摘要
采用聚氨酯疏水层与聚氨酯/中空玻璃微球(HGM)复合材料吸声层,制备多层吸声复合材料。试样PU/HGM-1的表层为疏水层,加2层吸声层,总厚度为14 mm;对比试样PU/HGM-3为3层吸声层构成,总厚度为18 mm。测试了材料的隔声性能、吸声系数、静态水接触角,并用原子力显微镜表征表面微观结构。结果表明:尽管试样PU/HGM-1的总厚度比PU/HGM-2薄4 mm,但隔声效果更好,在2000 Hz频率下,隔声量达到33 dB;2000~5000 Hz频率下隔声量在20 dB以上;一定频率范围内,复合材料呈现出较为均匀的吸声特性。PU/HGM-1材料的静态水接触角为105°。扫描电镜测试表明,材料表面具有连续的微纳结构。两个试样的吸声系数变化趋势一样,在1700~3400 Hz范围内,试样PU/HGM-1的吸声系数更高,吸声效果较好。
The multi-layer sound absorbing composite was prepared by a polyurethane hydrophobic layer combined with the sound absorbing layer which composed of polyurethane and hollow glass microsphere(HGM).The surface layer of the sample PU/HGM-1 was hydrophobic layer,plus 2 sound absorbing layers,the total thickness of the sample was 14 mm.The comparison sample PU/HGM-2 consists of 3 sound absorbing layers,and the total thickness of the sample was 18 mm.The sound insulation properties,sound absorption coefficient and static water contact angle of the material were tested,and the microstructure was characterized by atomic force microscopy.The results showed that,although the total thickness of the sample PU/HGM-1 was 4 mm thinner than PU/HGM-1,the sound insulation effect was better.The sound insulation quantity reached 33 dB at the frequency of 2000 Hz,and the sound insulation quantity was above 20 dB at the frequency of 2000~5000 Hz.In a certain frequency range,the composite material presented relatively uniform sound absorption characteristics.The static water contact angle of PU/HGM-1 was 105°,and scanning electron microscopy(AFM)test showed that the surface of the material had a continuous micro-nano structure.The variation trend of the sound absorption coefficient of the two samples was the same.In the range of 1700 Hz to 3400 Hz,the sound absorption coefficient of the samples PU/HGM-1 was higher,and the sound absorption effect was better.
作者
刘晓东
王阳
李天智
陈明月
崔向红
孙鹏
LIU Xiaodong;WANG Yang;LI Tianzhi;CHEN Mingyue;CUI Xianghong;SUN Peng(Institute of High Technology,Heilongjiang Academy of Sciences,Harbin 150009,China;College of Materials Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China)
出处
《聚氨酯工业》
CAS
2024年第6期18-21,共4页
Polyurethane Industry
基金
国家重点研发计划项目(2023YFE0200500)。
关键词
聚氨酯
HGM
疏水
多层复合
隔声
polyurethane
HGM
hydrophobic
multilayer composite
sound insulation