Enhanced acoustic damping in flexible polyurethane foams filled with carbon nanotubes

Verdejo, Raquel; Stämpfli, Rolf; Álvarez-Láinez, Mónica; Mourad, Safer; Rodríguez‐Pérez, Miguel Ángel; Brühwiler, Paul A.; Shaffer, Milo S. P.

doi:10.1016/j.compscitech.2008.07.003

Cited by 290 publications

(236 citation statements)

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“…Research of Verdejo et al [10] revealed that acoustic waves can be scattered by interfacial sliding and stick-slip behaviour even in the presence of some covalent bonds. It was also defined that damping effects are attributed to the large surface area at the polymer-carbon nanotube interface.…”

Section: Noise Protection By Coatingsmentioning

confidence: 99%

Adaptive Noise Reduction System

Ropuš¹,

Alar²,

Runje³

2013

: Interdiscip. Descr. Complex Syst.

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Noise is an all-present environment pollutant, considered to be one of the greatest contemporary pollutants. World-wide, co-ordinated actions are conducted in order to develop systems which minimise the noise influence onto society.In this article we argue that novel approach to suppression of influence of noise is useful. Furthermore, we argue that the efficient approach is formulation of the efficient, broadly applicable, ubiquituous, adaptive noise-protection system. The approach combines the natural noise-protection form based on plants with the artificially formed coatings.Elements of the system are discussed, its formation and maintenance analysed and perspectives conjectured.

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Section: Noise Protection By Coatingsmentioning

confidence: 99%

Adaptive Noise Reduction System

Ropuš¹,

Alar²,

Runje³

2013

: Interdiscip. Descr. Complex Syst.

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“…In this case and in flexible PU foams, the incorporation of nanoparticles increase foam density as well as improve compression and tear properties [7] . Literature survey reveals the application of well-known NPs in the flexible foam formulations namely, fumed silica [8] , calcium carbonate [7] , nanofibers [9] , carbon nanotubes [9,10] , zinc borate, phosphorous and expandable graphite [11] in order to improving of thermal, mechanical, acoustic and flame retardancy properties, respectively because of the high performances of nanoparticles in improving of target properties [12] . Above all, the roles of inorganic such as magnetic iron oxide NP's (MNP's) by having unique and high performances are undeniable.…”

Section: Introductionmentioning

confidence: 99%

Preparation of novel magnetic polyurethane foam nanocomposites by using core-shell nanoparticles

2016

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SbstractIron oxide magnetic nanoparticles (NP's) converted to the core-shell structres by reacting with by n-(2-aminoethyl)-3-aminopropyl trimethoxysilane (AEAP) incorporated in polyurethane flexible (PUF) foam formulations. Fourier transform spectra, thermal gravimetric analysis, scanning electron images, thermo-mechanical analysis and magnetic properties of the prepared nanocomposites were studied. Obtained data shown that by the increasing of the amine modified magnetic iron oxide NP's up to 3% in the polymer matrix, thermal and magnetic properties improved in comparison with pristine foams. In addition, due to the presence of functional groups on the magnetic NP's surface, hard phases formation decrease in the bulk polymer and cause decreasing of glass transition temperature.

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“…In addition to the viscosity, other factors that could influence the increase of the cell size in flexible PU foams due to the presence of CNPs are: cell coalescence, polymer gelation and the surface functionality of the nanotubes. [121,122] On the other hand, the inclusion of CNPs in rigid PU foams has similar effects as those observed in thermoplastic foams. You et al [123] observed that the reduction in cell size in rigid PU foams is more effective for low loadings of MWCNTs (up to 0.1 phpp).…”

Section: Morphologymentioning

confidence: 68%

“…Verdejo et al studied the effects of CNTs on the acoustic attenuation activity [121] and the potential application in tissue engineering and biomedical implants [141] of reactive PU foams. They observed that, on addition of CNTs, the acoustic absorption of the system improved over the entire frequency range.…”

Section: Other Propertiesmentioning

confidence: 99%

“…In flexible PU foams it has been reported an increase on the cell size due to the presence of CNPs. [121] The addition of the carbon nanotubes increased the initial viscosity of the mixtures, having a detrimental effect on the foaming and the final cellular structure of the systems. The lower foaming rate observed enabled the diffusion of gas from small to larger cells driven by the free energy of the system.…”

Section: Morphologymentioning

confidence: 99%

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Estudio de Nanocompuestos de Espumas de Poliuretano Reforzadas con Nanocargas en Base Carbono

Bernal¹,

Mar²

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A la meua familia AGRADECIMIENTOSQuisiera agradecer, en primer lugar, al Ministerio de Ciencia e Investigación por la financiación para la realización de esta Tesis, mediante la concesión de la Beca FPI.A mis directores de Tesis, Dra. Raquel Verdejo y Dr. Miguel Ángel López Manchado por darme la oportunidad de trabajar con vosotros. A Raquel, por todo lo que me has enseñado durante estos años y por todo el tiempo que me has dedicado. A Miguel Ángel por tus comentarios constructivos, tus consejos y tu paciencia.A mi tutor en la UPV, Prof. Vicente Amigò por toda la ayuda que me has brindado sin apenas conocerme.Al Prof. Miguel Ángel Rodríguez Pérez de la Universidad de Valladolid por darme la posibilidad de trabajar en tu grupo y aprender más sobre espumas.I would like to thank Prof. Anthony J. Ryan, from The University of Sheffield, and Prof. Isabelle Huynen, from Université Catholique de Louvain, for your support and interest on my work.A todos mis compañeros del grupo por todos los ánimos y las risas. A Mario, Lean, Laura Peponi, Nicoletta, Iván y Sami. A mis chicas, Nella, Nat y Lauris, por todos los buenos momentos juntas entre recetas de cocina, clases de punto y bailes Bollywood! Quiero agradecer especialmente a Nella por ser mi profesora de la vida durante estos años y por las largas tardes-noches compartidas en la oficina. Y a Mario, nuestro "chico guapo" por todo el apoyo y por esas "características limitantes" que nos unen.A todo el grupo de Cauchos, en especial a Juan, Irene, Marta y Pilar, por ser como sois y por todas esas celebraciones en el laboratorio con vino, callos, migas y pasteles. Y a Miguel Arroyo, por esas paellas "madrileñas" que me hacen sentir como en casa.A Rodri, Jose e Isabel Quijada por haberme dejado participar en vuestros trabajos, por todo lo que he aprendido con vosotros y por haber confiado en mí.Al grupo del CellMat de la Universidad de Valladolid por haberme acogido tan bien durante las semanas que he estado con vosotros. En especial a Samu, Sergio y a Eusebio por vuestra colaboración en mis experimentos de radioscopia y DMA.I would like to thank my dear friends Masa, AC and Susi, for our great times in Sheffield.A special thanks to Isabel and Margherita for taking care of me during those hard months in Louvain-la-Neuve and for your friendship. Grazie Margheri per le nostre pause caffè e tutti gli scherzi! A todos mis amigos que me habéis apoyado durante este tiempo y, aunque en "la terreta" siempre os he tenido cerca. Y gracias a todas las personas que me han ayudado durante estos años. RESUMENLas espumas de nanocompuestos poliméricos tienen un gran interés tanto en áreas tecnológicas como científicas. Esto es debido a la combinación de las excelentes propiedades de las nanopartículas y la tecnología de espumado, dando lugar al desarrollo de materiales ligeros y multifuncionales. Este tipo de sistemas se utilizan en aplicaciones de alto rendimiento tan diversas como biomedicina, electrónica, paneles estructurales y embalajes, entre otras.Esta Tesis está basada en el desarro...

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Enhanced acoustic damping in flexible polyurethane foams filled with carbon nanotubes

Cited by 290 publications

References 50 publications

Adaptive Noise Reduction System

Adaptive Noise Reduction System

Preparation of novel magnetic polyurethane foam nanocomposites by using core-shell nanoparticles

Estudio de Nanocompuestos de Espumas de Poliuretano Reforzadas con Nanocargas en Base Carbono

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