Sound-absorbing porous materials: a review on polyurethane-based foams

Rastegar, Niloofar; Ershad‐Langroudi, Amir; Parsimehr, Hamidreza; Moradi, Gholamreza

doi:10.1007/s13726-021-01006-8

Cited by 50 publications

(24 citation statements)

References 149 publications

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“…Open-cell foams have many interconnected pores, while the pores of the closed-cell foams are isolated from each other. The type of pores affects the sound absorption properties of the foams; the open-cell foams are more efficient than closed-cell foams in sound absorption [ 66 ]. The sound absorption principle of partially open-cell foams is similar to that of open-cell foams, but their sound absorption capability is inferior.…”

Section: Electrospun Micro/nanofiber-based Porous Sound Absorption Ma...mentioning

confidence: 99%

Research Progress on Sound Absorption of Electrospun Fibrous Composite Materials

Peng

et al. 2022

Nanomaterials

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Noise is considered severe environmental pollutant that affects human health. Using sound absorption materials to reduce noise is a way to decrease the hazards of noise pollution. Micro/nanofibers have advantages in sound absorption due to their properties such as small diameter, large specific surface area, and high porosity. Electrospinning is a technology for producing micro/nanofibers, and this technology has attracted interest in the field of sound absorption. To broaden the applications of electrospun micro/nanofibers in acoustics, the present study of electrospun micro/nano fibrous materials for sound absorption is summarized. First, the factors affecting the micro/nanofibers’ sound absorption properties in the process of electrospinning are presented. Through changing the materials, process parameters, and duration of electrospinning, the properties, morphologies, and thicknesses of electrospun micro/nanofibers can be controlled. Hence, the sound absorption characteristics of electrospun micro/nanofibers will be affected. Second, the studies on porous sound absorbers, combined with electrospun micro/nanofibers, are introduced. Then, the studies of electrospun micro/nanofibers in resonant sound absorption are concluded. Finally, the shortcomings of electrospun micro/nano fibrous sound absorption materials are discussed, and the future research is forecasted.

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Section: Electrospun Micro/nanofiber-based Porous Sound Absorption Ma...mentioning

confidence: 99%

Research Progress on Sound Absorption of Electrospun Fibrous Composite Materials

Peng

et al. 2022

Nanomaterials

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“…Sound‐absorbing materials are indispensable in the process of noise reduction 3 . Generally, these materials use their porous or resonant structures to achieve conversion or absorption of incident sound energy 4 .…”

Section: Introductionmentioning

confidence: 99%

Fabrication, sound absorption simulation and performance optimization of multi‐layer gradient fiber‐based composites

Chen

Zhu

et al. 2023

Polymer Composites

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Noise reduction with materials of finite thickness has been a hot research topic. In this study, multi‐layer gradient fiber‐based composites integrating porous, resonant and damping structures were prepared for efficient sound absorption. Here, the effects of composite structure, fiber‐based thickness and micro‐perforated membrane fabric (MPMF) structure on the sound absorption of the composites were investigated. From the results, the sound absorption band of the composite can be effectively tuned by adjusting the structure of the MPMF or the thickness of the fiber‐based. In addition, the established acoustic model can accurately predict the sound absorption performance of the structure. It is worth mentioning that the gradient structure optimized by the algorithm exhibits broadband sound absorption (noise reduction coefficient of 0.42) and thin feature (thickness of 0.9 cm). Moreover, the medium and low frequency sound waves can be propagated and absorbed more easily by optimizing the structure of the composite. This work provides a reference for the preparation of multi‐layer gradient sound‐absorbing structures and the design of acoustic products in a specific frequency range.

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“…As one of the essential polyurethane, flexible polyurethane foam (FPUF) has been ubiquitously used as vehicle seats, furniture cushion materials, sound insulation materials, and packaging materials because of its low density, good resilience, and porous structure. 1 However, the increasing application of FPUF is gradually in conflict with the increasing needs of human beings for safety and environment. 2,3 On the one hand, FPUF has a high potential fire hazard due to its flammable characteristics and particular use environment.…”

Section: Introductionmentioning

confidence: 99%

Green biobased P‐N coating: Towards waste‐minimization flame retardant flexible polyurethane foam

Piao

Ren

Wang

et al. 2022

Polymers for Advanced Techs

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The increasing consumption of flexible polyurethane foam (FPUF) has caused two significant threats: fire hazards and environmental pollution. More seriously, while waste FPUFs can cause pollution, using many flame retardants also results in significant environmental hazards. Here, the novel process to realize the full lifecycle sustainable utilization of flame retardant FPUF was proposed. First, the biobased P‐N coating (LFPN) was green synthesized by mechanochemistry, and the FPUF was finished by polyelectrolyte‐assisted deposition technology. The fire performance index of FPUF was improved by 110.6% after being treated via LFPN. Moreover, the compression resistance of FPUF was enhanced without affecting the resilience. In order to extend the service life for FPUF, FPUF@LFPN can be reused as a sewage treatment material to remove metal pollution from water. Ultimately, the FPUF@LFPN absorbed metals can be converted into high‐value products such as metal oxide/carbon composites through the metal catalytic pyrolysis technique. This process can effectively reduce the fire and environmental hazards caused by FPUF and may provide an innovative train of thought for the green and sustainable use of other porous polymer materials.

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Sound-absorbing porous materials: a review on polyurethane-based foams

Cited by 50 publications

References 149 publications

Research Progress on Sound Absorption of Electrospun Fibrous Composite Materials

Research Progress on Sound Absorption of Electrospun Fibrous Composite Materials

Fabrication, sound absorption simulation and performance optimization of multi‐layer gradient fiber‐based composites

Green biobased P‐N coating: Towards waste‐minimization flame retardant flexible polyurethane foam

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