An antioxidant repair mask containing agarwood extract and a preparation method thereof

Abstract

This invention relates to the field of cosmetic technology, specifically to an antioxidant and repairing facial mask containing agarwood extract, comprising an essence and a modified bamboo fiber substrate. The essence is composed of the following ingredients: 1.5 to 2.5 parts modified agarwood extract, 1 to 1.8 parts carboxymethylated modified hyaluronic acid, 0.6 to 0.9 parts ceramide NP, 1.1 to 1.7 parts ascorbate glucoside, 5.5 to 7 parts glycerin, 3.5 to 4.5 parts propylene glycol, 0.15 to 0.25 parts thickener, 0.12 to 0.18 parts preservative, and 78 to 86 parts deionized water. In this invention, the addition of modified agarwood extract enhances the stability and antioxidant properties of the agarwood components, extending the product's shelf life. The addition of carboxymethylated modified hyaluronic acid improves skin penetration, allowing the essence components to penetrate deeply into the skin. The modified bamboo fiber substrate, working in conjunction with the essence, ensures its stability and facilitates the absorption of the agarwood components.

Description

Technical Field

[0001] This invention relates to the field of cosmetic technology, and more specifically, to an antioxidant repair mask containing agarwood extract and its preparation method. Background Technology

[0002] Antioxidant repair masks are a popular skincare category that focuses on oxidative damage and barrier repair. Their core function is to eliminate free radicals through antioxidants, resisting oxidative stress caused by UV rays, environmental pollution, and lack of sleep, reducing dullness and fine lines. Simultaneously, they are combined with barrier repair ingredients to repair damaged stratum corneum, improving dryness, sensitivity, and redness. These products prioritize high-efficiency activity and gentle compatibility, achieving synergistic effects of antioxidation, repair, and moisturizing through optimized ingredient combinations, carrier materials, and penetration technology. They are suitable for various damaged skin care needs, meeting consumers' pursuit of natural, long-lasting, and gentle skincare, making them key products for targeted improvement of skin condition in daily skincare.

[0003] Existing antioxidant and repair masks containing agarwood extract are used to repair damaged stratum corneum. However, the high fat solubility of agarwood extract results in poor water solubility, leading to uneven dispersion in the overall essence. This can cause localized high concentrations of essence, resulting in a sticky feel on the skin and easy oxidation, causing the essence to lose its effectiveness quickly within its shelf life. Furthermore, the lack of a suitable mask sheet hinders the penetration of the active ingredients in agarwood into the skin. Traditional mask sheets have insufficient absorbency, leading to a high rate of essence loss during application. Most masks rely solely on the effects of agarwood, failing to simultaneously provide antioxidant, repair, and moisturizing benefits, thus failing to fully utilize the anti-inflammatory and antioxidant properties of agarwood, resulting in a poor overall mask effect. Therefore, this invention provides an antioxidant and repair mask containing agarwood extract and its preparation method. Summary of the Invention

[0004] The purpose of this invention is to provide an antioxidant repair mask containing agarwood extract and its preparation method. The antioxidant repair mask containing agarwood extract prepared by this invention enhances the stability of active ingredients, prolongs the duration of product efficacy, and improves skin penetration. It not only ensures the stability of the essence but also helps the active ingredients penetrate and absorb, thereby improving the antioxidant repair efficacy during use.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An antioxidant repair mask containing agarwood extract includes an essence and a modified bamboo fiber substrate. The essence is composed of the following ingredients: 1.5 to 2.5 parts modified agarwood extract, 1 to 1.8 parts carboxymethylated modified hyaluronic acid, 0.6 to 0.9 parts ceramide NP, 1.1 to 1.7 parts ascorbate glucoside, 5.5 to 7 parts glycerin, 3.5 to 4.5 parts propylene glycol, 0.15 to 0.25 parts thickener, 0.12 to 0.18 parts preservative, and 78 to 86 parts deionized water. The preparation steps of the antioxidant repair mask containing agarwood extract are as follows: S1. Take deionized water, add glycerin and propylene glycol, stir at 200 rpm at 40°C until completely dissolved to form a moisturizing solvent base, slowly add thickener, stir at 800 rpm for 10 minutes to disperse until no particles are present, and continue to keep warm at 40°C. S2. Take ceramide NP, add propylene glycol, stir at 500 rpm in a 50°C water bath until dissolved to form a ceramide pre-solution, slowly add it to the moisturizing solvent base, and continue stirring for 10 minutes; S3. Add the modified agarwood extract containing β-cyclodextrin, and stir at 300 rpm at 40°C for 15 minutes to rapidly disperse the extract by utilizing the water solubility of the inclusion complex. S4. Add carboxymethylated modified hyaluronic acid and stir at 400 rpm at 35°C for 20 minutes to allow the carboxymethylated modified hyaluronic acid to fully swell and form a uniform colloid. S5. Cool to 30℃, add ascorbate glucoside, stir for 10 minutes until dissolved, and finally add preservative, stir for 5 minutes to mix well; S6. Transfer the mixture to a homogenizer and process it at 2000 rpm for 5 minutes to ensure that the mixture is homogeneous and free of layers and particles. Then, vacuum degas for 10 minutes to remove air bubbles and obtain an antioxidant and repair synergistic essence. S7. The modified bamboo fiber substrate is sterilized with ultraviolet light for 15 minutes to remove microbial contamination. It is then transferred to a 25°C constant temperature mixing tank and stirred at 10 rpm for 15 minutes. After stirring is stopped, it is allowed to stand for 10 minutes to allow the modified bamboo fiber substrate to fully absorb the essence. The modified bamboo fiber substrate is then gently pressed with a stainless steel filter to remove any unabsorbed free essence from the surface. The saturated modified bamboo fiber substrate is then laid flat in a sterile aluminum foil package and sealed to obtain an antioxidant repair mask containing agarwood extract.

[0006] Further, the preparation steps of the modified agarwood extract are as follows: 200-mesh agarwood powder is sieved, 8 times its weight of 70% ethanol solution is added, and the mixture is ultrasonically extracted twice at 50°C. The extracts are combined and concentrated under reduced pressure until no alcohol odor remains, yielding agarwood extract. This extract is refrigerated at 4°C for later use. β-cyclodextrin is weighed according to the specified ratio, added to deionized water, and stirred in a constant-temperature water bath at 60°C until the β-cyclodextrin is completely dissolved, forming a transparent β-cyclodextrin aqueous solution. The pretreated agarwood extract is added to the β-cyclodextrin aqueous solution and stirred at a constant temperature of 50°C for 30 minutes to initially disperse the agarwood extract. The mixture is then transferred to an ultrasonic device for ultrasonic treatment for 20 minutes. The ultrasonic cavitation effect promotes the hydrophobic interaction between the β-cyclodextrin cavities and the active components of agarwood, improving the inclusion efficiency of the agarwood extract. After ultrasonication, further treatment is performed... The mixture was stirred at 30℃ for 1 hour to stabilize the agarwood extract inclusion complex. The reaction solution was then refrigerated at 4℃ for 12 hours to promote the crystallization of the agarwood extract inclusion complex. The mixture was centrifuged at 4000 rpm for 15 minutes, and the precipitate was collected. It was washed twice with a small amount of anhydrous ethanol and dried under vacuum at 60℃ to constant weight. The precipitate was then pulverized through an 80-mesh sieve to obtain a white powdery modified agarwood extract. After inclusion with β-cyclodextrin, the water solubility of the modified agarwood extract was increased by 3 to 5 times, allowing it to be evenly dispersed in the mask essence. This avoids the problems of excessively high local concentration and poor skin feel caused by uneven dispersion of traditional agarwood extracts. By combining low-temperature crystallization purification, oxygen is effectively isolated from contact with active ingredients, improving the retention rate of agarwood active ingredients and extending the half-life by 2 times, thus solving the problem of easy oxidation and deactivation.

[0007] Furthermore, the mass ratio of the agarwood powder to β-cyclodextrin is 1:5, the mass ratio of the total mass of the agarwood powder and β-cyclodextrin to deionized water is 1:10, and the mass ratio of the agarwood extract inclusion complex crystals to anhydrous ethanol is 1:2.

[0008] Further, the preparation steps of the carboxymethylated modified hyaluronic acid are as follows: Weigh hyaluronic acid, add 80% ethanol aqueous solution, stir at 200 rpm for 30 minutes at room temperature to allow the hyaluronic acid to fully swell and avoid clumping, slowly add sodium hydroxide powder, and stir at 30°C for 1 hour to activate the hydroxyl groups on the hyaluronic acid molecular chain into oxygen anions under alkaline conditions, enhancing the nucleophilic reaction activity with sodium chloroacetate, add sodium chloroacetate according to the ratio, raise the temperature to 50°C, and stir at 300 rpm for 4 hours. During the reaction, the hydroxyl groups of hyaluronic acid undergo a nucleophilic substitution reaction with sodium chloroacetate, introducing carboxymethyl groups. By controlling the reaction temperature and time, the degree of carboxymethyl substitution is precisely controlled at 0.8-1.2. After the reaction, adjust the pH to 6.5-7 with 10% hydrochloric acid. Add 3 times the volume of anhydrous ethanol, stir and precipitate for 2 hours, centrifuge at 4000 rpm for 10 minutes, collect the hyaluronic acid precipitate, wash the hyaluronic acid precipitate 3 times with 80% ethanol aqueous solution, vacuum dry at 60℃ to constant weight, pulverize the hyaluronic acid and pass it through a 100-mesh sieve to obtain carboxymethylated modified hyaluronic acid. Swelling with 80% ethanol aqueous solution prevents hyaluronic acid from clumping, and sodium hydroxide activation enhances the reactivity of hydroxyl groups, laying the foundation for subsequent modification. Using hyaluronic acid as the base material, the water solubility is improved by introducing carboxymethyl groups, while avoiding excessive modification that would lead to excessively large molecular volume of hyaluronic acid, thus improving its skin penetration. Impurities are removed from the hyaluronic acid to ensure purity, solving the contradiction of traditional hyaluronic acid having strong moisturizing but weak penetration. It also has high compatibility, helping to promote penetration and moisturize simultaneously with the modified bamboo fiber base material.

[0009] Furthermore, the mass ratio of hyaluronic acid, sodium chloroacetate, and sodium hydroxide is 1:2:1.5, the mass ratio of hyaluronic acid and hyaluronic acid precipitate to 80% ethanol aqueous solution is 1:15, and the mass ratio of hyaluronic acid to 10% hydrochloric acid is 1:0.05.

[0010] Furthermore, the thickener is xanthan gum, and the preservative is methylparaben.

[0011] Furthermore, the mass ratio of the modified agarwood extract, ceramide NP, and ascorbate glucoside is 3:1:2.

[0012] Further, the preparation steps of the modified bamboo fiber substrate are as follows: Bamboo fiber is taken, and degreased and dewaxed by stirring at 60°C for 30 minutes with a 5% sodium hydroxide solution. It is then washed with deionized water, and ultrasonically treated at 40°C for 20 minutes with a 3% hydrogen peroxide solution to remove lignin impurities. After drying, clean bamboo fiber is obtained. 80% isopropanol is added to the clean bamboo fiber, and after stirring to swell, sodium hydroxide is added. The mixture is stirred at 30°C for 1 hour to activate the fiber hydroxyl groups. Propylene oxide is added dropwise, and the mixture is sealed and stirred at 50°C for 3 hours. The degree of hydroxypropyl substitution is controlled at 0.3–0.5 to introduce hydrophilic hydroxypropyl groups into the fiber. The pH is adjusted to 6.5–7 with 10% hydrochloric acid. The bamboo fiber surface is washed alternately with 80% isopropanol and deionized water to remove residual reagents. After pre-drying at 30°C for 1 hour, it is vacuum dried at 50°C for 2 hours to form a modified bamboo fiber substrate. The pretreatment removes impurities from the bamboo fiber surface, increasing the exposure of hydroxyl groups on the bamboo fiber surface and providing sufficient active sites for modification. Then, it is activated by alkali and grafted with propylene oxide, with precise control of the degree of hydroxypropyl substitution of 0.3 to 0.5, introducing hydrophilic groups, which increases the adsorption capacity of bamboo fiber, reduces the loss rate of active ingredients to less than 5%, and has a good facial fit, preventing the problems of poor adsorption of essence and easy loss of essence components in traditional mask substrates.

[0013] Furthermore, based on 100g of bamboo fiber, the amount of propylene oxide is 40-60g, the amount of 5% sodium hydroxide solution is 5-8g, and the amount of 80% isopropanol solution is 1000g. The mass ratio of bamboo fiber to 80% isopropanol solution is 1:10, the mass ratio of bamboo fiber to deionized water is 1:5, the mass ratio of bamboo fiber to 3% hydrogen peroxide solution is 1:8, and the mass ratio of bamboo fiber to 10% hydrochloric acid is 1:0.03.

[0014] Furthermore, the mass ratio of the modified bamboo fiber substrate to the essence is 1:10.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention completely solves the problems of poor water solubility and uneven dispersion of agarwood extract by using modified agarwood extract. After encapsulation with β-cyclodextrin, the water solubility is improved, and it can be evenly dispersed in the mask essence, avoiding local concentration imbalance and sticky skin feel. It significantly enhances the stability of active ingredients. Combined with low-temperature crystallization purification, the half-life is extended by a factor of 1, effectively resisting oxidative degradation, extending the product's shelf life and duration of efficacy, and giving the modified agarwood extract the basic anti-inflammatory and antioxidant properties, avoiding stratification when mixed with other ingredients.

[0016] 2. This invention utilizes carboxymethylated modified hyaluronic acid as a base material. The introduction of carboxymethyl groups enhances water solubility while avoiding excessive molecular size due to over-modification, thus improving skin penetration. After neutralization, ethanol precipitation, and washing to remove impurities, purity is ensured. This resolves the contradiction of traditional hyaluronic acid's strong moisturizing effect but weak penetration. It forms a synergistic effect with modified agarwood extract, enhancing the adhesion and penetration efficiency of the modified agarwood extract on the skin surface through hydrogen bonding, thereby improving skin penetration. This ensures long-lasting moisturizing while opening penetration channels for active ingredients, helping agarwood ketones and sesquiterpenes penetrate deep into the skin to exert their antioxidant effects. The low molecular weight base material eliminates the risk of clumping after modification, and the purified material has low impurity residue, allowing for uniform compounding with ceramide NP and ascorbate glucoside, avoiding system stratification, and simultaneously improving the smoothness of the mask.

[0017] 3. This invention improves the adsorption capacity of bamboo fiber by modifying the bamboo fiber substrate, thereby reducing the loss rate of active ingredients. The hydrophilicity and microporous structure of the modified bamboo fiber can firmly anchor the active ingredients, which are slowly released during application, prolonging the duration of efficacy. It also has good adhesion to the face. The modified bamboo fiber substrate, carboxymethylated hyaluronic acid, and modified agarwood extract work synergistically to ensure the stability of the essence system and promote the penetration and absorption of active ingredients, thereby improving the antioxidant and repair effects during use. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that the raw materials used in the following embodiments are all commercially available.

[0020] Example 1: An antioxidant repair mask containing agarwood extract, comprising an essence and a modified bamboo fiber substrate. The essence is composed of the following ingredients: 1.5 parts modified agarwood extract, 1 part carboxymethylated modified hyaluronic acid, 0.6 parts ceramide NP, 1.1 parts ascorbate glucoside, 5.5 parts glycerin, 3.5 parts propylene glycol, 0.15 parts thickener, 0.12 parts preservative, and 86 parts deionized water; The preparation steps for an antioxidant and repairing face mask containing agarwood extract are as follows: S1. Take deionized water, add glycerin and propylene glycol, stir at 200 rpm at 40°C until completely dissolved to form a moisturizing solvent base, slowly add thickener, stir at 800 rpm for 10 minutes to disperse until no particles are present, and continue to keep warm at 40°C. S2. Take ceramide NP, add propylene glycol, stir at 500 rpm in a 50°C water bath until dissolved to form a ceramide pre-solution, slowly add it to the moisturizing solvent base, and continue stirring for 10 minutes; S3. Add the modified agarwood extract containing β-cyclodextrin, and stir at 300 rpm at 40°C for 15 minutes to rapidly disperse the extract by utilizing the water solubility of the inclusion complex. S4. Add carboxymethylated modified hyaluronic acid and stir at 400 rpm at 35°C for 20 minutes to allow the carboxymethylated modified hyaluronic acid to fully swell and form a uniform colloid. S5. Cool to 30℃, add ascorbate glucoside, stir for 10 minutes until dissolved, and finally add preservative, stir for 5 minutes to mix well; S6. Transfer the mixture to a homogenizer and process it at 2000 rpm for 5 minutes to ensure that the system is homogeneous and free of layers and particles. Then, degas it under vacuum for 10 minutes to remove air bubbles and obtain an antioxidant and repair synergistic essence. S7. The modified bamboo fiber substrate is sterilized with ultraviolet light for 15 minutes to remove microbial contamination. It is then transferred to a 25°C constant temperature mixing tank and stirred at 10 rpm for 15 minutes. After stirring is stopped, it is allowed to stand for 10 minutes to allow the modified bamboo fiber substrate to fully absorb the essence. The modified bamboo fiber substrate is then gently pressed with a stainless steel filter to remove any unabsorbed free essence from the surface. The saturated modified bamboo fiber substrate is then laid flat in a sterile aluminum foil package and sealed. It is stored in a dark environment below 25°C to obtain an antioxidant repair mask containing agarwood extract.

[0021] The preparation steps of the modified agarwood extract are as follows: Sift 200-mesh agarwood powder, add 8 times its weight of 70% ethanol solution, and extract twice with ultrasound at 50℃. Combine the extracts, concentrate under reduced pressure until no alcohol odor remains, and obtain agarwood extract. Refrigerate at 4℃ for later use. Weigh β-cyclodextrin according to the formula, add deionized water, and stir in a constant temperature water bath at 60℃ until the β-cyclodextrin is completely dissolved, forming a transparent β-cyclodextrin aqueous solution. Add the pretreated agarwood extract to the β-cyclodextrin aqueous solution, and stir at 50℃ for 30 minutes to initially disperse the agarwood extract. Transfer to an ultrasonic device for ultrasonic treatment for 20 minutes. Utilize the ultrasonic cavitation effect to promote the hydrophobic interaction between the β-cyclodextrin cavities and the active ingredients of agarwood, improving the inclusion efficiency of the agarwood extract. After ultrasonication, continue stirring at 30℃ for 1 hour to stabilize the inclusion complex formation. Refrigerate the reaction solution at 4℃ for 12 hours to promote the formation of the inclusion complex. Crystallization was performed, and the mixture was centrifuged at 4000 rpm for 15 minutes. The precipitate was collected and washed twice with a small amount of anhydrous ethanol to precisely remove free components, ensuring the purity of the agarwood extract inclusion complex and preventing uneven dispersion caused by the leaching of lipid-soluble components in the subsequent mask. The mixture was then vacuum-dried at 60°C to constant weight, pulverized, and passed through an 80-mesh sieve to obtain a white powdery modified agarwood extract. After inclusion with β-cyclodextrin, the water solubility of the modified agarwood extract increased by 3-5 times, allowing for uniform dispersion in the mask essence. This avoids the problems of excessively high local concentrations and poor skin feel caused by uneven dispersion in traditional agarwood extracts. Combining this with low-temperature crystallization purification effectively isolates oxygen from the active ingredients, improving the retention rate of agarwood active ingredients and extending the half-life by 2 times, solving the problem of easy oxidation and degradation. The ultrasonic cavitation effect breaks through the limitations of traditional stirring of agarwood extract, increasing the inclusion rate and solving the problem of insufficient inclusion by the single stirring method. The mass ratio of agarwood powder to β-cyclodextrin was 1:5, the mass ratio of the total mass of agarwood powder and β-cyclodextrin to deionized water was 1:10, and the mass ratio of agarwood extract inclusion complex crystals to anhydrous ethanol was 1:2.

[0022] The preparation steps of carboxymethylated modified hyaluronic acid are as follows: Weigh low-molecular-weight hyaluronic acid, as it is easier to undergo carboxymethylation modification and has improved skin penetration after modification. Add 80% ethanol aqueous solution and stir at 200 rpm for 30 minutes at room temperature to allow the hyaluronic acid to fully swell and avoid clumping. Slowly add sodium hydroxide powder and stir at 30°C for 1 hour to activate the hydroxyl groups on the hyaluronic acid molecular chain into oxygen anions under alkaline conditions, enhancing the nucleophilic reaction activity with sodium chloroacetate. Add sodium chloroacetate according to the formula, raise the temperature to 50°C, and stir at 300 rpm for 4 hours. During the reaction, the hydroxyl groups of hyaluronic acid undergo nucleophilic substitution reaction with sodium chloroacetate, introducing carboxymethyl groups. By controlling the reaction temperature and time, the degree of carboxymethyl substitution is precisely controlled between 0.8 and 1.2. After the reaction, use 1 The pH was adjusted to 6.5-7 with 0% hydrochloric acid, and three times the volume of anhydrous ethanol was added. The mixture was stirred and precipitated for 2 hours. The mixture was then centrifuged at 4000 rpm for 10 minutes to collect the hyaluronic acid precipitate. The hyaluronic acid precipitate was washed three times with 80% ethanol aqueous solution and dried under vacuum at 60℃ to constant weight. The hyaluronic acid was pulverized and passed through a 100-mesh sieve to obtain carboxymethylated modified hyaluronic acid. Swelling with 80% ethanol aqueous solution prevented hyaluronic acid from clumping. Sodium hydroxide activation enhanced the reactivity of hydroxyl groups, laying the foundation for subsequent modifications. Using hyaluronic acid as the base material, the water solubility was improved by introducing carboxymethyl groups, while avoiding excessive modification that would result in an excessively large molecular size of hyaluronic acid, thus improving its skin penetration. Impurities were removed from the hyaluronic acid to ensure purity, resolving the contradiction of traditional hyaluronic acid's strong moisturizing but weak penetration. Furthermore, it has high compatibility, facilitating simultaneous penetration and moisturizing with the modified bamboo fiber base material.

[0023] The mass ratio of hyaluronic acid, sodium chloroacetate, and sodium hydroxide is 1:2:1.5; the mass ratio of hyaluronic acid and hyaluronic acid precipitate to 80% ethanol aqueous solution is 1:15; and the mass ratio of hyaluronic acid to 10% hydrochloric acid is 1:0.05.

[0024] The thickener is xanthan gum, and the preservative is methylparaben.

[0025] The mass ratio of modified agarwood extract, ceramide NP, and ascorbate glucoside was 3:1:2.

[0026] The preparation steps of the modified bamboo fiber substrate are as follows: Take bamboo fiber, degrease and dewax it by stirring at 60℃ for 30 minutes with 5% sodium hydroxide solution, wash it with deionized water, and then sonicate it at 40℃ for 20 minutes with 3% hydrogen peroxide solution to remove lignin impurities. After drying, clean bamboo fiber is obtained. Add 80% isopropanol to the clean bamboo fiber, stir to swell, add sodium hydroxide, stir at 30℃ for 1 hour to activate the hydroxyl groups of the fiber, add propylene oxide dropwise, and seal and stir the reaction at 50℃ for 3 hours, controlling the degree of hydroxypropyl substitution at 0.3-0.5 to introduce hydrophilic hydroxypropyl groups into the fiber. Add 10% hydrochloric acid to adjust the pH to 6.5-7, and wash it alternately with 80% isopropanol and deionized water to remove residual reagents on the surface of the bamboo fiber. After pre-drying at 30℃ for 1 hour, seal the reaction at 50℃. After air drying for 2 hours, it is formed into a modified bamboo fiber substrate. Pretreatment removes impurities from the surface of the bamboo fiber, increasing the exposure of hydroxyl groups on the surface of the bamboo fiber to provide sufficient active sites for modification. Then, it undergoes alkali activation and propylene oxide grafting reaction, precisely controlling the degree of hydroxypropyl substitution to 0.3-0.5, introducing hydrophilic groups, which increases the adsorption capacity of the bamboo fiber, reduces the loss rate of active ingredients to below 5%, and provides good facial adhesion. It avoids the problems of poor adsorption of essence and easy loss of essence components in traditional mask substrates. By utilizing the micropores and hydrophilicity of hydroxypropyl groups in the modified bamboo fiber substrate, the modified agarwood extract and ceramide NP component in the essence are bound to the fiber through hydrogen bonds, further reducing the loss of essence during the application of the modified bamboo fiber substrate.

[0027] Based on 100g of bamboo fiber, the following components are used: 40-60g of propylene oxide, 5-8g of 5% sodium hydroxide solution, and 1000g of 80% isopropanol solution. The mass ratio of bamboo fiber to 80% isopropanol solution is 1:10, the mass ratio of bamboo fiber to deionized water is 1:5, the mass ratio of bamboo fiber to 3% hydrogen peroxide solution is 1:8, and the mass ratio of bamboo fiber to 10% hydrochloric acid is 1:0.03.

[0028] The mass ratio of modified bamboo fiber substrate to essence is 1:10.

[0029] Example 2: An antioxidant repair mask containing agarwood extract, comprising an essence and a modified bamboo fiber substrate. The essence is composed of the following ingredients: 2 parts modified agarwood extract, 1.2 parts carboxymethylated modified hyaluronic acid, 0.7 parts ceramide NP, 1.3 parts ascorbate glucoside, 6 parts glycerin, 4 parts propylene glycol, 0.2 parts thickener, 0.15 parts preservative, and 82.45 parts deionized water; The preparation steps for an antioxidant and repairing face mask containing agarwood extract are as follows: S1. Take deionized water, add glycerin and propylene glycol, stir at 200 rpm at 40°C until completely dissolved to form a moisturizing solvent base, slowly add thickener, stir at 800 rpm for 10 minutes to disperse until no particles are present, and continue to keep warm at 40°C. S2. Take ceramide NP, add propylene glycol, stir at 500 rpm in a 50°C water bath until dissolved to form a ceramide pre-solution, slowly add it to the moisturizing solvent base, and continue stirring for 10 minutes; S3. Add the modified agarwood extract containing β-cyclodextrin, and stir at 300 rpm at 40°C for 15 minutes to rapidly disperse the extract by utilizing the water solubility of the inclusion complex. S4. Add carboxymethylated modified hyaluronic acid and stir at 400 rpm at 35°C for 20 minutes to allow the carboxymethylated modified hyaluronic acid to fully swell and form a uniform colloid. S5. Cool to 30℃, add ascorbate glucoside, stir for 10 minutes until dissolved, and finally add preservative, stir for 5 minutes to mix well; S6. Transfer the mixture to a homogenizer and process it at 2000 rpm for 5 minutes to ensure that the system is homogeneous and free of layers and particles. Then, degas it under vacuum for 10 minutes to remove air bubbles and obtain an antioxidant and repair synergistic essence. S7. The modified bamboo fiber substrate is sterilized with ultraviolet light for 15 minutes to remove microbial contamination. It is then transferred to a 25°C constant temperature mixing tank and stirred at 10 rpm for 15 minutes. After stirring is stopped, it is allowed to stand for 10 minutes to allow the modified bamboo fiber substrate to fully absorb the essence. The modified bamboo fiber substrate is then gently pressed with a stainless steel filter to remove any unabsorbed free essence from the surface. The saturated modified bamboo fiber substrate is then laid flat in a sterile aluminum foil package and sealed. It is stored in a dark environment below 25°C to obtain an antioxidant repair mask containing agarwood extract.

[0030] The preparation steps of the modified agarwood extract are as follows: Sift 200-mesh agarwood powder, add 8 times its weight of 70% ethanol solution, and extract twice with ultrasound at 50℃. Combine the extracts, concentrate under reduced pressure until no alcohol odor remains, and obtain agarwood extract. Refrigerate at 4℃ for later use. Weigh β-cyclodextrin according to the formula, add deionized water, and stir in a constant temperature water bath at 60℃ until the β-cyclodextrin is completely dissolved, forming a transparent β-cyclodextrin aqueous solution. Add the pretreated agarwood extract to the β-cyclodextrin aqueous solution, and stir at 50℃ for 30 minutes to initially disperse the agarwood extract. Transfer to an ultrasonic device for ultrasonic treatment for 20 minutes. Utilize the ultrasonic cavitation effect to promote the hydrophobic interaction between the β-cyclodextrin cavities and the active ingredients of agarwood, improving the inclusion efficiency of the agarwood extract. After ultrasonication, continue stirring at 30℃ for 1 hour to stabilize the inclusion complex formation. Refrigerate the reaction solution at 4℃ for 12 hours to promote the formation of the inclusion complex. Crystallization was performed, and the mixture was centrifuged at 4000 rpm for 15 minutes. The precipitate was collected and washed twice with a small amount of anhydrous ethanol to precisely remove free components, ensuring the purity of the agarwood extract inclusion complex and preventing uneven dispersion caused by the leaching of lipid-soluble components in the subsequent mask. The mixture was then vacuum-dried at 60°C to constant weight, pulverized, and passed through an 80-mesh sieve to obtain a white powdery modified agarwood extract. After inclusion with β-cyclodextrin, the water solubility of the modified agarwood extract increased by 3-5 times, allowing for uniform dispersion in the mask essence. This avoids the problems of excessively high local concentrations and poor skin feel caused by uneven dispersion in traditional agarwood extracts. Combining this with low-temperature crystallization purification effectively isolates oxygen from the active ingredients, improving the retention rate of agarwood active ingredients and extending the half-life by 2 times, solving the problem of easy oxidation and degradation. The ultrasonic cavitation effect breaks through the limitations of traditional stirring of agarwood extract, increasing the inclusion rate and solving the problem of insufficient inclusion by the single stirring method. The mass ratio of agarwood powder to β-cyclodextrin was 1:5, the mass ratio of the total mass of agarwood powder and β-cyclodextrin to deionized water was 1:10, and the mass ratio of agarwood extract inclusion complex crystals to anhydrous ethanol was 1:2.

[0031] The preparation steps of carboxymethylated modified hyaluronic acid are as follows: Weigh low-molecular-weight hyaluronic acid, as it is easier to undergo carboxymethylation modification and has improved skin penetration after modification. Add 80% ethanol aqueous solution and stir at 200 rpm for 30 minutes at room temperature to allow the hyaluronic acid to fully swell and avoid clumping. Slowly add sodium hydroxide powder and stir at 30°C for 1 hour to activate the hydroxyl groups on the hyaluronic acid molecular chain into oxygen anions under alkaline conditions, enhancing the nucleophilic reaction activity with sodium chloroacetate. Add sodium chloroacetate according to the formula, raise the temperature to 50°C, and stir at 300 rpm for 4 hours. During the reaction, the hydroxyl groups of hyaluronic acid undergo nucleophilic substitution reaction with sodium chloroacetate, introducing carboxymethyl groups. By controlling the reaction temperature and time, the degree of carboxymethyl substitution is precisely controlled between 0.8 and 1.2. After the reaction, use 1 The pH was adjusted to 6.5-7 with 0% hydrochloric acid, and three times the volume of anhydrous ethanol was added. The mixture was stirred and precipitated for 2 hours. The mixture was then centrifuged at 4000 rpm for 10 minutes to collect the hyaluronic acid precipitate. The hyaluronic acid precipitate was washed three times with 80% ethanol aqueous solution and dried under vacuum at 60℃ to constant weight. The hyaluronic acid was pulverized and passed through a 100-mesh sieve to obtain carboxymethylated modified hyaluronic acid. Swelling with 80% ethanol aqueous solution prevented hyaluronic acid from clumping. Sodium hydroxide activation enhanced the reactivity of hydroxyl groups, laying the foundation for subsequent modifications. Using hyaluronic acid as the base material, the water solubility was improved by introducing carboxymethyl groups, while avoiding excessive modification that would result in an excessively large molecular size of hyaluronic acid, thus improving its skin penetration. Impurities were removed from the hyaluronic acid to ensure purity, resolving the contradiction of traditional hyaluronic acid's strong moisturizing but weak penetration. Furthermore, it has high compatibility, facilitating simultaneous penetration and moisturizing with the modified bamboo fiber base material.

[0032] The mass ratio of hyaluronic acid, sodium chloroacetate, and sodium hydroxide is 1:2:1.5; the mass ratio of hyaluronic acid and hyaluronic acid precipitate to 80% ethanol aqueous solution is 1:15; and the mass ratio of hyaluronic acid to 10% hydrochloric acid is 1:0.05.

[0033] The thickener is xanthan gum, and the preservative is methylparaben.

[0034] The mass ratio of modified agarwood extract, ceramide NP, and ascorbate glucoside was 3:1:2.

[0035] The preparation steps of the modified bamboo fiber substrate are as follows: Take bamboo fiber, degrease and dewax it by stirring at 60℃ for 30 minutes with 5% sodium hydroxide solution, wash it with deionized water, and then sonicate it at 40℃ for 20 minutes with 3% hydrogen peroxide solution to remove lignin impurities. After drying, clean bamboo fiber is obtained. Add 80% isopropanol to the clean bamboo fiber, stir to swell, add sodium hydroxide, stir at 30℃ for 1 hour to activate the hydroxyl groups of the fiber, add propylene oxide dropwise, and seal and stir the reaction at 50℃ for 3 hours, controlling the degree of hydroxypropyl substitution at 0.3-0.5 to introduce hydrophilic hydroxypropyl groups into the fiber. Add 10% hydrochloric acid to adjust the pH to 6.5-7, and wash it alternately with 80% isopropanol and deionized water to remove residual reagents on the surface of the bamboo fiber. After pre-drying at 30℃ for 1 hour, seal the reaction at 50℃. After air drying for 2 hours, it is formed into a modified bamboo fiber substrate. Pretreatment removes impurities from the surface of the bamboo fiber, increasing the exposure of hydroxyl groups on the surface of the bamboo fiber to provide sufficient active sites for modification. Then, it undergoes alkali activation and propylene oxide grafting reaction, precisely controlling the degree of hydroxypropyl substitution to 0.3-0.5, introducing hydrophilic groups, which increases the adsorption capacity of the bamboo fiber, reduces the loss rate of active ingredients to below 5%, and provides good facial adhesion. It avoids the problems of poor adsorption of essence and easy loss of essence components in traditional mask substrates. By utilizing the micropores and hydrophilicity of hydroxypropyl groups in the modified bamboo fiber substrate, the modified agarwood extract and ceramide NP component in the essence are bound to the fiber through hydrogen bonds, further reducing the loss of essence during the application of the modified bamboo fiber substrate.

[0036] Based on 100g of bamboo fiber, the following components are used: 40-60g of propylene oxide, 5-8g of 5% sodium hydroxide solution, and 1000g of 80% isopropanol solution. The mass ratio of bamboo fiber to 80% isopropanol solution is 1:10, the mass ratio of bamboo fiber to deionized water is 1:5, the mass ratio of bamboo fiber to 3% hydrogen peroxide solution is 1:8, and the mass ratio of bamboo fiber to 10% hydrochloric acid is 1:0.03.

[0037] The mass ratio of modified bamboo fiber substrate to essence is 1:10.

[0038] Example 3: An antioxidant repair mask containing agarwood extract, comprising an essence and a modified bamboo fiber substrate. The essence is composed of the following ingredients: 2.5 parts modified agarwood extract, 1.8 parts carboxymethylated modified hyaluronic acid, 0.9 parts ceramide NP, 1.7 parts ascorbate glucoside, 7 parts glycerin, 4.5 parts propylene glycol, 0.25 parts thickener, 0.18 parts preservative, and 78 parts deionized water. The preparation steps for an antioxidant and repairing face mask containing agarwood extract are as follows: S1. Take deionized water, add glycerin and propylene glycol, stir at 200 rpm at 40°C until completely dissolved to form a moisturizing solvent base, slowly add thickener, stir at 800 rpm for 10 minutes to disperse until no particles are present, and continue to keep warm at 40°C. S2. Take ceramide NP, add propylene glycol, stir at 500 rpm in a 50°C water bath until dissolved to form a ceramide pre-solution, slowly add it to the moisturizing solvent base, and continue stirring for 10 minutes; S3. Add the modified agarwood extract containing β-cyclodextrin, and stir at 300 rpm at 40°C for 15 minutes to rapidly disperse the extract by utilizing the water solubility of the inclusion complex. S4. Add carboxymethylated modified hyaluronic acid and stir at 400 rpm at 35°C for 20 minutes to allow the carboxymethylated modified hyaluronic acid to fully swell and form a uniform colloid. S5. Cool to 30℃, add ascorbate glucoside, stir for 10 minutes until dissolved, and finally add preservative, stir for 5 minutes to mix well; S6. Transfer the mixture to a homogenizer and process it at 2000 rpm for 5 minutes to ensure that the system is homogeneous and free of layers and particles. Then, degas it under vacuum for 10 minutes to remove air bubbles and obtain an antioxidant and repair synergistic essence. S7. The modified bamboo fiber substrate is sterilized with ultraviolet light for 15 minutes to remove microbial contamination. It is then transferred to a 25°C constant temperature mixing tank and stirred at 10 rpm for 15 minutes. After stirring is stopped, it is allowed to stand for 10 minutes to allow the modified bamboo fiber substrate to fully absorb the essence. The modified bamboo fiber substrate is then gently pressed with a stainless steel filter to remove any unabsorbed free essence from the surface. The saturated modified bamboo fiber substrate is then laid flat in a sterile aluminum foil package and sealed. It is stored in a dark environment below 25°C to obtain an antioxidant repair mask containing agarwood extract.

[0039] The preparation steps of the modified agarwood extract are as follows: Sift 200-mesh agarwood powder, add 8 times its weight of 70% ethanol solution, and extract twice with ultrasound at 50℃. Combine the extracts, concentrate under reduced pressure until no alcohol odor remains, and obtain agarwood extract. Refrigerate at 4℃ for later use. Weigh β-cyclodextrin according to the formula, add deionized water, and stir in a constant temperature water bath at 60℃ until the β-cyclodextrin is completely dissolved, forming a transparent β-cyclodextrin aqueous solution. Add the pretreated agarwood extract to the β-cyclodextrin aqueous solution, and stir at 50℃ for 30 minutes to initially disperse the agarwood extract. Transfer to an ultrasonic device for ultrasonic treatment for 20 minutes. Utilize the ultrasonic cavitation effect to promote the hydrophobic interaction between the β-cyclodextrin cavities and the active ingredients of agarwood, improving the inclusion efficiency of the agarwood extract. After ultrasonication, continue stirring at 30℃ for 1 hour to stabilize the inclusion complex formation. Refrigerate the reaction solution at 4℃ for 12 hours to promote the formation of the inclusion complex. Crystallization was performed, and the mixture was centrifuged at 4000 rpm for 15 minutes. The precipitate was collected and washed twice with a small amount of anhydrous ethanol to precisely remove free components, ensuring the purity of the agarwood extract inclusion complex and preventing uneven dispersion caused by the leaching of lipid-soluble components in the subsequent mask. The mixture was then vacuum-dried at 60°C to constant weight, pulverized, and passed through an 80-mesh sieve to obtain a white powdery modified agarwood extract. After inclusion with β-cyclodextrin, the water solubility of the modified agarwood extract increased by 3-5 times, allowing for uniform dispersion in the mask essence. This avoids the problems of excessively high local concentrations and poor skin feel caused by uneven dispersion in traditional agarwood extracts. Combining this with low-temperature crystallization purification effectively isolates oxygen from the active ingredients, improving the retention rate of agarwood active ingredients and extending the half-life by 2 times, solving the problem of easy oxidation and degradation. The ultrasonic cavitation effect breaks through the limitations of traditional stirring of agarwood extract, increasing the inclusion rate and solving the problem of insufficient inclusion by the single stirring method. The mass ratio of agarwood powder to β-cyclodextrin was 1:5, the mass ratio of the total mass of agarwood powder and β-cyclodextrin to deionized water was 1:10, and the mass ratio of agarwood extract inclusion complex crystals to anhydrous ethanol was 1:2.

[0040] The preparation steps of carboxymethylated modified hyaluronic acid are as follows: Weigh low-molecular-weight hyaluronic acid, as it is easier to undergo carboxymethylation modification and has improved skin penetration after modification. Add 80% ethanol aqueous solution and stir at 200 rpm for 30 minutes at room temperature to allow the hyaluronic acid to fully swell and avoid clumping. Slowly add sodium hydroxide powder and stir at 30°C for 1 hour to activate the hydroxyl groups on the hyaluronic acid molecular chain into oxygen anions under alkaline conditions, enhancing the nucleophilic reaction activity with sodium chloroacetate. Add sodium chloroacetate according to the formula, raise the temperature to 50°C, and stir at 300 rpm for 4 hours. During the reaction, the hydroxyl groups of hyaluronic acid undergo nucleophilic substitution reaction with sodium chloroacetate, introducing carboxymethyl groups. By controlling the reaction temperature and time, the degree of carboxymethyl substitution is precisely controlled between 0.8 and 1.2. After the reaction, use 1 The pH was adjusted to 6.5-7 with 0% hydrochloric acid, and three times the volume of anhydrous ethanol was added. The mixture was stirred and precipitated for 2 hours. The mixture was then centrifuged at 4000 rpm for 10 minutes to collect the hyaluronic acid precipitate. The hyaluronic acid precipitate was washed three times with 80% ethanol aqueous solution and dried under vacuum at 60℃ to constant weight. The hyaluronic acid was pulverized and passed through a 100-mesh sieve to obtain carboxymethylated modified hyaluronic acid. Swelling with 80% ethanol aqueous solution prevented hyaluronic acid from clumping. Sodium hydroxide activation enhanced the reactivity of hydroxyl groups, laying the foundation for subsequent modifications. Using hyaluronic acid as the base material, the water solubility was improved by introducing carboxymethyl groups, while avoiding excessive modification that would result in an excessively large molecular size of hyaluronic acid, thus improving its skin penetration. Impurities were removed from the hyaluronic acid to ensure purity, resolving the contradiction of traditional hyaluronic acid's strong moisturizing but weak penetration. Furthermore, it has high compatibility, facilitating simultaneous penetration and moisturizing with the modified bamboo fiber base material.

[0041] The mass ratio of hyaluronic acid, sodium chloroacetate, and sodium hydroxide is 1:2:1.5; the mass ratio of hyaluronic acid and hyaluronic acid precipitate to 80% ethanol aqueous solution is 1:15; and the mass ratio of hyaluronic acid to 10% hydrochloric acid is 1:0.05.

[0042] The thickener is xanthan gum, and the preservative is methylparaben.

[0043] The mass ratio of modified agarwood extract, ceramide NP, and ascorbate glucoside was 3:1:2.

[0044] The preparation steps of the modified bamboo fiber substrate are as follows: Take bamboo fiber, degrease and dewax it by stirring at 60℃ for 30 minutes with 5% sodium hydroxide solution, wash it with deionized water, and then sonicate it at 40℃ for 20 minutes with 3% hydrogen peroxide solution to remove lignin impurities. After drying, clean bamboo fiber is obtained. Add 80% isopropanol to the clean bamboo fiber, stir to swell, add sodium hydroxide, stir at 30℃ for 1 hour to activate the hydroxyl groups of the fiber, add propylene oxide dropwise, and seal and stir the reaction at 50℃ for 3 hours, controlling the degree of hydroxypropyl substitution at 0.3-0.5 to introduce hydrophilic hydroxypropyl groups into the fiber. Add 10% hydrochloric acid to adjust the pH to 6.5-7, and wash it alternately with 80% isopropanol and deionized water to remove residual reagents on the surface of the bamboo fiber. After pre-drying at 30℃ for 1 hour, seal the reaction at 50℃. After air drying for 2 hours, it is formed into a modified bamboo fiber substrate. Pretreatment removes impurities from the surface of the bamboo fiber, increasing the exposure of hydroxyl groups on the surface of the bamboo fiber to provide sufficient active sites for modification. Then, it undergoes alkali activation and propylene oxide grafting reaction, precisely controlling the degree of hydroxypropyl substitution to 0.3-0.5, introducing hydrophilic groups, which increases the adsorption capacity of the bamboo fiber, reduces the loss rate of active ingredients to below 5%, and provides good facial adhesion. It avoids the problems of poor adsorption of essence and easy loss of essence components in traditional mask substrates. By utilizing the micropores and hydrophilicity of hydroxypropyl groups in the modified bamboo fiber substrate, the modified agarwood extract and ceramide NP component in the essence are bound to the fiber through hydrogen bonds, further reducing the loss of essence during the application of the modified bamboo fiber substrate.

[0045] Based on 100g of bamboo fiber, the following components are used: 40-60g of propylene oxide, 5-8g of 5% sodium hydroxide solution, and 1000g of 80% isopropanol solution. The mass ratio of bamboo fiber to 80% isopropanol solution is 1:10, the mass ratio of bamboo fiber to deionized water is 1:5, the mass ratio of bamboo fiber to 3% hydrogen peroxide solution is 1:8, and the mass ratio of bamboo fiber to 10% hydrochloric acid is 1:0.03.

[0046] The mass ratio of modified bamboo fiber substrate to essence is 1:10.

[0047] Comparative Example 1: The difference between this comparative example and Example 1 is that this example does not contain modified agarwood extract.

[0048] Comparative Example 2 differs from Example 1 in that it does not contain carboxymethylated modified hyaluronic acid.

[0049] Comparative Example 3 differs from Example 1 in that modified bamboo fiber substrate was not used in this example.

[0050] Performance testing: The relevant properties of the antioxidant repair masks containing agarwood extract provided in Examples 1-3 and Comparative Examples 1-3 were tested respectively, and the test data are recorded in the table below: Among them, the retention rate of active ingredients of antioxidant repair masks containing agarwood extract prepared by test method in GB / T35914-2018 Experiment 1, Experiment 2, Experiment 3, Comparative Example 1, Comparative Example 2 and Comparative Example 3 was tested. The DPPH free radical scavenging rate of the antioxidant repair masks containing agarwood extract prepared according to the test methods in GB / T39100-2020 were tested in Experiment 1, Experiment 2, Experiment 3, Comparative Example 1, Comparative Example 2 and Comparative Example 3. The skin hydration improvement rate of the antioxidant repair mask containing agarwood extract prepared according to the test methods in QB / T4256-2011 (Experiment 1, Experiment 2, Experiment 3, Comparative Example 1, Comparative Example 2 and Comparative Example 3) was tested.

[0051] By comparing and analyzing the relevant data in the table, it can be seen that the antioxidant repair mask containing agarwood extract prepared by this invention not only has a good retention rate of active ingredients and a high DPPH free radical scavenging rate, but also a good skin hydration improvement rate. This indicates that the preparation method of the antioxidant repair mask containing agarwood extract provided by this invention has a broader market prospect and is more suitable for promotion.

[0052] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0053] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An antioxidant and repairing facial mask containing agarwood extract, characterized in that, The product comprises an essence and a modified bamboo fiber substrate. The essence is composed of the following ingredients: 1.5 to 2.5 parts modified agarwood extract, 1 to 1.8 parts carboxymethylated modified hyaluronic acid, 0.6 to 0.9 parts ceramide NP, 1.1 to 1.7 parts ascorbate glucoside, 5.5 to 7 parts glycerin, 3.5 to 4.5 parts propylene glycol, 0.15 to 0.25 parts thickener, 0.12 to 0.18 parts preservative, and 78 to 86 parts deionized water. The preparation steps of the antioxidant repair mask containing agarwood extract are as follows: S1. Take deionized water, add glycerin and propylene glycol, stir at 40°C to form a moisturizing solvent base, slowly add thickener, stir at high speed for 10 minutes, and continue to keep warm at 40°C; S2. Take ceramide NP, add propylene glycol, stir in a 50°C water bath to form a ceramide pre-solution, slowly add it to the moisturizing solvent base, and continue stirring for 10 minutes; S3. Add the modified agarwood extract containing β-cyclodextrin and stir at 40°C for 15 minutes to rapidly disperse the extract by utilizing the water solubility of the inclusion complex. S4. Add carboxymethylated modified hyaluronic acid and stir at 35°C for 20 minutes to form a uniform colloid; S5. Cool to 30℃, add ascorbate glucoside, stir for 10 minutes until dissolved, and finally add preservative, stir for 5 minutes to mix well; S6. Transfer the mixture to a homogenizer, process for 5 minutes, then vacuum degas for 10 minutes to remove air bubbles and obtain an antioxidant and repairing synergistic essence. S7. The modified bamboo fiber substrate is sterilized with ultraviolet light for 15 minutes to remove microbial contamination. It is then transferred to a 25°C constant temperature mixing tank and stirred for 15 minutes. After standing for 10 minutes, the saturated modified bamboo fiber substrate is spread evenly in a sterile aluminum foil package and sealed to obtain an antioxidant repair mask containing agarwood extract.

2. The antioxidant repair mask containing agarwood extract according to claim 1, characterized in that: The preparation steps of the modified agarwood extract are as follows: sieve 200-mesh agarwood powder, add 8 times the mass of 70% ethanol solution, combine the extracts to obtain agarwood extract, weigh β-cyclodextrin according to the ratio, add deionized water, stir until β-cyclodextrin is completely dissolved to form a transparent β-cyclodextrin aqueous solution, add the pretreated agarwood extract to the β-cyclodextrin aqueous solution, stir for 30 minutes, transfer to an ultrasonic device for ultrasonic treatment for 20 minutes, continue stirring for 1 hour after ultrasonication, place the reaction solution in a refrigerator for 12 hours, centrifuge for 15 minutes, collect the precipitated agarwood extract inclusion complex crystals, wash twice with a small amount of anhydrous ethanol, dry to constant weight and pulverize to obtain a white powdery modified agarwood extract.

3. The antioxidant repair mask containing agarwood extract according to claim 2, characterized in that: The mass ratio of agarwood powder to β-cyclodextrin is 1:5, the mass ratio of the total mass of agarwood powder and β-cyclodextrin to deionized water is 1:10, and the mass ratio of agarwood extract inclusion complex crystals to anhydrous ethanol is 1:

2.

4. The antioxidant repair mask containing agarwood extract according to claim 1, characterized in that: The preparation steps of the carboxymethylated modified hyaluronic acid are as follows: weigh hyaluronic acid, add 80% ethanol aqueous solution, stir at room temperature for 30 minutes, slowly add sodium hydroxide powder, stir for 1 hour, add sodium chloroacetate according to the ratio, heat and stir at a constant temperature for 4 hours to allow the hyaluronic acid to react, adjust the pH with 10% hydrochloric acid, add 3 times the volume of anhydrous ethanol, stir and precipitate for 2 hours, centrifuge for 10 minutes, collect the hyaluronic acid precipitate, wash the hyaluronic acid precipitate 3 times with 80% ethanol aqueous solution, pulverize and pass through a 100-mesh sieve to obtain carboxymethylated modified hyaluronic acid.

5. The antioxidant repair mask containing agarwood extract according to claim 4, characterized in that: The mass ratio of hyaluronic acid, sodium chloroacetate, and sodium hydroxide is 1:2:1.5; the mass ratio of hyaluronic acid and hyaluronic acid precipitate to 80% ethanol aqueous solution is 1:15; and the mass ratio of hyaluronic acid to 10% hydrochloric acid is 1:0.

05.

6. The antioxidant repair mask containing agarwood extract according to claim 1, characterized in that: The thickener is xanthan gum, and the preservative is methylparaben.

7. The antioxidant repair mask containing agarwood extract according to claim 1, characterized in that: The mass ratio of the modified agarwood extract, ceramide NP, and ascorbate glucoside is 3:1:

2.

8. The antioxidant repair mask containing agarwood extract according to claim 1, characterized in that: The preparation steps of the modified bamboo fiber substrate are as follows: Take bamboo fiber, stir with 5% sodium hydroxide solution for 30 minutes to degrease and dewax, wash with deionized water, then sonicate with 3% hydrogen peroxide solution for 20 minutes, and dry to obtain clean bamboo fiber. Add 80% isopropanol to the clean bamboo fiber, stir to swell, add sodium hydroxide, stir again, add propylene oxide dropwise, seal and stir to react for 3 hours, add 10% hydrochloric acid, wash the bamboo fiber alternately with 80% isopropanol and deionized water, pre-dry for 1 hour, and then dry for 2 hours to form the modified bamboo fiber substrate.

9. The antioxidant repair mask containing agarwood extract according to claim 8, characterized in that: Based on 100g of bamboo fiber, the components are 40-60g of propylene oxide, 5-8g of 5% sodium hydroxide solution, and 1000g of 80% isopropanol solution. The mass ratio of bamboo fiber to 80% isopropanol solution is 1:10, the mass ratio of bamboo fiber to deionized water is 1:5, the mass ratio of bamboo fiber to 3% hydrogen peroxide solution is 1:8, and the mass ratio of bamboo fiber to 10% hydrochloric acid is 1:0.

03.

10. The antioxidant repair mask containing agarwood extract according to claim 1, characterized in that: The mass ratio of the modified bamboo fiber substrate to the essence is 1:10.

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