Preparation method of deodorizing type flexible polyurethane foam containing long-acting and slow-release plant essential oil
A plant essential oil and soft foam technology, which is applied in the field of preparation of deodorant long-acting slow-release plant essential oil polyurethane soft foam, can solve the problems of no deodorant performance and achieve the effect that it is not easy to fall off
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[0026] Such as figure 1 As shown, a method for preparing a deodorant long-acting slow-release plant essential oil polyurethane flexible foam, the preparation method includes the following steps:
[0027] (1) The halloysite nanotubes are immersed in dilute hydrochloric acid with a temperature of 25 to 80°C and a mass fraction of 5 to 20% for 30 to 60 minutes, followed by filtration, washing and drying to obtain activated halloysite nanotubes 1 ;
[0028] (2) Under the protection of inert gas, dissolve cyclodextrin in the solvent according to the weight ratio of cyclodextrin to solvent 1:5~1:10 to obtain a cyclodextrin solution; and then add step ( 1) The obtained activated halloysite nanotubes, the weight ratio of activated halloysite nanotubes to cyclodextrin is 1:3~1:10, and the mixture is evenly mixed to obtain solution a; then isocyanate and cyclodextrin are added to solution a The weight ratio of isocyanate to isocyanate is 1:1~1:5, and the mixture is evenly mixed to obtain s...
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[0041] Example 1
[0042] A method for preparing deodorant long-acting slow-release plant essential oil polyurethane flexible foam, the preparation method comprising the following steps:
[0043] (1) The halloysite nanotubes are immersed in dilute hydrochloric acid with a temperature of 25°C and a mass fraction of 20% for 60 minutes, followed by filtration, washing, and drying to obtain activated halloysite nanotubes 1;
[0044] (2) Under the protection of nitrogen, according to the weight ratio of β-cyclodextrin to dimethyl sulfoxide of 1:5, dissolve β-cyclodextrin in dimethyl sulfoxide to obtain β-cyclodextrin solution; Add the activated halloysite nanotubes 1 obtained in step (1) to the β-cyclodextrin solution, the weight ratio of activated halloysite nanotubes to β-cyclodextrin is 1:10, and mix uniformly to obtain solution a; Add 2,4-toluene diisocyanate to solution a, the weight ratio of β-cyclodextrin to 2,4-toluene diisocyanate is 1:1, mix well to obtain solution b; heat solu...
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[0054] Example 2
[0055] A method for preparing deodorant long-acting slow-release plant essential oil polyurethane flexible foam, the preparation method comprising the following steps:
[0056] (1) The halloysite nanotubes are immersed in dilute hydrochloric acid with a temperature of 80°C and a mass fraction of 5% for 30 minutes, followed by filtration, washing, and drying to obtain activated halloysite nanotubes 1;
[0057] (2) Under the protection of argon, according to the weight ratio of hydroxypropyl β-cyclodextrin to dimethyl sulfoxide 1:10, dissolve hydroxypropyl β-cyclodextrin in dimethyl sulfoxide to obtain hydroxyl Propyl β-cyclodextrin solution; then add the activated halloysite nanotubes 1 obtained in step (1) to the hydroxypropyl β-cyclodextrin solution, activated halloysite nanotubes and hydroxypropyl β-cyclodextrin The weight ratio of the refined is 1:3, and the mixture is evenly mixed to obtain solution a; then 4,4-diphenylmethane diisocyanate, hydroxypropyl β-cyc...
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