Microstructure and sound absorption property of diatomite/polyurethane porous composites
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摘要: 以硅藻土和聚氨酯为原材料,成功制备出了具有多孔径连通孔道的硅藻土/聚氨酯复合材料.研究了硅藻土、匀泡剂及增塑剂含量对硅藻土/聚氨酯复合材料的组织结构、抗压强度和吸声性能的影响.结果表明,硅藻土/聚氨酯多孔复合材料具有良好的抗压强度和吸声特性.硅藻土含量为65wt%的硅藻土/聚氨酯复合材料表现出优良的吸声特性,其吸声峰位于1 600 Hz附近,且吸声系数大于0.9,吸声系数高于0.56的频率宽度大于2 000 Hz.Abstract: The diatomite/polyurethane composites with multiple aperture communicating channels were successfully prepared with diatomite and polyurethane. The effect of the contents of diatomite, foam stabilizer and plasticizer on the microstructure, compressive strength and sound absorption property of diatomite/polyurethane composites were studied. The results show that the diatomite/polyurethane porous composites have good compressive strength and sound absorption property. The diatomite/polyurethane composite with 65wt% diatomite exhibits excellent sound absorption property, the peak of sound absorption is around 1 600 Hz, and the sound absorption coefficient is greater than 0.9. The frequency width, whose sound absorption coefficient is higher than 0.56, is wider than 2 000 Hz.
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Keywords:
- diatomite /
- polyurethane /
- porous composites /
- compressive strength /
- sound absorption coefficient
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