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Preparation method for colored silicon oxide aerogel

A technology of silica aerogel and silica sol, which is applied in the field of materials, can solve the problems of single color, poor fastness and poor color rendering of silica aerogel, and achieves high color fastness, difficult elution and chemical segregation. small effect

Inactive Publication Date: 2015-11-25
SICHUAN KENINGTAI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is to solve the problem of single color and poor color rendering of silica airgel at present, and at the same time overcome the problem of poor fastness caused by traditional physical dyeing

Method used

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  • Preparation method for colored silicon oxide aerogel
  • Preparation method for colored silicon oxide aerogel
  • Preparation method for colored silicon oxide aerogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Mix TEOS and ethanol evenly (the molar ratio of the two is 1:20), mix well, and add an aqueous solution containing neodymium nitrate (the molar ratio of water and TEOS is 1:2, and the mass of neodymium accounts for 0.1% of the gel matrix. %), after mixing evenly, add ammonia water with a molar ratio of 0.001 to TEOS, stir vigorously, and leave to form a gel. After aging at room temperature for 3 hours, the gel is washed with 200ml of ethanol for three times. The gel is then placed in an autoclave, using ethanol as a drying medium, and the purple aerogel can be obtained after drying. Its SEM scanning electron microscope pictures are shown in figure 1 .

Embodiment 2

[0034] Mix TMOS and methanol evenly (the molar ratio of the two is 1:12), mix well, and add an aqueous solution containing ferric nitrate (the molar ratio of water and TMOS is 1:4, and the mass of iron accounts for 10% of the gel matrix. %), after mixing evenly, add citric acid with a molar ratio of 0.1 to TMOS, stir vigorously, seal the sol and place it in an oven at 40°C for aging for 48h, and then wash it with 200ml methanol for three times. Then the gel is placed in an autoclave, and methanol is used as a drying medium. After drying, a brown airgel can be obtained. The SEM scanning electron microscope picture is shown in figure 2 .

Embodiment 3

[0036] Mix TMOS and ethanol evenly (the molar ratio of the two is 1:8), mix well, and add the aqueous solution containing nano-Cu particles (the molar ratio of water and TMOS is 1:4, and the mass of Cu accounts for 1% of the gel matrix. 5%), after mixing evenly, adding hydrochloric acid with a molar ratio of 0.01 to TEOS, stirring vigorously, standing to form a gel, aging the gel for 3 hours, washing with 200ml ethanol, three times in total. The gel was then placed in an autoclave with CO 2 As a drying medium, black airgel can be obtained after drying, and its SEM scanning electron microscope picture is shown in image 3 .

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Abstract

The invention relates to a preparation method for a colored silicon oxide aerogel. The preparation method is characterized by comprising the following steps: adding a developing carrier into a silicon oxide sol precursor solution; uniformly stirring the solution and adding a gelation catalyst; and after the gel is aged, drying the gel to obtain the colored silicon oxide aerogel. The preparation method provided by the invention is small in environmental pollution, high in coloring firmness, difficult to elute, easy to control component and small in chemical segregation.

Description

technical field [0001] The invention relates to the field of materials, in particular to a preparation method of colored silica airgel. Background technique [0002] Airgel is a lightweight porous nano-structured material composed of ultrafine particles. Its unique nano-sized particles and nano-pore structure make it have many unique properties. Electrodes, acoustic impedance coupling materials, gas adsorption and separation membranes, high-efficiency catalysts and their supports have broad application prospects. Among them, silica airgel is an inorganic sponge-like porous material with nanopores, which can be used as thermal insulation materials, sound insulation materials, catalyst carriers, etc., and has unique characteristics and broad potential application prospects, but pure silica airgel is usually It is in several states such as white, light blue, transparent, and translucent, and its functionality and color rendering are poor, which limits the application of airgel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/16
Inventor 岳晓华
Owner SICHUAN KENINGTAI TECH CO LTD
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