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Composite superfine fiber wave-absorbing material and preparation method thereof

A wave-absorbing material and ultra-fine fiber technology, which is applied in fiber treatment, chemical instruments and methods, and other chemical processes, can solve problems that are not involved in the preparation method of polyaniline composite ultra-fine fiber wave-absorbing materials, and achieve good mechanical properties , cost saving, easy preparation process

Inactive Publication Date: 2011-05-18
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But above-mentioned research all does not relate to the nano-inorganic particle ferric oxide (Fe) that the present invention proposes 3 o 4 ) / polyaniline composite superfine fiber absorbing material preparation method

Method used

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  • Composite superfine fiber wave-absorbing material and preparation method thereof
  • Composite superfine fiber wave-absorbing material and preparation method thereof
  • Composite superfine fiber wave-absorbing material and preparation method thereof

Examples

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example 1

[0017] 0.3mol / l FeSO 4 ·7H 2 O aqueous solution and 0.4mol / L FeCl 3 The aqueous solution is mixed at a volume ratio of 2:1, placed in a three-necked flask with nitrogen, and an appropriate amount of polyethylene glycol is added to it, and the temperature is raised to 70°C after ultrasonic oscillation and mixing, and concentrated ammonia water is added dropwise to it after vigorous stirring for several minutes. , after adjusting to PH=9, continue to react for 1h, magnetically separate the supernatant, and Fe 3 o 4 The particles were washed several times with distilled water and dried under vacuum at 40°C for 24h. Weigh a certain amount of CTAB, mix it with n-butanol according to the mass ratio of 1:1 and place it in a three-necked flask, add 40ml of water to dissolve it, and take the above-mentioned appropriate amount of Fe after nitrogen protection. 3 o 4 The particles were added to the solution, and ultrasonically oscillated for 2 hours at room temperature; 2 ml of anili...

example 2

[0019] 2mol / l FeSO 4 ·7H 2 O aqueous solution and 2.2mol / L FeCl 3 The aqueous solution is mixed with a mass ratio of 3:2, placed in a three-necked flask with nitrogen, and an appropriate amount of polyethylene glycol is added to it, and the temperature is raised to 75°C after ultrasonic oscillation and mixing, and concentrated ammonia water is added dropwise to it after vigorous stirring for several minutes. , after adjusting to PH=9, continue to react for 1.2h, magnetically separate the supernatant, and Fe 3 o 4 The particles were washed several times with distilled water and dried under vacuum at 40°C for 24h. Take a certain amount of CTAB, put it in a three-necked flask after mixing it with n-butanol according to the mass ratio of 3:2, add 80ml of water to dissolve it, and take the above-mentioned appropriate amount of Fe after nitrogen protection. 3 o 4 Particles were added to the solution; and ultrasonically oscillated at room temperature for 2 h. After adding 10 g ...

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Abstract

The invention relates to a composite superfine fiber wave-absorbing material and a preparation method thereof, relating to the technical field of preparing Fe3O4 through a sol-gel method, the technical field of preparing Fe3O4 / polyaniline composite nanoparticles through the situ polymerization method, the technical field of preparing the superfine fiber wave-absorbing material through an electrostatic spinning method and other technical fields. In the method in the invention, the principles of the sol-gel method and situ combination are adopted and the situ polymerization chemical reaction of FeSO4.7H2O, FeCl3, ammonium persulfate and other raw materials is utilized to prepare Fe3O4 / polyaniline composite particles with good dispersibility; and then the electrostatic spinning technology is adopted and the drum process is used to receive the obtained superfine fiber wave-absorbing material. In the method in the invention, the defects that the polyaniline is difficult to dissolve, the magnetic loss of the common wave-absorbing material is difficult to control, and the like are overcome. The prepared superfine fiber wave-absorbing material in the invention has high the advantages of strength and machinability, small fiber diameter and uniform distribution and can be widely used in various fields such as electronic screening, military camouflage and civil aviation and the like.

Description

technical field [0001] The invention relates to a preparation method of a composite superfine fiber absorbing material, in particular to a sol-gel method for preparing Fe 3 o 4 , Fe was prepared by in situ polymerization 3 o 4 / polyaniline nanocomposite particles, and the preparation of microfiber wave-absorbing materials by electrospinning. Background technique [0002] Microwave absorbing material refers to a class of materials that can effectively absorb incident electromagnetic waves and make them scatter and attenuate. It converts incident electromagnetic waves into heat energy or other energy forms through various loss mechanisms of materials to achieve the purpose of absorbing electromagnetic waves. The research and development of materials has always been a hot spot both at home and abroad. Among them, some studies have found that metal fibers have excellent electrical conductivity. When compounded with low-dielectric matrices such as resins and rubber, a lower c...

Claims

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Application Information

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IPC IPC(8): C09K3/00D01F8/16D01F8/08D01F1/10D01D5/00C08G73/02
Inventor 黄锋林魏取福乔辉李静蒋淑冬董宪君
Owner JIANGNAN UNIV
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