Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/87002
Título: | A comparative thermoacoustic insulation study of silica aerogels reinforced with reclaimed textile fibres: cotton, polyester and wool |
Autor(es): | Linhares, Teresa Conceição Amaral Carneiro, Vítor Hugo Pimenta Amorim, M. T. Pessoa de Durães, Luisa |
Palavras-chave: | Silica aerogel composites Aerogel reinforcement Thermoacoustic insulation Textile industry Reclaimed fibres |
Data: | 5-Jul-2023 |
Editora: | Multidisciplinary Digital Publishing Institute (MDPI) |
Revista: | Gels |
Citação: | Linhares, T.; Carneiro, V.H.; Pessoa de Amorim, M.T.; Durães, L. A Comparative Thermoacoustic Insulation Study of Silica Aerogels Reinforced with Reclaimed Textile Fibres: Cotton, Polyester and Wool. Gels 2023, 9, 548. https://doi.org/10.3390/gels9070548 |
Resumo(s): | Silica aerogels are highly porous materials with exceptional thermal insulation performance. They become even more attractive if combined thermal and acoustic insulation is achieved. Silica aerogel composites reinforced with fibres are an ingenious way to surpass the fragility stemmed from the aerogel’s intrinsic porosity, and textile fibres are good sound absorption materials. Reclaimed fibres are a relatively low-cost feedstock and were obtained in this work exclusively through mechanical processes from textile wastes, thus promoting the concept of circular economy, namely for cotton, polyester and wool fibres. These reclaimed fibres were used as reinforcement matrices for silica aerogel composites obtained from sol–gel transformation of tetraethyl orthosilicate and isobutyltriethoxysilane/or vinyltrimethoxysilane precursors and dried at ambient pressure after silylation. Silica aerogel composites reinforced with reclaimed cotton fibres had the best sound absorption coefficient (a peak value of 0.89), while the polyester-reinforced composite exhibited the lowest thermal conductivity (k = ~24 mW m−1 K−1, Hot Disk). The better combined results on thermal and acoustic insulation were achieved by the wool-reinforced composites. The thermal conductivity values were less than 27 mW m−1 K−1, and the sound absorption coefficient achieved a peak value of 0.85. Therefore, the aerogel composites developed here can be selected for thermal or/and acoustic barriers by choosing a suitable type of fibre. Their design and preparation protocol followed environmental-friendly and cost-effective approaches. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/87002 |
DOI: | 10.3390/gels9070548 |
e-ISSN: | 2310-2861 |
Versão da editora: | https://www.mdpi.com/2310-2861/9/7/548 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CMEMS - Artigos em revistas internacionais/Papers in international journals |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
gels-09-00548.pdf | 10,68 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons