基于氧化石墨烯的薄片网络可增强声音吸收,Advanced Functional Materials

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基于氧化石墨烯的薄片网络可增强声音吸收
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2017-10-23 , DOI: 10.1002/adfm.201703820
Md Julker Nine _{1,

2} , Md Ayub ₃ , Anthony C. Zander ₃ , Diana N. H. Tran _{1,

2} , Benjamin S. Cazzolato ₃ , Dusan Losic _{1,

2}

Affiliation

噪声是一种环境污染物，对人类的心理和生理健康具有公认的影响。许多多孔材料通常受到宽频率范围内的低吸声，美味，重量和厚度过大，透湿性差，高温不稳定性以及缺乏大量商业化准备的限制。在此，据报道，一种高效，坚固的薄片结构是一种吸声材料，它是基于由格栅状三聚氰胺骨架支撑的自组装互连氧化石墨烯（GO）片材制成的。与三聚氰胺泡沫相比，在128到4000 Hz之间的宽吸收带上（在较低的频率下约为100％），所制造的薄片结构在≈60.30％的范围内表现出≈60.3％的增强。增强的吸声被认为与结构无关，而与密度无关。开孔结构中的声耗是由于粘性和热损耗引起的，而它主要是波传播中的曲折性以及GO基薄板的增加的表面积。除了增强的吸声性和机械强度外，薄板还提供了优于许多传统吸声器的出色结构功能，包括吸湿/防雾和阻燃性。这种新型吸声器的制造成本低廉，可扩展，并且可以适用于商业，住宅和工业建筑结构中的广泛应用。除了增强的吸声性和机械强度外，薄板还提供了优于许多传统吸声器的出色结构功能，包括吸湿/防雾和阻燃性。这种新型吸声器的制造成本低廉，可扩展，并且可以适用于商业，住宅和工业建筑结构中的广泛应用。除了增强的吸声性和机械强度外，薄板还提供了优于许多传统吸声器的出色结构功能，包括吸湿/防雾和阻燃性。这种新型吸声器的制造成本低廉，可扩展，并且可以适用于商业，住宅和工业建筑结构中的广泛应用。

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Graphene Oxide‐Based Lamella Network for Enhanced Sound Absorption

Noise is an environmental pollutant with recognized impacts on the psychological and physiological health of humans. Many porous materials are often limited by low sound absorption over a broad frequency range, delicacy, excessive weight and thickness, poor moisture insulation, high temperature instability, and lack of readiness for high volume commercialization. Herein, an efficient and robust lamella‐structure is reported as an acoustic absorber based on self‐assembled interconnected graphene oxide (GO) sheets supported by a grill‐shaped melamine skeleton. The fabricated lamella structure exhibits ≈60.3% enhancement over a broad absorption band between 128 and 4000 Hz (≈100% at lower frequencies) compared to the melamine foam. The enhanced acoustic absorption is identified to be structure dependent regardless of the density. The sound dissipation in the open‐celled structure is due to the viscous and thermal losses, whereas it is predominantly tortuosity in wave propagation and enhanced surface area for the GO‐based lamella. In addition to the enhanced acoustic absorption and mechanical robustness, the lamella provides superior structural functionality over many conventional sound absorbers including, moisture/mist insulation and fire retardancy. The fabrication of this new sound absorber is inexpensive, scalable and can be adapted for extensive applications in commercial, residential, and industrial building structures.

更新日期：2017-10-23

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