CN114411272A - Secondary fractal spiral electrostatic spinning head and tertiary fractal spiral electrostatic spinning head - Google Patents
Secondary fractal spiral electrostatic spinning head and tertiary fractal spiral electrostatic spinning head Download PDFInfo
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- CN114411272A CN114411272A CN202210015130.7A CN202210015130A CN114411272A CN 114411272 A CN114411272 A CN 114411272A CN 202210015130 A CN202210015130 A CN 202210015130A CN 114411272 A CN114411272 A CN 114411272A
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0069—Electro-spinning characterised by the electro-spinning apparatus characterised by the spinning section, e.g. capillary tube, protrusion or pin
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The invention discloses a secondary fractal spiral electrostatic spinning head and a tertiary fractal spiral electrostatic spinning head, wherein the secondary fractal spiral electrostatic spinning head is obtained by re-spiraling on the basis of a primary fractal spiral electrostatic spinning head based on a fractal dimension (part is self-similar to the whole) theory, and the tertiary fractal spiral electrostatic spinning head is obtained by re-spiraling the secondary fractal spiral electrostatic spinning head; compared with the existing primary spiral electrostatic spinning head, the secondary fractal spiral electrostatic spinning head and the tertiary fractal spiral electrostatic spinning head provided by the invention have the characteristics of more spinning sites, thinner metal wires, higher field intensity, small spinning voltage, low energy consumption, high yield, thinner and more uniform fibers and safer spinning process.
Description
Technical Field
The invention belongs to the field of electrostatic spinning heads, and particularly relates to a secondary fractal spiral electrostatic spinning head and a tertiary fractal spiral electrostatic spinning head.
Background
Electrostatic spinning is a method for preparing nanofibers by drawing polymer solution or melt through electric field force generated by a high-voltage direct-current power supply, is one of the most effective technologies for preparing nanofibers at present, and has been widely researched in recent years. It has the advantages of low cost, simplicity, and capability of processing most polymers. The product fineness of the fiber is between nanometer and micron, and the fiber is deposited on a receiving device in a disordered state to form a non-woven fabric-like micro-nano fiber mesh film which can be used in a plurality of high-tech fields such as filter materials, biomedical materials, chemical sensors, battery diaphragms and the like.
At present, the large-scale electrostatic spinning technology is mainly divided into two types: one is a needleless electrospinning technique and the other is a multi-needle electrospinning technique. The roller type needle-free electrostatic spinning technology has the advantages that the needle blockage problem of needle type electrostatic spinning does not exist, the yield is high, but the problems of high required voltage, high energy consumption, air breakdown and the like are easily caused; the required voltage is lower, controllable liquid supply and fiber are thinner in the multi-needle electrostatic spinning process, but the problems of easy blockage of the needle, low yield, serious edge effect and the like exist. At present, the attractive large-scale needleless electrostatic spinning technology is spiral coil electrostatic spinning and spiral blade electrostatic spinning developed on the basis of the spiral coil electrostatic spinning; the former has a lower yield than the latter, but requires a lower voltage, the latter has a higher yield but requires a higher voltage, consumes a higher power and is liable to cause air breakdown.
Disclosure of Invention
In order to solve the technical problems, the invention provides a two/three-time fractal spiral structure electrostatic spinning head based on a fractal dimension theory.
In order to achieve the above object, one technical solution of the present invention is as follows: a secondary fractal spiral electrostatic spinning head is formed by winding a primary spiral on the basis of a spiral track, is used as a needle-free electrostatic spinning head, and is used for spinning upwards and carrying out liquid rotation.
Specifically, the metal wire radius R of the primary spiral electrostatic spinning head0Not exceeding 1 mm.
Specifically, the secondary fractal spiral thread pitch H of the secondary fractal spiral electrostatic spinning head1Is composed of
20-120mm。
Specifically, the secondary fractal spiral radius R of the secondary fractal spiral structure2Is 10-250 mm.
Specifically, the radius R of the primary spiral of the secondary fractal spiral electrostatic spinning head1Is 2-20 mm.
In particular, the primary spiral coil M of the secondary fractal spiral structure1Not less than 20 turns.
Preferably, R1>R0；R2>R1+R0；H1>2(R0+R1)/0.9；R0<0.9π(R2-R1)/M1。
The invention provides a three-time fractal spiral electrostatic spinning head based on a fractal dimension theory.
In order to achieve the above object, the technical solution provided by the present invention is as follows: the triple fractal spiral electrostatic spinning head is of a triple fractal spiral structure formed by spirally winding the double fractal spiral electrostatic spinning head.
Specifically, the secondary spiral winding number M of the cubic fractal spiral line structure32Not less than 20 turns.
Specifically, the radius R of the cubic fractal spiral structure3Is 20-500 mm.
Specifically, the triple fractal spiral pitch H of the triple fractal spiral structure2Is 30-300 mm.
Preferably, wherein R1>R0；R2>R1+R0；R3>R1+R2+R0；H2>2(R0+R2+R1)/0.9；R1<0.9π(R3-R2)/M32；R0<0.9π(R2-R1)/M1。
The invention has the beneficial effects that: the secondary fractal spiral electrostatic spinning head and the tertiary fractal spiral electrostatic spinning head provided by the invention have the characteristics of more spinning sites, small metal wire radius, small required voltage, small interference between field intensities, high yield, high field intensity, low energy consumption, uniform field intensity and uniform fiber fineness.
Drawings
FIG. 1 is a schematic view of a structure of a conventional one-time (fractal) spiral electrospinning head (left: front view; right: side view);
FIG. 2 is a schematic structural view of a second fractal spiral electrospinning head according to the present invention (left: front view; right: side view);
fig. 3 is a schematic view of the structure of a triple fractal spiral electrospinning head according to the present invention (left: front view; right: side view).
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Wherein R is0Is the wire radius, R1Helical radius of a fractal spiral, H0The pitch of a fractal spiral, F1A fractal primary spiral representing a primary spiral electrostatic spinning head;
H1the pitch of the quadric fractal spiral, R2The radius of the central axis of the secondary fractal spiral; because of the secondary fractal spiral, the inner and outer side screw pitches of the primary fractal spiral are not equal (H)0-in<H0-out) So that the number of turns of the winding is used to define the pitch H of the fractal spiral0(ii) a For fixed length spinnerets, the number of turns defines the pitch of the inner and outer sides of the primary helix, F2Represents a quadratic fractal spiral;
H2the pitch of the cubic fractal spiral, R3Is the central axis radius of the cubic fractal spiral, M2Number of turns of winding of cubic fractal spiral, M1Number of turns of winding of quadratic fractal spiral, F3Representing a cubic fractal spiral.
Interpretation of terms
The term of the one-time fractal spiral structure (the structure of which is shown in fig. 1) is defined as follows:
pitch H of first fractal spiral0: means a radius R0When a mass point on the primary fractal spiral of the metal wire is coiled by 360 degrees from the point to another point along a spiral track, the linear distance between the two points is formed, the formed structure is called a primary fractal spiral structure unit, and the central axis of the corresponding primary fractal spiral is set as A0(see FIG. 1 for details);
central axis radius R of first fractal spiral1: is the vertical distance from the central point of the circular section of the metal wire of the first fractal spiral to the central axis of the first fractal spiral. Because the diameter of the metal wire is 2R0The inner and outer diameters of the formed primary fractal spiral are different (the inner diameter is equal to 2R)1-2R0An outer diameter of 2R or more1+2R0) The radius of the first-order fractal spiral is defined as R1。
The term of the quadric fractal spiral structure (the structure of which is shown in fig. 2) is defined as follows:
second order fractal spiral pitch H1: fractal central axis A0Along the quadratic fractal central axis A1Helically wound, diameter R0A mass point on the primary fractal spiral of the metal wire, from which point along the primary fractal central axis A0When the fractal spiral is coiled and spirally coiled for 360 degrees along the central axis of the quadratic fractal spiral at the same time to reach another point, the formed structure is called a quadratic fractal spiral structure unit, the central axis of the corresponding quadratic fractal spiral is set as A1(description FIG. 2);
spiral winding number M of secondary fractal spiral1The number of the first fractal spiral structure units contained in one second fractal spiral structure unit in the second fractal spiral is indicated;
central axis radius R of secondary fractal spiral2The distance between the central axis of the primary fractal spiral structure of the secondary fractal spiral structure and the central axis of the secondary fractal spiral structure is referred to;
central axis radius R of first fractal spiral1The definition is the same as the previous definition;
first fractal spiral pitch H0As before.
The term of the cubic fractal spiral structure (the structure of which is shown in fig. 3) is defined as follows:
cubic fractal spiral pitch H1: fractal central axis A0Along the quadratic fractal central axis A1Spirally winding and secondarily fractal central axis A1Along the cubic fractal central axis A2Helically wound, diameter R0A mass point on the primary fractal spiral of the metal wire, from which point along the primary fractal central axis A0Coiled and simultaneously along the quadric fractal central axis A1The spiral is coiled for 360 degrees along the central axis of the cubic fractal line to reach the other point, the linear distance formed between the two points is called a structural unit of the cubic fractal line, and the central axis of the corresponding cubic fractal line is set as A2(instruction FIG. 3);
spiral winding number M of cubic fractal spiral2The number of the first fractal spiral structural units contained in one cubic fractal spiral structural unit in the cubic fractal spiral is referred to;
radius of cubic fractal spiral R3The vertical distance from the central axis of the cubic fractal spiral structure to the central axis of the secondary spiral is indicated;
the central axis radius R of the secondary fractal spiral contained in the tertiary fractal spiral2Spiral winding number M of secondary fractal spiral1Pitch H of the quadric fractal spiral1Radius R of central axis of once-fractal spiral1The definition is the same as the previous definition;
spiral winding number M of secondary fractal spiral32The number of secondary fractal spiral structure units contained in one tertiary fractal spiral structure unit in the tertiary fractal spiral is indicated;
example 1
As shown in fig. 2, the present embodiment provides a secondary fractal spiral electrostatic spinning head, which is a secondary fractal spiral structure formed by spirally winding a primary fractal spiral electrostatic spinning head, and is made of spring steel.
Wherein the radius of the quadric fractal spiral R210mm, primary helix radius R1Is 2mm, and the number of secondary fractal spiral winding turns is M140 turns, the pitch H of the secondary fractal spiral120mm, wire R0The radius is 0.1 mm.
Example 2
The difference from example 1 is that: second order fractal spiral radius R240mm, primary helix radius R1Is 5mm, and the number of secondary fractal spiral winding turns is M150 turns, the pitch H of the secondary fractal spiral1Is 50mm, wire R0The radius is 0.25 mm.
Example 3
The difference from example 1 is that: second order fractal spiral radius R2250mm, primary helix radius R120mm, and the number of secondary fractal spiral winding turns is M160 turns, the pitch H of the secondary fractal spiral1120mm, wire R0The radius is 1 mm.
Example 4
As shown in fig. 3, this embodiment provides a cubic fractal spiral electrospinning head, which is a cubic fractal spiral structure formed by spirally winding a quadratic fractal spiral electrospinning head, and is made of spring steel, wherein the radius R of the cubic fractal spiral is320mm, second fractal spiral radius R25mm, primary helix radius R1Is 2mm, and the number of secondary fractal spiral winding turns is M3220 turns, and one fractal spiral winding turns number M130 turns, triple fractal spiral pitch H230mm, wire R0The radius is 0.1 mm.
Example 5
The difference from example 4 is that: radius of cubic fractal spiral R3Is 100mm, and the radius R of the second fractal spiral216mm, primary spiral radius R1Is 4mm, and the number of secondary fractal spiral winding turns is M3230 turns, three times of fractal spiral winding turns M160 turns, triple fractal spiral pitch H2150mm, wire R0The radius is 0.4 mm.
Example 6
The difference from example 4 is that: radius of cubic fractal spiral R3Is 500mm, and the radius R of the second fractal spiral2Is 80mm, the radius of the primary spiral R1Is 10mm, and has a secondary fractal spiral diskNumber of turns is M32Is 40 turns, and the number of turns M of the three-time fractal spiral winding1300 turns, triple fractal spiral pitch H2300mm, wire R0The radius is 0.3 mm.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A secondary fractal spiral electrostatic spinning head is characterized in that a secondary fractal spiral structure is formed by spirally winding a primary spiral electrostatic spinning head.
2. The quadric fractal spiral electrospinning head of claim 1, wherein the wire radius R of the primary spiral electrospinning head0Not more than 1 mm; the pitch H of the secondary fractal spiral structure1Is 20-120 mm.
3. The quadric fractal spiral electrospinning head of claim 2, wherein the central axis radius R of the quadric fractal spiral structure210-250mm, the primary spiral radius R of the secondary fractal spiral structure1Is 2-20 mm.
4. The quadric fractal spiral electrospinning head of claim 3, wherein the quadric fractal spiral structure has a fractal spiral winding number M1Not less than 20 turns.
5. The quadric fractal spiral electrospinning head of claim 4, wherein R is1>R0；R2>R1+R0；H1>2(R0+R1)/0.9；R0<0.9π(R2-R1)/M1。
6. A triple fractal spiral electrospinning head characterized by a triple fractal spiral structure spirally wound by the double fractal spiral electrospinning head of any of claims 1 to 5.
7. The cubic fractal spiral electrospinning head of claim 6, wherein the pitch H of the cubic fractal spiral structure230-300mm, the central axis radius R of the cubic fractal spiral structure3Is 20-500 mm.
8. The cubic fractal spiral electrospinning head of claim 7, wherein the cubic fractal spiral structure has a secondary fractal spiral winding number of M32Not less than 20 turns.
9. The triple fractal spiral electrospinning head of claims 6 to 8, wherein R is1>R0；R2>R1+R0；R3>R1+R2+R0；H2>2(R0+R2+R1)/0.9；R1<0.9π(R3-R2)/M32；R0<0.9π(R2-R1)/M1。
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Citations (7)
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| JP2008050719A (en) * | 2006-08-25 | 2008-03-06 | Japan Vilene Co Ltd | Polymer solution feeding member, electrostatic spinning apparatus and method for producing nonwoven fabric by electrostatic spinning |
| CN102216502A (en) * | 2008-10-17 | 2011-10-12 | 迪肯大学 | Electrostatic spinning assembly |
| US20140377391A1 (en) * | 2013-06-25 | 2014-12-25 | Paul Kaohing Lee | Electro Fiber Pulling Apparatus with Spiral Rod |
| CN107620127A (en) * | 2016-07-14 | 2018-01-23 | 天津工业大学 | A kind of needle-less electrostatic spinning component based on fractal structure |
| CN209243249U (en) * | 2018-12-04 | 2019-08-13 | 广东工业大学 | A kind of needleless spinning equipment based on fractal principle |
| CN111286793A (en) * | 2020-04-03 | 2020-06-16 | 浙江工业大学之江学院 | Multi-spiral-line electrostatic spinning device |
| CN212451764U (en) * | 2020-04-03 | 2021-02-02 | 浙江工业大学之江学院 | Multi-spiral-line electrostatic spinning device |
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2022
- 2022-01-07 CN CN202210015130.7A patent/CN114411272B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008050719A (en) * | 2006-08-25 | 2008-03-06 | Japan Vilene Co Ltd | Polymer solution feeding member, electrostatic spinning apparatus and method for producing nonwoven fabric by electrostatic spinning |
| CN102216502A (en) * | 2008-10-17 | 2011-10-12 | 迪肯大学 | Electrostatic spinning assembly |
| US20140377391A1 (en) * | 2013-06-25 | 2014-12-25 | Paul Kaohing Lee | Electro Fiber Pulling Apparatus with Spiral Rod |
| CN107620127A (en) * | 2016-07-14 | 2018-01-23 | 天津工业大学 | A kind of needle-less electrostatic spinning component based on fractal structure |
| CN209243249U (en) * | 2018-12-04 | 2019-08-13 | 广东工业大学 | A kind of needleless spinning equipment based on fractal principle |
| CN111286793A (en) * | 2020-04-03 | 2020-06-16 | 浙江工业大学之江学院 | Multi-spiral-line electrostatic spinning device |
| CN212451764U (en) * | 2020-04-03 | 2021-02-02 | 浙江工业大学之江学院 | Multi-spiral-line electrostatic spinning device |
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