Waste Biomass Valorisation for the Development of Sustainable Cellulosic Aerogels and their Sound Absorption Properties
Source abstract
Abstract
Abstract Novel and more sustainable sound absorbing materials are produced through the valorization of waste biomass sources by following circular economy principles. Cellulosic nanocrystals (CNC) were extracted from Posidonia oceanica dead leaves, spent barely grains, and kale stems using a simplified purification protocol. These nanocrystals are used to prepare cellulosic aerogels, evaluating the effect of three parameters, namely, concentration (0.5–4%), CaCl2 and poly(lactic acid) (PLA) incorporation (hybrid aerogels), on their sound absorption properties. Aerogels from 4% suspensions show the highest sound absorption, outperforming benchmark rockwool and polyester—two modern commonly‐used sound absorbers. Moreover, PLA coating also improves the sound absorption performance of the most aerogels. CNC from KS aerogels are selected as the optimum at both high (500–6000 Hz) and low (100–1500 Hz) frequency ranges. Overall, these results represent a new proof‐of‐concept of waste biomass conversion to high‐performance cellulosic aerogels that have excellent sound absorbing properties.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Aerogels and thermal insulation · Advanced Cellulose Research Studies · Acoustic Wave Phenomena Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Food Safety and Preservation Department IATA‐CSIC Avda. Agustín Escardino 7 Paterna Valencia 46980 Spain
Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy‐ Spanish National Research Council (SusPlast‐CSIC) Madrid Spain
Lumir Oy Linjatie 2 Vantaa 01260 Finland
Aalto Acoustics Lab Department of Signal Processing and Acoustics School of Electrical Engineering Aalto University P.O. Box 13100 Aalto 00076 Finland
Department of Chemistry and Materials Science Aalto University Kemistintie 1, 02150 Espoo/P.O. Box 16100 Aalto FI‐00076 Finland
Instituto de Investigación en Ciencias de la Alimentación CIAL (CSIC‐UAM) Nicolás Cabrera, 9 Madrid 28049 Spain
Funding
European Commission · European Regional Development Fund
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