Self-extinguishing smokeless environment-friendly aromatherapy material and preparation method thereof

Abstract

The invention relates to the technical field of candles and manufacturing thereof, in particular to a self-extinguishing smokeless environment-friendly aromatherapy material and a preparation method thereof. The invention discloses a self-extinguishing smokeless environment-friendly aromatherapy material which is prepared from the following raw materials in parts by weight: 60-80 parts of composite vegetable wax, 3-8 parts of an essential oil slow-release composition, 5-12 parts of a self-extinguishing smokeless composition and 2-6 parts of an environment-friendly additive, the self-extinguishing smokeless composition is prepared from modified nanoparticles, gallic acid modified porous pectin and zinc-based MOF loaded cuprous oxide. In order to solve the problems that the aromatherapy effect is influenced and pollution is caused due to the generation of carbon-containing smoke in the combustion process of the aromatherapy candle, reduce the incomplete combustion probability of the aromatherapy candle, keep the pleasant and stable aroma and realize a good self-extinguishing smokeless effect.

Description

Technical Field

[0001] This application relates to the field of candles and their manufacturing technology, and more specifically, to a self-extinguishing, smokeless, environmentally friendly aromatherapy material and its preparation method. Background Technology

[0002] Scented candles, as a daily necessity combining practicality and decoration, have seen significant growth in recent years. By releasing fragrance when burned, they create a comfortable and pleasant atmosphere, effectively relieving stress and thus gaining popularity among consumers. Widely used in hotels, homes, and various other settings, scented candles not only beautify the environment but also provide relaxation. With societal progress and rising living standards, consumers are demanding higher quality and safety from scented candles. However, traditional scented candles have limitations in meeting these needs.

[0003] Traditional candles mostly use paraffin wax as their main raw material. Paraffin wax is largely derived from petroleum byproducts and is non-biodegradable. Furthermore, some scented candles contain chemically synthesized fragrances that release VOCs (volatile organic compounds) upon evaporation, posing serious environmental hazards. If traditional candles burn unattended for extended periods, they can easily cause fires, seriously threatening people's lives and property. Some candles using halogenated flame retardants result in abnormal wax burning rates, hindered fragrance release, and the release of toxic and harmful gases during combustion. These gases can directly harm human health, especially with prolonged exposure, potentially leading to respiratory illnesses and other health problems. They also have poor smoke suppression, exhibiting poor synergy between components and interference between fragrance release and smokeless effects, resulting in an imbalance in overall performance. In addition, existing technologies generally have design limitations, focusing on optimizing single performance aspects and failing to simultaneously address multiple technical indicators such as self-extinguishing smokelessness, environmental friendliness, and fragrance stability, making it difficult to meet the market's comprehensive demands for high-end scented candles. Summary of the Invention

[0004] In order to reduce the generation of carbon-containing smoke during the burning of scented candles, this application provides a self-extinguishing, smokeless, environmentally friendly scented material and its preparation method.

[0005] Firstly, this application provides a self-extinguishing, smokeless, environmentally friendly aromatherapy material, employing the following technical solution: A self-extinguishing, smokeless, environmentally friendly aromatherapy material is prepared from the following raw materials in parts by weight: 60-80 parts of composite plant wax, 3-8 parts of essential oil slow-release composition, 5-12 parts of self-extinguishing, smokeless composition, and 2-6 parts of environmentally friendly additives; wherein the self-extinguishing, smokeless composition includes modified nanoparticles, gallic acid-modified porous pectin, and zinc-based MOF-supported cuprous oxide.

[0006] The components of this self-extinguishing, smokeless, environmentally friendly aromatherapy material work synergistically to achieve adsorption, smoke suppression, and self-extinguishing effects. This effectively solves the problem of incomplete combustion producing carbon black and carbon monoxide, resulting in a final product with low smoke density and minimal carbon monoxide emissions, possessing the characteristics of self-extinguishing, smokeless, and environmentally friendly. Simultaneously, the essential oil slow-release composition enables sustained aroma release, further enhancing the product's overall performance while meeting aromatherapy requirements.

[0007] The composite plant wax ensures the candle has excellent shape retention and combustion stability, and is biodegradable, making it environmentally friendly. The essential oil slow-release composition enables sustained fragrance release, ensuring a uniform and long-lasting aroma during combustion. The self-extinguishing smokeless composition is key to achieving this effect. Modified nanoparticles adsorb carbon black particles produced during combustion, preventing the spread of black smoke. Simultaneously, the nanoparticles form a continuous, porous oxygen supply network, ensuring a sufficient oxygen supply during combustion and reducing incomplete combustion caused by uneven oxygen distribution at the source. Gallic acid-modified porous pectin, after cross-linking, forms a natural porous network that specifically captures carbon monoxide through pore size sieving. Gallic acid grafting further enhances the capture efficiency by interacting with the captured carbon monoxide molecules. Furthermore, the regular one-dimensional channels of the zinc-based MOF enrich carbon monoxide, creating a locally high-concentration reaction environment. Cuprous oxide serves as the catalytic active center, with metastable copper ions catalyzing the conversion of carbon monoxide to carbon dioxide. The resulting copper oxide can be regenerated by a small amount of reducing low-carbon hydrocarbons obtained from the combustion of natural fatty acid esters and other hydrocarbon compounds, achieving cyclic regeneration of catalytic activity. Simultaneously, appropriate biological interactions among the components form a cohesive aromatherapy material, preventing the loss of functional components during high-temperature combustion and improving the system's thermal stability.

[0008] Preferably, the modified nanoparticles comprise modified montmorillonite and magnesium hydroxide in a mass ratio of (2-3):1.

[0009] More preferably, the preparation method of modified montmorillonite includes: adding chitosan aqueous solution to montmorillonite, then adding vanillin alcohol solution, refluxing at 60-70℃ for 4-6 hours, washing, drying, and grinding to obtain modified montmorillonite.

[0010] The layered structure of modified montmorillonite interweaves with magnesium hydroxide, with magnesium hydroxide particles filling the gaps between the layers to form a continuous, porous oxygen-supplying network. This reduces incomplete combustion caused by uneven oxygen supply at the source, thereby reducing the formation of soot and carbon monoxide. Modified montmorillonite adsorbs soot particles, preventing the diffusion of black smoke. Magnesium hydroxide decomposes and absorbs heat, lowering the combustion temperature, inhibiting the thermal decomposition of waxes, and reducing the formation of soot and carbon monoxide. Simultaneously, it fills the gaps in the montmorillonite network, enhancing structural stability and improving self-extinguishing and smokeless effects. However, excessively high modified montmorillonite content leads to a relatively loose network structure, hindering uniform oxygen penetration, resulting in insufficient combustion stability and an increased probability of incomplete combustion. Conversely, excessively high magnesium hydroxide content weakens the overall smoke suppression and stabilization effects, increasing smoke density.

[0011] Preferred preparation of gallic acid modified porous pectin: Pectin and copper nitrate are added to water, stirred in a water bath at 50-60℃, citric acid and gallic acid are added, the pH is adjusted to 8-9 and stirred for 3-5 hours, washed, dried, ground and sieved to obtain gallic acid modified porous pectin.

[0012] Preferred preparation of zinc-based MOF supported cuprous oxide: zinc acetate and 2,5-dihydroxyterephthalic acid are added to a mixed solvent of DMF, ethanol and water, and sonicated for 15-25 min. The mixture is then transferred to a hydrothermal reactor and reacted at 100-120℃ for 6-8 h to obtain zinc-based MOF. The zinc-based MOF is dispersed in water, cuprous chloride is added, sodium ascorbate is added via sonication, and the mixture is stirred in a water bath, centrifuged, washed, dried, ground and sieved to obtain zinc-based MOF supported cuprous oxide.

[0013] Preferably, the mass ratio of modified nanoparticles, gallic acid-modified porous pectin, and zinc-based MOF-supported cuprous oxide is (3-5):(2-4):1.

[0014] Schiff base groups are introduced onto the surface of montmorillonite through a condensation reaction between the amino groups of chitosan and the aldehyde groups of vanillin, which can specifically adsorb carbon black particles generated during combustion and prevent the diffusion of black smoke. Magnesium hydroxide undergoes a decomposition reaction during combustion, absorbing a large amount of heat, lowering the combustion temperature of the wax, inhibiting the thermal decomposition of the wax base, and reducing the generation of carbon black and carbon monoxide. Its particles can also fill the gaps between montmorillonite layers, enhancing structural stability. A porous network structure constructed from gallic acid-modified porous pectin allows carbon monoxide to diffuse into the pores and be captured; other impurities generated during combustion (such as carbon black particles and large molecular hydrocarbons) cannot penetrate the porous network, thus achieving specific sieving and capture of carbon monoxide. The copper ion-targeted coordination sites formed on the surface after modification with a copper ion template allow the captured carbon monoxide to come into close contact with the zinc-based MOF-supported cuprous oxide catalytic component, improving the smoke suppression effect and effectively reducing the smoke density level and carbon monoxide emissions during the combustion of aromatherapy materials. The one-dimensional channels and ultra-high specific surface area of ​​the zinc-based MOF allow for... A one-step enrichment process using gallic acid-modified porous pectin to capture activated carbon monoxide creates a locally high-concentration reaction environment around the catalytic active center. Cuprous oxide, acting as the catalytic active center, rapidly catalyzes the conversion of carbon monoxide to carbon dioxide. Its pore enrichment effect creates a high-concentration environment of activated carbon monoxide on the cuprous oxide surface, accelerating the catalytic conversion reaction. Simultaneously, the porous structure of the pectin complements the pore structure of the zinc-based MOF-supported cuprous oxide, enhancing overall capture and catalytic efficiency, preventing the loss of functional components during high-temperature combustion, improving the system's thermal stability, and achieving excellent self-extinguishing and smokeless effects. Therefore, if the gallic acid-modified porous pectin content is too low, its ability to capture carbon monoxide will decrease, leading to a reduction in the subsequent catalytic conversion efficiency of carbon monoxide by the zinc-based MOF-supported cuprous oxide, thus worsening the smoke-eliminating effect of the aromatherapy material and increasing the smoke density level.

[0015] Preferably, the essential oil sustained-release composition is a natural essential oil and β-cyclodextrin in a mass ratio of 1:(2-4).

[0016] Preferably, the natural essential oil is one or more of lavender essential oil, rose essential oil, and lemon essential oil.

[0017] More preferably, the natural essential oils are lavender essential oil, rose essential oil, and lemon essential oil in a mass ratio of 1:2:1.

[0018] The hydrophobic cavity of β-cyclodextrin can interact with natural essential oil molecules to form stable inclusion complexes through hydrophobic interactions. This can effectively slow down the volatilization rate of natural essential oils during storage and combustion, achieving a slow and uniform release of various natural essential oil aromas and meeting the demand for fresh and pleasant fragrances in aromatherapy products.

[0019] Preferably, the environmentally friendly additives are stearic acid and vitamin E in a mass ratio of 1:(1.5-2).

[0020] Stearic acid can regulate the melting point and burning rate of waxes, making the burning process stable and avoiding incomplete combustion caused by rate fluctuations; Vitamin E, as a natural antioxidant, can capture free radicals in the system and work synergistically with gallic acid to resist oxidation and delay the deterioration of wax bases and essential oils.

[0021] Preferably, the composite plant wax is a mixture of soybean wax and beeswax in a mass ratio of (3-5):1.

[0022] By replacing traditional petroleum-based paraffin wax with soy wax and beeswax, and combining it with stearic acid combustion regulators, the combustion process can be optimized, allowing the candle to burn completely without significant black smoke release. It is also biodegradable and environmentally friendly, while ensuring that the candle has good formability and combustion stability.

[0023] Secondly, this application provides a method for preparing a self-extinguishing, smokeless, environmentally friendly aromatherapy material, using the following technical solution: A method for preparing a self-extinguishing, smokeless, environmentally friendly aromatherapy material includes the following steps: weighing composite plant wax according to the specified weight parts, heating and melting it at 60-70℃, and stirring evenly; then adding environmentally friendly additives, continuing to stir for 10-20 minutes, adding the self-extinguishing, smokeless composition, and stirring at 60-70℃ for 20-30 minutes; then adding the essential oil slow-release composition, mixing and stirring, pouring into a molding mold, and cooling and solidifying to room temperature to obtain the self-extinguishing, smokeless, environmentally friendly aromatherapy material.

[0024] Preferably, the mixing and stirring is carried out at a speed of 500-800 r / min for 15-25 min.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The components of this self-extinguishing, smokeless, environmentally friendly aromatherapy material work synergistically to achieve adsorption, smoke suppression, and self-extinguishing effects. This effectively solves the problem of incomplete combustion producing carbon black and carbon monoxide, resulting in a final product with low smoke density and low carbon monoxide emissions, possessing the characteristics of self-extinguishing, smokeless, and environmentally friendly. Simultaneously, the essential oil slow-release composition enables sustained aroma release, further enhancing the product's overall performance while meeting aromatherapy requirements.

[0026] 2. Schiff base groups are introduced onto the surface of montmorillonite through a condensation reaction between the amino groups of chitosan and the aldehyde groups of vanillin. This allows for the specific adsorption of carbon black particles generated during combustion, preventing the diffusion of black smoke. Magnesium hydroxide undergoes a decomposition reaction during combustion, absorbing a large amount of heat, lowering the combustion temperature of the wax, inhibiting the thermal decomposition of the wax base, reducing the formation of carbon black and carbon monoxide, and its particles can also fill the gaps between montmorillonite layers, enhancing structural stability. Detailed Implementation

[0027] The present application will be further described in detail below with reference to the embodiments.

[0028] Soybean wax (52 degrees): purchased from Suzhou Chenhang Fine Chemical Co., Ltd.; low methoxy pectin: purchased from Guangdong Ome Chemical Reagent Co., Ltd.; montmorillonite K-10: purchased from Maclean's; chitosan (30,000 molecular weight): purchased from Xidian Experimental; magnesium hydroxide: purchased from Hebei Meixi Biotechnology. Unless otherwise specified, all raw materials used in the examples and comparative examples are conventional products that can be purchased from the market.

[0029] Preparation Example 1 The preparation method of modified montmorillonite includes: (1) adding 0.7g of chitosan to 10mL of water, adding 0.2mL of glacial acetic acid, stirring at 300r / min for 30min to form a chitosan aqueous solution; (2) adding 0.4g of vanillin to 30mL of anhydrous ethanol, sonicating for 15min to obtain an alcoholic solution of vanillin; adding 4.0g of montmorillonite to the chitosan aqueous solution, stirring at 70℃ water bath and 500r / min for 30min, then adding the alcoholic solution of vanillin, refluxing at 70℃ and 500r / min for 4h, washing with ethanol 3 times, vacuum drying at 60℃ for 8h, grinding through a 100-mesh sieve to obtain modified montmorillonite.

[0030] Preparation Example 2 Preparation of gallic acid modified porous pectin: Take 3.0 g of low methoxyl pectin and 0.2 g of copper nitrate, add 50 mL of water, stir at 400 r / min for 1 h in a 60 °C water bath, then add 0.5 g of citric acid and 0.3 g of gallic acid, stir for 5 min, adjust the pH of the system to 8 with 0.1 g of anhydrous sodium carbonate, stir at 500 r / min for 3 h at 60 °C, immerse in 1 mol / L hydrochloric acid solution, stir at 300 r / min for 2 h, wash with water until pH is neutral, vacuum dry at 55 °C for 6 h, grind through an 80 mesh sieve to obtain gallic acid modified porous pectin.

[0031] Preparation Example 3 Preparation of zinc-based MOF supported cuprous oxide: Take 0.8 g zinc acetate and 0.4 g 2,5-dihydroxyterephthalic acid, add 30 mL DMF, 10 mL ethanol and 10 mL water mixed solvent, sonicate for 15 min, transfer to hydrothermal reactor, stir at 300 r / min for 10 min, place in an oven and heat to 120 °C for 6 h, cool to room temperature, centrifuge at 8000 r / min for 10 min, wash twice with ethanol, vacuum dry at 60 °C for 4 h to obtain zinc-based MOF; disperse zinc-based MOF in 20 mL water, add 0.3 g cuprous chloride, sonicate for 20 min, add 0.1 g sodium ascorbate, water bath at 50 °C, stir at 400 r / min for 2 h, centrifuge, wash with water, vacuum dry at 70 °C for 10 h, grind through a 100 mesh sieve to obtain zinc-based MOF supported cuprous oxide.

[0032] Preparation Example 4 Preparation of the sustained-release composition of essential oils: Weigh 3g of natural essential oils and 6g of β-cyclodextrin, add 10mL of water, place in a 50℃ water bath, sonicate for 1h, and let stand and cool to room temperature to obtain the sustained-release composition of essential oils for later use. The natural essential oils are lavender essential oil, rose essential oil and lemon essential oil in a mass ratio of 1:2:1.

[0033] Preparation Example 5 Preparation of the sustained-release essential oil composition: Weigh 2g of natural essential oil and 7g of β-cyclodextrin, add 10mL of water, place in a 50℃ water bath, sonicate for 1h, and let stand and cool to room temperature to obtain the sustained-release essential oil composition for later use. The natural essential oils are lavender essential oil, rose essential oil and lemon essential oil in a mass ratio of 1:2:1.

[0034] Preparation Example 6 Preparation of the sustained-release essential oil composition: Weigh 4g of natural essential oil and 5g of β-cyclodextrin, add 10mL of water, place in a 50℃ water bath, sonicate for 1h, and let stand and cool to room temperature to obtain the sustained-release essential oil composition for later use. The natural essential oils are lavender essential oil, rose essential oil and lemon essential oil in a mass ratio of 1:2:1. Example 1

[0035] A self-extinguishing, smokeless, environmentally friendly aromatherapy material is prepared by weighing 70 parts of composite plant wax, heating and melting it at 70°C, and stirring until uniform; then adding 4 parts of environmentally friendly additives and continuing to stir for 20 minutes, followed by adding 8 parts of a self-extinguishing, smokeless composition; the self-extinguishing, smokeless composition consists of modified nanoparticles in a mass ratio of 5:4:1, gallic acid-modified porous pectin prepared in Preparation Example 2, and zinc-based MOF-supported cuprous oxide prepared in Preparation Example 3; first, the modified nanoparticles are added, and the stirring speed is increased to 1500 r / min for 20 minutes; then, the gallic acid-modified porous pectin prepared in Preparation Example 2 and the zinc-based MOF-supported cuprous oxide prepared in Preparation Example 3 are added sequentially, and the mixture is stirred at 70°C for 30 minutes; then, 6 parts of the essential oil slow-release composition prepared in Preparation Example 4 are added, and the mixture is stirred at 800 r / min for 25 minutes, poured into a molding mold, and cooled and solidified to room temperature to obtain the self-extinguishing, smokeless, environmentally friendly aromatherapy material. The composite plant wax is a mixture of soybean wax and beeswax in a mass ratio of 3:1; the environmentally friendly additives are stearic acid and vitamin E in a mass ratio of 1:1.5. The modified nanoparticles are modified montmorillonite and magnesium hydroxide prepared in Preparation Example 1 in a mass ratio of 2:1. Example 2

[0036] The only difference between this embodiment and Example 1 is that the essential oil sustained-release composition is the same as the essential oil sustained-release composition obtained in Preparation Example 5. Example 3

[0037] The only difference between this embodiment and Example 1 is that the essential oil sustained-release composition is the same as the essential oil sustained-release composition prepared in Example 6. Example 4

[0038] The only difference between this embodiment and Example 1 is that the modified nanoparticles are the modified montmorillonite and magnesium hydroxide prepared in Example 1 with a mass ratio of 5:1. Example 5

[0039] The only difference between this embodiment and Example 1 is that the modified nanoparticles are the modified montmorillonite and magnesium hydroxide prepared in Example 1 with a mass ratio of 1:1. Example 6

[0040] The only difference between this embodiment and Example 1 is that the modified nanoparticles are montmorillonite and magnesium hydroxide in a mass ratio of 1:1. Example 7

[0041] The only difference between this embodiment and Example 1 is that the self-extinguishing smokeless composition is montmorillonite in a mass ratio of 5:4:1, gallic acid-modified porous pectin prepared in Example 2, and zinc-based MOF-supported cuprous oxide prepared in Example 3. Example 8

[0042] The only difference between this embodiment and Example 1 is that the self-extinguishing smokeless composition is modified nanoparticles with a mass ratio of 8:1:1, gallic acid modified porous pectin prepared in Preparation Example 2, and zinc-based MOF supported cuprous oxide prepared in Preparation Example 3.

[0043] Comparative Example 1 The only difference between Comparative Example 1 and Example 1 is that the self-extinguishing smokeless composition is modified nanoparticles with a mass ratio of 9:1 and the zinc-based MOF-supported cuprous oxide prepared in Preparation Example 3.

[0044] Comparative Example 2 The only difference between Comparative Example 2 and Example 1 is that the self-extinguishing smokeless composition is modified nanoparticles with a mass ratio of 6:4, and the gallic acid modified porous pectin prepared in Preparation Example 2 is used.

[0045] Comparative Example 3 The only difference between Comparative Example 3 and Example 1 is that the self-extinguishing smokeless composition was replaced with an equal mass of modified nanoparticles.

[0046] Comparative Example 4 The only difference between Comparative Example 4 and Example 1 is that the essential oil sustained-release composition was replaced with equal masses of lavender essential oil, rose essential oil and lemon essential oil in a mass ratio of 1:2:1.

[0047] For the self-extinguishing, smokeless, and environmentally friendly aromatherapy materials prepared in the examples and comparative examples, a: The carbon black index of scented candles was determined according to SN / T 3839-2014 "Standard for Determination of Carbon Black Generated During the Combustion of Imported and Exported Candles". b: Fragrance Residue: A sealed room with a volume of 30m³ was selected, with an indoor temperature of 25℃ and a relative humidity of 50%. Each test sample was placed in the room under the above conditions and ignited, and extinguished after burning for 2 hours. Ten evaluators with evaluation capabilities were selected to evaluate the fragrance residue in the room after the aromatherapy was burned. The evaluation and scoring were based on the fragrance at 0.5h and 5h after burning, the comfort of breathing before and after 0.5h and 5h, and the pleasantness of the fragrance. The pleasantness of the fragrance residue was tested (maximum score 10 points). A score of 8 or higher was considered excellent, a score of 6-7 was considered good, a score of 4-5 was considered good, and a total score of less than 4 was considered unqualified. c: Place the scented candle in a sealed container and burn it until the flame extinguishes itself. Use an infrared carbon monoxide analyzer to measure the carbon monoxide concentration in the sealed container after the candle has burned. Before the test, the oxygen volume fraction in the sealed container was 21%, and the carbon monoxide volume fraction was 0. The test results are as follows:

[0048] Based on the table above, comparing the self-extinguishing, smokeless, and environmentally friendly aromatherapy materials of Examples 1-3 and Comparative Example 4, it can be seen that the hydrophobic cavity of β-cyclodextrin, in conjunction with natural essential oil molecules, can form a stable inclusion complex through hydrophobic interactions. This can effectively slow down the evaporation rate of natural essential oils during storage and combustion, achieving a slow and uniform release of various natural essential oil aromas and meeting the demand for fresh and pleasant fragrances in aromatherapy products.

[0049] Comparing Examples 1 and 4-8 with Comparative Examples 1-3, it can be seen that the layered structure of modified montmorillonite and magnesium hydroxide interweave and intertwine to form a continuous and interconnected porous oxygen supply network to ensure oxygen supply and promote complete combustion. Furthermore, the Schiff base groups on the surface of modified montmorillonite can adsorb carbon black, and the combustion and decomposition of magnesium hydroxide absorbs heat, inhibits the thermal decomposition of wax base, and reduces the generation of carbon black and carbon monoxide. The combined effect of both reduces the generation of incomplete combustion products, achieving a self-extinguishing and smokeless effect. The porous network structure constructed by gallic acid-modified porous pectin captures carbon monoxide, and allows the captured carbon monoxide to come into close contact with the zinc-based MOF-supported cuprous oxide catalyst component, improving the smoke elimination effect, effectively reducing the smoke density level and carbon monoxide emission during the combustion of aromatherapy materials, improving the thermal stability of the system, and achieving a good self-extinguishing and smokeless effect.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A self-extinguishing, smokeless, environmentally friendly aromatherapy material, characterized in that, It is prepared from the following raw materials in parts by weight: 60-80 parts of composite plant wax, 3-8 parts of essential oil slow-release composition, 5-12 parts of self-extinguishing smokeless composition, and 2-6 parts of environmentally friendly additives; wherein the self-extinguishing smokeless composition includes modified nanoparticles, gallic acid modified porous pectin, and zinc-based MOF supported cuprous oxide.

2. The self-extinguishing, smokeless, environmentally friendly aromatherapy material according to claim 1, characterized in that, The modified nanoparticles comprise modified montmorillonite and magnesium hydroxide in a mass ratio of (2-3):

1.

3. The self-extinguishing, smokeless, environmentally friendly aromatherapy material according to claim 2, characterized in that, The preparation method of the modified montmorillonite includes: adding chitosan aqueous solution to montmorillonite, then adding vanillin alcohol solution, refluxing at 60-70℃ for 4-6 hours, washing, drying, and grinding to obtain modified montmorillonite.

4. The self-extinguishing, smokeless, environmentally friendly aromatherapy material according to claim 1, characterized in that, The mass ratio of the modified nanoparticles, gallic acid-modified porous pectin, and zinc-based MOF-supported cuprous oxide is (3-5):(2-4):

1.

5. The self-extinguishing, smokeless, environmentally friendly aromatherapy material according to claim 1, characterized in that, The essential oil sustained-release composition is a natural essential oil and β-cyclodextrin in a mass ratio of 1:(2-4).

6. The self-extinguishing, smokeless, environmentally friendly aromatherapy material according to claim 5, characterized in that, The natural essential oil is one or more of lavender essential oil, rose essential oil, and lemon essential oil.

7. The self-extinguishing, smokeless, environmentally friendly aromatherapy material according to claim 1, characterized in that, The environmentally friendly additives are stearic acid and vitamin E in a mass ratio of 1:(1.5-2).

8. The self-extinguishing, smokeless, environmentally friendly aromatherapy material according to claim 1, characterized in that, The composite plant wax is a mixture of soybean wax and beeswax in a mass ratio of (3-5):

1.

9. The method for preparing the self-extinguishing, smokeless, environmentally friendly aromatherapy material according to any one of claims 1-8, characterized in that, The process includes the following steps: Weigh the composite plant wax according to the specified weight, heat and melt it at 60-70℃, and stir evenly; then add environmentally friendly additives and continue stirring for 10-20 minutes; add the self-extinguishing smokeless composition and stir at 60-70℃ for 20-30 minutes; then add the essential oil slow-release composition, mix and stir, pour into a molding mold, and cool and solidify to room temperature to obtain the self-extinguishing smokeless environmentally friendly aromatherapy material.

10. The method for preparing the self-extinguishing, smokeless, environmentally friendly aromatherapy material according to claim 9, characterized in that, The mixing and stirring is carried out at a speed of 500-800 r / min for 15-25 min.

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