Underwater metamaterial absorber with impedance-matched composite

Qu, Sichao; Gao, Nan; Tinel, Alain; Morvan, Bruno; Romero‐García, Vicente; Groby, J.-P.; Sheng, Ping

doi:10.1126/sciadv.abm4206

Cited by 58 publications

(27 citation statements)

References 60 publications

(89 reference statements)

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“…Such excellent underwater sound absorption performance, combined with its facile synthesis, endows the PIL materials with great potential in practical underwater sound absorption applications. 51 To better understand the sound absorption mechanism of PCAVTri-TFSI adhesive film, we systematically characterized its rheological properties, as shown in Figure 4b. For PCAVTri-TFSI film without water incubation (0 h), the storage modulus (G′) and loss modulus (G″) were relatively large and remained constant in the low-frequency region (0.01−3 Hz).…”

Section: Resultsmentioning

confidence: 99%

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Multifunctional Underwater Adhesive Film Enabled by a Single-Component Poly(ionic liquid)

et al. 2023

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Tremendous efforts have been devoted to exploiting synthetic wet adhesives for real-life applications. However, developing low-cost, robust, and multifunctional wet adhesive materials remains a considerable challenge. Herein, a wet adhesive composed of a single-component poly(ionic liquid) (PIL) that enables fast and robust underwater adhesion is reported. The PIL adhesive film possesses excellent stretchability and flexibility, enabling its anchoring on target substrates regardless of deformation and water scouring. Surface force measurements show the PIL can achieve a maximum adhesion of 56.7 mN·m–1 on diverse substrates (both hydrophilic and hydrophobic substrates) in aqueous media, within ∼30 s after being applied. The adhesion mechanisms of the PIL were revealed via the force measurements, and its robust wet adhesive capacity was ascribed to the synergy of different non-covalent interactions, such as of hydrogen bonding, cation−π, electrostatic, and van der Waals interactions. Surprisingly, this PIL adhesive film exhibited impressive underwater sound absorption capacity. The absorption coefficient of a 0.7 mm-thick PIL film to 4–30 kHz sound waves could be as high as 0.80–0.92. This work reports a multifunctional PIL wet adhesive that has promising applications in many areas and provides deep insights into interfacial interaction mechanisms underlying the wet adhesion capability of PILs.

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Section: Resultsmentioning

confidence: 99%

“…It is noteworthy that such excellent underwater sound absorption performance can hardly be achieved by conventional materials (Table S2). Such excellent underwater sound absorption performance, combined with its facile synthesis, endows the PIL materials with great potential in practical underwater sound absorption applications …”

Section: Resultsmentioning

confidence: 99%

Multifunctional Underwater Adhesive Film Enabled by a Single-Component Poly(ionic liquid)

et al. 2023

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“…A recent publication on broadband underwater metamaterial, Qu et al [24]. Present a novel metamaterial absorber with structured impedance-matched composite, which can realized an underwater acoustic absorber exhibiting high absorption from 4 to 20 kHz.…”

Section: According To Different Sound Absorption Mechanisms Sam Can B...mentioning

confidence: 99%

A review of underwater acoustic metamaterials for underwater acoustic equipment

Zhu

Wu³

et al. 2022

Front. Phys.

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Researchers use underwater acoustic equipment to explore the unknown ocean environment, which is one of the important means to understand and utilize the ocean. For underwater acoustic equipment, the application of underwater acoustic metamaterials is the premise to ensure and improve the performance of underwater acoustic communication, acoustic stealth, and sonar detection. Due to the limitations of mass density law and high hydrostatic pressure, traditional underwater acoustic materials cannot effectively absorb low-frequency sound waves and have low efficiency of elastic energy conversion. The sound absorption effect is poor under low frequency and high hydrostatic pressure. In recent years, with the development of acoustic metamaterials technology, all kinds of underwater acoustic metamaterials have also been proposed. Compared with sound waves propagating in the air, underwater sound is more difficult to control than air sound with the same frequency, so the design of underwater acoustic metamaterials is more complicated. This paper reviews the basic characteristics, development history of sound absorption, sound insulation decoupling, and underwater acoustic guided metamaterials, then the existing problems and the future development direction of underwater acoustic metamaterials are discussed.

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“…9,12 In the recent years, various acoustic metamaterials (AM) have been proposed as innovative solutions to noise control. [13][14][15][16][17] Thus far, AM absorbers have been reported to display lowfrequency sound absorption capabilities far surpassing that of the traditional materials. 18,19 Unlike materials with microstructures determined by their fabrication techniques, most AM absorbers are artificially designed based on specified resonance mechanisms, such as Helmholtz resonance, 4,19 non-local, 20 and hybrid resonance.…”

Section: Introductionmentioning

confidence: 99%