Odor-removing formaldehyde-removing paint as well as preparation method and application thereof
A technology of deodorization and hydrothermal reaction, applied in separation methods, chemical instruments and methods, catalysts for physical/chemical processes, etc., can solve problems such as secondary pollution, and achieve the effect of preventing secondary pollution and excellent air purification function
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Embodiment 1
[0029] The preparation steps of the odor-removing aldehyde paint are as follows:
[0030] (1) Dissolve 1.5g of chitosan in 125mL of 9% acetic acid solution, stir and react for 1h, add a mixture powder consisting of 1.5g of coconut shell charcoal and 1.5g of diatomaceous earth, continue to stir for 1h, and filter the obtained solid Washing with deionized water until the pH value of the collected eluent is close to 7, and drying the washed solid at 110°C to prepare a carboxylated chitosan composite carrier;
[0031] (2) adding the carboxylated chitosan composite carrier prepared in step (1) into 20 ml of acetic acid solution with a mass concentration of 5%, then slowly dripping 8 ml of a copper salt solution with a molar concentration of 50 mmol / L and stirring evenly , continue stirring, add 2 ml of ascorbic acid solution with a mass concentration of 10%, adjust the pH value to 6.5 with dilute ammonia water, and hydrothermally react the resulting mixture at 200 ° C for 2 h, afte...
Embodiment 2
[0036] The odor-removing aldehyde paint prepared in Example 1 was made into a coating and then tested for performance; wherein, the preparation of the odor-removing aldehyde coating was prepared by the method provided in GB / T1727-1992, and the specific steps were as follows: The tinplate sheet conforming to the GB / T2520-2017 specification is cut into a test plate with a size of 50mm × 120mm × 0.3mm, and the test plate is cleaned according to the provisions of GB9271-1988 for the test plate. Put the odor-removing formaldehyde paint on the tinplate test plate with a scraper, and finally stand and cure for 2 days at a temperature of 23°C and a relative humidity of 50% to test its formaldehyde purification effect in the actual environment:
[0037] Place the tinplate test panel coated with deodorant and formaldehyde-removing paint at room temperature of 20±2℃, relative humidity of 80%, and low formaldehyde concentration of 2±0.5mg / m2 3 The purification test was carried out in a si...
Embodiment 3
[0040] The odor-removing aldehyde paint prepared in Example 1 was made into a coating and then tested for performance; wherein, the preparation of the odor-removing aldehyde coating was prepared by the method provided in GB / T1727-1992, and the specific steps were as follows: The tinplate sheet that meets the GB / T2520-2017 specification is cut into a test plate with a size of 50mm × 120mm × 0.3mm, and the test plate is cleaned according to the provisions of GB9271-1988 for the test plate. Put the odor-removing formaldehyde paint on the tinplate test plate with a scraper, and finally stand and cure for 2 days at a temperature of 23°C and a relative humidity of 50% to test its formaldehyde purification effect in the actual environment:
[0041] Place the tinplate test plate coated with odor-removing aldehyde paint at room temperature of 20±2℃, relative humidity of 80%, and low toluene concentration of 2±0.5mg / m2 3 The purification test was carried out in a simulated cabin (30cm×2...
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