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A preparation method of chromium-cobalt composite oxide nanofiber doped with rare earth

A technology of composite oxides and nanofibers, applied in the field of nanomaterials, can solve the problems of high manufacturing process requirements, high manufacturing costs, and low manufacturing costs, and achieve the effects of strong near-infrared reflection ability, high temperature resistance and weather resistance

Active Publication Date: 2017-09-19
QUANGANG PETROCHEM RES INST OF FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, nanomaterials require high production process and high production cost, while the production process of nanofibers is relatively simple and low in production cost, and there is no report on the use of metal oxide nanofibers in anti-near-infrared camouflage coatings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of rare earth-doped chromium-cobalt composite oxide nanofiber spinning solution

[0025] At room temperature, after dissolving a certain amount of polyvinyl alcohol (PVA) and polyvinyl pyrrolidone in an organic acid solvent, add chromium acetate, cobalt acetate, and scandium nitrate to dissolve to form a uniform transparent solution. The weight percentage of each component is as follows :

[0026] Organic acid solvent 60%

[0027] Polyvinyl alcohol (PVA) 10%

[0028] Polyvinylpyrrolidone 5%

[0029] Chromium acetate 4%

[0030] Cobalt Acetate 4%

[0031] Scandium acetate 1%

[0032] (2) Preparation of rare earth-doped chromium-cobalt composite oxide nanofibers

[0033] The chromium-cobalt composite oxide nanofibers doped with cerium rare earth ions were prepared by electrospinning with an electrospinner. The electrospinning parameters are: voltage 10kV, the distance between the spinneret and the receiving aluminum foil or metal mesh is 10cm, the f...

Embodiment 2

[0035] (1) Preparation of chromium-cobalt composite oxide nanofiber spinning solution doped with rare earth ions

[0036] At room temperature, after dissolving a certain amount of polyvinyl alcohol (PVA) and polyvinyl pyrrolidone in an organic acid solvent, add chromium acetate, cobalt acetate, and lanthanum nitrate to dissolve to form a uniform transparent solution, and the weight percentage of each component is as follows :

[0037] Organic acid solvent 70%

[0038] Polyvinyl alcohol (PVA) 20%

[0039] Polyvinylpyrrolidone 10%

[0040] Chromium acetate 8%

[0041] Cobalt Acetate 8%

[0042] Lanthanum acetate 4%

[0043] (2) Preparation of chromium-cobalt composite oxide nanofibers doped with rare earth ions

[0044] The chromium-cobalt composite oxide nanofibers doped with cerium rare earth ions were prepared by electrospinning with an electrospinner. The electrospinning parameters are: voltage 15kV, the distance between the spinneret and the receiving aluminum foil o...

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Abstract

The invention provides a method for preparing chromium-cobalt composite oxide nanofibers doped with rare earth ions, which includes: (1) dispersing PVA, PVP, chromium salts, cobalt salts, and rare earth nitrate salts into organic solvents to form transparent and uniform Nanofiber spinning solution; (2) Electrospinning, high-temperature calcination, crushing and sieving of nanofiber spinning solution to obtain chromium-cobalt composite oxide nanofibers doped with rare earth ions, the chromium-cobalt composite oxide nanofibers doped with rare earth ions prepared in the present invention Cobalt composite oxide nanofibers have excellent high temperature resistance and weather resistance; a layer of mixed coating of C, H, and O elements is formed on the surface, making the interface with the resin excellent; and due to the splitting of energy levels And formed, showing a strong near-infrared reflection ability, can be used as a special pigment for anti-near-infrared camouflage coatings.

Description

technical field [0001] The invention belongs to the field of nanometer materials, in particular to a method for preparing rare earth-doped chromium-cobalt composite oxide nanofibers. Background technique [0002] Anti-near-infrared camouflage coating is mainly developed for the detection capability of modern optical reconnaissance equipment in the wavelength range of 380nm to 1100nm. It is a coating that can simulate the optical performance of camouflaged targets and background environments, thereby reducing the detectability of camouflaged targets. With the modernization of weapons and equipment and the development and improvement of near-infrared reconnaissance equipment, the threat of near-infrared reconnaissance to camouflaged targets is increasing. At present, the armies of most countries are equipped with various near-infrared reconnaissance equipment to varying degrees, such as intensifiers, starlight mirrors, infrared night vision devices, night vision goggles and ot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/08C09D5/30
Inventor 陈登龙陈昕雄刘金玲陈嘉炼林杰
Owner QUANGANG PETROCHEM RES INST OF FUJIAN NORMAL UNIV