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Nano material and application thereof, and method and device for preparing nano material

A nanomaterial and nanotechnology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve difficult problems such as the preparation of nanodevices, and achieve industrial production, easy collaboration, and simple preparation methods Effect

Inactive Publication Date: 2013-05-15
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, these technologies still have problems in precise control, and it is difficult to realize the preparation of nano-devices based on spinning

Method used

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  • Nano material and application thereof, and method and device for preparing nano material
  • Nano material and application thereof, and method and device for preparing nano material
  • Nano material and application thereof, and method and device for preparing nano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment 1 Electrospinning device

[0052] The electrospinning device of the present application is improved on the basis of the existing electrospinning device. Specifically, the spinneret and the corresponding wire-connecting plate are designed so that the working distance can be adjusted within 2 to 20 centimeters The movable structure, wherein, the diameter of the spinneret can be 100nm~1cm; in addition, an energy drive device that can provide a voltage of 5~50 kV is specially provided to provide high-voltage static electricity for electrospinning. The rest is the same as the existing electrospinning device.

[0053] The electrospinning device of this example is designed according to the special requirements for preparing the nanomaterials of the present application, and is specially used for the production of the nanomaterials of the present application. The operation is simple and convenient, and it lays the foundation for the industrial production of the nanoma...

Embodiment 2

[0055] The plasma spinning equipment of the present application adopts the plasma arc driven by direct current as the heat source to heat, melt, semi-melt, or atomize the polymer and other materials, and induce high-speed spraying on the surface of the pretreated workpiece by an electrostatic field. method. Improvement is made on the basis of the existing plasma spraying, specifically, on the basis of a conventional plasma spraying device, the spinneret and the corresponding wire-connecting plate are designed so that the working distance can be within 2~20 cm Adjustable movable structure, wherein the diameter of the spinneret can be 100nm~1cm; in addition, an energy drive device that can provide a voltage of 5~50 kV is specially provided to provide high-voltage static electricity for plasma spinning.

[0056] The electrospinning and plasma spinning devices of this example are designed according to the special requirements for preparing the nanomaterials of the present applicat...

Embodiment 3

[0058] The nanomaterials of this example were prepared from silica particles and polyvinylpyrrolidone solution. Firstly, the silica particle dispersion with a particle size of 300nm and a concentration of 10% is added to a polyvinylpyrrolidone solution with a concentration of 4% to 20% to prepare an electrospinning precursor. Wherein, the volume ratio of the silica particle dispersion to the polyvinylpyrrolidone solution is 1:2. After preparing the electrospinning precursor, use the electrospinning device of Example 1 to carry out electrospinning, such as figure 1 As shown, the injection speed is controlled by the injection pump at 1mL h -1, the control voltage is 8-18 kV, and the working distance between the wire-connecting plate and the nozzle is controlled to be 5-15 cm. After about 5 minutes, a large number of nano-materials with nano dumbbell-shaped structures can be formed on the wire-connecting plate. . The scanning electron microscope structure of the nanomaterial i...

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Abstract

The invention relates to the field of nano materials, and discloses the nano material and application of the nano material, and a method and a device for preparing the nano material. The nano material comprises a nano fiber, wherein at least two micro nano knots are arranged on the nano fiber and are formed by reuniting at least one micron or nano particle; and the nano material is mainly prepared by adding the micron or nano particles into a spinning polymer solution or a solvent by electrostatic spinning or plasma spinning. The nano material has a structure similar to a dumbbell; the integration degree and the performance of a device made of the nano material can be improved; when the device is used as an electric appliance, the charge conveying can be improved; the materials of the nano knots of the nano material can be controlled; the nano material can be designed to be a heterojunction or PN knot device; and the contact resistance of the electronic device can be effectively reduced. The nano material is suitable for the field of energy storage and power battery materials and devices, solar materials and devices, composite materials, sensors, transistors and the like.

Description

technical field [0001] The present application relates to the field of nanomaterials, in particular to a nanomaterial, the application of the nanomaterial, and a preparation method and device for the nanomaterial. Background technique [0002] Electrospinning technology is currently a conventional technology used to prepare ultrafine fibers with controllable nanostructures. The principle is that the polymer solution or melt is first charged with high voltage static electricity, and the charged polymer droplets are accelerated at the apex of the spinneret under the action of the electric field force. When the electric field force is large enough, the polymer droplets overcome the surface tension to form a jet stream. The thin stream evaporates or solidifies the solvent during the spraying process, and eventually falls on the receiving device, forming nanofibers or nanofiber mats similar to non-woven fabrics. In the electrospinning process, the droplet usually has a certain ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F1/10D01F6/52D01F6/50D01F6/56D01F6/94D01F8/10B82Y30/00D01D5/00
Inventor 薛面起潘锋
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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