Unlock instant, AI-driven research and patent intelligence for your innovation.

High dielectric polyimide composite material and preparation method thereof

A technology of polyimide and composite material, applied in the field of polyimide nanocomposite film material and its preparation, can solve the problems of limiting the dielectric properties of the three-phase composite film, affecting the electrical conductivity and the like, and achieves overcoming the serious reduction of mechanical properties. , Excellent dielectric properties, the effect of overcoming drastic changes

Inactive Publication Date: 2014-12-17
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
View PDF5 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the dielectric constant of the composite material obtained by doping conductive / inorganic fillers is higher than that of pure polyimide, the graft modification of graphene affects the electrical conductivity of graphene, which limits The improvement of the dielectric properties of this three-phase composite film

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High dielectric polyimide composite material and preparation method thereof
  • High dielectric polyimide composite material and preparation method thereof
  • High dielectric polyimide composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Add 0.0166g of graphene and 10ml of DMAc into a three-neck bottle, seal it, and ultrasonically disperse it for 8h. Add 0.5067g ODA under stirring condition, after it dissolves completely, add ice bath. Stirring was continued, and a total of 1.1367g of 6FDA was added in 6 times every 10 minutes. Continue to react for 20 minutes after the feeding is completed to obtain a polyamic acid / graphene solution;

[0030] 2) Coating the polyamic acid / graphene solution on a glass plate with a uniform thickness film, and imidizing at 135°C and 300°C for 1h and 2h, respectively, to obtain graphene with a volume fraction of 0.63% (mass fraction 1%) Polyimide composite film.

[0031] The obtained polyimide composite film was cut into a 1×1 cm sample piece, and the dielectric property test was carried out after spraying gold on both sides of the sample piece with an ion sputtering instrument. The results showed that the dielectric constant of the film composite material at room temp...

Embodiment 2

[0033] 1) Add 0.0332g of graphene and 10ml of DMAc into a three-necked bottle, seal it, and ultrasonically disperse it for 8h. Add 0.5016g ODA under stirring condition, after it dissolves completely, add ice bath. Stirring was continued, and a total of 1.1252 g of 6FDA was added in 6 times every 10 minutes. Continue to react for 20 minutes after the feeding is completed to obtain a polyamic acid / graphene solution;

[0034] 2) Coating the polyamic acid / graphene solution on a glass plate with a uniform thickness film, and imidizing at 135°C and 300°C for 1h and 2h respectively, to obtain graphene with a volume fraction of 1.26% (mass fraction 2%) Polyimide composite film.

[0035]The obtained polyimide composite film was cut into a 1×1 cm sample piece, and the dielectric property test was carried out after spraying gold on both sides of the sample piece with an ion sputtering instrument. The results showed that the dielectric constant of the film composite material at room tem...

Embodiment 3

[0037] 1) Add 0.0382g of graphene and 10ml of DMAc into a three-necked bottle, seal it, and ultrasonically disperse it for 8h. Add 0.5000g ODA under stirring condition, after it dissolves completely, add ice bath. Stirring was continued, and a total of 1.1218 g of 6FDA was added in 6 times every 10 minutes. Continue to react for 20 minutes after the feeding is completed to obtain a polyamic acid / graphene solution;

[0038] 2) Coating the polyamic acid / graphene solution on a glass plate with a uniform thickness film, and imidizing at 135°C and 300°C for 1h and 2h respectively, to obtain graphene with a volume fraction of 1.45% (mass fraction 2.3%) Polyimide composite film.

[0039] The obtained polyimide composite film was cut into a 1×1 cm sample piece, and the dielectric property test was carried out after spraying gold on both sides of the sample piece with an ion sputtering instrument. The results showed that the dielectric constant of the film composite material at room ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a polyimide nano composite material with a high dielectric constant and a preparation method thereof, and belongs to the field of organic / inorganic hybrid materials. The polyimide nano composite film material disclosed by the invention takes polyimide which is obtained by an anhydride monomer and a diamine monomer in a manner of polycondensation as the matrix and is doped with graphene and nano barium titanate, wherein the volume fraction of the graphene in the material is 0-3%; the volume fraction of nano barium titanate in the material is 0-20%; and the molar ratio of the anhydride monomer to the diamine monomer is (1.1 to 1) to 1. The polyimide nano composite material disclosed by the invention has a high dielectric constant and low loss, and can still keep good mechanical property, thereby overcoming the problems that an existing dual-phase high dielectric material is poor in tenacity, and difficult in control on packing amount and the like. The polyimide nano composite film material disclosed by the invention is suitable for components in microelectronic fields such as high-performance embedded capacitors, printed circuit boards and the like.

Description

technical field [0001] The invention belongs to the field of organic / inorganic hybrid materials, in particular to a polyimide nanocomposite film material with high dielectric constant and low loss and a preparation method thereof. Background technique [0002] With the development of the field of electronic science, the research of electronic devices tends to be miniaturized and highly efficient so as to realize the application in high-power capacitors and embedded capacitors. At the same time, the requirements for high dielectric constant film materials required in some sensors and high-frequency telecommunications equipment are gradually increasing. At present, the high dielectric constant film materials commonly used in electronic devices such as capacitors are mostly inorganic ceramic materials or polymer / inorganic composite film materials. Among them, although the inorganic ceramic material has a high dielectric constant, its processing temperature is as high as 700 ° ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08K3/04C08G73/10C08J5/18C08L79/08C08K3/24
Inventor 田国峰刘京妮齐胜利牛鸿庆韩恩林武德珍
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH