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Large-scale magnetic spinning equipment and method using equipment for manufacturing micro-nano-meter fibers

A micro-nano fiber, large-scale technology, applied in fiber processing, fiber chemical characteristics, complete sets of equipment for the production of artificial threads, etc., can solve the problem that the controllability of fiber diameter needs to be further improved, restrict the popularization and application of electrospinning technology, The problem of high liquid conductivity requirements can achieve the effect of low spinning cost, reduced production cost and safety hazards, and simple and easy-to-obtain equipment.

Active Publication Date: 2015-09-02
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, although the multi-needle electrospinning nanofiber preparation technology increases the number of jets to obtain a larger fiber yield, due to the high-voltage potential enrichment, when the voltage is higher than 30,000 volts, a "glow discharge" will be formed at the tip of the needle, which is harmful to spinning. The process causes mutual interference, and the prepared nanofiber film is uneven; the needle-free electrospinning technology is proposed under the idea of ​​increasing the liquid surface area and improving the fiber yield. International patent WO2005024101 reports a needle-free electrospinning equipment. The equipment soaks the drum-shaped electrode (fiber generator) in the polymer solution, and rotates the drum electrode so that the polymer solution is evenly loaded on the entire drum surface
Nanofibers can be obtained on the fiber collector when the loaded polymer solution is placed in the electric field formed by the drum electrodes and the fiber collector, and the electric field is strong enough to make the liquid on the drum surface form a Taylor cone, which completely eliminates the spinning process. The limitation of the silk nozzle greatly improves the production efficiency of electrospinning, but the disadvantage is that this method has strict requirements on the spinning liquid and requires a large electric field strength. The drum electrode is soaked in an open polymer solution tank, and the solvent pole Volatile, causing environmental pollution
The linear nozzle replaces the design of the traditional spinning nozzle, which avoids the occurrence of needle clogging. At the same time, the device has a simple structure and does not require additional atmosphere and auxiliary equipment. The production environment is friendly, but the controllability of the fiber diameter needs to be further improved.
However, these electrospinning devices have the following problems in popularization and application: (1) Traditional electrospinning devices usually use DC high-voltage power supply to provide the high-voltage electrostatic field required for spinning, and the working voltage of spinning is as high as tens of thousands of volts or even more than ten 10,000 volts, not only causes certain hidden dangers to operators, but also increases the cost of large-scale industrial production; (2) The electrospinning method has high requirements on the conductivity of the spinning solution, and it needs to add additional high-conductivity materials for blending and spinning, and Post-processing is required to obtain high-purity nanofibers, which is costly and time-consuming; (3) Nanofibers prepared by electrospinning exist in the form of non-woven fabrics, and the fiber arrangement is very messy, which restricts the application of electrospinning technology in biomedicine and conductive materials. And the promotion and application of sensors and other fields

Method used

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  • Large-scale magnetic spinning equipment and method using equipment for manufacturing micro-nano-meter fibers
  • Large-scale magnetic spinning equipment and method using equipment for manufacturing micro-nano-meter fibers
  • Large-scale magnetic spinning equipment and method using equipment for manufacturing micro-nano-meter fibers

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Experimental program
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Embodiment 1

[0027] Such as figure 1 Shown, a kind of large-scale magnet spinning equipment comprises support 11, can control the feeding device of feed rate, spinning injection device and the drum type collection device that horizontally arranges, and the collection drum 9 of described drum type collection device is installed on On the support 11, the collecting drum 9 is connected with the output shaft of the brushless DC motor 5 for linkage, the central axes of the collecting drum 9 and the output shaft of the brushless DC motor 5 coincide, and the brushless DC motor 5 is electrically connected to the power supply and the motor speed control Motor controller 10, the surface of described collection cylinder 9 is fixed with the strip permanent magnet 8 that provides magnetic field, and the major axis of described strip magnet 8 is parallel with the central axis of collection cylinder 9, and described spinning injection device is provided with multiple A spinning nozzle 3, the plurality of...

Embodiment 2

[0030] The method for preparing micro-nano fibers using the large-scale magnetic spinning equipment of embodiment 1 may further comprise the steps:

[0031] (1) Preparation of ferrofluid spinning solution: select sodium dodecylbenzene sulfonate as surfactant, and γ-Fe with a diameter of 20 nanometers 2 o 3 Disperse the magnetic nanoparticles into chloroform, add surfactants with the same quality as the magnetic nanoparticles, and prepare γ-Fe 2 o 3 Magnetic nanoparticles mass fraction is 11.5% ferrofluid solution; select water and dehydrated alcohol (volume ratio 70 / 30) as solvent, preparation mass fraction is 10% polyoxyethylene (molecular weight is 400000) solution, water bath is heated to Stir at 60°C for 2 hours to obtain a uniform polymer solution; mix the ferrofluid solution and the polymer solution at a ratio of 1:1 to make a ferrofluid spinning solution.

[0032] (2) Preparation of micro-nanofibers: inject the magnetic fluid spinning solution prepared in step (1) in...

Embodiment 3

[0034] The method for preparing micro-nano fibers using the large-scale magnetic spinning equipment of embodiment 1 may further comprise the steps:

[0035] (1) Preparation of ferrofluid spinning solution: select sodium dodecylbenzene sulfonate as surfactant, and γ-Fe with a diameter of 20 nanometers 2 o 3 Disperse the magnetic nanoparticles into chloroform, add surfactants with the same quality as the magnetic nanoparticles, and prepare γ-Fe 2 o 3 Magnetic nanoparticle mass fraction is 11.5% ferrofluid solution; Select chloroform as solvent, prepare the polyvinylidene fluoride (molecular weight 270000) solution that mass fraction is 25%, water bath is heated to 60 ℃, stirs 2 hours, obtains uniform high Molecular solution; mix ferrofluid solution and polymer solution at a ratio of 1:1 to make ferrofluid spinning solution.

[0036] (2) Preparation of micro-nanofibers: inject the magnetic fluid spinning solution prepared in step (1) into the syringe needle 1, turn on the micr...

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Abstract

The invention discloses large-scale magnetic spinning equipment and a method using the equipment for manufacturing micro-nano-meter fibers. The equipment comprises a support, a feeding device, a spinning spraying device and a roller type collecting device horizontally arranged. Bar-shaped permanent magnets for providing a magnetic field are fixed to the surface of a collecting roller of the roller type collecting device. The spinning spraying device is provided with a plurality of spinning spraying heads which are uniformly arranged in a column. Injection orifices of the spinning spraying heads point to the bar-shaped permanents of the surface of the collecting roller. The spinning spraying device further comprises a spraying head drive mechanism which can drive the spinning spraying heads to do reciprocating motion in the center axis direction of the collecting roller. According to the equipment, magnetic field force replaces electric field force, under the effect of the alternating magnetic field, ferrofluid is stretched to manufacture the magnetic micro-nano-meter fibers, the high-voltage effect is not needed in the whole process, the production cost and the potential safety hazards are reduced effectively, the micro-nano-meter fibers can be produced continuously in batches, the manufactured fibers are arranged orderly, the yield is high, and the magnetic spinning equipment is suitable for mass production.

Description

technical field [0001] The invention relates to a preparation device for micro-nano fibers, in particular to a large-scale magnetic spinning device and a method for preparing micro-nano fibers with the device. Background technique [0002] One-dimensional nanofibers refer to two-dimensional nanoscale linear materials on the three-dimensional spatial scale, which have high porosity, large specific surface area, large length / diameter ratio, and different electrical, magnetic, Physical and chemical properties such as force, heat, and light have broad applications in many fields such as nanoelectronic devices, air filtration, sensors, and biomedicine. With the continuous development of the application technology of nanofiber materials in various fields, the preparation technology of nanofiber materials has also been further developed and researched. At present, the preparation methods of nanofibers mainly include stretching method, template method, phase separation method, self...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D13/00D01D5/00D01F8/06D01F8/10D01F8/14D01F1/10
Inventor 龙云泽董瑞华闫旭李金涛魏代善于桂凤贺晓晓犹明浩管殿柱
Owner QINGDAO UNIV
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