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Improvement of natural fiber's properties and evaluation of its applicability as eco-friendly materials in noise pollution control



The use of green and eco-natural fibers due to availability, biodegradability, reasonable cost, and non-toxic effects are known as potential acoustic materials in research. Nevertheless, in this area, the use of chemical treatment in natural fibers as an effective strategy to improve the overall properties and acoustic performance is faced with limitations. So that the current paper aims to investigate the effect of alkali treatment on the mechanical and acoustical properties of jute fibers and evaluation of its applicability in noise pollution control.


To determine the effect of alkali treatment on the sound absorption behavior of jute fibers, a sufficient amount of both types of fibers (raw and treated) were used to the fabrication of acoustic samples with thicknesses of 30, 40 and 50 mm at a density of 200 kg/m3. The acoustic evaluation was measured by the Impedance tube system according to transfer function method using by the standard ISO 10534–2. The morphological and tensile properties of fibers were evaluated by the Scanning Electron Microscopy (SEM) and tensile test (ASTM C1557-14 standard). Moreover, Infrared Spectroscopy (FTIR) and X-ray diffraction (XRD) were used to study and compare the chemical properties of raw and treated fibers.


The result showed that the mean tensile strength and crystallinity index (CI) of treated fibers comparing with raw fibers increased by 61.66% and 3.26% respectively. The use of Alkali treatment helped to improve sound absorption performance of jute fibers with different thicknesses. Furthermore, noise reduction rate (NRC) in treated acoustic samples compared to untreated with a thickness of 50 mm increased from 0.66 to 0.69.


Finally, the alkali treatment has enhanced the properties of jute fibers and confirmed the applicability of these fibers in acoustic absorption.

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The authors would like to express their gratitude to Mazandaran University of Medical Sciences for providing the necessary laboratory facilities for conducting this research. This work was supported by Mazandaran University of Medical Science, Sari, Iran [Grant No: 11893].

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Correspondence to Ebrahim Taban or Seyed Ehsan Samaei.

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Valipour, F., Taban, E., Samaei, S.E. et al. Improvement of natural fiber's properties and evaluation of its applicability as eco-friendly materials in noise pollution control. J Environ Health Sci Engineer (2022).

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  • Jute natural fibers
  • Alkali treatment
  • Impedance tube
  • Acoustic absorption
  • Surface modification