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Strontium titanate/polypyrrole nanocomposite fiber with one-dimensional core-shell structure, and preparation method thereof

A nano-composite fiber, core-shell structure technology, applied in fiber processing, fiber chemical characteristics, conjugated synthetic polymer rayon, etc., can solve problems such as narrow absorption frequency band, and achieve wide absorption frequency band and good dispersion stability. , the effect of good one-dimensional topography

Active Publication Date: 2018-10-12
河南皮米新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a single conductive polymer has good wave-absorbing characteristics, its absorption frequency band is relatively narrow. Nowadays, conductive polymer wave-absorbing materials are usually combined with other materials to broaden the absorption frequency band.

Method used

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  • Strontium titanate/polypyrrole nanocomposite fiber with one-dimensional core-shell structure, and preparation method thereof
  • Strontium titanate/polypyrrole nanocomposite fiber with one-dimensional core-shell structure, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing strontium titanate / polypyrrole nanocomposite fibers with a one-dimensional core-shell structure, the steps are as follows:

[0021] (1) Preparation of strontium titanate nanofibers by electrospinning method: according to SrCO 3 The ratio of the amount of titanium tetraisopropoxide to the substance is 1:1. Weigh the raw materials, dissolve the raw materials in dilute hydrochloric acid with a volume fraction of 2%, add high polymer PVP to prepare spinning solution, high polymer PVP and The mass ratio of dilute hydrochloric acid is 1:2; the spinning solution is added to a spinning machine for spinning to prepare composite nanofibers, and the composite nanofibers are put into a muffle furnace for heat treatment to obtain strontium titanate nanofibers;

[0022] (2) Add ferric chloride and polyvinylpyrrolidone to alcohol to form a uniform solution, and disperse strontium titanate nanofibers into the above solution, and the ferric chloride, polyvinylpyrr...

Embodiment 2

[0027] A method for preparing strontium titanate / polypyrrole nanocomposite fibers with a one-dimensional core-shell structure, the steps are as follows:

[0028] (1) Preparation of strontium titanate nanofibers by electrospinning method: according to SrCO 3 The ratio of the amount of titanium to tetraisopropoxide is 1:1. Weigh the raw materials, dissolve the raw materials in dilute hydrochloric acid with a volume fraction of 4%, add high polymer PVP to prepare spinning solution, high polymer PVP and The mass ratio of dilute hydrochloric acid is 1:3; the spinning solution is added to a spinning machine for spinning to prepare composite nanofibers, and the composite nanofibers are put into a muffle furnace for heat treatment to obtain strontium titanate nanofibers;

[0029] (2) Ferric chloride and polyvinylpyrrolidone will be added to alcohol to form a uniform solution, and strontium titanate nanofibers will be dispersed into the above solution. The ferric chloride, polyvinylpyr...

Embodiment 3

[0032] A method for preparing strontium titanate / polypyrrole nanocomposite fibers with a one-dimensional core-shell structure, the steps are as follows:

[0033] (1) Preparation of strontium titanate nanofibers by electrospinning method: according to SrCO 3 The ratio of the amount of titanium tetraisopropoxide to the substance is 1:1. Weigh the raw materials, dissolve the raw materials in dilute hydrochloric acid with a volume fraction of 5%, add high polymer PVP to prepare spinning solution, high polymer PVP and The mass ratio of dilute hydrochloric acid is 1:4; the spinning solution is added to a spinning machine for spinning to prepare composite nanofibers, and the composite nanofibers are put into a muffle furnace for heat treatment to obtain strontium titanate nanofibers;

[0034] (2) Ferric chloride and polyvinylpyrrolidone will be added to alcohol to form a uniform solution, and strontium titanate nanofibers will be dispersed into the above solution. The ferric chloride...

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Abstract

The invention provides a strontium titanate / polypyrrole nanocomposite fiber with a one-dimensional core-shell structure, and a preparation method thereof. The nanocomposite fiber is composed of a polymer polypyrrole body and a barium strontium titanate nanofiber material, and the barium strontium titanate nanofiber is coated with the polypyrrole to form the core-shell structure. The barium strontium titanate / polypyrrole nanocomposite fiber with the core-shell structure is prepared by an electrospinning process combined gas phase polymerization technology, and the core-shell structure of the barium strontium titanate / polypyrrole nanocomposite fiber is formed by adopting barium strontium titanate as a hard template and polyvinylpyrrolidone as a soft template in the polymerization process. The one-dimensional fibrous wave absorbing material has obvious better wave absorbing ability than a spherical wave absorbing material, the shell thickness of the composite fiber is controllable, and the material of the shell has good electrical conductivity, so the expansion of the wave absorbing band of the composite material is benefited, and the composite nanofiber has the advantages of good one-dimensional morphology, uniform size distribution, good dispersion stability, and simple and easy preparation process.

Description

technical field [0001] The invention belongs to the field of preparation of functional materials, and in particular relates to a strontium titanate / polypyrrole nanocomposite fiber with a one-dimensional core-shell structure and a preparation method. 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. At present, it is difficult for a single absorbing material to meet the development requirements of strong absorption, wide frequency band, thin thickness, light weight, corrosion resistance and low cost. Combining materials with different absorbing characteristics is an effective way to improve the performance of absorbing materials . Barium titanate absorbing materials are mainly based on dielectric loss, mainly including conductance loss, relaxation polarization loss and resonance loss....

Claims

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Application Information

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IPC IPC(8): D01F8/18D01F8/16D01D5/34
CPCD01D5/34D01F8/16D01F8/18
Inventor 刘少辉王娇郝好山赵利敏
Owner 河南皮米新材料科技有限公司
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