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Apparatus for preparing macromolecule nano-fibre and spinning method thereof

A nanofiber and polymer technology, applied in fiber processing, temperature control, filament/thread forming, etc., can solve the problem that the local temperature adjustment of the spinneret and nozzle is not fine enough, the heating device cannot be fully utilized, and the temperature regulation is slow and other problems, to achieve the effect of simple and practical operation steps, simple and practical device, and fine adjustment

Active Publication Date: 2008-12-03
重庆龙翼生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the device of this method is too complicated to make full use of the energy consumed by the heating device; at the same time, since the entire space needs to be heated by the temperature control device, the temperature regulation is relatively slow, and the local temperature regulation of the spinneret and nozzle is not fine enough.

Method used

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  • Apparatus for preparing macromolecule nano-fibre and spinning method thereof
  • Apparatus for preparing macromolecule nano-fibre and spinning method thereof
  • Apparatus for preparing macromolecule nano-fibre and spinning method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] refer to figure 2 , making the local heating and temperature detection part 3 in the device for preparing polymer nanofibers of the present invention, the local heating and temperature detection part 3 has a spinneret 9 for containing the polymer solution 8, the spinneret 9 is made of glass tube, at the end of the spinneret 9, a conductive metal needle with a ground needle is installed as the nozzle 6, such as a stainless steel injection needle; 9, and close to the outer wall of the spinneret 9, a standard thermocouple temperature sensor 4 purchased on the market with a temperature control error of ±1°C is placed between the spinneret 9 and the heating coil 7 to detect the temperature , the temperature control range of the temperature sensor 4 is 30-300°C.

Embodiment 2

[0036] refer to figure 1 with figure 2 , use the local heating and temperature detection part 3 made in Example 1 to make a set of finely adjustable local temperature electrospinning device of the present invention.

[0037] Take an adjustment bracket with a test tube clamp, install a condensation tube 5 in the test tube clamp, set the local heating and temperature detection part 3 under the test tube clamp, and seal the lower opening of the condensation tube 5 to the spinneret The pipe 9 is connected to the mouth and condensed water is passed into it. The spinneret 9 is connected to the positive pole of the high voltage generator 4 as an anode. A piece of aluminum foil is used as a conductive receiving plate 1, and the conductive receiving plate 1 is electrically connected to the negative pole of the high voltage generator 2 as a cathode, and the cathode is grounded at the same time; the nozzle 6 is arranged directly above the conductive receiving plate 1, and the distanc...

Embodiment 3

[0040] In this embodiment, the device of Example 2 is used to prepare polyvinylidene fluoride (PVDF) electrospinning by the local fine temperature control method of the present invention, and the specific steps are as follows:

[0041] 1). Dissolve 2g of polyvinylidene fluoride (average molecular weight 270,000) in 8g of a mixed solvent of acetone and dimethylformamide (DMF), heat to 70 degrees Celsius, and magnetically stir for 4 hours to obtain the concentration at 70 degrees Celsius. 20wt% transparent PVDF polymer solution 8;

[0042] 2). Start the local heating and temperature detection part 3 in the device, and heat the temperature of this part to the temperature required for the preset PVDF polymer solution spinning, that is, the local heating and temperature detection in Example 1 Part 3 preset temperature is set to 70 degrees Celsius;

[0043] 3). When the electrospinning is prepared by local fine temperature control, when the actual temperature of the local heating a...

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Abstract

The invention relates to a device for preparing macromolecule nano-fibre, and a spinning method. The device comprises: a nozzle which is connected with a fibre spraying tube and is electrically connected with the anode or the cathode of a high-voltage generator, wherein, a conductive receiving board is electrically connected with the cathode or the anode of the high-voltage generator; a drain sleeve, the lower port of which is sealed together with the upper port of the fibre spraying tube; and a heating coil which is arranged outside the fibre spraying tube and enwraps the fibre spraying tube tightly, wherein, a temperature transmitter is positioned between the heating coil and the fibre spraying tube and is attached to the fibre spraying tube, and a temperature feedback controller is electrically connected with the temperature transmitter and the heating coil respectively. A signal which is measured by the temperature transmitter is received and the working of the heating coil is regulated and controlled, to lead the contained macromolecular solution to reach the preset temperature. In the spinning method, the macromolecular solution which is prepared by polymer material is contained in the fibre spraying tube, and is heated until the temperature reaches the preset temperature through the temperature feedback controller; pressure is loaded, the macromolecule nano-fibre flows out from the nozzle under the action of the electric field force and is collected on the receiving board.

Description

technical field [0001] The invention relates to a device and method for preparing polymer nanofibers, in particular to a method for adjusting the polymer solution in the electrospinning process by adding a heating device and a temperature feedback system locally to the electrospinning spinneret and nozzle Temperature, so as to achieve fine adjustment of the preparation device and method of polymer nanofibers. Background technique [0002] One-dimensional nanomaterials have gradually attracted people's attention in the last decade because of their unique physical and chemical properties. Among the branches of many one-dimensional nanomaterials, polymer nanofibers have attracted great attention because of their wide range of applications and simple preparation methods. Among various methods for preparing polymer nanofibers, electrospinning has gradually become a routine method in recent years because of its simple requirements, various materials that can be prepared, simple p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00D01D13/02G05D23/22
CPCD01D5/0069D01D1/09
Inventor 蒋兴宇仰大勇张东舟蒋君乐
Owner 重庆龙翼生物科技有限公司
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