Porous lyocell powders as sound absorbers

Marco Beaumont, Blasius Buchegger, Sven F. Plappert, Jean Marie Nedelec, Martina Opietnik, Antje Potthast, Thomas Rosenau

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Abstract

Abstract: Environmentally friendly insulation materials based on renewable resources come more and more to the fore, replacing less sustainable materials, such as mineral wool or polystyrene foams. In this study, we present a straight-forward avenue to a highly porous cellulose II powder for application as sound absorber. The material was prepared from a lyocell-derived cellulose II gel by a freeze-drying approach. The powder has a porosity of 98% and a specific surface area of 177 m2/g. It featured a sound absorption maximum in the frequency range of one-third-octave bands of 400–800 Hz (65 mm thickness) and was significantly more efficient as acoustic insulation material than commercial alternatives. The high performance makes the cellulose II sound absorber especially attractive for a use in loudspeakers for small electronics. Graphical Abstract: [Figure not available: see fulltext.].

Originalspracheenglisch
FachzeitschriftCellulose
Frühes Online-Datum24 Nov 2018
DOIs
PublikationsstatusElektronische Veröffentlichung vor Drucklegung. - 24 Nov 2018

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Powders
Acoustic waves
Cellulose
Mineral wool
Sound insulation
Loudspeakers
Polystyrenes
Specific surface area
Foams
Insulation
Drying
Electronic equipment
Gels
Porosity

Schlagwörter

    ASJC Scopus subject areas

    • !!Polymers and Plastics

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    Beaumont, M., Buchegger, B., Plappert, S. F., Nedelec, J. M., Opietnik, M., Potthast, A., & Rosenau, T. (2018). Porous lyocell powders as sound absorbers. Cellulose. https://doi.org/10.1007/s10570-018-2147-y

    Porous lyocell powders as sound absorbers. / Beaumont, Marco; Buchegger, Blasius; Plappert, Sven F.; Nedelec, Jean Marie; Opietnik, Martina; Potthast, Antje; Rosenau, Thomas.

    in: Cellulose, 24.11.2018.

    Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

    Beaumont, M, Buchegger, B, Plappert, SF, Nedelec, JM, Opietnik, M, Potthast, A & Rosenau, T 2018, 'Porous lyocell powders as sound absorbers' Cellulose. https://doi.org/10.1007/s10570-018-2147-y
    Beaumont M, Buchegger B, Plappert SF, Nedelec JM, Opietnik M, Potthast A et al. Porous lyocell powders as sound absorbers. Cellulose. 2018 Nov 24. https://doi.org/10.1007/s10570-018-2147-y
    Beaumont, Marco ; Buchegger, Blasius ; Plappert, Sven F. ; Nedelec, Jean Marie ; Opietnik, Martina ; Potthast, Antje ; Rosenau, Thomas. / Porous lyocell powders as sound absorbers. in: Cellulose. 2018.
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    abstract = "Abstract: Environmentally friendly insulation materials based on renewable resources come more and more to the fore, replacing less sustainable materials, such as mineral wool or polystyrene foams. In this study, we present a straight-forward avenue to a highly porous cellulose II powder for application as sound absorber. The material was prepared from a lyocell-derived cellulose II gel by a freeze-drying approach. The powder has a porosity of 98{\%} and a specific surface area of 177 m2/g. It featured a sound absorption maximum in the frequency range of one-third-octave bands of 400–800 Hz (65 mm thickness) and was significantly more efficient as acoustic insulation material than commercial alternatives. The high performance makes the cellulose II sound absorber especially attractive for a use in loudspeakers for small electronics. Graphical Abstract: [Figure not available: see fulltext.].",
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    AU - Beaumont, Marco

    AU - Buchegger, Blasius

    AU - Plappert, Sven F.

    AU - Nedelec, Jean Marie

    AU - Opietnik, Martina

    AU - Potthast, Antje

    AU - Rosenau, Thomas

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    N2 - Abstract: Environmentally friendly insulation materials based on renewable resources come more and more to the fore, replacing less sustainable materials, such as mineral wool or polystyrene foams. In this study, we present a straight-forward avenue to a highly porous cellulose II powder for application as sound absorber. The material was prepared from a lyocell-derived cellulose II gel by a freeze-drying approach. The powder has a porosity of 98% and a specific surface area of 177 m2/g. It featured a sound absorption maximum in the frequency range of one-third-octave bands of 400–800 Hz (65 mm thickness) and was significantly more efficient as acoustic insulation material than commercial alternatives. The high performance makes the cellulose II sound absorber especially attractive for a use in loudspeakers for small electronics. Graphical Abstract: [Figure not available: see fulltext.].

    AB - Abstract: Environmentally friendly insulation materials based on renewable resources come more and more to the fore, replacing less sustainable materials, such as mineral wool or polystyrene foams. In this study, we present a straight-forward avenue to a highly porous cellulose II powder for application as sound absorber. The material was prepared from a lyocell-derived cellulose II gel by a freeze-drying approach. The powder has a porosity of 98% and a specific surface area of 177 m2/g. It featured a sound absorption maximum in the frequency range of one-third-octave bands of 400–800 Hz (65 mm thickness) and was significantly more efficient as acoustic insulation material than commercial alternatives. The high performance makes the cellulose II sound absorber especially attractive for a use in loudspeakers for small electronics. Graphical Abstract: [Figure not available: see fulltext.].

    KW - Acoustic absorption

    KW - Cellulose

    KW - Freeze-drying

    KW - Insulation material

    KW - Lyocell gel

    KW - Sound absorber

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