Porous lyocell powders as sound absorbers

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

doi:10.1007/s10570-018-2147-y

Porous lyocell powders as sound absorbers

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

^*Corresponding author for this work

Labor für Bauphysik (2071)

Research output: Contribution to journal › Article › peer-review

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.].

Original language	English
Journal	Cellulose
Early online date	24 Nov 2018
DOIs	https://doi.org/10.1007/s10570-018-2147-y
Publication status	E-pub ahead of print - 24 Nov 2018

Keywords

Acoustic absorption
Cellulose
Freeze-drying
Insulation material
Lyocell gel
Sound absorber

ASJC Scopus subject areas

Polymers and Plastics

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/s10570-018-2147-y

Cite this

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title = "Porous lyocell powders as sound absorbers",

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.].",

keywords = "Acoustic absorption, Cellulose, Freeze-drying, Insulation material, Lyocell gel, Sound absorber",

author = "Marco Beaumont and Blasius Buchegger and Plappert, {Sven F.} and Nedelec, {Jean Marie} and Martina Opietnik and Antje Potthast and Thomas Rosenau",

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doi = "10.1007/s10570-018-2147-y",

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T1 - Porous lyocell powders as sound absorbers

AU - Beaumont, Marco

AU - Buchegger, Blasius

AU - Plappert, Sven F.

AU - Nedelec, Jean Marie

AU - Opietnik, Martina

AU - Potthast, Antje

AU - Rosenau, Thomas

PY - 2018/11/24

Y1 - 2018/11/24

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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U2 - 10.1007/s10570-018-2147-y

DO - 10.1007/s10570-018-2147-y

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SN - 0969-0239

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JF - Cellulose

ER -

Porous lyocell powders as sound absorbers

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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