The invention discloses a preparation method of a sound-absorbing cotton composite material with sound insulation, sound absorption and noise reduction functions. The preparation method comprises the following steps: preparing silicon dioxide sol and unwinding sound-absorbing cotton; spraying atomized silicon dioxide sol on the white surface of at least one side of the unwound sound-absorbing cotton; after spraying is completed, the sound-absorbing cotton is heated and cured through microwaves, and the silicon dioxide sol drops on the shallow surface layer of the sound-absorbing cotton to form a wet gel felt; the sound-absorbing cotton prepared in the step c is aged and then subjected to carbon dioxide supercritical drying, and an aerogel shell is formed on the surface of the sound-absorbing cotton, so that the sound-absorbing cotton composite material is obtained. According to the sound-absorbing cotton composite material with the sound-insulating, sound-absorbing and noise-reducing functions and the preparation method of the sound-absorbing cotton composite material, the sound-absorbing material is formed on the surface of the sound-absorbing cotton, so that the sound-absorbing cotton has strong sound-insulating performance, the energy of external noise entering the sound-absorbing cotton is relatively low, the noise in a certain space is controllable, and the sound-absorbing and noise-reducing functions are realized. And a good absorption effect is achieved on low and medium frequency noise.
本发明公开了一种具有隔声和吸声降噪功能的吸音棉复合材料的制备方法,通过调制二氧化硅溶胶并放卷吸音棉;在放卷好的吸音棉的至少一侧白面喷涂雾化的二氧化硅溶胶;喷涂完成后,将吸音棉通过微波加热固化,二氧化硅溶胶滴液在吸音棉的浅表面层形成湿凝胶毡;再将步骤c制得的吸音棉经陈化老练后通过二氧化碳超临界干燥后在吸音棉表面形成气凝胶外壳,从而获得吸音棉复合材料。通过上述方式,本发明具有隔声和吸声降噪功能的吸音棉复合材料及其制备方法,在吸音棉的表面形成吸音材料,使得吸音棉具有强隔声的性能,外部噪声进入吸音棉内部的噪声能量较低,表现出一定空间内部的噪音可控,对于中低频噪音有很好的吸收效果。
Sound-absorbing cotton composite material with sound insulation, sound absorption and noise reduction functions and preparation method of sound-absorbing cotton composite material
具有隔声和吸声降噪功能的吸音棉复合材料及其制备方法
2023-08-18
Patent
Elektronische Ressource
Chinesisch
IPC: | D06M Behandeln von Fasern, Fäden, Garnen, Textilgut, Federn oder aus solchen Materialien hergestelltem Fasergut, soweit nicht anderweitig in Klasse D06 vorgesehen , TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |
Europäisches Patentamt | 2018
|Europäisches Patentamt | 2024
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