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A device and method for preparing ultra-large area suspended nanofiber webs

A nanofiber mesh and super-large area technology, which is applied in the field of devices for preparing super-large-area suspended nanofiber meshes, can solve the problems of irregular deposition of fibers, clogging of injection ports, etc., and achieve the effects of weakening electric field strength, weakening influence, and simple structure.

Active Publication Date: 2020-11-03
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the beginning of the injection process, it is a short thick line, which may block the injection port. As the lower end is elongated by the force of the electric field, the whole process becomes stable. This process can obtain thinner nanofibers, but it will make Irregular deposition of fibers, with the increasing application of nanofibers, the demand for large-area flexible devices is also increasing

Method used

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  • A device and method for preparing ultra-large area suspended nanofiber webs
  • A device and method for preparing ultra-large area suspended nanofiber webs
  • A device and method for preparing ultra-large area suspended nanofiber webs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Selection of electrospinning materials

[0035] The 200,000-grade PVA polyvinyl alcohol 1788 material used in this embodiment can also be selected from PVP polyvinylpyrrolidone and PAN polyacrylonitrile. This type of material has good resilience and curling properties, and excellent film-forming properties. The preferred PVA polyvinyl alcohol 1788 in the experiment of the present invention is because of its good solubility, it can be dissolved in the aqueous solution by heating at 65-75°C, and it is not easy to produce gel during spinning to block the spinning nozzle.

[0036] (2) Electrospinning fiber preparation

[0037] Weighed 6 g of PVA polyvinyl alcohol 1788 with a molecular weight of 200,000 grade and added it to 40 ml of deionized water to prepare a solution with a mass ratio of 15%. Stir in a water bath at 70°C until it is completely dissolved and prepare the spinning solution; add the completely dissolved PVA1788 solution to the needle-type spinning nozzl...

Embodiment 2

[0043] The experimental procedure is the same as in Example 1, and the specific parameters are as follows:

[0044] The spinning solution is a PVP polyvinylpyrrolidone solution with a concentration of 12% mass ratio; the voltage is 10KV; the distance between the needle tube type spinning nozzle 2 and the metal ring 9 is 20cm, the spinning speed is 1.2ml / h, and the air humidity is kept at 39% or less. It is also possible to obtain a super-large-area suspended nanofiber web.

Embodiment 3

[0046] The experimental procedure is the same as in Example 1, and the specific parameters are as follows:

[0047] The spinning solution is a PAN polyacrylonitrile solution with a concentration of 18% by mass; the voltage is 20KV; the distance between the needle tube type spinning nozzle 2 and the metal ring 9 is 30cm, the spinning speed is 2.5ml / h, and the air humidity is maintained at 39% or less. It is also possible to obtain a super-large-area suspended nanofiber web.

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Abstract

The invention belongs to the technical field of electrostatic spinning, and relates to a device and a method for preparing an ultra-large area suspended nanofiber web. The device mainly consists of ahigh-pressure generating device, a liquid supply device and a spinning collecting mechanism. According to the device, the strength of the electric field can be changed by controlling a jet head to move freely in a plane; when the jet head is positioned directly above the suspension of an outer ring of a metal ring, the electric field strength is maximum at this time, and multiple jets can be sprayed under the action of a high-voltage electrostatic field; and when the jet head is positioned directly above the center of the circle, the electric field strength is weakened, which is beneficial tospinning in the center of the suspended nano web. The structure is simple, and the influence of the external electric field on the spinning process is further weakened as much as possible, so that thespinning process is uniformly distributed under the action of the whole electric field, and large-area spinning can be realized and controlled.

Description

technical field [0001] The invention belongs to the technical field of electrospinning, and relates to a device and a method for preparing a super large-area suspended nanofiber net. Background technique [0002] The electrospinning method has simple equipment, controllable process, and continuous production. It is currently the most convenient and effective method for directly preparing nanofibers. Judging from the law of industrial technology development, application and market development, this technology has entered the early stage of industrial application. Once a breakthrough is achieved, the market scale will quickly form and grow rapidly. [0003] In traditional electrospinning, the prepared polymer is sprayed out through the nozzle, and a high-voltage electric field is applied to the exit of the nozzle and the collecting spinning outlet to form a cone, that is, a Taylor cone. When the applied high voltage exceeds a certain threshold, the polymer moves along the dir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/00D04H3/02D04H3/007
CPCD01D5/003D01D5/0069D01D5/0076D01D5/0092D04H3/007D04H3/02D10B2321/06D10B2321/10
Inventor 江诚鸣张旭文卜镜元曹泽孙楠谭东宸宋金会
Owner DALIAN UNIV OF TECH
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