A method for preparing yttrium zirconate nanofibers from a zirconium-yttrium polymer precursor

A nanofiber and polymer technology, applied in the chemical characteristics of fibers, textiles and papermaking, etc., can solve the problems of difficult to achieve nanofiber preparation, high solid-phase reaction temperature, and inability to obtain precursors, and achieve easy mass production, The effect of uniform fiber diameter and dense structure

Active Publication Date: 2021-05-28
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above yttrium zirconate materials are mainly prepared by solid-phase reaction, co-precipitation method, and sol-gel-combustion method. The solid-phase reaction temperature is very high, which is not suitable for preparing nanofibers; the co-precipitation method cannot obtain a uniform precursor. , it is difficult to achieve the preparation of nanofibers; the sol-gel-combustion method is also difficult to prepare nanofibers due to the intense heat release during the combustion process, which will destroy the structure of the fibers

Method used

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  • A method for preparing yttrium zirconate nanofibers from a zirconium-yttrium polymer precursor
  • A method for preparing yttrium zirconate nanofibers from a zirconium-yttrium polymer precursor
  • A method for preparing yttrium zirconate nanofibers from a zirconium-yttrium polymer precursor

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A kind of zirconium-yttrium polymer is the method that precursor prepares yttrium zirconate fiber, comprises the following preparation steps:

[0032] (1) Dissolve 1mol zirconium oxychloride octahydrate and 1mol yttrium chloride hexahydrate in 2000g of anhydrous methanol, add 210g acetylacetone and 500g triethylamine successively after dissolving completely (zirconium oxychloride octahydrate: acetylacetone : the mol ratio of triethylamine is 1:2.1:4.9), obtains yellow solution after stirring 5h;

[0033] (2) Transfer the yellow solution obtained in step (1) to a round-bottomed flask and concentrate and dry under reduced pressure at 40° C. to obtain a zirconium-yttrium polymer precursor containing triethylamine hydrochloride;

[0034] (3) Soak the zirconium-yttrium polymer precursor containing triethylamine hydrochloride obtained in step (2) with 4000mL acetone, and let it stand at room temperature for 72h, then filter out triethylamine hydrochloride to obtain zirconium-...

Embodiment 2

[0040] As described in Example 1, the difference is:

[0041] In step (1), 1mol zirconium oxychloride octahydrate and 1mol yttrium chloride hexahydrate are dissolved in 2000g anhydrous methanol, add 150g acetylacetone and 435g triethylamine (zirconium oxychloride octahydrate: Acetylacetone: the molar ratio of triethylamine is 1:1.5:4.3), after stirring for 5h, a yellow solution was obtained.

Embodiment 3

[0043] As described in Example 1, the difference is:

[0044] In step (1), 1mol zirconium oxychloride octahydrate and 1mol yttrium chloride hexahydrate are dissolved in 2000g anhydrous methanol, after dissolving completely, add 300g acetylacetone and 607g triethylamine successively respectively (zirconium oxychloride octahydrate: Acetylacetone: the molar ratio of triethylamine is 1:3:6), after stirring for 5h, a yellow solution was obtained.

[0045] Example 3

[0046] As described in Example 1, the difference is:

[0047] As described in step (3), soak the zirconium-yttrium polymer precursor containing triethylamine hydrochloride obtained in step (2) with 4000mL acetone, and leave it at room temperature for 48h, then filter out triethylamine hydrochloride to obtain zirconium - A solution of yttrium polymer precursor in acetone.

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Abstract

The invention relates to a method for preparing yttrium zirconate nanofibers from a zirconium-yttrium polymer precursor, comprising the following steps: using zirconium-yttrium acetylacetonate polymer as a precursor, absolute ethanol as a solvent, and polyethylene oxide as a spinning aid agent, and configure the spinning solution; the spinning solution is electrospun to obtain PAY-Z precursor fibers; the PAY-Z precursor fibers are heat-treated to obtain yttrium zirconate nanofibers. The yttrium zirconate fiber prepared by the invention has uniform diameter, compact structure and good flexibility, and can be used as a structural reinforcement material, a flexible luminous matrix, a high-temperature refractory material, a catalyst carrier, and the like.

Description

technical field [0001] The invention relates to a zirconium-yttrium polymer precursor to prepare yttrium zirconate (Y 2 Zr 2 o 7 ) fiber, which belongs to the field of ceramic fiber new material preparation. Background technique [0002] Rare earth zirconates are a class of very versatile materials. Due to its high melting point, high chemical stability, high ionic conductivity, low thermal conductivity, high catalytic activity and other excellent properties, it is widely used in refractory materials, thermal barrier coatings, catalysis, photoluminescence, solid electrolytes, radioactive nuclear waste treatment and other fields. Yttrium is a kind of rare earth with relatively large reserves, no matter in terms of cost or availability of raw materials, yttrium zirconate (Y 2 Zr 2 o 7 ) has a great advantage. Yttrium zirconate has a cubic phase and a defect-state fluorite structure, and is widely used in catalysis, photoluminescence, thermal barrier coatings, refractor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/10C08G83/00
Inventor 朱陆益谢永帅汪林王新强张光辉许东彭影
Owner SHANDONG UNIV
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