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Preparation method of nickel-zinc ferrite/polyaniline composite material

A technology of nickel-zinc ferrite and composite materials, applied in the field of electromagnetic wave absorbing materials, can solve the problems of the influence of wave absorbing performance, less PANI composite materials, etc., and achieve the effects of enhancing wave absorbing performance, low preparation cost, and improved stability

Inactive Publication Date: 2014-06-11
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there are many reports on conductive polymer / ferrite composite materials in the literature, but the Ni 0.6 Zn 0.4 Fe 2 o 4 There are few reports on the application of PANI composite materials in the field of microwave absorption
Doped polyaniline has electrical loss, and when combined with magnetic materials, it will affect the overall absorbing performance

Method used

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  • Preparation method of nickel-zinc ferrite/polyaniline composite material
  • Preparation method of nickel-zinc ferrite/polyaniline composite material
  • Preparation method of nickel-zinc ferrite/polyaniline composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The molar ratio of aniline monomer to nickel zinc ferrite n(Ani):n(Ni 0.6 Zn 0.4 Fe 2 o 4 )=1:1 Ni 0.6 Zn 0.4 Fe 2 o 4 / PANI composite preparation:

[0043] (1), according to Ni 0.6 Zn 0.4 Fe 2 o 4 The stoichiometric ratio of Ni 2+ :Zn 2+ :Fe 3+ =3:2:10 Weigh nickel nitrate, zinc nitrate, ferric nitrate respectively, add distilled water, mix and dissolve completely under the condition of magnetic stirring, then press n(Fe 3+ ): n(CTAB)=2:1 Add surfactant cetyltrimethylammonium bromide (CTAB), and mix evenly under magnetic stirring; then slowly add the configured 3mol / L NaOH solution dropwise to In the above mixed solution, adjust the pH=9, react in a water bath at 60°C for 2 hours, and the solution is colloidal; wherein, adjust the pH to 10 or 11, react in a water bath at 80°C or 100°C for 4 hours or 6 hours, and obtain There was no significant difference in the experimental results.

[0044] (2) The solution was left to cool, and the supernatant was rem...

Embodiment 2

[0048] The molar ratio of aniline monomer to nickel zinc ferrite n(Ani):n(Ni 0.6 Zn 0.4 Fe 2 o 4 )=1:2 Ni 0.6 Zn 0.4 Fe 2 o 4 / PANI composite preparation:

[0049] (1), with (1) of embodiment 1

[0050] (2), (2) with embodiment 1

[0051] (3), with (3) of embodiment 1

[0052] (4) Preparation of Ni by in-situ polymerization 0.6 Zn 0.4 Fe 2 o 4 / PANI: Weigh aniline monomer and citric acid (CA) separately, add distilled water, mix well under mechanical stirring, then add a certain amount of nickel-zinc ferrite and mix under ice bath conditions, after mixing evenly, pour into the mixing Slowly add ammonium persulfate (APS) solution to the solution to initiate the reaction, and react under ice bath conditions, and the reaction time can be 6h-18h; after the reaction is completed, repeatedly wash with distilled water and absolute ethanol, vacuum Dry for 3 hours to obtain a nickel-zinc ferrite / polyaniline composite material; the molar ratio of the aniline monomer to citr...

Embodiment 3

[0054] The molar ratio of aniline monomer to nickel zinc ferrite n(Ani):n(Ni 0.6 Zn 0.4 Fe 2 o 4 )=1:3 Ni 0.6 Zn 0.4 Fe 2 o 4 / PANI composite preparation:

[0055] (1), with (1) of embodiment 1

[0056] (2), (2) with embodiment 1

[0057] (3), with (3) of embodiment 1

[0058] (4) Preparation of Ni by in-situ polymerization 0.6 Zn 0.4 Fe 2 o 4 / PANI: Weigh aniline monomer and citric acid (CA) separately, add distilled water, mix well under mechanical stirring, then add a certain amount of nickel-zinc ferrite and mix under ice bath conditions, after mixing evenly, pour into the mixing Slowly add ammonium persulfate (APS) solution to the solution to initiate the reaction, and react under ice bath conditions, and the reaction time can be 6h-18h; after the reaction is completed, repeatedly wash with distilled water and absolute ethanol, vacuum Dry for 3 hours to obtain a nickel-zinc ferrite / polyaniline composite material; the molar ratio of the aniline monomer to cit...

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Abstract

The invention discloses a preparation method of a nickel-zinc ferrite / polyaniline composite material. The preparation method comprises the following steps: respectively weighing nickel nitrate, zinc nitrate and ferric nitrate in a stoichiometric ratio of 3:2:10 of Ni<2+>:Zn<2+>:Fe<3> in Ni0.6Zn0.4Fe2O4, adding distilled water, and mixing and dissolving under a magnetic stirring condition; dropwise adding a NaOH solution to an obtained mixing solution, regulating pH to 9-11, reacting under a water bath condition until the solution is in a colloidal form; repeatedly centrifuging and washing through distilled water and absolute ethyl alcohol to obtain a brown precipitate; drying the precipitate in an oven at 80-100 DEG C to obtain a ferrite precursor; calcining in a muffle for 2-2.5 hours at 900-1100 DEG C and naturally cooling to obtain the required nickel-zinc ferrite. Processability, stability and electric performance of the material disclosed by the invention are better improved.

Description

technical field [0001] The invention belongs to the field of electromagnetic wave-absorbing materials, and in particular relates to a preparation method of a nickel-zinc ferrite / polyaniline composite material. Background technique [0002] At present, with the rapid development of radar detection technology, the military defense system and aircraft of various countries in the world are more and more likely to be detected, tracked and threatened by the enemy. In order to improve the survivability of military targets and the penetration capability of weapon systems, vigorously developing stealth technology has naturally become one of the important directions of military technology development. [0003] At present, the research on absorbing materials at home and abroad mainly includes: ferrite absorbing materials, nano absorbing materials, metal ultrafine powder, conductive polymer materials, dielectric ceramic absorbing materials, intelligent stealth materials and fiber fine a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02C08K3/22
Inventor 张豹山王敏唐东明杨燚
Owner NANJING UNIV
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