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Fundamental Water and Ion Transport through ZIF-8/Polymer Nanocomposite Membranes

Title
Fundamental Water and Ion Transport through ZIF-8/Polymer Nanocomposite Membranes
Other Titles
ZIF-8/고분자 나노복합막의 물과 이온의 전달현상
Author
Jee Yeon Oh
Alternative Author(s)
오지연
Advisor(s)
박호범
Issue Date
2019-02
Publisher
한양대학교
Degree
Master
Abstract
This dissertation describes fundamental water and ion transport properties of metal organic framework (MOF)/polymer nanocomposite membranes based on uncharged amorphous rubbery polymer, cross-linked poly(ethylene glycol) diacrylate (XLPEGDA). The flexible polymer chain was selected as a suitable polymeric matrix. Due to the ultrathin nature of polyamide layer within thin-film nanocomposite membranes, the experimental design capable of revealing the in-depth water/ion transport properties of MOF embedded nanocomposite membrane, is not straightforward. Among the MOFs, zeolitic imidazole framework-8 (ZIF-8) was chosen due to its appropriate pore size for separation of water and ions. The ZIF-8/XLPEGDA nanocomposite membranes were successfully prepared by varying the ZIF-8 content. No interfacial change between ZIF-8 and XLPEGDA was confirmed by density and crosslinking degree measurements. For water and ion transport properties, the water permeability was considerably increased, whereas NaCl permeability was nearly unchanged despite the increase in ZIF-8 loading, and water/NaCl permselectivity was consistently increased with the increase of ZIF-8 content. Based on the characterizations of water and salt permeability, the water/salt properties of ZIF-8 incorporated nanocomposite membranes differ from that of polymeric membrane. Overall, we revealed that the ZIF-8 enables the ions to transport inside the pore and provides the highly water permselective pathway in polymeric matrix. Furthermore, this approach of water and ion transport study would contribute to the practical guideline in fabricating optimal nanocomposite membranes.
URI
http://dcollection.hanyang.ac.kr/common/orgView/000000108052http://repository.hanyang.ac.kr/handle/20.500.11754/99426
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > ENERGY ENGINEERING(에너지공학과) > Theses (Master)
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