BOKU - Universität für Bodenkultur Wien - Forschungsinformationssystem

Logo BOKU-Forschungsportal

Gewählte Publikation:

Beaumont, M; Buchegger, B; Plappert, SF; Nedelec, JM; Opietnik, M; Potthast, A; Rosenau, T.
(2019): Porous lyocell powders as sound absorbers
CELLULOSE. 2019; 26(2): 683-686. FullText FullText_BOKU

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 177m(2)/g. It featured a sound absorption maximum in the frequency range of one-third-octave bands of 400-800Hz (65mm 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. [GRAPHICS] .
Autor/innen der BOKU Wien:
Beaumont Marco
Potthast Antje
Rosenau Thomas
BOKU Gendermonitor:


Find related publications in this database (Keywords)
Acoustic absorption
Cellulose
Freeze-drying
Insulation material
Lyocell gel
Sound absorber


Altmetric:
© BOKU Wien Impressum