Enhancing sound absorption properties of open-cell natural rubber                     foams with treated bagasse and oil palm fibers

Tomyangkul, Supitcha; Pongmuksuwan, Pornlada; Harnnarongchai, Wanlop; Chaochanchaikul, Kantima

doi:10.1177/0731684415627295

Cited by 48 publications

(22 citation statements)

References 19 publications

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“…Organic fillers are mostly plant fibers, such as wood fibers, sawdust, bamboo fibers etc. [13][14][15] Inorganic fillers frequently use hollow glass beads, calcium carbonate, magnesium hydroxide etc. [16][17][18] Traditional PUFs are manufactured from polyethers or polyester polyols, therefore requiring a long time to complete degradation.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and acoustic properties study of castor‐oil‐based polyurethane foams with the addition of graphene‐oxide‐modified straw fibers

Yang

Chen

2022

Polymer International

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Polyurethane foam (PUF) can absorb sound by air friction and structural vibrations of cell walls. It is widely used as acoustic material in the automotive industry. According to existing studies, graphene oxide (GO) can improve the acoustic properties of PUF. However, GO tends to coalesce inside PUF. In this paper, straw fibers were modified with different concentrations of GO solution to embed GO on the surface of plant fibers. The GO was dispersed in the PUF using straw fibers. In addition, some studies show that the wrinkled morphology of the GO surface is believed to play a mechanical interlocking role in improving interfacial bonding, thus enhancing the stress transfer between the plant fibers and the polyurethane (PU) matrix and improving the mechanical properties of the PU composites. The acoustic and mechanical properties of the modified PU materials were observed by treating plant fibers with appropriate amounts of GO solution. The experimental study shows that the sample modified with 1 g L−1 GO solution reaches a maximum average sound absorption coefficient of 0.5838 when the straw fiber content reaches 0.5 g, and the sample modified with 2 g L−1 GO solution reaches a maximum transmission loss of 10.5333 when the straw fiber content reaches 1 g. © 2022 Society of Industrial Chemistry.

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Section: Introductionmentioning

confidence: 99%

Synthesis and acoustic properties study of castor‐oil‐based polyurethane foams with the addition of graphene‐oxide‐modified straw fibers

Yang

Chen

2022

Polymer International

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“…Natural fillers, in addition to their potential to reduce costs, are also environmentally friendly. Examples of natural fillers used in NRLF include ash [5], bran oil [3], rice husk powder [6], eggshell powder [7], kenaf fiber [8][9][10], kenaf bark [11], bagasse fiber [12], and oil palm fibers [13]. In addition to using synthetic and natural substances as fillers in NRLF, it was found in 2018 that crumb rubber (CRM) or rubber powder (RP) could be used as a filler to reduce costs and reinforce NRLF [14].…”

Section: Introductionmentioning

confidence: 99%

Combination Effects of Calcium Carbonate and Crumb Rubber Fillers on the Properties of Natural Rubber Latex Foams

Rattanapan

Artchomphoo

Saijun

et al. 2021

Curr. Appl. Sci. Technol.

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The preparation and mechanical properties of natural rubber latex foam (NRLF) using calcium carbonate (CaCO3) or combinations of CaCO3 and crumb rubber (CRM) as fillers were investigated. The CaCO3 contents were varied as 10, 20, and 30 phr. The ratios of CaCO3/CRM at 0.5/1.0, 0.75/0.75 and 1.0/0.5 were used. The experimental findings were that CaCO3 was well dispersed and blended with the natural rubber latex. The density of the NRLF increased with the increase in CaCO3 content. The foam containing less than 20 phr of CaCO3 showed higher tensile strength and elongation at the break than natural rubber latex foam without CaCO3. The percentage of compression set and depression of NRLF increased with increasing CaCO3 content. When the mixture of CaCO3 and CRM was used as a filler in NRLF, it was found that both CaCO3 and CRM were well dispersed and mixed with natural rubber latex. The NRLF containing the mixture of CaCO3 and CRM was more flexible than the foam containing only CaCO3. Furthermore, the NRLF with CaCO3 and CRM at the ratio of0.75/0.75 showed more uniform bubble shape and higher density than foam with other CaCO3/CRM ratios. The tensile strength of the foam decreased with decreasing CRM content, while the percentage of depression was low when the proportion of the CRM was reduced. Furthermore, the foam containing CaCO3/CRM ratio of 0.75/0.75 showed the lowest compression set.

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“…Lots of modification methods have been adopted to improve various properties of PUFs, such as copolymerization grafting crosslinking, filling, interpenetrating polymer network. [14][15][16][17] The fillers such as bamboo leaves, 18 ice hull, 19 wood fibers, 20 and inorganic fillers 21 can change the structure of the PUF channel and improve the sound absorption performance of PUF.…”

Section: Introductionmentioning

confidence: 99%

Preparation and acoustic properties of a tung oleic acid‐based polyurethane foam and its stratified structure

Chen

2020

Polymers for Advanced Techs

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Bio-based polyurethane foam, a new green environmental material, has attracted more and more attention of people. In this study, the tung oleic acid-based polyurethane (TOPUF) had been prepared using one-step method. Characterization of the polyurethane foams were carried out by SEM and Fourier transform infrared. The cell morphology, acoustic, and mechanical performance of TOPUF with different contents of tung oleic acid-based polyols (TOAP) were studied and compared with that of a pure petroleum-based polyurethane foam. In addition, the effects of thickness ratio of layers on the acoustic performance of the double-layer composite polyurethane foam (DPUF) were also studied by means of theoretical model and experiment. The results illustrate that TOPUF shows a high absorption performance in the frequency range from 100 to 500 Hz and sound insulation performance in the range from 100 to 6300 Hz. The average sound absorption coefficient of TOPUF is 0.505, and the average transmission loss is 18.818 dB in this case. Furthermore, the average sound absorption coefficient and average transmission loss of DPUFs are 0.545 and 14.528 dB using multilayer structure. Overall, TOPUF has excellent acoustic properties and prodigious application prospects.

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Enhancing sound absorption properties of open-cell natural rubber foams with treated bagasse and oil palm fibers

Cited by 48 publications

References 19 publications

Synthesis and acoustic properties study of castor‐oil‐based polyurethane foams with the addition of graphene‐oxide‐modified straw fibers

Synthesis and acoustic properties study of castor‐oil‐based polyurethane foams with the addition of graphene‐oxide‐modified straw fibers

Combination Effects of Calcium Carbonate and Crumb Rubber Fillers on the Properties of Natural Rubber Latex Foams

Preparation and acoustic properties of a tung oleic acid‐based polyurethane foam and its stratified structure

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