A method for preparing a deodorant product

Abstract

The application discloses a preparation method of a deodorant product, and comprises the following steps: step one, preparing a cross-linked hydroxypropyl methyl cellulose and chitosan water solution: hydroxypropyl methyl cellulose and chitosan are dispersed in water in a mass ratio of 1:1 to form a uniform and stable water dispersion a; peracetic acid and a copper ion catalyst are added to the water solution a, and the water solution a is heated and treated at 80-100 DEG C for 3-5 hours to obtain a water solution b; glucose is added to the water solution b to remove excess peracetic acid, and the water solution b is heated and treated for 1 hour again; and the cross-linked hydroxypropyl methyl cellulose and chitosan water solution is obtained after cooling; step two, preparing a stable hydrogen peroxide solution: urea is added to a hydrogen peroxide solution, and the solution is stirred at 40-50 DEG C for 1 hour; cyclodextrin is added to the above solution, and the solution is continuously stirred at 40-50 DEG C for 1 hour; and the stable hydrogen peroxide solution is obtained after cooling to room temperature; and step three, preparing the deodorant product: the cross-linked hydroxypropyl methyl cellulose and chitosan water solution obtained in step one and the stable hydrogen peroxide solution obtained in step two are mixed in a ratio of 1:5 to 1:1, and sodium chlorite is added, so that the deodorant product is obtained after stirring.

Description

TECHNICAL FIELD

[0001] The present application relates to a preparation method of a deodorizing product, the deodorizing product prepared by the method has a very high removal effect on odor, peculiar smell and formaldehyde, and is especially suitable for removing odor in indoor, vehicle and garbage station. TECHNICAL BACKGROUND

[0002] There are a large number of unpleasant odors such as leather smell, board smell, tobacco smell, food smell, chemical smell, mold smell, etc. in various environments in which we live, which greatly reduces the comfort of human life. In addition, there is formaldehyde pollution around us, and formaldehyde has been listed as one of the indoor pollutants most harmful to public health. Most of the current deodorizing products are odor masking agents, such as spraying perfume, etc. These products only reduce the unpleasant degree of odor, and do not eliminate the odor source. The main source of odor is the sulfur and nitrogen-containing compounds emitted, and it is urgently needed to combine or oxidize these groups to effectively eradicate the peculiar smell.

[0003] Therefore, it is urgent to develop a deodorizing product, especially a deodorizing product suitable for odor in indoor and vehicle environment. SUMMARY

[0004] In view of the above shortcomings, one object of the present application is to provide a deodorizing product suitable for odor in indoor and vehicle environment.

[0005] To achieve the above object, the present application adopts the following technical scheme:

[0006] A preparation method of a deodorizing product, comprising:

[0007] Step one, preparing a water solution of cross-linked hydroxypropyl methyl cellulose and chitosan:

[0008] According to the mass ratio of 1:1, hydroxypropyl methyl cellulose and chitosan are dispersed in water to form a uniform and stable water dispersion a;

[0009] Peroxyacetic acid and copper ion catalyst are added to the water solution a, and heated at 80-100 degrees Celsius for 3-5 hours to obtain water solution b;

[0010] Glucose is added to the water solution b to remove excess peroxyacetic acid, and then heated for 1 hour, and the cross-linked hydroxypropyl methyl cellulose and chitosan water solution is obtained after cooling;

[0011] Step two, preparing a stable hydrogen peroxide solution:

[0012] adding urea to the aqueous hydrogen peroxide solution, stirring at 40-50 degrees Celsius for 1 hour; then adding cyclodextrin to the above solution and continuously stirring at 40-50 degrees Celsius for 1 hour, and then cooling to room temperature to obtain a stable aqueous hydrogen peroxide solution;

[0013] Step three, preparing the odor-removing product:

[0014] Mixing the cross-linked hydroxypropyl methyl cellulose and the aqueous solution of chitosan obtained in step one and the stable aqueous hydrogen peroxide solution obtained in step two according to a ratio of 1:5 to 1:1, and adding sodium chlorite, and then stirring to obtain the odor-removing product.

[0015] As a preferred aspect, the total mass fraction of hydroxypropyl methyl cellulose and chitosan in the water dispersion a is 0.02% to 2%.

[0016] As a preferred aspect, the effect of adding peracetic acid is that it is used to oxidize a large number of carboxyl groups in hydroxypropyl methyl cellulose and chitosan, and through the polymerization of different intermolecular carboxyl and hydroxyl groups, a cross-linked body is formed; and the acetic acid produced after the decomposition of peracetic acid can accelerate the dissolution of chitosan and further promote the occurrence of cross-linking reaction.

[0017] As a preferred aspect, the mass fraction of peracetic acid added to the aqueous solution a is 0.01% to 1%.

[0018] As a preferred aspect, the copper ion catalyst is copper acetate; and the mass fraction of copper acetate added to the aqueous solution a is 0.0001% to 0.001%.

[0019] As a preferred aspect, the mass fraction of glucose added to the aqueous solution b is 0.005% to 0.5%.

[0020] As a preferred aspect, the mass fraction of hydrogen peroxide in the aqueous hydrogen peroxide solution is 0.05% to 2%.

[0021] As a preferred aspect, the mass fraction of urea added to the aqueous hydrogen peroxide solution is 0.05% to 2%.

[0022] As a preferred aspect, the mass fraction of cyclodextrin added to the aqueous hydrogen peroxide solution is 0.05% to 1%.

[0023] As a preferred aspect, the mass fraction of sodium chlorite added to the odor-removing product is 0.001% to 0.05%.

[0024] The application provides a preparation method of a deodorization product, which has the following advantages: (1) the cross-linked hydroxypropyl methyl cellulose and chitosan can form a dense film layer on the surface of an odor source, and can eliminate sulfur-containing, nitrogen-containing odor sources and formaldehyde; (2) the stable hydrogen peroxide groups are embedded in the cross-linked body, and active oxygen can be gradually released for a long time after use, so that odor sources and formaldehyde and the like can be eliminated; (3) the preparation method is simple, and the scale production can be easily controlled; the product raw materials are widely sourced and low in price. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is the product of Example 1 and the product of Comparative Example 1, which are respectively sprayed in a smelly cat urine cage, a smelly smoking room and a butyric acid room sprayed with smelly odor, and the odor removal effect after 12 hours is compared.

[0026] Figure 2 is the product of Example 1 and the product of Comparative Example 1, which are respectively sprayed in a test cabin with more serious pollution, and the removal effect of formaldehyde, ammonia, benzene and TVOC after 24 hours is compared. EMBODIMENT

[0027] Example 1

[0028] Firstly, 0.5 grams of hydroxypropyl methyl cellulose and 0.5 grams of chitosan are dispersed in 100 milliliters of water to form a uniform and stable aqueous dispersion; then 0.5 grams of peroxoacetic acid and 5 milligrams of copper acetate are added to the above aqueous dispersion, and after stirring, heating is performed to 90 degrees Celsius, and constant temperature stirring treatment is performed for 4 hours; then 0.25 grams of glucose is added to the above solution, and stirring is performed at 90 degrees Celsius for 1 hour, to obtain an aqueous solution of cross-linked hydroxypropyl methyl cellulose and chitosan. Secondly, 1 gram of urea is added to 100 milliliters of a hydrogen peroxide solution with a mass fraction of 1%, and after stirring, heating is performed to 45 degrees Celsius, and constant temperature stirring treatment is performed for 1 hour; then 0.75 grams of cyclodextrin is added to the above solution, and continuous stirring is performed at 45 degrees Celsius for 1 hour, to obtain a stable hydrogen peroxide solution. Finally, 40 grams of the aqueous solution of cross-linked hydroxypropyl methyl cellulose and chitosan is added to 100 grams of the stable hydrogen peroxide solution, and 0.35 grams of sodium chlorite is added, and after stirring for 30 minutes, a deodorization product is obtained. The deodorization product obtained in this example 1 has the following significant advantages: (1) the cross-linked hydroxypropyl methyl cellulose and chitosan can form a dense film layer on the surface of an odor source, and can eliminate sulfur-containing, nitrogen-containing odor sources and formaldehyde; (2) the stable hydrogen peroxide groups are embedded in the cross-linked body, and active oxygen can be gradually released for a long time after use, so that odor sources and formaldehyde and the like can be eliminated; (3) the preparation method is simple, and the scale production can be easily controlled; the product raw materials are widely sourced and low in price. The product of this example is respectively sprayed in a smelly cat urine cage, a smelly smoking room and a butyric acid room sprayed with smelly odor, and detection is performed after 12 hours, as shown in Table 1. Figure 1As shown in the example, the cat urine smell, smoke smell, and butyric acid smell are greatly reduced and basically cannot be smelled, confirming that the product has excellent odor removal function. At the same time, the product of the example is sprayed in a test cabin with more serious pollution, and detection is performed after 24 hours, as shown in the following table: Figure 2 As shown in the example, the removal effects of formaldehyde, ammonia, benzene, and TVOC are very significant, and the values of these indicators are all reduced to 0.1 mg / m 3 Within 1 hour, confirming that the product has excellent air treatment performance. In addition, after the product is used, it can be evenly distributed on the surface of the substrate, such as the surface of glass, cabinets, and walls, and no spots are generated.

[0029] As shown in the example Figure 1 , Figure 2 It can be seen that the product of the example has the following advantages:

[0030] (1) The cross-linked hydroxypropyl methyl cellulose and chitosan can form a dense film layer on the surface of the odor source, and combine to eliminate sulfur-containing, nitrogen-containing odor sources, and formaldehyde;

[0031] (2) The stable hydrogen peroxide group is embedded in the cross-linked body, and active oxygen is gradually released for a long time after use to eliminate odor sources and formaldehyde, etc.

[0032] (3) The preparation method is simple, easy to control scale production, and the product raw materials are widely sourced and low in price.

[0033] Example 2

[0034] First, 0.1 grams of hydroxypropyl methyl cellulose and 0.1 grams of chitosan are dispersed in 100 milliliters of water to form a uniform and stable aqueous dispersion; then 0.1 grams of peroxoacetic acid and 1 milligram of copper acetate are added to the above aqueous dispersion, stirred, and heated to 80 degrees Celsius, and constant temperature stirring is performed for 5 hours; then 0.1 grams of glucose is added to the above solution, and stirring is performed at 80 degrees Celsius for 1 hour to obtain an aqueous solution of cross-linked hydroxypropyl methyl cellulose and chitosan. Second, 0.5 grams of urea is added to 100 milliliters of 0.5% by mass hydrogen peroxide solution, stirred, and heated to 40 degrees Celsius, and constant temperature stirring is performed for 1 hour; then 0.5 grams of cyclodextrin is added to the above solution and continuously stirred at 40 degrees Celsius for 1 hour to obtain a stable hydrogen peroxide solution. Finally, 20 grams of the aqueous solution of cross-linked hydroxypropyl methyl cellulose and chitosan is added to 100 grams of the stable hydrogen peroxide solution, and 0.12 grams of sodium chlorite is added, stirred for 30 minutes, and the odor removal product is obtained. The performance of the product is basically the same as that of Example 1.

[0035] Example 3

[0036] First, 1 gram of hydroxypropyl methylcellulose and 1 gram of chitosan are dispersed in 100 milliliters of water, stirred to form a uniform and stable aqueous dispersion; then 1 gram of peroxoacetic acid and 10 milligrams of copper acetate are added to the above aqueous dispersion, stirred and heated to 100 degrees Celsius, and constant temperature stirring is carried out for 3 hours; then 0.5 grams of glucose are added to the above solution, and stirring is carried out at 100 degrees Celsius for 1 hour, to obtain a cross-linked hydroxypropyl methylcellulose and chitosan aqueous solution. Second, 2 grams of urea are added to 100 milliliters of a 2% by mass hydrogen peroxide solution, stirred and heated to 50 degrees Celsius, and constant temperature stirring is carried out for 1 hour; then 1 gram of cyclodextrin is added to the above solution, and stirring is carried out at 50 degrees Celsius for 1 hour, to obtain a stable hydrogen peroxide solution. Finally, 100 grams of the cross-linked hydroxypropyl methylcellulose and chitosan aqueous solution are added to 100 grams of the stable hydrogen peroxide solution, and 1 gram of sodium chlorite is added, and stirring is carried out for 30 minutes, to obtain a deodorizing product. The performance of the product is basically the same as that of Example 1.

[0037] Example 4

[0038] First, 0.8 grams of hydroxypropyl methylcellulose and 0.8 grams of chitosan are dispersed in 100 milliliters of water, stirred to form a uniform and stable aqueous dispersion; then 0.8 grams of peroxoacetic acid and 8 milligrams of copper acetate are added to the above aqueous dispersion, stirred and heated to 90 degrees Celsius, and constant temperature stirring is carried out for 5 hours; then 0.4 grams of glucose are added to the above solution, and stirring is carried out at 90 degrees Celsius for 1 hour, to obtain a cross-linked hydroxypropyl methylcellulose and chitosan aqueous solution. Second, 1.2 grams of urea are added to 100 milliliters of a 1.2% by mass hydrogen peroxide solution, stirred and heated to 45 degrees Celsius, and constant temperature stirring is carried out for 1 hour; then 0.8 grams of cyclodextrin are added to the above solution, and stirring is carried out at 45 degrees Celsius for 1 hour, to obtain a stable hydrogen peroxide solution. Finally, 60 grams of the cross-linked hydroxypropyl methylcellulose and chitosan aqueous solution are added to 100 grams of the stable hydrogen peroxide solution, and 0.45 grams of sodium chlorite are added, and stirring is carried out for 30 minutes, to obtain a deodorizing product. The performance of the product is basically the same as that of Example 1.

[0039] Comparative Example 1

[0040] First, 0.5 grams of hydroxypropyl methylcellulose and 0.5 grams of chitosan are dispersed in 100 milliliters of water, and then 0.5 grams of peroxoacetic acid, 5 milligrams of copper acetate, and 0.5 grams of glucose are added, and after stirring, a suspension of hydroxypropyl methylcellulose and chitosan is obtained. Second, 1 gram of urea is added to 100 milliliters of a 1% by mass hydrogen peroxide solution, and then 0.75 grams of cyclodextrin is added, and after stirring, a hydrogen peroxide solution is obtained. Finally, 40 grams of the above-mentioned suspension of hydroxypropyl methylcellulose and chitosan is added to 100 grams of the above-mentioned hydrogen peroxide solution, and 0.35 grams of sodium chlorite is added, and after stirring for 30 minutes, a comparative product is obtained. The comparative product is sprayed into a cage with a foul cat urine smell, a smoky room, and a room with a foul butyric acid smell, respectively, and after 12 hours, detection is performed, as shown in Comparative Example 1 in Table 1. Figure 1 As shown in the comparative example in Table 1, although the cat urine smell, the smoke smell, and the butyric acid smell are reduced to some extent, the heavier smells can still be smelled, indicating that the odor removal function of the comparative product is general. At the same time, the comparative product is sprayed into a test cabin with more serious pollution, and after 24 hours, detection is performed, as shown in Comparative Example 2 in Table 1. Figure 2 As shown in the comparative example in Table 1, although the values of formaldehyde, ammonia, benzene, and TVOC detected are reduced to some extent, these pollution indicators are still over the standard, confirming that the air treatment performance of the comparative product is general. In addition, after use of the comparative product, because it contains a suspension, it cannot be uniformly distributed on the surface of the substrate, such as glass, cabinets, and walls, and more spots will be generated, and the experience after use is poor.

[0041] It is to be understood that the above description is intended to be illustrative and not restrictive. Many embodiments and many applications besides the examples provided herein will be apparent to those of skill in the art upon reading the above description. The scope of the technology should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are incorporated by reference for all purposes. The omission of any aspect of the subject matter disclosed herein does not preclude coverage of such aspect, nor does it surrender, disclaim, compromise, alienate, or render a disclaimer of any aspect of the subject matter disclosed herein.

Claims

1. A method for preparing an odor-removing product, characterized in that, include: Step 1: Prepare an aqueous solution of cross-linked hydroxypropyl methylcellulose and chitosan: Hydroxypropyl methylcellulose and chitosan were dispersed in water at a mass ratio of 1:1 and stirred to form a uniform and stable aqueous dispersion a; Peracetic acid and a copper ion catalyst were added to the aqueous solution a, and the solution was heated at 80°C to 100°C for 3 to 5 hours to obtain aqueous solution b. Glucose was added to the aqueous solution b to remove excess peracetic acid, followed by heating for 1 hour. After cooling, a cross-linked aqueous solution of hydroxypropyl methylcellulose and chitosan was obtained. Step 2: Prepare a stable hydrogen peroxide solution: Add urea to the hydrogen peroxide aqueous solution and stir at 40-50 degrees Celsius for 1 hour; then add cyclodextrin to the above solution and continue stirring at 40-50 degrees Celsius for 1 hour, then cool to room temperature to obtain a stable hydrogen peroxide aqueous solution. Step 3: Prepare the deodorizing product: The cross-linked hydroxypropyl methylcellulose obtained in step one is mixed with an aqueous solution of chitosan and a stable hydrogen peroxide solution obtained in step two in a ratio of 1:5 to 1:

1. Sodium chlorite is added and stirred to obtain the deodorizing product.

2. The method for preparing a deodorizing product as described in claim 1, characterized in that: In the aqueous dispersion a, the total mass fraction of hydroxypropyl methylcellulose and chitosan is 0.2% to 0.2%.

3. The method for preparing a deodorizing product as described in claim 1, characterized in that: The purpose of adding peracetic acid is twofold: first, its oxidizing properties oxidize hydroxypropyl methylcellulose and chitosan to generate a large number of carboxyl groups, which then polymerize with hydroxyl groups to form cross-linked molecules; second, the acetic acid produced after the decomposition of peracetic acid can accelerate the dissolution of chitosan and further promote the cross-linking reaction.

4. The method for preparing a deodorizing product as described in claim 1, characterized in that: The mass fraction of peracetic acid added to aqueous solution a is from one-thousandth to one-hundredth.

5. The method for preparing a deodorizing product as described in claim 1, characterized in that: The copper ion catalyst is copper acetate; the mass fraction of the copper acetate added to the aqueous solution a is from one part per hundred thousand to one part per ten thousand.

6. The method for preparing a deodorizing product as described in claim 1, characterized in that: The glucose added to aqueous solution b has a mass fraction of 0.05% to 0.5%.

7. The method for preparing a deodorizing product as described in claim 1, characterized in that: The hydrogen peroxide solution contains a hydrogen peroxide mass fraction of 0.5% to 0.2%.

8. The method for preparing a deodorizing product as described in claim 1, characterized in that: The mass fraction of urea added to the hydrogen peroxide aqueous solution is from 0.5% to 0.2%.

9. The method for preparing a deodorizing product as described in claim 1, characterized in that: The mass fraction of the cyclodextrin added to the hydrogen peroxide aqueous solution is from 0.5% to 1%.

10. The method for preparing a deodorizing product as described in claim 1, characterized in that: The sodium chlorite added to the deodorizing product is at a mass fraction of 1 to 5 per thousand.

Images