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A kind of nanometer alumina hydrosol coating and preparation method thereof

A technology of nano-alumina and hydrosol, applied in the direction of alumina/aluminum hydroxide, coating, etc., to achieve the effect of dense film arrangement, low light attenuation, and high luminous flux maintenance rate

Active Publication Date: 2015-09-30
FOSHAN CNLIGHT E COMMERCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this process is that although the gas-phase nano-alumina powder is nano-scale, its secondary particle size often reaches hundreds of nanometers or even several microns after dispersion, coating and drying processes. Under the action of interfacial tension, pinholes and cracks will appear in the film layer, which will weaken the protective effect of the protective film on the lamp tube

Method used

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  • A kind of nanometer alumina hydrosol coating and preparation method thereof
  • A kind of nanometer alumina hydrosol coating and preparation method thereof
  • A kind of nanometer alumina hydrosol coating and preparation method thereof

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Embodiment 1

[0023] 1. Preparation of nano-alumina hydrosol coating:

[0024] (1) Mix ethanol and glacial acetic acid at a molar ratio of 37:1 and stir at a constant speed for 15 minutes to obtain a precursor;

[0025] (2) Mix ethanol and deionized water at a molar ratio of 38:100 and stir at a constant speed for 15 minutes to obtain a dropwise solution;

[0026] (3) Add aluminum sec-butoxide to the precursor of step (1) so that the molar ratio of aluminum sec-butoxide, ethanol and glacial acetic acid is 1:37:1, and stir at a constant speed for 30 minutes to obtain the mixed solution I ;

[0027] (4), add the dropwise solution of step (2) to the mixed solution I of step (3), make the molar ratio of deionized water to aluminum sec-butoxide 100:1, then stir at a constant speed for 60 minutes to obtain a mixed Liquid II;

[0028] (5) Add deionized water to the mixed liquid II in step (4), so that the molar ratio of newly added deionized water to aluminum sec-butoxide is 380:1, and then age...

Embodiment 2

[0039] 1. Preparation of nano-alumina hydrosol coating:

[0040] (1) Mix ethanol and glacial acetic acid in a molar ratio of 43:1 and stir at a constant speed for 15 minutes to obtain a precursor;

[0041] (2) Mix ethanol and deionized water at a molar ratio of 38:100 and stir at a constant speed for 15 minutes to obtain a dropwise solution;

[0042] (3) Add aluminum sec-butoxide to the precursor of step (1), so that the molar ratio of aluminum sec-butoxide, ethanol and glacial acetic acid is 1:43:1, and stir at a constant speed for 300 minutes to obtain the mixed solution I ;

[0043] (4), add the dropwise solution of step (2) to the mixed solution I of step (3), make the molar ratio of deionized water to aluminum sec-butoxide 100:1, then stir at a constant speed for 600 minutes to obtain a mixed Liquid II;

[0044] (5) Add deionized water to the mixed liquid II in step (4), so that the molar ratio of newly added deionized water to aluminum sec-butoxide is 380:1, and then ...

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Abstract

Invention discloses nano aluminum oxide hydrosol paint and a preparation method thereof. The preparation method comprises the following steps: mixing ethanol and glacial acetic acid according to a mol ratio of (37-43):1, and stirring at a uniform speed for 15 minutes to obtain a precursor; mixing ethanol and deionized water according to a mol ratio of 38:100, and stirring at a uniform speed for 15 minutes to obtain a dropwise addition solution; adding aluminum tri-sec-butoxide into the precursor, ensuring that the mol ratio of the aluminum tri-sec-butoxide, the ethanol and the glacial acetic acid is 1:(37-43):1, and stirring at a uniform speed for 30-300 minutes to obtain a mixed solution I; adding the dropwise addition solution into the mixed solution I, ensuring that the mol ratio of the deionized water to the aluminum tri-sec-butoxide is 100:1, and stirring at a uniform speed for 60-600 minutes to obtain a mixed solution II; and adding deionized water into the mixed solution II, ensuring that the mol ratio of the newly added deionized water to the aluminum tri-sec-butoxide is 380:1, and aging for 24 hours to obtain the nano aluminum oxide hydrosol paint.

Description

Technical field: [0001] The invention relates to a coating for the glass inner wall of a lamp tube, in particular to a nano-alumina hydrosol coating and a preparation method thereof. Background technique: [0002] As we all know, during the ignition process of low-pressure gas discharge lamps, the sodium ions in the lamp tube glass, under the combined action of plasma and heat, continuously migrate from the lamp tube glass to the inner wall of the tube, and are reduced to sodium by electrons and then react with mercury , forming gray-black sodium amalgam and attached to the inner wall of the glass tube. [0003] At present, the common method to solve the above problems is to coat the inner wall of the lamp tube glass with a protective film formed by coating a dispersion liquid coating obtained with gas-phase nano-alumina and drying it. The problem with this process is that although the gas-phase nano-alumina powder is nano-scale, its secondary particle size often reaches h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C01F7/02
Inventor 柴国生吴文东
Owner FOSHAN CNLIGHT E COMMERCE CO LTD