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Electrospinning device for preparing nano fabrics massively

An electrospinning and nanofiber technology, which is applied in fiber processing, nonwovens, textiles and papermaking, etc., can solve the problems of affecting the strength of fabrics, insufficient improvement, uneven fiber filaments, etc., to increase spinning efficiency, spinning Improved wire efficiency and uniform thickness structure

Inactive Publication Date: 2010-04-07
BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(3) Another problem with this device is that the surface of the drum body is a smooth material or an annular or oblique boss. During the rotation, the spinning solution is brought to the collection device under the action of an electric field. However, because the surface of the drum is smooth, the spinning solution brought up is uneven, resulting in uneven fiber filaments collected by the collecting device, and cannot completely form a uniform to dense fiber fabric.
This equipment has further processed the surface of the generating device, and set various protrusions, such as ring-shaped or transverse protrusions and evenly distributed small protrusions, but this improvement can only achieve an increase in the amount of spinning solution injection, It cannot fundamentally improve the uniformity of the fiber fabric. The unevenness of the fiber fabric will directly affect the strength and other properties of the fabric, and seriously affect its application quality.
(4) Although this device can increase the amount of spinning, compared with the original technology, the efficiency has been improved, but the degree of improvement is not enough, and it still cannot meet the needs of the existing market for textiles
(5) This device can only weave a single type of nanofiber fabric, which cannot be realized for the weaving of blended or interlayer fabrics that are currently popular in the market.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Electrospinning device for preparing nano fabrics massively
  • Electrospinning device for preparing nano fabrics massively
  • Electrospinning device for preparing nano fabrics massively

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 Shown, a kind of electrospinning device of preparing nanofiber fabric in a large amount, this device comprises frame, collecting device 1 and at least one group of jet generation device, said group of jet generation device is made up of two spinneret devices 2, The spinneret 2 is a rotatable cylinder 21, which is soaked in the trough 4 filled with the spinning solution 3; the two spinnerets 21 have opposite charges and are arranged oppositely. It is made of insulating material and located in the electric field formed between two spinning devices 21; the collecting device 1 is a structure of a winding drum 11.

[0032] The spinning device 21 is a rotatable drum 211 with a spiral convex structure on the surface. Such as Figure 4 As shown, the vertical height of the helicoid of the helical convex structure from the surface of the cylinder is 1 mm. The distance between the two spinnerets and the receiving surface of the collector is 15 cm respectively. ...

Embodiment 2

[0038] The collecting device is a drum device; the spinning device 21 is a rotatable drum 211, the surface of which is an annular raised structure, such as Figure 5 Shown, other structures are with embodiment 1. The distance between the two spinning devices and the receiving surface of the collecting device is 5 cm respectively. The voltage ranges of the two spinning devices are ±50kV respectively. Each spinneret rotates at a speed of 6 r / min.

[0039] The appropriate amount of average molecular weight of 2.5 × 10 4 The polyethylene terephthalate (PET) is heated to about 240°C, stirred evenly, the spinning device is immersed in the melt, and spinning is started to obtain a wide-width nanofiber non-woven fabric. The throughput is more than 3.5 g / min, and the fiber diameter is 100-1000nm.

Embodiment 3

[0041] The collection device is a conveyor belt device; the spinneret 21 is a rotatable drum 211 with a perforated surface and a hole diameter of 1mm; the distance between the two spinnerets and the receiving surface of the collector is 25cm. The voltage ranges of the two spinning devices are ±5kV respectively. Each spinneret rotates at a speed of 10 r / min.

[0042] Other structures are with embodiment 1.

[0043] Dissolve polylactic acid (PLA) with a mass fraction of 7% in a mixed solvent of dichloromethane and N,N-dimethylformamide, the volume ratio of which is 4:1, and after stirring for 5 hours with a magnetic stirrer, respectively Add an appropriate amount into the two troughs and start spinning to obtain a wide-width nanofiber non-woven fabric. The throughput is more than 3.5 g / min, and the fiber diameter is 100-1000nm.

[0044] Figure 8 Digital photograph of the nanoscale fiber nonwoven fabric prepared for this example. It can be seen that the fiber nonwoven fabri...

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Abstract

The invention discloses an electrospinning device for preparing nano fabrics massively, which comprises a frame, a collection device and at least one group of eject generating device; one group of eject generating device consists of two fiber spraying devices; each fiber spraying device is a rotatable roller which is soaked in a material tank containing spinning solution; the two fiber spraying devices have opposite electric charge and are arranged oppositely; the collection device is made of an insulating material, and is positioned in an electric field formed between the two fiber spraying devices; and the collection device is a fiber roller, a conveyor belt device or a conveyor belt dragging device. The efficiency of producing nano non-woven fabrics by the device is improved manyfold, and unique nano fabrics can be manufactured. The nano fabrics formed have good performance such as flexibility and the like; and the preparation method is simpler than the prior art, so the cost is greatly reduced. Therefore, the electrospinning device has good market prospect.

Description

technical field [0001] The invention relates to an electrostatic spinning device for preparing nanofiber fabrics, in particular to an electrostatic spinning device for preparing nanofiber fabrics in large quantities. Background technique [0002] An electrospinning device generally includes a high-voltage power supply, a liquid supply device, a spray device, and a collection device. The high-voltage power supply provides hundreds to tens of thousands of volts of direct current to the injection device. Under the action of the electric field force, the liquid in the injection device is pulled out and split to form very thin jets that "fly" to the collection device. The jets are solidified and refined during the injection process, and finally become nano or micron-scale fibers. The collection device is generally a metal plate or roller that is grounded or connected to a negative voltage. [0003] At this stage, in order to produce nanofibers on a large scale, those skilled in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H3/16D01D5/00D01D13/02
Inventor 李从举
Owner BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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