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Polyaniline/halloysite/barium ferrite electromagnetic composite material and preparation method thereof

An electromagnetic composite material, barium ferrite technology, applied in the field of electromagnetic composite materials, can solve the problems of difficult large-scale industrial production, weak absorbing performance, narrow absorption frequency band, etc., to improve preparation efficiency and reaction yield, Improve the absorbing performance and improve the absorbing effect

Pending Publication Date: 2020-12-29
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For example, Chinese patent ZL201110072373.6 and Chinese patent ZL201310136032.X respectively prepare polyaniline and polypyrrole composite wave-absorbing products, which have the disadvantages of weak wave-absorbing performance and narrow absorption frequency band
Chinese patent CN201911415779.2 introduces a halloysite-cerium-doped manganese-zinc ferrite composite absorbing material, but due to the high cost of manganese-zinc ferrite raw materials, its application is limited, and it is difficult to achieve large-scale industrial production
At present, there are no literature and patent reports on the composite of conductive polyaniline, halloysite, and barium ferrite as a wave-absorbing material.

Method used

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  • Polyaniline/halloysite/barium ferrite electromagnetic composite material and preparation method thereof
  • Polyaniline/halloysite/barium ferrite electromagnetic composite material and preparation method thereof

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Effect test

Embodiment 1

[0032] The polyaniline / halloysite / lanthanum-cerium co-doped barium ferrite electromagnetic composite material and its preparation method in this embodiment include the following steps:

[0033] Add halloysite powder into 200mL of hydrochloric acid solution with a concentration of 0.25mol / L, stir at room temperature for 8h, and filter with suction; wash with ethanol through centrifugation repeatedly to remove organic matters; vacuum-dry at 60°C, and grind into powder; Save with mesh sieve. The purified halloysite is obtained.

[0034]According to the total mass of halloysite, lanthanum-cerium co-doped barium ferrite is 20wt% of the mass of aniline monomer, the mass of halloysite is the total mass of halloysite, lanthanum-cerium co-doped barium ferrite 0 wt% (5 wt%, 10 wt%, 15wt%, 20wt%, 25wt%), 0.0011mol sodium dodecylbenzenesulfonate was dissolved in 20ml of 1mol / L hydrochloric acid solution for ultrasonic dispersion for 30min, and Add 1ml of aniline monomer and stir for 30m...

Embodiment 2

[0036] The polyaniline / halloysite / lanthanum-cerium co-doped barium ferrite electromagnetic composite material and its preparation method in this embodiment include the following steps:

[0037] Add halloysite powder into 200mL of hydrochloric acid solution with a concentration of 0.25mol / L, stir at room temperature for 8h, and filter with suction; wash with ethanol through centrifugation repeatedly to remove organic matters; vacuum-dry at 60°C, and grind into powder; Save with mesh sieve. The purified halloysite is obtained.

[0038] According to the total mass of halloysite and lanthanum-cerium co-doped barium ferrite is 10 wt% (20 wt%, 30 wt%, 40 wt%, 50 wt%) of the mass of aniline monomer, the mass of halloysite is Angstrom 10wt% of the total mass of rockite and lanthanum-cerium co-doped barium ferrite, 0.0011mol sodium dodecylbenzenesulfonate was dissolved in 20ml of 1.5mol / L hydrochloric acid solution for ultrasonic dispersion for 30min, and 1ml Aniline monomer, stirred...

Embodiment 3

[0040] The polyaniline / halloysite / lanthanum-cerium co-doped barium ferrite electromagnetic composite material and its preparation method in this embodiment include the following steps:

[0041] Add halloysite powder into 200mL of hydrochloric acid solution with a concentration of 0.25mol / L, stir at room temperature for 10h, and filter with suction; wash with ethanol through centrifugation repeatedly to remove organic matter; vacuum-dry at 60°C and grind into powder; pass through 200 Save with mesh sieve. The purified halloysite is obtained.

[0042] According to the total mass of halloysite, lanthanum-cerium co-doped barium ferrite is 40wt% of the mass of aniline monomer, halloysite mass is the total mass of halloysite, lanthanum-cerium co-doped barium ferrite 10wt%, 0.0011mol sodium dodecylbenzenesulfonate was dissolved in 20ml 1mol / L hydrochloric acid solution and ultrasonically dispersed for 30min, then 1ml aniline monomer was added thereto and stirred for 30min; then diss...

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Abstract

The invention relates to a polyaniline / halloysite / barium ferrite electromagnetic composite material and a preparation method thereof. Purified halloysite is used as a carrier, barium ferrite nanoparticles are loaded on the surface of the halloysite, and polyaniline is used as a coating layer. Through two steps of halloysite purification treatment and preparation of an electromagnetic composite material coated with a polyaniline layer and taking halloysite as a matrix, the polyaniline / halloysite / barium ferrite nano electromagnetic composite material is prepared by adopting a one-step in-situ polymerization method. The organic conductive polymer polyaniline, barium ferrite and halloysite are organically compounded, the advantages of the three components can be maintained, the composite material has dielectric loss and magnetic loss, the halloysite is introduced as the carrier, and the prepared nano composite material with the core-shell structure has an interface effect and a quantum effect. The microwave absorbing performance of the material is greatly improved, the absorbing frequency band of the microwave material is widened, the absorbing efficiency is improved, and the defects that a single wave absorbing product is poor in wave absorbing performance and narrow in absorbing frequency are overcome.

Description

technical field [0001] The invention relates to an electromagnetic composite material, in particular to a polyaniline / halloysite / barium ferrite electromagnetic composite material and a preparation method thereof. Background technique [0002] With the development of science and technology, electronic and communication equipment has been widely used and developed, and electromagnetic radiation has become a new source of pollution. Electromagnetic radiation will not only pose a serious threat to human health, but also have a certain impact on the normal operation of precision electronic equipment. Therefore, it is of great practical significance to research and develop a new type of absorbing material that can effectively reduce the reflection of electromagnetic waves. In recent years, the development of high-performance microwave absorbing materials with "thin sheet, strong absorption, low density, and wide frequency band" has attracted widespread attention. [0003] Barium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02C08K9/02C08K3/34C08K3/22
CPCC08G73/0266C08K9/02C08K3/346C08K3/22
Inventor 张靓冯辉霞潘魁尚琼陈娜丽谭琳赵丹练青刘亚飞
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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