Nano core-shell particle/polyimide composite film and its preparation method and application

A nano-core-shell and composite film technology, applied in transportation and packaging, metal processing equipment, fixed capacitor dielectrics, etc., can solve problems such as large dielectric loss, achieve improved compatibility, uniform dispersion, and ensure a large number of aggregation effects

Inactive Publication Date: 2016-09-14
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conductive particles such as Al and Ag mainly produce electronic displacement polarization, and the consumption is mainly conductance loss.
When the content of conductive particles is too large and reaches or exceeds the percolation threshold, a conductive path will be formed, resulting in a large dielectric loss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method of nano core-shell particle / polyimide composite film,

[0027] In the first step, multi-morphology nano-Ag is prepared by ethylene glycol reduction method;

[0028] In the second step, using Al 2 (SO 4 ) 3 and Na 2 SiO 3 The precipitation reaction coats a layer of Al on the surface of nano-Ag 2 (SiO 3 ) 3 , to prepare aluminum silicate-coated silver nano-core-shell particles (Ag / Al 2 (SiO 3 ) 3 );

[0029] The third step is to use 4,4'-diaminodiphenyl ether (ODA) and pyromellitic dianhydride (PMDA) as raw material monomers, in Ag / Al 2 (SiO 3 ) 3 Polymerization in solution to generate aluminum silicate-coated silver nano-core-shell particles / polyamic acid (Ag / Al 2 (SiO 3 ) 3 / PAA) solution;

[0030] In the fourth step, the Ag / Al 2 (SiO 3 ) 3 / PAA solution coating and thermal imidization treatment to obtain Ag / Al 2 (SiO 3 ) 3 / PI composite film.

Embodiment 2

[0032] The preparation method of nano-core-shell particles / polyimide composite film described in Example 1, the preparation of multi-morphology nano-Ag by the ethylene glycol reduction method described in the first step is to add 0.3334g polyvinylpyrrolidone (PVP) to 250mL In the three-necked bottle, add 20mL concentration of 0.3×10 -3 mol / L NaOH solution, ultrasonically disperse for 10min, heat the solution to 150°C, stir and reflux for 1 hour, and dissolve 20mL of AgNO with a concentration of 0.1mol / L 3 Ethylene glycol solution was added to the mixed solution at a rate of 0.1 mL / min. After the dropwise addition, stirring was continued at 150°C for 60 min. The solution system was cooled to room temperature for centrifugation, and nano-Ag was obtained after repeated washing with acetone.

Embodiment 3

[0034] The preparation method of the nano-core-shell particle / polyimide composite film described in embodiment 1 or 2, the aluminum silicate described in the second step coats the silver nano-core-shell particle (Ag / Al 2 (SiO 3 ) 3 ) was prepared by dissolving 0.1215g of nano-Ag described in the first step in deionized water, ultrasonically dispersing and heating to 75°C, and pre-prepared 10mL with a concentration of 2.25×10 -3 mol / L Al 2 (SO 4 ) 3 Aqueous solution with 10mL concentration is 6.75×10 -3 mol / L Na 2 SiO 3 The aqueous solution was dripped into the nano-Ag aqueous solution (Al 2 (SiO 3 ) 3 The ratio of the amount of the substance to the amount of nano-Ag is 0.02:1.00), after the dropwise addition, continue to ultrasonically treat at 75°C for 30min, cool the system to room temperature and centrifuge to obtain aluminum silicate-coated silver nano-core-shell particles (Ag / al 2 (SiO 3 ) 3 ).

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Abstract

Nano core-shell particle/polyimide composite film, its preparation method and application. The existing dielectric polymer materials used to prepare capacitors with high energy storage density have a low dielectric constant (ε<3), which is difficult to meet market demand. The method of the present invention comprises: adopting the ethylene glycol reduction method to prepare multi-morphology nano-Ag; utilizing the precipitation reaction of Al2(SO4)3 and Na2SiO3 to coat a layer of Al2(SiO3)3 on the surface of the nano-Ag to prepare aluminum silicate-coated silver Nano-core-shell particles (Ag/Al2(SiO3)3); with 4,4'-diaminodiphenyl ether (ODA) and pyromellitic dianhydride (PMDA) as raw material monomers, in Ag/Al2(SiO3) 3. Polymerize in solution to form aluminum silicate-coated silver nano core-shell particles/polyamic acid (Ag/Al2(SiO3)3/PAA) solution; film Ag/Al2(SiO3)3/PAA solution and conduct thermal imide The Ag/Al2(SiO3)3/PI composite film was obtained by chemical treatment. The invention is used to prepare embedded capacitors.

Description

Technical field: [0001] The invention relates to a nano core-shell particle / polyimide composite film and a preparation method and application thereof. Background technique: [0002] The integration of electronic circuits has put forward higher requirements for capacitors, making them develop in the direction of miniaturization, high capacity, low cost, and multi-function. The performance of a capacitor mainly depends on the dielectric material between the two electrodes. To obtain capacitors with high energy storage density, it is necessary to study high energy storage density dielectric materials and increase their dielectric constant to produce capacitors with small volume and high energy storage density. Polymer materials have become popular dielectric materials for energy storage devices due to their high energy storage density, high breakdown field strength, low dielectric loss, and excellent thermal stability. However, most of the dielectric polymer materials used to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08G73/10C08K9/10C08K3/08C08J5/18B22F1/02H01G4/18
CPCH01G4/06C08G73/1007C08G73/1071C08J5/18C08K3/08C08K9/10C08J2379/08C08L2203/20C08K2201/011C08K2201/001C08K2003/0806B22F2302/25B22F2302/35B22F2302/45B22F2301/052B22F2301/255B22F1/054B22F1/16C08L79/08
Inventor 翁凌闫利文刘立柱李红霞
Owner HARBIN UNIV OF SCI & TECH
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