Elastic material, preparation method thereof, loudspeaker and electronic equipment
By using elastic materials loaded with nanomaterials and molecular sieves in the speakers, the problems of small speaker space, poor heat dissipation and signal/magnetic field interference are solved, and better low-frequency sensitivity, heat dissipation effect and signal shielding are achieved.
Patent Information
- Application Number
- CN202411518269.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-02-11
AI Technical Summary
Due to the small space, poor heat dissipation and signal/magnetic field interference, existing speakers are difficult to solve the problems of reduced low frequency sensitivity, heating and signal interference.
Using an elastic material including a substrate, nanomaterial and molecular sieve, the specific surface area, electrical conductivity and thermal conductivity of the material are improved by loading nanomaterial and molecular sieve, thereby solving the small space of the speaker, poor heat dissipation and signal/magnetic field interference of the speaker. question.
This material can effectively absorb noise, improve vibration and noise reduction effect, and improve the shielding and signal output quality of electronic equipment through electrical conductivity and thermal conductivity, solving the problem of untimely heat dissipation.
Smart Images
Figure BDA0005108913850000141 
Figure BDA0005108913850000151
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of electronic acoustic materials, and in particular relates to an elastic material and a preparation method thereof, a loudspeaker, and an electronic device. Background Art
[0002] Electronic products such as mobile phones, tablets, and laptops are becoming increasingly thinner and lighter, so the integration of internal parts and the size of tiny parts are becoming more and more stringent, which will also bring about problems such as heat generation and mutual interference of magnetic fields.
[0003] Taking mobile phones as an example, the main problems include: (1) As mobile phones become thinner and lighter, the internal space is compressed, which means that the space behind the speaker becomes smaller, F0 increases, and low-frequency sensitivity decreases; (2) As the size of mobile phones becomes smaller, heat dissipation is not timely, which causes electronic products to overheat and shorten their lifespan; (3) As mobile phones become thinner and lighter, the internal space of mobile phones becomes smaller, various components are compactly distributed, and signals / magnetic fields are easily interfered.
[0004] In response to the above problems, the solutions currently provided by the market include: (1) To address the speaker space problem, special materials with zeolite powder as the base material are usually used to expand the capacity. The main feature of the porous structure of zeolite powder is to achieve the expansion effect. If the speaker space structure is relatively regular, sound-absorbing foam will be placed. (2) To address the heat dissipation problem, the current mobile phone heat dissipation methods mainly include: thermal conduction, thermal convection, liquid cooling, graphite heat dissipation and metal back panel heat dissipation. Among them, thermal conduction heat dissipation mainly uses thermal conductive materials to quickly transfer the heat from the heat source inside the mobile phone to the mobile phone shell. Thermal conductive materials usually include: graphite, metal plates, silicone grease, heat pipes, conductive foam, etc. (3) To address the signal / magnetic field interference problem: In order to improve the shielding and signal output quality of the mobile phone, conductive foam will be attached to the inside of the mobile phone.
[0005] Generally speaking, different materials or accessories are needed to solve different problems that arise with speakers, but this approach will further compress the internal space of the speaker.
[0006] Therefore, it is necessary to provide a new type of material that can simultaneously solve the problems of speaker reception, thermal conductivity and electrical conductivity. Summary of the invention
[0007] In view of the shortcomings of the prior art, the present invention aims to provide an elastic material and a preparation method thereof, a loudspeaker, and an electronic device. The elastic material can simultaneously solve the problems of small internal space, poor heat dissipation, and signal / magnetic field interference in the existing loudspeaker.
[0008] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:
[0009] In a first aspect, the present invention provides an elastic material, the elastic material comprising a supporting substrate, and nanomaterials and molecular sieves disposed inside pores of the supporting substrate;
[0010] The content of the load-bearing substrate in the elastic material is 97-99wt%, for example, 97wt%, 97.5wt%, 98wt%, 98.5wt% or 99wt%, but is not limited to the listed values, and other values not listed within the numerical range are also applicable;
[0011] The mass ratio of the nanomaterial to the molecular sieve is 1:0.9-1.1, for example, 1:0.9, 1:0.94, 1:0.98, 1:1, 1:1.02, 1:1.06 or 1:1.1, but is not limited to the listed values. Other values not listed within the numerical range are also applicable, preferably 1:1.
[0012] The elastic material provided by the present invention has a high specific surface area, can effectively absorb noise, dissipate sound energy, and improve its vibration reduction and noise reduction effect; in addition, by loading nanomaterials and molecular sieves, the specific surface area of the supporting substrate can be further increased, and while improving the sound absorption effect, the elastic material can also have electrical conductivity and thermal conductivity, so that one material can simultaneously solve the problems of small internal space, poor heat dissipation, and signal / magnetic field interference in existing speakers.
[0013] As a preferred technical solution of the present invention, the supporting substrate includes metal foam or sound-absorbing foam.
[0014] Preferably, the pore size of the metal foam is in the range of 0.05 to 5.5 mm, for example, 0.05 mm, 0.1 mm, 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm or 5.5 mm, but is not limited to the listed values, and other values not listed within the numerical range are also applicable.
[0015] Preferably, the porosity of the metal foam is 57-93%, for example, it can be 57%, 60%, 65%, 70%, 75%, 80%, 85%, 90% or 93%, but is not limited to the listed values, and other values not listed within the numerical range are also applicable.
[0016] Preferably, the pore size of the sound-absorbing foam is in the range of 0.05 to 5.5 mm, for example, 0.05 mm, 0.1 mm, 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm or 5.5 mm, but is not limited to the listed values, and other values not listed within the numerical range are also applicable.
[0017] Preferably, the porosity of the sound-absorbing foam is 57-93%, for example, it can be 57%, 60%, 65%, 70%, 75%, 80%, 85%, 90% or 93%, but is not limited to the listed values, and other values not listed within the numerical range are also applicable.
[0018] In the present invention, the metal foam or sound-absorbing foam as a load-bearing substrate needs to have excellent load-bearing capacity. If the pore size of the load-bearing substrate is too small, pore blocking will occur during the loading process, thereby affecting the performance of the resulting elastic material; if the pore size is too large, the content of the nanomaterial or molecular sieve loaded in the load-bearing substrate will be low, thereby affecting the performance of the resulting elastic material.
[0019] As a preferred technical solution of the present invention, the nanomaterial includes any one of nano-silver wire, nano-cobalt wire, nano-nickel wire, nano-copper wire, nano-iron wire, nano-gold wire, carbon nanotube or nano-ceramic fiber, or a combination of at least two of them. Typical but non-limiting combinations include: a combination of nano-silver wire and nano-copper wire, a combination of nano-cobalt wire, nano-nickel wire and nano-iron wire, a combination of nano-copper wire and nano-gold wire, or a combination of carbon nanotube and nano-ceramic fiber.
[0020] It is worth noting that the nanomaterials described in the present invention can not only increase the specific surface area of the bearing substrate by loading, thereby increasing the sound absorption effect, but also achieve electrical and thermal conductivity; among them, non-metallic carbon nanotubes and nano-ceramic fibers can also reduce the interference of antennas in electronic devices.
[0021] Preferably, the molecular sieve comprises pure silicon molecular sieve.
[0022] In a second aspect, the present invention provides a method for preparing the elastic material provided in the first aspect, the preparation method comprising the following steps:
[0023] (1) mixing nanomaterials, ethanol and pure water to obtain a nanomaterial solution;
[0024] (2) repeatedly performing the first loading treatment on the supporting substrate to obtain a semi-finished material;
[0025] The first loading treatment comprises: immersing the loading substrate in the nanomaterial solution obtained in step (1), taking it out and sequentially performing a standing treatment and a drying treatment;
[0026] (3) Repeating the second loading treatment on the semi-finished material obtained in step (2) to obtain the elastic material;
[0027] The second loading treatment comprises: soaking the semi-finished material obtained in step (2) in a molecular sieve aqueous solution, taking it out and performing a drying treatment.
[0028] In the present invention, the nanomaterial is loaded in the pores of the supporting substrate through the first loading treatment, thereby increasing the surface area of the porous structure in the elastic material and optimizing the sound absorption performance of the elastic material. Meanwhile, the high thermal conductivity and electrical conductivity of the nanomaterial itself also optimize the thermal conductivity and electrical conductivity of the elastic material and increase the thermal conductivity of the elastic material. Then, the molecular sieve is loaded in the pores of the supporting substrate through the second loading treatment, thereby optimizing the sound absorption and thermal conductivity of the elastic material.
[0029] The preparation method of the present invention has a simple process flow, takes a short time, and is conducive to industrial production.
[0030] As a preferred technical solution of the present invention, based on a mass fraction of 100%, the nanomaterial solution includes: 0.5-3wt% of nanomaterial, 60-85wt% of ethanol and 0-30wt% of pure water, and the mass fraction is not 0.
[0031] Exemplarily, the content of nanomaterial in the nanomaterial solution is 0.5-3wt%, for example, it can be 0.5wt%, 1wt%, 1.5wt%, 2wt%, 2.5wt% or 3wt%, but is not limited to the listed values, and other values not listed within the numerical range are also applicable.
[0032] The ethanol content in the nanomaterial solution is 60-85wt%, for example, it can be 60wt%, 65wt%, 70wt%, 75wt%, 80wt% or 85wt%, but is not limited to the listed values, and other values not listed within the numerical range are also applicable.
[0033] The content of pure water in the nanomaterial solution is 0-30wt%, for example, it can be 2wt%, 5wt%, 10wt%, 15wt%, 20wt%, 25wt% or 30wt%, but is not limited to the listed values, and other values not listed within the numerical range are also applicable.
[0034] Preferably, the diameter of the nanomaterial is 10 to 80 nm, for example, 10 nm, 20 nm, 30 nm, 40 nm, 50 nm, 60 nm, 70 nm or 80 nm, but is not limited to the listed values, and other values not listed within the numerical range are also applicable.
[0035] In the present invention, the diameter of the nanomaterial is 10 to 80 nm. If the diameter of the nanomaterial is too small, the content of the nanomaterial loaded in the pores of the supporting substrate will be too small, thereby affecting the performance of the elastic material. If the diameter of the nanomaterial is too large, pore blocking will occur during the loading process.
[0036] As a preferred technical solution of the present invention, the number of repetitions in step (2) is 2 to 3 times, for example, 2 times or 3 times.
[0037] Preferably, the soaking time in step (2) is 5 to 6 minutes, for example, 5 minutes, 5.2 minutes, 5.4 minutes, 5.6 minutes, 5.8 minutes or 6 minutes, but is not limited to the listed values, and other values not listed within the numerical range are also applicable.
[0038] Preferably, the standing treatment time in step (2) is 30 to 40 seconds, for example, 30 seconds, 32 seconds, 34 seconds, 36 seconds, 38 seconds or 40 seconds, but is not limited to the listed values, and other values not listed within the numerical range are also applicable.
[0039] It is worth noting that the platform used for the static treatment in step (2) of the present invention is a sieve.
[0040] Preferably, the temperature of the drying treatment in step (2) is 97-103°C, for example, it can be 97°C, 98°C, 99°C, 100°C, 101°C, 102°C or 103°C, but is not limited to the listed values, and other values not listed within the numerical range are also applicable.
[0041] Preferably, the drying time in step (2) is 9 to 11 minutes, for example, 9 minutes, 9.4 minutes, 9.8 minutes, 10.2 minutes, 10.6 minutes or 11 minutes, but is not limited to the listed values, and other values not listed within the numerical range are also applicable.
[0042] It is worth noting that the present invention controls the number of repetitions of the first load treatment in step (2), the standing time, and the concentration of the nanomaterial in the nanomaterial solution in step (1), so that a sufficient amount of nanomaterial can be adsorbed in the pores of the supporting substrate without causing pore clogging.
[0043] As a preferred technical solution of the present invention, the number of repetitions in step (3) is 2 to 4 times, for example, 2 times, 3 times or 4 times.
[0044] Preferably, the molecular sieve aqueous solution in step (3) comprises pure silicon molecular sieve and water.
[0045] Preferably, the mass ratio of the pure silicon molecular sieve to water is 1:8-10, for example, 1:8, 1:8.4, 1:8.8, 1:9.2, 1:9.6 or 1:10, but is not limited to the listed values, and other values not listed within the numerical range are also applicable.
[0046] Preferably, the particle size of the pure silicon molecular sieve is in the range of 200 to 500 nm, for example, 200 nm, 250 nm, 300 nm, 350 nm, 400 nm, 450 nm or 500 nm, but is not limited to the listed values, and other values not listed within the numerical range are also applicable.
[0047] As a preferred technical solution of the present invention, the soaking time in step (3) is 5 to 6 minutes, for example, it can be 5 minutes, 5.2 minutes, 5.4 minutes, 5.6 minutes, 5.8 minutes or 6 minutes, but is not limited to the listed values, and other values not listed within the numerical range are also applicable.
[0048] Preferably, the first immersion in the second loading treatment in step (3) is accompanied by ultrasonic vibration.
[0049] Preferably, the ultrasonic vibration time is 2 to 3 minutes, for example, 2 minutes, 2.2 minutes, 2.4 minutes, 2.6 minutes, 2.8 minutes or 3 minutes, but is not limited to the listed values, and other values not listed within the numerical range are also applicable.
[0050] It is worth noting that in the second load treatment in step (3) of the present invention, only the first immersion process is accompanied by ultrasonic vibration, the purpose of which is to accelerate the liquid flow of the molecular sieve aqueous solution and accelerate the bonding of the molecular sieve with the supporting substrate.
[0051] Preferably, the temperature of the drying treatment in step (3) is 97-103°C, for example, it can be 97°C, 98°C, 99°C, 100°C, 101°C, 102°C or 103°C, but is not limited to the listed values, and other values not listed within the numerical range are also applicable.
[0052] Preferably, the drying time in step (3) is 9 to 11 minutes, for example, 9 minutes, 9.4 minutes, 9.8 minutes, 10.2 minutes, 10.6 minutes or 11 minutes, but is not limited to the listed values, and other values not listed within the numerical range are also applicable.
[0053] As a preferred technical solution of the present invention, the method for preparing the elastic material provided in the second aspect of the present invention comprises the following steps:
[0054] (1) mixing nanomaterials, ethanol and pure water to obtain a nanomaterial solution;
[0055] The nano material solution comprises, based on a mass fraction of 100%, 0.5 to 3 wt% of nano material, 60 to 85 wt% of ethanol and 0 to 30 wt% of pure water; the diameter of the nano material is 10 to 80 nm;
[0056] (2) Repeating the first loading treatment on the supporting substrate 2 to 3 times to obtain a semi-finished material;
[0057] The first loading treatment comprises: immersing the supporting substrate in the nanomaterial solution obtained in step (1), taking it out after 5 to 6 minutes, placing it on a sieve for 30 to 40 seconds, and then drying it at 97 to 103° C. for 9 to 11 minutes;
[0058] (3) Repeating the second loading treatment 2 to 4 times on the semi-finished material obtained in step (2) to obtain the elastic material;
[0059] The second loading treatment comprises: soaking the semi-finished material obtained in step (2) in a molecular sieve aqueous solution, taking it out after 5 to 6 minutes, and drying it at 97 to 103° C. for 9 to 11 minutes;
[0060] Wherein, the first immersion in the second load treatment is accompanied by ultrasonic vibration, and the duration of the ultrasonic vibration is 2 to 3 minutes.
[0061] In a third aspect, the present invention provides a loudspeaker, wherein the elastic material provided in the first aspect is installed in the rear cavity of the loudspeaker.
[0062] In a fourth aspect, the present invention provides an electronic device, wherein the elastic material provided in the first aspect is installed in a rear cavity of a speaker of the electronic device.
[0063] The electronic device includes any one of a smart phone, a TWS headset, a head-mounted headset, smart glasses, a smart watch, a VR device, an AR device, a tablet computer or a laptop computer.
[0064] The numerical range described in the present invention not only includes the point values listed above, but also includes any point values between the above numerical ranges that are not listed. Due to space limitations and for the sake of simplicity, the present invention no longer exhaustively lists the specific point values included in the range.
[0065] Compared with the prior art, the present invention has the following beneficial effects:
[0066] (1) The elastic material provided by the present invention has a large specific surface area, can effectively absorb noise, dissipate sound energy, and improve its vibration reduction and noise reduction effect;
[0067] (2) The present invention improves the conductivity of the elastic material by loading the nanomaterial in the pores of the supporting substrate, thereby improving the shielding property and signal output quality of the electronic device;
[0068] (3) The present invention provides a molecular sieve loaded in the pores of the supporting substrate, thereby improving the thermal conductivity of the elastic material and solving the problem of reduced service life of electronic equipment due to untimely heat dissipation;
[0069] (4) The preparation method provided by the present invention has a simple process flow, short time consumption, low cost, and is conducive to industrial production. DETAILED DESCRIPTION
[0070] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only used to help understand the present invention and should not be regarded as specific limitations of the present invention.
[0071] Example 1
[0072] This embodiment provides an elastic material, which includes a supporting substrate, and nanomaterials and molecular sieves disposed inside pores of the supporting substrate;
[0073] The content of the load-bearing substrate in the elastic material is 98wt%;
[0074] The mass ratio of the nano material to the molecular sieve is 1:1.
[0075] The method for preparing the elastic material of this embodiment comprises the following steps:
[0076] (1) mixing nanomaterials, ethanol and pure water to obtain a nanomaterial solution;
[0077] The nano material solution comprises, based on a mass fraction of 100%, 1wt% of nano silver wire, 75wt% of ethanol and 24wt% of pure water; the diameter of the nano material is 45nm;
[0078] (2) Repeating the first loading treatment twice on a metal foam having a pore size range of 4.5 to 5.5 mm and a porosity of 85% to obtain a semi-finished material;
[0079] The first loading treatment comprises: immersing the loading substrate in the nanomaterial solution obtained in step (1), taking it out after 5 minutes, placing it on a sieve for 30 seconds, and then drying it at 100° C. for 10 minutes;
[0080] (3) Repeating the second loading treatment on the semi-finished material obtained in step (2) for 4 times to obtain the elastic material;
[0081] The second loading treatment comprises: soaking the semi-finished material obtained in step (2) in a molecular sieve aqueous solution, taking it out after 5 minutes, and drying it at 100° C. for 10 minutes;
[0082] Wherein, the first immersion in the second load treatment is accompanied by ultrasonic vibration, and the duration of the ultrasonic vibration is 3 minutes.
[0083] Example 2
[0084] This embodiment provides an elastic material, which includes a supporting substrate, and nanomaterials and molecular sieves disposed inside pores of the supporting substrate;
[0085] The content of the load-bearing substrate in the elastic material is 97wt%;
[0086] The mass ratio of the nano material to the molecular sieve is 1:0.9.
[0087] The method for preparing the elastic material of this embodiment comprises the following steps:
[0088] (1) mixing nanomaterials, ethanol and pure water to obtain a nanomaterial solution;
[0089] The nano material solution comprises, based on a mass fraction of 100%, 0.5 wt% of nano copper wire, 85 wt% of ethanol and 14.5 wt% of pure water; the diameter of the nano material is 10 nm;
[0090] (2) Repeating the first loading treatment on the supporting substrate twice to obtain a semi-finished material;
[0091] The first loading treatment comprises: immersing the supporting substrate in the nanomaterial solution obtained in step (1), taking it out after 6 minutes, placing it on a sieve for 35 seconds, and then drying it at 97° C. for 11 minutes;
[0092] (3) Repeating the second loading treatment twice on the semi-finished material obtained in step (2) to obtain the elastic material;
[0093] The second loading treatment comprises: soaking the semi-finished material obtained in step (2) in a molecular sieve aqueous solution, taking it out after 6 minutes, and drying it at 97° C. for 11 minutes;
[0094] Wherein, the first immersion in the second load treatment is accompanied by ultrasonic vibration, and the duration of the ultrasonic vibration is 2 minutes.
[0095] Example 3
[0096] This embodiment provides an elastic material, which includes a supporting substrate, and nanomaterials and molecular sieves disposed inside pores of the supporting substrate;
[0097] The content of the load-bearing substrate in the elastic material is 99wt%;
[0098] The mass ratio of the nano material to the molecular sieve is 1:1.1.
[0099] The method for preparing the elastic material of this embodiment comprises the following steps:
[0100] (1) mixing nanomaterials, ethanol and pure water to obtain a nanomaterial solution;
[0101] The nano material solution comprises, based on a mass fraction of 100%, 3wt% carbon nanotubes, 67wt% ethanol and 30wt% pure water; the diameter of the nano material is 80nm;
[0102] (2) Repeating the first loading treatment on the supporting substrate twice to obtain a semi-finished material;
[0103] The first loading treatment comprises: immersing the loading substrate in the nanomaterial solution obtained in step (1), taking it out after 5.5 minutes, placing it on a sieve for 40 seconds, and then drying it at 103° C. for 9 minutes;
[0104] (3) Repeating the second loading treatment three times on the semi-finished material obtained in step (2) to obtain the elastic material;
[0105] The second loading treatment comprises: soaking the semi-finished material obtained in step (2) in a molecular sieve aqueous solution, taking it out after 5.5 minutes, and drying it at 103° C. for 9 minutes;
[0106] The first immersion in the second load treatment is accompanied by ultrasonic vibration, and the duration of the ultrasonic vibration is 2.5 minutes.
[0107] Example 4
[0108] This embodiment provides an elastic material, which includes a supporting substrate, and nanomaterials and molecular sieves disposed inside pores of the supporting substrate;
[0109] The content of the load-bearing substrate in the elastic material is 98wt%;
[0110] The mass ratio of the nano material to the molecular sieve is 1:1.
[0111] The preparation method of the elastic material described in this embodiment is different from that in Embodiment 1 only in that:
[0112] In this embodiment, the content of the nano silver wires in the nano material solution in step (1) is adjusted to 4.5 wt %.
[0113] Example 5
[0114] This embodiment provides an elastic material, which includes a supporting substrate, and nanomaterials and molecular sieves disposed inside pores of the supporting substrate;
[0115] The content of the load-bearing substrate in the elastic material is 98wt%;
[0116] The mass ratio of the nano material to the molecular sieve is 1:1.
[0117] The preparation method of the elastic material described in this embodiment is different from that in Embodiment 1 only in that:
[0118] In this embodiment, the static treatment time in step (2) is adjusted to 50 seconds.
[0119] Example 6
[0120] This embodiment provides an elastic material, which includes a supporting substrate, and nanomaterials and molecular sieves disposed inside pores of the supporting substrate;
[0121] The content of the load-bearing substrate in the elastic material is 98wt%;
[0122] The mass ratio of the nano material to the molecular sieve is 1:1.
[0123] The preparation method of the elastic material described in this embodiment is different from that in Embodiment 1 only in that:
[0124] In this embodiment, the static treatment time in step (2) is adjusted to 20 seconds.
[0125] Example 7
[0126] This embodiment provides an elastic material, which includes a supporting substrate, and nanomaterials and molecular sieves disposed inside pores of the supporting substrate;
[0127] The content of the load-bearing substrate in the elastic material is 98wt%;
[0128] The mass ratio of the nano material to the molecular sieve is 1:1.
[0129] The preparation method of the elastic material described in this embodiment is different from that in Embodiment 1 only in that:
[0130] In this embodiment, the number of times the first load is processed in step (2) is adjusted to 1 time.
[0131] Example 8
[0132] This embodiment provides an elastic material, which includes a supporting substrate, and nanomaterials and molecular sieves disposed inside pores of the supporting substrate;
[0133] The content of the load-bearing substrate in the elastic material is 98wt%;
[0134] The mass ratio of the nano material to the molecular sieve is 1:1.
[0135] The preparation method of the elastic material described in this embodiment is different from that in Embodiment 1 only in that:
[0136] In this embodiment, the number of times the first load is processed in step (2) is adjusted to 4 times.
[0137] Example 9
[0138] This embodiment provides an elastic material, which includes a supporting substrate, and nanomaterials and molecular sieves disposed inside pores of the supporting substrate;
[0139] The content of the load-bearing substrate in the elastic material is 98wt%;
[0140] The mass ratio of the nano material to the molecular sieve is 1:1.
[0141] The preparation method of the elastic material described in this embodiment is different from that in Embodiment 1 only in that:
[0142] This embodiment adds after step (3): repeating the first load processing in step (1) twice.
[0143] Example 10
[0144] This embodiment provides an elastic material, which includes a supporting substrate, and nanomaterials and molecular sieves disposed inside pores of the supporting substrate;
[0145] The content of the load-bearing substrate in the elastic material is 98wt%;
[0146] The mass ratio of the nano material to the molecular sieve is 1:1.
[0147] The preparation method of the elastic material described in this embodiment is different from that in Embodiment 1 only in that:
[0148] In this embodiment, the number of times the second load is processed in step (3) is adjusted to 1 time.
[0149] Embodiment 11
[0150] This embodiment provides an elastic material, which includes a supporting substrate, and nanomaterials and molecular sieves disposed inside pores of the supporting substrate;
[0151] The content of the load-bearing substrate in the elastic material is 98wt%;
[0152] The mass ratio of the nano material to the molecular sieve is 1:1.
[0153] The preparation method of the elastic material described in this embodiment is different from that in Embodiment 1 only in that:
[0154] In this embodiment, the number of times the second load is processed in step (3) is adjusted to 5 times.
[0155] Example 12
[0156] This embodiment provides an elastic material, which includes a supporting substrate, and nanomaterials and molecular sieves disposed inside pores of the supporting substrate;
[0157] The content of the load-bearing substrate in the elastic material is 98wt%;
[0158] The mass ratio of the nano material to the molecular sieve is 1:1.
[0159] The preparation method of the elastic material described in this embodiment is different from that in Embodiment 1 only in that:
[0160] In this embodiment, the operation order of step (2) and step (3) is switched, that is, the molecular sieve is first loaded inside the pores of the supporting substrate, and then the nanomaterial is loaded.
[0161] Comparative Example 1
[0162] This comparative example provides an elastic material, which differs from Example 1 only in that:
[0163] This comparative example omits the nanomaterial loaded inside the pores of the supporting substrate.
[0164] The preparation method of the elastic material described in this comparative example is different from that in Example 1 only in that:
[0165] In this comparative example, step (2) was omitted.
[0166] Comparative Example 2
[0167] This comparative example provides an elastic material, which differs from Example 1 only in that:
[0168] In this comparative example, the molecular sieve loaded inside the pores of the supporting substrate is omitted.
[0169] The preparation method of the elastic material described in this comparative example is different from that in Example 1 only in that:
[0170] In this comparative example, step (3) was omitted.
[0171] The specific surface area of the elastic materials provided in some of the above embodiments and comparative examples was tested, and the results are shown in Table 1.
[0172] Table 1
[0173]
[0174]
[0175] According to Table 1, we can know the following points:
[0176] (1) Comprehensive analysis of Examples 1-3 shows that the elastic material provided by the present invention has a high specific surface area, can effectively absorb noise, dissipate sound energy, and improve its vibration reduction and noise reduction effect;
[0177] In addition, the elastic materials provided in Examples 1-3 have excellent electrical conductivity and thermal conductivity, which improve the shielding property and signal output quality of electronic equipment, and solve the problem of shortening the service life of electronic equipment due to untimely heat dissipation;
[0178] (2) Comprehensive analysis of Example 1 and Examples 4-6 shows that the content of nanosilver wires in the nanomaterial solution in the first loading treatment in step (2) and the time of the static treatment will affect the loading amount of the nanomaterial, thereby affecting the performance of the elastic material;
[0179] When the content of nano silver wires in the nano material solution is too high, or the static treatment time is too long, pore blocking will occur, which will not only reduce the specific surface area of the elastic material, but also affect the thermal conductivity and electrical conductivity of the elastic material;
[0180] When the static treatment time is too short, the loading amount of the nano silver wires will be too low, thereby affecting the thermal conductivity and electrical conductivity of the elastic material;
[0181] (3) Comprehensive analysis of Example 1 and Examples 7-9 shows that the number of times of the first loading treatment in step (2) will affect the loading amount of the nanomaterial, thereby affecting the performance of the elastic material;
[0182] When the number of times the first load treatment is performed is too small, the loading amount of the nanosilver wire will be too low, thereby affecting the thermal conductivity and electrical conductivity of the elastic material; when the number of times the first load treatment is performed is too large, pore blocking will occur, which will not only reduce the specific surface area of the elastic material, but also affect the thermal conductivity and electrical conductivity of the elastic material;
[0183] When the first load treatment process is added after the second load treatment, the specific surface area of the obtained elastic material not only does not increase, but also tends to decrease, thereby affecting the sound absorption effect of the elastic material;
[0184] (4) Comprehensive analysis of Example 1 and Examples 10-11 shows that the number of times of the second loading treatment in step (3) will affect the loading amount of the molecular sieve, thereby affecting the performance of the elastic material;
[0185] When the number of times the second load treatment is performed is too small, the load of the analysis sieve will be too low, thereby affecting the optimization of the sound absorption and thermal conductivity of the elastic material. When the number of times the second load treatment is performed is too large, pore blocking is likely to occur.
[0186] (5) Comprehensive analysis of Example 1 and Example 12 shows that if the molecular sieve with a larger diameter is loaded first and then the nanomaterial is loaded, it will affect the loading ratio of the molecular sieve and the nanomaterial in the obtained elastic material, and even significantly reduce the loading amount of the nanomaterial, thereby affecting the optimization of the conductivity of the elastic material;
[0187] (6) Comprehensive analysis of Example 1 and Comparative Examples 1-2 shows that only by including both nanomaterials and molecular sieves can the problems of small internal space, poor heat dissipation, and signal / magnetic field interference be solved simultaneously;
[0188] When the molecular sieve loading is omitted, the specific surface area of the obtained elastic material is greatly reduced, which affects the performance of the obtained elastic material.
[0189] In summary, the elastic material described in the present invention has a large specific surface area, can effectively absorb noise, dissipate sound energy, and improve its vibration reduction and noise reduction effect; and through the loading of nanomaterials and molecular sieves, the shielding and signal output quality of electronic equipment are improved, solving the problem of reduced service life caused by untimely heat dissipation of electronic equipment.
[0190] The applicant declares that the specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An elastic material, characterized in that: The elastic material includes a supporting substrate, and nanomaterials and molecular sieves disposed inside the pores of the supporting substrate; The content of the load-bearing substrate in the elastic material is 97-99wt%; The mass ratio of the nano material to the molecular sieve is 1:0.9-1.
1.
2. The elastic material according to claim 1, characterized in that The load-bearing substrate includes metal foam or sound-absorbing foam; The pore size of the metal foam is in the range of 0.05 to 5.5 mm; The porosity of the metal foam is 57-93%; The pore size of the sound-absorbing foam is in the range of 0.05 to 5.5 mm; The porosity of the sound-absorbing foam is 57-93%.
3. The elastic material according to claim 1 or 2, characterized in that: The nanomaterial includes any one of nano silver wire, nano cobalt wire, nano nickel wire, nano copper wire, nano iron wire, nano gold wire, carbon nano tube or nano ceramic fiber, or a combination of at least two thereof; The molecular sieve comprises a pure silicon molecular sieve.
4. A method for preparing the elastic material according to any one of claims 1 to 3, characterized in that: The preparation method comprises the following steps: (1) mixing nanomaterials, ethanol and pure water to obtain a nanomaterial solution; (2) repeatedly performing the first loading treatment on the supporting substrate to obtain a semi-finished material; The first loading treatment comprises: immersing the loading substrate in the nanomaterial solution obtained in step (1), taking it out and sequentially performing a standing treatment and a drying treatment; (3) Repeating the second loading treatment on the semi-finished material obtained in step (2) to obtain the elastic material; The second loading treatment comprises: soaking the semi-finished material obtained in step (2) in a molecular sieve aqueous solution, taking it out and performing a drying treatment.
5. The preparation method according to claim 4, characterized in that: The nano material solution comprises, based on a mass fraction of 100%, 0.5 to 3 wt% of nano material, 60 to 85 wt% of ethanol and 0 to 30 wt% of pure water; The diameter of the nano material is 10-80 nm.
6. The preparation method according to claim 4 or 5, characterized in that: The number of repetitions in step (2) is 2 to 3 times; The soaking time in step (2) is 5 to 6 minutes; The standing time of step (2) is 30 to 40 seconds; The temperature of the drying process in step (2) is 97-103° C. The drying time in step (2) is 9 to 11 minutes.
7. The preparation method according to claim 4, characterized in that: The number of repetitions in step (3) is 2 to 4 times; The molecular sieve aqueous solution in step (3) comprises pure silicon molecular sieve and water; The mass ratio of the pure silicon molecular sieve to water is 1:8-10; The particle size of the pure silicon molecular sieve ranges from 200 to 500 nm.
8. The preparation method according to claim 4, characterized in that: The soaking time in step (3) is 5 to 6 minutes; Step (3) the first immersion in the second load treatment is accompanied by ultrasonic vibration; The ultrasonic vibration time is 2 to 3 minutes; The drying temperature in step (3) is 97-103°C; The drying time in step (3) is 9 to 11 minutes.
9. A loudspeaker, characterized in that: The loudspeaker rear cavity is equipped with the elastic material as described in any one of claims 1-3.
10. An electronic device, characterized in that: The rear cavity of the speaker of the electronic device is equipped with the elastic material according to any one of claims 1 to 3; The electronic device includes any one of a smart phone, a TWS headset, a head-mounted headset, smart glasses, a smart watch, a VR device, an AR device, a tablet computer or a laptop computer.