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Synthesis of carbon material-polyimide composite film

A polyimide and composite film technology, applied in the field of composite film synthesis, can solve the problems of static charge accumulation, unsatisfactory antistatic effect, burning, explosion, etc.

Inactive Publication Date: 2016-06-08
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve this electrostatic charge accumulation problem, the method that has been used or is being used so far is to fill the polyimide film with conductive materials, such as graphite, carbon black, metal powder, metal fiber, metal alloy, inorganic electrolyte and metal oxide. Conductive substances such as polyimide, but they are all added with one substance alone, and its antistatic effect is not ideal. In the process of production and use of polyimide film, it is still prone to combustion and explosion accidents caused by static charge accumulation.

Method used

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  • Synthesis of carbon material-polyimide composite film
  • Synthesis of carbon material-polyimide composite film
  • Synthesis of carbon material-polyimide composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 Add 25ml of DMAC to a 100ml round bottom flask, add 0.8% graphene, then add 1% and acidified carbon nanotubes respectively, sonicate until there are no obvious particles, add 2.00g ODA, stir for 10min, and then divide it several times within 1h Slowly add 2.22g of PMDA, and mechanically stir for 5.5h to obtain a polyamic acid (PAA) solution whose color gradually darkens. Cast a film on a clean glass plate, place the film in an oven at 80, 100, 120, and 150°C to form the film, and soak it in distilled water. The film was fixed on a stainless steel iron frame, and placed in a muffle furnace for temperature programming, 100, 150, 200, 250, and 300°C for 1 hour each. Cool naturally to room temperature to obtain a polyimide / carbon material composite film.

[0021] figure 2 The effect of 0.8% graphene and 1% acidified carbon nanotubes on the surface resistivity of polyimide films. The figure shows that the filling of 0.8% graphene and 1% acidified carbon nanotub...

Embodiment 2

[0022] Example 2 A polyimide-carbon composite film was prepared by ultrasonic dispersion-in-situ polymerization. Add 25ml DMAC in a 100ml round bottom flask, add 0.8% graphene (at this ratio, the comprehensive performance of a single composite film is the best), then add 2% acidified carbon nanotubes respectively, sonicate until there are no obvious particles, add 2.00gODA , stirred for 10 min, then slowly added 2.22 g PMDA in 1 h several times, and mechanically stirred for 5.5 h to obtain a polyamic acid (PAA) solution with gradually darker color. Cast a film on a clean glass plate, place the film in an oven at 80, 100, 120, and 150°C to form the film, and soak it in distilled water. The film was fixed on a stainless steel iron frame, and placed in a muffle furnace for temperature programming, 100, 150, 200, 250, and 300°C for 1 hour each. Cool naturally to room temperature to obtain a polyimide / carbon material composite film.

[0023] image 3 The effect of 0.8% graphene ...

Embodiment 3

[0024] Example 3 A polyimide-carbon composite film was prepared by ultrasonic dispersion-in-situ polymerization. Add 25ml DMAC in a 100ml round bottom flask, add 0.8% graphene (at this ratio, the comprehensive performance of a single composite film is the best), then add 3% acidified carbon nanotubes respectively, sonicate until there are no obvious particles, add 2.00gODA , stirred for 10 min, then slowly added 2.22 g PMDA in 1 h several times, and mechanically stirred for 5.5 h to obtain a polyamic acid (PAA) solution with gradually darker color. Cast a film on a clean glass plate, place the film in an oven at 80, 100, 120, and 150°C to form the film, and soak it in distilled water. The film was fixed on a stainless steel iron frame, and placed in a muffle furnace for temperature programming, 100, 150, 200, 250, and 300°C for 1 hour each. Cool naturally to room temperature to obtain a polyimide / carbon material composite film.

[0025] Figure 4 The effect of 0.8% graphene...

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Abstract

The invention discloses synthesis of a carbon material-polyimide composite film, relates to synthesis of composite film, and especially relates to synthesis of a novel polyimide composite film. Polyimide film belongs to the insulation materials, has a high resistivity, and can easily generate a large amount of static charges during the process of large-scale production; while the accumulated charges can easily trigger accidents such as combustion, explosion, and the like. The invention aims to eliminate the static charges, which are generated during the processes of production and application of polyimide films. In the production technology of polyimide film, DMAC is taken as the solvent, graphene and acidified carbon nanotubes are added according to different ratios, and in-situ polymerization reactions are carried out to generate a series of novel polyimide composite films. The method has the characteristics of novelty, simple operation, short time, and environment-friendliness. At the same time, the composite film has excellent comprehensive properties, and can be applied to many antistatic facilities.

Description

technical field [0001] The invention relates to the synthesis of a composite film, in particular to the synthesis of a specifically designed novel polyimide composite film. Background technique [0002] The development of polyimide film has a history of more than 50 years so far, from the earliest isotropic polyimide film (Kapton) of DuPont in the United States to countless varieties and styles now. According to statistics, there are 200-300 kinds of dianhydrides and diamines used to synthesize polyimides, and thousands of kinds of polyimides have been synthesized and studied. Polyimide film is an insulating material with high resistivity. It is easy to generate a large amount of static charge accumulation in large-scale production, which will cause dangerous accidents such as combustion and explosion. In order to solve this electrostatic charge accumulation problem, the method that has been used or is being used so far is to fill the polyimide film with conductive material...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L79/08C08G73/10C08K7/24C08K3/04
Inventor 邓宝祥李佩佩钟经德
Owner TIANJIN POLYTECHNIC UNIV
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