基于压电效应的发泡聚氨酯复合材料制备及吸声性能研究

Preparation and Sound Absorption Properties of Foamed Polyurethane Composites Based on Piezoelectric Effect

本文利用异构共沉淀法将氧化石墨烯包覆在钛酸钡纳米粒子表面,热处理得到还原氧化石墨烯包覆的钛酸钡纳米粒子(rGO@BT),并将其与聚氨酯发泡材料(PUF)复合制备rGO@BT/PUF复合材料。研究了rGO用量对复合材料吸声性能的影响。结果表明:随着r GO@BT填料的加入能有效提高PUF的吸声性能,尤其是低频吸声性能;当rGO加入量达到1.0 wt%时,复合材料在100-6000 Hz范围内的平均吸声系数达到0.540。

Graphene oxide was coated on the surface of the barium titanate nano-particles by heterogeneous deposition, and the barium titanate nano-particles which coated by the reduced graphene oxide(rGO@BT) were prepared after thermal treatment. Then rGO@BT were mixed with polyurethane foam(PUF) to prepare the rGO@BT/PUF composites. The effect of the amount of grapheme on the sound absorption performance of the composites was studied. The results show that the sound absorption performance of the PUF improved effectively after rGO@BT were added, especially the low frequency sound absorption performance. When the amount of grapheme was 1.0 wt%, the average acoustic absorption coefficient of the composites reached 0.540 in the frequency range of 100-6000 Hz.