Preparation method of photocatalyst synergistic slow-release deodorant gel

Abstract

The application discloses a preparation method of a photocatalyst synergistic slow-release odor-removing gel and belongs to the technical field of air purification materials. Through the synergistic effect of photocatalysts, antibacterial and mildew-proof components and slow-release structures, the air purification effect is achieved. Specifically, first, add a Leishi photocatalyst formaldehyde-removing liquid, activated carbon and a gelling agent into a reaction kettle to perform a hydrothermal reaction to obtain a solution A; then, add a surfactant, antibacterial and mildew-proof formaldehyde-removing powder HNF-001 and a synergist into the solution A, perform heat preservation and stirring to obtain a solution B; finally, close the heating and continue to stir, add a humectant into the solution B and perform capping to obtain the photocatalyst synergistic slow-release odor-removing gel. Through the synergistic proportioning of the Leishi photocatalyst formaldehyde-removing liquid, the antibacterial and mildew-proof formaldehyde-removing powder HNF-001 and the synergist, in combination with a slow-release gel structure and a flow guide design, the photocatalyst synergistic slow-release odor-removing gel realizes the multi-effect integration of formaldehyde decomposition, antibacterial and mildew-proof and odor absorption and decomposition. The photocatalyst synergistic slow-release odor-removing gel has long-acting slow-release and environmental adaptability and is suitable for air purification in household and vehicle-mounted scenes.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of air purification materials, in particular to a preparation method of a photocatalyst synergistic slow-release deodorizing gel. BACKGROUND

[0002] With the progress of science and technology, people's living standards improve, and 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 breeding ground for microorganisms, which is easy to produce various unpleasant odors. Therefore, air purification is of great significance to people's happy life.

[0003] The traditional deodorizing gel has 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 breeding and complex odor at the same time.

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

[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

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

[0008] To achieve the above-mentioned purpose, the present application provides a preparation method of a photocatalyst synergistic slow-release deodorizing gel, which specifically comprises the following steps:

[0009] (1) Add the Leisi photocatalyst deodorizing liquid, activated carbon and gelatin to the reaction kettle, and perform hydrothermal reaction to obtain solution A;

[0010] (2) Add the surfactant, antibacterial and mildew-resistant deodorizing formaldehyde powder HNF-001 and synergist to solution A, and heat and stir to obtain solution B;

[0011] (3) Turn off the heating and continue to stir, add the humectant to solution B, and then bottle to obtain the photocatalyst synergistic slow-release deodorizing gel.

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

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

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

[0015] Preferably, in step (2), the surfactant is one or more of PVP, SDS, PEG, and CTAB; and the synergist is one or more of phytoncides, persimmon tannin, and zinc castor oil alkyd.

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

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

[0018] Preferably, in step (3), the moisturizer is one or more of glycerin, butylene glycol, and sorbitol.

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

[0020] Preferably, in step (3), the filling temperature is 65-70℃.

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

[0022] (1) This invention solves the problem of easy bacterial and mold growth when traditional deodorizing gels are used by adding antibacterial, anti-mildew and formaldehyde-removing powder HNF-001, thereby improving the safety of use;

[0023] (2) This invention uses the adsorption of activated carbon and the decomposition of Leishide photocatalytic formaldehyde removal liquid, antibacterial and mildew-proof formaldehyde removal powder HNF-001 and synergist to actively adsorb and decompose harmful gas components in the air, thus solving the problem of purification saturation of traditional gels.

[0024] (3) This invention achieves rapid formaldehyde removal and odor elimination through the volatilization and decomposition of Leishide photocatalytic formaldehyde removal liquid and synergist. Subsequently, through the adsorption of activated carbon and the decomposition of antibacterial and anti-mildew formaldehyde removal powder HNF-001, a long-lasting purification effect is achieved.

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

[0026] (5) This invention is easy to use and is suitable for air purification in home and vehicle settings.

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

[0028] Figure 1 This is a schematic diagram of the process for preparing the photocatalytic synergistic sustained-release deodorizing gel according to the present invention;

[0029] Figure 2 This is a picture of the photocatalytic synergistic sustained-release deodorizing gel product prepared in Example 1 of the present invention. Detailed Implementation

[0030] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention should be considered equivalent substitutions and are included within the protection scope of the present invention. Furthermore, it should be understood that after reading the contents of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims and are all within the protection scope of the present invention.

[0031] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0032] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

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

[0034] The formaldehyde removal liquid used in the following examples is the final product obtained from the invention patent applied for by our company (Jiangxi Hongna New Material Technology Co., Ltd.) on July 16, 2024, with patent number 202410952828.0 and patent name "A method for preparing multi-component co-doped nano zinc oxide antibacterial sol".

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

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

[0037] Example 1

[0038] This embodiment provides a method for preparing a photocatalytic synergistic sustained-release deodorizing gel, such as... Figure 1 As shown, the specific steps include:

[0039] (1) Add 100mL of Leishide photocatalytic formaldehyde removal solution, 1.0g of activated carbon and 1.0g of carbomer 941 to the reaction vessel and carry out hydrothermal reaction at 90℃ for 30min to obtain solution A.

[0040] (2) Add 0.1g PEG, 0.5g antibacterial, antifungal and formaldehyde-removing powder HNF-001 and 0.5g phytoncides to solution A, keep warm and stir for 20min to obtain solution B.

[0041] (3) Turn off the heating and continue stirring. Add 0.5g of glycerin to solution B. When the temperature reaches 70℃, bottle the solution to obtain the photocatalytic synergistic slow-release deodorizing gel.

[0042] The photocatalytic synergistic sustained-release deodorizing gel product prepared in this embodiment is shown in the figure below. Figure 2 As shown.

[0043] Example 2

[0044] This embodiment provides a method for preparing a photocatalytic synergistic sustained-release deodorizing gel, specifically including the following steps:

[0045] (1) Add 100mL of Leishide photocatalytic formaldehyde removal solution, 1.5g of activated carbon and 1.5g of chitosan to the reaction vessel and carry out hydrothermal reaction at 91℃ for 25min to obtain solution A.

[0046] (2) Add 0.3g PVP, 0.8g antibacterial, antifungal and formaldehyde-removing powder HNF-001 and 0.8g persimmon tannin to solution A, keep warm and stir for 15 minutes to obtain solution B.

[0047] (3) Turn off the heating and continue stirring. Add 0.8g of butanediol to solution B. When the temperature reaches 67℃, bottle the solution to obtain the photocatalytic synergistic slow-release deodorizing gel.

[0048] Example 3

[0049] This embodiment provides a method for preparing a photocatalytic synergistic sustained-release deodorizing gel, specifically including the following steps:

[0050] (1) Add 100mL of Leishide photocatalytic formaldehyde removal solution, 2.0g of activated carbon and 2.0g of hydroxypropyl methylcellulose to the reaction vessel and carry out hydrothermal reaction at 92℃ for 20min to obtain solution A.

[0051] (2) Add 0.5g CTAB, 1.0g antibacterial, antifungal and formaldehyde-removing powder HNF-001 and 1.0g zinc castor oil alkyd to solution A, keep warm and stir for 10min to obtain solution B.

[0052] (3) Turn off the heating and continue stirring. Add 1.0g of sorbitol to solution B. When the temperature reaches 65℃, bottle the solution to obtain the photocatalytic synergistic slow-release deodorizing gel.

[0053] Comparative Example 1

[0054] The only difference between this comparative example and Example 1 is that activated carbon was not added in step (1). All other aspects are the same as in Example 1 and will not be repeated here.

[0055] Comparative Example 2

[0056] The only difference between this comparative example and Example 1 is that the surfactant PEG was not added in step (2). All other aspects are the same as in Example 1 and will not be repeated here.

[0057] Comparative Example 3

[0058] The only difference between this comparative example and Example 1 is that the antibacterial, anti-mildew and formaldehyde-removing powder HNF-001 was not added in step (2). All other aspects are the same as in Example 1 and will not be repeated here.

[0059] Comparative Example 4

[0060] The only difference between this comparative example and Example 1 is that phytoncides were not added in step (2). Everything else is the same as in Example 1, and will not be repeated here.

[0061] Test Example 1

[0062] The antibacterial properties of the deodorizing gels prepared in Examples 1-3 and Comparative Examples 1-4 were tested, including the following steps:

[0063] Weigh 10 mg of the photocatalytic synergistic sustained-release deodorizing gel prepared in Examples 1-3 and Comparative Examples 1-4, as well as commercially available similar products, and sterilize them with a UV sterilizer in a clean bench for 40 min. Dilute the bacterial culture for 8 h by 3 orders of magnitude, add the sterilized multifunctional zinc oxide-based nanocomposite antibacterial powder, and place in a shaker at 37℃ and 100 rpm for 4 h. Take 50 μL of the shaken bacterial culture, inoculate it onto a petri dish, and incubate it in a constant temperature and humidity incubator at 37℃ and 90% relative humidity for 24 h, then count the viable bacteria. The results are shown in Table 1.

[0064] Table 1

[0065]

[0066]

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

[0068] Test Example 2

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

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

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

[0072] Table 2

[0073]

[0074]

[0075] As shown in Table 2, the photocatalytic synergistic slow-release deodorizing gels prepared in Examples 1-3 of this invention have good formaldehyde degradation effects.

[0076] Test Example 3

[0077] Odor degradation experiments were conducted on the deodorizing gels prepared in Examples 1-3 and Comparative Examples 1-4, including the following steps:

[0078] Ammonia and hydrogen sulfide were used to simulate odors. 150g of the photocatalytic synergistic slow-release deodorizing gel prepared in Examples 1-3 and Comparative Examples 1-4, along with commercially available similar products, were added to a photocatalytic device (1L volume, 40W fluorescent lamp light source) to degrade ammonia and hydrogen sulfide, respectively, to evaluate the photocatalytic activity of the samples. Ammonia / hydrogen sulfide gas (initial mass concentration controlled at 0.1mg / L) was used as simulated pollutants. After a reaction of 100min, the ammonia / hydrogen sulfide concentrations were measured at a wavelength of 450nm to assess the photocatalytic activity of the samples under visible light irradiation. The results are shown in Table 3.

[0079] Ammonia degradation rate (%) = (initial ammonia mass concentration - ammonia mass concentration after 100 min) / initial ammonia mass concentration × 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 shown in Table 3, the photocatalytic synergistic slow-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 embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A preparation method of a photocatalyst synergistic slow-release deodorant gel, characterized in that, Specifically comprising the following steps: (1) adding the Reed photocatalyst formaldehyde removal liquid, activated carbon and gel agent into a reaction kettle to perform hydrothermal reaction to obtain solution A; (2) adding a surfactant, antibacterial and mildew-proof formaldehyde removal powder HNF-001 and a synergist into the solution A, and performing heat preservation and stirring to obtain solution B; (3) closing the heating and continuing to stir, adding a humectant into the solution B, and performing canning to obtain the photocatalyst synergistic slow-release odor removal gel; In step (1), the gel agent, activated carbon and Reed photocatalyst formaldehyde removal liquid are in a ratio of 1.0-2.0 g: 1.0-2.0 g: 100 mL; In step (2), the surfactant, antibacterial and mildew-proof formaldehyde removal powder HNF-001, synergist and Reed photocatalyst formaldehyde removal liquid in step (1) are in a ratio of 0.1-0.5 g: 0.5-1.0 g: 0.5-1.0 g: 100 mL; In step (2), the synergist is one or more of the following: fentanyl, persimmon tannin and zinc ricinoleate.

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

3. The preparation method of the 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 ℃, and the time of the hydrothermal reaction is 20-30 min.

4. The preparation method of the photocatalyst synergistic slow-release deodorant gel according to claim 1, characterized in that: In step (2), the surfactant is one or more of the following: PVP, SDS, PEG and CTAB.

5. The method for preparing the photocatalyst synergistic slow-release deodorant gel according to claim 1, characterized in that: In step (2), the heat preservation and stirring time is 10-20 min.

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

7. The preparation method of a photocatalytic synergistic sustained-release deodorizing gel according to claim 1, characterized in that: In step (3), the humectant and Reed photocatalyst formaldehyde removal liquid in step (1) are in a ratio of 0.5 g-1.0 g: 100 mL.

8. The method for preparing the photocatalyst synergistic slow-release deodorant gel according to claim 1, characterized in that: In step (3), the canning temperature is 65-70 ℃.

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