CN111020719A - Device and method for preparing nanofiber membrane with controllable thickness - Google Patents
Device and method for preparing nanofiber membrane with controllable thickness Download PDFInfo
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- CN111020719A CN111020719A CN201911290218.4A CN201911290218A CN111020719A CN 111020719 A CN111020719 A CN 111020719A CN 201911290218 A CN201911290218 A CN 201911290218A CN 111020719 A CN111020719 A CN 111020719A
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- nanofiber membrane
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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
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- Length Measuring Devices By Optical Means (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The invention belongs to the field of nanofiber membrane preparation devices, and particularly relates to a device and a method for preparing a nanofiber membrane with controllable thickness. The light transmittance of the nanofiber membrane is determined through the light intensity received by the light intensity sensor, so that the thickness of the nanofiber membrane is controlled; the light intensity signal is used for controlling the nanofiber membrane, and the hysteresis of the light intensity signal is small, so that the dynamic performance is good, the real-time control can be realized, and the actual thickness of the nanofiber membrane can be accurately controlled.
Description
Technical Field
The invention belongs to the field of nanofiber membrane preparation devices, and particularly relates to a device and a method for preparing a nanofiber membrane with controllable thickness.
Background
A nanofiber is a linear material with a diameter on the nanometer scale and a large length. Because the diameter of the nano-fiber is on the nano scale, nano-fibers made of different materials have a plurality of special properties, and the preparation and application of the nano-fibers are widely concerned. The electrostatic spinning method is the simplest and most effective method for preparing the nano fibers, the electrostatic spinning nano fibers have the advantages of large specific surface area, high porosity and the like, and the electrostatic spinning method has great potential utilization value in the fields of flexible sensors, energy materials, biomedicine and the like.
According to the existing electrostatic spinning technology, the precision control of the thickness of the nanofiber membrane is difficult to realize. When the existing technology and equipment are applied to preparing the fiber membrane, the thickness of the nanofiber is usually judged through observation, but the nanofiber prepared by the electrostatic spinning method is fluffy before treatment, the actual thickness of the nanofiber is difficult to observe by human eyes, and the diameter of the nanofiber is in a nanometer level, so that the nanofiber membrane cannot be observed by human eyes and the thickness of the nanofiber membrane cannot be controlled even when the nanofiber membrane with small thickness is prepared. In addition, the thickness of the nanofiber membrane is difficult to control through the flow of the micro pump and the spinning time, on one hand, the precision requirement on the micro pump is high, and the cost is greatly increased; on the other hand, influence factors of the electrostatic spinning process are diverse, the dynamic performance of the nanofiber membrane controlled by the method is poor, real-time control cannot be realized, and the thickness of the nanofiber membrane is difficult to accurately control. Therefore, it is necessary to provide a device and a method for preparing a nanofiber membrane with a controllable thickness, which has a simple structure and stable performance.
Disclosure of Invention
In order to solve the problems, the invention provides a device and a method for preparing a nanofiber membrane with controllable thickness.
The technical scheme of the invention is as follows:
a device for preparing a nanofiber membrane with controllable thickness comprises a supporting plate 1, an annular light source 2, a spinning needle 3, a quartz plate 4, an ITO electrode plate 5, a light intensity sensor 6, a base 7, a microprocessor 9, a high-voltage power supply 10 and a micropump 11;
the base 7 comprises a bottom plate part and a stand column part, and the stand column is vertically fixed on the bottom plate; the ITO electrode plate 5 is supported and fixed on the bottom plate through a plurality of support columns, a gap is reserved between the ITO electrode plate 5 and the bottom plate, the light intensity sensor 6 is installed on the bottom plate and is positioned below the ITO electrode plate 5, the quartz plate 4 is fixed on the upper surface of the ITO electrode plate 5, and the quartz plate 4 is positioned right above the light intensity sensor 6;
one end of the supporting plate 1 is fixed on the upright post of the base 7, and the other end of the supporting plate is provided with a through hole for mounting the spinning needle 3, wherein the spinning needle 3 is vertically downward; the annular light source 2 is an LED light source with constant light intensity and is arranged on the lower surface of the supporting plate 1, the spinning needle 3 is positioned in the center of the annular light source 2, the annular light source 2 and the spinning needle 3 are positioned right above the quartz plate 4, and the spinning needle 3 and a detecting head of the light intensity sensor 6 are positioned on the same straight line;
the high-voltage power supply 10 and the microprocessor 9 are arranged on the bottom plate of the base 7; the anode and the cathode of the high-voltage power supply 10 are respectively connected with the spinning needle 3 and the ITO electrode plate 5 through leads 13; the micro pump 11 and the light intensity sensor 6 are both connected with the microprocessor 9 through a data line 8; the micro pump 11 is connected with the spinning needle 3 through a delivery pipe 12 and is used for providing spinning solution.
A method for preparing a nanofiber membrane with controllable thickness adopts the device and comprises the following specific steps:
The invention has the beneficial effects that:
1. the device has simple structure and stable performance, the control parameters are only related to the light intensity detected by the light intensity sensor, and the interference of other physical quantities such as electric field intensity, temperature and humidity is small.
2. The invention controls the nanofiber membrane by the light intensity signal, has better dynamic performance because of small hysteresis of the light intensity signal, can realize real-time control, and can accurately control the actual thickness of the nanofiber membrane.
3. The light transmittance of the nanofiber membrane is determined through the light intensity received by the light intensity sensor, so that the thickness of the nanofiber membrane is controlled, the measurement process is non-contact measurement, and the nanofiber membrane cannot be damaged at all.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention.
FIG. 2 is a schematic view of the mounting positions of the ring light source and the spinning nozzle tip.
In the figure: the device comprises a support plate 1, an annular light source 2, a spinning needle 3, a quartz plate 4, an ITO electrode plate 5, a light intensity sensor 6, a base 7, a data line 8, a microprocessor 9, a high-voltage power supply 10, a micropump 11, a delivery pipe 12 and a lead 13.
Detailed Description
The following further describes a specific embodiment of the present invention with reference to the drawings and technical solutions.
As shown in fig. 1 and 2, an apparatus for preparing a nanofiber membrane with a controllable thickness comprises: the device comprises a supporting plate 1, an annular light source 2, a spinning needle 3, a quartz plate 4, an ITO electrode plate 5, a light intensity sensor 6, a base 7, a data line 8, a microprocessor 9, a high-voltage power supply 10, a micro pump 11, a delivery pipe 12 and a lead 13. The annular light source 2 is arranged on the lower surface of the supporting plate 1, the supporting plate 1 is arranged on an upright post of the base 7, and the spinning needle 3 is arranged on a through hole of the supporting plate 1 and is positioned at the center of the annular light source 2; the quartz plate 4 is arranged on the upper surface of the ITO electrode plate 5, the ITO electrode plate 5 is arranged on the bottom plate of the base 7 and is supported by the supporting columns, so that a gap is reserved between the ITO electrode plate 5 and the bottom plate of the base 7 and is used for installing the light intensity sensor 6; the microprocessor 9 is connected with the light intensity sensor 6 through a data line 8, the micropump 11 is connected with the microprocessor 9 through the data line 8, the micropump 11 is connected with the spinning needle 3 through a delivery pipe 12, and the anode and the cathode of the high-voltage power supply 10 are respectively connected with the spinning needle 3 and the ITO electrode plate 5 through leads 13.
Dark turn high requirement of the light intensity sensor 6: the device is arranged under the ITO electrode plate 5 and is vertically arranged, the inclination angle is not more than 2 degrees, the detecting head points to the direction of the ITO electrode plate 5, and the deviation between the center of the detecting head and the center of the spinning needle head 3 in the horizontal direction is not more than 2 mm.
The light transmittance of the quartz plate 4 is 97 +/-0.5%; the light transmittance of the ITO electrode plate 5 is 90 +/-0.5%. In this embodiment, the thickness of the quartz plate 4 is 3mm, and the thickness of the ITO electrode plate 5 is 3 mm.
The supporting plate 1 and the base 7 are both made of insulating materials; in the embodiment, the thickness of the circular part at the front end of the supporting plate 1 is 6-8mm, the thickness of the cuboid part is 10-12mm, and the length and the width of the column part of the base 7 are both 16-20 mm.
When the device is used, the micro pump 11 conveys the spinning solution to the spinning needle 3 through the conveying pipe, and the spinning solution is gradually stretched into a cone shape under the action of a high-voltage electric field generated between the spinning needle 3 and the ITO electrode plate 5. The solution is solidified in the electric field with the volatilization of the solvent to form a nanofiber film on the quartz plate 4. The annular light source 2 penetrates through the nanofiber membrane, the high quartz plate 4 and the ITO electrode plate 5 with good light transmittance and is received by the light intensity sensor 6, the intensity of a light intensity signal received by the light intensity sensor 6 is related to the total light transmittance of the nanofiber membrane, namely, the thickness, when the thickness of the nanofiber membrane reaches a set value, the light intensity signal reaches the set value, the microprocessor 9 controls the micro pump 11 to be closed, the spinning process is finished, the nanofiber membrane with the determined thickness is obtained, and the preparation process is carried out in the environment without wind and interference of a strong light source.
According to experimental calibration, when the thickness of the nanofiber membrane is 300nm, the total light transmittance of the nanofiber membrane, the quartz plate 4 and the ITO electrode plate 5 is 86%, and in the process that the thickness of the nanofiber membrane is increased from 300nm to 1200nm, the total light transmittance is reduced by 5.3% every time the thickness of the nanofiber membrane is increased by 300nm, so that the accurate corresponding relation between the thickness of the nanofiber membrane and the light transmittance, namely the light intensity signal value can be determined. According to the corresponding relationship, the thickness of the nanofiber membrane to be prepared is set in the microprocessor 9, and the microprocessor 9 can convert the corresponding light transmittance into the corresponding light intensity signal intensity.
Claims (6)
1. The device for preparing the nanofiber membrane with the controllable thickness is characterized by comprising a supporting plate (1), an annular light source (2), a spinning needle (3), a quartz plate (4), an ITO (indium tin oxide) electrode plate (5), a light intensity sensor (6), a base (7), a microprocessor (9), a high-voltage power supply (10) and a micropump (11);
the base (7) comprises a bottom plate part and a stand column part, and the stand column is vertically fixed on the bottom plate; the ITO electrode plate (5) is supported and fixed on the bottom plate through a plurality of supporting columns, a gap is reserved between the ITO electrode plate (5) and the bottom plate, the light intensity sensor (6) is installed on the bottom plate and located below the ITO electrode plate (5), the quartz plate (4) is fixed on the upper surface of the ITO electrode plate (5), and the quartz plate (4) is located right above the light intensity sensor (6);
one end of the supporting plate (1) is fixed on the upright post of the base (7), the end part of the other end of the supporting plate is provided with a through hole for installing the spinning needle head (3), and the spinning needle head (3) is vertically downward; the annular light source (2) is an LED light source with constant light intensity and is arranged on the lower surface of the supporting plate (1), the spinning needle head (3) is positioned at the center of the annular light source (2), the annular light source (2) and the spinning needle head (3) are positioned right above the quartz plate (4), and the spinning needle head (3) and a detecting head of the light intensity sensor (6) are positioned on the same straight line;
the high-voltage power supply (10) and the microprocessor (9) are arranged on the bottom plate of the base (7); the anode and the cathode of the high-voltage power supply (10) are respectively connected with the spinning needle head (3) and the ITO electrode plate (5) through leads (13); the micro pump (11) and the light intensity sensor (6) are connected with the microprocessor (9) through a data line (8); the micro pump (11) is connected with the spinning needle (3) through a delivery pipe (12) and is used for providing spinning solution.
2. The apparatus for preparing nanofiber membrane with controllable thickness as claimed in claim 1, wherein the light intensity sensor (6) is vertically installed, the inclination angle is not more than 2 °, the detecting head of the light intensity sensor (6) points to the direction of the ITO electrode plate (5), and the deviation between the center of the detecting head and the center of the spinning needle (3) in the horizontal direction is not more than 2 mm.
3. The apparatus for preparing nanofiber membrane with controllable thickness as claimed in claim 1 or 2, wherein the quartz plate (4) has thickness of 3mm and transmittance of 97 ± 0.5%, and the ITO electrode plate (5) has thickness of 3mm and transmittance of 90 ± 0.5%.
4. An apparatus for preparing nanofiber membranes with controllable thickness as claimed in claim 1 or 2 wherein the supporting plate (1) and the base (7) are made of insulating material.
5. An apparatus for preparing nanofiber membranes with controllable thickness as claimed in claim 3 wherein the supporting plate (1) and the base (7) are both made of insulating material.
6. A method for preparing a nanofiber membrane with controllable thickness using the device of claims 1-5, characterized by the steps of:
step 1, setting the thickness of a nanofiber membrane to be prepared in a microprocessor (9), and converting the microprocessor (9) into corresponding light transmittance according to the relation between the intensity of a light intensity signal and the thickness of the nanofiber membrane so as to convert the light transmittance into corresponding intensity of the light intensity signal;
step 2, connecting and electrifying the positive electrode and the negative electrode of a high-voltage power supply (10) with a spinning needle (3) and an ITO electrode plate (5) respectively, conveying a spinning solution to the spinning needle (3) through a delivery pipe (12) by a micro pump (11), spinning the spinning solution under the action of a high-voltage electric field generated between the spinning needle (3) and the ITO electrode plate (5), and finally solidifying the spinning solution to form a nanofiber membrane on a quartz plate (4); the annular light source (2) sequentially penetrates through the nanofiber membrane, the quartz plate (4) and the ITO electrode plate (5) and then is received by the light intensity sensor (6); when the thickness of the nanofiber membrane reaches a set value, the light intensity signal reaches the set value, the microprocessor (9) controls the micro pump (11) to be closed, and the spinning process is finished to obtain the nanofiber membrane with the determined thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911290218.4A CN111020719A (en) | 2019-12-16 | 2019-12-16 | Device and method for preparing nanofiber membrane with controllable thickness |
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| CN201911290218.4A CN111020719A (en) | 2019-12-16 | 2019-12-16 | Device and method for preparing nanofiber membrane with controllable thickness |
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| CN111020719A true CN111020719A (en) | 2020-04-17 |
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| KR100562018B1 (en) * | 2003-12-26 | 2006-03-16 | 김학용 | A method of manufacturing nano-fibers with excellent fiber formation |
| CN2833515Y (en) * | 2004-11-19 | 2006-11-01 | 华南理工大学 | Real-time optical film thickness monitoring apparatus |
| CN101568797A (en) * | 2007-02-20 | 2009-10-28 | 三菱重工业株式会社 | Wavelength selecting method, film thickness measuring method, film thickness measuring apparatus, and thin film silicon device manufacturing system |
| CN103743349A (en) * | 2013-12-30 | 2014-04-23 | 中国科学技术大学 | Method and device for measuring nano film |
| CN106498514A (en) * | 2017-01-05 | 2017-03-15 | 大连理工大学 | A kind of electrospinning process for preparing orientated nano fibers |
| CN108458662A (en) * | 2018-05-28 | 2018-08-28 | 北京化工大学 | A method of online thickness evenness detection being carried out to serialization nanofiber mats using specific light source |
| CN109563644A (en) * | 2016-04-21 | 2019-04-02 | 创新机械工程技术公司 | Electrostatic spinning apparatus and method |
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2019
- 2019-12-16 CN CN201911290218.4A patent/CN111020719A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100562018B1 (en) * | 2003-12-26 | 2006-03-16 | 김학용 | A method of manufacturing nano-fibers with excellent fiber formation |
| CN2833515Y (en) * | 2004-11-19 | 2006-11-01 | 华南理工大学 | Real-time optical film thickness monitoring apparatus |
| CN101568797A (en) * | 2007-02-20 | 2009-10-28 | 三菱重工业株式会社 | Wavelength selecting method, film thickness measuring method, film thickness measuring apparatus, and thin film silicon device manufacturing system |
| CN103743349A (en) * | 2013-12-30 | 2014-04-23 | 中国科学技术大学 | Method and device for measuring nano film |
| CN109563644A (en) * | 2016-04-21 | 2019-04-02 | 创新机械工程技术公司 | Electrostatic spinning apparatus and method |
| CN106498514A (en) * | 2017-01-05 | 2017-03-15 | 大连理工大学 | A kind of electrospinning process for preparing orientated nano fibers |
| CN108458662A (en) * | 2018-05-28 | 2018-08-28 | 北京化工大学 | A method of online thickness evenness detection being carried out to serialization nanofiber mats using specific light source |
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