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Orientation nanofiber and preparing method thereof

A nanofiber, orientation technology, applied in fiber processing, stretch spinning, textile and papermaking, etc., can solve the problems of potential safety hazards, maximum adjustable strength limit, low safety factor, etc., to improve spinning fluency and Effects of production efficiency, improved orderliness, and spinning process safety

Inactive Publication Date: 2018-02-23
GUANGZHOU SUN SHING BIOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The maximum adjustable strength of the electrostatic field is limited by the insulation strength of the air, and when it is higher than this limit, discharge occurs between the electrodes, and there are safety hazards in the production process
In view of the above and the achievable spinning polymer solution concentrations, it is possible to process about 0.1 g to 1 g of polymer in one spinneret in one hour, while the spinning process requires high voltages to produce nanofibers. There are problems such as low yield and low safety factor in the process
On the other hand, most of the nanofibers prepared by the above method are arranged randomly, showing a disordered state.

Method used

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  • Orientation nanofiber and preparing method thereof
  • Orientation nanofiber and preparing method thereof
  • Orientation nanofiber and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An embodiment of the preparation method of the oriented nanofiber of the present invention, the preparation method of the oriented nanofiber described in this embodiment is:

[0029] Polylactic acid is dissolved in methylene chloride, and the concentration of polylactic acid in the polylactic acid solution obtained is 4w / v%; the Fe 3 o 4 Nanoparticles were added to the prepared polylactic acid solution, and the Fe 3 o 4 Evenly dispersed in the polylactic acid solution to form a spinning solution, Fe 3 o 4 The mass fraction of nanoparticles in the spinning solution is 5%; the spinning solution is placed in an external magnetic field, and gas is injected into the spinning solution. The flow rate of the gas is 10m / s. In the external magnetic field, the bubbles burst to generate a jet, the jet stretches and deforms, the residual methylene chloride volatilizes, and solidifies to form oriented nanofibers; vacuum drying for 48 hours obtains the final oriented nanofibers. ...

Embodiment 2

[0031] An embodiment of the preparation method of the oriented nanofiber of the present invention, the preparation method of the oriented nanofiber described in this embodiment is:

[0032] Polycaprolactone is dissolved in dimethyl sulfoxide, and the polycaprolactone concentration in the gained polycaprolactone solution is 8w / v%; Gamma-Fe 2 o 3 The nanoparticles were added to the prepared polycaprolactone solution, and the γ-Fe 2 o 3 The nanoparticles are uniformly dispersed in the polycaprolactone solution to form a spinning solution, γ-Fe 2 o 3 The mass fraction of nanoparticles in the spinning solution is 5%; the spinning solution is placed in an external magnetic field, and gas is injected into the spinning solution, and the flow rate of the gas is 50m / s. In the external magnetic field, the bubbles burst to generate a jet, the jet stretches and deforms, the residual dimethyl sulfoxide volatilizes, and solidifies to form oriented nanofibers; vacuum drying for 48 hours o...

Embodiment 3

[0034] An embodiment of the preparation method of the oriented nanofiber of the present invention, the preparation method of the oriented nanofiber described in this embodiment is:

[0035] Polyethylene lactide was dissolved in trifluoroethanol, and the polyethylene lactide concentration in the obtained polyethylene lactide solution was 12w / v%; nickel nanoparticles were added to the prepared polyethylene lactide solution, and the The homogenizer uniformly disperses the nickel magnetic nanoparticles in the polyethylene lactide solution to form a spinning solution, the mass fraction of the nickel magnetic nanoparticles in the spinning solution is 5%; the spinning solution is placed in an external magnetic field, and Inject gas into the spinning solution, the flow rate of the gas is 100m / s, disturb the spinning solution to generate bubbles, in the external magnetic field, the bubbles burst to generate jets, the jets are stretched and deformed, and the residual trifluoroethanol vol...

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Abstract

The invention discloses orientation nanofiber and a preparing method thereof. Through the combination of air current spinning and magnetic field force, the motion track of spinning solution jet flow is controlled, and producing the orientation nanofiber is achieved. A high pressure static electricity generating device is not needed, the orientation nanofiber is simple and economical, static electricity pollution and potential danger caused by high voltage static electricity are also avoided, the spinning process is safer and more stable, multiple strands of jet flow can be generated simultaneously, the spinning smoothness and production efficiency are drastically improved, and the preparing method is applicable to producing the orientation nanofiber in an industrialized mode.

Description

technical field [0001] The invention relates to a preparation method of nanofibers, in particular to an oriented nanofiber and a preparation method thereof. Background technique [0002] Polymer fibers with a diameter of 10nm to 1000nm have many special properties. This type of polymer fiber layer has high filtration efficiency and can be used as a barrier material for filtering gases and liquids and retaining submicron particles, bacteria and chemicals; Used as battery separators and composite reinforcement materials; used as drug carriers and tissue implant carriers in the medical field; the high specific surface area of ​​nanofibers determines its special adsorption properties, such as the use of catalyst carriers. [0003] Nanofibers can be made from a wide range of polymers, polymer blends and blends of polymers with low molecular weight additives by polymer solution processing, smaller diameters can be obtained by solution processing due to lower solution viscosity of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/12D01D5/00
CPCD01D5/12D01D5/00
Inventor 谭睿哲邹鹏杨习锋曾晨光
Owner GUANGZHOU SUN SHING BIOTECH CO LTD
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