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Preparing device and method for forming micro-nanofiber

A micro-nano fiber and preparation device technology, applied in fiber processing, fiber chemical characteristics, rayon manufacturing, etc., can solve problems such as inability to effectively obtain synchronization, obstruction of micro-nano fibers, and inability to prepare fibers of different diameters at the same time, to achieve improvement Yield and diameter preparation problems, the effect of simple equipment

Inactive Publication Date: 2015-03-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to effectively change the square filament diameter or obtain different spinning diameter distributions in the spinning operation, the above parameters (voltage, spinning distance, spinning solution concentration, injection flow rate and control current) must be fixed, and then the parameters must be changed. A parameter of different spinning diameters is obtained, so it is not effective to obtain simultaneous (simultaneous) spinning with different diameters
Due to the fact that the preparation of fibers with different diameter distributions needs to be matched with the change of control parameters, and it is impossible to prepare fibers with different diameters at the same time to form different diameters and spin at the same time, it also forms a certain obstacle for the industrial application of electrospinning to prepare micro-nano fibers.

Method used

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  • Preparing device and method for forming micro-nanofiber
  • Preparing device and method for forming micro-nanofiber
  • Preparing device and method for forming micro-nanofiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh 3g of polyvinyl alcohol, dissolve it in 27g of ultrapure water, and stir magnetically at 150°C for 30 minutes to obtain a transparent solution; then add 0.06g of sodium chloride and stir magnetically at 150°C for 20 minutes to obtain a pure spinning solution.

[0038] Inhale the prepared pure spinning liquid into 5mL syringes respectively, and connect the syringes to the two-hole electrospinning nozzles with the same diameter orifice device ( figure 1 shown). Connect the positive side of the high voltage power supply to the needle and the negative side to the ferrule. Adjust the flow rate of the two syringe pumps to 0.15mL / h and the receiving distance to 4cm, then turn on the high-voltage power supply and set the voltage to 15kV to collect electrospun fibers with a double yield ( figure 2 shown).

Embodiment 2

[0040] Weigh 3g of polyvinyl alcohol, dissolve it in 27g of ultrapure water, and stir magnetically at 150°C for 30 minutes to obtain a transparent solution; then add 0.06g of sodium chloride and stir magnetically at 150°C for 20 minutes to obtain a pure spinning solution.

[0041] The prepared pure spinning solution was sucked into a 5mL syringe respectively, and the syringe was connected to a four-hole electrospinning nozzle with the same diameter orifice device ( image 3 shown). Connect the positive side of the high voltage power supply to the needle and the negative side to the ferrule. Adjust the flow rate of the two syringe pumps to 0.25mL / h and the receiving distance to 4cm, then turn on the high-voltage power supply and set the voltage to 18kV to collect electrospun fibers with 4 times the yield ( Figure 4 shown).

Embodiment 3

[0043] Weigh 3 g of polyvinyl alcohol, dissolve it in 27 g of ultrapure water, and stir it magnetically at 150° C. for 30 min to obtain a pure spinning solution.

[0044] Inhale the prepared pure spinning liquid into 5mL syringes respectively, and connect the syringes to the four-hole electrospinning nozzles with different diameter nozzles through silicone tubes ( Figure 5 shown). Connect the positive side of the high voltage power supply to the needle and the negative side to the ferrule. Adjust the flow rate of the two syringe pumps to 0.1mL / h and the receiving distance to 6cm, then turn on the high-voltage power supply and set the voltage to 18kV to collect electrospun fibers with different diameters at the same time ( Figure 6 shown).

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Abstract

The invention provides a preparing device and method for forming micro-nanofiber, and belongs to the field of biological materials and tissue engineering. An electrostatic spinning sprayer is provided with different holes arranged side by side, an appropriate amount of original electricity texture liquid is injected into the electrostatic spinning sprayer through a micro-injection pump, a plurality of taylor cones are formed by the parallel spraying holes in the electrostatic spinning sprayer at the same time through externally added high voltage, and therefore the different sizes of original electricity texture yarns can be obtained through the single step, the yield of the original electricity texture yarns is effectively increased, and the micro-nanofiber is prepared. By means of the method for electrostatic spinning, and the electrostatic spinning yield can be increased and is obviously higher than that of single-needle electrostatic spinning; the effective means for adjusting the diameter of the spinning fiber is provided, the uniform micro-nanofiber or micro-nanofiber with different sizes can be prepared, the range of the diameter of the fiber can be controlled to range from 50 nm to 1 mm, and the problem of the productivity and size adjusting in the related fields of the electrostatic spinning micro-nanofiber is effectively solved.

Description

technical field [0001] The invention belongs to the field of electrospinning micro-nano fiber engineering, and relates to a preparation method of nano-fibers and a technology for preparing different micro-nano fibers by electrospinning nozzle electrostatic spinning technology. Background technique [0002] Electrospinning technology is one of the methods for preparing micro-nano fibers, and the diameter of the prepared fibers can reach nanometer scale. The electrospinning system mainly includes the following parts: high voltage source, nozzle needle, and ground collector. The key principle of electrospinning is to apply a high voltage to the polymer solution, so that the polymer solution forms a Taylor cone at the nozzle nozzle. As the voltage continues to increase, the charged liquid forms a jet at the tip of the Taylor cone. As the jet falls, fibers are formed as the solvent evaporates and fall onto the collector due to electrostatic forces. The collected polymer film f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00D01F6/50D01F1/10D01F1/06
CPCD01D5/0069D01D5/0015D01F1/06D01F1/10D01F6/14D01F6/50
Inventor 张明暐趙鼎李劲松高园黄珒王宝霖
Owner ZHEJIANG UNIV
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