Lightweight Low‐Frequency Sound‐Absorbing Composites of Graphene Network Reinforced by Honeycomb Structure

Xu, Fan; Zhang, Siying; Wang, Gui‐Gen; Zhao, Daqiang; Feng, Junwei; Wang, Baolin; He, Xiaodong

doi:10.1002/admi.202100183

Cited by 19 publications

(5 citation statements)

References 44 publications

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“…2022, 34, 2103740 same thickness (Figure S18A, Supporting Information). Moreover, the specific NRC and greater efficiency of PFGA surpassed most of the reported sound-absorption materials, such as the conventional porous materials, [29,30,[36][37][38][39][40][41][42] composites [21,22,25,[43][44][45][46][47] and ultralight aerogels [35,[48][49][50] (Figure 4E and Figure S18B, Supporting Information), in which air friction mechanism dominates. The superiority of PFGA in sound absorption is ascribed to the strong resonance of ultrathin graphene drums, fulfilling the overwhelming merit of graphene sheets.…”

Section: Resultsmentioning

confidence: 99%

Highly Efficient Cellular Acoustic Absorber of Graphene Ultrathin Drums

et al. 2022

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Atomically thin 2D graphene sheets exhibit unparalleled in‐plane stiffness and large out‐of‐plane elasticity, thereby providing strong mechanical resonance for nanomechanical devices. The exceptional resonance behavior of ultrathin graphene, which promises the fabrication of superior acoustic absorption materials, however, remains unfulfilled for the lack of applicable form and assembly methods. Here, a highly efficient acoustic absorber is presented, wherein cellular networks of ultrathin graphene membranes are constructed into polymer foams. The ultrathin graphene drums exhibit strong resonances and efficiently dissipate sound waves in a broad frequency range. A record specific noise reduction coefficient (51.3 at 30 mm) is achieved in the graphene‐based acoustic absorber, fully realizing the superior resonance properties of graphene sheets. The scalable method facilely transforms commercial polymer foams to superior acoustic absorbers with a ≈320% enhancement in average absorption coefficient across wide frequencies from 200 to 6000 Hz. The graphene acoustic absorber offers a convenient method to exploit the extraordinary resonance properties of 2D sheets, opening extensive new applications in noise protection, building design, instruments and acoustic devices.

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Section: Resultsmentioning

confidence: 99%

Highly Efficient Cellular Acoustic Absorber of Graphene Ultrathin Drums

et al. 2022

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“…[ 219 , 220 , 221 ] Excitingly, the honeycomb architecture has excellent properties such as lightweight, high strength, sound, and thermal insulation. [ 222 , 223 , 224 , 225 ] These properties have attracted widespread interest from structural and materials scientists and have led to a wide range of applications for the honeycomb architecture. Furthermore, honeycomb architectures have also been found in the wood of bamboo and spruce, which demonstrates that nature is an excellent structural scientist.…”

Section: Honeycomb Architecturementioning

confidence: 99%

Advanced Composites Inspired by Biological Structures and Functions in Nature: Architecture Design, Strengthening Mechanisms, and Mechanical‐Functional Responses

Dai

et al. 2023

Advanced Science

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The natural design and coupling of biological structures are the root of realizing the high strength, toughness, and unique functional properties of biomaterials. Advanced architecture design is applied to many materials, including metal materials, inorganic nonmetallic materials, polymer materials, and so on. To improve the performance of advanced materials, the designed architecture can be enhanced by bionics of biological structure, optimization of structural parameters, and coupling of multiple types of structures. Herein, the progress of structural materials is reviewed, the strengthening mechanisms of different types of structures are highlighted, and the impact of architecture design on the performance of advanced materials is discussed. Architecture design can improve the properties of materials at the micro level, such as mechanical, electrical, and thermal conductivity. The synergistic effect of structure makes traditional materials move toward advanced functional materials, thus enriching the macroproperties of materials. Finally, the challenges and opportunities of structural innovation of advanced materials in improving material properties are discussed.

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“…In contrast, foam-based sound absorption materials have the advantages of being lightweight and having great structural stability [19][20][21]. Currently, foam-based sound absorption materials mainly include metal foams, inorganic foams, polymer foams and their composite foams [22][23][24][25], which dissipate the sound wave energy through resonance and multiple re ections within the materials to achieve the noise mitigation effect.…”

Section: Introductionmentioning

confidence: 99%

Sound absorption polyimide composite aerogels for ancient architectures’ protection

Zhao

Duan

et al. 2023

Adv Compos Hybrid Mater

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Ancient architectures are an important part of immovable cultural heritage and the largest surviving amount of tangible cultural heritage in the world. However, the increasingly serious noise pollution will not only affect the sanctity of ancient architectures, but damage the internal structure caused by continuous mechanical vibration, and affect their lifetime. In this paper, diaminodiphenyl ether and pyromellitic dianhydride were used as monomers, modi ed by triethylamine to synthesize water-soluble polyamide acids, and calcium carbonate (CaCO 3 ) was used as ller to prepare CaCO 3 /polyimide (CaCO 3 /PI) composite aerogels by homogeneous mixing, freeze-drying and thermal imidization. CaCO 3 can effectively adjust the pore wall roughness of CaCO 3 /PI composite aerogels, so as to improve their sound absorption performance. When the amount of CaCO 3 is 4 wt%, CaCO 3 /PI composite aerogels exhibit optimal sound absorption performance, excellent mechanical properties, thermal insulation and heat resistance. The corresponding noise reduction coe cient is 0.327 and the average sound absorption coe cient is 0.903 in the frequency range of 2000 ~ 6300 Hz. Young's modulus is 4.03 kPa, stress loss and plastic deformation after 100 compression cycles with a maximum strain of 50% are 3.27% and 2.17%, respectively. The energy loss coe cient is 0.248, thermal conductivity is 0.038 W/(m•K), and heat resistance index is 334.1 o C. The CaCO 3 /PI composite aerogels show momentous application prospects in the eld of ancient architectures protection.

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Lightweight Low‐Frequency Sound‐Absorbing Composites of Graphene Network Reinforced by Honeycomb Structure

Cited by 19 publications

References 44 publications

Highly Efficient Cellular Acoustic Absorber of Graphene Ultrathin Drums

Highly Efficient Cellular Acoustic Absorber of Graphene Ultrathin Drums

Advanced Composites Inspired by Biological Structures and Functions in Nature: Architecture Design, Strengthening Mechanisms, and Mechanical‐Functional Responses

Sound absorption polyimide composite aerogels for ancient architectures’ protection

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