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

doi:10.1016/j.memsci.2004.02.020

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

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

57 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 language	English
Pages (from-to)	163-169
Number of pages	7
Journal	Journal of Membrane Science
Volume	236
Issue number	1-2
DOIs	https://doi.org/10.1016/j.memsci.2004.02.020
Publication status	Published - 2004 Jun 15

Bibliographical note

Funding Information:
The authors acknowledge the financial support of the Ministry of Science and Technology of Korea through the Creative Research Initiatives program. Kookheon Char also acknowledges financial support from the National Research Laboratory Program (Grant M1-0104-00-0191) and the Ministry of Education through the Brain Korea 21 Program of Seoul National University.

All Science Journal Classification (ASJC) codes

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

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10.1016/j.memsci.2004.02.020

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title = "Highly stabilized silver polymer electrolytes and their application to facilitated olefin transport membranes",

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.",

author = "Kang, {Sang Wook} and Kim, {Jong Hak} and Oh, {Kyung Seok} and Jongok Won and Kookheon Char and Kim, {Hoon Sik} and Kang, {Yong Soo}",

note = "Funding Information: The authors acknowledge the financial support of the Ministry of Science and Technology of Korea through the Creative Research Initiatives program. Kookheon Char also acknowledges financial support from the National Research Laboratory Program (Grant M1-0104-00-0191) and the Ministry of Education through the Brain Korea 21 Program of Seoul National University.",

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doi = "10.1016/j.memsci.2004.02.020",

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T1 - Highly stabilized silver polymer electrolytes and their application to facilitated olefin transport membranes

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

N1 - Funding Information: The authors acknowledge the financial support of the Ministry of Science and Technology of Korea through the Creative Research Initiatives program. Kookheon Char also acknowledges financial support from the National Research Laboratory Program (Grant M1-0104-00-0191) and the Ministry of Education through the Brain Korea 21 Program of Seoul National University.

PY - 2004/6/15

Y1 - 2004/6/15

N2 - 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.

AB - 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

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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