Circulating spinning device and application thereof in preparation of uniform nanofiber diaphragm

A technology of spinning device and driving device, which is applied in the field of circulating spinning device and its application in the preparation of uniform nanofiber diaphragm, which can solve the problems of large surface density and thickness deviation, inability to fully utilize the nanofiber diaphragm, and inability to move And other issues

Active Publication Date: 2020-10-23
JIANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The needles (nozzles) of the various nanofiber preparation systems reported so far are reciprocating horizontally or even unable to move, which fundamentally determines that the prepared nanofiber membrane cannot have uniform surface density and thickness, or surface density and thickness. large deviation
In order to achieve the effect of use, the thickness of the diaphragm has to be increased, which greatly reduces the utilization rate of the nanofiber diaphragm, and even cannot fully utilize the characteristics of the nanofiber diaphragm

Method used

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  • Circulating spinning device and application thereof in preparation of uniform nanofiber diaphragm

Examples

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preparation example Construction

[0027] In the method for preparing a nanofiber membrane with a uniform thickness in the present invention, a plurality of circulating spinning devices can be used for simultaneous spinning to prepare a fiber membrane, and the spinning needle points (nozzles) on each circulating spinning device can be at the same starting position , and can also be staggered at a certain distance to achieve better results.

[0028] In the present invention, the plurality of spray heads are fixedly installed on the transmission belt in an equidistant manner. In the present invention, the driving wheel is connected with a motor, and through the motor, the driving wheel, the driven wheel and the conveyor belt, the spray head mounted on the conveyor belt is driven to realize circular operation. Since the distance between each nozzle is the same, the nanofibers extruded by the nozzle evenly fall on the receiving device during the circular movement of the nozzle driven by the conveyor belt, which hel...

Embodiment 1

[0041] see figure 1 , this embodiment provides a method for preparing a nanofiber membrane of uniform thickness through a circulating spinning device, using several circulating spinning devices to prepare the nanofibers by electrospinning; the circulating spinning device includes a driving device, Liquid supply device, power supply device and spinning device; Described driving device comprises driving wheel 2, driven wheel 7 and conveyer belt 5, and described conveyer belt 5 is connected with it through described driving wheel 2 and driven wheel 7; Said liquid supply The device comprises a solution storage tank 9, a metering pump 10, a solution delivery pipeline 11 and a liquid separator 15, the solution storage tank 9 is connected with the liquid distributor 15 through the solution delivery pipeline 11, and the solution delivery pipeline 11 is The metering pump 10 is provided; the power supply device includes a high-voltage power supply 8, a high-voltage power supply line 12 ...

Embodiment 2

[0043] A method for preparing a nanofiber diaphragm of uniform thickness is provided, wherein 5 circulating spinning devices as shown in Example 1 are used to jointly prepare a nylon (PA) nanofiber diaphragm, and its specific method includes the following steps:

[0044] 1. Add the PA solution into the solution tank, turn on the gear pump, and the flow rate of the gear pump is 5ml / min. After the PA solution fills the dispenser, turn on the high voltage power supply and set the voltage to +70±5KV.

[0045] 2. Turn on the driving system of the driving and passive wheels, and set the line speed to 1m / min.

[0046] 3. After all the solution is electrospun from the nozzle, turn on the receiving device and set the linear speed of the receiving device to 5m / min.

[0047] 4. After the system is stable, take out the PA nanofiber membrane. The average surface density of the PA nanofiber membrane is 3.2g / cm2, the average thickness is 8μm, the average deviation of the surface density is ...

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Abstract

The invention relates to the technical field of electrostatic spinning, in particular to a circulating spinning device and application thereof in preparation of a uniform nanofiber diaphragm. The circulating spinning device comprises a driving device, a liquid supply device, a power supply device and a wire spraying device, wherein the driving device comprises a driving wheel, a driven wheel and aconveying belt, the conveying belt penetrates through the driving wheel and the driven wheel and is connected with the driving wheel and the driven wheel, the liquid supply device comprises a solution storage tank, a metering pump, a solution conveying pipeline and a liquid separator, the solution storage tank is connected with the liquid separator through the solution conveying pipeline, the metering pump is arranged on the solution conveying pipeline, the power supply device comprises a high-voltage power supply, a high-voltage power line and a high-voltage slip ring, the high-voltage slipring is arranged on the liquid separator and is connected with the high-voltage power supply through a high-voltage power line, and the wire spraying device comprises a plurality of spray heads mounted on a driving belt. Through the device, the transverse surface density and the thickness uniformity of the nanofiber diaphragm are effectively improved.

Description

technical field [0001] The invention relates to the technical field of electrospinning, in particular to a circulating spinning device and its application in the preparation of uniform nanofiber diaphragms. Background technique [0002] Due to the characteristics of small diameter and large specific surface area of ​​nanofibers, nanofibers and their fiber products are widely used in air filtration, liquid filtration, energy / battery separators, biomedicine, drug sustained release, personal protection, environmental protection, and sound-absorbing materials and other fields. As the main fiber product of nanofibers, nanofiber separator plays a very important role in the above fields. The areal density and thickness uniformity of the separator are important indicators that the separator can play its role. Because the needle-spun (nozzle type) nanofiber manufacturing system must move the needle (nozzle) in order to obtain a relatively uniform surface density and thickness of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00
CPCD01D5/0061D01D5/0069D01D5/0092
Inventor 侯豪情程楚云王科遇袁梦杰
Owner JIANGXI NORMAL UNIV
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