CN103170416B - A kind of static nozzle and using method thereof - Google Patents
A kind of static nozzle and using method thereof Download PDFInfo
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- CN103170416B CN103170416B CN201310131847.9A CN201310131847A CN103170416B CN 103170416 B CN103170416 B CN 103170416B CN 201310131847 A CN201310131847 A CN 201310131847A CN 103170416 B CN103170416 B CN 103170416B
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Abstract
The invention discloses a kind of static nozzle and using method thereof, comprise nozzle body, cap of spraying nozzle and nozzle control governor gear, described nozzle body front end is provided with nozzle, described nozzle body is provided with nozzle chamber vertically, described nozzle body is provided with the liquid inlet that to communicate with described nozzle chamber, described nozzle control governor gear is connected to the rear end of described nozzle body, described nozzle control governor gear is fixed with nozzle needle, one end of described nozzle needle is passed described nozzle chamber and stretches out outside described nozzle, described cap of spraying nozzle is enclosed within the front end of described nozzle body, described cap of spraying nozzle is provided with cap of spraying nozzle inner chamber vertically, static nozzle is also provided with the air flow inlet communicated with described cap of spraying nozzle inner chamber.Static nozzle provided by the invention and using method thereof substantially increase has the particle of micron or nanoscale or the manufacturing speed of coating, improves operating efficiency.
Description
Technical field
The invention belongs to the field that electrostatic spraying prepares micron, nano particle and coating, particularly a kind of static nozzle for the preparation of micro particles, nano particle and coating thereof and using method thereof.
Background technology
Electrostatic spraying is by being applied with the capillary of certain voltage by Small molecular or Polymer Solution or solution, when the Charge repulsion on drop surface exceedes its surface tension, fine liquid will be penetrated at a high speed at liquid surface, these jets are constantly stretched under the effect of electrostatic force, when solution has the strand enough tangled along jet axial orientation, can the stretching of equilibrium electric field power, keep the continuity of jet, to form fiber, this process is also called electrostatic spinning; Otherwise jet will break to form the particle of micron or nano-scale, and this process is called electrostatic atomization or EFI.
Elecstrostatic spraying apparatus formed primarily of high-voltage generator, solution supplying device, injection apparatus and gathering-device.Its principle for set up an electrostatic field of force at high pressure generator between jetting fluid and receiving system, when electrostatic field intensity exceedes critical value, the surface tension that polymer solution or melt overcome self under electric field force effect forms one charged injection stream in spinning nozzle place.Due to electrostatic repulsion; there is bending or whip at high speed and move in charged thread; along with solvent volatilization or melt cooling, the cooling of charged thread obtains the particle of diameter between tens nanometers are to several microns or fiber, finally drops on gathering-device and forms Particle Cluster or fiber film material closely.
Adopt electrostatic spraying technology can prepare the particulate of true fibre or uniform particle sizes.On the particle preparing micron or nano-scale, it does not need emulsifying agent, directly just can obtain the particle of uniform particle sizes, have great advantage.But its maximum restriction is exactly be in preparation speed, typical capillary is adopted to be shower nozzle, its liquid feed speed needs with liquid that to fly to the speed of counter electrode consistent overcoming surface tension, its typical speed is that tens microlitres are per hour to some milliliters, greatly limits its application in the industrial production.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide a kind of static nozzle, greatly improves the make efficiency of micro particles and nano particle and coating thereof.
To achieve these goals, the invention provides following technical scheme:
A kind of static nozzle, it is characterized in that, comprise nozzle body, cap of spraying nozzle and nozzle control governor gear, described nozzle body front end is provided with nozzle, described nozzle body is provided with nozzle chamber vertically, described nozzle body is provided with the liquid inlet that to communicate with described nozzle chamber, described nozzle control governor gear is connected to the rear end of described nozzle body, described nozzle control governor gear is fixed with nozzle needle, one end of described nozzle needle is passed described nozzle chamber and stretches out outside described nozzle, described cap of spraying nozzle is enclosed within the front end of described nozzle body, described cap of spraying nozzle is provided with cap of spraying nozzle inner chamber vertically, static nozzle is also provided with the air flow inlet communicated with described cap of spraying nozzle inner chamber.
Preferably, described nozzle needle is the cuspidated conductor of one end band, and the needle body axis of described nozzle needle is coaxial with the center line of described nozzle.
Preferably, described nozzle body is provided with screwed hole of centre, described nozzle control governor gear is provided with external screw thread, described nozzle control governor gear is placed in described screwed hole of centre, controls length that described nozzle needle stretches out described nozzle regulate gap between described nozzle needle and described nozzle by described nozzle control governor gear.
Preferably, described nozzle body, described cap of spraying nozzle and described nozzle control governor gear are made up of insulating materials.
Preferably, described air flow inlet is arranged on described cap of spraying nozzle.
Preferably, described air flow inlet is arranged in described nozzle body.
Another technical scheme that this programme provides is:
A using method for above-mentioned static nozzle, the method comprises the following steps:
S
1, static nozzle is fixed on assigned address, the distance adjusted static nozzle and receiving system or spray between workpiece;
S
2, open high voltage source, supply voltage is adjusted to predetermined value;
S
3, open gas piping, gas pressure, gas flow and gas temperature are adjusted to predetermined value;
S
4, open liquid-supplying system, fluid flow is adjusted to predetermined value.
Preferably, described receiving system is the dash receiver that conductor is formed or the container filling liquid.
Static nozzle provided by the present invention compared with prior art, because the present invention adopts gas that charged liquid is broken, form charged drop, after charged drop leaves nozzle, second-time breakage is there is under the effect of Charge repulsion, thus it is less to obtain particle diameter, more uniform particle, simultaneously because second-time breakage is after charged drop departs from nozzle, the feed speed of liquid is mainly limited to air-flow to the atomizing effect of drop and guarantee drop have on applicable carried charge, typical liquid feed speed is per minute at some milliliters, thus greatly improve micron, speed prepared by nano-scale and speed prepared by coating, greatly improve operating efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is the structural representation of the static nozzle of the embodiment of the present invention one;
Fig. 2 is the structural representation of the static nozzle of the embodiment of the present invention two;
Fig. 3 is fundamental diagram of the present invention.
Wherein,
1, nozzle body; 2, cap of spraying nozzle; 3, nozzle control governor gear; 4, nozzle;
5, nozzle chamber; 6, liquid inlet; 7, cap of spraying nozzle cavity; 8, air flow inlet;
9, nozzle needle; 10, screwed hole of centre.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one:
As shown in Figure 1, the invention provides a kind of static nozzle, comprise nozzle body 1, nozzle body 1 is provided with nozzle 4, be axially arranged with nozzle chamber 5 along axle nozzle body 1 in nozzle body 1, nozzle body 1 is also provided with liquid inlet 6, and liquid inlet 6 is connected with nozzle chamber 5.Cap of spraying nozzle 2 is had at the front end sleeve of nozzle body 1, cap of spraying nozzle cavity 7 is axially arranged with along cap of spraying nozzle 2 on cap of spraying nozzle 2, cap of spraying nozzle 2 is also provided with air flow inlet 8, air flow inlet 8 is connected with cap of spraying nozzle cavity 7, when cap of spraying nozzle 2 is enclosed within nozzle body 1, nozzle 4 is placed in cap of spraying nozzle cavity 7, and nozzle 4 center line is coaxial with the center line of cap of spraying nozzle cavity 7.Nozzle control governor gear 3 is connected in the rear end of nozzle body 1, nozzle control governor gear 3 is provided with external screw thread, nozzle control governor gear 3 is placed in the screwed hole of centre 10 in nozzle body 1, nozzle control governor gear 3 is fixed with nozzle needle 9, nozzle needle 9 is the cuspidated conductor of one end band, nozzle needle 9 passes nozzle chamber 5 with most advanced and sophisticated one end and stretches out outside nozzle 4, the needle body axis of nozzle needle 9 is coaxial with the center line of nozzle 4, the exit of nozzle chamber 5 is tapered, the length that nozzle needle 9 stretches out outside nozzle 4 is longer, gap between nozzle chamber 5 exit nozzle chamber 5 and nozzle needle 9 is less, the length that nozzle needle 9 stretches out outside nozzle 4 is realized by nozzle control governor gear 3.Because need higher voltage during work, can there is larger leakage current, in order to avoid leakage current works the mischief to people and equipment, nozzle body 1, cap of spraying nozzle 2 are made up of insulating materials with nozzle control governor gear 3, are preferably tetrafluoroethene, polyether-ether-ketone.
Embodiment two:
As shown in Figure 2, the invention provides a kind of static nozzle, comprise nozzle body 1, nozzle body 1 is provided with nozzle 4, nozzle chamber 5 is axially arranged with along axle nozzle body 1 in nozzle body 1, nozzle body 1 is also provided with liquid inlet 6, and liquid inlet 6 is connected with nozzle chamber 5, and nozzle body 1 is also provided with air flow inlet 8.Cap of spraying nozzle 2 is had at the front end sleeve of nozzle body 1, cap of spraying nozzle cavity 7 is axially arranged with along cap of spraying nozzle 2 on cap of spraying nozzle 2, air flow inlet 8 is connected with cap of spraying nozzle cavity 7, when cap of spraying nozzle 2 is enclosed within nozzle body 1, nozzle 4 is placed in cap of spraying nozzle cavity 7, and nozzle 4 center line is coaxial with the center line of cap of spraying nozzle cavity 7.Nozzle control governor gear 3 is connected in the rear end of nozzle body 1, nozzle control governor gear 3 is provided with external screw thread, nozzle control governor gear 3 is placed in the screwed hole of centre 10 in nozzle body 1, nozzle control governor gear 3 is fixed with nozzle needle 9, nozzle needle 9 is the cuspidated conductor of one end band, nozzle needle 9 passes nozzle chamber 5 with most advanced and sophisticated one end and stretches out outside nozzle 4, the needle body axis of nozzle needle 9 is coaxial with the center line of nozzle 4, the exit of nozzle chamber 5 is tapered, the length that nozzle needle 9 stretches out outside nozzle 4 is longer, gap between nozzle chamber 5 exit nozzle chamber 5 and nozzle needle 9 is less, the length that nozzle needle 9 stretches out outside nozzle 4 is realized by nozzle control governor gear 3.Because need higher voltage during work, can there is larger leakage current, in order to avoid leakage current works the mischief to people and equipment, nozzle body 1, cap of spraying nozzle 2 are made up of insulating materials with nozzle control governor gear 3, are preferably tetrafluoroethene, polyether-ether-ketone.
Operation principle of the present invention: as shown in Figure 2, during static nozzle work, predetermined voltage is added to nozzle needle, allow electric charge enough on liquid band, under the propelling of pump, charged liquid flows out from the gap of nozzle and nozzle needle, run into the air-flow from flowing out at a high speed between cap of spraying nozzle and nozzle, charged misty liquid droplets is formed under the impact of air-flow, these vaporific drops are along with the volatilization of solvent, volume is more and more less, charge density is increasing simultaneously, when the charge density of drop acquires a certain degree, Charge repulsion is made to be greater than the surface tension of drop, it is broken into new some fine droplets, until the Charge repulsion on drop surface and surface tension reach balance.Meanwhile, drop after fragmentation under the effect of air-flow and charge force to ground connection or the workpiece or the receiving system motion that connect opposite electrode, as the effect sprayed workpiece can be obtained when solvent does not volatilize and completely namely arrives surface of the work, the particle of nanometer or micron-scale completely namely can be obtained as solvent had volatilized before arrival receiving system.The dash receiver that gathering-device can take simple conductor to form, can receive dry pulverized particles like this; Also can take the collection container filling suitable liquid, the particulate sprayed directly is dispersed in and collect in liquid, avoid the gathering of particle.
Present invention also offers a kind of using method of above-mentioned static nozzle, the method comprises the steps:
S
1, static nozzle is fixed on assigned address, the distance adjusted static nozzle and receiving system or spray between workpiece;
S
2, open high voltage source, supply voltage is adjusted to predetermined value;
S
3, open gas piping, gas pressure, gas flow and gas temperature are adjusted to predetermined value;
S
4, open liquid-supplying system, fluid flow is adjusted to predetermined value.
Wherein, S
1middle receiving system can for multiple according to the difference preparing particle, the dash receiver made as conductor or fill the collection container of liquid.
Be described below by the using method of concrete test to above-mentioned static nozzle.
1, the preparation of the nano particle of rhodamine B polylactic acid-polyglycolic acid is wrapped up:
Be fixed on by this shower nozzle on the tetrafluoroethene rod of insulation, shower nozzle injection direction is downward, and thereunder 30cm place placement one aluminum collects disk, disk reliable ground.High voltage source adopts negative high voltage power source.By 5mg rhodamine B and 0.5g molecular weight be 10,000 polylactic acid-polyglycolic acid (75:25) be dissolved in 9.5g acetonitrile, for subsequent use after dissolving.Connect relevant high-tension circuit, after gas piping and liquid line, open high voltage source, power supply is transferred to 50KV, gas piping air pressure is adjusted to 20kpa, gas temperature is room temperature, and fluid flow is 1.35ml/min.Spraying terminates rear collection disk powder, namely obtains the nano particle of the polylactic acid-polyglycolic acid being enclosed with rhodamine.
2, the preparation of the nano particle of the polylactic acid-polyglycolic acid of camptothecine is wrapped up:
Be fixed on by this shower nozzle on the tetrafluoroethene rod of insulation, shower nozzle injection direction is downward, and thereunder dish collected by 40cm place placement one stainless steel, fills with ethanol as collection liquid, collect dish reliable ground in dish.High voltage source adopts negative high voltage power source.By 50mg camptothecine and 1g molecular weight be 20,000 polylactic acid-polyglycolic acid (75:25) be dissolved in 9g dimethyl formamide, for subsequent use after dissolving.Connect relevant high-tension circuit, after gas piping and liquid line, open high voltage source, power supply is transferred to 80KV, gas piping air pressure is adjusted to 20kpa, gas temperature is room temperature, and fluid flow is 0.45ml/min.The particle of ejection is collected liquid by ethanol and is collected, and uniform particle is distributed in ethanol.After the ethanolic solution being dispersed with particle is added suitable quantity of water, decompression distillation major part ethanol, obtains dispersion nano particle in aqueous, after freeze-drying, namely obtains the polylactic acid-polyglycolic acid nano particle being loaded with camptothecine.
3, the preparation of Paclitaxe-eluting stent:
Be fixed on by this shower nozzle on the tetrafluoroethene rod of insulation, shower nozzle injection direction is downward, thereunder 10cm place placement one bare metal stent, reliable ground.High voltage source adopts negative high voltage power source.By 6mg taxol and 0.1g molecular weight be 20,000 polylactic acid-polyglycolic acid (75:25) be dissolved in 3g chloroform, for subsequent use after dissolving.Connect relevant high-tension circuit, after gas piping and liquid line, open high voltage source, power supply is transferred to 30KV, gas piping air pressure is adjusted to 5kpa, gas temperature is room temperature, and fluid flow is 0.45ml/min.Namely the drop of ejection arrives the surface of metallic support after non-bone dry, controls spray time and suitable runing rest well, can obtain the polylactic acid-polyglycolic acid polymeric medicine coating bracket containing taxol.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. a static nozzle, for the preparation of micro particles or nano particle, it is characterized in that, comprise nozzle body, cap of spraying nozzle and nozzle control governor gear, described nozzle body front end is provided with nozzle, described nozzle body is provided with nozzle chamber vertically, described nozzle body is provided with the liquid inlet that to communicate with described nozzle chamber, described nozzle control governor gear is connected to the rear end of described nozzle body, described nozzle control governor gear is fixed with nozzle needle, one end of described nozzle needle is passed described nozzle chamber and stretches out outside described nozzle, described cap of spraying nozzle is enclosed within the front end of described nozzle body, described cap of spraying nozzle is provided with cap of spraying nozzle inner chamber vertically, static nozzle is also provided with the air flow inlet communicated with described cap of spraying nozzle inner chamber.
2. static nozzle according to claim 1, is characterized in that, described nozzle needle is the cuspidated conductor of one end band, and the needle body axis of described nozzle needle is coaxial with the center line of described nozzle.
3. static nozzle according to claim 2, it is characterized in that, described nozzle body is provided with screwed hole of centre, described nozzle control governor gear is provided with external screw thread, described nozzle control governor gear is placed in described screwed hole of centre, controls length that described nozzle needle stretches out described nozzle regulate gap between described nozzle needle and described nozzle by described nozzle control governor gear.
4. static nozzle according to claim 3, is characterized in that, described nozzle body, described cap of spraying nozzle and described nozzle control governor gear are made up of insulating materials.
5. static nozzle according to claim 4, is characterized in that, described air flow inlet is arranged on described cap of spraying nozzle.
6. static nozzle according to claim 4, is characterized in that, described air flow inlet is arranged in described nozzle body.
7. as a using method for the static nozzle in claim 1 ~ 6 as described in any one, it is characterized in that, the method comprises the following steps:
S1, static nozzle is fixed on assigned address, the distance adjusted static nozzle and receiving system or spray between workpiece;
S2, unlatching high voltage source, adjust to predetermined value by supply voltage;
S3, unlatching gas piping, adjust to predetermined value by gas pressure, gas flow and gas temperature;
S4, unlatching liquid-supplying system, adjust to predetermined value by spraying liquid flow.
8. using method according to claim 7, is characterized in that, described receiving system is the dash receiver that conductor is formed or the container filling collection liquid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310131847.9A CN103170416B (en) | 2013-04-16 | 2013-04-16 | A kind of static nozzle and using method thereof |
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| CN201310131847.9A CN103170416B (en) | 2013-04-16 | 2013-04-16 | A kind of static nozzle and using method thereof |
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| CN103170416A CN103170416A (en) | 2013-06-26 |
| CN103170416B true CN103170416B (en) | 2016-02-03 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6496186B2 (en) * | 2015-05-26 | 2019-04-03 | 株式会社Ｓｃｒｅｅｎホールディングス | Substrate processing equipment |
| CN106142843B (en) * | 2016-07-06 | 2017-08-22 | 大连理工大学 | A kind of coaxial electrical fluid dynamic printing head device |
| CN106924046A (en) * | 2017-04-24 | 2017-07-07 | 中国科学技术大学 | Medicine-carrying capsule prepares shower nozzle and medicine-carrying capsule preparation facilities |
| CN107596791B (en) * | 2017-08-17 | 2020-05-26 | 东华大学 | Composite nanofiber filtering material with photocatalytic function and preparation method thereof |
| CN107605387B (en) * | 2017-08-17 | 2020-10-30 | 东华大学 | Ultraviolet-proof nanofiber composite screen window and preparation method thereof |
| CN107475786B (en) * | 2017-08-17 | 2020-08-04 | 东华大学 | Combined needle for electrostatic spinning |
| CN107497182B (en) * | 2017-08-17 | 2020-05-26 | 东华大学 | Composite nanofiber filtering material with photocatalysis/antibacterial functions and preparation method thereof |
| WO2019167025A1 (en) * | 2018-03-01 | 2019-09-06 | Dh Technologies Development Pte. Ltd. | Integrated electrospray emitter and methods for making same |
| CN108554662A (en) * | 2018-06-29 | 2018-09-21 | 江苏大学 | A kind of spiral gas-liquid double-fluid electrostatic atomization nozzle |
| CN108906524B (en) * | 2018-07-14 | 2022-01-18 | 福州大学 | Method for encapsulating quantum dot light guide plate based on electrostatic atomization film forming |
| CN111515070B (en) * | 2020-04-30 | 2021-08-13 | 湖南大学 | Method and device for preparing film through electrostatic air spray thermocuring |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5803367A (en) * | 1994-02-18 | 1998-09-08 | Itw Limited | Spray gun |
| CN2717531Y (en) * | 2004-07-31 | 2005-08-17 | 罗南东 | Electrostatic powder spraying pistol outlet |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007237089A (en) * | 2006-03-09 | 2007-09-20 | Anest Iwata Corp | Spray gun for powder electrostatic coating |
| JP2009095750A (en) * | 2007-10-16 | 2009-05-07 | Jtekt Corp | Spray gun |
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- 2013-04-16 CN CN201310131847.9A patent/CN103170416B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5803367A (en) * | 1994-02-18 | 1998-09-08 | Itw Limited | Spray gun |
| CN2717531Y (en) * | 2004-07-31 | 2005-08-17 | 罗南东 | Electrostatic powder spraying pistol outlet |
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Effective date of registration: 20181212 Address after: 410000 No. 1 Sanyi Industrial Town No. 7, Sanyi Road, Changsha Economic and Technological Development Zone, Hunan Province Patentee after: Hunan Tian Kai Automation Technology Co., Ltd. Address before: 410000 Zhujialong Formation 140, Dongtang Village, Huanghua Town, Changsha County, Hunan Province Patentee before: Hu Quan |
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