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Method for preparing zirconia aerogel material

A technology of zirconia and aerogel, applied in the direction of zirconia, can solve the problems of difficult preparation, transportation and storage, high price, high toxicity, etc., and achieve the effects of large-scale production, simple preparation process, and increased resilience

Inactive Publication Date: 2016-06-29
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] (1) Using zirconium organic alkoxide as the precursor, zirconium alkoxide is easy to hydrolyze and deteriorate, difficult to prepare, transport and store, expensive and highly toxic
[0010] (2) Using supercritical drying process, supercritical drying consumes high energy, is dangerous, expensive and complicated equipment, inconvenient to operate, and difficult to carry out continuous and large-scale production

Method used

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  • Method for preparing zirconia aerogel material
  • Method for preparing zirconia aerogel material
  • Method for preparing zirconia aerogel material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Preparation of sol

[0042] Take by weighing 31.3267 grams of absolute ethanol, 0.5806 grams of distilled water, and dissolve 0.0277 grams of polyacrylic acid in absolute alcohol and distilled aqueous solution to make solution A;

[0043] Weigh 1.8793 grams of zirconium tetrachloride according to the metering ratio, add solution A dropwise to the container containing zirconium tetrachloride and stir until it is completely dissolved, then add 0.5247 grams of ethyl acetoacetate dropwise, continue stirring for 15 minutes and then add dropwise 0.3632 grams of formamide, after continuous stirring for 15 minutes, dropwise add 2.3419 grams of propylene oxide at a rate of 0.5-1ml / s in an ice bath, continue to stir for 0.5 hours, then put them into vials and let stand to change. for sol;

[0044] (2) Aging of sol

[0045] Place the sol prepared in step (1) in a constant temperature water bath at 70°C for aging for a total of 5 days;

[0046] (3), solvent replacement

[0...

Embodiment 2

[0054] (1) Preparation of sol

[0055] Take by weighing 31.3267 grams of absolute ethanol, 0.5806 grams of distilled water, and dissolve 0.0242 grams of polyacrylic acid in absolute alcohol and distilled aqueous solution to make solution A;

[0056] Weigh 1.8793 grams of zirconium tetrachloride according to the metering ratio, add solution A dropwise to the container containing zirconium tetrachloride and stir until it is completely dissolved, then add 0.5247 grams of ethyl acetoacetate dropwise, continue stirring for 15 minutes and then add dropwise 0.3632 grams of formamide, after stirring for 15 minutes, add 2.3419 grams of propylene oxide drop by drop at a rate of 0.5-1ml / s in the state of ice bath, continue stirring for 0.5 hours, put into small bottles and let stand become a sol;

[0057] (2) Aging of sol

[0058] Place the sol prepared in step (1) in a constant temperature water bath at 70°C for aging for a total of 5 days;

[0059] (3), solvent replacement

[0060]...

Embodiment 3

[0067] (1) Preparation of sol

[0068] Take by weighing 31.3267 grams of absolute ethanol, 0.5806 grams of distilled water, and dissolve 0.0215 grams of polyacrylic acid in absolute alcohol and distilled aqueous solution to make solution A;

[0069] Weigh 1.8793 grams of zirconium tetrachloride according to the metering ratio, add solution A dropwise to the container containing zirconium tetrachloride and stir until it is completely dissolved, then add 0.5247 grams of ethyl acetoacetate dropwise, continue stirring for 15 minutes and then add dropwise 0.3632 grams of formamide, after stirring for 15 minutes, add 2.3419 grams of propylene oxide drop by drop at a rate of 0.5-1ml / s in the state of ice bath, continue stirring for 0.5 hours, put into small bottles and let stand become a sol;

[0070] (2) Aging of sol

[0071] Place the sol prepared in step (1) in a constant temperature water bath at 70°C for aging for a total of 5 days;

[0072] (3), solvent replacement

[0073]...

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Abstract

The invention discloses a method for preparing a zirconia aerogel material. Zirconium tetrachloride is used as a precursor, a mixed solution of absolute ethyl alcohol and distilled water is used as a solvent, epoxypropane is used as an inductive agent of net gel, ethyl acetoacetate is used as a complexing agent, polyacrylic acid is used as a modifier, formamide is used as a chemical drying and controlling additive, and the zirconia aerogel material is prepared by virtue of the drying at the normal temperature in a sol-gel method. The preparation process is simple, zirconium tetrachloride which is low in price is used as the precursor, and the zirconia aerogel is prepared by adopting a normal pressure drying method, so that the weaknesses of the supercritical drying method that the cost is high, the danger is high and the mass production is not facilitated can be overcome; and moreover, the flexible organic high-molecular modifier is used for the modification in an in-site method, the resilience of the gel is improved, the damage of the aerogel structure due to the capillary force in the normal-pressure drying process is reduced, and the method has the characteristics of low production cost.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to an airgel material, in particular to a method for preparing a zirconia airgel material. Background technique [0002] Airgel generally refers to a lightweight nano-solid-state material with a nanoporous network formed by the aggregation of nanoparticles as the skeleton, and filled with a gaseous dispersion medium in the network skeleton pores. Nanomaterials are a new type of material that emerged in the 1980s. Its excellent performance has aroused keen attention from all over the world, and it is even believed that it will change our lives. The nanoscale refers to the range of 1-100nm. At this scale, substances will exhibit effects different from macroscopic substances and microscopic particles, such as: surface effects, quantum effects, small size effects, dielectric confinement effects, and macroscopic quantum tunneling. effect. These effects make nanomaterials have many special...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/02
CPCC01G25/02C01P2004/03
Inventor 张睿穆艳菡邵霞金双玲金鸣林孟婷婷王孝龙岳齐张晓康
Owner SHANGHAI INST OF TECH