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A kind of preparation method of flexible high-strength zirconia nanofiber membrane

A technology of nanofiber membrane and zirconia, which is applied in the direction of heating/cooling fabrics, non-woven fabrics, textiles and papermaking, etc., which can solve the problems of low yield, complicated preparation process, high fiber brittleness and cannot be used alone, and achieve enhanced flexibility Sexuality and strength, growth-inhibiting effect

Active Publication Date: 2016-05-11
嘉兴富瑞邦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

The preparation methods of zirconia fiber materials mainly include sol-gel method, blend spinning method, spinning method, impregnation method, etc. The zirconia fibers prepared by these methods are mostly composed of zirconia micro-particles, and the fiber diameters are on the order of microns At the same time, the fiber cannot be used alone because of its high brittleness, and it needs to be made into fiber fabrics, fiberboards, fiber felts and other products, which greatly limits its practical application
However, these patents require the addition of metal salt additives and polymers during the preparation of zirconia ceramic fibers, which not only complicates the preparation process but also lowers the zirconia content in the hybrid fiber, resulting in a low overall yield. At the same time, the metal salt is expensive and difficult to Realize industrial production of zirconia nanofibers

Method used

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  • A kind of preparation method of flexible high-strength zirconia nanofiber membrane
  • A kind of preparation method of flexible high-strength zirconia nanofiber membrane
  • A kind of preparation method of flexible high-strength zirconia nanofiber membrane

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Embodiment 1

[0044] A method for preparing a flexible high-strength zirconia nanofiber membrane, the specific steps are:

[0045]Step 1: Dissolve zirconium carbonate in formic acid at a ratio of 100g:100mL, add calcium oxide nanoparticles with a particle size of 5-10nm under stirring conditions, continue stirring and aging, and obtain a viscosity of 40Pa·S and a conductivity of 10mS / m colloidal solution; wherein, the molar ratio of zirconium carbonate and calcium oxide is 1:0.01;

[0046] The second step: under the conditions of room temperature 20°C and relative humidity 30%, the colloidal solution is subjected to electrospinning to obtain a gel nanofiber membrane; The flow rate is input to the spinneret of the electrospinning equipment, and at the same time, the spinneret is connected to a 25kV high-voltage power supply for electrospinning, and the distance between the receiving device and the spinneret is 10cm;

[0047] The third step: vacuum-dry the gel nanofiber membrane at 50°C and...

Embodiment 2

[0049] A method for preparing a flexible high-strength zirconia nanofiber membrane, the specific steps are:

[0050] The first step: dissolving zirconium acetate in water according to the ratio of 100g:50mL, adding zirconia and yttrium oxide nanoparticles with a particle size of 40-50nm under the condition of stirring with a magnetic stirrer at a speed of 100rpm at room temperature, wherein zirconia and yttrium oxide nanoparticles The mass ratio of yttrium oxide nanoparticles was 1:1, and the magnetic stirrer was used to continue stirring at 20rpm for 1h, and the solution was further aged at 40°C for 5h, and finally the viscosity was 1000Pa·S and the conductivity was 20mS / The colloidal solution of m; Wherein, the molar ratio of zirconium acetate and nano particle is 1:0.07;

[0051] Step 2: Under the conditions of room temperature 28°C and relative humidity 40%, the colloidal solution is subjected to electrospinning to obtain a gel nanofiber membrane; The flow rate is input ...

Embodiment 3

[0054] A method for preparing a flexible high-strength zirconia nanofiber membrane, the specific steps are:

[0055] Step 1: Dissolve zirconium acetylacetonate in isopropanol according to the ratio of 100g:200mL, add alumina nanoparticles with a particle size of 5-15nm under the condition of stirring with a magnetic stirrer at a speed of 250rpm at room temperature, and use magnetic stirring After continuing to stir at 200rpm for 6h, the solution was further aged at 60°C for 24h, and finally a colloidal solution with a viscosity of 1500Pa·S and a conductivity of 50mS / m was obtained; wherein the molar ratio of zirconium acetylacetonate to alumina 1:0.20;

[0056] The second step: under the conditions of room temperature 25 ℃ and relative humidity 70%, the colloidal solution is subjected to electrospinning to obtain a gel nanofiber membrane; The flow rate is input to the spinneret of the electrospinning equipment, and at the same time, the spinneret is connected to a 25kV high-v...

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Abstract

The invention relates to a preparation method of a flexible high-strength zirconia nanofiber membrane. The method comprises the following specific steps of: dissolving zirconium salt into a solvent at room temperature, mixing and stirring with metal oxide nanoparticles, and ageing to obtain a colloidal solution; inputting the colloidal solution onto the spinning head of electrostatic spinning equipment, and connecting the spinning head with a high-voltage power supply for performing electrostatic spinning so as to obtain a gel nanofiber membrane; putting the gel nanofiber membrane into a vacuum drying box for drying, putting into a box type resistance furnace for high-temperature calcining so as to obtain a tetragonal crystal flexible high-strength zirconia nanofiber membrane of which the fiber diameter is 10 nanometers to 10 mum and the grain size is 5-100 nanometers. The preparation process of the preparation method is simple, the cost is low, the obtained zirconia nanofiber membrane has high flexibility, and the tensile strength is 10-1,000 MPa; meanwhile, the material has excellent high temperature resistance, corrosion resistance and heat insulating performance, and has wide application prospects in the fields of high temperature filtration, catalyzing, heat insulation, personal protection, aviation and the like.

Description

technical field [0001] The invention relates to a method for preparing a flexible and high-strength zirconia nanofiber membrane, in particular to a method for preparing a flexible and high-strength zirconia nanofiber membrane using metal oxide nanoparticles as a stabilizer. Background technique [0002] As a polycrystalline refractory fiber material, zirconia fiber can be used for a long time in an ultra-high temperature oxidizing atmosphere above 1500°C, the maximum service temperature is as high as 2200°C, and it can still maintain a complete fiber shape even up to 2500°C, and its high temperature It has stable chemical properties, corrosion resistance, oxidation resistance, thermal shock resistance, non-volatility, and no pollution. It is currently the top refractory fiber material in the world. The preparation methods of zirconia fiber materials mainly include sol-gel method, blend spinning method, spinning method, impregnation method, etc. The zirconia fibers prepared b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/4209D04H1/728D06C7/00C04B35/48C04B35/622
Inventor 丁彬毛雪陈越成孙刚俞建勇
Owner 嘉兴富瑞邦新材料科技有限公司