An underrated variable essential for tailoring the structure of xerogel: the methanol content of commercial formaldehyde solutions
Resorcinol-formaldehyde xerogels are polymers whose porosity can be designed for a specific application by the selection of appropriate physical and chemical synthesis variables. Until recently, the methanol content of commercial formaldehyde solutions has never been considered as a chemical variable that must also be taken into account. However, it has been demonstrated that the proportion of methanol might be even more important than other variables for tailoring the porosity of xerogels. Different reaction mechanisms are proposed to explain this heavy dependence of the final structure of RF xerogels. Organic and carbon xerogels synthesized with low concentrations of methanol showed a higher porosity with much larger pore sizes (up to two orders of magnitude) than when using formaldehyde with high concentrations of methanol. This means that extra caution needs to be shown in choosing these commercial products since formaldehyde solutions differ greatly in methanol content from one supplier to another.
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Format: | artículo biblioteca |
Language: | English |
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Springer
2017-05-17
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Subjects: | Xerogel, Formaldehyde, Methanol, Controlled porosity, |
Online Access: | http://hdl.handle.net/10261/152483 http://dx.doi.org/10.13039/501100003329 |
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dig-incar-es-10261-1524832018-11-15T12:18:08Z An underrated variable essential for tailoring the structure of xerogel: the methanol content of commercial formaldehyde solutions Díaz Alonso-Buenaposada, Isabel Garrido, Leoncio Montes Morán, Miguel Ángel Menéndez Díaz, José Ángel Arenillas de la Puente, Ana Ministerio de Economía y Competitividad (España) Xerogel Formaldehyde Methanol Controlled porosity Resorcinol-formaldehyde xerogels are polymers whose porosity can be designed for a specific application by the selection of appropriate physical and chemical synthesis variables. Until recently, the methanol content of commercial formaldehyde solutions has never been considered as a chemical variable that must also be taken into account. However, it has been demonstrated that the proportion of methanol might be even more important than other variables for tailoring the porosity of xerogels. Different reaction mechanisms are proposed to explain this heavy dependence of the final structure of RF xerogels. Organic and carbon xerogels synthesized with low concentrations of methanol showed a higher porosity with much larger pore sizes (up to two orders of magnitude) than when using formaldehyde with high concentrations of methanol. This means that extra caution needs to be shown in choosing these commercial products since formaldehyde solutions differ greatly in methanol content from one supplier to another. The authors gratefully acknowledge the financial support of the Ministerio de Economía y Competitividad of Spain, MINECO (Projects CTQ2014-54772-P) Peer reviewed 2017-07-07T10:41:56Z 2017-07-07T10:41:56Z 2017-05-17 artículo http://purl.org/coar/resource_type/c_6501 Journal of Sol-Gel Science and Technology 83(2): 478-488 (2017) 0928-0707 http://hdl.handle.net/10261/152483 10.1007/s10971-017-4405-0 1573-4846 http://dx.doi.org/10.13039/501100003329 en #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2014-54772-P Postprint http://dx.doi.org/10.1007/s10971-017-4405-0 Sí open Springer |
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Xerogel Formaldehyde Methanol Controlled porosity Xerogel Formaldehyde Methanol Controlled porosity |
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Xerogel Formaldehyde Methanol Controlled porosity Xerogel Formaldehyde Methanol Controlled porosity Díaz Alonso-Buenaposada, Isabel Garrido, Leoncio Montes Morán, Miguel Ángel Menéndez Díaz, José Ángel Arenillas de la Puente, Ana An underrated variable essential for tailoring the structure of xerogel: the methanol content of commercial formaldehyde solutions |
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Resorcinol-formaldehyde xerogels are polymers whose porosity can be designed for a specific application by the selection of appropriate physical and chemical synthesis variables. Until recently, the methanol content of commercial formaldehyde solutions has never been considered as a chemical variable that must also be taken into account. However, it has been demonstrated that the proportion of methanol might be even more important than other variables for tailoring the porosity of xerogels. Different reaction mechanisms are proposed to explain this heavy dependence of the final structure of RF xerogels. Organic and carbon xerogels synthesized with low concentrations of methanol showed a higher porosity with much larger pore sizes (up to two orders of magnitude) than when using formaldehyde with high concentrations of methanol. This means that extra caution needs to be shown in choosing these commercial products since formaldehyde solutions differ greatly in methanol content from one supplier to another. |
author2 |
Ministerio de Economía y Competitividad (España) |
author_facet |
Ministerio de Economía y Competitividad (España) Díaz Alonso-Buenaposada, Isabel Garrido, Leoncio Montes Morán, Miguel Ángel Menéndez Díaz, José Ángel Arenillas de la Puente, Ana |
format |
artículo |
topic_facet |
Xerogel Formaldehyde Methanol Controlled porosity |
author |
Díaz Alonso-Buenaposada, Isabel Garrido, Leoncio Montes Morán, Miguel Ángel Menéndez Díaz, José Ángel Arenillas de la Puente, Ana |
author_sort |
Díaz Alonso-Buenaposada, Isabel |
title |
An underrated variable essential for tailoring the structure of xerogel: the methanol content of commercial formaldehyde solutions |
title_short |
An underrated variable essential for tailoring the structure of xerogel: the methanol content of commercial formaldehyde solutions |
title_full |
An underrated variable essential for tailoring the structure of xerogel: the methanol content of commercial formaldehyde solutions |
title_fullStr |
An underrated variable essential for tailoring the structure of xerogel: the methanol content of commercial formaldehyde solutions |
title_full_unstemmed |
An underrated variable essential for tailoring the structure of xerogel: the methanol content of commercial formaldehyde solutions |
title_sort |
underrated variable essential for tailoring the structure of xerogel: the methanol content of commercial formaldehyde solutions |
publisher |
Springer |
publishDate |
2017-05-17 |
url |
http://hdl.handle.net/10261/152483 http://dx.doi.org/10.13039/501100003329 |
work_keys_str_mv |
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