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A high temperature and high strength flexible zirconia-silica fiber membrane and its preparation method and application

A technology of silica fiber and zirconia, applied in the chemical characteristics of fibers, rayon manufacturing, rayon of inorganic raw materials, etc., can solve the problem that the mechanical properties of the fiber membrane cannot be guaranteed, the growth of zirconia grains cannot be inhibited, and the high strength cannot be guaranteed. And high flexibility and other issues, to achieve the effect of simple and controllable preparation method, easy industrial production, excellent high temperature flexibility

Active Publication Date: 2021-08-24
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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  • A high temperature and high strength flexible zirconia-silica fiber membrane and its preparation method and application
  • A high temperature and high strength flexible zirconia-silica fiber membrane and its preparation method and application
  • A high temperature and high strength flexible zirconia-silica fiber membrane and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0049] (1) Add 200g of PAZ to 1000g of absolute ethanol, stir until completely dissolved, add 25g of yttrium nitrate, stir until completely dissolved, add 2g of polyethylene oxide, drop 60g of deionized water, heat to 45°C, stir until completely dissolved , followed by adding 172g of ethyl orthosilicate and stirring for 8h to obtain a precursor spinning solution.

[0050] (2) Spinning the precursor spinning liquid described in step (1) with spinning parameters as humidity 45%, temperature 25°C, voltage 11KV, propulsion 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 physical photos are shown in the accompanying drawings figure 1 shown.

[0051] (3) heat-treat the precursor fiber membrane spun in step (2) to o...

Embodiment 2

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

[0055] In step (1), add 200g of PAZ into 667g of absolute ethanol, stir until completely dissolved, then add 25g of yttrium nitrate, stir until completely dissolved; add 2g of polyethylene oxide, add 60g of deionized water dropwise, heat to 45°C, stir until it was completely dissolved, then 172 g of ethyl orthosilicate was added and stirred 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 of Example 1, and the fiber diameter is more uniform, and the ZrO 2 -SiO 2 The nanofiber membrane has a high degree of orientation, and the SEM pictures of the ordered fiber membrane are as follows: 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, dropwise add 60g of deionized water, heat to 45°C, stir until completely dissolved, then add 172g of ethyl orthosilicate ester, stirred for 8h to obtain the precursor spinning solution;

[0060] No yttrium nitrate added, ZrO 2 No phase change, SiO 2 Always amorphous, ZrO 2 -SiO 2 Nanofibrous membranes have equally high strength and excellent flexibility.

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Abstract

The invention relates to a high-temperature and high-strength flexible zirconia-silica fiber membrane and its preparation method and application. In the method, zirconium polyacetylacetonate is used as a zirconium source, a silane coupling agent is used as a silicon source, and polyethylene oxide is used as a spinning aid , prepare zirconium-silicon polymer precursor spinning solution, obtain precursor fiber membrane by electrospinning, and obtain high-temperature, high-strength and flexible zirconia-silicon oxide fiber membrane after heat treatment. ZrO prepared by the present invention 2 ‑SiO2 2 Fiber membranes have highly ordered fiber arrangement, uniform fiber diameter, dense structure, small grain size, high strength, and flexible behaviors such as bending, winding, folding and stretching. They are used in structural reinforcement materials, high-temperature flexible refractory materials, Fire insulation materials, flexible electronic devices, chemical corrosion-resistant materials, and aerospace and other fields have broad application prospects.

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 linear spinnable structure as a precursor of a metal-organic polymer and its The preparation method belongs to the field of inorganic non-metallic 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 is irreplaceable 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. has an important role. Zirconia fiber is composed of polycrystalline particles, and the crystal grains that make up the fi...

Claims

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Application Information

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Patent Type & Authority Patents(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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