Exploring the potential of resorcinol-formaldehyde xerogels as thermal insulators

The contribution to the total thermal conductivity of porous materials depends mainly on the operating conditions and on its type of porosity. Accordingly, the thermal insulating capacities of several resorcinol-formaldehyde (RF) xerogels synthesized by microwave heating were investigated. First, th...

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Autores: Rey Raap, Natalia, Gómez Calvo, Esther, Menéndez Díaz, José Ángel, Arenillas de la Puente, Ana
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2017
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/145864
Acceso en línea:http://hdl.handle.net/10261/145864
Access Level:acceso abierto
Palabra clave:Resorcinol-formaldehyde xerogels
Pore size
Density
Thermal conductivity
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spelling Exploring the potential of resorcinol-formaldehyde xerogels as thermal insulatorsRey Raap, NataliaGómez Calvo, EstherMenéndez Díaz, José ÁngelArenillas de la Puente, AnaResorcinol-formaldehyde xerogelsPore sizeDensityThermal conductivityThe contribution to the total thermal conductivity of porous materials depends mainly on the operating conditions and on its type of porosity. Accordingly, the thermal insulating capacities of several resorcinol-formaldehyde (RF) xerogels synthesized by microwave heating were investigated. First, the operating conditions were optimized, since the thermal conductivity measurements were to be performed both before and after the degassing of the organic xerogels and with various particle sizes, ranging from 3 mm to below 212 μm. Special attention was paid to the influence of the porous properties, particularly density and pore size, on the total thermal conductivity. A minimum thermal conductivity value of 0.035 W m−1 K−1 was obtained for an organic xerogel with a bulk density of 0.248 g cm−3 and a mean pore size of 144 nm. The results obtained suggest that RF xerogels would be highly suitable candidates for thermal insulation applications as their thermal conductivity values are comparable to those of commercial materials, such as expanded polystyrene (0.034 W m−1 K−1).The authors gratefully acknowledge the financial support of the Ministerio de Economía y Competitividad of Spain, MINECO (Projects IPT-2012-0689-420000, CTQ2013-49433-EXP, CTQ2014-54772-P). NRR also acknowledges a predoctoral research grant from MINECO.Peer reviewedElsevierMinisterio de Economía y Competitividad (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201720172017info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/145864reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2014-54772-Pinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2013-49433-EXPhttp://dx.doi.org/10.1016/j.micromeso.2017.02.044Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1458642026-05-22T06:33:51Z
dc.title.none.fl_str_mv Exploring the potential of resorcinol-formaldehyde xerogels as thermal insulators
title Exploring the potential of resorcinol-formaldehyde xerogels as thermal insulators
spellingShingle Exploring the potential of resorcinol-formaldehyde xerogels as thermal insulators
Rey Raap, Natalia
Resorcinol-formaldehyde xerogels
Pore size
Density
Thermal conductivity
title_short Exploring the potential of resorcinol-formaldehyde xerogels as thermal insulators
title_full Exploring the potential of resorcinol-formaldehyde xerogels as thermal insulators
title_fullStr Exploring the potential of resorcinol-formaldehyde xerogels as thermal insulators
title_full_unstemmed Exploring the potential of resorcinol-formaldehyde xerogels as thermal insulators
title_sort Exploring the potential of resorcinol-formaldehyde xerogels as thermal insulators
dc.creator.none.fl_str_mv Rey Raap, Natalia
Gómez Calvo, Esther
Menéndez Díaz, José Ángel
Arenillas de la Puente, Ana
author Rey Raap, Natalia
author_facet Rey Raap, Natalia
Gómez Calvo, Esther
Menéndez Díaz, José Ángel
Arenillas de la Puente, Ana
author_role author
author2 Gómez Calvo, Esther
Menéndez Díaz, José Ángel
Arenillas de la Puente, Ana
author2_role author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Resorcinol-formaldehyde xerogels
Pore size
Density
Thermal conductivity
topic Resorcinol-formaldehyde xerogels
Pore size
Density
Thermal conductivity
description The contribution to the total thermal conductivity of porous materials depends mainly on the operating conditions and on its type of porosity. Accordingly, the thermal insulating capacities of several resorcinol-formaldehyde (RF) xerogels synthesized by microwave heating were investigated. First, the operating conditions were optimized, since the thermal conductivity measurements were to be performed both before and after the degassing of the organic xerogels and with various particle sizes, ranging from 3 mm to below 212 μm. Special attention was paid to the influence of the porous properties, particularly density and pore size, on the total thermal conductivity. A minimum thermal conductivity value of 0.035 W m−1 K−1 was obtained for an organic xerogel with a bulk density of 0.248 g cm−3 and a mean pore size of 144 nm. The results obtained suggest that RF xerogels would be highly suitable candidates for thermal insulation applications as their thermal conductivity values are comparable to those of commercial materials, such as expanded polystyrene (0.034 W m−1 K−1).
publishDate 2017
dc.date.none.fl_str_mv 2017
2017
2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/145864
url http://hdl.handle.net/10261/145864
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2014-54772-P
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2013-49433-EXP
http://dx.doi.org/10.1016/j.micromeso.2017.02.044
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
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