CN105648548A - Tapered-bulge roller type electrostatic spinning device and method for preparing nanofiber membrane by adopting device - Google Patents
Tapered-bulge roller type electrostatic spinning device and method for preparing nanofiber membrane by adopting device Download PDFInfo
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- 239000002121 nanofiber Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000012528 membrane Substances 0.000 title claims abstract description 6
- 238000010041 electrostatic spinning Methods 0.000 title claims abstract 6
- 238000009987 spinning Methods 0.000 claims abstract description 46
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 230000005684 electric field Effects 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims 2
- 230000006641 stabilisation Effects 0.000 claims 1
- 238000011105 stabilization Methods 0.000 claims 1
- 238000003860 storage Methods 0.000 abstract description 25
- 238000001523 electrospinning Methods 0.000 description 18
- 239000000835 fiber Substances 0.000 description 6
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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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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- 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
- D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Nonwoven Fabrics (AREA)
Abstract
本发明公开了锥形凸起辊筒式静电纺丝装置，其中纺丝部分包括放置纺丝液的储液槽，储液槽相对的两个侧壁上安装有传动轴，储液槽内设置有辊筒，辊筒通过传动轴固定于储液槽内，传动轴分别与直流高压发生器负极和辊筒电机连接；辊筒上设置有锥形凸起；收集部分包括具有水平移动功能的收集卷帘，收集卷帘位于储液槽正上方。本发明还公开了采用上述装置制备纳米纤维膜的方法。相比光滑圆形辊筒，纺丝临界电压可有效降低；本发明采用锥形凸起旋转辊筒代替传统针头，解决了针头堵塞的问题，在形成泰勒锥时避免了液滴的大小不一和随机性；辊筒上的锥形凸起规则排列，大小适宜，使纳米纤维膜均匀收集。此外，相比光滑圆形辊筒，可有效降低纺丝临界电压。
The invention discloses a cone-shaped convex roller type electrostatic spinning device, wherein the spinning part includes a liquid storage tank for placing the spinning liquid, two side walls opposite to the liquid storage tank are equipped with transmission shafts, and the liquid storage tank is equipped with There is a roller, the roller is fixed in the liquid storage tank through the transmission shaft, and the transmission shaft is respectively connected with the negative pole of the DC high voltage generator and the roller motor; the roller is provided with a conical protrusion; the collection part includes a collection with horizontal movement function Roller shutter, the collection roller shutter is located directly above the reservoir. The invention also discloses a method for preparing the nanofiber membrane by using the device. Compared with the smooth circular roller, the spinning critical voltage can be effectively reduced; the invention uses a conical convex rotating roller to replace the traditional needle, which solves the problem of needle blockage and avoids the different sizes of droplets when forming Taylor cones And randomness; the conical protrusions on the roller are arranged regularly and the size is appropriate, so that the nanofiber film is collected evenly. In addition, compared with smooth round rollers, the spinning critical voltage can be effectively reduced.
Description
技术领域technical field
本发明属于静电纺丝技术领域，涉及一种锥形凸起辊筒式静电纺丝装置，本发明还涉及利用上述装置制备纳米纤维膜的方法。The invention belongs to the technical field of electrospinning, and relates to a tapered convex roller type electrospinning device, and also relates to a method for preparing a nanofiber film by using the device.
背景技术Background technique
静电纺丝技术是目前生产纳米纤维膜最简单有效的方法，该方法是带电聚合物液滴在电场力、表面张力及重力等力共同作用下被拉伸变形，得到聚合物射流，这些射流经过溶剂挥发固化成纳米纤维，最后聚集在收集装置上形成纤维膜。纳米纤维由于其比表面积、孔隙率等微观结构及性能在某些方面优于普通纤维，因此可广泛应用在复合材料、过滤材料、环保材料、过滤材料、防护材料等领域。Electrospinning technology is currently the simplest and most effective method for producing nanofiber membranes. In this method, charged polymer droplets are stretched and deformed under the combined action of electric field force, surface tension, and gravity to obtain polymer jets. These jets pass through The solvent volatilizes and solidifies into nanofibers, and finally gathers on the collecting device to form a fibrous film. Nanofibers can be widely used in composite materials, filter materials, environmental protection materials, filter materials, protective materials and other fields due to their specific surface area, porosity and other microstructure and properties that are superior to ordinary fibers in some aspects.
传统的单针头静电纺丝装置由于产量低而不能满足产业化需求，所以各国研究人员都在致力于研究规模化制备方法。多针头和无针头纺丝装置是现阶段研究人员普遍研究的方向，大量的发明装置都是围绕着这两种方法展开，虽然都能在一定程度上提高纳米纤维的产量，但是它们依然存在不足。例如，对于多针头静电纺丝装置，各个针头位置固定，可变性差，导致纤维膜聚集形式单一，收集均匀性差，有时还会出现针头堵塞现象，使生产无法进行；对于无针头静电纺丝装置，要通过外部条件来使聚合物溶液形成泰勒椎，控制条件要求高，导致了装置的复杂性，形成的泰勒锥大小不一且有一定的随机性。The traditional single-needle electrospinning device cannot meet the needs of industrialization due to its low output, so researchers from all over the world are working on large-scale preparation methods. Multi-needle and needle-free spinning devices are the general research directions of researchers at this stage. A large number of inventive devices are developed around these two methods. Although they can increase the output of nanofibers to a certain extent, they still have shortcomings. . For example, for a multi-needle electrospinning device, the position of each needle is fixed and the variability is poor, resulting in a single aggregation form of the fiber film, poor collection uniformity, and sometimes needle clogging, which makes production impossible; for a needleless electrospinning device , To make the polymer solution form Taylor cones through external conditions, the control conditions require high requirements, which leads to the complexity of the device, and the formed Taylor cones are of different sizes and have certain randomness.
发明内容Contents of the invention
本发明的目的是提供一种锥形凸起辊筒式静电纺丝装置，解决了现有纳米纤维膜制备中针头堵塞和纤维膜均一性不足的问题。The purpose of the present invention is to provide a cone-shaped convex roller-type electrospinning device, which solves the problems of needle blockage and insufficient uniformity of the fiber membrane in the existing nanofiber membrane preparation.
本发明的另一目的是提供利用上述锥形凸起辊筒式静电纺丝装置制备连续纳米纤维膜的方法。Another object of the present invention is to provide a method for preparing a continuous nanofiber film using the above-mentioned tapered convex roller electrospinning device.
本发明所采用的技术方案是，一种锥形凸起辊筒式静电纺丝装置，包括纺丝部分和收集部分，The technical solution adopted in the present invention is a tapered raised drum type electrospinning device, comprising a spinning part and a collecting part,
纺丝部分包括放置纺丝液的储液槽，储液槽相对的两个侧壁上安装有传动轴，储液槽内设置有辊筒，辊筒通过传动轴固定于储液槽内，传动轴分别与直流高压发生器负极和辊筒电机连接；辊筒上设置有锥形凸起；The spinning part includes a liquid storage tank for placing the spinning liquid. A transmission shaft is installed on the two opposite side walls of the liquid storage tank. A roller is arranged in the liquid storage tank. The roller is fixed in the liquid storage tank through the transmission shaft. The shaft is respectively connected with the negative pole of the DC high voltage generator and the roller motor; the roller is provided with a conical protrusion;
收集部分包括具有水平移动功能的收集卷帘，收集卷帘位于储液槽正上方，收集卷帘接直流高压发生器正极。The collection part includes a collection roller shutter with horizontal movement function, the collection roller shutter is located directly above the liquid storage tank, and the collection roller shutter is connected to the positive pole of the DC high voltage generator.
本发明的特点还在于，The present invention is also characterized in that,
锥形凸起设置有多个，且锥形凸起在辊筒表面均匀排列。There are multiple conical protrusions, and the conical protrusions are evenly arranged on the surface of the roller.
收集卷帘两端分别设置有卷帘辊轴，卷帘辊轴与卷帘电机连接。The two ends of the collecting roller blind are respectively provided with roller blind roller shafts, and the roller blind roller shafts are connected with the roller blind motors.
本发明所采用的另一技术方案是，一种制备连续纳米纤维膜的方法，所采用的锥形凸起辊筒式静电纺丝装置，包括纺丝部分和收集部分，Another technical solution adopted in the present invention is a method for preparing a continuous nanofiber film, the tapered raised roller type electrospinning device used includes a spinning part and a collecting part,
纺丝部分包括放置纺丝液的储液槽，储液槽相对的两个侧壁上安装有传动轴，储液槽内设置有辊筒，辊筒通过传动轴固定于储液槽内，传动轴分别与直流高压发生器负极和辊筒电机连接；辊筒上设置有锥形凸起；The spinning part includes a liquid storage tank for placing the spinning liquid. A transmission shaft is installed on the two opposite side walls of the liquid storage tank. A roller is arranged in the liquid storage tank. The roller is fixed in the liquid storage tank through the transmission shaft. The shaft is respectively connected with the negative pole of the DC high voltage generator and the roller motor; the roller is provided with a conical protrusion;
收集部分包括具有水平移动功能的收集卷帘，收集卷帘位于储液槽正上方，收集卷帘接直流高压发生器正极；The collection part includes a collection roller shutter with horizontal movement function, the collection roller shutter is located directly above the liquid storage tank, and the collection roller shutter is connected to the positive pole of the DC high voltage generator;
锥形凸起设置有多个，且锥形凸起在辊筒表面均匀排列；There are multiple conical protrusions, and the conical protrusions are evenly arranged on the surface of the roller;
具体按以下步骤实施：Specifically follow the steps below:
将纺丝液注入上述装置的储液槽中，在室温和相对湿度35％～60％的环境中，调节正对收集卷帘的锥形凸起的顶端与收集卷帘的垂直距离，开启辊筒电机，通过辊筒旋转使锥形凸起携带纺丝溶液；待辊筒转动稳定后，开启直流高压发生器，调节外加电压和辊筒转速，辊筒表面的锥形凸起与收集卷帘之间形成电场，在电场力作用下每个锥形凸起的顶端产生射流，待液滴和射流稳定后，开启收集部分，使收集卷帘水平移动，纺丝射流沉积在收集卷帘上，即得到均匀的纳米纤维膜。Inject the spinning solution into the liquid storage tank of the above-mentioned device, and adjust the vertical distance between the top of the conical protrusion facing the collection roller shutter and the collection roller shutter in an environment of room temperature and relative humidity of 35% to 60%, and open the roller Drum motor, through the rotation of the drum, the conical protrusions carry the spinning solution; after the drum rotates stably, turn on the DC high voltage generator, adjust the applied voltage and the rotational speed of the drum, the conical protrusions on the drum surface and the collection roller shutter An electric field is formed between them, and under the action of the electric field force, the top of each conical protrusion generates a jet. After the droplets and the jet are stabilized, the collecting part is opened to move the collecting curtain horizontally, and the spinning jet is deposited on the collecting curtain. That is, a uniform nanofibrous film is obtained.
本发明的特点还在于，The present invention is also characterized in that,
收集卷帘两端分别设置有卷帘辊轴，卷帘辊轴与卷帘电机连接。The two ends of the collecting roller blind are respectively provided with roller blind roller shafts, and the roller blind roller shafts are connected with the roller blind motors.
正对收集卷帘的锥形凸起的顶端与收集卷帘的垂直距离为100mm～200mm。The vertical distance between the top of the conical protrusion facing the collection roller blind and the collection roller blind is 100mm-200mm.
辊筒转速200r/min～500r/min。Roller speed 200r/min～500r/min.
收集卷帘的移动速度为6m/min～60m/min。The moving speed of the collecting roller shutter is 6m/min～60m/min.
本发明的有益效果是，The beneficial effect of the present invention is,
1.本发明装置结构简单，操作便利，相比光滑圆形辊筒，纺丝临界电压可有效降低；1. The device of the present invention has simple structure and convenient operation. Compared with smooth circular rollers, the spinning critical voltage can be effectively reduced;
2.本发明采用锥形凸起旋转辊筒作为纺丝装置，代替了传统针头，解决了针头堵塞的问题，在形成泰勒锥时避免了液滴的大小不一和随机性；2. The present invention adopts the conical convex rotating roller as the spinning device, which replaces the traditional needle, solves the problem of needle blockage, and avoids the inconsistency and randomness of the droplet when forming the Taylor cone;
3.本发明中辊筒上的锥形凸起规则排列，大小适宜，使纳米纤维膜均匀收集。3. In the present invention, the tapered protrusions on the roller are regularly arranged and the size is suitable, so that the nanofibrous film can be collected evenly.
附图说明Description of drawings
图1是本发明锥形凸起辊筒式静电纺丝装置的结构示意图；Fig. 1 is the structural representation of tapered raised roller type electrospinning device of the present invention;
图2是本发明锥形凸起辊筒式静电纺丝装置中辊筒的结构示意图。Fig. 2 is a schematic structural view of the roller in the tapered convex roller electrospinning device of the present invention.
图中，1.卷帘辊轴，2.收集卷帘，3.直流高压发生器，4.卷帘电机，5.传动轴，6.接地线，7.辊筒，8.辊筒电机，9.储液槽，10.锥形凸起。In the figure, 1. Roller roller shaft, 2. Collection roller shutter, 3. DC high voltage generator, 4. Roller shutter motor, 5. Transmission shaft, 6. Grounding wire, 7. Roller, 8. Roller motor, 9. Liquid storage tank, 10. Tapered protrusion.
具体实施方式detailed description
下面结合附图和具体实施方式对本发明进行详细说明。The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
本发明锥形凸起辊筒式静电纺丝装置其结构如图1所示，包括纺丝部分和收集部分，The structure of the tapered convex roller type electrospinning device of the present invention is as shown in Figure 1, including a spinning part and a collecting part,
纺丝部分包括放置纺丝液的储液槽9，储液槽9相对的两个侧壁上安装有传动轴5，储液槽9内设置有辊筒7，辊筒7通过传动轴5固定于储液槽9内，传动轴5分别与直流高压发生器3负极和辊筒电机8连接；辊筒7上设置有锥形凸起10；The spinning part includes a liquid storage tank 9 for placing the spinning liquid, and a transmission shaft 5 is installed on the two opposite side walls of the liquid storage tank 9, and a roller 7 is arranged in the liquid storage tank 9, and the roller 7 is fixed by the transmission shaft 5 In the liquid storage tank 9, the transmission shaft 5 is respectively connected with the negative pole of the DC high voltage generator 3 and the roller motor 8; the roller 7 is provided with a conical protrusion 10;
收集部分包括具有水平移动功能的收集卷帘2，收集卷帘2位于储液槽9正上方，收集卷帘2接直流高压发生器3正极。The collection part includes a collection roller shutter 2 with a horizontal movement function, the collection roller shutter 2 is located directly above the liquid storage tank 9, and the collection roller shutter 2 is connected to the positive pole of the DC high voltage generator 3.
如图2所示，锥形凸起10设置有多个，且锥形凸起10在辊筒7表面均匀排列。As shown in FIG. 2 , there are multiple conical protrusions 10 , and the conical protrusions 10 are uniformly arranged on the surface of the roller 7 .
收集卷帘2两端分别设置有卷帘辊轴1，卷帘辊轴1与卷帘电机4连接。The two ends of the collecting roller blind 2 are respectively provided with a roller blind roller shaft 1 , and the roller blind roller shaft 1 is connected with a roller blind motor 4 .
利用上述锥形凸起辊筒式静电纺丝装置制备纳米纤维膜的方法，具体按以下步骤实施：The method for preparing a nanofiber film by using the above-mentioned tapered raised roller electrospinning device is specifically implemented according to the following steps:
将纺丝液注入上述装置的储液槽9中，在室温和相对湿度35％～60％的环境中，调节正对收集卷帘2的锥形凸起10的顶端与收集卷帘2的垂直距离为100mm～200mm，开启辊筒电机8，通过传动轴5带动辊筒7旋转，使锥形凸起10携带纺丝溶液；待辊筒7转动稳定后，开启直流高压发生器3，调节外加电压，并调节辊筒转速为200r/min～500r/min，辊筒7表面的锥形凸起10与收集卷帘2之间形成电场，在电场力作用下每个锥形凸起10的顶端产生射流；待液滴和射流稳定后，开启卷帘电机4，卷帘电机4驱动卷帘辊轴1使收集卷帘2以6m/min～60m/min的速度水平移动，纺丝射流沉积在收集卷帘2上，即得到均匀的纳米纤维膜。Spinning solution is injected in the liquid storage tank 9 of above-mentioned device, in the environment of room temperature and relative humidity 35%～60%, adjust the perpendicularity of the top of the conical protrusion 10 facing collection roll screen 2 and collection roll screen 2 The distance is 100mm～200mm, turn on the roller motor 8, and drive the roller 7 to rotate through the transmission shaft 5, so that the conical protrusion 10 carries the spinning solution; after the roller 7 rotates stably, turn on the DC high voltage generator 3, adjust the external voltage, and adjust the roller speed to 200r/min～500r/min, an electric field is formed between the conical protrusions 10 on the surface of the roller 7 and the collection roller curtain 2, and the top of each conical protrusion 10 is formed under the action of the electric field force Generate jet flow; after the liquid droplets and jet flow are stable, turn on the roller shutter motor 4, and the roller shutter motor 4 drives the roller shutter roller 1 to make the collection roller shutter 2 move horizontally at a speed of 6m/min～60m/min, and the spinning jet is deposited on the Collect on the roller screen 2 to obtain a uniform nanofibrous film.
实施例1Example 1
将聚丙烯腈(PAN)溶解在溶剂N,N-二甲基甲酰胺(DMF)中，配置成浓度为16wt％的纺丝液。在室温和相对湿度为35％的环境下，将纺丝液注入到储液槽9中，辊筒7表面正对收集卷帘2的锥形凸起10的顶端与收集卷帘2的垂直距离为100mm，开启辊筒电机8，设置辊筒转速200r/min，开启直流高压发生器3，逐渐增加电压，直到静电纺射流刚好形成，此时电压为4kV，射流固化成纳米纤维后沉积在收集卷帘2上，开启收集卷帘电机4驱动收集卷帘2以6m/min的速度水平运动，纺丝时间为1小时，得到了厚度均匀的纳米纤维膜。实验结果表明，相比光滑圆形辊筒，保证其它条件相同的情况下，利用此设备纺丝，纤维的直径均匀度提高了70％，纺丝临界电压降低了90％。Polyacrylonitrile (PAN) was dissolved in a solvent N,N-dimethylformamide (DMF) to prepare a spinning solution with a concentration of 16 wt%. Under the environment of room temperature and relative humidity of 35%, the spinning solution is injected into the liquid storage tank 9, and the surface of the roller 7 faces the vertical distance between the top of the conical protrusion 10 of the collection roller curtain 2 and the collection roller curtain 2 Turn on the roller motor 8, set the roller speed to 200r/min, turn on the DC high-voltage generator 3, and gradually increase the voltage until the electrospinning jet is just formed. At this time, the voltage is 4kV, and the jet is solidified into nanofibers and deposited on the collector On the roller shutter 2, the motor 4 of the collection roller shutter was turned on to drive the collection roller shutter 2 to move horizontally at a speed of 6 m/min. The spinning time was 1 hour, and a nanofiber film with uniform thickness was obtained. The experimental results show that, compared with the smooth circular roller, under the same other conditions, the fiber diameter uniformity is increased by 70% and the spinning critical voltage is reduced by 90% by using this equipment for spinning.
实施例2Example 2
将聚乙烯醇(PVA)1788型粉末溶解于70℃蒸馏水中，配成浓度为18wt％的纺丝液。在室温和相对湿度为60％的环境下，将纺丝液注入到储液槽9中，辊筒7表面正对收集卷帘2的锥形凸起10的顶端与收集卷帘2的垂直距离为300mm，开启辊筒电机8，设置辊筒转速500r/min，开启直流高压发生器3，逐渐增加电压，直到静电纺射流刚好形成，此时电压为6kV，射流固化后沉积在收集卷帘2上，开启收集卷帘电机4驱动收集卷帘2以60m/min的速度水平运动，纺丝时间为1小时，得到了厚度均匀的纳米纤维膜。实验结果表明，相比光滑圆形辊筒，保证其它条件相同的情况下，利用此设备纺丝，纤维的直径均匀度提高了60％，纺丝临界电压降低80％。Dissolve polyvinyl alcohol (PVA) 1788 powder in distilled water at 70° C. to prepare a spinning solution with a concentration of 18 wt%. Under the environment of room temperature and relative humidity being 60%, the spinning dope is injected into the liquid storage tank 9, the vertical distance between the top of the conical projection 10 facing the collection roller curtain 2 and the collection roller curtain 2 on the surface of the roller 7 Turn on the roller motor 8, set the roller speed to 500r/min, turn on the DC high-voltage generator 3, and gradually increase the voltage until the electrospinning jet is just formed. At this time, the voltage is 6kV. After the jet solidifies, it is deposited on the collection roller shutter 2 Above, turn on the collection roller shutter motor 4 to drive the collection roller shutter 2 to move horizontally at a speed of 60 m/min, and the spinning time is 1 hour, and a nanofiber film with uniform thickness is obtained. The experimental results show that, compared with the smooth circular roller, under the same other conditions, the fiber diameter uniformity is increased by 60% and the spinning critical voltage is reduced by 80% by using this equipment for spinning.
实施例3Example 3
将聚氧化乙烯(PEO)溶解在60℃蒸馏水中，配置成浓度为14wt％的纺丝液。在室温和相对湿度为50％的环境下，将纺丝液注入到储液槽9中，辊筒7表面正对收集卷帘2的锥形凸起10的顶端与收集卷帘2的垂直距离为200mm，开启辊筒电机8，设置辊筒转速350r/min，开启直流高压发生器3，逐渐增加电压，直到静电纺射流刚好形成，此时电压为5kV，静电纺射流固化后沉积在收集卷帘2上，开启收集卷帘电机4驱动收集卷帘2以30m/min的速度水平运动，纺丝时间为1小时，得到了厚度均匀的纳米纤维膜。实验结果表明，相比光滑圆形辊筒，保证其它条件相同的情况下，利用此设备纺丝，纤维的直径均匀度提高了75％，纺丝临界电压降低85％。Polyethylene oxide (PEO) was dissolved in 60° C. distilled water to prepare a spinning solution with a concentration of 14 wt%. Under the environment of room temperature and relative humidity being 50%, the spinning dope is injected into the liquid storage tank 9, the vertical distance between the top of the conical protrusion 10 facing the collection roller curtain 2 and the collection roller curtain 2 on the surface of the roller 7 Turn on the roller motor 8, set the roller speed to 350r/min, turn on the DC high-voltage generator 3, and gradually increase the voltage until the electrospinning jet is just formed. At this time, the voltage is 5kV, and the electrospinning jet is solidified and deposited on the collection roll. On the curtain 2, open the collection roller shutter motor 4 to drive the collection roller shutter 2 to move horizontally at a speed of 30 m/min. The spinning time is 1 hour, and a nanofiber film with uniform thickness is obtained. The experimental results show that, compared with the smooth circular roller, under the same other conditions, the fiber diameter uniformity is increased by 75% and the spinning critical voltage is reduced by 85% by using this equipment for spinning.
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| CN108085754A (en) * | 2018-01-18 | 2018-05-29 | 上海工程技术大学 | A kind of magnanimity prepares the electrostatic spinning apparatus and method of nanofiber |
| CN108166080A (en) * | 2018-03-22 | 2018-06-15 | 北京化工大学 | A kind of dipping liquid formula electrostatic spinning apparatus |
| CN109023560A (en) * | 2018-10-23 | 2018-12-18 | 西北工业大学 | The device and method of hollow nanometer yarn is directly prepared based on electrostatic spinning technique one-step method |
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