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Insulating material as well as preparation method and application thereof

A technology of insulating materials and composite slurry, applied in the direction of additive processing, etc., can solve the problems of low curing thickness, interlayer peeling, low quality, etc., and achieve the effect of high mechanical strength, fast curing speed and simple operation

Active Publication Date: 2022-08-05
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when an excessive amount of particle filler is introduced into the photosensitive resin, it will cause poor UV transmittance and too low curing thickness, which will cause printing failures such as base plate peeling and interlayer peeling. Therefore, high-filling composite materials have always been a problem that plagues 3D printing.
[0004] The low quality and high aspect ratio of carbon nanotube fillers make the non-linear permeation threshold required as filler particles lower, and there will be no sedimentation phenomenon after long-term storage, but pure carbon nanotube nanofillers have good electrical conductivity and can be used in resins. It is easy to agglomerate in the matrix and has poor compatibility with the matrix, which leads to a serious deterioration of the breakdown field strength of the composite dielectric

Method used

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  • Insulating material as well as preparation method and application thereof
  • Insulating material as well as preparation method and application thereof
  • Insulating material as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0053] see figure 1 , an insulating material preparation method of the present invention, comprising the following steps:

[0054] S1, carry out plasma fluorination treatment to the carbon nanotubes of drying, obtain nonlinear conductivity fluorinated carbon nanotubes, add acetone and photosensitive resin successively to nonlinear conductivity fluorinated carbon nanotubes, and stir with a medicine spoon , to obtain mixture A;

[0055] The nonlinear conductivity photosensitive resin-based composite paste is prepared from carbon nanotubes, photosensitive resin and acetone treated by plasma fluorination, and the mass ratio of the nonlinear conductivity fluorinated carbon nanotubes to the photosensitive resin is (0.3-0.6 ): 100; the mass ratio of acetone to the photosensitive resin matrix is ​​1: (3-5).

[0056] Among them, the fluorine content of the fluorinated carbon nanotubes is controlled by the time of the plasma fluorination treatment.

[0057] Carbon nanotubes are one o...

Embodiment 1

[0065] The multi-walled carbon nanotubes are dried, and the dried multi-walled carbon nanotubes are subjected to plasma fluorination treatment for 20 minutes. 1.6 grams of acetone, finally add 8 grams of photosensitive resin, stir with a spatula to prepare mixtures with mass fractions of 0%, 0.3%, 0.5%, and 0.6%, respectively, and then ultrasonically treat the mixture at a water temperature of 60 °C, make it evenly mixed;

[0066] After 5 hours, take out the mixture after ultrasonic stirring, put it into a vacuum drying oven, and treat it at 75 °C for 10 minutes. After 10 minutes, take out a part of the mixture and pour it into a silica gel mold. The wavelength is 405 nm and the power is 30 mW / cm. 2 The samples were made by curing under the ultraviolet light for 20 minutes, and the variation curve of the conductivity with the field strength of the samples with different mass fractions was measured.

[0067] The remaining part of the mixture was poured into a 5mm deep Teflon m...

Embodiment 2

[0070] The multi-walled carbon nanotubes were dried, and the dried multi-walled carbon nanotubes were subjected to plasma fluorination treatment for 10 minutes. 1.6 grams of acetone, finally add 8 grams of photosensitive resin, stir with a spatula to prepare mixtures with mass fractions of 0%, 0.3%, 0.5%, and 0.6%, respectively, and then ultrasonically treat the mixture at a water temperature of 40 °C, make it evenly mixed;

[0071] After 7 hours, the ultrasonically stirred mixture was taken out, put into a vacuum drying oven, and treated at 60 °C for 40 minutes, and then a part of the mixture was taken out and poured into a silica gel mold. The wavelength was 405 nm and the power was 120 mW / cm. 2 The samples were made by curing under high UV light for 5 minutes, and the variation curve of the conductivity with the field strength of the samples with different mass fractions was measured;

[0072] The remaining part of the mixture was poured into a 5mm deep PTFE mold, and then...

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Abstract

The invention discloses an insulating material and a preparation method and application thereof.A certain content of fluorinated carbon nanotube powder is evenly dispersed into a photosensitive resin matrix, the conductivity of the obtained composite material has electric field dependence, and when the electric field intensity is low, the composite material shows good insulating characteristics and is low in conductivity; along with the increase of the electric field intensity, the conductivity has a nonlinear increase trend. The composite slurry provided by the invention has good light transmission and anti-settling characteristics, an insulating material which is uniform in electric field distribution, high in mechanical strength and complex in structure is obtained through photocuring 3D printing, and the purposes of inhibiting partial discharge of electrical equipment and promoting miniaturization of the equipment are achieved; furthermore, by controlling the filling mass fraction and fluorination degree of the fluorinated carbon nanotube filler, precise regulation and control of the nonlinear conductivity characteristic of the composite material can be realized, and the method has great research value and application prospect.

Description

technical field [0001] The invention belongs to the technical field of insulating materials, and in particular relates to an insulating material and a preparation method and application thereof. Background technique [0002] In high-voltage electrical equipment, the insulating structure is an important part. Due to the high voltage level, the electric field distribution in the insulating structure is prone to distortion, making the local electric field intensity much higher than the average electric field intensity, often causing partial discharge or flashing along the surface. The occurrence of the network will lead to the breakdown of the insulating structure, which will lead to the failure of the entire power equipment and even the power system. The nonlinear conductivity material can adjust the conductivity adaptively according to the applied electric field, so as to homogenize the local electric field and reduce the probability of partial discharge phenomenon. [0003]...

Claims

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Application Information

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IPC IPC(8): C08L101/00C08K7/24C08K9/00C08J3/28C08J3/24B33Y70/10
CPCC08J3/28C08J3/24B33Y70/10C08J2300/00C08K7/24C08K9/00
Inventor 葛凯颖张冠军王超李文栋张宇程
Owner XI AN JIAOTONG UNIV
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