌스 림주코,그레이스 니솔라,하나 게브리찌아버,아닐린 벤도이,이성풍,정욱진 한국막학회 2017 한국막학회 총회 및 학술발표회 Vol.2017 No.05
Sulfur copolymer (poly(S-r-CEA)) was synthesized via facile inverse vulcanization of elemental sulfur with 2-carboxyethyl acrylate (CEA). Polysulfide (PS) oligomer was soluble to common solvents including DMF, producing homogenous dope solution with PAN as filler. PS-PAN was electrospun resulting to nanofiber membrane effective for Hg2+ sequestration with recorded maximum capacity of 612 mg g-1 based on Langmuir model isotherm. Kinetics, selectivity and reusability were also evaluated. This work presents new and cheap yet effective material for heavy metal sequestration from contaminated water. This work was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2015R1A2A1A15055407) and by the Ministry of Education (No. 2009-0093816).
역 가황반응과 전기방사를 통한 황 공중합체 나노섬유 멤브레인 제조 및 그를 이용한 폐수로부터의 중금속 제거
로렌스 림주코,그레이스 니솔라,하나 게브리찌아버,이성풍,정욱진 한국막학회 2016 한국막학회 총회 및 학술발표회 Vol.2016 No.05
Novel processable sulfur copolymer (poly(S-r-CEA)) was synthesized via facile inverse vulcanization of elemental sulfur with 2-carboxyethyl acrylate (CEA). This polysulfide was electrospun producing sulfur-rich nanofiber and tested for heavy metal sequestration. Adsorption experiments show very high and efficient Hg2+ adsorption. This work extends the novelty of inverse vulcanization chemistry by developing method for preparation of material based on inverse vulcanized polysulfide. Consequently, a new and cheap yet effective material was prepared for heavy metal sequestration from contaminated water. This work was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2015R1A2A1A15055407) and by the Ministry of Education (No. 2009-0093816).
리튬 회수용 크라운 에테르가 함침된 고분자 나노화이버 분리막 개발
로렌스 림주코,그레이스 니솔라,레이 토레호스,하나 게브리찌아버,이성풍,서정길,정욱진 한국막학회 2016 한국막학회 총회 및 학술발표회 Vol.2016 No.05
Synthesis of Li+-selective 14-crown ether (CE) having rigid and bulky subunits was reported. CE-poly(vinyl alcohol) (PVA) dope solutions were electrospun. CEs were immobilized on PVA matrix via acid-catalyzed acetalization using novel aerosol method. Structures of new compounds and their immobilization to PVA were confirmed and characterized. Adsorption experiments show superior lithium capacity and selectivity among previously reported solid-supported CEs. Dihydroxy-dibenzo-14-crown-4 ether-PVA nanofiber membrane showed superior performance. This work was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2015R1A2A1A15055407) and by the Ministry of Education (No. 2009-0093816).