Gas separation membranes prepared with copolymers of perfluoro(2-methylene-4,5-dimethyl-1,3-dioxlane) and chlorotrifluoroethylene

Minfeng Fang, Yoshiyuki Okamoto, Yasuhiro Koike, Zhenjie He, Timothy C. Merkel

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Several families of hydrocarbon polymers (polysulfones, polycarbonates, cellulose acetates, polyamides, and polyimides) have been established as common industrial gas separation membranes over the past three decades. Fluoropolymer membranes have found commercial use because of their unique gas separation properties in addition to their extraordinary chemical resistance and thermo-oxidative stability. To date, studies of gas transport in fluoropolymers have been limited largely to variants of the commercially available perfluoropolymers: Teflon® AF, Cytop™, and Hyflon® AD. Here, we describe gas transport in composite membranes fabricated from copolymers of perfluoro(2-methylene-4,5-dimethyl-1,3-dioxolane) (PFMDD) and chlorotrifluoroethlyene (CTFE). This poly(PFMDD-co-CTFE)-based membranes have far superior gas separation performance compared to the commercial perfluoropolymers for a number of gas pairs, including H2/CH4, He/CH4, and CO2/CH4. The gas separation performance of the membranes depends strongly on the copolymer composition. Increasing the amount of CTFE up to 30 mol% in the copolymer increases the membrane selectivity and reduces permeance. The membranes based on 70 mol% PFMDD-30 mol% CTFE poly(PFMDD-co-CTFE) show H2/CH4 and He/CH4 selectivities of 210 and 480, respectively, values that far exceed those possible with the known commercial perfluoropolymers.

Original languageEnglish
Pages (from-to)18-22
Number of pages5
JournalJournal of Fluorine Chemistry
Volume188
DOIs
Publication statusPublished - 2016 Aug 1

Fingerprint

methylene
copolymers
Copolymers
Gases
membrane
membranes
Membranes
gases
gas
fluoropolymers
gas transport
Fluorine containing polymers
polycarbonate
selectivity
Chemical resistance
Composite membranes
Nylons
teflon (trademark)
Polytetrafluoroethylene
polycarbonates

Keywords

  • Chlorotrifluoroethylene
  • Gas separation membrane
  • Perfluoro dioxolane
  • Perfluoropolymer
  • Poly(PFMDD-co-CTFE)

ASJC Scopus subject areas

  • Biochemistry
  • Environmental Chemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

Cite this

Gas separation membranes prepared with copolymers of perfluoro(2-methylene-4,5-dimethyl-1,3-dioxlane) and chlorotrifluoroethylene. / Fang, Minfeng; Okamoto, Yoshiyuki; Koike, Yasuhiro; He, Zhenjie; Merkel, Timothy C.

In: Journal of Fluorine Chemistry, Vol. 188, 01.08.2016, p. 18-22.

Research output: Contribution to journalArticle

@article{4cb1875cb0a84780a496ccefaea48903,
title = "Gas separation membranes prepared with copolymers of perfluoro(2-methylene-4,5-dimethyl-1,3-dioxlane) and chlorotrifluoroethylene",
abstract = "Several families of hydrocarbon polymers (polysulfones, polycarbonates, cellulose acetates, polyamides, and polyimides) have been established as common industrial gas separation membranes over the past three decades. Fluoropolymer membranes have found commercial use because of their unique gas separation properties in addition to their extraordinary chemical resistance and thermo-oxidative stability. To date, studies of gas transport in fluoropolymers have been limited largely to variants of the commercially available perfluoropolymers: Teflon{\circledR} AF, Cytop™, and Hyflon{\circledR} AD. Here, we describe gas transport in composite membranes fabricated from copolymers of perfluoro(2-methylene-4,5-dimethyl-1,3-dioxolane) (PFMDD) and chlorotrifluoroethlyene (CTFE). This poly(PFMDD-co-CTFE)-based membranes have far superior gas separation performance compared to the commercial perfluoropolymers for a number of gas pairs, including H2/CH4, He/CH4, and CO2/CH4. The gas separation performance of the membranes depends strongly on the copolymer composition. Increasing the amount of CTFE up to 30 mol{\%} in the copolymer increases the membrane selectivity and reduces permeance. The membranes based on 70 mol{\%} PFMDD-30 mol{\%} CTFE poly(PFMDD-co-CTFE) show H2/CH4 and He/CH4 selectivities of 210 and 480, respectively, values that far exceed those possible with the known commercial perfluoropolymers.",
keywords = "Chlorotrifluoroethylene, Gas separation membrane, Perfluoro dioxolane, Perfluoropolymer, Poly(PFMDD-co-CTFE)",
author = "Minfeng Fang and Yoshiyuki Okamoto and Yasuhiro Koike and Zhenjie He and Merkel, {Timothy C.}",
year = "2016",
month = "8",
day = "1",
doi = "10.1016/j.jfluchem.2016.05.013",
language = "English",
volume = "188",
pages = "18--22",
journal = "Journal of Fluorine Chemistry",
issn = "0022-1139",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Gas separation membranes prepared with copolymers of perfluoro(2-methylene-4,5-dimethyl-1,3-dioxlane) and chlorotrifluoroethylene

AU - Fang, Minfeng

AU - Okamoto, Yoshiyuki

AU - Koike, Yasuhiro

AU - He, Zhenjie

AU - Merkel, Timothy C.

PY - 2016/8/1

Y1 - 2016/8/1

N2 - Several families of hydrocarbon polymers (polysulfones, polycarbonates, cellulose acetates, polyamides, and polyimides) have been established as common industrial gas separation membranes over the past three decades. Fluoropolymer membranes have found commercial use because of their unique gas separation properties in addition to their extraordinary chemical resistance and thermo-oxidative stability. To date, studies of gas transport in fluoropolymers have been limited largely to variants of the commercially available perfluoropolymers: Teflon® AF, Cytop™, and Hyflon® AD. Here, we describe gas transport in composite membranes fabricated from copolymers of perfluoro(2-methylene-4,5-dimethyl-1,3-dioxolane) (PFMDD) and chlorotrifluoroethlyene (CTFE). This poly(PFMDD-co-CTFE)-based membranes have far superior gas separation performance compared to the commercial perfluoropolymers for a number of gas pairs, including H2/CH4, He/CH4, and CO2/CH4. The gas separation performance of the membranes depends strongly on the copolymer composition. Increasing the amount of CTFE up to 30 mol% in the copolymer increases the membrane selectivity and reduces permeance. The membranes based on 70 mol% PFMDD-30 mol% CTFE poly(PFMDD-co-CTFE) show H2/CH4 and He/CH4 selectivities of 210 and 480, respectively, values that far exceed those possible with the known commercial perfluoropolymers.

AB - Several families of hydrocarbon polymers (polysulfones, polycarbonates, cellulose acetates, polyamides, and polyimides) have been established as common industrial gas separation membranes over the past three decades. Fluoropolymer membranes have found commercial use because of their unique gas separation properties in addition to their extraordinary chemical resistance and thermo-oxidative stability. To date, studies of gas transport in fluoropolymers have been limited largely to variants of the commercially available perfluoropolymers: Teflon® AF, Cytop™, and Hyflon® AD. Here, we describe gas transport in composite membranes fabricated from copolymers of perfluoro(2-methylene-4,5-dimethyl-1,3-dioxolane) (PFMDD) and chlorotrifluoroethlyene (CTFE). This poly(PFMDD-co-CTFE)-based membranes have far superior gas separation performance compared to the commercial perfluoropolymers for a number of gas pairs, including H2/CH4, He/CH4, and CO2/CH4. The gas separation performance of the membranes depends strongly on the copolymer composition. Increasing the amount of CTFE up to 30 mol% in the copolymer increases the membrane selectivity and reduces permeance. The membranes based on 70 mol% PFMDD-30 mol% CTFE poly(PFMDD-co-CTFE) show H2/CH4 and He/CH4 selectivities of 210 and 480, respectively, values that far exceed those possible with the known commercial perfluoropolymers.

KW - Chlorotrifluoroethylene

KW - Gas separation membrane

KW - Perfluoro dioxolane

KW - Perfluoropolymer

KW - Poly(PFMDD-co-CTFE)

UR - http://www.scopus.com/inward/record.url?scp=84974625986&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84974625986&partnerID=8YFLogxK

U2 - 10.1016/j.jfluchem.2016.05.013

DO - 10.1016/j.jfluchem.2016.05.013

M3 - Article

AN - SCOPUS:84974625986

VL - 188

SP - 18

EP - 22

JO - Journal of Fluorine Chemistry

JF - Journal of Fluorine Chemistry

SN - 0022-1139

ER -