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Sound velocity gradient flexible gel material with broadband adjustable parameters and preparation method of sound velocity gradient flexible gel material

A gel material and parameter technology, applied in the direction of coating, etc., can solve the problems that the artificial devices with rigid characteristics are difficult to achieve broadband adjustment, limit the transmission efficiency of acoustic wave energy, and the performance of artificial devices is limited, so as to achieve good swelling resistance and acoustic performance Maintain stable, easy-to-operate effects

Active Publication Date: 2022-07-08
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance of artificial devices designed using the above method is limited, mainly due to the following reasons: 1. The multiple scattering effects of scatterers will cause the artificial devices to have poor sound permeability and large internal energy loss; 2. Rigidity The characteristics make it difficult for artificial devices to achieve the purpose of wideband adjustment; 3. Acoustic impedance mismatch limits the transmission efficiency of acoustic energy

Method used

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  • Sound velocity gradient flexible gel material with broadband adjustable parameters and preparation method of sound velocity gradient flexible gel material
  • Sound velocity gradient flexible gel material with broadband adjustable parameters and preparation method of sound velocity gradient flexible gel material
  • Sound velocity gradient flexible gel material with broadband adjustable parameters and preparation method of sound velocity gradient flexible gel material

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preparation example Construction

[0032] The embodiment of the present invention provides a preparation method of a sound velocity gradient flexible gel material with broadband adjustable parameters, comprising the following steps:

[0033] S1, adding glycerin to the polymer compound monomer solution, stirring uniformly, then adding an initiator and a crosslinking agent, stirring uniformly, and obtaining a precursor solution after defoaming.

[0034] S2, curing the precursor solution to obtain a gel material.

[0035] S3, uniformly smearing the silicone elastomer solution on the surface of the gel material, and after solidifying again, obtains the flexible gel material with a sound velocity gradient with a wide-band adjustable parameter.

[0036] In the embodiment of the present invention, the polymer compound is used to form a non-covalent cross-linked network as a gel matrix to realize the transition from liquid to flexible solid. By changing the concentration of polymer compound monomers and changing the c...

Embodiment 1

[0048] This embodiment provides a method for preparing an acoustic gradient flexible gel material with broadband adjustable parameters. The steps are as follows:

[0049] S1. Prepare an aqueous solution of acrylamide with monomer mass fractions of 15%, 20%, 25%, 30%, and 35% respectively, and stir and mix evenly to obtain a monomer solution.

[0050] S2, adding glycerol to the monomer solution, the mass ratio of the glycerol to the water in step S1 is 0.5:1, respectively, and stirring uniformly to obtain a first mixed solution.

[0051] S3, adding 0.4% potassium persulfate and N,N'-methylenebisacrylamide of the same mass relative to the mass fraction of acrylamide monomer into the first mixed solution, stirring and mixing uniformly to obtain a second mixed solution.

[0052] S4. The second mixed solution is placed in an ultrasonic cleaning machine and a vacuum box in turn to completely remove foam to obtain a precursor solution.

[0053] S5. The precursor solution is placed i...

Embodiment 2

[0057] This embodiment provides a method for preparing an acoustic gradient flexible gel material with broadband adjustable parameters. The steps are as follows:

[0058] S1. Prepare an aqueous solution of acrylamide with monomer mass fractions of 15%, 20%, 25%, 30%, and 35% respectively, and stir and mix evenly to obtain a monomer solution.

[0059] S2, adding glycerol to the monomer solution, the mass ratio of the glycerol to the water in step S1 is 1:1 respectively, and stirring uniformly to obtain a first mixed solution.

[0060] S3, adding 0.4% potassium persulfate and N,N'-methylenebisacrylamide of the same mass relative to the mass fraction of acrylamide monomer into the first mixed solution, stirring and mixing uniformly to obtain a second mixed solution.

[0061] S4. The second mixed solution is placed in an ultrasonic cleaning machine and a vacuum box in turn to completely remove foam to obtain a precursor solution.

[0062] S5. The precursor solution is placed in a...

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Abstract

The invention provides a preparation method of a broadband parameter-adjustable sound velocity gradient flexible gel material, which comprises the following steps: S1, adding glycerol into a high-molecular compound monomer solution, uniformly stirring, adding an initiator and a cross-linking agent, uniformly stirring, and defoaming to obtain a precursor solution; s2, curing the precursor solution to obtain a gel material; and S3, uniformly smearing a silicon elastomer solution on the surface of the gel material, and curing again to obtain the sound velocity gradient flexible gel material with the broadband adjustable parameters. The sound velocity gradient flexible gel material with adjustable broadband parameters has broadband performance, and can realize sound velocity regulation and control in a certain range.

Description

technical field [0001] The invention relates to a sound velocity gradient flexible gel material with wide-band adjustable parameters and a preparation method thereof, belonging to the technical field of acoustic materials. Background technique [0002] Sonic gradient material refers to a gradient material with a specific sound velocity or acoustic refractive index change. Sonic gradient materials do not exist in nature and need to be designed manually. Phononic crystals and acoustic metamaterials can achieve extraordinary propagation characteristics of sound waves. Non-resonant phononic crystals in the low frequency range behave as uniform and non-dispersive materials, and sound velocity gradient materials can be realized by adjusting their equivalent parameters. At present, the methods for preparing sound velocity gradient materials mainly include controlling the filling rate of scatterers, rotating the angle of triangular scatterers, and preparing spatially curled structu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08L33/26C08K5/053C08F220/56C08F222/38
CPCC08J7/0427C08F220/56C08J2333/26C08J2483/04C08K5/053C08F222/385Y02T90/00
Inventor 张金虎惠健刚张宇
Owner XIAMEN UNIV
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