One-dimensional dual-core-shell structure nickel oxide@lanthanum nickelate@polypyrrole absorbing material and preparation method thereof

A technology of wave absorbing material and core-shell structure, applied in shielding materials, chemical characteristics of fibers, fiber processing, etc., can solve the problems of high density and narrow absorption frequency band, and achieve uniform size distribution, wide wave absorption frequency band, and excellent wave absorption. performance effect

Active Publication Date: 2020-04-24
HENAN INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Ferrite, metal micropowder, barium titanate, silicon carbide, graphite, oxide semiconductor materials, polymer conductive polymers, etc. are all traditional wave-absorbing materials, and they usually have the disadvantages of narrow absorption frequency band and high density.

Method used

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  • One-dimensional dual-core-shell structure nickel oxide@lanthanum nickelate@polypyrrole absorbing material and preparation method thereof
  • One-dimensional dual-core-shell structure nickel oxide@lanthanum nickelate@polypyrrole absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of nickel oxide@lanthanum nickelate@polypyrrole absorbing material with one-dimensional double core-shell structure, the steps are as follows:

[0027] (1) Nickel oxide@lanthanum nickelate nanofibers were prepared by electrospinning, with Ni(NO 3 ) 2 As raw material, Ni(NO 3 ) 2 dissolved in deionized water, where Ni(NO 3 ) 2 The mass ratio to deionized water is 1:5, and the core layer spinning solution is prepared by adding polymer polyvinylpyrrolidone (PVP), and the mass ratio of polymer PVP to deionized water is 1:2; the NiCO 3 , La(NO 3 ) 3 Dissolved in 5% dilute nitric acid, where NiCO 3 and La(NO 3 ) 3 The mass ratio of the total mass of the polymer to dilute nitric acid is 1:15, while adding high polymer polyvinylpyrrolidone (PVP) to prepare the shell spinning solution, the mass ratio of high polymer PVP to dilute nitric acid is 1:5; The shell spinning solution and the core spinning solution are added to the spinning machine for s...

Embodiment 2

[0033] The preparation method of nickel oxide@lanthanum nickelate@polypyrrole absorbing material with one-dimensional double core-shell structure, the steps are as follows:

[0034](1) Nickel oxide@lanthanum nickelate nanofibers were prepared by electrospinning, with Ni(NO 3 ) 2 As raw material, Ni(NO 3 ) 2 dissolved in deionized water, where Ni(NO 3 ) 2 The mass ratio to deionized water is 1: 10, and the core layer spinning solution is prepared by adding polymer polyvinylpyrrolidone (PVP), and the mass ratio of polymer PVP to deionized water is 1: 4; the NiCO 3 , La(NO 3 ) 3 Dissolved in 8 % dilute nitric acid, where NiCO 3 , La(NO 3 ) 3 The mass ratio of high polymer PVP to dilute nitric acid is 1:18, and at the same time, high polymer polyvinylpyrrolidone (PVP) is added to prepare the shell spinning solution. The mass ratio of high polymer PVP to dilute nitric acid is 1:8; the shell spinning The silk solution and the core layer spinning solution were added to the ...

Embodiment 3

[0039] The preparation method of nickel oxide@lanthanum nickelate@polypyrrole absorbing material with one-dimensional double core-shell structure, the steps are as follows:

[0040] (1) Nickel oxide@lanthanum nickelate nanofibers were prepared by electrospinning, with Ni(NO 3 ) 2 As raw material, Ni(NO 3 ) 2 dissolved in deionized water, where Ni(NO 3 ) 2 The mass ratio to deionized water is 1:7, and the core layer spinning solution is prepared by adding high polymer polyvinylpyrrolidone (PVP), and the mass ratio of high polymer PVP to deionized water is 1:3; the NiCO 3 , La(NO 3 ) 3 Dissolved in 7% dilute nitric acid, where NiCO 3 , La(NO 3 ) 3 The mass ratio of high polymer PVP to dilute nitric acid is 1:17, and at the same time, high polymer polyvinylpyrrolidone (PVP) is added to prepare the shell spinning solution. The mass ratio of high polymer PVP to dilute nitric acid is 1:6; the shell spinning The silk liquid and the core layer spinning liquid were added to t...

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Abstract

The invention provides a nickel oxide@lanthanum nickelate@polypyrrole wave-absorbing material in a one-dimensional double-core / shell structure and a preparation method thereof, wherein the material isprepared through electrostatic spinning with combination of liquid phase synthesis. The product has an excellent one-core / two-shell one-dimensional appearance, wherein the shell layer is composed oflanthanum nickelate and polypyrrole while the core layer is nickel oxide. The shell layer is 10-100 nm in thickness, which is controllable. The material has excellent wave-absorbing performance and wide wave-absorbing frequency band. The preparation method of the material is simple, is low in cost, is convenient and quick, and allows large scale production.

Description

technical field [0001] The invention relates to the field of preparation of functional materials, in particular to a nickel oxide@lanthanum nickelate@polypyrrole wave-absorbing material with a one-dimensional double-core-shell structure and a preparation method thereof. Background technique [0002] Electromagnetic wave absorbing materials are widely used in military and civilian fields, and have become a research hotspot in the fields of national defense equipment and civilian anti-electromagnetic radiation. Absorbing material refers to a class of materials that can absorb electromagnetic wave energy projected onto its surface, and convert the electromagnetic wave energy into heat energy or other forms of energy through the dielectric loss of the material and dissipate it. Its working principle is related to the electromagnetic properties of materials. A good absorbing material must meet two conditions, one is that the radar wave is injected into the absorbing material, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/06D01F8/18D01F9/08D01D5/34D01D5/00H05K9/00
CPCC08G73/0611D01D5/003D01D5/34D01F8/18D01F9/08H05K9/009
Inventor 刘少辉王娇郝好山赵利敏
Owner HENAN INST OF ENG
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