Multi-stage humidity indicating silicone gel and preparation method thereof

A silica gel, multi-stage technology, applied in chemical instruments and methods, material analysis by observing the influence on chemical indicators, silicon compounds, etc., can solve the environmental pollution of humidity indicators, complex preparation process, color sensitivity Low-level problems, to achieve the effect of convenient application, simple preparation process, and high color sensitivity

Pending Publication Date: 2018-12-21
山东辛化硅胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a multi-stage humidity indicator silicone gel and its preparation method, aiming to solve the problems of existing humidity indicators such as environmental pollution, human safety hazards, complex preparation process and low color sensitivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In the embodiment of the present invention, the first solution and the second solution with a volume of 1 L are configured respectively, wherein the first solution is composed of the following raw materials in mass percentage: 3% sulfuric acid, 2% sodium lauryl sulfonate, and the rest is water The second solution is made up of the following raw materials in mass percentage: methyl red 0.004%, methyl blue 0.002%, 3-3-bis(p-dimethylaminophenyl)phthalide 0.05%, phosphite 0.05%, the rest is water;

[0025] After absorbing moisture, the inorganic silica gel is immersed in the first solution, soaked for 5 hours at a temperature of 30°C, and then taken out; the inorganic silica gel soaked in the first solution is immersed in the second solution, and soaked for 5 hours at a temperature of 35°C. After one hour, take it out, and place it in a drying temperature of 90° C. for drying treatment to obtain the final product.

Embodiment 2

[0027] In the embodiment of the present invention, a first solution and a second solution with a volume of 1 L are configured respectively, wherein the first solution is composed of the following raw materials in mass percentage: 10% hydrochloric acid, 5% sodium lauryl sulfonate, and the rest is water ; The second solution is made up of the following raw materials in mass percentage: 0.005% of methylene blue, 0.004% of ethoxypyrroline, 0.006% of methylene blue, 0.3% of 3-3-bis (p-dimethylaminophenyl) phthalide , phosphite 0.3%, the rest is water;

[0028] After absorbing moisture, the inorganic silica gel is immersed in the first solution, soaked for 7 hours at a temperature of 35°C, and then taken out; the inorganic silica gel soaked in the first solution is immersed in the second solution, and soaked for 3 hours at a temperature of 30°C. After one hour, take it out, and place it in a drying temperature of 70°C for drying treatment to obtain the final product.

Embodiment 3

[0030] In the embodiment of the present invention, the first solution and the second solution with a volume of 1 L are configured respectively, wherein the first solution is composed of the following raw materials in mass percentage: 5% nitric acid, 3% sodium lauryl sulfonate, and the rest is water The second solution is composed of the following raw materials in mass percentage: 0.004% of methyl violet, 0.005% of methyl orange, 0.1% of 3-3-bis(p-dimethylaminophenyl)phthalide, 0.1% of phosphite, the rest is water;

[0031] Immerse the inorganic silica gel in the first solution after absorbing moisture, and soak it for 8 hours at a temperature of 40°C, then take it out; immerse the inorganic silica gel soaked in the first solution in the second solution, and soak it for 2 hours at a temperature of 35°C After one hour, take it out, and place it in a drying temperature of 120° C. for drying treatment to obtain the final product.

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Abstract

The invention is suitable for the technical field of chemical industry, and provides multi-stage humidity indicating silicone gel and a preparation method thereof. The preparation method of the humidity indicating silicone gel comprises the following steps: carrying out moisture absorption on inorganic silica gel, putting the inorganic silica gel into a first solution containing sodium lauryl sulfate and acidic solution components, soaking for 5 to 8 hours and then taking out; immersing into a second solution containing a mixed indicator, 3-3-bis(p-dimethylaminophenyl)phthalide and a phosphitecomponent, and soaking for 2 to 5 hours; putting a soaked substance at the drying temperature of 70 to 150 DEG C and carrying out drying treatment. The prepared multi-stage humidity indicating silicone gel does not contain metal ions such as cobalt, copper and iron, so that the problems of environmental pollution and human health hazards are solved from the source; in addition, the humidity indicating silicone gel has the advantages of high coloration sensitivity, convenience in use and capability of being reused for multiple times; a preparation technology of the multi-stage humidity indicating silicone gel is simple and easily realizes large-scale production; in addition, the appearance of the multi-stage humidity indicating silicone gel is dark blue which is in line with aesthetics ofa majority of users.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a multi-stage humidity indicating silicone gel and a preparation method thereof. Background technique [0002] Humidity indicators are mainly used in the air separation industry, catalyst carrier industry, precision instrument industry, etc. With the rapid development of the industry, the requirements for products are becoming more and more stringent, environmentally friendly and healthy. [0003] At present, the well-known humidity indicators are formed by impregnating different concentrations of cobalt dichloride solutions or various heavy metal salt solutions into various carriers. However, cobalt dichloride is a carcinogen, and heavy metal ions such as copper and iron ions etc. have huge risks and harm to the environment, especially water resources and the human body; in addition, the humidity indicator products currently on the market generally have com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/157G01N21/78
CPCG01N21/78C01B33/157
Inventor 仇兴亚张新文魏晓童黄江美
Owner 山东辛化硅胶有限公司
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