Composition containing agilawood essential oil and application of composition in air purification

Abstract

The invention belongs to the technical field of air purification, and particularly relates to a composition containing agilawood essential oil and application of the composition in air purification products. The aquilaria agallocha essential oil, the catechu extract, the hibiscus mutabilis extract and the chitosan are compounded into the air purification component, so that the composition containing the air purification component has remarkable and lasting formaldehyde and ammonia removal effects, and the problem that an existing air purification product is poor in odor removal effect and not lasting in odor removal effect can be solved. According to the preparation method of the agilawood essential oil, three extraction agents including absolute ethyl alcohol, acetone and diethyl ether are sequentially adopted for carrying out low-temperature continuous phase change extraction on agilawood powder, and the method has the advantages of being high in safety, high in extraction rate, easy to operate and capable of achieving all-around efficient extraction. The composition provided by the invention also has the advantages of simple and convenient preparation method, suitability for industrial production and the like, can be applied to preparation of air purification products, and has better application value.

Description

Technical Field

[0001] The present invention belongs to the technical field of air purification, and in particular relates to a composition containing agarwood essential oil and an application thereof in air purification. Background Art

[0002] Indoor air quality is crucial to human health, and with the development of society and improvements in living standards, people are paying increasing attention to indoor air quality. However, due to various factors, such as poor ventilation, odors inevitably accumulate, causing discomfort. Furthermore, unpleasant odors such as sweat, body odor, and cigarette smoke are common in everyday life, diminishing people's quality of life. These gases primarily include ammonia, nitrogen oxides, methylamine, organic sulfur, hydrogen sulfide, mercaptans, acetic acid, isovaleric acid, indole, acrolein, skatole, and methane. These substances irritate the senses, damage the living environment, and endanger human health. Therefore, using air purifiers with antiseptic and aromatic properties has become a popular choice.

[0003] Deodorants currently on the market can be categorized by their deodorization mechanisms: physical, chemical, microbial, and plant-based. Physical and chemical deodorizers primarily work through adsorption, masking, and neutralization. While these deodorizers are characterized by relatively fast reaction times, their effectiveness is short-lived, their processes are complex, and they are prone to secondary pollution. The greatest advantages of microbial deodorizers are their wide treatment range, high load capacity, low cost, non-toxicity, long-lasting effectiveness, and lack of secondary pollution. However, they typically do not produce the immediate deodorizing effect of chemical deodorizers. Plant-based deodorizers can convert toxins into non-toxic substances, but their preparation time is lengthy and their removal efficiency is low.

[0004] Agarwood, also known as Qinnan, Gannan, and Jialan, is a high-quality agarwood. Compared to ordinary agarwood, its main differences are its longer-lasting fragrance, softer texture, richer oil content, and higher extract yield and chromone content. Qi-Nan essential oil (QEO), the most important active ingredient in agarwood, exhibits multiple biological activities, including antibacterial, antioxidant, sedative, anti-inflammatory, and anti-cancer properties. It can effectively adsorb and decompose harmful substances in the air. Therefore, providing an air purification product based on Qi-Nan essential oil that achieves effective and long-lasting deodorization, safety, and environmental protection is an urgent need. Summary of the Invention

[0005] In response to the above defects or improvement needs of the prior art, the present invention provides a composition containing agarwood essential oil and its application in air purification, which solves the problem that the deodorizing effect of existing air purification products is poor and not long-lasting.

[0006] In a first aspect, the present invention provides a composition containing agarwood essential oil, comprising the following components in parts by weight: 20-25 parts of agarwood essential oil, 16-20 parts of catechu extract, 18-22 parts of hibiscus flower extract, 12-16 parts of chitosan, 5-9 parts of sodium D-isoascorbate, 1-4 parts of phenoxyethanol, 10-20 parts of sodium lauryl sulfate, 30-40 parts of anhydrous ethanol, 15-25 parts of glycerol, and 50-60 parts of deionized water.

[0007] In the present invention, the agarwood essential oil contains active ingredients such as sesquiterpenoid compounds, chromone compounds and flavonoid compounds. Therefore, the agarwood essential oil not only has a rich aroma, but also has anti-inflammatory, antibacterial, antioxidant, nerve-relieving, mood-regulating, adsorbent and other effects, and can effectively decompose toxic gases such as formaldehyde and ammonia.

[0008] Catechin contains chemical components such as catechins, epicatechins, tannins, flavonoids, quinones, and terpenoids. It has anti-cancer, antibacterial, blood sugar-lowering, antioxidant, anti-inflammatory, and adsorption or catalytic decomposition effects on volatile organic compounds in the air. Catechins, which have a phloroglucinol-type structure, are highly reactive with formaldehyde, making them excellent formaldehyde removers.

[0009] The main active ingredients of hibiscus are flavonoids, including flavonoid aglycones and their glycosides, such as kaempferol, quercetin, isorhamnetin, and cyanidin. These compounds have anti-inflammatory, analgesic, antibacterial, anti-allergic, antioxidant, hepatoprotective, and immunomodulatory properties. The phenolic hydroxyl and carbonyl groups in kaempferol and quercetin react with odorous substances such as ammonia. The carbonyl groups then undergo dehydration condensation with odorous substances such as sulfur-containing compounds to produce odorless substances, thereby purifying the air.

[0010] Chitosan (polyglucosamine (1-4)-2-amino-BD) is odorless and tasteless and is a product of N-deacetylation of chitin. Chitosan has excellent biodegradability, cell affinity and biological effects, adsorption, film-forming properties, permeability, fiber-forming properties, hygroscopicity and moisture retention.

[0011] Sodium D-isoascorbate is a derivative of vitamin C with strong reducing properties. As an antioxidant, it is highly stable and can inhibit oxidation reactions and extend shelf life.

[0012] Phenoxyethanol is a high-boiling-point, low-volatility solvent. As a low-allergenic preservative, it is soluble in both water and oil and is easy to use.

[0013] Sodium dodecyl sulfate, as a surfactant, maintains the stability of the system through electrostatic repulsion of like charges.

[0014] As a high-purity organic solvent, anhydrous ethanol has good solubility and can promote uniform mixing of other components in the composition to form a stable system.

[0015] Glycerol, also known as glycerin, can be used as a humectant to maintain the moisture content of the composition due to its strong hygroscopicity; it can also increase the viscosity of the composition and act as a thickener.

[0016] Deionized water, as a pure solvent, can dissolve water-soluble components. It is non-toxic, non-irritating, and will not cause secondary pollution.

[0017] Preferably, the composition comprises the following components in parts by weight: 22 parts of agarwood essential oil, 18 parts of catechu extract, 20 parts of hibiscus flower extract, 14 parts of chitosan, 7 parts of sodium D-isoascorbate, 3 parts of phenoxyethanol, 15 parts of sodium lauryl sulfate, 35 parts of anhydrous ethanol, 20 parts of glycerol, and 55 parts of deionized water.

[0018] Preferably, the preparation method of the agarwood essential oil comprises the following steps: taking dried agarwood powder and placing it in an extraction kettle, sequentially using anhydrous ethanol, acetone, and ether as extraction agents, and performing low-temperature continuous phase change extraction on the agarwood powder to obtain the agarwood essential oil.

[0019] The present invention adopts low-temperature continuous phase change extraction technology to extract agarwood powder. The agarwood powder is loaded into an extraction kettle, the extraction temperature and extraction pressure are set, the extractant is compressed into liquid, the extractant flows through the extraction kettle, and extraction is performed to obtain an extract; the extractant enters a decomposition kettle, the decomposition temperature and decomposition pressure are set, the extractant is heated and decompressed to become a gas, the extractant is separated from the extractant, and then condensed by condensed water to become a liquid and flow through the extraction kettle again, the extract is extracted and decomposed again, the extraction and decomposition conditions are the same as the previous extraction and decomposition conditions, after the extraction cycle reaches the continuous cycle extraction time, the extractant is heated and decompressed to become a gas, the extractant gas is recovered, and the extractant is collected.

[0020] Low-temperature continuous phase change extraction technology is an extraction technology independently developed on the basis of supercritical and subcritical extraction technologies. Its technical principle is to use the two-phase change of the extractant at different temperatures and pressures to perform continuous countercurrent extraction on the material. The extractant fully extracts the material in the form of a fluid under conditions below its critical temperature and pressure below the critical pressure, and the product is obtained by decompression evaporation and gasification separation. The gasified extraction solvent is compressed into a liquid and then returned to the system to realize continuous countercurrent extraction. The entire extraction process is carried out in a continuous cycle under closed, low-temperature and low-pressure conditions. The extractant can be recycled repeatedly, has low equipment requirements, and can minimize the loss of photosensitivity and heat-sensitive chemical components. It has the characteristics of high safety, high extraction rate, simple operation, good product quality, industrialization, and all-round efficient extraction.

[0021] Further preferably, when anhydrous ethanol is used as the extraction agent, the flow rate of anhydrous ethanol through the extraction kettle is 100-130 L / h, the extraction temperature of the extraction kettle is 55-65°C, the extraction pressure is 0.5-1.5 MPa, the decomposition temperature of the decomposition kettle is 65-75°C, the decomposition pressure is 0.1-0.3 MPa, and the continuous cycle extraction time is 45-65 min.

[0022] Further preferably, when acetone is used as the extraction agent, the flow rate of acetone flowing through the extraction kettle is 90-110 L / h, the extraction temperature of the extraction kettle is 45-55°C, the extraction pressure is 1.0-1.5 MPa, the decomposition temperature of the decomposition kettle is 60-70°C, the decomposition pressure is 0.2-0.6 MPa, and the continuous cycle extraction time is 30-50 min.

[0023] Further preferably, when diethyl ether is used as the extraction agent, the flow rate of diethyl ether through the extraction kettle is 120-140 L / h, the extraction temperature of the extraction kettle is 35-45°C, the extraction pressure is 0.8-1.2 MPa, the decomposition temperature of the decomposition kettle is 50-60°C, the decomposition pressure is 0.05-0.45 MPa, and the continuous cycle extraction time is 20-40 min.

[0024] In a second aspect, the present invention provides a method for preparing the composition of the first aspect, comprising the following steps:

[0025] S1, mixing catechu extract, hibiscus flower extract, chitosan, sodium D-isoascorbate, anhydrous ethanol and deionized water, and stirring uniformly to obtain a mixture I;

[0026] S2. Mix the agarwood essential oil, glycerol, phenoxyethanol, sodium lauryl sulfate and mixture I, and stir evenly to obtain the composition.

[0027] In a third aspect, the present invention provides use of the composition of the first aspect or the second aspect in preparing an air purification product.

[0028] Beneficial effects of the present invention:

[0029] The present invention provides a composition containing agarwood essential oil, the composition comprising agarwood essential oil, catechu extract, hibiscus flower extract and chitosan, wherein the agarwood essential oil, catechu extract, hibiscus flower extract as plant deodorants and chitosan as a biological deodorant are compounded to have a significant synergistic air purification effect, so that the composition has a significant and lasting formaldehyde and ammonia removal effect. The present invention adopts three extractants to perform low-temperature continuous phase change extraction on agarwood powder to obtain agarwood essential oil, which has the advantages of high safety, high extraction rate, simple operation, and all-round efficient extraction. The composition provided by the present invention also has the advantages of simple preparation method, suitability for industrial production, etc., can be used to prepare air purification products, and has good application value. DETAILED DESCRIPTION

[0030] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the following is a detailed description of the specific implementation methods, structures, features and effects of the present invention in combination with the composition.

[0031] For the following compositions, experimental methods where specific conditions are not specified were generally performed under conventional conditions or those recommended by the manufacturer. Materials and reagents used were commercially available unless otherwise specified.

[0032] Some of the raw materials and their sources are as follows:

[0033] Agarwood powder was purchased from Cuishi Agarwood Co., Ltd. in Dianbai District, Maoming City;

[0034] Catechu extract was purchased from Xi'an Guohao Biotechnology Co., Ltd.;

[0035] Hibiscus flower extract was purchased from Shaanxi Haochen Biotechnology Co., Ltd.;

[0036] Chitosan was purchased from Henan Bangrun Chemical Products Co., Ltd.

[0037] The components of the composition containing agarwood essential oil of the present invention are shown in Table 1 below:

[0038] Table 1 Components and weight percentages of the composition containing agarwood essential oil

[0039]

[0040] Preparation of Composition 1:

[0041] The specific steps of the preparation method of the agarwood essential oil are as follows:

[0042] The dried agarwood powder was placed in an extraction kettle, and anhydrous ethanol, which had changed into liquid form, was first passed through the extraction kettle at a flow rate of 120 L / h. The extraction temperature of the extraction kettle was 60°C and the extraction pressure was 1.0 MPa. The desorption temperature of the desorption kettle was 70°C and the desorption pressure was 0.2 MPa. The continuous cycle extraction time was 55 min. After the extraction was completed, the anhydrous ethanol was recovered.

[0043] The acetone that has changed into liquid state is then passed through the extraction kettle at a flow rate of 100 L / h. The extraction temperature of the extraction kettle is 50°C and the extraction pressure is 1.3 MPa. The desorption temperature of the desorption kettle is 65°C and the desorption pressure is 0.4 MPa. The continuous cycle extraction time is 40 minutes. After the extraction is completed, the acetone is recovered.

[0044] Finally, the ether that has changed into liquid state is passed through the extraction kettle at a flow rate of 130 L / h. The extraction temperature of the extraction kettle is 40°C and the extraction pressure is 1.0 MPa. The desorption temperature of the desorption kettle is 55°C and the desorption pressure is 0.25 MPa. The continuous cycle extraction time is 30 minutes. After the extraction is completed, the ether is recovered.

[0045] Collect the agarwood essential oil in the analysis kettle;

[0046] The preparation method of the composition 1 comprises the following steps:

[0047] S1, mixing catechu extract, hibiscus flower extract, chitosan, sodium D-isoascorbate, anhydrous ethanol and deionized water, and stirring uniformly to obtain a mixture I;

[0048] S2. Mix the agarwood essential oil, glycerol, phenoxyethanol, sodium lauryl sulfate and mixture I, and stir evenly to obtain the composition.

[0049] Preparation of Composition 2:

[0050] The specific steps of the preparation method of the agarwood essential oil are as follows:

[0051] The dried agarwood powder was placed in an extraction kettle, and anhydrous ethanol, which had changed into liquid form, was first passed through the extraction kettle at a flow rate of 130 L / h. The extraction temperature of the extraction kettle was 55°C and the extraction pressure was 1.5 MPa. The desorption temperature of the desorption kettle was 65°C and the desorption pressure was 0.1 MPa. The continuous cycle extraction time was 65 min. After the extraction was completed, the anhydrous ethanol was recovered.

[0052] The acetone that has changed into liquid state is then passed through the extraction kettle at a flow rate of 90 L / h. The extraction temperature of the extraction kettle is 55°C and the extraction pressure is 1.0 MPa. The desorption temperature of the desorption kettle is 70°C and the desorption pressure is 0.2 MPa. The continuous cycle extraction time is 50 minutes. After the extraction is completed, the acetone is recovered.

[0053] Finally, the ether that has changed into liquid state is passed through the extraction kettle at a flow rate of 140 L / h. The extraction temperature of the extraction kettle is 35°C and the extraction pressure is 1.2 MPa. The desorption temperature of the desorption kettle is 50°C and the desorption pressure is 0.45 MPa. The continuous cycle extraction time is 40 minutes. After the extraction is completed, the ether is recovered.

[0054] Collect the agarwood essential oil in the analysis kettle;

[0055] The preparation method of the composition 2 comprises the following steps:

[0056] S1, mixing catechu extract, hibiscus flower extract, chitosan, sodium D-isoascorbate, anhydrous ethanol and deionized water, and stirring uniformly to obtain a mixture I;

[0057] S2. Mix the agarwood essential oil, glycerol, phenoxyethanol, sodium lauryl sulfate and mixture I, and stir evenly to obtain the composition.

[0058] Preparation of Composition 3:

[0059] The specific steps of the preparation method of the agarwood essential oil are as follows:

[0060] The dried agarwood powder was placed in an extraction kettle, and anhydrous ethanol that had changed into liquid state was first passed through the extraction kettle at a flow rate of 100 L / h. The extraction temperature of the extraction kettle was 65°C and the extraction pressure was 0.5 MPa. The desorption temperature of the desorption kettle was 75°C and the desorption pressure was 0.3 MPa. The continuous cycle extraction time was 45 min. After the extraction was completed, the anhydrous ethanol was recovered.

[0061] The acetone that has changed into liquid state is then passed through the extraction kettle at a flow rate of 110 L / h. The extraction temperature of the extraction kettle is 45°C and the extraction pressure is 1.5 MPa. The desorption temperature of the desorption kettle is 60°C and the desorption pressure is 0.6 MPa. The continuous cycle extraction time is 30 minutes. After the extraction is completed, the acetone is recovered.

[0062] Finally, the ether that has changed into liquid state is passed through the extraction kettle at a flow rate of 120 L / h. The extraction temperature of the extraction kettle is 45°C and the extraction pressure is 0.8 MPa. The desorption temperature of the desorption kettle is 60°C and the desorption pressure is 0.05 MPa. The continuous cycle extraction time is 20 minutes. After the extraction is completed, the ether is recovered.

[0063] Collect the agarwood essential oil in the analysis kettle;

[0064] The preparation method of the composition 3 comprises the following steps:

[0065] S1, mixing catechu extract, hibiscus flower extract, chitosan, sodium D-isoascorbate, anhydrous ethanol and deionized water, and stirring uniformly to obtain a mixture I;

[0066] S2. Mix the agarwood essential oil, glycerol, phenoxyethanol, sodium lauryl sulfate and mixture I, and stir evenly to obtain the composition.

[0067] Composition ①: Compared with composition 1, the only difference is that no agarwood essential oil is added to composition ①, and the missing amount is supplemented by catechu extract, hibiscus flower extract and chitosan in a weight ratio of 18:20:14. Other conditions are the same as composition 1.

[0068] Composition ②: Compared with composition 1, the only difference is that catechu extract is not added to composition ②, and the missing amount is supplemented by agarwood essential oil, hibiscus flower extract and chitosan in a weight ratio of 22:20:14. Other conditions are the same as composition 1.

[0069] Composition ③: Compared with composition 1, the only difference is that hibiscus flower extract is not added to composition ③, and the missing amount is supplemented by agarwood essential oil, catechu extract and chitosan in a weight ratio of 22:18:14. Other conditions are the same as composition 1.

[0070] Composition ④: Compared with composition 1, the only difference is that chitosan is not added to composition ④, and the missing amount is supplemented by agarwood essential oil, catechu extract and hibiscus flower extract in a weight ratio of 22:18:20. Other conditions are the same as composition 1.

[0071] Composition ⑤: Compared with composition 1, the only difference is the preparation of the agarwood essential oil in composition ⑤. Only anhydrous ethanol is used to perform low-temperature continuous phase change extraction of the agarwood powder. The flow rate of anhydrous ethanol through the extraction kettle is 120 L / h, the extraction temperature of the extraction kettle is 60 ° C, and the extraction pressure is 1.0 MPa. The decomposition temperature of the decomposition kettle is 70 ° C, and the decomposition pressure is 0.2 MPa. The continuous cycle extraction time is 125 min. The other conditions are the same as those of composition 1.

[0072] Composition ⑥: Compared with composition 1, the only difference is the preparation of the agarwood essential oil in composition ⑥. Only acetone is used to perform low-temperature continuous phase change extraction of the agarwood powder. The flow rate of acetone through the extraction kettle is 100 L / h, the extraction temperature of the extraction kettle is 50 ° C, and the extraction pressure is 1.3 MPa. The decomposition temperature of the decomposition kettle is 65 ° C, and the decomposition pressure is 0.4 MPa. The continuous cycle extraction time is 125 min. The other conditions are the same as those of composition 1.

[0073] Composition ⑦: Compared with composition 1, the only difference is the preparation of the agarwood essential oil in composition ⑦. Only ether is used to perform low-temperature continuous phase change extraction of the agarwood powder. The flow rate of ether through the extraction kettle is 130 L / h, the extraction temperature of the extraction kettle is 40 ° C, and the extraction pressure is 1.0 MPa. The decomposition temperature of the decomposition kettle is 55 ° C, and the decomposition pressure is 0.25 MPa. The continuous cycle extraction time is 125 min. Other conditions are the same as composition 1.

[0074] Effect Example 1

[0075] This test was conducted in accordance with the standard QB / T 2761-2006 "Method for Determining the Purification Effect of Indoor Air Purification Products" to detect the removal effect of the composition prepared by the present invention on formaldehyde and ammonia after being placed for 0 days and 6 months.

[0076] Formaldehyde is a major indoor air pollutant, characterized by widespread pollution, wide impact, and long duration. It has been classified as a Group 1 human carcinogen by the International Agency for Research on Cancer. Ammonia, a colorless gas with a strong pungent odor, is a control indicator in multiple indoor air quality (IAQ) standards and limit standards established in my country.

[0077] The test method is as follows: 2 The test substances (compositions 1-3 and compositions prepared from groups ①-⑦) were sprayed three times on the base papers (using a small spray pump to spray as fine a mist as possible), with three base papers in each group; the first spraying was allowed to dry before the second spraying, and the second spraying was allowed to dry before the third spraying (amount of spray material used: 100 g);

[0078] Five layers of 17cm×40cm medical absorbent gauze were rolled up on two glass holders with a diameter of 5mm and a length of 30cm, fixed with cotton thread and placed upright in a 500mL reagent bottle, and 200mL of pollutants were loaded, with concentrations of 0.2% formaldehyde and 0.06% ammonia respectively; two air test chambers (A is a blank chamber and B is a sample chamber) were used, and the untreated base paper was hung in the blank test chamber A, and the base paper sprayed with the test object was hung in the test chamber B; the containers containing the prepared pollutants were placed in the blank chamber A and the sample chamber B respectively, and the chamber doors were immediately closed. The fans of the A and B chambers were turned on and stirred for 1min. After the air in the chamber was mixed with the release source pollutants, the fans were turned off, and the air in the blank test chamber was sampled. The pollutant concentration in the air in the blank chamber was determined to be the initial concentration, which was recorded as C0; after 24h, the concentrations of the air pollutants in the two chambers were sampled and measured, which was recorded as C A with C BSampling and analysis were carried out in accordance with the methods specified in GB / T 18883. The detection method for the pollutant formaldehyde was carried out in accordance with GB / T 18204.26-2000. The detection of formaldehyde was carried out in accordance with GB / T 18883-2002. After the compositions 1-3 and compositions ①-⑦ were sealed and placed at room temperature for 6 months, the above performance test was conducted again.

[0079] The pollutant removal rate of passive purification materials can be calculated as follows:

[0080]

[0081] Where:

[0082] y——removal rate, %;

[0083] C A ——Concentration of pollutants in the blank test chamber, mg / m 3 ;

[0084] C B ——Concentration of pollutants in the sample test chamber, mg / m 3 .

[0085] The test results are shown in Table 2. The compositions prepared by composition groups 1-3 had formaldehyde and ammonia removal rates of up to 99% when placed for 0 days and 6 months, indicating that the air purification effect is excellent and long-lasting; the compositions prepared by composition groups ①-⑦ had formaldehyde and ammonia removal rates lower than those of composition groups 1-3 when placed for 0 days and 6 months, indicating that the components of agarwood essential oil, catechu extract, hibiscus flower extract and chitosan in the composition, as well as the type of extractant for continuous phase change extraction in the preparation method of agarwood essential oil, will affect the purification effect of the prepared composition.

[0086] Specifically, compared with composition 1, compositions ①-④ do not add one of the agarwood essential oil, catechu extract, hibiscus flower extract and chitosan, respectively, and the compositions prepared by compositions ①-④ have lower formaldehyde and ammonia removal rates than composition 1 group at 0 days and 6 months, indicating that there is a synergistic effect between agarwood essential oil, catechu extract, hibiscus flower extract and chitosan, thereby improving the air purification effect. Compared with composition 1, composition ⑤ uses only anhydrous ethanol to extract agarwood essential oil, composition ⑥ uses only acetone to extract agarwood essential oil, and composition ⑦ uses only ether to extract agarwood essential oil. The removal rates of formaldehyde and ammonia of compositions ⑤-⑦ at 0 days and 6 months are lower than those of composition 1, indicating that in the preparation of agarwood essential oil, the type of extractant directly affects the type and content of the active ingredients of the essential oil, thereby affecting the effect of removing formaldehyde and ammonia. The formaldehyde and ammonia removal rates of compositions 1-3 and ⑤-⑦ on day 0 were compared with those after 6 months, and the air purification effect after 6 months did not change significantly. However, the formaldehyde and ammonia removal rates of compositions ①-④ on day 0 were compared with those after 6 months, and the air purification effect after 6 months was significantly worse, indicating that the composition prepared by using agarwood essential oil, catechu extract, hibiscus flower extract and chitosan in the present invention has excellent and long-lasting air purification effect.

[0087] In summary, the present invention not only optimizes the preparation method of agarwood essential oil, but also adopts low-temperature continuous phase change extraction technology, which has the advantages of high safety, high extraction rate, simple operation, and all-round efficient extraction; it also uses agarwood essential oil, catechu extract, hibiscus flower extract and chitosan as air purification components, so that the formaldehyde and ammonia removal effects of the composition are significantly improved and the effects are long-lasting.

[0088] Table 2 Purification effect test results

[0089]

[0090] Effect Example 2

[0091] Test substance: the composition prepared in composition groups 1-3;

[0092] Conduct multiple complete skin irritation tests in accordance with the 2002 edition of the Technical Specifications for Disinfection;

[0093] Experimental animals: New Zealand rabbits, weighing 2.2-2.8 kg, with two healthy adult New Zealand rabbits per group, half male and half female; fed with standard feed, kept in single cages under pathogen-free conditions at a constant temperature of 23-28°C and a relative humidity of 50%-60%.

[0094] Detection method: 24 hours before the test, remove the hair on both sides of the spine of the New Zealand rabbit's back with a depilatory agent without damaging the skin; the depilatory area is approximately 3cm×3cm on the left and right sides; the next day, drop 0.5mL of the test substance directly on the intact depilated skin on one side with an area of 2.5cm×2.5cm, then cover it with a layer of non-irritating plastic film or oil paper, and finally fix it with non-irritating adhesive tape; apply sterile water to the other side as a control, and wash it with water 4 hours after application to remove the residue; apply once a day for 14 consecutive days; observe the results 24 hours after application on the first and last days, and score according to Table 3; in order to facilitate the application of the test substance and the observation of the results, the hair should be sheared if necessary; the treatment method of the control area is the same as that of the test area; calculate the average score (irritation index) of each New Zealand rabbit per day according to the following formula, and determine the skin irritation intensity according to Table 4.

[0095] Test results: As shown in Table 5, the animal skin irritation reaction intensity of compositions 1-3 was non-irritating, indicating that the compositions prepared by the present invention are mild and non-irritating.

[0096] Table 3 Scoring criteria for skin irritation reactions

[0097]

[0098] Table 4 Skin irritation intensity classification

[0099]

[0100]

[0101] Table 5 Irritation test results

[0102]

[0103] The above description is merely a preferred composition of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred composition as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent compositions using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above compositions based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A composition containing agarwood essential oil, characterized in that: The invention comprises the following components in parts by weight: 20-25 parts of agarwood essential oil, 16-20 parts of catechu extract, 18-22 parts of hibiscus flower extract, 12-16 parts of chitosan, 5-9 parts of sodium D-isoascorbate, 1-4 parts of phenoxyethanol, 10-20 parts of sodium lauryl sulfate, 30-40 parts of anhydrous ethanol, 15-25 parts of glycerol, and 50-60 parts of deionized water; The preparation method of the agarwood essential oil comprises the following steps: placing dried agarwood powder in an extraction kettle, sequentially using anhydrous ethanol, acetone, and ether as extractants to perform low-temperature continuous phase change extraction on the agarwood powder to obtain the agarwood essential oil.

2. The composition according to claim 1, characterized in that The composition comprises the following components in parts by weight: 22 parts of agarwood essential oil, 18 parts of catechu extract, 20 parts of hibiscus flower extract, 14 parts of chitosan, 7 parts of sodium D-isoascorbate, 3 parts of phenoxyethanol, 15 parts of sodium lauryl sulfate, 35 parts of anhydrous ethanol, 20 parts of glycerol, and 55 parts of deionized water.

3. The composition according to claim 1, characterized in that When anhydrous ethanol is used as the extraction agent, the flow rate of anhydrous ethanol flowing through the extraction kettle is 100-130 L / h, the extraction temperature of the extraction kettle is 55-65°C, the extraction pressure is 0.5-1.5 MPa, the decomposition temperature of the decomposition kettle is 65-75°C, the decomposition pressure is 0.1-0.3 MPa, and the continuous cycle extraction time is 45-65 min.

4. The composition according to claim 1, characterized in that When acetone is used as the extraction agent, the flow rate of acetone flowing through the extraction kettle is 90-110 L / h, the extraction temperature of the extraction kettle is 45-55°C, the extraction pressure is 1.0-1.5 MPa, the decomposition temperature of the decomposition kettle is 60-70°C, the decomposition pressure is 0.2-0.6 MPa, and the continuous cycle extraction time is 30-50 min.

5. The composition according to claim 1, characterized in that When diethyl ether is used as the extractant, the flow rate of diethyl ether flowing through the extraction kettle is 120-140 L / h, the extraction temperature of the extraction kettle is 35-45°C, the extraction pressure is 0.8-1.2 MPa, the decomposition temperature of the decomposition kettle is 50-60°C, the decomposition pressure is 0.05-0.45 MPa, and the continuous cycle extraction time is 20-40 min.

6. A method for preparing a composition containing agarwood essential oil according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1, mixing catechu extract, hibiscus flower extract, chitosan, sodium D-isoascorbate, anhydrous ethanol and deionized water, and stirring uniformly to obtain a mixture I; S2. Mix the agarwood essential oil, glycerol, phenoxyethanol, sodium lauryl sulfate and mixture I, and stir evenly to obtain the composition.

7. Use of the composition containing agarwood essential oil according to any one of claims 1 to 5 or the composition prepared by the preparation method according to claim 6 in the preparation of an air purification product.

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