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Method for preparing two-sided polyimide / silver compound film

A technology of polyimide and composite film, applied in the direction of coating, etc., can solve the problem that the surface of the composite film does not have metallic luster, etc., and achieve the effect of good industrialization prospects, good interface bonding performance, and good metallic luster

Inactive Publication Date: 2009-07-01
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional modified ion exchange method immerses the finished polyimide film in a strong alkali solution to hydrolyze the imide bond on its surface to form polyamic acid radicals. After cleaning, it is immersed in a soluble silver salt. In the etching layer, and combined with the amic acid group, the silver salt compound of polyamic acid is obtained. Finally, the silver is reduced and precipitated by the method of heating-induced reduction. It is necessary to raise the temperature to about 300 ° C for several hours. The surface of the film does not have a good metallic luster

Method used

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  • Method for preparing two-sided polyimide / silver compound film
  • Method for preparing two-sided polyimide / silver compound film
  • Method for preparing two-sided polyimide / silver compound film

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A: Cut the polyimide film with a thickness of 0.07mm into 80mm×100mm, ultrasonically in deionized water for 15 minutes to remove the dirt on the surface, immerse in 4mol / l potassium hydroxide solution at room temperature for 7 hours and then take it out , put the impregnated film in deionized water for 5 minutes to remove the attached potassium hydroxide;

[0034] B: Put the film treated in step A into 0.4mol / l silver nitrate solution and keep it for 5 hours, take it out and wash it;

[0035] C: Prepare 250 milliliters of potassium hydroxide solution of 0.01 mol / l, and add 10 grams of glucose (equivalent to the concentration of aldehyde group in the solution is 0.22 mol / l), immerse the film treated in step B in the reaction solution for 15 minutes After taking it out and cleaning it, a double-sided highly conductive and highly reflective polyimide / silver composite film can be obtained.

Embodiment 2

[0037] A: Cut the polyimide film with a thickness of 0.07mm into 50mm×50mm, ultrasonically in deionized water for 10 minutes to remove the dirt on the surface, immerse in 2mol / l sodium hydroxide solution at room temperature for 10 hours and then take it out , put the impregnated film in deionized water for 5 minutes to remove the attached sodium hydroxide;

[0038] B: Put the film treated in step A into 0.4mol / l silver nitrate solution and keep it for 3 hours, take it out and wash it;

[0039] C: prepare 250 milliliters of potassium hydroxide solution of 0.01mol / l, and add 5 grams of glucose (equivalent to the molar concentration of aldehyde group in the solution is 0.11mol / l), immerse the film processed in step B in the reaction solution, 45 Minutes later, take it out and wash it, and you will get a double-sided highly conductive and highly reflective polyimide / silver composite film.

Embodiment 3

[0041] A: Cut the polyimide film with a thickness of 0.07mm into 80mm×100mm, ultrasonically in deionized water for 15 minutes to remove the dirt on the surface, immerse in 4mol / l potassium hydroxide solution at room temperature for 7 hours and then take it out , put the impregnated film in deionized water for 5 minutes to remove the attached potassium hydroxide;

[0042] B: Put the film treated in step A into 0.4mol / l silver nitrate solution and keep it for 3 hours, take it out and wash it;

[0043] C: prepare 250 milliliters of potassium hydroxide solution of 0.1mol / l, and add 2 grams of glucose (equivalent to the molar concentration of aldehyde group in the solution is 0.044mol / l), the film processed by step B is immersed in the reaction solution, 15 Minutes later, take it out and wash it, and you will get a double-sided highly conductive and highly reflective polyimide / silver composite film.

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Abstract

The invention relates to a method for preparing a polyimide / silver composite film with reflectivity and electric conductivity. The method comprises the following steps: soaking a polyimide film finished product into a strong base solution, hydrolyzing a surface imide bond to generate polyamide acid radical, then soaking the polyamide acid radical into a soluble silver salt, diffusing and soaking silver ions into an etching layer to be combined with the amic acid radical to prepare a silver salt compound of polyamide acid, and finally soaking the silver salt compound of the polyamide acid into an alkali organic solution containing aldehyde group to reduce the silver ions in the etching layer and gather the silver ions on the surface so as to prepare the double-face polyimide / silver composite film with high reflectivity and high electric conductivity. The method has the advantages of good adhesive property of the film, metallic luster, excellent double-face reflectivity and electric conductivity, can be prepared at room temperature, and is nontoxic, pollution-free, easy to industrialize and the like.

Description

technical field [0001] The invention relates to a method for preparing a polyimide / silver composite film with reflectivity and conductivity on both sides, especially the preparation of high reflectivity and high conductivity on both sides through the reduction of aldehyde groups in an alkaline environment A method for durable polyimide / silver composite thin films. Background technique [0002] Polyimide / silver composite film is characterized by its excellent reflectivity (reflectivity up to 93%) and electrical conductivity (up to 6.3×10 7 (Ω·m) -1 ), coupled with the excellent thermal stability and physical and mechanical properties of the polyimide matrix itself, has become one of the multifunctional materials with great research and application value in aviation, aerospace and microelectronics technology. It has shown great application potential in many fields and can be used in: contactors in microelectronics; reflectors and concentrators on gamma-ray telescopes in spac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08J7/06C08L79/08C08K3/08
Inventor 吴战鹏杨帅奇武德珍金日光
Owner BEIJING UNIV OF CHEM TECH
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