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Method for preparing fully organic high-dielectric copolymers with side chains containing polyaniline chain segments

A polyaniline chain, high dielectric technology, used in organic insulators, plastic/resin/wax insulators, etc., to achieve the effects of simple process, strong controllability, high scientific value and practical value

Inactive Publication Date: 2011-09-28
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] We use the synthesis method of free radical polymerization to solve the problem of phase separation between the filler and the polymer matrix caused by the simple physical blending method, thereby improving the dielectric constant of the material

Method used

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  • Method for preparing fully organic high-dielectric copolymers with side chains containing polyaniline chain segments
  • Method for preparing fully organic high-dielectric copolymers with side chains containing polyaniline chain segments
  • Method for preparing fully organic high-dielectric copolymers with side chains containing polyaniline chain segments

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 0.08 mol of sodium styrene sulfonate and 6.68 mL of aqueous hydrochloric acid solution with a mass fraction of 37% into 160 mL of deionized water, stir for 1 hour, then add 0.08 mol of aniline, and dropwise add 0.08 mol of The 160mL aqueous solution of ammonium persulfate was continued to react for about 4 hours after the completion of the dropwise addition. After the reaction was completed, it was directly suction-filtered, and the filter cake was washed with water until the aqueous solution was neutral, then washed 3 times with acetone until the acetone was colorless, and vacuumed (vacuum degree: 0.1) Drying at 45° C. for 24 hours to obtain dry polyaniline doped with styrenesulfonic acid.

[0027] Preparation of Copolymer Materials with High Dielectric Constant

Embodiment 2

[0029] The polyaniline doped with styrenesulfonic acid and styrene according to the total mass fraction of polyaniline doped with styrenesulfonic acid are 0, 5%, 7%, 10%, 15%, 20%, 25%, 30% %, 35%, and 38% to carry out the polymerization reaction to obtain a series of all-organic high-dielectric copolymers whose side chains contain polyaniline segments.

[0030] Taking as an example when the mass fraction of polyaniline doped with styrene sulfonic acid is 20%, the obtained copolymer is defined as copolymer-20, and so on. The polymerization reaction is: 2.083g of polyaniline doped with styrenesulfonic acid and 0.5208g of styrene monomer are added to a 50mL three-neck flask, then 2mL of toluene solvent is added, and 0.0492g of azobisisobutylene is added after ultrasonication for 30min. Nitrile, deoxygenated with argon for 30 minutes, reacted in an oil bath at 85°C for about 6 hours, and removed the solvent to obtain an all-organic high-dielectric copolymer with polyaniline segme...

Embodiment 3

[0033] Dissolve the obtained all-organic high-dielectric copolymer containing polyaniline segment in the side chain in tetrahydrofuran to configure a solution with a mass fraction of the copolymer of 10%. After the copolymer is completely dissolved, pour the solution of the copolymer into the On a clean and horizontal conductive glass plate, dry at room temperature for 48 hours, and then dry at 45°C for 12 hours to obtain a copolymer film. The scanning electron microscope photos of the surface of the copolymer film are as follows: image 3 shown.

[0034] Testing of High Dielectric Materials

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Abstract

The invention provides a method for preparing a series of fully organic high-dielectric copolymer materials with side chains containing polyaniline chain segments, which is simple and has strong operability. A method for radical polymerization is used to solve the problem of separation existing between fillers and polymer substances and caused by a simple physical blending method, thereby improving the dielectric constants of the materials. Toluene is used as a reactive solvent, polyaniline mixed with phenylethylene and phenylethylene sulfoacid is used as a monomer for radical polymerization reaction, and then a series of copolymers containing different polyaniline mass fractions can be prepared through regulating the mass ratio of the polymerized monomer, thereby obtaining a series of copolymers with different dielectric constants. The obtained copolymers are configured into tetrahydrofuran solutions with the mass fractions of 10%-15%, and then copolymer films can be prepared by using a casting film-formation method. The copolymers obtained by the method have high dielectric constants and small density and is beneficial to the development of high-dielectric materials to small-size light materials.

Description

technical field [0001] The invention belongs to the technical field of high dielectric materials, and in particular relates to an all-organic high dielectric copolymer material whose side chain contains polyaniline segments and a preparation method thereof. Background technique [0002] High dielectric material is a kind of insulating material with broad application prospects. Because of its good performance of storing electric energy and uniform electric field, it has very important applications in electronics, motors and cable industries. With the rapid development of electronics, information and power industries, there is an urgent need for capacitor devices to develop in the direction of high energy storage, miniaturization and low energy consumption. For capacitors, in order to obtain capacitors with small size, light weight and high energy storage density, dielectric materials with low density and high dielectric constant must be used as capacitor dielectrics. Therefo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F290/14C08F212/08C08F212/14C08G73/02H01B3/44
Inventor 王策崔丽莉卢晓峰刘洪涛晁单明茆卉
Owner JILIN UNIV
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