Graphene Oxide‐Based Lamella Network for Enhanced Sound Absorption

Abstract

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.

Effect of crossing film among glass fibers on blanket performance

“…The improvement in NAC of different density UGFB/UMPR‐film specimens are authenticated to be construction controlled. Inversely, specimens with different densities with almost unchanged internal constructions cannot have an important influence on the property of noise reduction …”

“…Inversely, specimens with different densities with almost unchanged internal constructions cannot have an important influence on the property of noise reduction. [23] The permeability of these newly developed materials was tested to research the influence of film in the skeleton on the sound wave transmission through the composites. Figure 5C revealed the variation of permeability for UGFB/UMPR-film specimens with different UMPR sheets loadings.…”

“…However, it is still crucial to exploring new structure and developing novel method which is easy to achieve in low‐cost ways. Studies by Nine revealed that film structure have an outstanding advantages in the enhancement of acoustic properties . Nevertheless, research about the tunable, large‐scale, and low‐cost preparation of interconnected polymer film structures inside the ultralight glass fiber blanket (UGFB) has never reported.…”

“…Studies by Nine revealed that film structure have an outstanding advantages in the enhancement of acoustic properties. [23] Nevertheless, research about the tunable, large-scale, and low-cost preparation of interconnected polymer film structures inside the ultralight glass fiber blanket (UGFB) has never reported. In this work, we have developed a novel method to fabricate the internal construction UGFB using interconnected UMPR film.…”

Three‐Dimensional Interconnected Porous Nitrogen‐Doped Carbon Hybrid Foam for Notably Promoted Direct Dehydrogenation of Ethylbenzene to Styrene

“…[26,27] A thermal annealing treatment in nitrogen atmosphere, one can obtain free-standing and in situ nitrogen-doped carbon monolith with large internal void space which can accommodate certain fine substances to introduce functional spices. [28] And the interconnected 3D carbon materials featured with well-arranged macro/micro structure are attractive for various application. [28] And the interconnected 3D carbon materials featured with well-arranged macro/micro structure are attractive for various application.…”