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Electro spinning method for preparing orientation arranged polymer spiral nano-fibre and equipment thereof

A technology of directional arrangement and polymer, which is applied in fiber processing, textile and paper making, filament/thread forming, etc., can solve the problems of inability to effectively control helical fibers and difficult to control the directional arrangement of helical fibers, and the method is simple and easy to implement, low cost effect

Inactive Publication Date: 2008-09-03
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem: The present invention aims at the problems existing in the process of producing polymer nano-helical fibers by electrospinning, and establishes a simple method for producing polymer helical fibers that is not dependent on material properties and is generally applicable to various spinnable materials. Difficult to control the alignment, meet the needs of aligned polymer helical nanofibers in various related fields, and establish a key technology suitable for large-scale electrospinning production of oriented helical nanofibers
At present, the formation of helical fibers cannot be effectively controlled in the world. Some existing reports require the selection of special materials, and some only obtain helical fibers by accident. The present invention effectively solves the problem of controlling the helical structure, not only can control the formation of the helical structure, The size and morphology of the helical structure can also be controlled

Method used

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  • Electro spinning method for preparing orientation arranged polymer spiral nano-fibre and equipment thereof
  • Electro spinning method for preparing orientation arranged polymer spiral nano-fibre and equipment thereof
  • Electro spinning method for preparing orientation arranged polymer spiral nano-fibre and equipment thereof

Examples

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Embodiment 1

[0016] Preparation of aligned PCL nanohelical fibers. Dissolve PCL in a 1: 1 mixed solvent of tetrahydrofuran (THF) and DMF (dimethylformamide), the concentration range is 4.7-10% (percentage by weight), and spin after 24 hours with a magnetic stirrer, and the voltage is 18kV. image 3 is an optical micrograph of a helical fiber prepared with a 5.8% PCL solution. The collection plate is located as follows: d 1 = 1cm, d 2= 11 cm, θ = 20°C, h = 3.5 cm. It can be seen that aligned helical fibers are obtained. Helical fibers with different diameters can be obtained by adjusting the concentration of the solution. Figure 4 The relationship curve of the helical diameter changing with the concentration is shown, it can be seen that the helical diameter first increases and then decreases with the increase of the concentration, and the helical fiber with a diameter in the range of 6.9-15.9 μm can be obtained in the concentration range of 4.7-10%. Especially when the diameter reac...

Embodiment 2

[0018] Preparation of PAN oriented nanohelical fibers. Dissolve PAN in DMF at a concentration of 10%, and spin after magnetic stirring for 12 hours. The spinning voltage is 23kV. The collection plate is located as follows: d 1 = 1cm, d 2 =8cm, θ=15°C, h=3cm. Image 6 It is a photograph of the prepared PAN helical fibers, it can be seen that aligned PAN helical nanofibers have been obtained. It is shown that this method is generally applicable.

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Abstract

The invention relates to an electrical spinning technology of preparing direction arrangement polymer spire nano-fiber which is characterized in building a method and a device for manufacturing the direction arrangement polymer spire nano-fiber. In the invention, the preparation of the spire fiber doesn't depend on property of material, and is a method of universal application. The method can gain spire fiber with different spire sizes and shapes, particularly can gain the spire fiber with a stereo-structure. The invention can gain the direction arrangement polymer spire nano-fiber in large acreage. The method of preparing the spire fiber is easy to be processed. The orientation technology needn't rotate a motor and also need not an ejector jet pump. And the invention also has the advantages of low cost and fitting for manufacturing in a large scale.

Description

technical field [0001] The invention is an electrospinning technology for preparing aligned polymer helical nanofibers, and the content of the invention includes innovative equipment and a preparation process. The technical field is materials science and engineering. Background technique [0002] Electrospinning (Electrospinning) is a technology that uses electrostatic force to prepare continuous nanofibers, that is, DC high voltage is applied between the polymer solution (or melt) and the fiber collection device, and the polymer solution is ejected at high speed under the action of electrostatic force. form continuous nanofibers. Electrospinning is the only way to prepare continuous polymer nanofibers, and the diameter of the prepared fibers is generally 3-500nm. In 1934, American engineer A.Formals realized the electrospinning of cellulose acetate (CA) solution under the action of electrostatic force (A.Formalas, US patent 1975504, 1934); then in 1950-1980, people succes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00
Inventor 于杰邱业君于记良嘉伟·拉非克
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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