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Boosting the therma...
Boosting the thermal stability of emulsion–templated polymers via sulfonation : an efficient synthetic route to hierarchically porous carbon foams
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- Asfaw, Habtom D. (author)
- Uppsala universitet,Strukturkemi
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- Younesi, Reza (author)
- Uppsala universitet,Strukturkemi
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- Valvo, Mario (author)
- Uppsala universitet,Strukturkemi
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- Maibach, Julia (author)
- Uppsala universitet,Strukturkemi
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- Ångström, Jonas (author)
- Uppsala universitet,Strukturkemi
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- Tai, Cheuk-Wai (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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- Bacsik, Zoltan (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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- Sahlberg, Martin (author)
- Uppsala universitet,Oorganisk kemi
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- Nyholm, Leif (author)
- Uppsala universitet,Oorganisk kemi
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- Edström, Kristina (author)
- Uppsala universitet,Strukturkemi
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(creator_code:org_t)
- 2016-04-09
- 2016
- English.
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In: ChemistrySelect. - : Wiley. - 2365-6549. ; 1:4, s. 784-792
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- Hierarchically porous carbon foams with specific surface areas exceeding 600 m2 g−1 can be derived from polystyrene foams that are synthesized via water-in-oil emulsion templating. However, most styrene-based polymers lack strong crosslinks and are degraded to volatile products when heated above 400 oC. A common strategy employed to avert depolymerization is to introduce potential crosslinking sites such as sulfonic acids by sulfonating the polymers. This article unravels the thermal and chemical processes leading up to the conversion of sulfonated high internal phase emulsion polystyrenes (polyHIPEs) to sulfur containing carbon foams. During pyrolysis, the sulfonic acid groups (-SO3H) are transformed to sulfone (-C-SO2-C-) and then to thioether (-C−S-C-) crosslinks. These chemical transformations have been monitored using spectroscopic techniques: in situ IR, Raman, X-ray photoelectron and X-ray absorption near edge structure spectroscopy. Based on thermal analyses, the formation of thioether links is associated with increased thermal stability and thus a substantial decrease in volatilization of the polymers.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Keyword
- Emulsion-templated polymer
- sulfonation
- pyrolysis
- spectroscopy
- carbon foam
- Kemi med inriktning mot materialkemi
- Chemistry with specialization in Materials Chemistry
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Asfaw, Habtom D.
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Younesi, Reza
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Valvo, Mario
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Maibach, Julia
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Ångström, Jonas
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Tai, Cheuk-Wai
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show more...
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Bacsik, Zoltan
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Sahlberg, Martin
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Nyholm, Leif
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Edström, Kristin ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
- Articles in the publication
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ChemistrySelect
- By the university
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Uppsala University
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Stockholm University