東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Novel compatibilized immiscible poly...

Panapitiya, Nimanka Pathum.

FindBook

Google Book

Amazon

博客來

Novel compatibilized immiscible polymer blend based membranes for gas separations.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Novel compatibilized immiscible polymer blend based membranes for gas separations./
作者:	Panapitiya, Nimanka Pathum.
面頁冊數:	124 p.
附註:	Source: Dissertation Abstracts International, Volume: 75-11(E), Section: B.
Contained By:	Dissertation Abstracts International75-11B(E).
標題:	Molecular chemistry. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3629038
ISBN:	9781321056914

Novel compatibilized immiscible polymer blend based membranes for gas separations.
Panapitiya, Nimanka Pathum.

Novel compatibilized immiscible polymer blend based membranes for gas separations. - 124 p.

Source: Dissertation Abstracts International, Volume: 75-11(E), Section: B.

Thesis (Ph.D.)--The University of Texas at Dallas, 2014.

In this work, an alternative pathway to improve gas separation performance was investigated by developing a novel membrane microstructure comprising high performance, immiscible polymer blends compatibilized with metal organic frameworks (MOFs) and small molecules. In chapter one, a detailed introduction to the research background is provided explaining the need and the advantages of this novel approach. In chapter two, the use of zeolitic immidazolate framework-8 (ZIF-8) in controlling phase separation and driving membrane microstructure of a high performance, immiscible 6FDA-DAM:DABA (3:2): polybenzimidazole (PBI) blend is described. The membrane microstructure was examined using a battery of imaging techniques including scanning electron microscopy (SEM), transmission electron microscopy (TEM) and atomic force microscopy (AFM). With a small loading of ZIF-8 (5% (w/w)), the membrane morphology became stabilized as indicated by uniform and smaller domains of the dispersed phase. As the ZIF-8 loading was further increased, the dispersed domains became even smaller suggesting even better compatibility. These results were attributed to the interfacial localization of ZIF-8, that was driven by the lowering of the interfacial energy of the system as demonstrated by a theoretical calculation that depended on water contact angle measurements. In chapter three, the same approach was used but with a different high performance 6FDA-durene:PBI immiscible polymer blends along with colloidal ZIF-8. Improved gas separation performance surpassing the Robeson's upper bound for H2/CO2 separation was observed as the membrane morphology became stabilized due to the incorporation of colloidal ZIF-8. In chapter four, the use of the small molecule, 2-methylimidazole, to compatibilize 6FDA-DAM:DABA (3:2):PBI is demonstrated. This approach is further advantageous since these small molecules are thermally labile, less expensive, and can potentially form unique gas transport pathways within the membrane microstructure. To the best of our knowledge, this is the first report of the use of small molecules and MOFs to control the membrane microstructure and extensive phase separation of high performance immiscible polymer blends.

ISBN: 9781321056914Subjects--Topical Terms:

1071612
Molecular chemistry.

Novel compatibilized immiscible polymer blend based membranes for gas separations.
LDR:03296nmm a2200289 4500 001 2071353
005 20160708094645.5
008 170521s2014 ||||||||||||||||| ||eng d
020 $a 9781321056914
035 $a (MiAaPQ)AAI3629038
035 $a AAI3629038
040 $a MiAaPQ $c MiAaPQ
100 1 $a Panapitiya, Nimanka Pathum. $3 3186487
245 1 0 $a Novel compatibilized immiscible polymer blend based membranes for gas separations.
300 $a 124 p.
500 $a Source: Dissertation Abstracts International, Volume: 75-11(E), Section: B.
500 $a Adviser: John P. Ferraris.
502 $a Thesis (Ph.D.)--The University of Texas at Dallas, 2014.
520 $a In this work, an alternative pathway to improve gas separation performance was investigated by developing a novel membrane microstructure comprising high performance, immiscible polymer blends compatibilized with metal organic frameworks (MOFs) and small molecules. In chapter one, a detailed introduction to the research background is provided explaining the need and the advantages of this novel approach. In chapter two, the use of zeolitic immidazolate framework-8 (ZIF-8) in controlling phase separation and driving membrane microstructure of a high performance, immiscible 6FDA-DAM:DABA (3:2): polybenzimidazole (PBI) blend is described. The membrane microstructure was examined using a battery of imaging techniques including scanning electron microscopy (SEM), transmission electron microscopy (TEM) and atomic force microscopy (AFM). With a small loading of ZIF-8 (5% (w/w)), the membrane morphology became stabilized as indicated by uniform and smaller domains of the dispersed phase. As the ZIF-8 loading was further increased, the dispersed domains became even smaller suggesting even better compatibility. These results were attributed to the interfacial localization of ZIF-8, that was driven by the lowering of the interfacial energy of the system as demonstrated by a theoretical calculation that depended on water contact angle measurements. In chapter three, the same approach was used but with a different high performance 6FDA-durene:PBI immiscible polymer blends along with colloidal ZIF-8. Improved gas separation performance surpassing the Robeson's upper bound for H2/CO2 separation was observed as the membrane morphology became stabilized due to the incorporation of colloidal ZIF-8. In chapter four, the use of the small molecule, 2-methylimidazole, to compatibilize 6FDA-DAM:DABA (3:2):PBI is demonstrated. This approach is further advantageous since these small molecules are thermally labile, less expensive, and can potentially form unique gas transport pathways within the membrane microstructure. To the best of our knowledge, this is the first report of the use of small molecules and MOFs to control the membrane microstructure and extensive phase separation of high performance immiscible polymer blends.
520 $a This novel approach would benefit not only gas separations but also other membrane-based separations that use polymer blends to improve performances.
590 $a School code: 0382.
650 4 $a Molecular chemistry. $3 1071612
650 4 $a Plastics. $3 649803
690 $a 0431
690 $a 0795
710 2 $a The University of Texas at Dallas. $b Chemistry. $3 2096801
773 0 $t Dissertation Abstracts International $g 75-11B(E).
790 $a 0382
791 $a Ph.D.
792 $a 2014
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3629038