Sound absorption properties of nanofiber membrane-based multi-layer composites

Shao, Xiaofei; Yan, Xiong

doi:10.1016/j.apacoust.2022.109029

Cited by 10 publications

(6 citation statements)

References 23 publications

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“…Though having a high porosity, its overall acoustic performance is poor. At the same thickness of the nanofiber felt, a similar work previously reported where the thinner layer of the composite is made of PVB nanofiber membrane (0.5 mm) laminated on a 10-mm-thick PET nonwoven felt showed a maximum SAC of ∼0.8 at 1250 Hz . Nanofibers typically deposited as thin mats or membranes such as the one just mentioned above are limited to the absorption of low frequency sound waves.…”

Section: Results and Discussionsupporting

confidence: 56%

“…At the same thickness of the nanofiber felt, a similar work previously reported where the thinner layer of the composite is made of PVB nanofiber membrane (0.5 mm) laminated on a 10-mm-thick PET nonwoven felt showed a maximum SAC of ∼0.8 at 1250 Hz. 43 Nanofibers typically deposited as thin mats or membranes such as the one just mentioned above are limited to the absorption of low frequency sound waves. By changing the microscopic or spatial structure, these nanofibers can be turned into excellent sound absorption materials.…”

Section: Resultsmentioning

confidence: 99%

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Enhanced Low Frequency Sound Absorption of Bilayer Nanocomposite Acoustic Absorber Laminated with Microperforated Nanofiber Felt

Puguan,

Agbayani,

Sadural

et al. 2023

ACS Appl. Polym. Mater.

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A laminar nanocomposite sound absorber was fabricated by laminating a microperforated nanofiber felt (MPNF) on a reinforced nanofibrous cryogel. The spatial morphology of both dense and porous nanofiber layers combined with the microperforations employed on the dense layer delivered a sound absorption average (SAA) rating of 0.61. A lower frequency average sound absorption coefficient of 0.56 was achieved when a denser nanofiber felt layer with the incorporation of 1.78% microperforation rate was employed. A highly porous cryogel layer permits excellent mid- and high-frequency absorption coefficients of 0.74 and 0.51, respectively. The nanocomposite sound absorber has a remarkable areal density of 771 g m–2, making it lightweight and less bulky ideal for acoustic building material. The perforated nanofiber felt, however, has a minimal effect on the sound transmission coefficient (STC) of the nanocomposite sound absorber with an STC of 6.75 dB. By tuning the perforation diameter, perforation rate, and thickness of the nanofiber felt, the overall acoustic absorption performance of the nanocomposite sound absorber can be improved.

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Section: Results and Discussionsupporting

confidence: 56%

Section: Resultsmentioning

confidence: 99%

Enhanced Low Frequency Sound Absorption of Bilayer Nanocomposite Acoustic Absorber Laminated with Microperforated Nanofiber Felt

Puguan,

Agbayani,

Sadural

et al. 2023

ACS Appl. Polym. Mater.

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“…Second, it is highly recyclable, which can contribute to environmentally friendly carbon reduction. Third, PET is lightweight, strong, and has excellent physical properties and high durability [6,[25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Study on the Sound Absorption Properties of Recycled Polyester Nonwovens through Alkaline Treatment and Dimple Processing

Yu,

Park,

Kang

et al. 2024

Surfaces

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This study focused on manufacturing efficient automobile sound-absorbing materials through alkaline treatment and dimple processing of recycled polyethylene terephthalate (rPET) nonwoven fabric. The rPET nonwoven fabric was produced with a sound-absorbing material through compression molding. It was improved through the development of porous sound-absorbing materials through alkaline treatment and resonant sound-absorbing materials through dimple processing. As a result of morphological analysis, alkaline treatment showed that pore size and air permeability increased according to temperature and concentration increase conditions. On the other hand, dimple processing caused a decrease in air permeability and a decrease in pores due to yarn fusion, and as the dimple diameter increased, the sound-absorbing coefficient increased in the 5000 Hz band. Finally, it was judged that effective sound absorption performance would be improved through a simple process through alkaline treatment and dimple processing, and thus there would be applicability in various industrial fields.

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“…In addition, introducing heterogeneous components into foam materials is an effective route to enhance sound absorption, which uses reflection of sound waves at different interfaces to improve sound dissipation. , Qiao et al filled and exposed boron nitride nanosheets on polydimethylsiloxane (PDMS) pore frameworks to change the pore walls of the original PDMS foams (SFs) . The adsorption half-peak width of the modified BSF-9 was 1213 Hz wider than that of the blank SFs (1367 Hz), and the overall absorption region almost covered the absorption peak of SFs.…”

Section: Introductionmentioning

confidence: 99%

Formation of Interpenetrating-Phase Composites Based on the Combined Effects of Open-Cell PIF and Porous TPU Microstructures for Enhanced Mechanical and Acoustical Characteristics

Ren,

Wang,

Sun

et al. 2023

ACS Appl. Polym. Mater.

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The open-cell foam is a highly preferred soundabsorbing material used for improving indoor sound quality. Herein, polyimide foam (PIF) with an open-cell structure was synthesized through the introduction of oxalic acid dihydrate (H 2 C 2 O 4 •2H 2 O). The introduction and subsequent decomposition of H 2 C 2 O 4 •2H 2 O provided additional heterogeneous nucleation sites during foaming and promoted the formation of open-cell structures. The relation between H 2 C 2 O 4 •2H 2 O content and pore structure, the formation mechanism of open-cell structures, and the effect of H 2 C 2 O 4 •2H 2 O content on the sound absorption performance were analyzed. Furthermore, interpenetrating-phase thermoplastic polyurethane (TPU)/PIF composites were prepared via non-solvent-induced phase separation on the basis of the open-cell PIF. The formation of porous TPU microstructures and improvement of mechanical and acoustic properties of the interpenetrating-phase composites were discussed. Two main forms of TPU existed in the interpenetrating composites: microparticle TPU structure and microporous TPU structure. The compression strength (125.54 kPa) and sound insulation capacity of 10%TPU/PIF3 were 3.47 and approximately 5 times those of open-cell PIF3, respectively. Moreover, the average sound absorption coefficient (1000−6400 Hz) increased by 58.43% compared to that of opencell PIF3. The design based on the open-cell PIF promoted the enrichment of internal channels, and the construction of the internal channels with porous TPU microstructures achieved reflection enhancement and viscoelastic damping dissipation. Finally, the combined effects of the two designs synchronously enhanced the mechanical properties, sound absorption, and sound insulation properties of TPU/PIF materials, providing a thought for improving the acoustic properties of serialized polymer foam materials.

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Sound absorption properties of nanofiber membrane-based multi-layer composites

Cited by 10 publications

References 23 publications

Enhanced Low Frequency Sound Absorption of Bilayer Nanocomposite Acoustic Absorber Laminated with Microperforated Nanofiber Felt

Enhanced Low Frequency Sound Absorption of Bilayer Nanocomposite Acoustic Absorber Laminated with Microperforated Nanofiber Felt

Study on the Sound Absorption Properties of Recycled Polyester Nonwovens through Alkaline Treatment and Dimple Processing

Formation of Interpenetrating-Phase Composites Based on the Combined Effects of Open-Cell PIF and Porous TPU Microstructures for Enhanced Mechanical and Acoustical Characteristics

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