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Fluorinated Polymers for Gas Separation Membrane Application.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Fluorinated Polymers for Gas Separation Membrane Application./
作者:	Yavari, Milad.
面頁冊數:	1 online resource (155 pages)
附註:	Source: Dissertation Abstracts International, Volume: 79-08(E), Section: B.
Contained By:	Dissertation Abstracts International79-08B(E).
標題:	Chemical engineering. -
電子資源:	click for full text (PQDT)
ISBN:	9780355680027

Fluorinated Polymers for Gas Separation Membrane Application.
Yavari, Milad.

Fluorinated Polymers for Gas Separation Membrane Application. - 1 online resource (155 pages)

Source: Dissertation Abstracts International, Volume: 79-08(E), Section: B.

Thesis (Ph.D.)--State University of New York at Buffalo, 2018.

Includes bibliographical references

Membrane is an interesting technology for gas separation application due to the facility and cost-effective process. Industrial membranes are usually thin film composites to reduce the cost of membrane preparation, which a selective layer with &sim;100 nm thickness provides the gas permeability and selectivity. Membrane materials should exhibit stability, high and durable gas separation performance during the lifetime of the membrane. Herein we study fluorinated polymers as a promising material, which fulfills the criteria for membrane applications.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9780355680027Subjects--Topical Terms:

555952
Chemical engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Fluorinated Polymers for Gas Separation Membrane Application.
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245 1 0 $a Fluorinated Polymers for Gas Separation Membrane Application.
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500 $a Source: Dissertation Abstracts International, Volume: 79-08(E), Section: B.
500 $a Adviser: Haiqing Lin.
502 $a Thesis (Ph.D.)--State University of New York at Buffalo, 2018.
504 $a Includes bibliographical references
520 $a Membrane is an interesting technology for gas separation application due to the facility and cost-effective process. Industrial membranes are usually thin film composites to reduce the cost of membrane preparation, which a selective layer with &sim;100 nm thickness provides the gas permeability and selectivity. Membrane materials should exhibit stability, high and durable gas separation performance during the lifetime of the membrane. Herein we study fluorinated polymers as a promising material, which fulfills the criteria for membrane applications.
520 $a The first chapter is a terminology of gas transport in polymer films and an introduction to permeability/selectivity tradeoff and physical aging as the most important challenges in polymeric membrane gas separation. The second chapter investigates the effect of physical aging on the gas permeance and selectivity of TFC membranes of perfluoropolymers. The thickness of TFC membranes has a significant effect on the gas permeance stability during the time, which gas permeance decreases faster by decreasing the film thickness. Interestingly, the gas permeance of the perfluoropolymer membranes is much more stable than that in hydrocarbon polymer films with similar thickness. In chapter 3 the effect of physical aging on Tg of the TFC membranes was studied. Tg of the membranes was determined in situ by a new method, Nano-Thermal Analysis (Nano-TA). Physical aging increases the Tg of the TFC membranes during the time. The Tg increasing and decreasing of the gas permeance in the TFC membranes were explained by using a free volume model.
520 $a In the 4th chapter in a fundamental study, we investigated the effect of fluorine and chlorine substituents on gas separation performance of PCTFE. PCTFE with a simple structure shows superior He/gas separation performance. Using organic liquids as the markers, we showed fluorine substituents increase He/gas solubility selectivity while the behavior cannot be observed for chlorinated and hydrocarbon organics materials. In addition, the comparison between analogue polyethylenes shows chlorine substituent increases Tg and size-sieving ability of PCTFE.
520 $a The last chapter we study gas separation properties of poly(PFMD) and poly(PFMMD) as a new generation of perfluoropolymers for membrane application. The polymers show interesting He/gas, H2/gas, and CO 2/gas separation performance. The comparison between separation of the perfluoropolymers and Teflon AFRTM, Hyflon ADRTM s and CytopRTM which are commercial perfluoropolymers, shows the new perfluoropolymers have superior gas separation performance. For example, while H2 permeability of poly(PFMD) and Cytop RTM are comparable but the H2/CH4 selectivities are 383 and 30, respectively. The new perfluoropolymers show higher size-sieving ability than commercial perfluoropolymers.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Chemical engineering. $3 555952
650 4 $a Materials science. $3 557839
650 4 $a Engineering. $3 561152
655 7 $a Electronic books. $2 local $3 554714
690 $a 0542
690 $a 0794
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710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a State University of New York at Buffalo. $b Chemical and Biological Engineering. $3 1182299
773 0 $t Dissertation Abstracts International $g 79-08B(E).
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10744814 $z click for full text (PQDT)