Preparation method of photocatalyst synergistic slow-release type deodorizing gel

Abstract

The invention discloses a preparation method of photocatalyst synergistic slow-release type deodorizing gel, and belongs to the technical field of air purification materials. The air purification effect is achieved through the synergistic effect of a photocatalyst, an antibacterial and mildew-proof component and a slow-release structure, and specifically, the preparation method comprises the steps that firstly, a Beishi photocatalyst formaldehyde removal solution, activated carbon and a gel are added into a reaction kettle to be subjected to a hydrothermal reaction, and a solution A is obtained; then adding a surfactant, antibacterial, mildew-proof and formaldehyde-removing powder HNF-001 and a synergist into the solution A, and stirring while keeping the temperature to obtain a solution B; and finally, stopping heating, continuously stirring, adding a humectant into the solution B, and canning to obtain the photocatalyst synergistic slow-release odor removal gel. According to the invention, through the synergistic matching of the Meishi photocatalyst formaldehyde removal liquid, the antibacterial mildew-proof formaldehyde removal powder HNF-001 and the synergist, and in combination with the slow-release gel structure and the diversion design, the multiple effects of formaldehyde decomposition, antibacterial mildew-proof and peculiar smell absorption and decomposition are integrated. And the air purifier has long-acting slow release and environmental adaptability, and is suitable for air purification of home and vehicle-mounted scenes.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification materials, and in particular to a preparation method of a photocatalyst synergistic slow-release deodorant gel. Background Art

[0002] With the progress of technology and the improvement of people's living standards, people's awareness of air safety is getting higher and higher. Air is not only a necessary condition for human survival but also an important medium for the spread of diseases. In daily life, a suitable temperature and humidity environment is a hotbed for the growth of microorganisms, which is likely to produce various unpleasant odors. Therefore, air purification is of great significance for people's happy life.

[0003] Traditional deodorant gels have the following defects:

[0004] (1) Single function: Most products rely on a single active ingredient (such as activated carbon or fragrance), and cannot solve the problems of formaldehyde, microbial growth, and complex odors at the same time.

[0005] (2) Uncontrollable release: The gel matrix is greatly affected by environmental temperature and humidity, resulting in rapid volatilization of active ingredients or caking and inactivation.

[0006] (3) Insufficient synergy: The existing technology lacks the composite design of photocatalyst and antibacterial agent, and it is difficult to achieve long-term purification. Summary of the Invention

[0007] The purpose of the present invention is to provide a preparation method of a photocatalyst synergistic slow-release deodorant gel to solve the problems in the background art.

[0008] To achieve the above purpose, the present invention provides a preparation method of a photocatalyst synergistic slow-release deodorant gel, which specifically includes the following steps:

[0009] (1) Add Ledderstedt photocatalyst formaldehyde removal liquid, activated carbon, and gelling agent into a reaction kettle for hydrothermal reaction to obtain solution A;

[0010] (2) Add a surfactant, antibacterial and mildew-proof formaldehyde removal powder HNF-001, and synergist to solution A, keep warm and stir to obtain solution B;

[0011] (3) Turn off the heating and continue stirring, add a moisturizer to solution B, and can to obtain a photocatalyst synergistic slow-release deodorant gel.

[0012] Preferably, in step (1), the gelling agent is one or more of carbomer, pectin, gelatin, chitin, chitosan, and hydroxypropyl methylcellulose.

[0013] Preferably, in step (1), the ratio of the gelling agent, activated carbon and Laishide photocatalyst formaldehyde removal liquid is 1.0-2.0 g: 1.0-2.0 g: 100 mL.

[0014] Preferably, in step (1), the temperature of the hydrothermal reaction is 90-92 °C, and the time of the hydrothermal reaction is 20-30 min.

[0015] Preferably, in step (2), the surfactant is one or more of PVP, SDS, PEG, CTAB; the synergist is one or more of phytoncidere, persimmon tannin, zinc ricinoleate.

[0016] Preferably, the ratio of the surfactant, antibacterial and mildew-proof formaldehyde removal powder HNF-001, synergist in step (2) to the Laishide photocatalyst formaldehyde removal liquid in step (1) is 0.1-0.5 g: 0.5-1.0 g: 0.5-1.0 g: 100 mL.

[0017] Preferably, in step (2), the heat preservation and stirring time is 10-20 min.

[0018] Preferably, in step (3), the humectant is one or more of glycerol, butanediol, sorbitol.

[0019] Preferably, the ratio of the humectant in step (3) to the Laishide photocatalyst formaldehyde removal liquid in step (1) is 0.5 g-1.0 g: 100 mL.

[0020] Preferably, in step (3), the canning temperature is 65-70 °C.

[0021] Therefore, the preparation method of the photocatalyst synergistic slow-release deodorizing gel provided by the present invention has the following beneficial effects compared with the traditional deodorizing gel:

[0022] (1) The present invention solves the problem that bacteria and molds are easily generated during the use of traditional deodorizing gels by adding antibacterial and mildew-proof formaldehyde removal powder HNF-001, and improves the use safety;

[0023] (2) The present invention actively adsorbs and decomposes the harmful gas components in the air through the adsorption of activated carbon and the decomposition of Laishide photocatalyst formaldehyde removal liquid, antibacterial and mildew-proof formaldehyde removal powder HNF-001 and synergist, and solves the problem of purification saturation of traditional gels;

[0024] (3) The present invention achieves a rapid formaldehyde removal and deodorization effect through the volatilization and decomposition of Laishide photocatalyst formaldehyde removal liquid and synergist, and then achieves a long-term purification effect through the adsorption of activated carbon and the decomposition of antibacterial and mildew-proof formaldehyde removal powder HNF-001;

[0025] (4) The preparation process of the present invention is simple, the raw materials are rich in sources, and it has excellent application prospects;

[0026] (5) The present invention is convenient to use and is applicable to air purification in home and vehicle-mounted scenarios.

[0027] The technical solution of the present invention will be further described in detail below with reference to the drawings and embodiments. Description of the Drawings

[0028] Figure 1 is a process schematic diagram for preparing the photocatalyst synergistic sustained-release deodorant gel of the present invention;

[0029] Figure 2 is a product diagram of the photocatalyst synergistic sustained-release deodorant gel prepared in Example 1 of the present invention. Detailed Embodiments

[0030] The technical solution of the present invention will be further described below with reference to the drawings and embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and shall be included in the protection scope of the present invention. In addition, it should be understood that after reading the content of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application and belong to the protection scope of the present invention.

[0031] Referring to "embodiments" herein means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The term "embodiment" that appears in various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0032] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the technical field to which the present application belongs; the use of the relevant terms herein is only for describing specific embodiments and is not intended to limit the present application.

[0033] Unless otherwise specified in the present invention, the reagents, instruments, equipment, etc. used are the reagents, instruments, and equipment commonly used by those skilled in the art in this field.

[0034] The Leishide photocatalytic formaldehyde-removing liquid used in the following examples is the final product obtained from the invention patent with the patent number 202410952828.0 and the patent title "A Preparation Method of a Multielement Co-Doped Nano-Zinc Oxide Antibacterial Sol", which was applied for by our company (Jiangxi Hongna New Material Technology Co., Ltd.) on July 16, 2024.

[0035] The antibacterial, mildew-proof and formaldehyde-removing powder HNF-001 is the final product obtained from the invention patent with the application number 202410270773.5 and the patent title "A Preparation Method of a Multifunctional Titanium Dioxide-Based Nano-Composite Antibacterial Powder", which was applied for by our company (Jiangxi Hongna New Material Technology Co., Ltd.) on June 4, 2024.

[0036] The preparation of these two substances will not be elaborated here.

[0037] Example 1

[0038] This example provides a preparation method of a photocatalyst-assisted slow-release deodorant gel, as Figure 1 shown, specifically including the following steps:

[0039] (1) Add 100 mL of Leishide photocatalytic formaldehyde-removing liquid, 1.0 g of activated carbon, and 1.0 g of carbomer 941 into the reaction kettle, and carry out hydrothermal reaction at 90 °C for 30 min to obtain solution A.

[0040] (2) Add 0.1 g of PEG, 0.5 g of antibacterial, mildew-proof and formaldehyde-removing powder HNF-001, and 0.5 g of phytoncidere into solution A, and stir at a constant temperature for 20 min to obtain solution B.

[0041] (3) Turn off the heating and continue stirring. Add 0.5 g of glycerol into solution B, and carry out canning when the temperature reaches 70 °C to obtain the photocatalyst-assisted slow-release deodorant gel.

[0042] The product diagram of the photocatalyst-assisted slow-release deodorant gel prepared in this example is as Figure 2 shown.

[0043] Example 2

[0044] This example provides a preparation method of a photocatalyst-assisted slow-release deodorant gel, specifically including the following steps:

[0045] (1) Add 100 mL of Leishide photocatalytic formaldehyde-removing liquid, 1.5 g of activated carbon, and 1.5 g of chitosan into the reaction kettle, and carry out hydrothermal reaction at 91 °C for 25 min to obtain solution A.

[0046] (2) Add 0.3 g of PVP, 0.8 g of antibacterial, mildew-proof and formaldehyde-removing powder HNF-001, and 0.8 g of persimmon tannin into solution A, and stir at a constant temperature for 15 min to obtain solution B.

[0047] (3) Turn off the heating and continue stirring. Add 0.8 g of butanediol to Solution B. When the temperature reaches 67 °C, can it to obtain the photocatalyst synergistic slow-release deodorant gel.

[0048] Example 3

[0049] This example provides a preparation method of a photocatalyst synergistic slow-release deodorant gel, which specifically includes the following steps:

[0050] (1) Add 100 mL of Leishide photocatalyst formaldehyde removal liquid, 2.0 g of activated carbon, and 2.0 g of hypromellose into the reaction kettle, and carry out hydrothermal reaction at 92 °C for 20 min to obtain Solution A.

[0051] (2) Add 0.5 g of CTAB, 1.0 g of antibacterial and mildew-proof formaldehyde removal powder HNF-001, and 1.0 g of zinc ricinoleate alkyd to Solution A, keep warm and stir for 10 min to obtain Solution B.

[0052] (3) Turn off the heating and continue stirring. Add 1.0 g of sorbitol to Solution B. When the temperature reaches 65 °C, can it to obtain the photocatalyst synergistic slow-release deodorant gel.

[0053] Comparative Example 1

[0054] Compared with Example 1, the difference in this comparative example is only that activated carbon is not added in step (1), and the rest are the same as those in Example 1, so they will not be repeated here.

[0055] Comparative Example 2

[0056] Compared with Example 1, the difference in this comparative example is only that the surfactant PEG is not added in step (2), and the rest are the same as those in Example 1, so they will not be repeated here.

[0057] Comparative Example 3

[0058] Compared with Example 1, the difference in this comparative example is only that the antibacterial and mildew-proof formaldehyde removal powder HNF-001 is not added in step (2), and the rest are the same as those in Example 1, so they will not be repeated here.

[0059] Comparative Example 4

[0060] Compared with Example 1, the difference in this comparative example is only that phenol is not added in step (2), and the rest are the same as those in Example 1, so they will not be repeated here.

[0061] Test Example 1

[0062] Perform antibacterial performance tests on the deodorant gels prepared in Examples 1-3 and Comparative Examples 1-4 respectively, including the following steps:

[0063] Weigh 10 mg of the photocatalyst-assisted slow-release deodorizing gels prepared in Examples 1-3 and Comparative Examples 1-4, and the commercially available similar products, and disinfect them with an ultraviolet sterilization lamp in a laminar flow cabinet for 40 min. Dilute the bacterial liquid cultured for 8 h by three orders of magnitude, add the disinfected multifunctional zinc oxide-based nano-composite antibacterial powder, and place it in a shaker at a temperature of 37 °C and a rotation speed of 100 rpm for 4 h. Pipette 50 μL of the shaken bacterial liquid, inoculate it on a culture dish, and place it in a constant temperature and humidity incubator at a temperature of 37 °C and a relative humidity of 90% for 24 h, and then perform viable count. The results are shown in Table 1.

[0064] Table 1

[0065]

[0066]

[0067] As can be seen from Table 1, the photocatalyst-assisted slow-release deodorizing gel of the present invention has excellent antibacterial properties, and the bactericidal rates against Escherichia coli and Staphylococcus aureus can both reach 100%.

[0068] Test Example 2

[0069] Conduct formaldehyde degradation experiments on the deodorizing gels prepared in Examples 1-3 and Comparative Examples 1-4 respectively, including the following steps:

[0070] Add 150 g of the photocatalyst-assisted slow-release deodorizing gels prepared in Examples 1-3 and Comparative Examples 1-4, and the commercially available similar products, to a photocatalytic device (with a volume of 1 L and a light source of a 40 W fluorescent lamp) to degrade formaldehyde to evaluate the photocatalytic activity of the samples. Use formaldehyde gas (with an initial mass concentration controlled at 0.1 mg / L) as the simulated pollutant. After reacting for 100 min, under the condition of a wavelength of 450 nm, detect the formaldehyde concentration after the reaction to evaluate the photocatalytic activity of the samples under visible light irradiation. The results are shown in Table 2.

[0071] Formaldehyde degradation rate (%) = (Initial mass concentration of formaldehyde - Mass concentration of formaldehyde after 100 min) / Initial mass concentration of formaldehyde × 100%.

[0072] Table 2

[0073]

[0074]

[0075] As can be seen from Table 2, the photocatalyst-assisted slow-release deodorizing gels prepared in Examples 1-3 of the present invention have good formaldehyde degradation effects.

[0076] Test Example 3

[0077] An odor degradation experiment was conducted on the deodorizing gels prepared in Examples 1-3 and Comparative Examples 1-4 respectively, including the following steps:

[0078] Ammonia and hydrogen sulfide were used to simulate odors. 150 g of the photocatalyst co-sustained release deodorizing gels prepared in Examples 1-3, Comparative Examples 1-4 and commercially available similar products were added to a photocatalytic device (with a volume of 1 L and a 40 W fluorescent lamp as the light source) to degrade ammonia and hydrogen sulfide respectively to evaluate the photocatalytic activity of the samples. Using ammonia / hydrogen sulfide gas (with the initial mass concentration controlled at 0.1 mg / L) as the simulated pollutant, after reacting for 100 min, under the condition of a wavelength of 450 nm, the ammonia / hydrogen sulfide concentration after the reaction was detected to evaluate the photocatalytic activity of the samples under visible light irradiation. The results are shown in Table 3.

[0079] Ammonia degradation rate (%) = (Initial mass concentration of ammonia - Mass concentration of ammonia after 100 min) / Initial mass concentration of ammonia × 100%.

[0080] Hydrogen sulfide degradation rate (%) = (Initial mass concentration of hydrogen sulfide - Mass concentration of hydrogen sulfide after 100 min) / Initial mass concentration of hydrogen sulfide × 100%.

[0081] Table 3

[0082] Group Ammonia degradation rate (%) Hydrogen sulfide degradation rate (%) Example 1 99.10 98.21 Example 2 99.31 99.17 Example 3 99.65 99.62 Comparative Example 1 91.54 93.21 Comparative Example 2 92.21 93.89 Comparative Example 3 90.19 90.01 Comparative Example 4 91.09 90.23 Commercially available similar products 90.08 90.01

[0083] As can be seen from Table 3, the photocatalyst co-sustained release deodorizing gels prepared in Examples 1-3 of the present invention have good ammonia and hydrogen sulfide degradation effects.

[0084] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A preparation method of a photocatalyst-assisted slow-release deodorant gel, characterized in that, Specifically, it includes the following steps: (1) Add Leishide photocatalyst formaldehyde removal liquid, activated carbon, and gelling agent into a reaction kettle for hydrothermal reaction to obtain solution A; (2) Add surfactant, antibacterial and mildew-proof formaldehyde removal powder HNF-001, and synergist into solution A, keep warm and stir to obtain solution B; (3) Turn off heating and continue stirring, add humectant into solution B, and can it to obtain a photocatalyst synergistic slow-release deodorant gel.

2. The preparation method of a photocatalyst synergistic slow-release deodorant gel according to claim 1, characterized in that: In step (1), the gelling agent is one or more of carbomer, pectin, gelatin, chitin, chitosan, and hydroxypropyl methylcellulose.

3. The preparation method of a photocatalyst-assisted slow-release deodorant gel according to claim 1, characterized in that: In step (1), the ratio of the gelling agent, activated carbon to Leishide photocatalyst formaldehyde removal liquid is 1.0-2.0 g: 1.0-2.0 g: 100 mL.

4. The preparation method of a photocatalyst synergistic slow-release deodorant gel according to claim 1, characterized in that: In step (1), the temperature of the hydrothermal reaction is 90-92 °C, and the time of the hydrothermal reaction is 20-30 min.

5. The preparation method of a photocatalyst synergistic slow-release deodorant gel according to claim 1, characterized in that: In step (2), the surfactant is one or more of PVP, SDS, PEG, and CTAB; the synergist is one or more of phytoncidere, persimmon tannin, and zinc ricinoleate.

6. The preparation method of a photocatalyst synergistic slow-release deodorant gel according to claim 1, characterized in that: In step (2), the ratio of the surfactant, antibacterial and mildew-proof formaldehyde removal powder HNF-001, synergist to the Leishide photocatalyst formaldehyde removal liquid in step (1) is 0.1-0.5 g: 0.5-1.0 g: 0.5-1.0 g: 100 mL.

7. The preparation method of a photocatalyst-assisted slow-release deodorant gel according to claim 1, characterized in that: In step (2), the time of keeping warm and stirring is 10-20 min.

8. The preparation method of a photocatalyst synergistic slow-release deodorant gel according to claim 1, characterized in that: In step (3), the humectant is one or more of glycerol, butanediol, and sorbitol.

9. The preparation method of a photocatalyst synergistic slow-release deodorant gel according to claim 1, characterized in that: In step (3), the ratio of the humectant to the Leishide photocatalyst formaldehyde removal liquid in step (1) is 0.5 g-1.0 g: 100 mL.

10. The preparation method of a photocatalyst synergistic slow-release deodorant gel according to claim 1, characterized in that: In step (3), the canning temperature is 65-70 °C.

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