Preparation method for core-shell type polyimide@metal/metal oxide/metal sulfide composite microballoons

A technology of metal sulfide and polyimide, which is applied in the field of preparation of core-shell polyimide metal/metal oxide/metal sulfide composite microspheres, and can solve problems such as no core-shell structure composite microspheres , to achieve the effect of good industrialization prospect, good thermal stability and simple process

Inactive Publication Date: 2015-05-06
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no core-shell composite microspheres prepared with polyimide microspheres as the core

Method used

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  • Preparation method for core-shell type polyimide@metal/metal oxide/metal sulfide composite microballoons
  • Preparation method for core-shell type polyimide@metal/metal oxide/metal sulfide composite microballoons
  • Preparation method for core-shell type polyimide@metal/metal oxide/metal sulfide composite microballoons

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A: Add polyimide microspheres to 4M KOH solution at 40°C, ultrasonically disperse for 5 minutes, and hydrolyze the solution for 30 minutes under stirring conditions, and the imide bonds on the surface of the polyimide are broken to form amide groups and potassium carboxylate. Filter through a membrane filter and rinse with plenty of deionized water.

[0032] B: Under stirring conditions, the microspheres were immersed in 0.1M silver nitrate aqueous solution for 30 minutes, and the potassium ions and silver ions on the surface of the microspheres had an ion exchange reaction. Filter through a membrane filter and rinse with plenty of deionized water.

[0033] C: Add the microspheres into 0.01M dimethylamine borane (DMAB) solution, stir for 10 minutes, and undergo a chemical reduction reaction with silver ions. The silver ions are reduced to metallic silver, and the core is polyimide, and the shell is obtained. Polyimide-silver (PIAg) composite microspheres of metallic s...

Embodiment 2

[0035] A: Add polyimide microspheres to 4M NaOH solution at 50°C, ultrasonically disperse for 5 minutes, and hydrolyze the solution for 20 minutes under stirring. The imide bond on the surface of polyimide is broken to form amide groups and carboxyl Sodium acid. Centrifuge, wash with deionized water, and repeat the operation 3-4 times.

[0036] B: Under stirring conditions, the microspheres were immersed in 0.1M copper nitrate aqueous solution for 30 minutes, and the potassium ions and copper ions on the surface of the microspheres had an ion exchange reaction. Centrifuge, wash with deionized water, and repeat the operation 3-4 times.

[0037] C: Add the microspheres into 0.02M dimethylamine borane solution, stir at 50°C for 20 minutes, and undergo a chemical reduction reaction with copper ions. The copper ions are reduced to metallic copper, and the core can be obtained as polyimide. The shell is the polyimide copper (PICu) composite microsphere of metal copper. The micros...

Embodiment 3

[0040] A: Add polyimide microspheres to 4M KOH solution at 30°C, ultrasonically disperse for 5 minutes, and hydrolyze the solution for 60 minutes under stirring. The imide bond on the surface of polyimide is broken to form amide groups and carboxyl Potassium acid. Filter through a membrane filter and rinse with plenty of deionized water.

[0041] B: Under stirring conditions, the microspheres were immersed in 0.2M copper nitrate aqueous solution for 20 minutes, and the potassium ions and copper ions on the surface of the microspheres had an ion exchange reaction. Filter through a membrane filter and rinse with plenty of deionized water.

[0042] C: The temperature of the microspheres is raised to 400°C through programmed temperature control, and the temperature is kept for 3 hours. During the heat treatment, the copper ions react with the oxygen in the air to form copper oxide, and the core is polyimide, and the shell is copper oxide. Polyimide copper oxide (PICuO) composite m...

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Abstract

A preparation method for core-shell type polyimide@metal / metal oxide / metal sulfide composite microballoons, and belongs to the field of microballoon surface metallization. The preparation method comprises: immersing a polyimide microballoon into a strong alkali solution, so as to enable the imide bond at the microballoon surface to be hydrolyzed to form an amido group and a carboxylate; then immersing in a solution of a soluble metal salt, so as to obtain a metal salt compound of polyamide acid through in-situ ion exchange; immersing the polyimide microballoon containing the metal ion at the surface into a reducing agent solution, so as to obtain a core-shell type polyimide@metal composite microballoon; or performing heat treatment on the polyimide microballoon containing the metal ion at the surface in air, so as to obtain a core-shell type polyimide@metal oxide composite microballoon; or immersing the polyimide microballoon containing the metal ion at the surface into a solution of a soluble sulfide, so as to obtain a core-shell type polyimide@metal sulfide composite microballoon. The preparation method is simple in execution process, easy to processize and good in industrialization prospect.

Description

technical field [0001] The invention belongs to the field of microsphere surface metallization, and in particular relates to a preparation method of core-shell polyimide metal / metal oxide / metal sulfide composite microspheres. Background technique [0002] Among many composite materials, the core and shell in the core-shell composite microsphere material can be composed of various materials with different properties, so we can control the properties of the core / shell material by changing the composition, size and structure. Tuning to achieve a wide range of tailoring of its optical, thermal, electrical, magnetic and catalytic properties. [0003] As we all know, inorganic materials have high strength, high rigidity, high hardness, and relatively stable performance and function, while organic materials have the advantages of plasticity, toughness, and low density. They each have their own advantages and disadvantages and their own characteristics. The existing applications of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02
CPCB01J13/02
Inventor 吴战鹏刘小玉徐志骁武德珍刘伟
Owner BEIJING UNIV OF CHEM TECH
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