Preparation method of high-dielectric polyimide/calcium copper titanate nanowire composite material

A technology of copper calcium titanate and polyimide, which is applied in the field of preparation of high dielectric polyimide/copper calcium titanate (CCTO) nanowire composite materials, can solve the difficulty of intercalation of macromolecules and reduce percolation Threshold, high aspect ratio, etc., to achieve the effect of reducing the percolation threshold, saving manpower, and improving dielectric properties

Inactive Publication Date: 2013-11-20
武汉一海数字医疗科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aspect ratio of CCTO nanowires is high, which can effectively reduce the percolation threshold, solve the problems of poor compatibility and difficult intercalation of macromolecules when polymers and large-size particles (macro or micro)

Method used

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  • Preparation method of high-dielectric polyimide/calcium copper titanate nanowire composite material
  • Preparation method of high-dielectric polyimide/calcium copper titanate nanowire composite material
  • Preparation method of high-dielectric polyimide/calcium copper titanate nanowire composite material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040] Example 1

[0041] a) Press figure 1 In the procedure in the above procedure, weigh 2.554 g of diaminodiphenyl ether (ODA) into a three-necked flask containing 7.4 ml of N,N-dimethylacetamide (DMAC) solution.

[0042] b) Weigh 0.048 g of CCTO nanowire powder (mass fraction of 1%) and add it to the above-mentioned mixed solution, and perform magnetic stirring while adding it.

[0043] c) Put the solution obtained in b) into an ultrasonic disperser for 2 hours to mix the solution uniformly.

[0044] d) Weigh 2.835 grams of pyromellitic dianhydride (PMDA) into the mixed solution, stir magnetically while adding, and then react for 4 hours at room temperature in an environment protected by nitrogen to obtain polyimide / The original solution of CCTO nanowire composite material.

[0045] e) Pour the stock solution of the composite material on the glass substrate, spread it out and flatten it, put it in a muffle furnace, anneal gradiently in a vacuum environment, and keep it at 60℃, 1...

Example Embodiment

[0050] Example 2

[0051] a) Press figure 1 In the procedure in the above procedure, weigh 2.554 g of diaminodiphenyl ether (ODA) into a three-necked flask containing 74 ml of N,N-dimethylacetamide in (DMAC) solution.

[0052] b) Weigh 0.154 g of the prepared CCTO nanowire powder (mass fraction of 3%) and add it to the above-mentioned mixed solution, and perform magnetic stirring while adding it.

[0053] c) Put the solution obtained in b) into an ultrasonic disperser for 2 hours to mix the solution uniformly.

[0054] d) Weigh 2.835 grams of pyromellitic dianhydride (PMDA) into the mixed solution, stir magnetically while adding, and then react for 12 hours at room temperature in an environment protected by nitrogen to obtain polyimide / The original solution of CCTO nanowire composite material.

[0055] e) Pour the stock solution of the composite material on the glass substrate, spread it out and flatten it, put it in a muffle furnace, anneal gradiently in a vacuum environment, and k...

Example Embodiment

[0060] Example 3

[0061] a) Press figure 1 In the procedure in the above procedure, weigh 2.554 g of diaminodiphenyl ether (ODA) into a three-necked flask containing 74 ml of N,N-dimethylacetamide in (DMAC) solution.

[0062] b) Weigh 0.499 g of the prepared CCTO nanowire powder (mass fraction of 8%) and add it to the above-mentioned mixed solution, and perform magnetic stirring while adding it.

[0063] c) Put the solution obtained in b) into an ultrasonic disperser for 2 hours to mix the solution uniformly.

[0064] d) Weigh 2.835 grams of pyromellitic dianhydride (PMDA) into the mixed solution, stir magnetically while adding, and then react for 8 hours at room temperature in an environment protected by nitrogen to obtain polyimide / The original solution of CCTO nanowire composite material.

[0065] e) Pour the stock solution of the composite material on the glass substrate, spread it out and flatten it, put it in a muffle furnace, anneal gradiently in a vacuum environment, and k...

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Abstract

The invention discloses a preparation method of a high-dielectric polyimide/calcium copper titanate nanowire composite material. The composite material is prepared by using polymer as a substrate. The method comprises the following steps: carrying out ultrasonic dispersion on calcium copper titanate nanowires in anhydrous ethanol, blending with a polyimide monomer in a solvent, and carrying out in-situ polymerization reaction on the monomer at room temperature while implementing copolymerization of polyimide and intercalation compounding with calcium copper titanate nanowires; and carrying out gradient annealing on the stock solution by a coating process to obtain the polyimide/CCTO nanowire composite film. Compared with pure polyimide, the dielectric constant of the polyimide/calcium copper titanate nanowire composite material is enhanced by 25 times, the dielectric loss is lower (0.015), and thus, the polyimide/calcium copper titanate nanowire composite material has wide application prospects in the fields of high energy storage capacitors, artificial organs, high speed integrated circuits and the like.

Description

[0001] technical field [0002] The invention relates to a preparation method of a high-dielectric polyimide / copper calcium titanate (CCTO) nanowire composite material, which belongs to the field of electronic materials. Background technique [0003] Polymers are widely used in capacitors, integrated circuits, and high-voltage insulation due to their excellent electrical, thermal, and ductile properties, but their low dielectric constant limits their further development. With the continuous development of device integration and miniaturization in today's electronic field, it is necessary to provide new materials with both high dielectric constant and low dielectric loss to meet the requirements. [0004] In order to obtain the required high-performance materials, the commonly used method is to modify polymer materials by doping. There are two commonly used doping methods. One is to prepare a polymer / ferroelectric ceramic composite material by combining ferroelectric ceramic...

Claims

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Application Information

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IPC IPC(8): C08G73/10C08K7/08C08K3/24C08J5/18C08L79/08
Inventor 杨阳熊锐刘雍石兢石彬牛牧林晶
Owner 武汉一海数字医疗科技股份有限公司
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