摘要
为降低噪声污染对环境的影响,本实验通过热压发泡法制备了吸声性能良好的发泡聚氨酯材料。研究了发泡剂用量对发泡聚氨酯的泡孔结构、吸声性能和阻尼性能的影响。结果表明:发泡聚氨酯材料内部随发泡剂添加量的增加逐渐产生闭孔、开孔等孔隙结构,丰富的孔隙结构具有较好的吸声效果。其中发泡剂质量分数为18%的发泡聚氨酯材料吸声效果较好,平均吸声系数为0.447。但发泡聚氨酯材料中泡孔结构使其内部结构变得疏松,导致其阻尼性能下降。
To reduce the environmental impact of noise pollution,the foamed polyurethane materials with good sound absorption property were prepared by hot pressing foaming method.The effects of the content of the foaming agent on the pore structures,sound absorption property and damping property of the foamed polyurethane materials were studied.The results show that the pore structures of closed cells and opening pores gradually form in the foamed polyurethane materials with increasing the amount of foaming agent,and a variety of pore structures have good sound absorption performances.The foamed polyurethane material with a foaming agent mass fraction of 18%has better sound absorption ability,and the average sound absorption coefficient is 0.447.However,the inside structure of the foamed polyurethane materials becomes loose due to its pore structure,leading to the decrease of the damping property.
作者
陈明轩
江学良
李菁瑞
李栋辉
马鹏飞
游峰
姚楚
CHEN Mingxuan;JIANG Xueliang;LI Jingrui;LI Donghui;MA Pengfei;YOU Feng;YAO Chu(School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan 430205,China)
出处
《武汉工程大学学报》
CAS
2019年第6期541-545,共5页
Journal of Wuhan Institute of Technology
基金
湖北省自然科学基金（2017CFB289）
武汉工程大学第十届研究生教育创新基金（CX2018048)
关键词
聚氨酯
泡沫
阻尼性能
吸声性能
polyurethane
foam
damping properties
sound absorption properties
