Recent progress in natural fiber reinforced composite as sound absorber material

Mohammadi, Majid; Taban, Ebrahim; Tan, Wei Hong; Che Din, Nazli Bin; Putra, Azma; Berardi, Umberto

doi:10.1016/j.jobe.2024.108514

Cited by 16 publications

(4 citation statements)

References 80 publications

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“…The use of a matrix and a reinforcement will depend on the final use that will be given to the composite material. Recently, there has been a great boom in using fibers of natural origin as reinforcements in various polymeric matrices since these fibers have important characteristics of resistance and biodegradability that make them more environmentally friendly when the composite material is discarded [3][4][5][6]. This is important to consider since, worldwide, there is a great problem of the poor disposal of plastic waste of synthetic origin derived from petroleum.…”

Section: Introductionmentioning

confidence: 99%

“…Despite the wide use of PP, research is constantly being carried out to improve its properties. Some examples of studies carried out on PP are those carried out with natural fibers such as milkweeds, sisals, agaves, olive pits, rice husks, jutes, and kenaf, among others [5,6]. In addition to this, PP has been reinforced with natural fibers on a nanometric scale such as cellulose nanocrystals (CNCs) [11,12].…”

Section: Introductionmentioning

confidence: 99%

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Polypropylene Composites Reinforced with Lignocellulose Nanocrystals of Corncob: Thermal and Mechanical Properties

Santos-Ventura,

Escalante-Álvarez,

González-Nuñez

et al. 2024

J. Compos. Sci.

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Composites based on recycled polypropylene (PP) reinforced with cellulose nanocrystals whit lignin corncob were prepared. The effect of the ratio composites prepared via a compression molding process on the mechanical and thermal properties was analyzed. Corncobs is a little-used agroindustrial residue with a high cellulose content. The corncob was milled and then delignified via the organosolve process in order to get the cellulose unbleached. An acid hydrolysis process was then carried out to obtain lignocellulose nanocrystals (LCNCs). Subsequently, LCNC/PP composites were obtained via termocompression molding using different concentrations of LCNC (0, 0.5, 1 and 2% by weight) previously mixed via extrusion. The residual lignin present in the LCNCs improved the compatibility between the reinforcement and the PP matrix. This was evidenced by the increase in mechanical properties and the stabilization of thermal properties. The results of the mechanical tests showed that the LCNC increases the tensile and flexural modules and strength with respect to neat PP. Composites with 2% of LCNC showed an increase of 36% and 43% in modulus and tensile strength, respectively, while the flexural modulus and strength increased by 7.6%. By using reinforcements of natural and residual origin (corncob) and improving the properties of recycled polymers, their reuse will increase, and this can lead to reducing waste in the environment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polypropylene Composites Reinforced with Lignocellulose Nanocrystals of Corncob: Thermal and Mechanical Properties

Santos-Ventura,

Escalante-Álvarez,

González-Nuñez

et al. 2024

J. Compos. Sci.

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show abstract

“…4,7,9−19 Various porous materials, spanning from natural fibers like cotton and wool to synthetic options such as foams and aerogels based on p o l y m e r s , a r e e m p l o y e d f o r n o i s e r e d u ction. [4][5][6]10,[13][14][15][18][19][20]22,23 These porous materials are extensively utilized for noise absorption due to their commendable p e r f o r m a n c e i n m e d i u m a n d h i g h -f r e q u e n c y ranges. [4][5][6]10,[13][14][15][18][19][20]22,23 However, the basic simple porous nature of these materials results in less effective absorption of low-frequency noise.…”

Section: ■ Introductionmentioning

confidence: 99%

“…[4][5][6]10,[13][14][15][18][19][20]22,23 These porous materials are extensively utilized for noise absorption due to their commendable p e r f o r m a n c e i n m e d i u m a n d h i g h -f r e q u e n c y ranges. [4][5][6]10,[13][14][15][18][19][20]22,23 However, the basic simple porous nature of these materials results in less effective absorption of low-frequency noise. To address this challenge, various methods have been developed, including increasing the density/thickness of materials and constructing 3D structures.…”

Section: ■ Introductionmentioning

confidence: 99%

Gradient Pore-Structured Polymeric Fibrous Aerogels for Effective Low-Frequency Noise Absorption

Suresh,

Amal Raj,

Parol M

et al. 2024

ACS Appl. Polym. Mater.

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Traffic and industry noise have been considered the most disturbing pollutants that induce severe health hazards to humans. Porous materials are commonly used for sound-mitigating applications; however, realizing high elasticity and sound-absorption ability at low frequencies has remained a great challenge. Herein, we report a strategy to create gradient-structured ultralight weight and elastic polymer-based fibrous aerogels by layer-by-layer assembly of polymer micro- and nanofibers in different combinations, utilizing step-by-step directional freezing and freeze-drying methods. This approach allowed us to integrate poly(ethylene terephthalate) microfibers (MF) and polyvinylidene fluoride nanofibers (NF) in different combinations, and the combination with MF/(MF and NF blend) MNF/NF units shows the best noise reduction coefficient of 0.66. Compared to the individual aerogels of MF, MNF, and NF, the gradient-structured fibrous aerogels show a better sound-absorption ability at low frequencies. The gradient-structured fibrous aerogels exhibit ultralightweight, elasticity, and good mechanical properties. The successful fabrication of these fascinating structures may provide innovative prospects for the utilization of used plastics for the production of low-frequency noise absorbers.

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Sound absorption properties and mechanism of multi‐layer micro‐perforated nanofiber membrane

Shao,

Yan

2024

Polymers for Advanced Techs

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Aiming at achieving low‐frequency and broadband sound absorption under the premise of light and thin layers, in this paper, polyvinyl butyral (PVB) nanofiber membranes were micro‐perforated and then combined sequentially to prepare multi‐layer micro‐perforated nanofiber membrane (MPNM) for acoustic noise reduction. It was demonstrated that the multi‐layer MPNM exhibited a high absorption (constantly over 50%) in the frequency of 480–2500 Hz. In addition, the established theoretical model of the sound absorbing coefficient can accurately predict the sound absorption performance of the structure with different layers, which can provide a theoretical foundation for the design of the structure of the nanofibrous membrane acoustic absorber. Based on the proposed acoustic model, the relationships between the absorption properties and the parameters were investigated, and it was found that the effective acoustic absorption frequency range and acoustic absorption coefficient curve of the multi‐layer MPNM were closely related to the size and arrangement of hole diameter, perforation rate, fiber membrane thickness, and cavity depth. Optimization of the structural parameters utilizing algorithms can achieve superior sound absorption performance, with an average absorption coefficient of 0.81 in the frequency of 100–2500 Hz. This study provides a theoretical and experimental basis for the development of low‐frequency sound‐absorbing materials and is of great significance for optimizing the acoustic performance of nanofiber membranes and expanding their applications in various acoustic engineering applications.

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Recent progress in natural fiber reinforced composite as sound absorber material

Cited by 16 publications

References 80 publications

Polypropylene Composites Reinforced with Lignocellulose Nanocrystals of Corncob: Thermal and Mechanical Properties

Polypropylene Composites Reinforced with Lignocellulose Nanocrystals of Corncob: Thermal and Mechanical Properties

Gradient Pore-Structured Polymeric Fibrous Aerogels for Effective Low-Frequency Noise Absorption

Sound absorption properties and mechanism of multi‐layer micro‐perforated nanofiber membrane

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