CN102547534A - Film electret, method for making film electret and sound playing device thereof - Google Patents
Film electret, method for making film electret and sound playing device thereof Download PDFInfo
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Abstract
The invention discloses a method for manufacturing a film electret, which comprises the following steps: providing a frame having a first surface and a second surface; attaching a dielectric film to a first surface of a frame, and coating a surface modification material on the other surface of the dielectric film opposite to the first surface of the frame to form a surface modification layer; adding nano-graphene powder into an aqueous solution to obtain a graphene aqueous solution, and oscillating the graphene aqueous solution to disperse nano-graphene particles to obtain a dispersed graphene aqueous solution; finally, the dispersed graphene aqueous solution is coated on the interface modification layer to form a nano graphene conductive layer, and the dielectric film is polarized to form a film electret.
Description
Technical field
The invention relates to a kind of film electret, film electret manufacture method and sound play device thereof; Particularly relevant for a kind of with the manufacture method of nano-graphene material, and with this film electret with graphene conductive layer sound play device as the mould that shakes as the film electret of conductive.
Background technology
The vision and the sense of hearing are the most direct two kinds of sensory responses of the mankind, and therefore for a long time, scientists does one's utmost to develop the related system of the various renewable visions and the sense of hearing.Simultaneously, Along with people's is for the requirement day by day of organoleptic quality, and 3C Product (Computer; Communication; Consumer Electronics) pursuing under short and small, the frivolous prerequisite, a kind of power saving, frivolous, can be according to the loud speaker (Loudspeakers) of ergonomics Demand Design, no matter be the large-sized dynamic planar loudspeakers of collocation; Also be small enough to earphone or stereosonic mobile phone, a large amount of development potentialities will be arranged in predictable future like walkman.
Electrostatic loudspeaker owing to possess lets the potentiality of 3C Product volume flattening, is main with the development electrostatic loudspeaker mainly in recent years therefore.Electrostatic loudspeaker is that two conductors that have the electric charge of the phase XOR same sex simultaneously can produce and push away or drafting ability (push or pull force) according to Coulomb's law.Alternation recommend the vibration that electrostatic force can cause tool electrostatic charge oscillating plate (diaphragm), and produce sound.One electrostatic loudspeaker generally comprises two porous, electrically conductive plates or battery lead plate and between between conductive plate or battery lead plate and by oscillating plate that it drove.Air gap (air gap) can separate electrode and oscillating plate so that the space of vibration plate vibrates to be provided.Oscillating plate is thin usually and light; And the transient state that makes electrostatic loudspeaker is reacted (transition response), the extensibility (expansion capability) in high frequency, sound fluency (smoothness of sound), acoustic fidelity (acoustic fidelity) and low distortion (distortion); Be superior to other forms of loud speaker, for example electronic (dynamic), moving-coil (movingcoil) formula or piezoelectricity (piezoelectric) formula loud speaker.In addition, oscillating plate must possess electrostatic charge, with when signal reaches battery lead plate, by under the effect of electric field that battery lead plate forms, allows to induce electrostatic force to drive oscillating plate.
Because simple in structure, electrostatic loudspeaker can be manufactured into multiple size to adapt to the needs for little and thin electronic installation that increase day by day.Yet general electrostatic loudspeaker selects for use a direct current that dc power converter (DC-DC converter) is constituted the electrostatic charge on the oscillating plate to provide by conductor.Consider size, cost and the electrical source consumption of direct current, developed electret material and replaced direct current dc power converter to dc power converter.Electret is one to have the dielectric material of permanent charge surely or dipole polarization.One electret produces inside and external electrical field, static equivalence that it can be a permanent magnetism, see also G.M.Sessler in 1980 at the 1st page of contained and No. the 4th, 288,584, United States Patent (USP) (Mishra) of Topics in Applied Physicsvol.33 chapter 1.The electret electric charge can comprise net charge (for example surface and/or space charge) and/or dipole polarization.Net charge comprises that seizure is just reaching the negative charge carrier layer; Yet as the mould that shakes, often be subject to the conductive characteristic of the conductive of electret with electret, let the sensitivity of shaking the relative change in electrical charge of mould and vibrating also be restricted; Therefore occur in recent years CNT is used to make electret; Conductivity is bad to cause problems such as sensitivity is low to improve, but uses CNT to make electret, then has expensive problem.
From 2004, the research team that the A.K.Geim of Univ Manchester UK professor is led obtains single-layer graphene with the mode of adhesive tape glass, confirmed the existence of single-layer graphene after, driven the correlation properties that scientist endeavours to study Graphene.Result of study shows that Graphene has many uncommon character.For example graphene film firm be prone to crisp, but can be tortuous, and Graphene (mono-layer graphite) presents almost transparent state, and have that very good electrical conductivity and conductive coefficient are up to 5300W/mK, ratio nano carbon pipe and diamond are good.Graphene electron mobility (electronmobility) at room temperature surpasses 15000cm
2/ Vs, ratio nano carbon pipe (about 10000cm
2/ Vs) height, silicon wafer (1400cm especially
2/ Vs) more than 10 times, and resistance is about 106 Ω/cm, and is lower than copper or silver metal, is at present in all known materials, at room temperature has a material of most low-resistance, and its conduction density 1,000,000 times of copper especially.
Because nano-graphene is unique and excellent characteristic electron, impels wide application prospect constantly to display.For example, can be applicable to the reddest at present current iphone contact panel, and because Graphene has the toughness than the strong hundreds of times of steel, make its not easy fracture and have fabulous elasticity.Therefore, Graphene can be made into also lighter than plastic cement, and the articles for use that intensity is but also strong than iron and steel to replace current material, are widely used in the making of flak jackets, automobile, aircraft, artificial satellite.
Because the molecular structure of Graphene is the favous ultra-thin planar structure of present situation, possesses ultra good conductivity and low-cost characteristic; Do not see the factor in the making that is applied to electret; If can grapheme material be applied in the making of electret of loud speaker; Not only can meet the requirement that need possess frivolous characteristic now for 3C Product; More can be by the conductivity of its superelevation, let electret as the shaking during mould of loud speaker, can possess better sensitivity to present more fine and smooth sound and to reduce other signals.
Summary of the invention
Because the problems referred to above of prior art, a purpose of the present invention are exactly a kind of film electret, film electret manufacture method being provided and using the sound play device of this film electret, with problems such as workout cost are too high and conductivity is bad, sensitivity is low.
According to the object of the invention, a kind of film electret is proposed, it comprises: a framework has one first and one second; One dielectric film, it is arranged on said first of said framework; One surfaction layer is arranged on another said first surface of the said relatively framework of said dielectric film, and is uniformly coated on the said dielectric film by a surface modified material and constitutes; And a nano-graphene conductive layer, it is arranged on the said surfaction layer, and this nano-graphene conductive layer is evenly disperseed by nano-graphene and is adsorbed on the said surfaction layer and constitutes, and how a rice nano-graphene is particle and is flaky texture for this.
According to the object of the invention, reintroduce a kind of manufacture method of film electret, comprise the following step: a framework is provided, and this framework has one first and one second; One dielectric film is attached on first of said framework; Evenly be coated with a surface modified material on another said first surface of the said relatively frame of said dielectric film, and form a surfaction layer; Add nano-graphene in an aqueous solution, obtain a graphene aqueous solution; Shake this graphene aqueous solution, disperseing said nano-graphene particle, and obtain disperseing the said graphene aqueous solution accomplished, wherein said nano-graphene particle is a flaky texture; Evenly the coating said graphene aqueous solution of disperseing to accomplish is on said adhesion coating and form a nano-graphene conductive layer, and said dielectric film carried out a polarization handle, to form a film electret.
According to the object of the invention, a kind of sound play device is proposed again, it comprises: an audio signal input unit, one first electrode, one second electrode and a film electret.The audio signal input unit has one first a signal source end and a secondary signal source end, and it is in order to receive an audio signal; The coupling of first electrode and the first signal source end, second electrode and the setting separated from one another of first electrode also are coupled with secondary signal source end; The setting of film electret and be coupling in first electrode and second electrode between, and and first electrode and second electrode between respectively keep a gap.Wherein, the film electret and first electrode and second electrode interact, to respond the audio signal that is provided by the first signal source end and secondary signal source end and to vibrate to produce sound.
In addition, the film electret of tut playing device also comprises: a framework has one first and one second; One dielectric film, it is arranged on said first of said framework; One surfaction layer is arranged on another said first surface of the said relatively framework of said dielectric film, and is uniformly coated on the said dielectric film by a surface modified material and constitutes; And a nano-graphene conductive layer, it is arranged on the said surfaction layer, and this nano-graphene conductive layer is evenly disperseed by nano-graphene and is adsorbed on the said surfaction layer and constitutes, and this nano-graphene is particle and is flaky texture.
In sum, a kind of film electret of the present invention, film electret manufacture method and sound play device thereof can have one or more following advantage:
(1) utilizes dispersing nanometer Graphene technology, can reduce numerous and diverse property of processing procedure in a large number, can reduce production time and cost with wet type formulations prepared from solutions film electret.
(2) utilize the nano graphene platelet of tool high-specific surface area characteristic to make the conductive layer of film electret; Can reduce the use amount of carbon material in a large number; And effectively reduce cost and the effective total quality that reduces that the carbon material consumes, and then meet now for the frivolous demand of 3C Product.
(3) utilize the nano graphene platelet of tool satisfactory electrical conductivity, good electrical transport factor and high-specific surface area characteristic to make the conductive layer of film electret; Help dielectric film effect in the electric charge; Let the film electret the time as the vibrating diaphragm of sound play device; For power-actuated oscillating movement better sensitivity is arranged, and it possesses sound playing frequency widely to impel sound play device.
(4) utilize nano graphene platelet almost to present transparent characteristic, can be applicable to make the clear films electret, and further be applied on the electronics 3C Product such as transparent loudspeaker, therefore having industry utilizes potentiality.
(5) utilize ion-type interfacial agent clad nano graphene platelet; Connect through the surfaction interlayer again and be adsorbed on the dielectric film; Can improve the character that is subject to dielectric film when in the past on dielectric film, forming conductive layer; And cause conductive layer and dielectric film to adhere to problem of unstable, and the nano-graphene conductive layer of a more stable and stronger can be provided.
Description of drawings
Fig. 1 is the decomposing schematic representation of film electret of the present invention.
Fig. 2 is the flow chart of the manufacture method of film electret of the present invention.
Fig. 3 is the generalized section of sound play device of the present invention.
Among the figure:
1, the film electret;
10, framework;
11, dielectric film;
12, the surfaction layer;
13, the nano-graphene conductive layer;
2, sound play device;
21, the audio signal input unit;
22, the first electrodes;
23, the second electrodes;
211, the first signal source ends;
212, secondary signal source end;
221,231, opening;
25,26, supporting member;
251,261, insulation component;
S11-S17, step.
Embodiment
Fig. 1 is the decomposing schematic representation of film electret of the present invention, and film electret 1 comprises framework 10, dielectric film 11, surfaction layer 12 and nano-graphene conductive layer 13.Framework 10 has one first and one second; Dielectric film 11 is arranged on first of framework 10; And surfaction layer 12 is arranged on dielectric film 11 another surface of first with respect to framework 10, and nano-graphene conductive layer 13 is evenly disperseed by nano-graphene and is adsorbed on the surfaction layer 12 and constitutes.Wherein, nano-graphene is particle and is flaky texture.
Fig. 2 is the flow chart of the manufacture method of film electret of the present invention.It comprises the following step.Step S11: a framework is provided, and framework has one first and one second.Step S12 a: dielectric film is attached on first of framework.Step S13: evenly be coated with a surface modified material on another surface of first of the relative framework of dielectric film, and form a surfaction layer.Step S14: add nano-graphene in an aqueous solution, obtain a graphene aqueous solution, wherein nano-graphene is particle and is flaky texture.Step S15: the concussion graphene aqueous solution with dispersing nanometer Graphene particle, and obtains disperseing the graphene aqueous solution accomplished.Step S16: evenly the coating graphene aqueous solution of disperseing to accomplish on adhesion coating and form a nano-graphene conductive layer, and step S17: dielectric film is carried out a polarization handle, to form a film electret.Details are as follows respectively for each step details:
Step S11 provides a framework 10, and the material of framework 10 can be better conductivity metal materials such as aluminium, and the shape of framework is unrestricted.Step S 12, a dielectric film 11 are attached on first of framework 10, can or seize fixedly dielectric film 11 and framework 10 such as instrument on both sides by the arms through fixture such as vacuum adhesive tape.The material of dielectric film 11 can be fluoropolymer, as polytetrafluoroethylene film (Polytetrafluoroethene, PTFE), gather difluoroethylene film Polyvinylidene Fluoride; PVDF; Or can be polyethylene film (polyethylene, PE), polypropylene film (polypropylene, PP), PEI film (polyetherimide; PEI) and polyethylene terephthalate film (Polyethylene terephthalate, non-fluoropolymer such as PET).
Step S13; Evenly coating one surface modified material is on another surface of first of dielectric film 11 relative frameworks 10; And form a surfaction layer 12; Surface modified material is in order to carry out surfaction to dielectric film 11, to let the surface nature of dielectric film 11 be fit to stable absorption nano-graphene conductive layer 13.Surface modified material can be water-based polyurethane (Polyurethane; PU) resin, polychlorostyrene diallyl Dimethyl Ammonium (poly (diallydimethylammonium chloride); PDDA) or gather 3; 4-ethene dioxythiophene-poly styrene sulfonate ((poly (3, (4-ethylenedioxythiophene-poly (styrenesulfonate), PEDOT:PSS).When on the dielectric film evenly behind the coating surface upgrading material, can film be toasted according to the crosslinking temperature of different surfaces upgrading material, its stoving time has difference according to different surfaces upgrading material, stoving time with unlikely crosslinked fully be principle.
Step S14, the powder that adds nano-graphene obtains a graphene aqueous solution in an aqueous solution.The aqueous solution is dissolved with an ion-type interfacial agent in advance, and this ion-type interface activating agent has a hydrophobic side and a water-wet side.When concussion in step S15 during graphene aqueous solution, the particle of the nano-graphene that separates because of concussion can further react with the ion-type interfacial agent.
The ion-type interfacial agent is the effect of hydrophobic property nano-graphene particle by its hydrophobic side and surface; With the surface of clad nano Graphene particle and expose its water-wet side, let produced a repulsive interaction through the water-wet side that exposes at the ion-type interfacial agent of particle surface to each other by the particle of the nano-graphene of its coating.This repulsive interaction can be avoided shaking the particle of the nano-graphite after the dispersion and assembles because of intermolecular force once again, with the particle of permanent this nano-graphene of dispersion, disperses the nano-graphite aqueous solution accomplished and obtain one.The indication nano-graphene is the molecule of planar structure, so it is a flaky texture, and the indication nano-graphene has high specific area, good electron mobility and good electrical conductivity.
Indication ion-type interfacial agent can be cation or anionic interfacial agent in addition, when it is teepol, then can be the teepol into carboxylic acid type, sulfonate type, sulfate type or phosphate type.
Step S16: evenly the coating graphene aqueous solution of disperseing to accomplish is on the surfaction layer and form a nano-graphene conductive layer, and this step will above-mentionedly disperse the nano-graphite aqueous solution of completion to be coated on the dielectric film behind the surfaction by the ion-type interfacial agent.The mode of coating nano-graphite aqueous solution can be the mode of rotary coating or spray coated.Wherein, the water-wet side that the nano graphene platelet system that is coated by the ion interface activating agent is gone out by surface exposure and the hydrophilic surface effect of surfaction layer, and reach the purpose that is adsorbed on dielectric film surface that nano graphene platelet is firm.
At last, step S17: dielectric film is carried out a polarization handle, to form a film electret, the mode that polarization is handled can be hot electret method, electric electret method, luminescence method or radiation method etc.
Fig. 3 is the generalized section of sound play device of the present invention, and sound play device 2 comprises: an audio signal input unit 21, one first electrode 22, one second electrode 23 and a film electret 1.Audio signal is imported Unit 21 and had one first a signal source end 211 and a secondary signal source end 212, and is shared to receive an audio signal; First electrode 22 is and the coupling of the first signal source end 211, and second electrode 23 and 22 settings separated from one another of first electrode also are coupled with secondary signal source end 212; Film electret 1 is provided with also and is coupling between first electrode 22 and second electrode 23, and and 22 first electrodes and second electrode 23 between respectively keep a gap.
Wherein, the film electret 1 and first electrode 22 and second electrode 23 interact, to respond the audio signal that is provided by the first signal source end 211 and secondary signal source end 212 and to vibrate to produce sound.Wherein, indication first electrode 22 and second electrode 23 can be the porous electrode plate, and have opening 221,231, and the sound wave that can provide the film electret 1 as vibrating diaphragm to be produced passes through.In addition, indication first electrode 22 and second electrode 23 can be formed by metal or the plastic material that is coated with conductive film.
And film electret 1 is arranged between first electrode 22 and second electrode 23, can keep first electrode 22 and second electrode 24 and film electret 1 in suitable place by supporting member 25,26, and can make supporting member 25,26 by insulating material.Can and open in 1 minute first electrode 22 and second electrode 23 by insulation component 251,261 as the film electret of vibrating diaphragm.
In addition, the film electret 1 of tut playing device 2 comprises: a framework 10 has one first and one second; One dielectric film 11 is arranged on first of framework 10; One surfaction layer 12 is arranged on another surface of first of dielectric film 11 relative frameworks 10, and is uniformly coated on the dielectric film 11 by a surface modified material and constitutes; And a nano-graphene conductive layer 13, it is arranged on the surfaction layer 12, and nano-graphene conductive layer 13 is evenly to be disperseed and be adsorbed on the surfaction layer and constitute by nano-graphene, and nano-graphene is particle and is flaky texture.
In an embodiment of the manufacture method of film electret of the present invention; With the aluminium frame is framework 10; (Polytetrafluoroethene is PTFE) as dielectric film 11, with water-based polyurethane (Polyurethane with polytetrafluoroethylene film; PU) resin is as the surface modified material of surfaction layer 12, with the ion interface activating agent of sodium lauryl sulfate as dispersing nanometer graphene platelet in the aqueous solution.
Among this embodiment; One aluminium frame is provided; And on the one side of aluminium frame, attach polytetrafluoroethylene film (Polytetrafluoroethene, PTFE), as the dielectric film that can stay electric charge; Wherein be that (Polytetrafluoroethene PTFE) is fixed on the aluminium frame with the tetrafluoroethene film with the vacuum adhesive tape.Get an amount of water-based polyurethane (Polyurethane, PU) resin, and with the water-based polyurethane (Polyurethane, PU) the even blade coating of resin is on above-mentioned tetrafluoroethene film (Polytetrafluoroethene, surface PTFE).After coating is accomplished; Be placed on the baking of carrying out in 90 ℃ of baking ovens 1 to 3 minute, wait to arrive when being scheduled to stoving time, take out from baking oven; Water-based polyurethane (the Polyurethane that form this moment; PU) (Polyurethane, PU) thickness of the formed surfaction layer of resin then is about the 1-10 micron to resin surface upgrading layer full solidification not yet, and water-based polyurethane.
When carrying out above-mentioned steps, preparation disperses the nano-graphite aqueous solution of completion.Among this embodiment, the nano-graphene of use has the electrically about 3000Wm of thermal conductance
-1K
-1And resistance coefficient 5x10
-5Ω cm.And in the process of the nano-graphite aqueous solution that the preparation dispersion is accomplished; At first preparing a concentration is the sodium lauryl sulfate aqueous solution of 2000ppm; After treating the sodium lauryl sulfate aqueous solution preparation completion of 2000ppm, the nano-graphene of getting weight 0.01g is added in the above-mentioned sodium lauryl sulfate aqueous solution of 20ml.Then, the sodium lauryl sulfate aqueous solution that will contain nano-graphene shakes the dispersion with the promotion nano-graphene in 30 to 45 minutes with ultrasonic waves, and is to avoid long-time concussion to cause stone mill aqueous solution temperature too high with the mode of ice bath in the process of earthquake.After vibration finished, promptly accomplishing purchases disperseed the nano-graphite aqueous solution of completion.In addition, the proportion of the percentage by weight between Graphene, interfacial agent and the water (wt%) can be Graphene: interfacial agent: water=1-5: 4-6: 100.
At last; Nano-graphite aqueous solution with above-mentioned dispersion completion; (Polyurethane is PU) on the formed surfaction layer of resin, to form the nano-graphene conductive layer at above-mentioned water-based polyurethane with the even spray coated of mode of spraying; And the making of the film electret of completion present embodiment, and the thickness of the nano-graphene conductive layer that made is accomplished is the 1-5 micron.
In this embodiment, employed lauryl sodium sulfate is an anion interface activating agent, and it can dissociate the anion of dodecyl sulphate root in the aqueous solution.In the process of graphene aqueous solution vibration; Its hydrophobic carbochain one end of dodecyl sulphate root can be the graphene platelet effect of hydrophobic property with the surface; Provide hydrophilic sulfuric acid butt and be coated on the graphene platelet surface and expose; Repel each other by electronegative sulfate ion between the graphene platelet, and the purpose of completion dispersing nanometer graphene platelet.
In an embodiment of sound play device of the present invention; With the film electret of the foregoing description as vibrating diaphragm; This film electret diaphragm structure comprises: framework, polytetrafluoroethylene dielectric film (Polytetrafluoroethene; PTFE), (Polyurethane, PU) resin is made the surface modified material of surperficial upgrading layer to the water-based polyurethane, reaches the nano graphene platelet conductive layer that disperses with the dodecyl sulphate root.Show that according to experimental result the embodiment of this sound play device has good electric effect, vibrating diaphragm sensitivity preferably, the sound playing frequency and can reduce excellent sound playing performance such as the assorted letter of tonequality widely of staying.
But above-mentioned embodiment is exemplary, is to be the restriction that this patent is comprised scope in order better to make those skilled in the art can understand this patent, can not to be interpreted as; So long as according to spirit that this patent discloses done anyly be equal to change or modify, all fall into the scope that this patent comprises.
Claims (15)
1. film electret is characterized in that: comprise:
One framework has one first and one second;
One dielectric film, it is arranged on first of said framework;
One surfaction layer is arranged on another surface of first of the said relatively framework of said dielectric film, and is uniformly coated on the said dielectric film by a surface modified material and constitutes; And
One nano-graphene conductive layer, it is arranged on the said surfaction layer, and this nano-graphene conductive layer is evenly to be disperseed and be adsorbed on the said surfaction layer and constitute by nano-graphene, and said nano-graphene is particle and is flaky texture.
2. film electret according to claim 1 is characterized in that: wherein said dielectric film comprises polytetrafluoroethylene film, gathers the difluoroethylene film, PVDF, polyethylene film, polypropylene film, PEI film or polyethylene terephthalate film.
3. film electret according to claim 1 is characterized in that: wherein said surface modified material comprises water-based polyurethane resin, polychlorostyrene diallyl Dimethyl Ammonium or gathers 3,4-ethene dioxythiophene-poly styrene sulfonate.
4. film electret according to claim 1 is characterized in that: the particle surface of wherein said nano-graphene is coated by an ion-type interfacial agent.
5. film electret according to claim 4; It is characterized in that: wherein said ion-type interfacial agent has a water-wet side and a hydrophobic side; And this hydrophobic side is adsorbed on said nano-graphene particle surface; And said water-wet side that exposes and said surface modified material effect, and be adsorbed on the said surfaction layer.
6. the manufacture method of a film electret, it is characterized in that: its step comprises:
One framework is provided, and this framework has one first and one second;
One dielectric film is attached on first of said framework;
Evenly be coated with a surface modified material on another surface of first of the said relatively framework of said dielectric film, and form a surfaction layer;
Add nano-graphene in an aqueous solution, obtain a graphene aqueous solution, wherein this nano-graphene is particle and flaky texture;
Shake said graphene aqueous solution, disperseing the particle of said nano-graphene, and obtain disperseing the graphene aqueous solution accomplished;
Evenly the coating said graphene aqueous solution of disperseing to accomplish is on said adhesion coating and form a nano-graphene conductive layer; And
Said dielectric film is carried out a polarization handle, to form a film electret.
7. the manufacture method of film electret according to claim 6; It is characterized in that: wherein said dielectric film comprises polytetrafluoroethylene film, gathers the difluoroethylene film, PVDF, polyethylene film, polypropylene film, PEI film or polyethylene terephthalate film.
8. the manufacture method of film electret according to claim 6 is characterized in that: wherein said surface modified material comprises water-based polyurethane resin, polychlorostyrene diallyl Dimethyl Ammonium or gathers 3,4-ethene dioxythiophene-poly styrene sulfonate.
9. the manufacture method of film electret according to claim 6 is characterized in that: the wherein said aqueous solution contains an ion-type interfacial agent.
10. the manufacture method of film electret according to claim 9; It is characterized in that: wherein said ion-type interfacial agent has a water-wet side and a hydrophobic side; And the step of said concussion graphene aqueous solution is adsorbed on the surface of said nano-graphene particle by said hydrophobic side, and exposes said water-wet side and accomplish and disperse said nano-graphene particle.
11. the manufacture method of film electret according to claim 10; It is characterized in that: said water-wet side and said surface modified material effect that wherein said nano-graphene particle is exposed by the said ion-type interfacial activity that is coated on its surface, and be adsorbed on the said surfaction layer.
12. a sound play device, it is characterized in that: it comprises:
One audio signal input unit, it has one first a signal source end and a secondary signal source end, and this audio signal input unit is in order to receive an audio signal;
One first electrode, itself and this first signal source end is coupled;
One second electrode, itself and the setting separated from one another of said first electrode, and be coupled with said secondary signal source end; And
One film electret, its setting also is coupling between said first electrode and second electrode, and respectively keep a gap between said first electrode and second electrode, and it comprises:
One framework has one first and one second;
One dielectric film, it is arranged on said first of said framework;
One surfaction layer is arranged on another said first surface of the said relatively framework of said dielectric film, and is uniformly coated on the said dielectric film by a surface modified material and constitutes; And
One nano-graphene conductive layer, it is arranged on the said surfaction layer, and this nano-graphene conductive layer is evenly disperseed by nano-graphene and is adsorbed on the said surfaction layer and constitutes, and this nano-graphene is particle and is flaky texture;
Wherein, said film electret and said first electrode and said second electrode interact, to respond the audio signal that is provided by said first signal source end and secondary signal source end and to vibrate to produce sound.
13. sound play device according to claim 12; It is characterized in that: wherein said dielectric film comprises polytetrafluoroethylene film, gathers the difluoroethylene film, PVDF, polyethylene film, polypropylene film, PEI film or polyethylene terephthalate film.
14. sound play device according to claim 12 is characterized in that: wherein said surface modified material comprises water-based polyurethane resin, polychlorostyrene diallyl Dimethyl Ammonium or gathers 3,4-ethene dioxythiophene-poly styrene sulfonate.
15. sound play device according to claim 12 is characterized in that: the particle surface of wherein said nano-graphene is coated by an ion-type interfacial agent.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW99146786A TW201228409A (en) | 2010-12-30 | 2010-12-30 | Thin film electret, manufacturing method of thin film electret and voice broadcasting apparatus thereof |
| TW099146786 | 2010-12-30 |
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| Publication Number | Publication Date |
|---|---|
| CN102547534A true CN102547534A (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100543019A Pending CN102547534A (en) | 2010-12-30 | 2011-03-03 | Film electret, method for making film electret and sound playing device thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102547534A (en) |
| TW (1) | TW201228409A (en) |
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| CN103929708A (en) * | 2014-04-25 | 2014-07-16 | 瑞声光电科技(常州)有限公司 | Preparation method of composite vibrating diaphragm |
| CN103929710A (en) * | 2014-04-25 | 2014-07-16 | 瑞声光电科技(常州)有限公司 | Preparation method of composite vibrating diaphragm |
| CN103929709A (en) * | 2014-04-25 | 2014-07-16 | 瑞声光电科技(常州)有限公司 | Preparation method of composite vibrating diaphragm |
| CN104555997A (en) * | 2013-10-29 | 2015-04-29 | 财团法人金属工业研究发展中心 | Graphene characteristic adjustment method |
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| WO2019010727A1 (en) * | 2017-07-10 | 2019-01-17 | 歌尔股份有限公司 | Sound production device, module and electronic apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105681989A (en) * | 2016-02-26 | 2016-06-15 | 无锡吉仓纳米材料科技有限公司 | Composite diaphragm electrostatic loudspeaker of ultrathin graphite film and carbon tube film |
| WO2018023843A1 (en) * | 2016-08-02 | 2018-02-08 | 常州阿木奇声学科技有限公司 | Vibration diaphragm and coating method thereof, and electroacoustic transducer |
| CN106412775A (en) * | 2016-09-27 | 2017-02-15 | 常州阿木奇声学科技有限公司 | Dome head for electrical acoustical transducer and electrical acoustical transducer |
| WO2019010727A1 (en) * | 2017-07-10 | 2019-01-17 | 歌尔股份有限公司 | Sound production device, module and electronic apparatus |
| CN109743671A (en) * | 2019-01-19 | 2019-05-10 | 深圳市国创珈伟石墨烯科技有限公司 | A kind of novel graphene combined type electrostatic diaphragm of loudspeaker and preparation method thereof |
| CN111225328A (en) * | 2020-01-22 | 2020-06-02 | 海菲曼（天津）科技有限公司 | Electrostatic loudspeaker diaphragm and electrostatic loudspeaker |
| CN111225328B (en) * | 2020-01-22 | 2021-01-29 | 头领科技（昆山）有限公司 | Electrostatic loudspeaker diaphragm and electrostatic loudspeaker |
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| TW201228409A (en) | 2012-07-01 |
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Application publication date: 20120704 |