CN116253331A - Phosphor-aluminum molecular sieve acoustic enhancement material, preparation method thereof, loudspeaker and electronic equipment - Google Patents
Phosphor-aluminum molecular sieve acoustic enhancement material, preparation method thereof, loudspeaker and electronic equipment Download PDFInfo
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- CN116253331A CN116253331A CN202310197878.8A CN202310197878A CN116253331A CN 116253331 A CN116253331 A CN 116253331A CN 202310197878 A CN202310197878 A CN 202310197878A CN 116253331 A CN116253331 A CN 116253331A
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- 239000002808 molecular sieve Substances 0.000 title claims abstract description 173
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 title claims abstract description 173
- URRHWTYOQNLUKY-UHFFFAOYSA-N [AlH3].[P] Chemical compound [AlH3].[P] URRHWTYOQNLUKY-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 239000000463 material Substances 0.000 title claims abstract description 85
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000011230 binding agent Substances 0.000 claims abstract description 37
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 30
- 239000011574 phosphorus Substances 0.000 claims abstract description 30
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 29
- 239000002270 dispersing agent Substances 0.000 claims abstract description 21
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 19
- 238000000465 moulding Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 30
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 20
- 239000012779 reinforcing material Substances 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 235000011187 glycerol Nutrition 0.000 claims description 10
- 239000004005 microsphere Substances 0.000 claims description 8
- 229910021487 silica fume Inorganic materials 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims description 7
- 229940057995 liquid paraffin Drugs 0.000 claims description 6
- 238000001694 spray drying Methods 0.000 claims description 6
- -1 acrylic ester Chemical class 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 5
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 5
- VHSHLMUCYSAUQU-UHFFFAOYSA-N 2-hydroxypropyl methacrylate Chemical compound CC(O)COC(=O)C(C)=C VHSHLMUCYSAUQU-UHFFFAOYSA-N 0.000 claims description 4
- 239000005995 Aluminium silicate Substances 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 4
- 239000005909 Kieselgur Substances 0.000 claims description 4
- 235000012211 aluminium silicate Nutrition 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 235000019353 potassium silicate Nutrition 0.000 claims description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 239000002671 adjuvant Substances 0.000 claims description 2
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 claims description 2
- 239000000440 bentonite Substances 0.000 claims description 2
- 229910000278 bentonite Inorganic materials 0.000 claims description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 2
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 2
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000004984 smart glass Substances 0.000 claims description 2
- 239000011358 absorbing material Substances 0.000 abstract description 13
- 239000000523 sample Substances 0.000 description 31
- 239000013074 reference sample Substances 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 238000010521 absorption reaction Methods 0.000 description 9
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 7
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 6
- 239000013065 commercial product Substances 0.000 description 6
- 238000004108 freeze drying Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 238000001878 scanning electron micrograph Methods 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UGACIEPFGXRWCH-UHFFFAOYSA-N [Si].[Ti] Chemical compound [Si].[Ti] UGACIEPFGXRWCH-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000001453 impedance spectrum Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000012814 acoustic material Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/54—Phosphates, e.g. APO or SAPO compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B37/00—Compounds having molecular sieve properties but not having base-exchange properties
- C01B37/04—Aluminophosphates [APO compounds]
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Materials Engineering (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention provides a phosphorus-aluminum molecular sieve acoustic enhancement material, a preparation method thereof, a loudspeaker and electronic equipment, wherein the phosphorus-aluminum molecular sieve acoustic enhancement material is prepared by uniformly mixing phosphorus-aluminum molecular sieve, binder, dispersing agent and other auxiliary agents and then molding; wherein, based on the total weight of the phosphorus-aluminum molecular sieve acoustic enhancement material being 100%, the content of the phosphorus-aluminum molecular sieve is not less than 70%, the dry basis content of the dispersing agent is 0-1%, and the dry basis content of the other auxiliary agents is 0-15%; the molar ratio of elements of phosphorus and aluminum in the phosphorus and aluminum molecular sieve is 0.3:1-1:1, and the specific surface area is 600-900m 2 And/g. The sound-absorbing material filled in the rear cavity of the loudspeaker can obviously enhance the acoustic performance of the loudspeaker.
Description
Technical Field
The invention relates to an aluminum phosphorus molecular sieve acoustic enhancement material, a preparation method thereof, a loudspeaker and electronic equipment, and belongs to the technical field of materials, in particular to the technical field of electronic acoustic materials.
Background
The improvement of social economy and consumption level makes people have higher and higher demands on life quality, and mobile phones as the most important electronic consumer products play a very important role in life, and the quality of the speaker as an important part of the mobile phones is also more and more important.
The filling of sound absorbing materials into loudspeakers is currently the most popular method for enhancing the sound performance of loudspeakers, and sound absorbing materials have also been transformed from the original sound absorbing cotton, activated carbon, etc. to the current zeolite materials. Among them, zeolite is also called molecular sieve, which has a regular pore structure, particularly a large number of micropores, and has excellent sound adsorption performance.
At present, the molecular sieve material used in the loudspeaker is generally ZSM-5 molecular sieve with MFI structure, and the specific surface area is 300-400m 2 And/g. In general, the larger the specific surface area of a molecular sieve, the better its acoustic properties. Currently, the popular trend of the loudspeaker is to develop miniaturization and thinness, and the requirements on molecular sieve materials in the loudspeaker are also higher and higher, and the aluminum phosphate molecular sieve is one of molecular sieves, and is different from the silicon aluminum molecular sieve, larger in specific surface area and electrically neutral.
Therefore, providing a novel phosphorus-aluminum molecular sieve acoustic enhancement material, a preparation method thereof, a loudspeaker and electronic equipment has become a technical problem to be solved in the field.
Disclosure of Invention
In order to solve the above-mentioned disadvantages and shortcomings, it is an object of the present invention to provide an acoustical enhancement material of a phosphorus-aluminum molecular sieve.
The invention also aims at providing a preparation method of the phosphorus-aluminum molecular sieve acoustic reinforcing material.
It is a further object of the present invention to provide a loudspeaker having a rear chamber fitted with the above-described phosphorus-aluminum molecular sieve acoustical enhancement material.
It is also an object of the invention to provide an electronic device comprising a loudspeaker as described above.
In order to achieve the above purpose, in one aspect, the invention provides a phosphorus-aluminum molecular sieve acoustic enhancement material, wherein the phosphorus-aluminum molecular sieve acoustic enhancement material is prepared by uniformly mixing phosphorus-aluminum molecular sieve, binder, dispersing agent and other auxiliary agents, and then molding; wherein, based on the total weight of the phosphorus-aluminum molecular sieve acoustic enhancement material being 100%, the content of the phosphorus-aluminum molecular sieve is not less than 70%, the dry basis content of the dispersing agent is 0-1%, and the dry basis content of the other auxiliary agents is 0-15%;
the molar ratio of elements of phosphorus and aluminum in the phosphorus and aluminum molecular sieve is 0.3:1-1:1, and the specific surface area is 600-900m 2 /g。
As a specific embodiment of the above-mentioned phosphoaluminum molecular sieve acoustic enhancement material of the present invention, the skeleton structure of the phosphoaluminum molecular sieve includes one or several of CHA, LTA, FAU, AFI, VFI, AET and the like.
As a specific embodiment of the above-mentioned phosphorus-aluminum molecular sieve acoustic enhancement material, the skeleton element composition of the phosphorus-aluminum molecular sieve is phosphorus, aluminum and oxygen.
As a specific embodiment of the above-mentioned phosphorus-aluminum molecular sieve acoustic enhancement material of the present invention, the grain size of the phosphorus-aluminum molecular sieve is 20-500nm.
As a specific embodiment of the above-mentioned phosphorus-aluminum molecular sieve acoustic reinforcing material according to the present invention, the content of the binder is 1-15% based on 100% of the total weight of the phosphorus-aluminum molecular sieve acoustic reinforcing material, wherein the content of the binder is based on the content of solid components in the binder.
As a specific embodiment of the above-mentioned phosphorus-aluminum molecular sieve acoustic reinforcing material of the present invention, wherein the binder comprises an inorganic binder and/or an organic binder;
wherein the inorganic binder comprises one or a mixture of a plurality of silica sol, alumina sol, water glass, pseudo-boehmite and the like; the organic binder comprises one or a mixture of a plurality of acrylic esters, epoxy and polyurethane organic binders.
As a specific embodiment of the above-mentioned phosphorus-aluminum molecular sieve acoustic enhancement material of the present invention, the dispersant includes one or a mixture of several of glycerin, HPMA, liquid paraffin, and the like.
In some embodiments of the invention, the dispersant may be present in a dry basis of, for example, 0.88%, 0.93%, 0.43%, etc., based on 100% total weight of the phosphoaluminous molecular sieve acoustical enhancement material.
As a specific embodiment of the above-mentioned phosphorus-aluminum molecular sieve acoustic enhancement material, the other auxiliary agents comprise one or a mixture of more of kaolin, diatomite, silica fume, bentonite, montmorillonite and the like.
In some embodiments of the invention, the other adjuvants may be present, for example, in a dry basis of 14.06%, 3.67%, 4.49%, 4.37%, etc., based on 100% total weight of the phosphoaluminous molecular sieve acoustic reinforcement material.
As a specific embodiment of the above-mentioned phosphoaluminum molecular sieve acoustic enhancement material according to the present invention, the shape of the phosphoaluminum molecular sieve acoustic enhancement material includes microspheres (particles), blocks or flakes.
As a specific embodiment of the above-mentioned phosphorus-aluminum molecular sieve acoustic enhancement material of the present invention, the size of the microspheres is 100-400 μm.
On the other hand, the invention also provides a preparation method of the phosphorus-aluminum molecular sieve acoustic enhancement material, wherein the preparation method comprises the following steps:
uniformly mixing a phosphorus-aluminum molecular sieve, a binder, a dispersing agent and other auxiliary agents to obtain a suspension, and then forming the suspension to obtain the phosphorus-aluminum molecular sieve acoustic enhancement material;
wherein, based on the total weight of the phosphorus-aluminum molecular sieve acoustic enhancement material being 100%, the content of the phosphorus-aluminum molecular sieve is not less than 70%, the dry basis content of the dispersing agent is 0-1%, and the dry basis content of the other auxiliary agents is 0-15%; the molar ratio of elements of phosphorus and aluminum in the phosphorus and aluminum molecular sieve is 0.3:1-1:1, and the specific surface area is 600-900m 2 /g。
As a specific embodiment of the above preparation method of the present invention, wherein the shaping comprises spray drying or freeze shaping.
The method for molding is not particularly required, and a person skilled in the art can reasonably select the method for molding according to actual operation needs, so long as the purpose of the invention can be realized. For example, when microspheres of the phosphorus-aluminum molecular sieve acoustic reinforcement material are to be prepared, the molding method may be spray drying, freeze molding, oil column molding, rolling ball method molding, or the like; when the phosphorus-aluminum molecular sieve acoustic enhancement material block or the phosphorus-aluminum molecular sieve acoustic enhancement material block is to be prepared, the phosphorus-aluminum molecular sieve acoustic enhancement material block can be molded by a hot air drying method.
In still another aspect, the invention further provides a loudspeaker, which comprises a shell, a sounding monomer and a rear cavity formed by surrounding the shell and the sounding monomer, wherein the rear cavity is assembled with the phosphorus-aluminum molecular sieve acoustic enhancement material. The sound-absorbing material filled in the rear cavity of the loudspeaker can obviously enhance the acoustic performance of the loudspeaker.
In still another aspect, the present invention further provides an electronic device, where the electronic device includes the speaker described above.
As a specific embodiment of the electronic device according to the present invention, the electronic device includes a smart phone, a TWS headset, a pair of smart glasses, a smart watch, a VR device, an AR device, a tablet computer, or a light and thin notebook computer.
Compared with the prior art, the invention has the following beneficial technical effects:
1) The prior loudspeaker sound absorbing material usually uses a silicon-aluminum molecular sieve or a titanium-silicon molecular sieve with an MFI structure, but the specific surface area of the silicon-aluminum molecular sieve with the MFI structure, namely the high silicon-aluminum molecular sieve, is smaller, and is generally only 300-400m 2 The sound absorbing material has poorer acoustic performance, and the phosphorus-aluminum molecular sieve acoustic reinforcing material provided by the invention comprises phosphorus-aluminum molecular sieve, wherein the specific surface area of the phosphorus-aluminum molecular sieve is large and is up to 600-900m 2 And/g, the absorption performance of sound is better when the sound absorbing material is used as the sound absorbing material.
2) The phosphorus-aluminum molecular sieve acoustic enhancement material provided by the invention comprises phosphorus-aluminum molecular sieves, wherein the skeleton elements of the phosphorus-aluminum molecular sieves consist of phosphorus, aluminum and oxygen, the molecular weight of the phosphorus is higher, after the phosphorus-aluminum molecular sieves are made into phosphorus-aluminum molecular sieve acoustic enhancement material particles, the bulk density is high, the sound absorption material filled in the rear cavity of a loudspeaker under the same volume has higher quality and better sound absorption performance.
3) The phosphorus-aluminum molecular sieve acoustic enhancement material provided by the invention comprises phosphorus-aluminum molecular sieve, wherein the phosphorus-aluminum molecular sieve is neutral, and the problem of static electricity in a rear cavity of a loudspeaker is avoided.
In conclusion, the sound-absorbing material filled in the rear cavity of the loudspeaker by using the phosphorus-aluminum molecular sieve acoustic reinforcing material provided by the invention can obviously enhance the acoustic performance of the loudspeaker.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for the description of the embodiments will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is an SEM image of a phosphoaluminous molecular sieve of CHA structure used in example 1 of the present invention.
Fig. 2 is an SEM image of sample # 1 provided in example 1 of the present invention.
Detailed Description
It should be noted that the term "comprising" in the description of the invention and the claims and any variations thereof in the above-described figures is intended to cover a non-exclusive inclusion, such as a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.
The "range" disclosed herein is given in the form of a lower limit and an upper limit. There may be one or more lower limits and one or more upper limits, respectively. The given range is defined by selecting a lower limit and an upper limit. The selected lower and upper limits define the boundaries of the particular ranges. All ranges defined in this way are combinable, i.e. any lower limit can be combined with any upper limit to form a range. For example, ranges of 60-120 and 80-110 are listed for specific parameters, with the understanding that ranges of 60-110 and 80-120 are also contemplated. Furthermore, if the minimum range values listed are 1 and 2 and the maximum range values listed are 3,4 and 5, then the following ranges are all contemplated: 1-3, 1-4, 1-5, 2-3, 2-4 and 2-5.
In the present invention, unless otherwise indicated, the numerical range "a-b" represents a shorthand representation of any combination of real numbers between a and b, where a and b are both real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" have been listed throughout this disclosure, and "0-5" is only a shorthand representation of a combination of these values.
In the present invention, all the embodiments and preferred embodiments mentioned in the present invention may be combined with each other to form new technical solutions, unless otherwise specified.
In the present invention, all technical features mentioned in the present invention and preferred technical features may be combined with each other to form a new technical solution unless specifically stated otherwise.
In the present invention, the term "two" as used in the present specification means "at least two" unless specifically indicated.
In the present invention, all the steps mentioned herein may be performed sequentially or randomly, but are preferably performed sequentially, unless otherwise specified. For example, the method comprises steps (a) and (b), meaning that the method may comprise steps (a) and (b) performed sequentially, or may comprise steps (b) and (a) performed sequentially. For example, the method may further include step (c), which means that step (c) may be added to the method in any order, for example, the method may include steps (a), (b) and (c), may include steps (a), (c) and (b), may include steps (c), (a) and (b), and the like.
The present invention will be further described in detail with reference to the accompanying drawings, figures and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. The following described embodiments are some, but not all, examples of the present invention and are merely illustrative of the present invention and should not be construed as limiting the scope of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used are not manufacturer specific, and are conventional products commercially available or may be prepared by methods known in the art. For example, the ZSM-5 molecular sieve and the phosphorus aluminum molecular sieve according to the invention are all molecular sieve materials known in the art, and can be directly purchased in the market or synthesized in the laboratory according to literature methods.
The phosphorus-aluminum molecular sieves used in the examples or the reference examples of the invention are purchased from Shanghai Zhuo Yue environmental protection new materials Co.
The water-based acrylate adhesive used in the embodiment or the reference example is a commercial product, and is purchased from Guanzhong Zhuang New Material science and technology Co., ltd, and has the model of PA-4867 and the viscosity of <2000 mPa.s.
The silica sol used in the embodiment of the invention is a commercial product purchased from Shandong Baite New Material Co., ltd, and has the model of HP3010, wherein the weight content of the silica is 30%.
The alumina sol used in the embodiment or the reference example of the invention is a commercial product purchased from the petrochemical company limited of Hunan Xinpeng, wherein the weight content of the alumina is 20%.
The water glass used in the embodiment of the invention is purchased from Yongtai chemical industry Co., ltd, wherein the weight content of silicon oxide is 25%.
The epoxy adhesive used in the embodiment of the invention is a commercial product purchased from Hunan Lint technology Co., ltd, and has the model of LINTEC EP-602PRO and the viscosity of 4000-6000cps.
The diatomaceous earth used in the examples or reference examples of the present invention was T-diatomaceous earth produced by tsaoko containing tai silicon, inc.
The microsilica used in the embodiment of the invention is a commercial product purchased from Ama Ding Shiji (Shanghai) limited company, the purity is more than 99%, and the granularity is 1 mu m.
The kaolin used in the embodiment of the invention is a commercial product purchased from China Kaolin Co., ltd, the model is hand 2# powder, and the solid content is 85%.
Example 1
The embodiment provides an aluminum phosphate molecular sieve acoustic reinforcing material, which is prepared by a preparation method comprising the following specific steps:
taking 100g of CHA structured phosphorus-aluminum molecular sieve, wherein the grain size DN50 is 258nm, and the specific surface area is 853m 2 30g of water-based acrylate adhesive with phosphorus-aluminum molar ratio of 0.93:1 and dry content of 40%, 1g of glycerin and 100g of water are mixed, fully stirred for 1h, and the mixture is formed by a freeze drying method to obtain the microspherical phosphorus-aluminum molecular sieve acoustic enhancement material, which is marked as sample No. 1, wherein the median diameter D50 of the sample No. 1 is 343 mu m.
Wherein, based on the total weight of the sample 1# as 100%, the composition is as follows: the content of the phosphorus-aluminum molecular sieve is 88.50%, the content of the binder (water-based acrylate binder) is 10.62%, the content of the dispersing agent (glycerin) is 0.88%, and the content of other auxiliary agents is 0%.
Example 2
The embodiment provides an aluminum phosphate molecular sieve acoustic reinforcing material, which is prepared by a preparation method comprising the following specific steps:
taking 100g of phosphorus-aluminum molecular sieve with LTA structure, wherein the grain size DN50 is 95nm, and the specific surface area is 887m 2 The mole ratio of phosphorus to aluminum in the molecular sieve is 0.56:1, 65g of silica sol with the weight content of 30 percent of silicon oxide, 24g of diatomite and 100g of water are fully stirred for 1h, and the microspherical phosphorus-aluminum molecular sieve acoustic reinforcing material is obtained through molding by a freeze drying method, and is marked as sample No. 2, and the median diameter D50 of the sample No. 2 is 298 mu m.
Wherein, based on the total weight of the sample No. 2 being 100%, the composition is as follows: the content of the phosphorus-aluminum molecular sieve is 71.92%, the content of the binder (silica sol) is 14.02%, the content of the dispersing agent is 0%, and the content of other auxiliary agents (diatomite) is 14.06%.
Example 3
The embodiment provides an aluminum phosphate molecular sieve acoustic reinforcing material, which is prepared by a preparation method comprising the following specific steps:
taking 100g of FAU structured phosphorus-aluminum molecular sieve, wherein the grain size DN50 is 151nm, and the specific surface area is 813m 2 The mole ratio of phosphorus to aluminum in the molecular sieve is 0.88:1, 15g of alumina sol with the weight content of 20 percent, 1g of liquid paraffin, 2g of silica fume and 100g of water are fully stirred for 1h, and the microspherical phosphorus-aluminum molecular sieve acoustic enhancement material is obtained by shaping through a spray drying method, and is marked as sample No. 3, and the median diameter D50 of the sample No. 3 is 134 mu m.
Wherein, based on the total weight of the sample 3# as 100%, the composition is as follows: the content of the phosphorus-aluminum molecular sieve is 92.63%, the content of the binder (aluminum sol) is 2.78%, the content of the dispersing agent (liquid paraffin) is 0.93%, and the content of other auxiliary agents (silica fume) is 3.66%.
Example 4
The embodiment provides an aluminum phosphate molecular sieve acoustic reinforcing material, which is prepared by a preparation method comprising the following specific steps:
taking 100g of an AFI structured phosphorus-aluminum molecular sieve, wherein the grain size DN50 is 353nm, the specific surface area is 625m <2 >/g, the molar ratio of phosphorus to aluminum in the molecular sieve is 0.34:1, the weight content of 30g of silicon oxide is 25%, 1g of liquid paraffin, 6g of silica fume and 100g of water, fully stirring for 1h, and forming by a spray drying method to obtain a microspherical phosphorus-aluminum molecular sieve acoustic enhancement material, wherein the microspherical phosphorus-aluminum molecular sieve acoustic enhancement material is marked as sample No. 4, and the median D50 of sample No. 4 is 159 mu m.
Wherein, based on the total weight of the sample No. 4 being 100%, the composition is as follows: the content of the phosphorus-aluminum molecular sieve is 88.03%, the content of the binder (water glass) is 6.60%, the content of the dispersing agent (liquid paraffin) is 0.88%, and the content of the other auxiliary agents (silica fume) is 4.49%.
Example 5
The embodiment provides an aluminum phosphate molecular sieve acoustic reinforcing material, which is prepared by a preparation method comprising the following specific steps:
taking 100g of VFI structured phosphorus-aluminum molecular sieve, wherein the grain size DN50 is 455nm, and the specific surface area is 713m 2 The mole ratio of phosphorus to aluminum in the molecular sieve is 0.61:1, 11g of epoxy binder, 0.5g of HPMA, 6g of kaolin and 100g of water, the materials are fully stirred for 1h, and the micro-spherical phosphorus-aluminum molecular sieve acoustic enhancement material is obtained through forming by a freeze drying method, and is marked as sample No. 5, and the median diameter D50 of the sample No. 5 is 302 mu m.
Wherein, based on the total weight of the sample No. 5 being 100%, the composition is as follows: the content of the phosphorus-aluminum molecular sieve is 85.77%, the content of the binder (epoxy binder) is 9.43%, the content of the dispersing agent (HPMA) is 0.43%, and the content of other auxiliary agents (silica fume) is 4.37%.
Reference example 1
The reference provides a ZSM-5 molecular sieve acoustical enhancement material, which is prepared by a preparation method comprising the following specific steps:
100g of ZSM-5 molecular sieve with a silicon-aluminum mass ratio of 400 (grain size DN50 is 104 nm), 30g of water-based acrylate binder with a dry basis content of 40%, 1g of glycerol and 100g of water are mixed, fully stirred for 1h, and a freeze-drying method is adopted to form the microsphere ZSM-5 molecular sieve acoustical enhancement material, the microsphere is marked as a reference sample 1#, and the median diameter D50 of the reference sample 1# is 356 mu m.
Wherein, based on the total weight of the reference sample 1# as 100%, the composition is as follows: the ZSM-5 molecular sieve content is 88.50%, the binder (water-based acrylate binder) content is 10.62%, the dispersant (glycerin) content is 0.88%, and the content of other auxiliary agents is 0%.
Reference example 2
The reference provides a ZSM-5 molecular sieve acoustical enhancement material, which is prepared by a preparation method comprising the following specific steps:
100g of ZSM-5 molecular sieve with a silicon-aluminum mass ratio of 800 (grain size DN50 is 412 nm), 10g of alumina sol with a weight content of 20 percent, 1g of glycerin, 2g of kieselguhr and 100g of water are taken, fully stirred for 1h, and a microspherical ZSM-5 molecular sieve acoustic enhancement material is obtained by forming through a spray drying method, and is marked as a reference sample No. 2, and the median diameter D50 of the reference sample No. 2 is 156 mu m.
Wherein, based on the total weight of the reference sample 2# as 100%, the composition is as follows: the ZSM-5 molecular sieve content was 95.24%, the binder (alumina sol) content was 1.905%, the dispersant (glycerin) content was 0.95%, and the other auxiliary agents (diatomaceous earth) content was 1.905%.
Reference example 3
The reference provides an acoustic enhancement material of a phosphorus-aluminum molecular sieve, which is prepared by a preparation method comprising the following specific steps:
taking 100g of CHA structured phosphorus-aluminum molecular sieve with the surface area of 823m 2 30g of water-based acrylate adhesive with phosphorus-aluminum molar ratio of 1.05:1 and dry content of 40%, 1g of glycerin and 100g of water are mixed, fully stirred for 1h, and the mixture is formed by a freeze drying method to obtain the microspherical phosphorus-aluminum molecular sieve acoustic enhancement material, wherein the microspherical phosphorus-aluminum molecular sieve acoustic enhancement material is marked as reference sample No. 3, and the median diameter D50 of the reference sample No. 3 is 356 mu m.
Wherein, based on the total weight of the reference sample 3# as 100%, the composition is as follows: the content of the phosphorus-aluminum molecular sieve is 88.50%, the content of the binder (water-based acrylate binder) is 10.62%, the content of the dispersing agent (glycerin) is 0.88%, and the content of other auxiliary agents is 0%.
Test example 1
This test example was subjected to SEM analysis of the CHA structured phosphoaluminous molecular sieve used in example 1 and sample # 1 provided in example 1, respectively, and the SEM images obtained are shown in fig. 1 and 2, respectively. As can be seen from fig. 1, the phosphoaluminous molecular sieve has a distinct CHA structure characteristic, being a cubic crystal structure; as can be seen from fig. 2, in the embodiment 1 of the present invention, the acoustical enhancement material of the phosphorus-aluminum molecular sieve is obtained by forming through a freeze-drying method, and is microsphere particles with good sphericity.
Test example 2
The test is to test the acoustic properties of sample 1# -sample 5# and reference sample 1# -reference sample 3# respectively, and specifically comprises:
taking 0.15g of each sample and each reference sample for respectively carrying out acoustic performance test, wherein the acoustic performance test is carried out by adopting a conventional method in the field, for example, the acoustic performance test can be carried out on each sample and each reference sample by referring to the method of measuring the electrical impedance shown in paragraph 0049-0054 in the Chinese patent application CN105049997A, specifically, each sample and each reference sample are respectively tested according to the method of measuring the electrical impedance, an electrical impedance spectrum is obtained, the curve in the electrical impedance spectrum corresponds to an electrical impedance curve, and the frequency corresponding to the highest point of the electrical impedance curve is F 0 When the loudspeaker is not loaded with each sample and each reference sample, the measured F0 is marked as F 0-cavity When each sample and each reference sample are loaded in the loudspeaker, the measured F0 is marked as F 0-sample or reference sample The calculation formula of Δf0 is:
ΔF0＝F 0-cavity -F 0-sample or reference sample 。
In this test example, the test environment: the target cavity was a 1cc speaker module with a relative humidity of 40% and a temperature of 25 ℃. The test results are shown in Table 1.
Ying 1
Note that: the experimental data in table 1 were obtained by 6 sets of acoustic performance test experiments, specifically, the six sets were: sample # 1, reference # 2 and reference # 3, sample # 2, reference # 1, reference # 2 and reference # 3, sample # 3, reference # 1, reference # 2 and reference # 3, sample # 4, reference # 1, reference # 2 and reference # 3, sample # 5, reference # 1, reference # 2 and reference # 3.
As can be seen from the above Table 1, compared with the ZSM-5 molecular sieve acoustical enhancement material, the acoustical performance of the phosphorus aluminum molecular sieve acoustical enhancement material provided by the embodiment of the invention is more excellent; for the phosphorus-aluminum molecular sieve acoustic enhancement material, when the phosphorus-aluminum molar ratio of the phosphorus-aluminum molecular sieve is not in the required range of the application, the acoustic performance of the phosphorus-aluminum molecular sieve acoustic enhancement material is inferior to that of the phosphorus-aluminum molecular sieve acoustic enhancement material provided by the embodiment of the invention; in addition, it can be seen from table 1 that when the mole ratio of phosphorus to aluminum of the phosphorus to aluminum molecular sieve used in the phosphorus to aluminum molecular sieve acoustical enhancement material is outside the range required in the present application, the acoustical properties are even inferior to those of the ZSM-5 molecular sieve acoustical enhancement material, and the root cause may be: the molar ratio of phosphorus to aluminum has a relatively important effect on the structure and water absorption properties of the phosphorus to aluminum molecular sieve, while for the acoustic enhancement material, the water absorption properties affect the acoustic properties of the base. Therefore, when the mole ratio of phosphorus to aluminum of the phosphorus to aluminum molecular sieve used in the phosphorus to aluminum molecular sieve acoustic enhancement material is not within the range required in the present application, the hydrophilicity of the phosphorus to aluminum molecular sieve is relatively strong, resulting in a significant decrease in the acoustic performance of the phosphorus to aluminum molecular sieve acoustic enhancement material.
In summary, the conventional sound absorbing material for speakers generally uses a silicon-aluminum molecular sieve or a titanium-silicon molecular sieve with an MFI structure, but the specific surface area of the silicon-aluminum molecular sieve with an MFI structure, i.e. the high silicon-aluminum molecular sieve, is smaller, generally only 300-400m 2 While the sound absorbing material has poorer acoustic performance, the phosphorus-aluminum molecular sieve acoustic reinforcing material provided by the embodiment of the invention comprises phosphorus-aluminum molecular sieve, wherein the specific surface area of the phosphorus-aluminum molecular sieve is large and is up to 600-900m 2 And/g, the absorption performance of sound is better when the sound absorbing material is used as the sound absorbing material.
The phosphorus-aluminum molecular sieve acoustic enhancement material provided by the embodiment of the invention comprises phosphorus-aluminum molecular sieves, wherein the skeleton elements of the phosphorus-aluminum molecular sieves consist of phosphorus, aluminum and oxygen, the molecular weight of the phosphorus is higher, after the phosphorus-aluminum molecular sieves are made into phosphorus-aluminum molecular sieve acoustic enhancement material particles, the bulk density is high, the sound absorption material filled in the rear cavity of a loudspeaker under the same volume has higher quality and better sound absorption performance.
The phosphorus-aluminum molecular sieve acoustic enhancement material provided by the embodiment of the invention comprises the phosphorus-aluminum molecular sieve, wherein the phosphorus-aluminum molecular sieve is neutral, and the problem of static electricity does not exist in the rear cavity of the loudspeaker.
The phosphorus-aluminum molecular sieve acoustic enhancement material provided by the embodiment of the invention is used as a sound absorption material to be filled in the rear cavity of the loudspeaker, so that the acoustic performance of the loudspeaker can be obviously enhanced.
The foregoing description of the embodiments of the invention is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention shall fall within the scope of the patent. In addition, the technical features and the technical features, the technical features and the technical invention can be freely combined for use.
Claims (15)
1. The phosphorus-aluminum molecular sieve acoustic reinforcing material is characterized in that the phosphorus-aluminum molecular sieve acoustic reinforcing material is prepared by uniformly mixing phosphorus-aluminum molecular sieve, binder, dispersing agent and other auxiliary agents and then molding; wherein, based on the total weight of the phosphorus-aluminum molecular sieve acoustic enhancement material being 100%, the content of the phosphorus-aluminum molecular sieve is not less than 70%, the dry basis content of the dispersing agent is 0-1%, and the dry basis content of the other auxiliary agents is 0-15%;
wherein the molar ratio of elements of phosphorus and aluminum in the phosphorus and aluminum molecular sieve is 0.3:1-1:1, and the specific surface area is 600-900m 2 /g。
2. The phosphoaluminous molecular sieve acoustic enhancement material of claim 1, wherein the framework structure of the phosphoaluminous molecular sieve comprises one or more of CHA, LTA, FAU, AFI, VFI, AET.
3. The phosphoaluminous molecular sieve acoustic reinforcement material of claim 1 or 2, wherein the framework elemental composition of the phosphoaluminous molecular sieve is phosphorus, aluminum and oxygen.
4. The phosphoaluminous molecular sieve acoustic reinforcement material according to claim 1 or 2, characterized in that the grain size of the phosphoaluminous molecular sieve is 20-500nm.
5. The phosphoaluminous molecular sieve acoustic reinforcement material of claim 1, wherein the binder is present in an amount of 1-15% based on 100% total weight of the phosphoaluminous molecular sieve acoustic reinforcement material, wherein the binder is present in an amount of solid components of the binder.
6. The phosphoaluminous molecular sieve acoustic reinforcement material of claim 1 or 5, wherein the binder comprises an inorganic binder and/or an organic binder;
wherein the inorganic binder comprises one or a mixture of more of silica sol, alumina sol, water glass and pseudo-boehmite; the organic binder comprises one or a mixture of a plurality of acrylic ester, epoxy and polyurethane organic binders.
7. The phosphoaluminous molecular sieve acoustic enhancement material of claim 1, wherein said dispersant comprises one or a mixture of several of glycerin, HPMA, liquid paraffin.
8. The phosphoaluminous molecular sieve acoustic enhancement material of claim 1, wherein said other adjuvants comprise one or a mixture of kaolin, diatomaceous earth, silica fume, bentonite, and montmorillonite.
9. The phosphoaluminous molecular sieve acoustic enhancement material of claim 1, wherein the shape of the phosphoaluminous molecular sieve acoustic enhancement material comprises microspheres, blocks, or flakes.
10. The phosphoaluminous molecular sieve acoustic enhancement material of claim 9, wherein said microspheres have a size of 100-400 μm.
11. A method for preparing an acoustic enhancement material of a phosphorus-aluminum molecular sieve according to any one of claims 1 to 10, characterized in that the preparation method comprises:
uniformly mixing a phosphorus-aluminum molecular sieve, a binder, a dispersing agent and other auxiliary agents to obtain a suspension, and then forming the suspension to obtain the phosphorus-aluminum molecular sieve acoustic enhancement material;
wherein, based on the total weight of the phosphorus-aluminum molecular sieve acoustic enhancement material being 100%, the content of the phosphorus-aluminum molecular sieve is not less than 70%, the dry basis content of the dispersing agent is 0-1%, and the dry basis content of the other auxiliary agents is 0-15%; the molar ratio of elements of phosphorus and aluminum in the phosphorus and aluminum molecular sieve is 0.3:1-1:1, and the specific surface area is 600-900m 2 /g。
12. The method of claim 11, wherein the shaping comprises spray drying or freeze shaping.
13. A loudspeaker comprising a housing, a sound emitting element and a rear cavity formed by the housing and the sound emitting element, wherein the phosphor-aluminum molecular sieve acoustic enhancement material of any one of claims 1-10 is assembled in the rear cavity.
14. An electronic device comprising the speaker of claim 13.
15. The electronic device of claim 14, wherein the electronic device comprises a smart phone, a TWS headset, a smart glasses, a smart watch, a VR device, an AR device, a tablet computer, or a lightweight notebook computer.
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