Glycolysis of advanced polyurethanes composites containing thermoregulating microcapsules

Rigid PU foams are properly recycled by a single-phase glycolysis process employing crude glycerol as transesterification agent. A high pure recovered polyol (71% of purity) was obtained using a mass ratio of PU scraps to crude glycerol of 1 to 1, a reaction temperature of 190 °C and stannous octoat...

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Autores: Simón Herrero, Diego, Rodríguez Romero, Juan Francisco, Carmona Franco, Manuel Salvador, Serrano Casero, Ángel, Borreguero Simón, Ana María
Tipo de recurso: artículo
Fecha de publicación:2018
País:España
Institución:Universidad de Castilla-La Mancha
Repositorio:RUIdeRA. Repositorio Institucional de la UCLM
OAI Identifier:oai:ruidera.uclm.es:10578/29963
Acceso en línea:http://hdl.handle.net/10578/29963
Access Level:acceso abierto
Palabra clave:Polyurethane
Chemical recycling
Polyol
Rigid foam
PCMs
Poliuretano
Reciclaje químico
Poliol
Espuma rígida
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spelling Glycolysis of advanced polyurethanes composites containing thermoregulating microcapsulesSimón Herrero, DiegoRodríguez Romero, Juan FranciscoCarmona Franco, Manuel SalvadorSerrano Casero, ÁngelBorreguero Simón, Ana MaríaPolyurethaneChemical recyclingPolyolRigid foamPCMsPoliuretanoReciclaje químicoPoliolEspuma rígidaPolyurethaneRigid PU foams are properly recycled by a single-phase glycolysis process employing crude glycerol as transesterification agent. A high pure recovered polyol (71% of purity) was obtained using a mass ratio of PU scraps to crude glycerol of 1 to 1, a reaction temperature of 190 °C and stannous octoate as catalyst in a 1.3 wt% concentration. PU foam composites containing thermoregulating microcapsules constituted by a paraffin core (Rubitherm®RT27) and a polymer shell material (LDPE and EVA) were glycolyzed, allowing to recover the microcapsules components and the polyol separately. This way, both components of the composite are recovered and can be reused in the manufacturing of new products; demonstrating for first time the viability of the chemical recycling of this kind of composites. Besides, the developed process was successfully applied for foams containing different proportions between the hard and soft segments, demonstrating its robustness. Finally, the recovered polyols were successfully employed to replace a raw rigid polyether polyol in the synthesis of new rigid PU foams. The most important physical and mechanical properties (density, maximum compressive strength and Young modulus) were maintained constant for the incorporation up to a 25 wt% of recovered polyol coming from conventional rigid PU foam scraps and up to a 37.5 wt% with the recovered polyol from rigid PU foam containing thermoregulating microcapsules. Regarding the effective thermal conductivity, it remained constant, even with 100 wt% of recovered polyol from PU scraps with thermoregulating microcapsules.Las espumas rígidas de PU se reciclan adecuadamente mediante un proceso de glucólisis de una sola fase que emplea glicerol crudo como agente de transesterificación. Se obtuvo un poliol recuperado de alta pureza (71 % de pureza) usando una relación de masa de desechos de PU a glicerol crudo de 1 a 1, una temperatura de reacción de 190 °C y octoato estannoso como catalizador en una concentración de 1,3 % en peso. Compuestos de espuma de PU que contenían microcápsulas termorreguladoras constituidas por un núcleo de parafina (Rubitherm®RT27) y un material de cubierta de polímero (LDPE y EVA) fueron glicolizados, lo que permitió recuperar los componentes de las microcápsulas y el poliol por separado. De esta forma, ambos componentes del composite se recuperan y pueden reutilizarse en la fabricación de nuevos productos; demostrando por primera vez la viabilidad del reciclaje químico de este tipo de composites. Además, el proceso desarrollado se aplicó con éxito para espumas que contenían diferentes proporciones entre los segmentos duros y blandos, demostrando su robustez. Finalmente, los polioles recuperados se emplearon con éxito para reemplazar un poliol de poliéter rígido crudo en la síntesis de nuevas espumas rígidas de PU. Las propiedades físicas y mecánicas más importantes (densidad, resistencia máxima a la compresión y módulo de Young) se mantuvieron constantes para la incorporación de hasta un 25 % en peso de poliol recuperado procedente de desechos de espuma de PU rígida convencional y hasta un 37,5 % en peso con el poliol recuperado. de espuma rígida de PU que contiene microcápsulas termorreguladoras. En cuanto a la conductividad térmica efectiva, se mantuvo constante, incluso con 100% en peso de poliol recuperado de desechos de PU con microcápsulas termorreguladoras.Elsevier202220222018info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttp://hdl.handle.net/10578/29963reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésinfo:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/299632026-05-27T07:36:41Z
dc.title.none.fl_str_mv Glycolysis of advanced polyurethanes composites containing thermoregulating microcapsules
title Glycolysis of advanced polyurethanes composites containing thermoregulating microcapsules
spellingShingle Glycolysis of advanced polyurethanes composites containing thermoregulating microcapsules
Simón Herrero, Diego
Polyurethane
Chemical recycling
Polyol
Rigid foam
PCMs
Poliuretano
Reciclaje químico
Poliol
Espuma rígida
Polyurethane
title_short Glycolysis of advanced polyurethanes composites containing thermoregulating microcapsules
title_full Glycolysis of advanced polyurethanes composites containing thermoregulating microcapsules
title_fullStr Glycolysis of advanced polyurethanes composites containing thermoregulating microcapsules
title_full_unstemmed Glycolysis of advanced polyurethanes composites containing thermoregulating microcapsules
title_sort Glycolysis of advanced polyurethanes composites containing thermoregulating microcapsules
dc.creator.none.fl_str_mv Simón Herrero, Diego
Rodríguez Romero, Juan Francisco
Carmona Franco, Manuel Salvador
Serrano Casero, Ángel
Borreguero Simón, Ana María
author Simón Herrero, Diego
author_facet Simón Herrero, Diego
Rodríguez Romero, Juan Francisco
Carmona Franco, Manuel Salvador
Serrano Casero, Ángel
Borreguero Simón, Ana María
author_role author
author2 Rodríguez Romero, Juan Francisco
Carmona Franco, Manuel Salvador
Serrano Casero, Ángel
Borreguero Simón, Ana María
author2_role author
author
author
author
dc.subject.none.fl_str_mv Polyurethane
Chemical recycling
Polyol
Rigid foam
PCMs
Poliuretano
Reciclaje químico
Poliol
Espuma rígida
Polyurethane
topic Polyurethane
Chemical recycling
Polyol
Rigid foam
PCMs
Poliuretano
Reciclaje químico
Poliol
Espuma rígida
Polyurethane
description Rigid PU foams are properly recycled by a single-phase glycolysis process employing crude glycerol as transesterification agent. A high pure recovered polyol (71% of purity) was obtained using a mass ratio of PU scraps to crude glycerol of 1 to 1, a reaction temperature of 190 °C and stannous octoate as catalyst in a 1.3 wt% concentration. PU foam composites containing thermoregulating microcapsules constituted by a paraffin core (Rubitherm®RT27) and a polymer shell material (LDPE and EVA) were glycolyzed, allowing to recover the microcapsules components and the polyol separately. This way, both components of the composite are recovered and can be reused in the manufacturing of new products; demonstrating for first time the viability of the chemical recycling of this kind of composites. Besides, the developed process was successfully applied for foams containing different proportions between the hard and soft segments, demonstrating its robustness. Finally, the recovered polyols were successfully employed to replace a raw rigid polyether polyol in the synthesis of new rigid PU foams. The most important physical and mechanical properties (density, maximum compressive strength and Young modulus) were maintained constant for the incorporation up to a 25 wt% of recovered polyol coming from conventional rigid PU foam scraps and up to a 37.5 wt% with the recovered polyol from rigid PU foam containing thermoregulating microcapsules. Regarding the effective thermal conductivity, it remained constant, even with 100 wt% of recovered polyol from PU scraps with thermoregulating microcapsules.
publishDate 2018
dc.date.none.fl_str_mv 2018
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10578/29963
url http://hdl.handle.net/10578/29963
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RUIdeRA. Repositorio Institucional de la UCLM
instname:Universidad de Castilla-La Mancha
instname_str Universidad de Castilla-La Mancha
reponame_str RUIdeRA. Repositorio Institucional de la UCLM
collection RUIdeRA. Repositorio Institucional de la UCLM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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