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Method for preparing nano zinc oxide aerogel

A nano-zinc oxide and airgel technology, applied in the field of airgel, can solve the problems of poor porosity and adsorption performance, poor airgel structural strength, etc., to achieve improved adsorption effect, low production cost, and improved dispersion Effect

Active Publication Date: 2018-11-30
ANHUI JINHUA ZINC OXIDE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the actual airgel preparation process, there are still problems such as poor structural strength, poor porosity and adsorption performance of the prepared airgel.

Method used

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  • Method for preparing nano zinc oxide aerogel

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Effect test

Embodiment 1

[0018] A method for preparing airgel containing nano-zinc oxide, is characterized in that, comprises the following steps:

[0019] (1) After mixing 50 parts by weight of saturated ammonia solution and zinc sulfate solution with a concentration of 0.5 mol / L at a volume ratio of 3:1, stir at 500 rpm for 10 minutes, and then raise the temperature of the mixture to 65 °C, sonicate for 10 minutes to obtain nano-zinc oxide precursor dispersion;

[0020] (2) modifying the nano-zinc oxide precursor dispersion obtained in step (1) to obtain a modified nano-zinc oxide precursor;

[0021] (3) Dissolve 10 parts of ethyl orthosilicate in distilled water to make a solution of ethyl orthosilicate with a concentration of 0.5mol / L, then slowly add 3 parts of oxalic acid solution of 0.6mol / L dropwise, at 35°C, Sonicate for 2 hours, then adjust the pH value to 6, stir at 700rpm for 20 minutes, add the product from step (2), and continue to disperse for 10 minutes to obtain a mixed dispersion; ...

Embodiment 2

[0027] A method for preparing airgel containing nano-zinc oxide, is characterized in that, comprises the following steps:

[0028] (1) After mixing 70% saturated ammonia solution in parts by weight and zinc sulfate solution with a concentration of 0.7mol / L at a volume ratio of 4:1, stir at 550rpm for 12min, and then raise the temperature of the mixture to 70°C °C, sonicate for 11 minutes to obtain nano-zinc oxide precursor dispersion;

[0029] (2) modifying the nano-zinc oxide precursor dispersion obtained in step (1) to obtain a modified nano-zinc oxide precursor;

[0030] (3) Dissolve 14 parts of ethyl orthosilicate in distilled water to make a solution of ethyl orthosilicate with a concentration of 0.8mol / L, then slowly add 4 parts of oxalic acid solution of 0.7mol / L dropwise, at 40°C, Ultrasonic treatment for 3 hours, then adjust the pH value to 7, stir at 750rpm for 22 minutes, add the result of step (2), and continue to disperse for 12 minutes to obtain a mixed dispersi...

Embodiment 3

[0036] A method for preparing airgel containing nano-zinc oxide, is characterized in that, comprises the following steps:

[0037] (1) Mix 100% saturated ammonia solution in parts by weight and zinc sulfate solution with a concentration of 1mol / L at a volume ratio of 4:1, stir at 600rpm for 15min, and then raise the temperature of the mixture to 75°C , sonicated for 12 minutes to obtain nano zinc oxide precursor dispersion;

[0038] (2) modifying the nano-zinc oxide precursor dispersion obtained in step (1) to obtain a modified nano-zinc oxide precursor;

[0039] (3) Dissolve 20 parts of ethyl orthosilicate in distilled water to make a solution of ethyl orthosilicate with a concentration of 1mol / L, then slowly add 5 parts of 0.8mol / L oxalic acid solution dropwise, at 45°C, ultrasonically Treat for 3 hours, then adjust the pH value to 7, stir at 800 rpm for 25 minutes, then add the product from step (2), and continue to disperse for 15 minutes to obtain a mixed dispersion;

...

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PUM

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Abstract

The invention discloses a method for preparing nano zinc oxide aerogel. The prepared aerogel comprising nano zinc oxide has high porosity and absorption effect, can be applied to the technical field of dye absorption and purification, is low in production cost and simple in operation, and can realize the continuous production; and ultrasonic treatment operation is used in the preparation process of a nano zinc oxide precursor, so that the prepared precursor is small and uniform in particle size, when used as the aerogel skeleton material in the later period, the porosity of the aerogel can beimproved, and the absorption effect can be improved.

Description

technical field [0001] The invention belongs to the technical field of airgel, in particular to a method for preparing airgel containing nanometer zinc oxide. Background technique [0002] Airgel is a solid amorphous material with a nanoporous network structure formed by the aggregation of colloidal particles. It has an extremely low density and is known as "solid smoke". Airgel also has high porosity, high specific surface area, low thermal conductivity, low dielectric coefficient, low refractive index, low elastic modulus, low acoustic impedance, strong adsorption, etc., and its performance can be continuous with the control of the structure. Adjustability. The excellent performance of airgel makes it have very broad application prospects in the fields of thermal insulation, catalysis, energy conservation and environmental protection, petrochemical industry, and aerospace. [0003] However, in the actual airgel preparation process, there are still problems such as poor s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/28B01J20/30B01J13/00
CPCB01J13/0091B01J20/06B01J20/103B01J20/28047B01J2220/4806B01J2220/4812
Inventor 张训龙
Owner ANHUI JINHUA ZINC OXIDE CO LTD
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