In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 11, No. 25 ( 2023), p. 13378-13388
Abstract:
The generation of full-frequency noise from variable-speed motors and engines constitutes a significant threat to human health and contributes to global energy loss. To address this pressing issue, a bilayer nanofibrous membrane was designed and fabricated with improved acoustoelectric conversion properties and full-frequency noise absorption capabilities. The hydroxyl (–OH) in cellulose nanocrystals (CNC) and the cyano (–CN) in polyacrylonitrile (PAN) interacted to dramatically increase the proportion of PAN's zigzag conformation to 89.9% via the combined effect of an electrostatic field and molecular induction, resulting in improved acoustoelectric conversion efficiency. The nanofiber device demonstrates exceptional performance, reducing low-frequency noise from 110 dB to 96 dB and generating peak electrical outputs of 10.92 V and 12.9 μA. Furthermore, heterogeneous and juxtaposed nanofibers of polystyrene (PS) and polyamide 66 (PA66) were electrospun parallelly to address the challenge of reducing medium and high-frequency noise, leveraging their vastly different elastic modulus properties. The stacked structure of the two layers further amplifies the synergistic effect on the noise absorption medium and high-frequency noise n and acoustoelectric conversion, leading to enhanced full-frequency noise suppression, thereby reducing sound pressure to 68 dB with a sound absorption efficiency of 0.7. This novel fibrous film presents a highly promising approach for mitigating the effects of full-frequency noise pollution, serving as a potential energy source.
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2702232-8
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