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High-temperature high-strength flexible zirconium oxide-silicon oxide fiber membrane as well as preparation method and application thereof

A technology of silica fiber and zirconia, which is applied in the direction of fiber chemical characteristics, rayon manufacturing, artificial filament of inorganic raw materials, etc., can solve the problem that the mechanical properties of fiber membranes cannot be guaranteed, high strength and high flexibility cannot be guaranteed, and zirconia cannot be inhibited Grain growth and other problems, to achieve the effect of simple and controllable preparation method, easy industrial production, fine grain size

Active Publication Date: 2020-06-05
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent document CN 109576820A discloses a method for preparing high-strength and high-toughness zirconia nanofibers. However, the heat treatment temperature of this method is 700°C, which is relatively low, and it cannot guarantee that it still has high strength at a high temperature of 1300°C. and high flexibility
Chinese patent document CN 103451851A discloses a method for preparing a flexible and high-strength zirconia nanofiber membrane. By adding metal oxide nanoparticles, the growth of grains can be inhibited at a lower heat treatment temperature, and zirconia can be strengthened at 1000 ° C. The flexibility and strength of the nanofibrous membrane cannot inhibit the growth of zirconia grains at a high temperature of 1300 ° C, and the same cannot guarantee that the fiber membrane has usable mechanical properties at a high temperature of 1300 ° C

Method used

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  • High-temperature high-strength flexible zirconium oxide-silicon oxide fiber membrane as well as preparation method and application thereof
  • High-temperature high-strength flexible zirconium oxide-silicon oxide fiber membrane as well as preparation method and application thereof
  • High-temperature high-strength flexible zirconium oxide-silicon oxide fiber membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A method for preparing high-temperature, high-strength flexible zirconia-silica fiber membrane includes the following preparation steps:

[0049] (1) Add 200g of PAZ to 1000g of absolute ethanol, stir until it is completely dissolved, add 25g of yttrium nitrate, stir until it is completely dissolved, add 2g of polyethylene oxide, dropwise add 60g of deionized water, heat to 45°C, stir until it is completely dissolved Then, 172g of ethyl orthosilicate was added and stirred for 8 hours to obtain a precursor spinning solution.

[0050] (2) Put the precursor spinning solution described in step (1) in the spinning parameters of humidity 45%, temperature 25°C, voltage 11KV, advancing speed 1.5ml / h, receiving distance 20cm, drum receiving speed 80r / min Electrospinning is carried out under the conditions to obtain the precursor fiber membrane; the actual photo is shown in the attached drawing figure 1 Shown.

[0051] (3) Heat the precursor fiber membrane spun in step (2) to obtain Zr...

Embodiment 2

[0054] As described in Example 1, the difference is:

[0055] In step (1), add 200g of PAZ to 667g of absolute ethanol, stir until it is completely dissolved, add 25g of yttrium nitrate, and stir until it is completely dissolved; add 2g of polyethylene oxide, dropwise add 60g of deionized water, heat to 45°C, and stir To completely dissolve, then add 172 g of ethyl orthosilicate and stir for 2 hours to obtain a precursor spinning solution.

[0056] The obtained precursor spinning solution has good spinnability, the precursor fiber is longer than that in Example 1, and the fiber diameter is more uniform. ZrO 2 -SiO 2 The nanofiber membrane has a high degree of orientation, and the SEM picture of the ordered fiber membrane is as image 3 Shown.

Embodiment 3

[0058] As described in Example 1, the difference is:

[0059] In step (1), add 200g of PAZ to 1000g of absolute ethanol, stir until completely dissolved, add 2g of polyethylene oxide, add 60g of deionized water dropwise, heat to 45°C, stir until completely dissolved, then add 172g of ethyl orthosilicate Ester, stir for 8h to obtain the precursor spinning solution;

[0060] Without adding yttrium nitrate, ZrO 2 No phase change, SiO 2 Always amorphous, ZrO 2 -SiO 2 The nanofiber membrane has the same high strength and excellent flexibility.

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Abstract

The invention relates to a high-temperature high-strength flexible zirconium oxide-silicon oxide fiber membrane as well as a preparation method and an application thereof. According to the method, zirconium polyacetylacetonate is used as a zirconium source, a silane coupling agent is used as a silicon source, polyoxyethylene is used as a spinning aid, a zirconium-silicon polymer precursor spinningsolution is prepared, a precursor fiber membrane is obtained through electrostatic spinning, and the high-temperature high-strength flexible zirconium oxide-silicon oxide fiber membrane is obtained through heat treatment. The ZrO2-SiO2 fiber membrane prepared by the preparation method disclosed by the invention has the advantages that the structure is simple; the fibers are highly ordered in arrangement, uniform in diameter, compact in structure, small in grain size and high in strength, have flexible behaviors such as bendable winding, folding and stretching, and have wide application prospects in the fields of structure reinforcing materials, high-temperature flexible refractory materials, fire-fighting thermal insulation materials, flexible electronic devices, chemical corrosion resistant materials, aerospace and the like.

Description

Technical field [0001] The invention relates to a high-temperature high-strength flexible zirconia-silica fiber membrane and a preparation method thereof, in particular to a high-temperature high-strength flexible zirconia-silica fiber membrane with a metal organic polymer with a linear spinnable structure as a precursor and the same The preparation method belongs to the field of inorganic non-metal ceramic fiber materials. Background technique [0002] Due to its extremely high melting point (2710°C), low thermal conductivity, excellent chemical stability and mechanical properties, zirconia has shown its irreplaceability in many applications. Zirconia refractory fiber material not only has the excellent physical and chemical properties of zirconia itself, but also has excellent characteristics such as large aspect ratio, good flexibility and high mechanical strength. It is used in the cutting-edge fields of aerospace and defense, building thermal protection and civil industry. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B35/48C04B35/622D01F1/10D01F9/08
CPCC04B35/14C04B35/48C04B35/62218C04B2235/5454D01F1/10D01F9/08
Inventor 朱陆益彭影谢永帅王新强张光辉许东
Owner SHANDONG UNIV
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