CN109371477B - An electrospinning nozzle - Google Patents
An electrospinning nozzle Download PDFInfo
- Publication number
- CN109371477B CN109371477B CN201811187040.6A CN201811187040A CN109371477B CN 109371477 B CN109371477 B CN 109371477B CN 201811187040 A CN201811187040 A CN 201811187040A CN 109371477 B CN109371477 B CN 109371477B
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- Prior art keywords
- cavity
- nozzle
- end cavity
- liquid inlet
- length
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- 238000001523 electrospinning Methods 0.000 title abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 210000000683 abdominal cavity Anatomy 0.000 claims abstract description 8
- 238000010041 electrostatic spinning Methods 0.000 claims description 19
- 238000009987 spinning Methods 0.000 abstract description 21
- 239000007787 solid Substances 0.000 abstract description 19
- 239000002086 nanomaterial Substances 0.000 abstract description 12
- 239000000835 fiber Substances 0.000 abstract description 11
- 238000004140 cleaning Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000004744 fabric Substances 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 229920000642 polymer Polymers 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 239000002121 nanofiber Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
本发明涉及一种静电纺丝喷头，尤其是涉及到一种使一维固体纳米材料在纤维中顺向于纤维轴向方向排列的静电纺丝喷头。静电纺丝喷头由进液口、腹腔和喷嘴构成，所述的腹腔由上端腔体和下端腔体构成，上端腔体内壁面呈柱面状，下端腔体内壁面呈弧面状，喷嘴位于下端腔体下端，上端腔体和下端腔体之间螺纹连接，进液口位于上端腔体的上端面上，进液口、上端腔体和下端腔体、喷嘴的中心轴一致。本静电纺丝喷头力学性能优异，可以克服一维固体纳米材料在纺丝过程中未能与纤维顺向排列的困难，发明的核心是实现一维固体纳米材料在静电纺纳米纤维中顺向排布。本发明设计合理，结构简单，制作一体成型，成本低，便于检测维修与清洗。
The invention relates to an electrospinning nozzle, in particular to an electrospinning nozzle capable of arranging one-dimensional solid nanomaterials in fibers along the axial direction of the fibers. The electrospinning nozzle is composed of a liquid inlet, an abdominal cavity and a nozzle. The abdominal cavity is composed of an upper cavity and a lower cavity. The inner wall of the upper cavity is cylindrical, the inner wall of the lower cavity is cambered, and the nozzle is located in the lower cavity. The lower end of the body, the upper end cavity and the lower end cavity are threadedly connected, the liquid inlet is located on the upper end surface of the upper end cavity, and the central axes of the liquid inlet, the upper end cavity and the lower end cavity and the nozzle are consistent. The electrospinning nozzle has excellent mechanical properties, and can overcome the difficulty that one-dimensional solid nanomaterials cannot be aligned with the fibers during the spinning process. cloth. The invention has reasonable design, simple structure, integral molding, low cost, and is convenient for detection, maintenance and cleaning.
Description
Technical Field
The invention relates to an electrostatic spinning nozzle, in particular to an electrostatic spinning nozzle which enables one-dimensional solid nano materials to be arranged in fibers along the axial direction of the fibers, and belongs to the textile apparatus.
Background
In order to meet the functional requirements of different fields on the nano-fiber, electrostatic spinning nozzles with various structures have been designed and developed, from a common needle tube type electrostatic spinning nozzle, a coaxial multi-core electrostatic spinning nozzle, a parallel electrostatic spinning nozzle and the like, and the electrostatic spinning nozzles with the structures can be used for preparing the composite nano-fiber with various structural characteristics consisting of various materials.
Chinese patent publication No.: CN203284511U, invention No. 11/13/2013, which discloses a multi-fluid composite electrospinning nozzle for mixing multi-fluid spinning. However, the invention is only simple composite spinning, the internal structure of the generated fiber is irregular, and the effect of axial orientation arrangement of the one-dimensional solid nano-substances in the fiber is not achieved.
Chinese patent publication No.: CN203451653U, invention No. 02/26 of published 2014, which discloses a sandwich-type electrospinning spray head, comprising a hollow spray pipe, wherein at least one hollow inner spray pipe is concentrically nested in the spray pipe, and the spun fiber structure is an insoluble non-deterministic mixed fiber yarn and cannot enable one-dimensional solid nano-materials and fibers to form a coaxial sheath-core structure.
For structural reasons, when the existing various electrostatic spinning nozzles spin the composite spinning solution containing the one-dimensional solid nano-materials, the one-dimensional solid nano-materials can not be oriented and arranged in the axial direction of the electrostatic spinning nano-fibers.
Disclosure of Invention
In view of the above problems, the present invention aims to provide an electrostatic spinning nozzle capable of blending one-dimensional solid nanomaterials and nanofibers, and axially orienting and arranging the one-dimensional solid nanomaterials in the fibers to form a sheath-core structure.
In order to achieve the purpose, the technical solution of the invention is as follows:
an electrostatic spinning nozzle comprises a liquid inlet, an abdominal cavity and a nozzle, wherein the abdominal cavity comprises an upper end cavity and a lower end cavity, the inner wall of the upper end cavity is in a cylindrical surface shape, the inner wall of the lower end cavity is in an arc surface shape, the nozzle is positioned at the lower end of the lower end cavity, the upper end cavity and the lower end cavity are in threaded connection, the liquid inlet is positioned on the upper end surface of the upper end cavity, and the liquid inlet, the upper end cavity, the lower end cavity and the central axis of the nozzle are consistent.
The lower end cavity is a closed three-dimensional space formed by the hyperbolic curve rotating for one circle around the central axis, a plane formed by the hyperbolic curve rotating for one circle around the central axis is the inner wall surface of the lower end cavity, the eccentricity of the hyperbolic curve is 1-1.414, and the solid axis of the hyperbolic curve, namely the inner diameter of the thin neck of the lower end cavity is 0.8 times of the inner diameter of the outlet of the nozzle.
The inner diameter of the nozzle is 0.33-0.90mm, the length of the nozzle is 1.5-2.5 times of the inner diameter, the length of the lower end cavity is 2.5 times of the length of the nozzle, and the length of the upper end cavity is 0.5 times of the length of the lower end cavity.
By adopting the technical scheme, the inner wall surface of the upper end cavity adopted by the electrostatic spinning nozzle is a cylindrical surface, the inner wall surface of the lower end cavity is an arc surface, the arc surface is formed by rotating a hyperbolic curve around a central shaft, the eccentricity of the hyperbolic curve is 1-1.414, a spinning solution flows through the lower end cavity from the upper end cavity and then flows out from the nozzle, the liquid level in the lower end cavity is gradually reduced in the flow direction of the spinning solution, the reduction trend is consistent with the morphological characteristics of the lower end cavity, the eccentricity of 1-1.414 ensures that the shearing force generated in the solution flow process enables the one-dimensional solid particles in the spinning solution dispersed with the one-dimensional solid particles to be oriented and arranged in the flow direction of the spinning solution, the inner wall surface of the lower end cavity is arc surface, the shearing resistance borne by the spinning solution flowing in the lower end cavity is gradually increased along with the arc surface of the inner wall, and the hydraulic pressure of. The inner diameter of the joint of the lower end cavity and the nozzle is 0.8 times of the inner diameter of the nozzle outlet, the spinning solution flows from a small opening of the joint of the lower end cavity and the nozzle through the large caliber of the nozzle outlet to further reduce the pressure of the spinning solution at the nozzle outlet, so that the phenomenon that the spinning solution expands greatly at the nozzle outlet to damage the oriented arrangement of the one-dimensional solid particles in the flowing direction of the spinning solution when the spinning solution flows out of the nozzle outlet due to too large pressure change of the spinning solution is effectively avoided, and the limitation that the inner diameter of the nozzle is 0.33-0.90mm ensures that the electrostatic spinning head can be applied to electrostatic spinning of the spinning solution dispersed with the one-dimensional solid particles; the limitation that the nozzle length is 1.5-2.5 times the diameter is to ensure that the dope flowing into the nozzle does not increase the dope pressure inside the nozzle due to the drag effect of the nozzle channel wall on the dope, and that the change in the dope pressure at the nozzle outlet is too large to disrupt the alignment of the one-dimensional solid particles in the flow direction of the dope. The length of the upper end cavity is 0.5 times of the length of the lower end cavity, so that sufficient solution is supplied into the cavity, the length of the lower end cavity is 2.5 times of the length of the nozzle, the hydraulic pressure of the liquid flowing out of the cavity is effectively controlled, and one-dimensional solid particles in the spinning solution can be arranged in an oriented mode in the flowing direction of the spinning solution in the flowing process of the spinning solution.
The spinning solution with the one-dimensional solid nano-materials uniformly dispersed is spun by the electrostatic spinning nozzle, so that the uniform axial orientation arrangement of the one-dimensional solid nano-materials in the fiber can be realized.
The invention has the advantages of reasonable design, simple structure, integrated manufacturing, low cost and convenient detection, maintenance and cleaning.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The invention is explained in further detail below with reference to the drawings.
Referring to fig. 1, an electrospinning head includes a nozzle 1, an abdominal cavity, and a liquid inlet 4. The abdominal cavity comprises an upper end cavity 3 and a lower end cavity 2, the inner wall of the upper end cavity is in a cylindrical surface shape, the inner wall of the lower end cavity 2 is in an arc surface shape, the nozzle 1 is positioned at the lower end of the lower end cavity 2, the upper end cavity 3 is in threaded connection with the lower end cavity 2, the liquid inlet 4 is positioned on the upper end surface of the upper end cavity 3, and the central axes of the liquid inlet 4, the upper end cavity 3, the lower end cavity 2 and the nozzle 1 are consistent.
The lower end cavity 2 is a closed three-dimensional space formed by one circle of hyperbolic curve rotation around a central axis, a plane formed by one circle of hyperbolic curve rotation around the central axis is the inner wall surface of the lower end cavity 2, the eccentricity of the hyperbolic curve is 1-1.414, and the solid axis of the hyperbolic curve, namely the inner diameter of a thin neck of the lower end cavity 2 is 0.8 times of the inner diameter of an outlet of the nozzle 1.
The inner diameter of the nozzle 1 is 0.33-0.90mm, the nozzle) is 1.5-2.5 times of the inner diameter, the length of the lower end cavity 2 of the upper end cavity 3 is 2.5 times of the length of the nozzle 1, and the length of the lower end cavity 2 is 0.5 times of the length of the lower end cavity 2.
In the electrostatic spinning process, polymer liquid is added into the upper end cavity 3, and in the solution flowing process, the shearing force inside the fluid in the lower end cavity 2 acts to enable the one-dimensional nano materials in the spinning solution to be extruded under pressure, and the one-dimensional nano materials in the solution are arranged in the tip direction of the lower end cavity under the shearing force. A high-voltage electric field is connected between the liquid inlet 4 and the receiving device, and charges of the same polarity can be accumulated in the polymer solution. An electric field is generated opposite to the surface tension due to the mutual repulsion of like charges and contraction of surface charges towards the opposite electrode. When the electric field is equal to the surface tension of the polymer solution, the polymer solution is balanced at the nozzle and the voltage is increased, and when the electric field is increased to overcome the surface tension of the polymer solution, the polymer solution is jetted from the nozzle 1 to form a polymer jet.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811187040.6A CN109371477B (en) | 2018-10-12 | 2018-10-12 | An electrospinning nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811187040.6A CN109371477B (en) | 2018-10-12 | 2018-10-12 | An electrospinning nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109371477A CN109371477A (en) | 2019-02-22 |
| CN109371477B true CN109371477B (en) | 2021-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811187040.6A Expired - Fee Related CN109371477B (en) | 2018-10-12 | 2018-10-12 | An electrospinning nozzle |
Country Status (1)
| Country | Link |
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| CN (1) | CN109371477B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114351265B (en) * | 2021-11-19 | 2023-06-02 | 东华大学 | Electrostatic spinning device for preparing flexible ceramic nanofiber in large scale |
| CN114369878B (en) * | 2021-11-19 | 2023-06-02 | 东华大学 | A large-scale continuous manufacturing device for flexible ceramic nanofibers |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1660702A1 (en) * | 1967-10-14 | 1972-03-09 | Schwarza Chemiefaser | Nozzle plate for the production of multi-component threads and fibers |
| JP2003089917A (en) * | 2001-09-19 | 2003-03-28 | Toray Ind Inc | Method for producing thermoplastic synthetic fiber |
| CN1415026A (en) * | 1999-11-27 | 2003-04-30 | 斯宾诺克斯有限公司 | Apparatus and method for forming materials |
| CN1711374A (en) * | 2002-11-14 | 2005-12-21 | 斯宾泰克工程股份有限公司 | Apparatus and method for forming materials |
| CN102953129A (en) * | 2012-11-27 | 2013-03-06 | 北京化工大学 | Linear type efficient electrostatic spinning spray nozzle |
| CN105734693A (en) * | 2016-02-02 | 2016-07-06 | 嘉兴学院 | Double-electrode electrostatic spinning device and using method thereof |
-
2018
- 2018-10-12 CN CN201811187040.6A patent/CN109371477B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1660702A1 (en) * | 1967-10-14 | 1972-03-09 | Schwarza Chemiefaser | Nozzle plate for the production of multi-component threads and fibers |
| CN1415026A (en) * | 1999-11-27 | 2003-04-30 | 斯宾诺克斯有限公司 | Apparatus and method for forming materials |
| JP2003089917A (en) * | 2001-09-19 | 2003-03-28 | Toray Ind Inc | Method for producing thermoplastic synthetic fiber |
| CN1711374A (en) * | 2002-11-14 | 2005-12-21 | 斯宾泰克工程股份有限公司 | Apparatus and method for forming materials |
| CN102953129A (en) * | 2012-11-27 | 2013-03-06 | 北京化工大学 | Linear type efficient electrostatic spinning spray nozzle |
| CN105734693A (en) * | 2016-02-02 | 2016-07-06 | 嘉兴学院 | Double-electrode electrostatic spinning device and using method thereof |
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| Publication number | Publication date |
|---|---|
| CN109371477A (en) | 2019-02-22 |
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Granted publication date: 20210709 |