Ultralight graphene oxide/polyvinyl alcohol aerogel for broadband and tuneable acoustic properties

Abstract An ultralight graphene oxide (GO)/polyvinyl alcohol (PVA) aerogel (GPA) is proposed as a new class of acoustic materials with tuneable and broadband sound absorption and sound transmission losses. The interaction between GO sheets and PVA molecules is exploited in our environmentally friend...

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Autores principales:	Mario Rapisarda, Gian-Piero Malfense Fierro, Michele Meo
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b02d9497fc184bac87940dbc4fbb03e5
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spelling	oai:doaj.org-article:b02d9497fc184bac87940dbc4fbb03e52021-12-02T15:45:21ZUltralight graphene oxide/polyvinyl alcohol aerogel for broadband and tuneable acoustic properties10.1038/s41598-021-90101-02045-2322https://doaj.org/article/b02d9497fc184bac87940dbc4fbb03e52021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-90101-0https://doaj.org/toc/2045-2322Abstract An ultralight graphene oxide (GO)/polyvinyl alcohol (PVA) aerogel (GPA) is proposed as a new class of acoustic materials with tuneable and broadband sound absorption and sound transmission losses. The interaction between GO sheets and PVA molecules is exploited in our environmentally friendly manufacturing process to fabricate aerogels with hierarchical and tuneable porosity embedded in a honeycomb scaffold. The aerogels possess an enhanced ability to dissipate sound energy, with an extremely low density of 2.10 kg m−3, one of the lowest values ever reported for acoustic materials. We have first experimentally evaluated and optimised the effects of composition and thickness on the acoustic properties, namely sound absorption and sound transmission losses. Subsequently, we have employed a semi-analytical approach to evaluate the effect of different processing times on acoustic properties and assessed the relationships between the acoustic and non-acoustic properties of the materials. Over the 400–2500 Hz range, the reported average sound absorption coefficients are as high as 0.79, while the average sound transmission losses can reach 15.8 dB. We envisage that our subwavelength thin and light aerogel-based materials will possess other functional properties such as fire resistance and EMI shielding, and will prove to be novel acoustic materials for advanced engineering applications.Mario RapisardaGian-Piero Malfense FierroMichele MeoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mario Rapisarda Gian-Piero Malfense Fierro Michele Meo Ultralight graphene oxide/polyvinyl alcohol aerogel for broadband and tuneable acoustic properties
description	Abstract An ultralight graphene oxide (GO)/polyvinyl alcohol (PVA) aerogel (GPA) is proposed as a new class of acoustic materials with tuneable and broadband sound absorption and sound transmission losses. The interaction between GO sheets and PVA molecules is exploited in our environmentally friendly manufacturing process to fabricate aerogels with hierarchical and tuneable porosity embedded in a honeycomb scaffold. The aerogels possess an enhanced ability to dissipate sound energy, with an extremely low density of 2.10 kg m−3, one of the lowest values ever reported for acoustic materials. We have first experimentally evaluated and optimised the effects of composition and thickness on the acoustic properties, namely sound absorption and sound transmission losses. Subsequently, we have employed a semi-analytical approach to evaluate the effect of different processing times on acoustic properties and assessed the relationships between the acoustic and non-acoustic properties of the materials. Over the 400–2500 Hz range, the reported average sound absorption coefficients are as high as 0.79, while the average sound transmission losses can reach 15.8 dB. We envisage that our subwavelength thin and light aerogel-based materials will possess other functional properties such as fire resistance and EMI shielding, and will prove to be novel acoustic materials for advanced engineering applications.
format	article
author	Mario Rapisarda Gian-Piero Malfense Fierro Michele Meo
author_facet	Mario Rapisarda Gian-Piero Malfense Fierro Michele Meo
author_sort	Mario Rapisarda
title	Ultralight graphene oxide/polyvinyl alcohol aerogel for broadband and tuneable acoustic properties
title_short	Ultralight graphene oxide/polyvinyl alcohol aerogel for broadband and tuneable acoustic properties
title_full	Ultralight graphene oxide/polyvinyl alcohol aerogel for broadband and tuneable acoustic properties
title_fullStr	Ultralight graphene oxide/polyvinyl alcohol aerogel for broadband and tuneable acoustic properties
title_full_unstemmed	Ultralight graphene oxide/polyvinyl alcohol aerogel for broadband and tuneable acoustic properties
title_sort	ultralight graphene oxide/polyvinyl alcohol aerogel for broadband and tuneable acoustic properties
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b02d9497fc184bac87940dbc4fbb03e5
work_keys_str_mv	AT mariorapisarda ultralightgrapheneoxidepolyvinylalcoholaerogelforbroadbandandtuneableacousticproperties AT gianpieromalfensefierro ultralightgrapheneoxidepolyvinylalcoholaerogelforbroadbandandtuneableacousticproperties AT michelemeo ultralightgrapheneoxidepolyvinylalcoholaerogelforbroadbandandtuneableacousticproperties
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Ultralight graphene oxide/polyvinyl alcohol aerogel for broadband and tuneable acoustic properties

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