Sound Absorption of Hemp Fibers (<i>Cannabis Sativa L</i>.) Based Nonwoven Fabrics and Composites: A Review

Jiangbo, Liao; Zhang, Shangyong; Tang, Xiaoning

doi:10.1080/15440478.2020.1764453

Cited by 62 publications

(25 citation statements)

References 73 publications

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“…It was seen that at the low-frequency level sound absorption coefficient values of hemp and cotton fiber reinforced composite samples were very close to each other, while hemp reinforced composites reached higher sound absorption coefficient values compared to the others when the high-frequency values were reached. It was stated in the literature that the sound absorption coefficient of hemp fiber is high at medium and high frequencies, but it is negligible at low frequencies (Liao et al, 2020). This situation supports the result obtained.…”

Section: Effect Of Fiber Typesupporting

confidence: 89%

151 Evaluation of Acoustic Performance of Hemp and Cotton Fiber Reinforced Thermoplastic Composites

Sezgin¹,

DURU²,

Candan³

2022

Uludağ University Journal of the Faculty of Engineering

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In a developing and increasing world, the increment in the consumption of natural resources brings environmental problems together. The use of plant raw materials has great importance in the construction industry, which has a high consumption rate. Increasing demand to develop sustainable and environmentally friendly materials has increased the use of natural fibers in sustainable building materials (sound absorption, heat and sound insulation). The fact that hemp fiber does not have high water consumption in the production, can be grown without the need for fertilizers and pesticides, as well as leaving a rich soil structure for the next crop by destroying weeds ensures the protection of the soil and the environment. From this point of view, in this study sound insulation properties of hemp fiber reinforced composites were investigated. Polypropylene fiber was used as a matrix material. To compare the performance of hemp fiber, cotton fiber was also utilized and different constructions were produced from these materials. The composites were produced by the hot-press method. It was found that the composites made of hemp fiber showed significantly higher sound insulation than the cotton fiber reinforced composites and can be used as a sound isolation material at specific high frequencies.

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Section: Effect Of Fiber Typesupporting

confidence: 89%

151 Evaluation of Acoustic Performance of Hemp and Cotton Fiber Reinforced Thermoplastic Composites

Sezgin¹,

DURU²,

Candan³

2022

Uludağ University Journal of the Faculty of Engineering

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“…Furthermore, based on the normalized results of many natural fiber samples, an empirical model for the estimation of the SACs of porous samples is presented. It should be noted that, although there are various studies on the SACs of natural fiber samples (Bhingare, Prakash, and Vijaykumar 2019;Gokulkumar et al 2020;Kalauni and Pawar 2019;Liao, Zhang, and Tang 2020;Mamtaz et al 2016;Tang and Yan 2017;Yang et al 2020), limited number of studies have included the STLs of these materials (Bansod, Mittal, and Mohanty 2016;Bhingare and Prakash 2020;Zhu et al 2014). The STLs of some porous natural fiber samples are presented in Section 4.2.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Measurement and Prediction Methods for the Acoustic Properties of Natural Fiber Samples and Evaluation of Their Properties

Körük

2021

Journal of Natural Fibers

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Although some studies have been conducted to show how natural fibers can replace synthetic materials, the use of many natural fibers is still limited. On the other hand, the use of natural fibers can become very common in many applications once their performance is fully understood. This paper aims to present a critical assessment of the acoustic properties of natural fiber samples. First, the methods commonly used for the measurement and prediction of the acoustic properties of natural fiber samples are determined. Second, the common techniques for measuring sound absorption coefficients (SACs) and sound transmission losses (STLs) are presented, and their advantages and limitations are evaluated. After that, the models commonly used for the prediction of acoustic properties are presented. Then, the SACs of many natural fiber samples are presented along with the thickness, bulk density and flow resistivity of the samples. Furthermore, the SACs of the samples are normalized using sample thickness and bulk density, and the sound absorption performance of the fiber samples is evaluated. Based on the results of many natural fiber samples, an empirical model for estimating the SACs of natural fiber samples is presented. Finally, the STLs of some porous natural fiber samples are presented.

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“…[ 88,89] Hemp/epoxy Hand layup After two combing procedures, an alkaline treatment on the hemp fiber can change the morphology, improving the acoustical performance even more.…”

Section: Injection Moldingmentioning

confidence: 99%

Acoustic performance of natural fiber reinforced polymer composites: Influencing factors, future scope, challenges, and applications

et al. 2021

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Noise pollution caused by urbanization and industrial development must be effectively controlled to provide a pleasant living atmosphere. Different synthetic fiber materials have good acoustic performance, yet synthetic fiber materials have a high cost and have adverse effect on the environment. Natural fibers are a good alternative to synthetic fibers in terms of acoustic properties and they are also less expensive and have less environmental impact. Several factors affects the acoustic behavior of natural fiber reinforced polymer composites (NFRPCs). The present article focuses on the effect of different processing methods, reinforcement architecture, fiber diameter, laminate thickness and density on the acoustic performance of NFRPCs. Reinforcement architecture has been proved to be the best option in order to tailor the various acoustic properties of the composite laminates without even changing other physical properties. The challenges, future scope and potential applications of natural fibers in acoustic applications (home theaters, offices, cinema halls, automobiles, etc.) have also been discussed.

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Sound Absorption of Hemp Fibers (Cannabis Sativa L.) Based Nonwoven Fabrics and Composites: A Review

Cited by 62 publications

References 73 publications

151 Evaluation of Acoustic Performance of Hemp and Cotton Fiber Reinforced Thermoplastic Composites

151 Evaluation of Acoustic Performance of Hemp and Cotton Fiber Reinforced Thermoplastic Composites

Assessment of the Measurement and Prediction Methods for the Acoustic Properties of Natural Fiber Samples and Evaluation of Their Properties

Acoustic performance of natural fiber reinforced polymer composites: Influencing factors, future scope, challenges, and applications

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