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Ultrasonic atomization assisted electrospinning technique

An electrospinning technology and ultrasonic atomization technology, applied in the field of ultrasonic atomization-assisted electrospinning technology, can solve problems such as easy clogging of spinning nozzles, low proportion of additives, uneven mixing of nanoparticles/fiber membranes, etc. Achieve improved physical and chemical properties, excellent water resistance, and good strength

Inactive Publication Date: 2016-05-11
DALIAN UNIV OF TECH
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Problems solved by technology

[0003] Aiming at the problems of conventional electrospinning technology in the electrospinning process, nanoparticles are easy to block the spinning nozzle, the prepared nanoparticle / fiber film is not uniformly mixed, and the ratio of additives is not high, a ultrasonic atomization-assisted electrospinning method is proposed. Technology, through the combination of ultrasonic atomization and electrospinning technology to achieve uniform mixing of nanoparticles in polymer fibers

Method used

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  • Ultrasonic atomization assisted electrospinning technique
  • Ultrasonic atomization assisted electrospinning technique

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Embodiment 1

[0016] Dissolve polyacrylonitrile (Mw=150,000) in dimethylacetamide to prepare an electrospinning solution with a concentration of 10wt.%. Take 20mL of the polyacrylonitrile solution and place them in two 10mL syringes respectively. Take 200mL of the concentration as 2 mg / mL graphene oxide solution in an ultrasonic nebulizer. Graphene oxide was obtained by ultrasonic atomization-assisted electrospinning under the conditions that the inner diameter of the needle is 0.2mm, the voltage between the needle and the receiver is 22kV, the distance is 13cm, the propulsion speed is 0.8L / h, and the ultrasonic atomization power is 50W. Composites with polyacrylonitrile fibers, operating modes such as figure 1 As shown, the obtained graphene oxide and polyacrylonitrile composite film is as follows figure 2 Shown, wherein the addition ratio of graphene oxide is 10%.

Embodiment 2

[0018] Dissolve polyvinylpyrrolidone in dimethylformamide solvent to prepare an electrospinning solution with a mass fraction of 10wt.%, then weigh a certain amount of carbon nanotubes and put them into dimethylacetamide with a mass fraction of 2wt.%, and Thoroughly stir and ultrasonically disperse to obtain 400 mL of uniformly dispersed carbon nanotube dispersion. Electrospinning process parameters: the volume of the syringe is 10mL, the inner diameter of the needle is 0.2mm, the voltage between the needle and the receiver is 22kV, the distance is 15cm, and the advancing speed of the electrospinning liquid is 0.8L / h. At the same time, start the ultrasonic atomization device to atomize the carbon nanotubes into the electrospun membrane. At the same time, according to the needs, realize the uniform mixing of the carbon nanotubes and the polyvinylpyrrolidone film, and the addition ratio of the carbon nanotubes is 10%.

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Abstract

The invention discloses an ultrasonic atomization assisted electrospinning technique and belongs to the field of preparation and applications of nano materials. According to the technique, prepared graphene, graphene oxide, carbon nano tubes and other nanoparticles are dispersed in a storage tank of an ultrasonic atomizer, atomization spraying of the nanoparticles is realized, and the problem of nanoparticle blocking caused with a conventional mixing method is solved. Ultrasonic atomization and electrospinning techniques are combined for use, a prepared nanoparticle polymer composite film has uniformly mixed nanoparticles, and agglomeration is not easily caused. The polymer fiber film prepared with the technique has high separation efficiency, good strength and excellent water resistance, and the physical and chemical properties of the composite film material are improved. Compared with a conventional electrospinning technique, graphene and the carbon nano tubes can be mixed in any ratio, the conventional blocking problem of an electrospinning sprayer is solved, and the technique has important application prospect in environment treatment and electrode material preparation.

Description

technical field [0001] The invention relates to an ultrasonic atomization-assisted electrospinning technology, which belongs to the technical field of nano-material preparation, and specifically designs graphene oxide, graphene, carbon nanotubes, and modified carbon nanotubes under the action of ultrasonic atomization to It is spun into the polymer precursor, so as to achieve its uniform mixing to prepare composite membrane materials, which is of great significance in the fields of adsorption and separation, electrode material preparation and other fields. Background technique [0002] There are many methods for preparing nanofibrous membranes, such as template synthesis, phase separation, self-assembly, and stretching. These methods still have certain limitations. Electrospinning technology is a method that can directly and directly prepare polymer nanofiber membranes, and can modify, strengthen, and modify pure spinning membranes by adding additives such as graphene and c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00D01F1/10
CPCD01D5/003D01D5/0061D01F1/10
Inventor 王刚邱介山董强
Owner DALIAN UNIV OF TECH
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