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Lower Critical Solution Temperature (LCST) Phase Separation of Glycol Ethers for Forward Osmotic Control

DC Field Value Language
dc.contributor.advisor이연-
dc.contributor.author다이치-
dc.date.accessioned2017-07-27T02:18:51Z-
dc.date.available2017-07-27T02:18:51Z-
dc.date.issued2014-02-
dc.identifier.other000000018030-
dc.identifier.urihttps://hdl.handle.net/10371/134899-
dc.description학위논문 (석사)-- 서울대학교 대학원 : 화학부(생화학전공), 2014. 2. 이연.-
dc.description.abstractLower critical solution temperature (LCST) phase transition of glycol ether (GE)/water mixtures induces abrupt change of osmotic pressure driven by mild temperature change. The temperature-controlled osmotic change was applied for the forward osmotic (FO) desalination. Among evaluated three GEs, di(ethylene glycol) n-hexyl ether (DEH) was selected as a potential FO draw solute. A DEH/water mixture with a high osmotic pressure could draw fresh water from a high-salt feed solution such as seawater through a semipermeable membrane at around 10 °C. The water-drawn DEH/water mixture was phase-separated into a water-rich phase and a DEH-rich phase at around 30 °C. The water-rich phase with a much reduced osmotic pressure released water into a low-salt solution, and the DEH-rich phase was recovered into the initial DEH/water mixture. The phase separation behaviour, the residual GEs concentration at the water-rich phase, the osmotic pressure of the DEH/water mixture, and the osmotic flux between DEH/water mixture and salt solutions were carefully analysed for FO desalination. The liquid-liquid phase separation of the GE/water mixture driven by the mild temperature change between 10 °C and 30 °C is very attractive for the development of an ideal draw solute for future practical FO desalination.-
dc.description.tableofcontentsAbstract

Introduction

Materials and Methods

Results and Discussion

Conclusions

References

Tables

Figures

Abstract in Korean
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dc.formatapplication/pdf-
dc.format.extent1544124 bytes-
dc.format.mediumapplication/pdf-
dc.language.isoen-
dc.publisher서울대학교 대학원-
dc.subjectthermo-sensitive materials-
dc.subjectlower critical solution temperature (LCST)-
dc.subjectglycol ether-
dc.subjectphase diagram-
dc.subjectdesalination-
dc.subject.ddc540-
dc.titleLower Critical Solution Temperature (LCST) Phase Separation of Glycol Ethers for Forward Osmotic Control-
dc.typeThesis-
dc.contributor.AlternativeAuthorDaichi Nakayama-
dc.description.degreeMaster-
dc.citation.pages33-
dc.contributor.affiliation자연과학대학 화학부-
dc.date.awarded2014-02-
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