Polyurethane composite foams including silicone-acrylic particles for enhanced sound absorption via increased damping and frictions of sound waves

Baek, Seung Hwan; Kim, Jung Hyeun

doi:10.1016/j.compscitech.2020.108325

Cited by 54 publications

(31 citation statements)

References 29 publications

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“…When the filler content increased, this study became similar to the previous work (Baek, Seung Hwan [ 25 ]) in sound absorption property. The sound absorption frequency increases in medium high frequency with further increments of filler content.…”

Section: Resultssupporting

confidence: 89%

“…The SEM images clearly demonstrate that the cell size distinctively appears consistent with the increasingly greater HCM content. Hence, it is substantiated that the presence of HCM is correlated with the cell structure and morphology, stabilizing the cell morphology [ 25 , 26 ]. In addition, sound absorptivity of composites is dependent on the difference in the cell structure.…”

Section: Resultsmentioning

confidence: 99%

“…HCM is inorganic ceramic that absorbs and disperses much of a compression force. When FPUF is incorporated with HCM, the latter of plays a role of hard chain segments when being embedded in the cell walls of PU foam during the foaming and curing process [ 16 , 17 , 25 ]. A high HCM content means a greater amount of HCM.…”

Section: Resultsmentioning

confidence: 99%

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Functional Hollow Ceramic Microsphere/Flexible Polyurethane Foam Composites with a Cell Structure: Mechanical Property and Sound Absorptivity

et al. 2022

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Noise pollution is the primary environmental issue that is increasingly deteriorated with the progress of modern industry and transportation; hence, the purpose of this study is to create flexible PU foam with mechanical properties and sound absorption. In this study, hollow ceramic microsphere (HCM) is used as the filler of polyurethane (PU) foam for mechanical reinforcement. The sound absorption efficacy of PU pores and the hollow attribute of HCM contribute to a synergistic sound absorption effect. HCM-filled PU foam is evaluated in terms of surface characteristic, mechanical properties, and sound absorption as related to the HCM content, determining the optimal functional flexible PU foam. The test results indicate that the presence of HCM strengthens the stability of the cell structure significantly. In addition, the synergistic effect can be proven by a 2.24 times greater mechanical strength and better sound absorption. Specifically, with more HCM, the flexible PU foam exhibits significantly improved sound absorption in high frequencies, suggesting that this study successfully generates functional PU foam with high mechanical properties and high sound absorption.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 99%

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Functional Hollow Ceramic Microsphere/Flexible Polyurethane Foam Composites with a Cell Structure: Mechanical Property and Sound Absorptivity

et al. 2022

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“…In the frequency range of 500-1000 Hz, the sound absorption properties of PU foam samples containing only 0.05 wt% nanoparticles increased greatly (over 90%), but the sound-absorbing performance in the low-frequency range was not much improved. Baek and Kim [10] manufactured PU composite foam containing silicone-acrylic filler particles to test the sound absorption performance. When the content of nanoparticles was 2 wt%, the maximum value of sound absorption coefficient was increased by 0.12 compared with the PU foam without addition.…”

Section: Introductionmentioning

confidence: 99%

Improved Sound Absorption Properties in Polyurethane Foams by the Inclusion of Al₂O₃ Nanoparticles

Yuan

Fang

Liu

et al. 2021

Shock and Vibration

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At present, the scale of China’s power grid is becoming larger and larger, and the control of low-frequency noise in substations (especially for transformers) is very important. The sound-absorbing materials have become one of the important ways to control low-frequency noise. The single polyurethane material cannot satisfy the requirements for reducing low-frequency noise, so it is very necessary to study its composite with other materials. In the paper, the flexible polyurethane foam and Al2O3 nanoparticle composites were obtained by the impregnation method. The method was simple, safe, and easy to control. The morphology and sound absorption coefficient of the foam materials before and after filling were analyzed. Single-hole acoustic cavity models of PU and Al2O3-PU composite were established through the finite element. The absorption and dissipation process of sound pressure for single hole was studied to understand the energy dissipation process. Meanwhile, through studying acoustic energy storage and acoustic energy dissipation, the loss factor of a single hole was obtained, which can predict the change rule of the sound absorption coefficient for PU foam and Al2O3-PU.

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“…The introduction of the fillers can modify PUR during the production process. Numerous studies focused on the filler addition effect on the physical properties of PUR foams, such as density, thermal and mechanical properties, polyurethane cell structure and flame retardancy [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ]. Kuźnia et al [ 18 ] modified PUR foam with fluidized bed combustion fly ash, a waste material rarely used in the industry.…”

Section: Introductionmentioning

confidence: 99%

Fly Ash as an Eco-Friendly Filler for Rigid Polyurethane Foams Modification

et al. 2021

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There is currently a growing demand for more effective thermal insulation materials with the best performance properties. This research paper presents the investigation results on the influence of two types of filler on the structure and properties of rigid polyurethane foam composites. Fly ash as a product of coal combustion in power plants and microspheres of 5, 10, 15, and 20 wt.%, were used as rigid polyurethane foams modifiers. The results of thermal analysis, mechanical properties testing, and cellular structure investigation performed for polyurethane composites show that the addition of fly ash, up to 10 wt.%, significantly improved the majority of the tested parameters. The use of up to 20 wt.% of microspheres improves the mechanical and thermal properties and thermal stability of rigid polyurethane foams.

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Polyurethane composite foams including silicone-acrylic particles for enhanced sound absorption via increased damping and frictions of sound waves

Cited by 54 publications

References 29 publications

Functional Hollow Ceramic Microsphere/Flexible Polyurethane Foam Composites with a Cell Structure: Mechanical Property and Sound Absorptivity

Functional Hollow Ceramic Microsphere/Flexible Polyurethane Foam Composites with a Cell Structure: Mechanical Property and Sound Absorptivity

Improved Sound Absorption Properties in Polyurethane Foams by the Inclusion of Al₂O₃ Nanoparticles

Fly Ash as an Eco-Friendly Filler for Rigid Polyurethane Foams Modification

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Polyurethane composite foams including silicone-acrylic particles for enhanced sound absorption via increased damping and frictions of sound waves

Cited by 54 publications

References 29 publications

Functional Hollow Ceramic Microsphere/Flexible Polyurethane Foam Composites with a Cell Structure: Mechanical Property and Sound Absorptivity

Functional Hollow Ceramic Microsphere/Flexible Polyurethane Foam Composites with a Cell Structure: Mechanical Property and Sound Absorptivity

Improved Sound Absorption Properties in Polyurethane Foams by the Inclusion of Al2O3 Nanoparticles

Fly Ash as an Eco-Friendly Filler for Rigid Polyurethane Foams Modification

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Product

Resources

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Improved Sound Absorption Properties in Polyurethane Foams by the Inclusion of Al₂O₃ Nanoparticles