Method for preparing high-efficiency electrothermal film

An electric heating film, high-efficiency technology, applied in the direction of electric heating devices, ohmic resistance heating, electrical components, etc., can solve the problems of poor compatibility, electric heating power attenuation, low electric heating conversion efficiency of electric heating film, etc., to achieve rich space structure and expand space capacity Effect

Inactive Publication Date: 2019-03-29
刘凡领
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main technical problem to be solved by the present invention is that the current ordinary electrothermal film is made by compounding a polymer material matrix and a carbonaceous filler, and the poor compatibility between the carbonaceous filler and the polymer material matrix leads to low electrothermal conversion efficiency of the electrothermal film. The obvious defect of electrothermal power attenuation provides a preparation method of high-efficiency electrothermal film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026]Weigh the wheat bran and put it into the steam explosion tank, heat the tartaric acid solution with a mass fraction of 30% to 220°C to form steam and pass it into the steam explosion tank, seal the tank mouth until the pressure in the steam explosion tank reaches 2MPa, keep constant temperature and pressure After standing still for 45 minutes, open the discharge valve, so that the material in the tank is injected into the receiving tank instantaneously, collect the material in the receiving tank, and obtain the steam-exploded wheat bran fiber; put the obtained steam-exploded wheat bran fiber into the carbonization furnace, Heating to 300°C under the protection of air, keeping the carbonization for 1 hour to obtain wheat bran carbon fiber, mixing the wheat bran carbon fiber and polyvinyl alcohol solution with a mass fraction of 30% according to the mass ratio of 1:5, placing it on a shaker and oscillating and impregnating it for 1 hour After shaking and impregnating, the f...

example 2

[0028] Weigh the wheat bran and put it into the steam explosion tank, heat the tartaric acid solution with a mass fraction of 30% to 225°C to form steam and pass it into the steam explosion tank, seal the tank mouth until the pressure in the steam explosion tank reaches 2MPa, keep constant temperature and pressure After standing still for 50 minutes, open the discharge valve, so that the material in the tank is injected into the receiving tank instantaneously, collect the material in the receiving tank, and obtain the steam-exploded wheat bran fiber; put the obtained steam-exploded wheat bran fiber into the carbonization furnace, Heating up to 350°C under gas protection, and carbonizing wheat bran for 1.5 hours to obtain wheat bran carbon fibers, mixing wheat bran carbon fibers and polyvinyl alcohol solution with a mass fraction of 30% at a mass ratio of 1:5, placing them on a shaker for oscillating impregnation After 1.5 hours of shaking and impregnation, filter and separate t...

example 3

[0030] Weigh the wheat bran into the steam explosion tank, heat the tartaric acid solution with a mass fraction of 30% to 230°C to form steam and pass it into the steam explosion tank, seal the tank mouth until the pressure in the steam explosion tank reaches 3MPa, keep constant temperature and pressure After standing still for 60 minutes, open the discharge valve, so that the material in the tank is injected into the receiving tank instantaneously, collect the material in the receiving tank, and obtain the steam-exploded wheat bran fiber; put the obtained steam-exploded wheat bran fiber into the carbonization furnace, Heating up to 400°C under air protection, and carbonizing wheat bran for 2 hours to obtain wheat bran carbon fibers, mixing wheat bran carbon fibers and polyvinyl alcohol solution with a mass fraction of 30% at a mass ratio of 1:5, placing them on a shaker for oscillating and impregnating for 2 hours After shaking and impregnating, the filter residue was obtained...

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Abstract

The invention discloses a method for preparing high-efficiency electrothermal film and belongs to the technical field of electrothermal materials. The method includes firstly subjecting wheat bran fibers to steam explosion, and therefore, a pressure difference occurs inside fibers in pressurization and instantaneous pressure release processes under a condition of ensuring physical and mechanical properties and complete appearance of fibers, and furfural among the fibers are condensed and polycondensed, thus anchoring and bonding adjacent fibers. Carbonized fibers are mixed and soaked with a polyvinyl alcohol solution so that polyvinyl alcohol is adsorbed and fixed in rich pores of the carbon fibers, thus increasing the electrothermal conversion efficiency of the electric heating film and avoiding attenuation of the electric heating power. The carbon fibers and the metal salt are fully mixed by microwave action to prepare a carbon fiber-metal particle self-made carbonaceous filler withstable properties, the structure of nanometer carbon between the interface of the metal particles and the carbon fibers is a graphite structure, thus increasing conductivity of the carbonaceous filler, and facilitating improvement in electrothermal conversion efficiency of the carbonaceous filler. The method has a broad application prospect.

Description

technical field [0001] The invention discloses a preparation method of a high-efficiency electrothermal film, belonging to the technical field of electrothermal materials. Background technique [0002] Electric heating film is divided into high temperature and low temperature electric heating film. High-temperature electric heating film is generally used in electronic appliances, military, etc., and now the electric heating film produced by science and technology. Low-temperature electric heating film is a translucent polyester film that can generate heat after being energized. It is made of conductive special ink and metal current-carrying strips, which are processed and hot-pressed between insulating polyester films. When working, the electric heating film is used as the heating body, and the heat is sent into the space in the form of radiation, so that the human body and objects are warmed first, and its comprehensive effect is better than the traditional convection heat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D123/06C09D123/08C09D7/62C09D7/63H05B3/14H05B3/18H05B3/20B29C41/00
CPCB29C41/003B29L2007/002C09D123/06C09D7/62C09D7/63H05B3/145H05B3/18H05B3/20C08L23/0853C08K9/08C08K9/00C08K7/06C08K5/14C08K13/06Y02B30/00
Inventor 刘凡领丁春美王素香
Owner 刘凡领
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