CN103668486B - The auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of a kind of air-flow - Google Patents
The auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of a kind of air-flow Download PDFInfo
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- CN103668486B CN103668486B CN201310651395.7A CN201310651395A CN103668486B CN 103668486 B CN103668486 B CN 103668486B CN 201310651395 A CN201310651395 A CN 201310651395A CN 103668486 B CN103668486 B CN 103668486B
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Abstract
The invention discloses the auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of a kind of air-flow, belong to electrostatic spinning field, device comprises fiber dash receiver, male cone (strobilus masculinus) airflow duct, head, screw, setscrew nut, barrel, barrel fixed block, heating collar, temperature sensor, earth electrode and HV generator etc., melt is assigned to by the uniform flow passage of airflow duct outer wall on the shower nozzle of male cone (strobilus masculinus), under the effect of gravity and adhesion, melt film is natural attenuate in the process forming, under the effect of high-pressure electrostatic, melt forms taylor cone at the tip of male cone (strobilus masculinus), thereby form jet spinning, due to melt film attenuate, so can effectively fall low-fiber diameter, and fiber is further stretched under the effect of high velocity air, the external and internal pressure official post fibre bundle that high velocity air forms is inwardly gathered, the density that effectively improves fiber is arranged, this device can also be got rid of the interference of high velocity air to melt film, make fibre diameter more even.
Description
Technical field
The present invention relates to the auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of a kind of air-flow, belong to electrostatic spinning neckTerritory.
Background technology
Along with the intensification of nanometer technology, electrospinning process is because it can prepare nano level fibreDimension and become one of current study hotspot. Electrospinning process has been acknowledged as preparation nanometer fibreThe effective method of dimension, existing 30 multiple polymers successfully make by the method at presentSuperfine fibre, minimum diameter reaches tens nanometers.
The general principle of melt electrostatic spinning is that melt passes through the effect in high-voltage electrostatic field after spinneret orificeUnder there is gradually deformation, in the time that electric field force is greater than the surface tension of melt, the melt of spinneret orifice endWill strive de-its surface tension formation melt jet stream at a high speed and fly to dash receiver, finally form ultra-fineFiber.
Hindering the industrialized key issue of melt electrostatic spinning is at present output, the fibre diameter of fiberFurther reduce and the uniformity of fibre diameter.
A kind of melt differential electrostatic spinning nozzle of Chinese invention patent (application number 201310159570.0)The auxiliary structure of hot blast in the middle of middle employing inner conical surface shower nozzle adds, this structure has improved the effect of electrostatic spinningRate, but melt gravitate on inner conical surface, at most advanced and sophisticated position, melt film is thicker, directly causesThe diameter of fiber is thicker, and under the disturbance of high velocity air, most advanced and sophisticated melt film is distributedInequality, causes fibre diameter size distribution inhomogeneous, even causes the generation of drop in fiber.
Summary of the invention
The present invention proposes the auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of a kind of air-flow, outside having adoptedConical-surface type shower nozzle, makes melt under the effect of gravity and adhesion, flows and forms melt at the conical surfaceNatural attenuate in the process of film, thus low-fiber diameter falls, and make melt thin in formationIn the middle of avoiding in the process of film, the impact of high velocity air, has solved at tip portion melt and has been subject to air-flow shadowRing the problem of skewness and fiber disturbance, thereby solved asking of fibre diameter size distribution inequalityTopic, in spinning process, high velocity air form external and internal pressure poor can make spun fibre bundle toInside gather, reach the object that improves fiber distribution density.
In order to realize above-mentioned functions, the technical solution used in the present invention is as follows: outside a kind of air-flow is auxiliaryConical-surface type electrostatic spinning nozzle, mainly comprise fiber dash receiver, male cone (strobilus masculinus) airflow duct, head,Screw, setscrew nut, barrel, barrel fixed block, heating collar, temperature sensor, earth electrodeWith HV generator etc., anchor point and head tight fit connection on male cone (strobilus masculinus) airflow duct, onEnd carries out axial location with setscrew nut, cylindrical hole in male cone (strobilus masculinus) airflow duct external cylindrical surface and headForm gap, melt flows in gap, and it is circumferentially being evenly distributed; Barrel fixed block will be expectedCylinder is fixed by screws on head; Fiber dash receiver is fixed under male cone (strobilus masculinus) airflow duct oneSet a distance place, and be connected with HV generator, quiet with the head lower end formation high pressure of ground connectionElectric field, under the effect of electric field force, melt forms at the most advanced and sophisticated position of the conical surface of male cone (strobilus masculinus) airflow ductTaylor cone, thus form jet and be deposited on fiber dash receiver; Male cone (strobilus masculinus) airflow duct center hasCylindrical hole leads to high velocity air, and fiber is further stretched and forms nanofiber; On head, establishPut heating collar and temperature sensor, reach the object of heating and accurate temperature controlling.
The auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of a kind of air-flow of the present invention, head upper side has headRunner, the outlet of flow channel upper end and barrel is connected, and is processed with that cylindrical hole is used for and outer cone on headFace airflow duct coordinates to be installed.
The auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of a kind of air-flow of the present invention, has on male cone (strobilus masculinus) airflow ductAnchor point coordinates installation with head cylindrical hole, makes male cone (strobilus masculinus) airflow duct outside wall surface and head cylindrical holeInternal face forms gap, melt is flowed in gap, and then be circumferentially evenly distributed.
The auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of a kind of air-flow of the present invention, male cone (strobilus masculinus) airflow duct lower endHave male cone (strobilus masculinus) surface, this surface can be smooth, and guiding gutter also can be set, and melt is at gravityWith under adhesion effect in male cone (strobilus masculinus) surface distributed evenly and attenuate, male cone (strobilus masculinus) end is provided with pointEnd, is conducive to accumulation, forms jet thereby strengthen electric-field intensity.
The auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of a kind of air-flow of the present invention, male cone (strobilus masculinus) airflow duct centerCylindrical hole leads to high velocity air, and fiber is further refinement under the stretching action of high velocity air, simultaneouslyThe pressure official post fibre bundle that high velocity air forms is inwardly gathered, and is conducive to improve the distribution density of fiber.
The auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of a kind of air-flow of the present invention, male cone (strobilus masculinus) airflow duct lower endMale cone (strobilus masculinus) tapering can have multiple choices, in the time that spinning medium is high-viscosity melt, due to its adhesionPower is larger, can select the male cone (strobilus masculinus) that tapering is less; In the time that spinning medium viscosity is lower, it is balance weightPower, can select the male cone (strobilus masculinus) that tapering is larger to carry out spinning.
The auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of a kind of air-flow of the present invention, the point of male cone (strobilus masculinus) airflow ductEnd can have various ways, and tip is side outward, also can be towards below, make different stickyThe melt medium of degree reaches optimum Match at electric-field intensity and the high velocity air drawing effect at most advanced and sophisticated positionValue.
From above technical scheme, the present invention compared with prior art tool has the following advantages:
1. the male cone (strobilus masculinus) of male cone (strobilus masculinus) airflow duct design, can make the work of melt at gravity and adhesionWith under, melt film form process in natural attenuate, thereby effectively reduce fibre diameter.
2. adopt the cooperation of the logical high velocity air of male cone (strobilus masculinus) distribution melt and center of male cone (strobilus masculinus) airflow ductMode, in fiber is further stretched under the effect of high velocity air, has avoided cleverlyThe disturbing influence of high velocity air to melt film and fiber, film is in outside, and the diameter of film increasesUnfettered, make fiber more even when refinement.
3. the logical high velocity air in male cone (strobilus masculinus) airflow duct center, can make the inside and outside mineralization pressure of fibre bundle poor,Thereby fibre bundle is inwardly gathered, improved the Density Distribution of fiber.
Brief description of the drawings
Fig. 1 is the cross-sectional schematic of the auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of a kind of air-flow of the present invention.
Fig. 2 is the male cone (strobilus masculinus) tip of the auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of a kind of air-flow of the present inventionA kind of version, male cone (strobilus masculinus) end is provided with tip.
In figure: 1-fiber dash receiver, 2-male cone (strobilus masculinus) airflow duct, 3-head, 4-screw, 5-locationNut, 6-barrel, 7-barrel fixed block, 8-flow channel, 9-heating collar, 10-temperature sensor,11-earth electrode, 12-HV generator.
Detailed description of the invention
The present invention proposes the auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of a kind of air-flow, as Fig. 1 and Fig. 2 instituteShow, mainly comprise: fiber dash receiver 1, male cone (strobilus masculinus) airflow duct 2, head 3, screw 4, barrel 6,Barrel fixed block 7, flow channel 8, heating collar 9, temperature sensor 10, earth electrode 11 and high pressureElectrostatic generator 12, fiber dash receiver 1 is fixed on the distance 12cm place, below of male cone (strobilus masculinus) airflow duct 2,The interior cylindrical hole of anchor point on male cone (strobilus masculinus) airflow duct 2 and head 3 adopts tight fit connection, barrel 6 timesEnd is contained on the flow channel 8 of head 3, and is fixed on head 3 head 3 by barrel fixed block 7Lower end is connected with earth electrode 11, and fiber dash receiver 1 is connected with HV generator 12, head 3On be provided with heating collar 9 and temperature sensor 10, play accurate temperature controlling effect, heating collar 9 temperature adjustTo 240 °, the male cone (strobilus masculinus) angle of male cone (strobilus masculinus) airflow duct 2 is 30 °, center cylindrical hole lower end inner coneFace angle is 60 °, adds polypropylene (PP6820) melt in barrel, 220 ° of melt temperatures,After 3 minutes, melt, at male cone (strobilus masculinus) surface uniform distribution one deck melt film, then regulates high pressureElectrostatic generator 12 voltage registrations, to 45kv, pass into 10m/s's simultaneously in male cone (strobilus masculinus) airflow duct 2High velocity air, under the dual stretching action of electric field force and high velocity air, a large amount of jets of melt compositionBe deposited on fiber dash receiver 1, and fibre bundle is inwardly poly-under the pressure differential effect of high velocity air formationHold together, and do not disturb between fiber, melt is at the male cone (strobilus masculinus) of male cone (strobilus masculinus) airflow duct 2 lower endsUpper flowing, and air-flow flows on the inner conical surface of male cone (strobilus masculinus) airflow duct 2, melt is at male cone (strobilus masculinus) air-flowTip and the air-flow of the male cone (strobilus masculinus) of conduit 2 lower ends meet, and melt film is not subject to the shadow of high velocity airRing, the fibre diameter of formation is thin and even, and discoid fiber laydown film thickness is even, and edge is neat.
Claims (4)
1. the auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of air-flow, is characterized in that: mainly comprise that fiber connectsReceive plate, male cone (strobilus masculinus) airflow duct, head, screw, setscrew nut, barrel, barrel fixed block,Heating collar, temperature sensor, earth electrode and HV generator, male cone (strobilus masculinus) airflow ductUpper anchor point and head tight fit connection, axial location, male cone (strobilus masculinus) are carried out with setscrew nut in upper endFormation gap, cylinder hole in airflow duct external cylindrical surface and head, melt flows in gap; MaterialCylinder fixed block is fixed by screws in barrel on head; Fiber dash receiver is fixed on male cone (strobilus masculinus) gasA distance under conduit, and be connected with HV generator, with the machine of ground connectionFormation high-voltage electrostatic field, lower end; Male cone (strobilus masculinus) airflow duct center has cylindrical hole to lead to high velocity air;Heating collar and temperature sensor are set on head; Head upper side has flow channel, head streamUpper end, road is connected with barrel outlet, is processed with cylindrical hole and is used for and male cone (strobilus masculinus) airflow duct on headCoordinate and install; There is male cone (strobilus masculinus) surface male cone (strobilus masculinus) airflow duct lower end; Melt is led at male cone (strobilus masculinus) air-flowOn the male cone (strobilus masculinus) of pipe lower end, flow, and air-flow flows on the inner conical surface of male cone (strobilus masculinus) airflow duct,Melt meets at tip and the air-flow of the male cone (strobilus masculinus) of male cone (strobilus masculinus) airflow duct lower end.
2. the auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of a kind of air-flow according to claim 1, its feature existsIn: on male cone (strobilus masculinus) airflow duct, there is anchor point to coordinate installation with head cylindrical hole, make male cone (strobilus masculinus) gasConduit outside wall surface and head cylindrical hole internal face form gap.
3. the auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of a kind of air-flow according to claim 1, its feature existsIn: the male cone (strobilus masculinus) surface of male cone (strobilus masculinus) airflow duct lower end is smooth, or guiding gutter is set, outerConical surface end is provided with tip.
4. the auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of a kind of air-flow according to claim 1, its feature existsIn: side outward, the tip of male cone (strobilus masculinus) airflow duct, or towards below.
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| CN201310651395.7A CN103668486B (en) | 2013-12-03 | 2013-12-03 | The auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of a kind of air-flow |
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| CN201310651395.7A CN103668486B (en) | 2013-12-03 | 2013-12-03 | The auxiliary male cone (strobilus masculinus) type electrostatic spinning nozzle of a kind of air-flow |
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| WO2014177039A1 (en) * | 2013-05-03 | 2014-11-06 | 北京化工大学 | Melt differential electrospinning device and process |
| CN105019039B (en) * | 2014-04-30 | 2017-01-04 | 崔建中 | Nanofiber prepared by melting electrostatic spinning method and the method |
| CN103924308A (en) * | 2014-05-03 | 2014-07-16 | 北京化工大学 | Solution differential electrostatic spinning device assisted by internal and external high-speed airflow |
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Application publication date: 20140326 Assignee: Zhangjiagang Lianjiang Machinery Co.,Ltd. Assignor: BEIJING University OF CHEMICAL TECHNOLOGY Contract record no.: X2022980023846 Denomination of invention: Air assisted external cone electrospinning nozzle Granted publication date: 20160511 License type: Common License Record date: 20221128 |
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