CN104399378A - Method for dispersing conductive powder and monomers - Google Patents
Method for dispersing conductive powder and monomers Download PDFInfo
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- CN104399378A CN104399378A CN201410629812.2A CN201410629812A CN104399378A CN 104399378 A CN104399378 A CN 104399378A CN 201410629812 A CN201410629812 A CN 201410629812A CN 104399378 A CN104399378 A CN 104399378A
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Abstract
The invention discloses a method for dispersing conductive powder and monomers. The method is characterized in comprising the following steps: feeding a first dispersoid and making the first dispersoid go through a first nozzle by a first pressure; feeding a second dispersoid and making the second dispersoid go through a second nozzle by a second pressure; wherein the first pressure is larger than the second pressure, mixing the two monomers, and introducing the two monomers into a mixing chamber; wherein during the mixing process, the second pressure is controlled in a pressure range of 100 to 2000 Pa, the first dispersoid, which flows in the axial direction, drives the second dispersoid and is mixed with the second dispersoid, thus the turbulent kinetic energy in the mixing room is prominently increased, and the inertia force of the turbulence can make the monomer particles be dispersed or de-agglomerated in the turbulence. The provided method has a prominent social and economic profit.
Description
Technical field
The present invention relates to the process for dispersing of a kind of conductive powder and monomer.
Background technology
In order to reach above-mentioned needs, by using mixer or mixer to stir metal dust and the carrier containing solvent, binder and other composition and the step using the metal powder in the dispersible carriers such as three-roller type grinder, typically produce conduction coating materials.The grinding of various material all requires special installation as a rule.Such as, salient point prepared by the ceramic nanoparticle in stirring ball mill is that the height on abrasive media weares and teares and relevant contamination of products, high-energy input and long grinding time.
But, when metal dust has sub-micro grade or less particle size, or when metal dust tightly flocks together, make the metal dust of polymerization be dispersed to sufficient degree by said method thus powder completely in dispersible carrier is more difficult.Thus, have use is formed in the electronic component of electrode by this conductive compounds, be difficult to obtain be satisfied with characteristic.In another approach, carried out the metal dust in dispersible carrier by the equipment utilizing the grinding machine (such as ball mill or sand mill) using medium to substitute three-roller type grinder and so on, produce conduction coating materials.
Particle is allegedly more effectively crushed in lower nanometer range by the novel grinding machine model being referred to as high-performance grinding machine.This realizes (S.Breitung by the more high power density in grinding chamber and the possibility using very little abrasive media, Produktgestaltung in der Partikeltechnologie (product design in particle technique), 3rd volume, Frauenhofer IRB Verlag).Except the economy of the poor efficiency of these grinding technics and contamination of products, also there is the problem of grain stabilised aspect.This can such as be solved by interpolation nitric acid or formic acid.Good pressure distribution method makes to input very high local power density in dispersion, therefore more effectively pulverizes agglomerate combination.But the abrasion of inorganic particulate system is very high, this causes the very high wearing and tearing of sapphire used or diamond nozzle.This problem causes very high cost and significantly shortens the service life of this kind of device.Good pressure distribution method is very concerned for industry due to higher-energy efficiency (compared with rotor-stator system 100-300 doubly), but due to short service life of nozzle, uneconomical at present, mainly for particle system.
But when by said method divided metallic powder, metal dust and medium collide, form oblate spheroid sprills.When by the internal electrode of the conduction coating materials containing oblate spheroid sprills for the formation of the electronic component of such as monolithic ceramic capacitor and so on, oblate spheroid sprills are used as unfavorable material in coating materials, adversely have impact on the reliability of element thus; Such as, oblate spheroid sprills cause layer short circuit.
EP 782 881 describes the method using good pressure distribution device to prepare the dispersion of solid in O/W or W/O emulsion, wherein makes all components be directed through the nozzle of good pressure distribution device.
WO 01/05517 describes the method by using good pressure distribution device dispersed monomer to prepare the aqueous dispersion of bicomponent polyurethane coating, wherein can there is grinding filler in addition in this dispersion.In the method, all components of dispersion is made to be directed through the nozzle of good pressure distribution device.This equipment must by ceramic material hard especially, as zirconia or carborundum are made.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides the process for dispersing of a kind of conductive powder and monomer: the first dispersion is passed through first jet with the first pressure charging, second dispersion is passed through second nozzle with the second pressure charging, first pressure is greater than the second pressure, then two kinds of monomers is mixed into mixing chamber; Wherein control the second pressure with the pressure limit of 100 to 2000 bar, the first dispersed monomer axially flowed out drives the second dispersed monomer, and mix with it, significantly improve in mixing chamber Turbulent Kinetic, inertia force in turbulent flow causes monomer particle to disperse and de-agglomerate in this fluid, significantly reduced the wearing and tearing of nozzle by this technology controlling and process, good pressure distribution method makes to input very high local power density in dispersion, therefore more effectively pulverizes agglomerate combination; By conductive powder by the 3rd nozzle, the ejection pressure of the 3rd nozzle is greater than the first pressure 20-50 and clings to, and by using solvent dilution before the step of dispersed electro-conductive powder, described solvent is organic solvent.
Described monomer emulsions comprises methacrylate or acrylate.
Can by by the metal metal dust of at least one selected in silver, copper, nickel, palladium and its alloy (be included in conduction coating materials in) as the conductive powder comprised in solvent.To the not special restriction of the kind of metal and alloy, various metal and alloy can be used and there is no what problem.
The typical sizes that size is the conductive powder comprised in conduction coating materials the particle size of conductive powder had no particular limits, as long as just can.But, when the average particle size of conductive powder is that 1 μm or less (this size is not easy by utilizing traditional dispersion technology of such as three-roller type grinder to obtain) the present invention shows particularly advantageous effect under an electron microscope.
Detailed description of the invention
Embodiment 1
The process for dispersing of a kind of conductive powder and monomer, first dispersion is passed through first jet with the first pressure charging, second dispersion is also passed through second nozzle with the second pressure charging, and the first pressure is greater than the second pressure, then two kinds of monomers is mixed into mixing chamber; Wherein control the second pressure with the pressure limit of 2000 bar, the first dispersed monomer axially flowed out drives the second dispersed monomer, and mix with it, significantly improve in mixing chamber Turbulent Kinetic, inertia force in turbulent flow causes monomer particle to disperse and de-agglomerate in this fluid, significantly reduced the wearing and tearing of nozzle by this technology controlling and process, good pressure distribution method makes to input very high local power density in dispersion, therefore more effectively pulverizes agglomerate combination; By conductive powder by the 3rd nozzle, the ejection pressure of the 3rd nozzle is greater than the first pressure 50 bar, and by using solvent dilution before the step of dispersed electro-conductive powder, described solvent is organic solvent.
Embodiment 2
The process for dispersing of a kind of conductive powder and monomer, first dispersion is passed through first jet with the first pressure charging, second dispersion is also passed through second nozzle with the second pressure charging, and the first pressure is greater than the second pressure, then two kinds of monomers is mixed into mixing chamber; Wherein control the second pressure with the pressure limit of 100 bar, the first dispersed monomer axially flowed out drives the second dispersed monomer, and mix with it, significantly improve in mixing chamber Turbulent Kinetic, inertia force in turbulent flow causes monomer particle to disperse and de-agglomerate in this fluid, significantly reduced the wearing and tearing of nozzle by this technology controlling and process, good pressure distribution method makes to input very high local power density in dispersion, therefore more effectively pulverizes agglomerate combination; By conductive powder by the 3rd nozzle, the ejection pressure of the 3rd nozzle is greater than the first pressure 20 bar, and by using solvent dilution before the step of dispersed electro-conductive powder, described solvent is organic solvent.
Embodiment 3
The process for dispersing of a kind of conductive powder and monomer, first dispersion is passed through first jet with the first pressure charging, second dispersion is also passed through second nozzle with the second pressure charging, and the first pressure is greater than the second pressure, then two kinds of monomers is mixed into mixing chamber; Wherein control the second pressure with the pressure limit of 1000 bar, the first dispersed monomer axially flowed out drives the second dispersed monomer, and mix with it, significantly improve in mixing chamber Turbulent Kinetic, inertia force in turbulent flow causes monomer particle to disperse and de-agglomerate in this fluid, significantly reduced the wearing and tearing of nozzle by this technology controlling and process, good pressure distribution method makes to input very high local power density in dispersion, therefore more effectively pulverizes agglomerate combination; By conductive powder by the 3rd nozzle, the ejection pressure of the 3rd nozzle is greater than the first pressure 23 bar, and by using solvent dilution before the step of dispersed electro-conductive powder, described solvent is organic solvent.
Embodiment 4
The process for dispersing of a kind of conductive powder and monomer, first dispersion is passed through first jet with the first pressure charging, second dispersion is also passed through second nozzle with the second pressure charging, and the first pressure is greater than the second pressure, then two kinds of monomers is mixed into mixing chamber; Wherein control the second pressure with the pressure limit of 1005 bar, the first dispersed monomer axially flowed out drives the second dispersed monomer, and mix with it, significantly improve in mixing chamber Turbulent Kinetic, inertia force in turbulent flow causes monomer particle to disperse and de-agglomerate in this fluid, significantly reduced the wearing and tearing of nozzle by this technology controlling and process, good pressure distribution method makes to input very high local power density in dispersion, therefore more effectively pulverizes agglomerate combination; By conductive powder by the 3rd nozzle, the ejection pressure of the 3rd nozzle is greater than the first pressure 26 bar, and by using solvent dilution before the step of dispersed electro-conductive powder, described solvent is organic solvent.
Embodiment 5
The process for dispersing of a kind of conductive powder and monomer, first dispersion is passed through first jet with the first pressure charging, second dispersion is also passed through second nozzle with the second pressure charging, and the first pressure is greater than the second pressure, then two kinds of monomers is mixed into mixing chamber; Wherein control the second pressure with the pressure limit of 2000 bar, the first dispersed monomer axially flowed out drives the second dispersed monomer, and mix with it, significantly improve in mixing chamber Turbulent Kinetic, inertia force in turbulent flow causes monomer particle to disperse and de-agglomerate in this fluid, significantly reduced the wearing and tearing of nozzle by this technology controlling and process, good pressure distribution method makes to input very high local power density in dispersion, therefore more effectively pulverizes agglomerate combination; By conductive powder by the 3rd nozzle, the ejection pressure of the 3rd nozzle is greater than the first pressure 20 bar, and by using solvent dilution before the step of dispersed electro-conductive powder, described solvent is organic solvent.
Embodiment 6
The process for dispersing of a kind of conductive powder and monomer, first dispersion is passed through first jet with the first pressure charging, second dispersion is also passed through second nozzle with the second pressure charging, and the first pressure is greater than the second pressure, then two kinds of monomers is mixed into mixing chamber; Wherein control the second pressure with the pressure limit of 1920 bar, the first dispersed monomer axially flowed out drives the second dispersed monomer, and mix with it, significantly improve in mixing chamber Turbulent Kinetic, inertia force in turbulent flow causes monomer particle to disperse and de-agglomerate in this fluid, significantly reduced the wearing and tearing of nozzle by this technology controlling and process, good pressure distribution method makes to input very high local power density in dispersion, therefore more effectively pulverizes agglomerate combination; By conductive powder by the 3rd nozzle, the ejection pressure of the 3rd nozzle is greater than the first pressure 48 bar, and by using solvent dilution before the step of dispersed electro-conductive powder, described solvent is organic solvent.
Embodiment 7
The process for dispersing of a kind of conductive powder and monomer, first dispersion is passed through first jet with the first pressure charging, second dispersion is also passed through second nozzle with the second pressure charging, and the first pressure is greater than the second pressure, then two kinds of monomers is mixed into mixing chamber; Wherein control the second pressure with the pressure limit of 1920 bar, the first dispersed monomer axially flowed out drives the second dispersed monomer, and mix with it, significantly improve in mixing chamber Turbulent Kinetic, inertia force in turbulent flow causes monomer particle to disperse and de-agglomerate in this fluid, significantly reduced the wearing and tearing of nozzle by this technology controlling and process, good pressure distribution method makes to input very high local power density in dispersion, therefore more effectively pulverizes agglomerate combination; By conductive powder by the 3rd nozzle, the ejection pressure of the 3rd nozzle is greater than the first pressure 40 bar, and by using solvent dilution before the step of dispersed electro-conductive powder, described solvent is organic solvent.
Aforementioned embodiments and advantage are only exemplary, can not be understood as the restriction disclosure.This instruction can easily for the device of other type.This explanation is intended to be illustrated, and is not the protection domain of restriction claim.Many substitute, amendment and modification be obvious to those skilled in the art.Can combine by different modes to obtain exemplary embodiment that is additional and/or that substitute in this feature of typical embodiment described, structure, method and other characteristic.
Claims (1)
1. the process for dispersing of a conductive powder and monomer, it is characterized in that: the first dispersion is passed through first jet with the first pressure charging, second dispersion is also passed through second nozzle with the second pressure charging, and the first pressure is greater than the second pressure, then two kinds of monomers is mixed into mixing chamber; Wherein control the second pressure with the pressure limit of 100 to 2000 bar, the first dispersed monomer axially flowed out drives the second dispersed monomer, and mix with it, significantly improve in mixing chamber Turbulent Kinetic, inertia force in turbulent flow causes monomer particle to disperse and de-agglomerate in this fluid, significantly reduced the wearing and tearing of nozzle by this technology controlling and process, good pressure distribution method makes to input very high local power density in dispersion, therefore more effectively pulverizes agglomerate combination; By conductive powder by the 3rd nozzle, the ejection pressure of the 3rd nozzle is greater than the first pressure 20-50 and clings to, and by using solvent dilution before the step of dispersed electro-conductive powder, described solvent is organic solvent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410629812.2A CN104399378A (en) | 2014-11-10 | 2014-11-10 | Method for dispersing conductive powder and monomers |
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| CN201410629812.2A CN104399378A (en) | 2014-11-10 | 2014-11-10 | Method for dispersing conductive powder and monomers |
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| CN104399378A true CN104399378A (en) | 2015-03-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110911080A (en) * | 2019-12-09 | 2020-03-24 | 云南中宣液态金属科技有限公司 | Magnetic functional material based on low-melting-point metal and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2008156835A2 (en) * | 2007-06-19 | 2008-12-24 | Renewable Algal Energy, Llc | Process and apparatus for adsorptive bubble separation using a dense foam |
| CN101610833A (en) * | 2007-03-26 | 2009-12-23 | 赢创德固赛有限责任公司 | The high pressure process for dispersing of reactive monomer |
| CN102254585A (en) * | 2010-04-19 | 2011-11-23 | 住友金属矿山株式会社 | Method for manufacturing conductive paste |
| CN203648401U (en) * | 2013-12-18 | 2014-06-18 | 北京矿冶研究总院 | automatic mixing device for powder and liquid |
| CN103945926A (en) * | 2011-09-16 | 2014-07-23 | 西门子公司 | Mixing device for mixing agglomerating powder in a suspension |
-
2014
- 2014-11-10 CN CN201410629812.2A patent/CN104399378A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101610833A (en) * | 2007-03-26 | 2009-12-23 | 赢创德固赛有限责任公司 | The high pressure process for dispersing of reactive monomer |
| WO2008156835A2 (en) * | 2007-06-19 | 2008-12-24 | Renewable Algal Energy, Llc | Process and apparatus for adsorptive bubble separation using a dense foam |
| CN102254585A (en) * | 2010-04-19 | 2011-11-23 | 住友金属矿山株式会社 | Method for manufacturing conductive paste |
| CN103945926A (en) * | 2011-09-16 | 2014-07-23 | 西门子公司 | Mixing device for mixing agglomerating powder in a suspension |
| CN203648401U (en) * | 2013-12-18 | 2014-06-18 | 北京矿冶研究总院 | automatic mixing device for powder and liquid |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110911080A (en) * | 2019-12-09 | 2020-03-24 | 云南中宣液态金属科技有限公司 | Magnetic functional material based on low-melting-point metal and preparation method thereof |
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Application publication date: 20150311 |