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Electrospinning machine with special textured electrodes and method of application thereof

An electrospinning machine and reticulate technology are applied in the field of high-efficiency electrospinning film-making devices, which can solve problems such as difficulty in preparing high-strength nanofiber films, and achieve the effect of solving low mechanical strength.

Inactive Publication Date: 2012-02-01
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the purposes of the present invention is to provide an electrospinning machine with special mesh electrodes in order to overcome the disadvantage that the above-mentioned common electrospinning equipment is not easy to prepare high-strength nanofiber membranes, and the electrospinning machine is controlled by the special mesh arrangement of the electrodes. The direction in which the nanofibers are ejected during the spinning process makes the fiber strands fully intersect, thereby "weaving" a high-strength nanofiber film

Method used

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  • Electrospinning machine with special textured electrodes and method of application thereof
  • Electrospinning machine with special textured electrodes and method of application thereof
  • Electrospinning machine with special textured electrodes and method of application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] See Figure 1~3 . An electrospinning machine with temperature control device 12 and mechanical control device 11 (such as figure 1 shown), the multi-needle nozzle 2 of the electrospinning machine (such as figure 2 As shown) is connected to the high-voltage output of one end of the high-voltage DC power supply 1 through a high-voltage wire, and the feed hole of the multi-needle spinneret is connected with the metering infusion pump 6 through a pipeline; The engineering plastic receiving roller 7 on the top, the engineering plastic receiving roller 7 has a motor 5, and the surface of the receiving roller is embedded with a special textured copper electrode 8 (such as image 3 shown); the multi-needle nozzle is at the same height as the horizontal axis of rotation of the receiving roller; the extended copper wire 9 of the anilox copper electrode on the surface of the receiving roller is connected to the special ground wire through the wire and is effectively grounded. ...

Embodiment 2

[0043] Preparation weight concentration is the polyvinylpyrrolidone (PVP) ethanol solution of 11%, the viscosity of solution is between 300~400mPa S, stirs 3 days at 25 ℃, adopts the electrospinning machine of embodiment 1, single row of multi-needle nozzles Horizontal reciprocating scanning spraying. Set the rotational speed of the receiving roll to be 30cm / min, the distance between the spinneret and the receiving roll to be 8-10cm, the applied electric field strength to be 1-1.2kV / cm (voltage 8-12kV), and the moving speed of the spinneret to be 40-45cm / min, the solution delivery speed is 8mL / h per needle. Turn on the high-voltage power supply, the drive motor of the receiving roller, the metering infusion pump and the drive motor of the multi-needle nozzle, the operating environment temperature is 30°C, the spraying time is 30 minutes, and the spraying volume is controlled to 36m 2 / h. Obtain uniform polyvinylpyrrolidone nanofiber film on the receiving roll surface, its su...

Embodiment 3

[0045] The structure of the electrospinning machine with special mesh electrodes is the same as that in Example 1.

[0046] Prepare a polyvinyl alcohol ethanol solution with a weight concentration of 8.2%, the solution viscosity is between 600-700mPa·S, stir at 25°C for 3 days, and use a single row of multi-needle nozzles for horizontal reciprocating scanning and spraying. Set the rotational speed of the receiving roller to 60cm / min, the distance between the nozzle and the receiving roller to be 8-10cm, the applied electric field strength to be 1.2-1.5kV / cm (voltage 10-15kV), and the moving speed of the spinneret to be 40-45cm / min, the solution delivery rate is 15mL / h per needle. Turn on the high-voltage power supply, the drive motor of the receiving roller, the metering infusion pump and the driving motor of the multi-needle nozzle, the operating environment temperature is 40°C, the spraying volume is set to 48mL / h, and the spraying time is 15 minutes, and a uniform white po...

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Abstract

The invention relates to a high-efficiency electrospinning film-making device capable of controlling the orientation of nanofibers, in particular to an electrospinning machine with special mesh electrodes and a method for preparing high-strength nanofiber films using the electrospinning machine. The present invention changes the common metal plate or metal drum electrode design concept in ordinary electrospinning devices, and designs a small electrospinning machine with special mesh copper electrodes and high-efficiency multi-needle nozzles, and prepares nanofibers that can control the orientation of nanofibers. High-strength nanofiber film.

Description

technical field [0001] The invention relates to a high-efficiency electrospinning film-making device capable of controlling the orientation of nanofibers, in particular to an electrospinning machine with special mesh electrodes and a method for preparing high-strength nanofiber films using the electrospinning machine. technical background [0002] Electrospinning is an important method for preparing nanofibers and functional nanofiber films. At present, the research of electrospinning mainly focuses on basic research, and the simple device of single-needle nozzle and metal plate (or roller) receiving electrode is used to prepare various nanowires and nanocomposites. [0003] The strength of nanofibers is usually high, but the strength of nanofiber membranes prepared by electrospinning is generally relatively low. The reason is that the nanofibrous membrane is formed by stacking layers of nanofibers, there is no fusion between layers, and there is not enough interpenetration...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18D01D5/00
Inventor 吴大勇王海燕
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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