Carbonized and Activated Non-wovens as High-Performance Acoustic Materials: Part I Noise Absorption

Chen, Y.; Jiang, Nan

doi:10.1177/0040517507080691

Cited by 62 publications

(41 citation statements)

References 20 publications

(21 reference statements)

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“…Because of this majority of the workers in these industries are disturbed from the noise in their workplaces, and few of them were suffering hearing problems 2 . The study conducted using Non-woven composites with activated carbon fiber (rayon precursor) nonwoven as a surface layer and cotton, ramie, and polypropylene fiber non-wovens as base layers concluded that the activated carbon fiber composites exhibited an exceptional ability to absorb normal incidence sound waves 3 .Acoustic characteristics of structured needle punched floor coverings in relation to fiber fineness, surface effect, punch density, areal density, and chemical bonding process has been studied. It has been found that higher levels of punch density and higher areal density caused the noise reduction coefficient (NRC) of the fabrics 4 .…”

Section: Literature Reviewmentioning

confidence: 99%

Development of Highloft Nonwoven Materials for Health Care Acoustics

Bharanitharan¹,

K.Thangamani²,

Sundaresan³

2017

Int. Res. J. Pharm.

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Noise pollution can impart hearing impairment, hypertension, ischemic heart disease, annoyance, and sleep disturbance in huma n being. Continuous hearing of sound of 90 decibels make fatigue in hearing organs. Equipment sound more than 90 decibels will lead to damage of eardrums. Prolonged sound pollution will lead to permanent hearing disability. It will also create various types of temporary physiological changes, such as hypertension, change of the rate of heart-beat, high respiratory rates, excessive perspiration and vomitary tendency in human beings. This research work has been carried out to investigate the potential of natural material for acoustic applications. The most important factor for noise reduction is mainly based on the type of raw material used and also the structure of the material. In this examination to determine the acoustic performance, jute fibre was processed with STRUTO technology. The highloft structures produced by mixing jute fibre with polyester fibre and low melt bicomponent fibre has been thoroughly studied. The results from various GSM levels also have been analyzed. The highloft materials, which is light weight showed high efficient sound absorbing ability especially with increased GSM. Sound absorption properties of samples were analyzed and the findings were tabulated. These results indicated that high loft textiles produced from jute fibre blends, can be used as a primary raw material for acoustic applications, which is low in cost, light weight and also biodegradable.

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Section: Literature Reviewmentioning

confidence: 99%

Development of Highloft Nonwoven Materials for Health Care Acoustics

Bharanitharan¹,

K.Thangamani²,

Sundaresan³

2017

Int. Res. J. Pharm.

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“…Using activated carbon fibers on the surface of composites, Chen and Jiang [24] obtained a structure with two porous layers, a large diameter porous layer confined between the fiber and the yarn and a small diameter porous layer produced at the surface of the activated carbon fibers. Activated carbon fibers used in a nonwoven composite resulted in an increase in total volume of porous space improving sound absorption performance of the material at frequencies between 0.05-1.6 kHz.…”

Section: Resultsmentioning

confidence: 99%

“…Kenaf, jute and cotton fibers mixed with polyester and polypropylene in combination with an automotive padding material resulted in significant improvement in sound absorption properties [23]. Rayon activated small pore sized carbon layers combined with a nonwoven layer of cotton, polypropylene and rami fiber mixture, revealed better sound absorption rates [24]. Banana, bamboo and jute fibers mixed with polypropylene, yielded improved sound absorption properties [25].…”

Section: Introductionmentioning

confidence: 99%

Sound absorption properties of bilayered nonwoven composites

Küçük

Korkmaz

2015

Fibers Polym

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Growing interest in sound absorbing materials in industrial applications is their maximized low frequency properties. This research focused on improvement of sound absorption characteristics of layered nonwoven composites. Two different nonwoven structures as polyester and polyester/polyamide blend, were selected as top layer of the bilayered structure. Combinations of a control top layer and a variety of base layers were tested for their sound absorption properties and the effect of using; 1) polyester or 2) polyester/polyamide top layer was investigated. Development of composites with microfibrous layer of 70 %Polyester/30 %Polyamide fibers backed with either of 70 %wool/30 %bi-component polyester, 70 %Cotton/30 %Polyester or 70 % equivalent blend of acrylic, cotton, polyester and 30 % polypropylene nonwoven fibers, provided exceptional sound absorption properties at low frequencies. Macrofibrous layer of polyester fibers backed with 70 %wool/30 %bi-component polyester fibers improved sound absorption properties at all frequency ranges.

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“…The ACF composites exhibit an exceptional ability to absorb normal incidence sound waves in comparison to composites with either glass-fiber or cotton fiber or ramie fiber, as illustrated in Fig. 4 (Chen and Jiang 2007). Considering the light weight, biodegradability, and low cost of the raw material, activated carbon products have potential to be used as high-performance and cost-effective acoustical materials.…”

Section: Composites With Other Additives And/or Polymer Matrix Systemsmentioning

confidence: 99%

Recent Advances in the Sound Insulation Properties of Bio-based Materials

Zhu¹,

Kim²,

Wang³

et al. 2013

BioResources

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Many bio-based materials, which have lower environmental impact than traditional synthetic materials, show good sound absorbing and sound insulation performances. This review highlights progress in sound transmission properties of bio-based materials and provides a comprehensive account of various multiporous bio-based materials and multilayered structures used in sound absorption and insulation products. Furthermore, principal models of sound transmission are discussed in order to aid in an understanding of sound transmission properties of bio-based materials. In addition, the review presents discussions on the composite structure optimization and future research in using co-extruded wood plastic composite for sound insulation control. This review contributes to the body of knowledge on the sound transmission properties of bio-based materials, provides a better understanding of the models of some multiporous bio-based materials and multilayered structures, and contributes to the wider adoption of bio-based materials as sound absorbers.

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Carbonized and Activated Non-wovens as High-Performance Acoustic Materials: Part I Noise Absorption

Cited by 62 publications

References 20 publications

Development of Highloft Nonwoven Materials for Health Care Acoustics

Development of Highloft Nonwoven Materials for Health Care Acoustics

Sound absorption properties of bilayered nonwoven composites

Recent Advances in the Sound Insulation Properties of Bio-based Materials

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