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
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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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