Nonwoven fabrics developed from agriculture and industrial waste for acoustic and thermal applications

Abstract

Numerous researchers in the field of noise control and acoustics have found success in using biomaterials to create a porous sound absorber that is both effective and environmentally friendly. This paper discusses the utilization of fibers extracted from the waste from coffee husk (CH) and waste from the cotton (CO) spinning industry to be an alternative to synthetic-based acoustic materials. The study was conducted within the range of 50–6300 (Hz) frequency. Five well-known mathematical prediction models, namely Delany–Bazley (D–B), Garai–Pompoli (G–P), Miki, Allard Champoux (AC), and Johnson–Champoux–Allard (JCA) models are theoretically used to predict the sound absorption coefficient of nonwoven fibrous materials. When compared with the experimental data, it was discovered that the JCA and AC model is the most acceptable model for predicting the absorption behavior of CH/CO nonwoven fibrous materials. Additionally, the thermal insulation of nonwoven fibrous materials has been experimentally and numerically studied. It is noteworthy that, when compared to the Herman model, the Bhattacharyya model’s results showed slightly greater thermal conductivities. Overall, this work used an environmentally friendly way to turn waste into a valuable product.

Recent Advances in the Remediation of Textile-Dye-Containing Wastewater: Prioritizing Human Health and Sustainable Wastewater Treatment

“…In recent studies, researchers have shown that chitosan modified cellulosic non-woven fabric has superior color removal capabilities for Reactive Red 198 [147]. Additionally, these non-woven fabrics have shown great potential as materials for dye removal in the future [148,149].…”

Facile-Solution-Processed Silicon Nanofibers Formed on Recycled Cotton Nonwovens as Multifunctional Porous Sustainable Materials

“…Moreover, recycled polypropylene and polyester absorb sound at mid-range frequencies more efficiently owing to their inhomogeneity and micro voids [15]. However, it was found that acoustic performance is affected by the fiber type, fineness, density, bonding methods, airflow resistivity, and porosity of nonwovens [16,17]. Increasing the proportion of fibers with smaller diameters in a given layer (which decreases the air permeability) or increasing the thickness of a layer containing a given distribution of fiber diameters improves the sound absorption.…”

The Air Permeability and the Porosity of Polymer Materials Based on 3D-Printed Hybrid Non-Woven Needle-Punched Fabrics

“…Non-woven needle-punched materials (used for gas and liquid filtration [1][2][3][4], heat [4][5][6][7][8] and sound insulation [7][8][9][10][11], and road and hydraulic engineering construction [11][12][13][14], etc. ), must have high permeability and sufficient mechanical properties for practical uses that depend on the fabric's porosity [15].…”