Highly stabilized silver polymer electrolytes and their application to facilitated olefin transport membranes

Sang Wook Kang, Jong Hak Kim, Kyung Seok Oh, Jongok Won, Kookheon Char, Hoon Sik Kim, Yong Soo Kang

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Polymer electrolyte membranes consisting of AgBF4 dissolved in poly(ethylene phthalate) (PEP) exhibit significantly better long-term stability of performance in the separation of propylene/propane mixtures than AgBF 4 in poly(2-ethyl-2-oxazoline) (POZ) membranes. This improvement in stability is due to the suppression of the reduction of silver ions to silver metal nanoparticles by the formation of stable chelates between the phthalic groups of PEP and silver ions, which was confirmed by the observation of a large shift of the PEP C=O stretching band with the addition of AgBF4; the peak shift for PEP/AgBF4 is twice that for POZ/AgBF4. Transmission electron micrograph (TEM) results confirmed that the rate of silver metal nanoparticle formation in PEP/AgBF4 is significantly lower than that in POZ/AgBF4. We conclude that the strong coordination between phthalic groups in PEP and silver ions which results in the formation of stable chelates is of pivotal importance in preventing the reduction of silver ions to silver metal and consequently in improving the performance of the membrane in the separation of propylene/propane mixtures.

Original languageEnglish
Pages (from-to)163-169
Number of pages7
JournalJournal of Membrane Science
Volume236
Issue number1-2
DOIs
Publication statusPublished - 2004 Jun 15

Fingerprint

Alkenes
Silver
Electrolytes
alkenes
Olefins
Polymers
silver
electrolytes
membranes
Membranes
polymers
Metal Nanoparticles
Ions
Propane
Metal nanoparticles
propylene
chelates
propane
Propylene
ions

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

Cite this

Kang, Sang Wook ; Kim, Jong Hak ; Oh, Kyung Seok ; Won, Jongok ; Char, Kookheon ; Kim, Hoon Sik ; Kang, Yong Soo. / Highly stabilized silver polymer electrolytes and their application to facilitated olefin transport membranes. In: Journal of Membrane Science. 2004 ; Vol. 236, No. 1-2. pp. 163-169.
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abstract = "Polymer electrolyte membranes consisting of AgBF4 dissolved in poly(ethylene phthalate) (PEP) exhibit significantly better long-term stability of performance in the separation of propylene/propane mixtures than AgBF 4 in poly(2-ethyl-2-oxazoline) (POZ) membranes. This improvement in stability is due to the suppression of the reduction of silver ions to silver metal nanoparticles by the formation of stable chelates between the phthalic groups of PEP and silver ions, which was confirmed by the observation of a large shift of the PEP C=O stretching band with the addition of AgBF4; the peak shift for PEP/AgBF4 is twice that for POZ/AgBF4. Transmission electron micrograph (TEM) results confirmed that the rate of silver metal nanoparticle formation in PEP/AgBF4 is significantly lower than that in POZ/AgBF4. We conclude that the strong coordination between phthalic groups in PEP and silver ions which results in the formation of stable chelates is of pivotal importance in preventing the reduction of silver ions to silver metal and consequently in improving the performance of the membrane in the separation of propylene/propane mixtures.",
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Highly stabilized silver polymer electrolytes and their application to facilitated olefin transport membranes. / Kang, Sang Wook; Kim, Jong Hak; Oh, Kyung Seok; Won, Jongok; Char, Kookheon; Kim, Hoon Sik; Kang, Yong Soo.

In: Journal of Membrane Science, Vol. 236, No. 1-2, 15.06.2004, p. 163-169.

Research output: Contribution to journalArticle

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AU - Kang, Sang Wook

AU - Kim, Jong Hak

AU - Oh, Kyung Seok

AU - Won, Jongok

AU - Char, Kookheon

AU - Kim, Hoon Sik

AU - Kang, Yong Soo

PY - 2004/6/15

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