| abstract |
The invention discloses a preparation method of formaldehyde-removing color-changing gel, which comprises the following steps: s1, weighing the raw materials according to the weight ratio, and placing the raw materials at a specified position for preparation; s2, adding tea polyphenol into deionized water, placing the mixture into a stirring kettle at the temperature of 50-70 ℃, uniformly stirring and mixing, and cooling to obtain a mixed solution; s3, placing the nano photocatalyst and hydroxylamine phosphate into a stirring tank, stirring for 1-3h, and uniformly mixing to obtain mixed powder; s4, adding the mixed powder, the preservative, the antibacterial agent and the peppermint oil into the mixed solution, controlling the temperature to be 30-50 ℃, and uniformly stirring and mixing to obtain a pretreatment solution; s5, placing the pretreatment liquid and the gel powder into a heating tank with the temperature of 100-. |