With the rapid development of modern industry, the concurrent accumulation of noise and waste heat in confined spaces has become increasingly severe, posing potential risks to both human health and operational safety of equipment. However, most existing sound-absorbing materials exhibit insufficient low-frequency absorption performance and poor thermal conductivity, presenting challenges in achieving noise reduction and heat dissipation simultaneously. Herein, thermally conductive ultrafine fiber sponges (TCFSs) were fabricated using a combined approach of humidity-assisted electrospinning and electrospraying in one step. The resulting material possesses striking compression resilience, showing only slight plastic deformation after 100 cycles. Furthermore, the synergy between the high porosity, large specific surface area, and particle vibration dissipation collectively imparts outstanding broadband noise reduction performance to TCFSs, with a noise reduction coefficient of 0.62. Meanwhile, the interconnected three-dimensional thermal conduction networks, constructed from boron nitride particles and ultrafine fibrous skeleton, endow TCFSs with a thermal conductivity of 0.094 W·m–1·K–1, thereby enabling efficient heat dissipation. The developed ultrafine fiber sponges featuring an enhanced heat transfer property are capable of synergistically achieving noise reduction and heat dissipation, offering an advanced strategy for thermal management and noise control in modern industrial equipment.
Liu et al. (Mon,) studied this question.