Heat-conducting elastic ultrafine fiber sponges with boron nitride networks for noise reduction

Dingding Zong; Xia Yin; Jianyong Yu; Wenling Jiao; Shichao Zhang; Bin Ding

doi:10.1016/j.jcis.2023.05.209

Heat-conducting elastic ultrafine fiber sponges with boron nitride networks for noise reduction

J Colloid Interface Sci. 2023 Nov:649:1023-1030. doi: 10.1016/j.jcis.2023.05.209. Epub 2023 Jun 8.

Authors

Dingding Zong¹, Xia Yin², Jianyong Yu², Wenling Jiao³, Shichao Zhang⁴, Bin Ding⁵

Affiliations

¹ State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
² Innovation Center for Textile Science and Technology, Donghua University, Shanghai 200051, China.
³ Innovation Center for Textile Science and Technology, Donghua University, Shanghai 200051, China. Electronic address: wenlingjiao@dhu.edu.cn.
⁴ Innovation Center for Textile Science and Technology, Donghua University, Shanghai 200051, China. Electronic address: shichaozhang@dhu.edu.cn.
⁵ State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China; Innovation Center for Textile Science and Technology, Donghua University, Shanghai 200051, China.

PMID: 37393768
DOI: 10.1016/j.jcis.2023.05.209

Abstract

Industrial and traffic noise has become increasingly serious with the progress of industrialization. Most existing noise-absorbing materials suffer from poor heat dissipation and insufficient low-frequency (<1000 Hz) noise absorption, which not only reduces working efficiency but also leads to safety risks. Herein, heat-conducting elastic ultrafine fiber sponges with boron nitride (BN) networks were prepared by integrating direct electrospinning and impregnation method. The large acoustic contact area of ultrafine fibers and the vibration effect of BN nanosheets in a three-dimensional direction endow fiber sponges with good noise reduction, which can reduce white noise by 28.3 dB with a high noise reduction coefficient of 0.64. Moreover, thanks to good heat-conducting networks composed of BN nanosheets and porous structures, the obtained sponges exhibit superior heat dissipation with thermal conductivity of 0.159 W m^-1 K^-1. Besides, the introduction of elastic polyurethane and following crosslinking endow the sponges with good mechanical properties, which have almost no plastic deformation after 1000 compressions, and the tensile strength and strain are as high as 0.28 MPa and 75%. The successful synthesis of heat-conducting elastic ultrafine fiber sponges overcomes poor heat dissipation and low-frequency noise reduction of noise absorbers.

Keywords: Boron nitride networks; Elastic fiber sponges; Heat dissipation; Noise reduction; Ultrafine fibers.