CN206157082U - Super material of acoustics - Google Patents
Super material of acoustics Download PDFInfo
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- CN206157082U CN206157082U CN201621138742.1U CN201621138742U CN206157082U CN 206157082 U CN206157082 U CN 206157082U CN 201621138742 U CN201621138742 U CN 201621138742U CN 206157082 U CN206157082 U CN 206157082U
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Abstract
The utility model discloses a super material of acoustics. The utility model discloses super material of acoustics includes the resin base member a plurality of ripples micro -structures of inhaling have been inlayed in the resin base member, it is the nucleocapsid structure to inhale the ripples micro -structure, the nucleocapsid structure uses metal particles as the nucleosome to the elastomer is shell and cladding the nucleosome. The utility model discloses super material of acoustics can absorb the sound wave of different frequency, but also has performances such as excellent mechanical properties, non -corrosibility ability, fire behaviour and protection against the tide.
Description
Technical field
The utility model belongs to sound-absorbing material technical field, and in particular to a kind of acoustic metamaterial.
Background technology
With modern science and technology and industrial expansion, noise pollution has become global problem, and sqouynd absorption lowering noise is gradually developed
For an important topic about each side such as science and technology, environment, mankind's coordinated development or even modern militaries.
Therefore, various sound-absorbing materials are produced therewith, sound-absorbing material is widely used as at present be selected from mineral wool,
The organic fiber class pads such as the inorfil class pad such as rock wool, polyester, sintering metal foaming body, glass foaming body, ware foaming body,
The Porous base material of the foaming bodies such as cement foamed body, cellular rubber, polyurethane foam, melamine foamed plastic etc..These Porous
Base material has the fine spaces such as the complicated bubble and pore stream of connection, that is to say that existing sound-absorbing material is more by itself
Permeability, membrane action or resonant interaction and there is the material of absorption to incident acoustic energy.When sound wave incident is to Porous base material
When, the air viscosity resistance and the friction of material, the vibration of material due to the fine space, acoustic energy is converted into heat, so that
Obtain sound wave to be absorbed by porous material.
But, although these sound absorption characteristics of Porous base material in high-frequency region are excellent, and in below 2000Hz
Sound absorption characteristics in frequency and low frequency region are poor.By the thickness for increasing Porous base material, although can improve in intermediate frequency and low
Sound absorption characteristics in frequency domain, but be not reaching to be enough to gratifying effect.Additionally, as the thickness of Porous base material increases
Plus, the material cost of sound-absorbing material increases, and also, by increasing weight, thickness, can there is a problem of damaging application property, and
Fibrous material or foamed material prepare sound-absorbing material and also there is a problem of that poor mechanical property, inflammable, Yi Chao, antiseptic property are poor.
Utility model content
The purpose of this utility model is the above-mentioned deficiency for overcoming prior art, there is provided a kind of acoustic metamaterial, to solve
It is existing for sound-absorbing material sound absorption characteristics be particularly poor sound absorption characteristics in intermediate frequency and low frequency region and poor mechanical property, it is inflammable,
The technical problem of Yi Chao, antiseptic property difference.
In order to realize above-mentioned utility model purpose, the utility model is on the one hand, there is provided a kind of acoustic metamaterial.The sound
Learn Meta Materials and some suction ripple micro-structurals are also embedded with the resin matrix including resin matrix, the suction ripple micro-structural is nucleocapsid
Structure；The core shell structure is, with metallic particles as nucleome, with elastomer as shell and to coat the nucleome.
Compared with prior art, the suction ripple micro-structural contained by the utility model acoustic metamaterial coats metal using elastomer
Particle, to form the local resonance unit for inhaling ripple micro-structural, can flexibly to the control realization of metallic particles particle diameter it is different frequently
Equivalent negative mass density is reached at rate, so as to the sound wave for realizing different frequency is absorbed.In addition, the super material of the utility model acoustics
Material can also by the control and selection to resin matrix, give the utility model acoustic metamaterial have excellent mechanical property,
The performances such as antiseptic property, fire resistance and protection against the tide.
Description of the drawings
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing：
The acoustic metamaterial main structure diagram that Fig. 1 is provided for the utility model embodiment；
The acoustic metamaterial that Fig. 2 is provided for the utility model embodiment according to A-A ' in Fig. 1 a kind of structural representation in section
Figure；
Fig. 3 shows for the acoustic metamaterial that the utility model embodiment is provided according to the section another kind structure of A-A ' in Fig. 1
It is intended to；
The structural representation of the suction ripple micro-structural contained by the acoustic metamaterial that Fig. 4 is provided for the utility model embodiment.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only to explain
The utility model, is not used to limit the utility model.
On the one hand, the utility model embodiment provides a kind of acoustic metamaterial with good sound absorption effect.It is real one
In applying example, the acoustic metamaterial includes resin matrix 1 and some suction ripple micro-structurals 2, as Figure 1-4.
The resin matrix 1 is used to load the suction ripple micro-structural 2, therefore, as long as the micro- knot of the suction ripple can be loaded
All the presented structure of structure 2 is in the scope disclosed in the utility model specification.In one embodiment, the resin base
The planform of body 1 can flexibly be arranged according to the needs of the utility model embodiment acoustic metamaterial concrete application, such as be existed
In specific embodiment, the resin matrix 1 can be substrate.In a particular embodiment, the resin matrix 1 can be 2-5cm
Substrate.
In addition, as long as the resin matrix 1 that all resin materials that can load the suction ripple micro-structural 2 are formed is also equal
In the scope disclosed in the utility model specification.In one embodiment, the material of resin matrix 1 is from epoxy resin, phenol
At least one in urea formaldehyde, cyanate ester resin.Selected resin such as epoxy resin is used as the material of resin matrix 1 so that this
Utility model embodiment acoustic metamaterial not only has excellent mechanical property, also with excellent antiseptic property, fire resistance
With the performance such as protection against the tide, in addition, can also facilitate being loaded to the suction ripple micro-structural 2.
Some suction ripple micro-structurals 2 contained by acoustic metamaterial are built-in in the resin matrix 1, the specific suction ripple
Micro-structural 2 can be embedded in the surface of resin matrix 1, it is also possible to be embedded in the inside of matrix 1, as shown in Figure 2.It is being preferable to carry out
In example, inhale ripple micro-structural 2 and be arranged to be embedded in the inside of resin matrix 1, as shown in figure 3, being surpassed with improving the utility model acoustics
The stability of the sound absorbing capabilities of material.
In addition, the distribution of the suction ripple micro-structural 2 in resin matrix 1 can be random distribution, in one embodiment, by institute
State suction ripple micro-structural 2 to be embedded in inside the resin matrix 1 by cubic lattice structure, imitated with the sound absorption for improving acoustic metamaterial
Really.Wherein, cubic lattice structure should be understood the cubic lattice distributed architecture described in any art routine.
In one embodiment, the structure for inhaling ripple micro-structural 2 is with metallic particles as shown in figure 4, it is core shell structure
21 is nucleome, with elastomer 22 as shell and coats the nucleome of the metallic particles 21.
Wherein, the particle diameter of the metallic particles 21 can be adjusted according to the frequency of sound wave, to realize different frequency
Wave band is absorbed.In one embodiment, the particle diameter 4-10mm of the metallic particles 21.Such as in one embodiment, by metallic particles
21 size controlling is 4-8mm, and 22 layers of the elastomer coats the metallic particles 21 of the particle size range so that the metal of the particle diameter
Particle 21 occurs under synergistic effect for 22 layers with elastomer, to realize absorbing high-frequency sound wave.In another embodiment, will
The size controlling of metallic particles 21 is 6-10mm, and 22 layers of the elastomer coats the metallic particles 21 of the particle size range so that should
The metallic particles 21 of particle diameter occurs under synergistic effect for 22 layers with elastomer, to realize absorbing low frequency sound wave.
In a further embodiment, the metallic particles 21 is included into that the first metallic particles and particle diameter that particle diameter is 6-10 are
Second metallic particles of 4-8；And the quantity of first metallic particles and the second metallic particles is according to 1：(1-2).The elasticity
22 layers of body is respectively coated by the first metallic particles of the particle size range and the second metallic particles 21, by bulky grain particle diameter and little particle grain
The metallic particles 21 in footpath carries out compounding use so that 22 layers of generation synergistic effect of the metal particles 21 of the composite-grain diameter and elastomer
Under, to realize absorbing broadband sound wave.
On the basis of the various embodiments described above, the metallic particles is at least in lead particle, iron particle, nickel particle
Kind.
The shell of the elastomer 22 is coated on the nucleome envelope of the metallic particles 21, forms the resilient buffering of a tool
Layer, when Acoustic Wave Propagation is to elastomer 22, the shell of elastomer 22 plays synergistic effect with metallic particles 21, to realize to sound
Ripple absorbs the effect for playing noise elimination.In one embodiment, the THICKNESS CONTROL of the shell of elastomer 22 is 2-3mm.By to elastomer
The control of 22 shell thicknesses so as to synergistic effect occurs with the metallic particles 21 of variable grain, the suction ripple for inhaling ripple micro-structural is improved
Effect.In a particular embodiment, the elastomer 22 is from least one in silicon rubber, fluorubber.
Therefore, by described above, the suction ripple micro-structural 2 contained by the utility model embodiment acoustic metamaterial adopts elastomer
22 coating metal particles 21, to form the local resonance unit for inhaling ripple micro-structural so that elastomer 22 plays the buffering work for inhaling ripple
With realizing acoustically effective.By the control of the particle diameter to metallic particles 21 and the thickness of 22 layers of elastomer, realize to inhaling the micro- knot of ripple
The size Control of structure 2 so that the utility model embodiment acoustic metamaterial can be realized reaching equivalent negative matter at different frequency
Metric density, so as to the sound wave for realizing different frequency is absorbed.In addition, the utility model embodiment acoustic metamaterial can also pass through
Control and selection to matrix material, gives the utility model acoustic metamaterial excellent mechanical property, antiseptic property, anti-flammability
The performance such as energy and protection against the tide.
In one embodiment, the utility model embodiment acoustic metamaterial mentioned above can be prepared as follows method
Prepare.With reference to accompanying drawing 1-4, the preparation method of the utility model embodiment acoustic metamaterial comprises the steps：
Step S01：The elastomer of the cladding metallic particles is formed in surface of metal particles；
Step S02：Some elastomers for being coated with the metallic particles are dispersed in resin prepreg material, are carried out at solidification
Reason.
Specifically, the metal as above described in text utility model acoustic metamaterial of the metallic particles in above-mentioned steps S01
Particle 21, elastomer is also the elastomer 22 in as above text utility model embodiment acoustic metamaterial, in order to save a piece
Width, will not be described here.In one embodiment, also included to the gold before the elastomer is formed to surface of metal particles
The step of prerinse of metal particles is processed.It is to remove metallic particles due to remaining in process that the prerinse is processed
The impurity enclosed in impurity, or subsequent technique, to improve subsequent step in PROCESS FOR TREATMENT, as strengthen elastomer clad structure
Stability.In one embodiment, it is first to be washed with watery hydrochloric acid the prerinse of the metallic particles to be processed, then is rinsed with water.
Be to the dried process Jing after prerinse is processed in order to remove pre-cleaning process in the solvent that remains, such as water.In an embodiment
In, dried process is that the metallic particles Jing after prerinse is processed is dried into 1-3 hours in 120-150 DEG C；
In addition, when metallic particles has different-grain diameter scope, the formation of elastomer and following step S02 is carried out for convenience
In technique, before prerinse or after dried process, the classification of particle diameter is preferably carried out to the metallic particles.It is more excellent
Choosing is the classification that particle diameter was carried out before prerinse.
In one embodiment, the forming method of the elastomer is as follows：
Metallic particles described in step S01 is put in mould, injection elastomer glue, crosslinking agent and catalyst, true
Curing molding process is carried out in Altitude.
Wherein, the amount for injecting elastomer glue is the thickness and the particle diameter of metallic particles of the elastomer layer according to solidifying to form
And adjust.In one embodiment, at least one of the elastomer glue in silicon rubber glue, fluorubber glue.Another
In embodiment, crosslinking agent is selected from many alkoxy silanes, many butanone oximino silanes, many acetoxylsilanes, many amino containing silanes, many acyls
At least one in amino containing silane, many iso-propenyloxysilanes, containing hydrogen silicone oil, or further, the crosslinking agent and elastomer
The mass ratio of glue is (5-30)：100.In another embodiment, the catalyst is selected from organotin, titanate esters, amine extremely
Few one kind, or further, the catalyst is (5-15) with the mass ratio of elastomer glue：100.By to elastomer precursor gum
The species of liquid, crosslinking agent and catalyst or further to the control of consumption so that elastomer glue is in crosslinking agent and catalyst
Under effect, there is molecule cross-link reaction and generate elastomer, and improve the synergistic effect between the elastomer and metallic particles, with reality
The effect of noise elimination is now played to wave absorption.
In above-mentioned steps S02, after the metallic particles for being coated with the elastomer is dispersed in resin prepreg material, metal
Grain can be dispersed in resin prepreg material, so as to ensure final preparation acoustic metamaterial acoustically effective and its performance it is steady
It is qualitative.
May be according to the characteristic of resin prepreg material according to normal by the curing process for being dispersed with the resin prepreg material of metallic particles
Rule process conditions solidified, preferably curing process process or before vacuum defoamation process is carried out to resin prepreg material.
In one embodiment, also contain curing agent in the fat prepreg, and curing process is carried out in vacuum environment.In an embodiment
In, resin prepreg material is selected from from least one resin prepreg material in epoxy resin, phenolic resin, cyanate ester resin.Another
In one embodiment, curing agent is in ethylenediamine, diethylenetriamine, triethylene tetramine, TEPA, dipropylenetriamine etc.
At least one, or further, the curing agent is (10-30) with the mass ratio of resin prepreg material：100.By pre- to resin
Leaching material is with the species of the second curing agent or further to the control of consumption so that resin prepreg material is urged in the second crosslinking agent and second
In the presence of agent, there is the resin matrix that molecule cross-link reaction generates stable performance.
The utility model acoustic metamaterial is directly coated using elastomer to metallic particles, so as to not only cause to be formed
Inhale the effect that can absorb sound of ripple micro-structural resonating member, and ensure that the uniformity of elastomer clad, improve its non-defective unit
Rate, so as to improve the acoustic metamaterial acoustically effective of preparation.In addition, the method process conditions are controllable, the super material of acoustics of preparation
Material stable performance, and production efficiency is high, reduces production cost.
Because there is the utility model embodiment acoustic metamaterial the sound wave that can realize different frequency described above to carry out
Absorption characteristic, and with performances such as excellent mechanical property, antiseptic property, fire resistance and protection against the tide, and its preparation method
The advantages of ensure that stablizing for its sound absorbing capabilities, low production cost, it can be widely applied in the field of correlation,
Such as by the utility model embodiment acoustic metamaterial be applied to automobile engine, aircraft engine, submarine, machinery, server,
In aircraft cockpit, construction material.Have good noise elimination special so as to give the equipment for containing the utility model acoustic metamaterial
Property, reduce noise pollution.
On the other hand, based on acoustic metamaterial mentioned above, the utility model embodiment additionally provides a kind of with suction
The wide device of acoustic frequency, described device includes acoustic metamaterial part, and the acoustic metamaterial part is 1-7 arbitrary described
Acoustic metamaterial.Due to being as acoustic metamaterial part using acoustic metamaterial mentioned above.Therefore, the device has right
The characteristic that the sound wave of different frequency is absorbed, and good absorbing effect, and acoustic metamaterial part mechanical property, anti-corrosive properties
The performances such as energy, fire resistance and protection against the tide are good.
Multiple above-mentioned acoustic metamaterial embodiments are now provided, the utility model is further elaborated.
Embodiment 1
The present embodiment provides a kind of acoustic metamaterial and preparation method thereof.The structure of the present embodiment acoustic metamaterial such as accompanying drawing
Shown in 1-4, it includes epoxy resin-base 1 and some suction ripples for being embedded in epoxy resin-base 1 by cubic lattice structure are micro-
Structure 2；Wherein, the suction ripple micro-structural 2 is with metallic particles 21 as nucleome, with elastomer 22 as shell and coats the metal
21 nucleomes of grain, and the lead particle of a diameter of 10mm of the metallic particles 21, the layer material of elastomer 22 is silicon rubber, THICKNESS CONTROL
For 2mm.The acoustic metamaterial has to be produced at low frequency bears equivalent mass density feature.
The present embodiment acoustic metamaterial preparation method is as follows：
S11：Lead metal particle is carried out to filter out the metallic particles of 10mm；
S12：Metallic particles is first washed with watery hydrochloric acid, then is rinsed with water；
S13：In baking procedure S12 it is scrubbed after the metallic particles 1-3 hours are dried in 120-150 DEG C；
S14：The metallic particles of drying in step S13 is put into into the mold die of a diameter of 14mm sizes, injection correspondence
107 glue, and how alkoxy silane cross linked dose and organotin catalysts are added, and vacuumize, curing molding, obtain gold shown in Fig. 4
Category heart ball；
S15：The qualified lead heart ball for preparing of screening, and it is embedded in into epoxy resin prepolymer by cubic lattice structure
In leaching material；Ethylenediamine curing agent is added, is put in vacuum tank and is vacuumized, drain air entrapment, inject mould, fixed line shaping.
Embodiment 2
The present embodiment provides a kind of acoustic metamaterial and preparation method thereof.The structure of the present embodiment acoustic metamaterial such as accompanying drawing
Shown in 1-4, its structure is identical with the acoustic metamaterial in embodiment 1, and difference is the metallic particles 21 including straight
Footpath is the mixture of 10mm lead particle and 6mm iron particles, and using elastomer 22 layers be respectively coated by 10mm lead particle and 6mm iron
Grain, and the THICKNESS CONTROL of 22 layers of elastomer is 2mm, and the suction ripple micro-structural 2 of two kinds of particle diameters is pressed into quantity 1:1 and cubic lattice structure
It is embedded in phenolic resin as matrix resin 1.The acoustic metamaterial has in wide-band microwave absorbing property.
The present embodiment acoustic metamaterial preparation method is as follows：
S21-S23：A diameter of 10mm lead particle and 6mm iron particles are obtained respectively according to step S11-S12 in embodiment 1；
A diameter of 10mm lead particle of drying in step S23 is put into a diameter of 14mm and 6mm iron particles and is put into directly by S24
Footpath is the mold die of 10mm sizes, injects 107 glues of correspondence, and adds many amino containing silane crosslinking agents and titanate catalyst,
And vacuumize, curing molding, obtain lead heart ball shown in Fig. 4；
S25：The qualified lead heart ball for preparing of screening, and pressed quantity 1:1 and cubic lattice structure be embedded in
In phenolic resin preimpregnation material；Ethylenediamine curing agent is added, is put in vacuum tank and is vacuumized, drain air entrapment, inject mould, Gu
Words shaping.
Embodiment 3
The present embodiment provides a kind of acoustic metamaterial and preparation method thereof.The structure of the present embodiment acoustic metamaterial such as accompanying drawing
Shown in 1-4, its structure is identical with the acoustic metamaterial in embodiment 1, and it is a diameter of that difference is the metallic particles 21
The nickel particle of 2mm, the thickness degree of elastomer 22 is controlled to 1mm.The acoustic metamaterial has close in the negative equivalent mass of high frequency treatment generation
Degree characteristic.
The acoustic metamaterial has in wide-band microwave absorbing property.
The present embodiment acoustic metamaterial preparation method is as follows：
S31-S33：The nickel particle of a diameter of 2mm is obtained according to step S11-S12 in embodiment 1；
The metallic particles of drying in step S23 is put into S34 the mold die of a diameter of 4mm sizes, injection correspondence fluorine
Rubber, and many iso-propenyloxysilane crosslinking agents and amine catalyst are added, and vacuumize, curing molding, obtain metal shown in Fig. 4
Heart ball；
S35：The qualified lead heart ball for preparing of screening, cyanate ester resin is embedded in by design by cubic lattice structure
In prepreg；Add triethylene tetramine curing agent, be put in vacuum tank and vacuumize, drain air entrapment, inject mould, fixed line into
Type.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., all should be included in the utility model
Protection domain within.
Claims (10)
1. a kind of acoustic metamaterial, including resin matrix, it is characterised in that：The micro- knot of some suction ripples is embedded with the resin matrix
Structure, the suction ripple micro-structural is core shell structure；The core shell structure is, with metallic particles as nucleome, with elastomer as shell and to wrap
Cover the nucleome.
2. acoustic metamaterial according to claim 1, it is characterised in that：The thickness of the shell is 2-3mm.
3. acoustic metamaterial according to claim 1, it is characterised in that：The particle diameter of the metallic particles is 4-10mm.
4. acoustic metamaterial according to claim 3, it is characterised in that：The metallic particles includes that particle diameter is 6-10mm's
First metallic particles and the second metallic particles that particle diameter is 4-8mm；And the number of first metallic particles and the second metallic particles
Amount ratio is according to 1：(1-2).
5. acoustic metamaterial according to claim 1, it is characterised in that：The metallic particles is lead particle, iron particle, nickel
At least one in particle.
6. acoustic metamaterial according to claim 1, it is characterised in that：The suction ripple micro-structural is by cubic lattice structure
It is embedded in inside the resin matrix.
7. acoustic metamaterial according to claim 1, it is characterised in that：The thickness of the resin matrix is 2-5cm.
8. acoustic metamaterial according to claim 1, it is characterised in that：The suction ripple micro-structural is built-in the resin
The surface of matrix or/and it is embedded in the inside of the resin matrix.
9. acoustic metamaterial according to claim 1, it is characterised in that：The resin of the resin matrix selects asphalt mixtures modified by epoxy resin
At least one in fat, phenolic resin, cyanate ester resin.
10. acoustic metamaterial according to claim 1, it is characterised in that：The elastomer is from silicon rubber, fluorubber
At least one.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621138742.1U CN206157082U (en) | 2016-10-19 | 2016-10-19 | Super material of acoustics |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621138742.1U CN206157082U (en) | 2016-10-19 | 2016-10-19 | Super material of acoustics |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106297762A (en) * | 2016-08-16 | 2017-01-04 | 南京工业大学 | A kind of method that nonlinear characteristic utilizing Helmholtz resonator changes acoustics metamaterial passband |
| CN107401225A (en) * | 2017-09-08 | 2017-11-28 | 北京市劳动保护科学研究所 | The sound absorption and insulation structure that a kind of flexible particle is piled up |
| CN108847210A (en) * | 2018-04-27 | 2018-11-20 | 哈尔滨工程大学 | A kind of modulated parameter acoustic metamaterial structure |
| CN110014709A (en) * | 2019-03-12 | 2019-07-16 | 北京化工大学 | Polyurethane elastomer phonon crystal noise reduction film and its manufacturing method |
| CN110709175A (en) * | 2017-06-09 | 2020-01-17 | 罗伯特·博世有限公司 | Ultrasonic sensor |
-
2016
- 2016-10-19 CN CN201621138742.1U patent/CN206157082U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106297762A (en) * | 2016-08-16 | 2017-01-04 | 南京工业大学 | A kind of method that nonlinear characteristic utilizing Helmholtz resonator changes acoustics metamaterial passband |
| CN110709175A (en) * | 2017-06-09 | 2020-01-17 | 罗伯特·博世有限公司 | Ultrasonic sensor |
| CN107401225A (en) * | 2017-09-08 | 2017-11-28 | 北京市劳动保护科学研究所 | The sound absorption and insulation structure that a kind of flexible particle is piled up |
| CN108847210A (en) * | 2018-04-27 | 2018-11-20 | 哈尔滨工程大学 | A kind of modulated parameter acoustic metamaterial structure |
| CN110014709A (en) * | 2019-03-12 | 2019-07-16 | 北京化工大学 | Polyurethane elastomer phonon crystal noise reduction film and its manufacturing method |
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