Non-toxic air freshener with mosquito repelling function

Abstract

The invention relates to a non-toxic air freshener with a mosquito repelling function. The non-toxic air freshener comprises the following raw material components: 3%-25% of mosquito-repelling adsorption particles and 75%-97% of a colloid compound, wherein the mosquito-repelling adsorption particles are prepared from wormwood, citronella, pogostemon cablin and coffee grounds. According to the technical scheme, mosquito-repelling active ingredients with mosquito repelling, deodorization and fragrance functions can be slowly released, and the fragrance emitting time and the mosquito repelling time are effectively prolonged; in addition, the emission content of mosquito-repellent active ingredients emitted into the air is low, side effects on human bodies are small, and the mosquito-repellent incense is suitable for infants and skin-sensitive people to use.

Description

Technical Field

[0001] The present application relates to the technical field of daily chemical products, and in particular to a non-toxic air freshener with mosquito repellent function. Background Art

[0002] There are many kinds of mosquito repellent products on the market, such as mosquito coils, mosquito coil liquid, and some odor agents such as air fresheners. Although the ingredients are different, the principles are roughly the same: the mosquito repellent ingredients interfere with the mosquito's sense of smell or nervous system, and cover up the odor signals such as amino acids, lactic acid, carbon dioxide, etc. emitted by the human body, causing mosquitoes to lose their ability to judge and unable to locate the target.

[0003] Among them, the widely used mosquito repellent active ingredients are mainly DEET, pyrethroids, picaridin, etc. The main active ingredients in these products are all pesticides and have low toxicity. When their content is low, they do not cause obvious harm to the human body, but they are prone to allergies or poisoning in infants and children and people with sensitive skin; and when the content is low, there is a problem of poor mosquito repellent effect. Therefore, it is necessary to develop a non-toxic air freshener with mosquito repellent effect suitable for infants and children and people with sensitive skin. Summary of the invention

[0004] In order to solve or partially solve the problems existing in the related art, the present application provides a non-toxic air freshener with mosquito repellent function, which can slowly release mosquito repellent active ingredients with mosquito repellent, deodorization and fragrance, effectively prolonging the fragrance dispersion time and mosquito repellent time; the mosquito repellent active ingredients emitted into the air have a low emission content and little side effects on the human body, and are suitable for use by infants and people with sensitive skin.

[0005] The present application provides a non-toxic air freshener with mosquito repellent function, comprising the following raw materials: 3%-25% of mosquito repellent adsorption particles and 75%-97% of a colloid compound;

[0006] The mosquito repellent adsorption particles are made of wormwood, citronella, patchouli and coffee grounds.

[0007] In some optional embodiments, the mass ratio of the mugwort, citronella, patchouli and coffee grounds is (10-50): (10-50): (0.1-0.3): (1-5).

[0008] In some optional embodiments, the colloidal complex consists of carrageenan and sodium carboxymethyl cellulose, wherein the carrageenan accounts for 50%-75% of the total mass of the colloidal complex.

[0009] In some optional embodiments, the steps of preparing the mosquito repellent adsorbent particles include:

[0010] 1) taking wormwood, citronella, patchouli and coffee grounds respectively and performing steam distillation through a distiller to obtain wormwood essential oil, citronella essential oil, patchouli essential oil and coffee essential oil and distillation residue;

[0011] 2) mixing, drying and sieving the distillation residues to obtain plant particles;

[0012] 3) mixing the plant particles, titanium dioxide, zinc oxide and sodium carboxymethyl cellulose and spraying and granulating them to obtain adsorption particles;

[0013] 4) heat-treating the adsorbed particles to obtain plant carbon particles;

[0014] 5) The plant carbon particles are mixed with wormwood essential oil, citronella essential oil, patchouli essential oil and coffee essential oil in proportion until the essential oil is completely adsorbed to obtain mosquito repellent adsorption particles.

[0015] In some optional embodiments, the mass ratio of the plant particles, titanium dioxide, zinc oxide and sodium carboxymethyl cellulose is (50-80):(1-5):(1-5):(15-50).

[0016] In some optional embodiments, the particle size of the plant particles is 50-75 μm, and the particle size of the titanium dioxide and zinc oxide is less than 1 μm.

[0017] In some optional embodiments, the temperature of the heat treatment of the adsorbent particles is 250-450° C., and the treatment time is 1-2 hours.

[0018] In some optional embodiments, the mass ratio of the plant carbon particles to mugwort essential oil, citronella essential oil, patchouli essential oil and coffee essential oil is 100:(1-3):(1-3):(0.1-0.3):(0.5-1).

[0019] In some optional embodiments, the step 5) includes:

[0020] Mugwort essential oil, citronella essential oil, patchouli essential oil and coffee essential oil are mixed in proportion, part of the mixed essential oil is mixed with plant carbon particles, and the plant carbon particles adsorb the mixed essential oil; after the plant carbon particles are dried, part of the mixed essential oil is added again, and the plant carbon particles adsorb the mixed essential oil; this process is repeated multiple times until the mixed essential oil is completely adsorbed to obtain mosquito repellent adsorption particles.

[0021] In some optional embodiments, the specific surface area of ​​the plant carbon particles is 85-120 m 2 / g.

[0022] The technical solution provided by this application may have the following beneficial effects:

[0023] The present application scheme can not only slowly release mosquito repellent active ingredients with mosquito repellent, deodorization and fragrance through mosquito repellent adsorption particles, but also effectively prolong the fragrance dispersion time and mosquito repellent time. At the same time, since the mosquito repellent adsorption particles are made of natural plant materials, they have good mosquito repellent effects and are environmentally friendly natural compounds, which can not only reduce the use of synthetic compounds, protect crops and the environment, and cause less damage and pollution to the ecological environment, but also save a lot of costs in synthesis; and they are all natural plant materials that are not easy to cause human allergies or poisoning, etc., and they are in the form of mosquito repellent adsorption particles. The mosquito repellent active ingredients emitted into the air are low in emission content, non-toxic or less toxic, and have little side effects on the human body, and are suitable for use by infants and people with sensitive skin.

[0024] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. DETAILED DESCRIPTION

[0025] To make the present invention easy to understand, the present invention will be described in detail below. However, before describing the present invention in detail, it should be understood that the present invention is not limited to the specific embodiments described. It should also be understood that the terms used herein are only for describing specific embodiments and are not intended to be limiting.

[0026] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0027] Where a numerical range is provided, it is to be understood that each intermediate value between the upper and lower limits of the range and any other provisions or intermediate values ​​in the specified range is encompassed within the present invention. The upper and lower limits of these smaller ranges may be independently included in the smaller ranges and are also encompassed within the present invention, subject to any explicitly excluded limits in the specified range. Where a specified range includes one or two limits, the scope excluding any or both of those included limits is also encompassed within the present invention. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically limited.

[0028] Unless otherwise defined, all terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the invention belongs. Although any methods and materials or equivalent methods and materials described herein can also be used in the practice or testing of the present invention, preferred methods and materials are now described.

[0029] Currently, the commonly used active ingredients for mosquito repellents are DEET, pyrethroids, picaridin, etc. The main active ingredients in these products are all pesticides and have low toxicity. When their content is low, they do not cause obvious harm to the human body, but infants and children and people with sensitive skin are prone to allergies or poisoning to these synthetic compounds, such as causing children to suffer from urticaria, rashes, toxic encephalopathy, etc., and these synthetic compounds cannot be degraded in the natural environment, so they will cause irreversible damage to the ecosystem; and when the content is low, there is a problem of poor mosquito repellent effect.

[0030] In view of the above problems, the embodiment of the present application provides a non-toxic air freshener with mosquito repellent function, which includes the following raw materials: 3%-25% of mosquito repellent adsorption particles and 75%-97% of colloidal complexes; wherein the mosquito repellent adsorption particles are made of wormwood, lemongrass, patchouli and coffee grounds. The mosquito repellent adsorption particles can not only slowly release mosquito repellent active ingredients with mosquito repellent, deodorization and fragrance, but also effectively prolong the fragrance dispersion time and mosquito repellent time. At the same time, since the mosquito repellent adsorption particles are made of natural plant materials, they have good mosquito repellent effects and are environmentally friendly natural compounds, which can not only reduce the use of synthetic compounds, protect crops and the environment, but also save a lot of costs in synthesis; and they are all natural plant materials that are not easy to cause human allergies or poisoning, etc., and they are in the form of mosquito repellent adsorption particles. The mosquito repellent active ingredients emitted into the air have a low emission content, are non-toxic or less toxic, have little side effects on the human body, are suitable for use by infants and people with sensitive skin, and have little damage and pollution to the ecological environment.

[0031] In some embodiments, the mass ratio of wormwood, citronella, patchouli and coffee grounds is (10-50): (10-50): (0.1-0.3): (1-5). Among them, wormwood, citronella and patchouli have chemical components such as volatile oils, flavonoids, alkaloids, such as α-pinene, eugenol, eugenol, terpinene, citronellal, citronellol, camphor, thymol, etc., which not only have special fragrance, can refresh the air and purify the space, but also can play a role in repelling mosquitoes. They are also pure natural Chinese herbal medicines. The products are green and natural, sustainable, and environmentally friendly and safe. At the same time, patchouli essential oil also plays the role of a stabilizer, which can effectively delay the release rate of other essential oil molecules, so that the fragrance of the air freshener lasts longer. Coffee grounds are rich in volatile oils such as esters and aldehydes, as well as chemical components such as organic acids, inorganic acids, alkaloids, and have a special aroma. When used with wormwood, citronella, and patchouli, they can increase the richness of the aroma of the air freshener and neutralize the irritating smell of wormwood, citronella, and patchouli, making the air freshener have a softer aroma; they can also repel mosquitoes and insects. In addition, the mosquito repellent adsorption particles made of coffee grounds have the characteristics of multiple pores and large specific surface area, which are conducive to the adsorption of odor molecules in the environment and play the role of a deodorant.

[0032] In some embodiments, the colloidal complex is composed of carrageenan and sodium carboxymethyl cellulose, wherein the carrageenan accounts for 50%-75% of the total mass of the colloidal complex, specifically 50%, 55%, 60%, 65%, 70%, 75%, etc., or any value within the above range. The colloidal complex formed by the combined use of carrageenan and sodium carboxymethyl cellulose has the effect of promoting the solidification of the colloid, and the combination of the two makes the formed solid air freshener have good formability and shape retention. Moreover, the solid air freshener uses granular mosquito repellent adsorption particles as carriers of mosquito repellent active ingredients and aroma components. When it is mixed with the colloidal complex to form a solid colloid, the colloidal complex further wraps the mosquito repellent active ingredients and aroma components of the mosquito repellent adsorption particles, which can further extend the mosquito repellent time and fragrance retention time of the air freshener, and the granular powdery mosquito repellent adsorption particles can also play a role in filling the solid colloid, acting as a filler, so that the air freshener has a more stable form.

[0033] In some embodiments, the steps of preparing mosquito repellent adsorbent particles include:

[0034] 1) taking wormwood, citronella, patchouli and coffee grounds respectively and performing steam distillation through a distiller to obtain wormwood essential oil, citronella essential oil, patchouli essential oil and coffee essential oil and distillation residue;

[0035] 2) mixing, drying and sieving the distillation residues to obtain plant particles;

[0036] 3) mixing the plant particles, titanium dioxide, zinc oxide and sodium carboxymethyl cellulose and spraying and granulating them to obtain adsorption particles;

[0037] 4) heat-treating the adsorbed particles to obtain plant carbon particles;

[0038] 5) The plant carbon particles are mixed with wormwood essential oil, citronella essential oil, patchouli essential oil and coffee essential oil in proportion until the essential oil is completely adsorbed to obtain mosquito repellent adsorption particles.

[0039] In the embodiment of the present application, each essential oil component is obtained by distilling and extracting wormwood, lemongrass, patchouli and coffee grounds, and then each essential oil component is adsorbed in the distillation waste residue biochar produced in the process of extracting essential oils from wormwood, lemongrass, patchouli and coffee, which not only realizes the reuse of distillation waste residue and reduces the waste of raw materials, but also can reuse the effective molecules remaining in the distillation waste residue, and maximize the use of natural plant mosquito repellent materials. At the same time, the plant carbon particles obtained after heat treatment also have the special aroma emitted by wormwood, lemongrass, patchouli and coffee after heat treatment, which can further increase the fragrance richness of the mosquito repellent adsorption particles.

[0040] The mosquito repellent adsorption particles also include titanium dioxide and zinc oxide. When the mosquito repellent adsorption particles adsorb odor molecules, formaldehyde molecules and other components in the environment that are not good for human health or reduce people's comfort and pleasure, they can react with these components to decompose these components, thereby achieving a deodorizing effect; and plant particles with a good specific surface area can well achieve the deposition of titanium dioxide and zinc oxide, so that titanium dioxide and zinc oxide are evenly distributed on the surface of the plant particles. At the same time, sodium carboxymethyl cellulose can combine titanium dioxide and zinc oxide with the plant particles, so that titanium dioxide and zinc oxide are stably distributed on the surface of the plant particles, so that the obtained adsorption particles have good adsorption and deodorizing effects.

[0041] Furthermore, the specific surface area of ​​the adsorption particles after heat treatment is further increased, and the adsorption effect on essential oils is good, and the adsorption of essential oils can be achieved quickly. When used, the adsorption effect on odor molecules, formaldehyde and other molecules is good, and it has a special fragrance, which can further enrich the fragrance of the solid air freshener. After heat treatment, the photocatalyst molecules such as titanium dioxide and zinc oxide are catalyzed, which has a better effect of decomposing odor molecules.

[0042] In step 1), the wormwood, lemongrass, patchouli and coffee grounds are respectively subjected to steam distillation in a mass ratio of (10-50):(10-50):(0.1-0.3):(1-5).

[0043] In step 1), the wormwood is first cleaned and freeze-dried, crushed, and passed through a 120-mesh sieve to obtain wormwood powder, water is added to immerse the wormwood powder in water, and after soaking for 24 hours, it is placed in a steam distillation device for distillation at a distillation temperature of (110±2)°C. After distillation for 2 hours, separation is performed to obtain wormwood essential oil and wormwood distillation residue.

[0044] In step 1), the citronella is first cleaned and freeze-dried, then crushed and passed through a 120-mesh sieve to obtain citronella powder, water is added to immerse the citronella powder in water, and after soaking for 32 hours, the powder is placed in a steam distillation device for distillation at a distillation temperature of (120±2)° C. After distillation for 3 hours, the powder is separated to obtain citronella essential oil.

[0045] In step 1), the patchouli is first cleaned and freeze-dried, then crushed and passed through a 120-mesh sieve to obtain patchouli powder, water is added to immerse the patchouli powder in water, and after soaking for 24 hours, the patchouli powder is placed in a steam distillation apparatus for distillation at a distillation temperature of (110±2)° C. After distillation for 2 hours, the patchouli essential oil is separated and obtained.

[0046] In step 1), the coffee grounds are first freeze-dried, crushed, and passed through a 120-mesh sieve to obtain coffee grounds powder, water is added to immerse the coffee grounds powder in water, and after soaking for 32 hours, the coffee grounds powder is placed in a steam distillation device for distillation at a distillation temperature of (130±2)° C. After distillation for 3 hours, the coffee grounds powder is separated to obtain coffee essential oil.

[0047] In step 2), the wormwood distillation residue, the citronella distillation residue, the patchouli distillation residue, and the coffee distillation residue are mixed and dried at 70-85° C., and then the plant particles with a particle size of 50-75 μm are sieved again.

[0048] In step 3), the plant particles, titanium dioxide, zinc oxide and sodium carboxymethyl cellulose are mixed and sprayed to obtain adsorption particles. The photocatalyst can be fixed on the surface of the plant particles by sodium carboxymethyl cellulose, so that the air freshener not only has the functions of repelling mosquitoes and refreshing the air, but also can decompose the adsorbed odor molecules, formaldehyde molecules and other molecular compounds that are harmful to human health, thereby playing the role of deodorization and formaldehyde removal.

[0049] The mass ratio of plant particles, titanium dioxide, zinc oxide and sodium carboxymethyl cellulose is (50-80): (1-5): (1-5): (15-50). If the content of photocatalyst titanium dioxide and zinc oxide is too low, it will not achieve the effect of long-lasting deodorization and formaldehyde removal; if the content of photocatalyst is too high, the cost will be too high, and the coverage rate on the surface of plant particles will be too high, which will easily affect the adsorption effect of plant particles. The use of appropriate content of sodium carboxymethyl cellulose as a cross-linking agent can not only well achieve the purpose of fixing the photocatalyst on the surface of plant particles, but also the coating on the surface of plant particles can form adsorption particles with more pore sizes as water evaporates after heat treatment, further increasing the specific surface area of ​​the adsorption particles.

[0050] The particle size of the plant particles in step 3) is 50-75 μm, for example, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, etc., or any value within the above range. The particle size of titanium dioxide and zinc oxide is less than 1 μm. By adjusting the particle size of the plant particles and the photocatalyst, titanium dioxide and zinc oxide can be evenly dispersed and deposited on the surface of the plant particles, so that each plant particle has a good deodorizing and formaldehyde removal effect.

[0051] Furthermore, in step 3), the mass ratio of titanium dioxide to zinc oxide is (1-3): 1; preferably 3: 1. Zinc oxide not only acts as a photocatalyst, but also has the effect of promoting titanium dioxide to decompose odor molecules, formaldehyde molecules, etc., and adjusting the mass ratio of titanium dioxide to zinc oxide within this range can enable the two to synergistically exert a better deodorization and formaldehyde removal effect.

[0052] In step 4), the heat treatment temperature of the adsorption particles is 250-450° C., and the treatment time is 1-2 hours. By adjusting the heat treatment temperature and time of the adsorption particles, the adsorption particles can be well dehydrated, the specific surface area of ​​the plant carbon particles can be increased, thereby improving its adsorption performance, and the plant carbon particles can also retain the special fragrance of each mosquito repellent material therein, thereby improving the mosquito repellent effect and fragrance retention effect of the mosquito repellent adsorption particles.

[0053] The specific surface area of ​​the plant carbon particles obtained after heat treatment is 85-120m 2 / g. Plant carbon particles with high specific surface area can efficiently adsorb essential oils.

[0054] In step 5), wormwood essential oil, citronella essential oil, patchouli essential oil and coffee essential oil are first mixed in proportion and then added to plant carbon particles for essential oil adsorption, so that the mixing of each essential oil can be achieved before adsorption, so that the mixing effect of each essential oil is good, the aroma molecule fusion effect is good, and the essential oil adsorbed on the plant carbon particles has a softer aroma. At the same time, patchouli essential oil and coffee essential oil can also play the role of stabilizer, which can prevent the mosquito repellent active ingredients and aroma components from volatilizing rapidly and affecting the mosquito repellent effect and fragrance retention effect.

[0055] Specifically, the mass ratio of plant carbon particles to wormwood essential oil, citronella essential oil, patchouli essential oil and coffee essential oil is 100:(1-3):(1-3):(0.1-0.3):(0.5-1); among them, the mass ratio of wormwood essential oil, citronella essential oil, patchouli essential oil and coffee essential oil is preferably 2:2:0.1:0.8.

[0056] In step 5), wormwood essential oil, citronella essential oil, patchouli essential oil and coffee essential oil are mixed in proportion, and part of the mixed essential oil is mixed with plant carbon particles, so that the plant carbon particles adsorb the mixed essential oil; after the plant carbon particles are dried, part of the mixed essential oil is added again, so that the plant carbon particles adsorb the mixed essential oil; repeat several times until the mixed essential oil is completely adsorbed to obtain mosquito repellent adsorption particles. Specifically, the adsorption can be repeated 3-5 times, so that the essential oil molecules are better fixed on the plant carbon particles, and the release rate of the essential oil molecules can be further delayed when used, thereby extending the mosquito repellent time and fragrance retention time of the air freshener.

[0057] The non-toxic air freshener of the present application has the following preparation steps: dissolving the colloidal complex into a liquid state, adding mosquito repellent adsorption particles under stirring, continuing to stir to make the mixture evenly mixed, stopping stirring, standing and cooling to solidify to form a non-toxic air freshener with mosquito repellent function.

[0058] The present application forms mosquito repellent adsorption particles by compounding wormwood, lemongrass, patchouli and coffee with mosquito and insect repellent functions and mixes them with a colloidal complex. Unlike adding liquid essential oils into the colloidal complex, there is no need to add additional stabilizers, cross-linking agents, surfactants, etc. to make the essential oils better integrated into the colloidal complex, and can significantly improve the mosquito repellent effect and fragrance retention effect.

[0059] In order to make the present invention easier to understand, the present invention will be further described in detail below in conjunction with examples, which are merely illustrative and are not intended to limit the scope of application of the present invention. The raw materials or components used in the present invention can be obtained by commercial routes or conventional methods unless otherwise specified.

[0060] Preparation Example 1

[0061] Preparation of mosquito repellent adsorbent particles:

[0062] (1) taking 10 parts of wormwood, 50 parts of citronella, 0.1 parts of patchouli and 5 parts of coffee grounds respectively, and performing steam distillation through a distiller to obtain wormwood essential oil, citronella essential oil, patchouli essential oil and coffee essential oil and distillation residue;

[0063] (2) mixing the distillation residues, drying them at 80° C., and sieving them to obtain plant particles;

[0064] (3) 50 parts of plant particles, 1 part of titanium dioxide, 1 part of zinc oxide and 15 parts of sodium carboxymethyl cellulose are mixed and spray granulated to prepare adsorption particles;

[0065] (4) heat treating the adsorbed particles at 300°C for 2 h to obtain plant carbon particles;

[0066] (5) 0.1 parts of wormwood essential oil, 0.3 parts of citronella essential oil, 0.03 parts of patchouli essential oil and 0.1 parts of coffee essential oil are mixed in proportion to obtain a mixed essential oil, and 1 / 3 of the total volume of the mixed essential oil is mixed with 10 parts of plant carbon particles until the essential oil is completely adsorbed; then 1 / 3 of the total volume of the mixed essential oil is added and mixed with the plant carbon particles again until the essential oil is completely adsorbed; then the remaining mixed essential oil is added and mixed with the plant carbon particles until the essential oil is completely adsorbed to obtain mosquito repellent adsorption particles a.

[0067] Preparation Example 2

[0068] The difference from Preparation Example 1 is that in step (1), 50 parts of wormwood, 10 parts of citronella, 0.3 parts of patchouli and 1 part of coffee grounds are respectively taken and steam distilled through a distiller to obtain wormwood essential oil, citronella essential oil, patchouli essential oil and coffee essential oil as well as distillation residue.

[0069] The other steps are the same as those in Preparation Example 1 to obtain mosquito repellent adsorption particles b.

[0070] Preparation Example 2

[0071] The difference from Preparation Example 1 is that in step (1), 30 parts of wormwood, 35 parts of citronella, 0.15 parts of patchouli and 3 parts of coffee grounds are respectively taken and steam distilled through a distiller to obtain wormwood essential oil, citronella essential oil, patchouli essential oil and coffee essential oil as well as distillation residue.

[0072] The other steps are the same as those in Preparation Example 1 to obtain mosquito repellent adsorbent particles c.

[0073] Preparation Example 4

[0074] The difference from Preparation Example 1 is that in step (1), 30 parts of wormwood, 35 parts of citronella and 3 parts of coffee grounds are respectively taken and steam distilled through a distiller to obtain wormwood essential oil, citronella essential oil and coffee essential oil and distillation residue; in step (5), 0.1 part of wormwood essential oil, 0.3 part of citronella essential oil and 0.1 part of coffee essential oil are mixed in proportion to obtain a mixed essential oil.

[0075] The other steps are the same as those in Preparation Example 1 to obtain mosquito repellent adsorbent particles d.

[0076] Preparation Example 5

[0077] The difference from Preparation Example 1 is that in step (1), 30 parts of wormwood, 35 parts of citronella and 0.15 parts of patchouli are respectively taken through a distiller for steam distillation to obtain wormwood essential oil, citronella essential oil and patchouli essential oil and distillation residue; in step (5), 0.1 parts of wormwood essential oil, 0.3 parts of citronella essential oil and 0.03 parts of patchouli essential oil are uniformly mixed in proportion to obtain a mixed essential oil.

[0078] The other steps are the same as those in Preparation Example 1 to obtain mosquito repellent adsorbent particles e.

[0079] Preparation Example 6

[0080] The difference from Preparation Example 3 is that in step (3), 80 parts of plant particles, 5 parts of titanium dioxide, 5 parts of zinc oxide and 50 parts of sodium carboxymethyl cellulose are mixed and spray granulated to obtain adsorption particles.

[0081] The other steps are the same as those in Preparation Example 3 to obtain mosquito repellent adsorbent particles f.

[0082] Preparation Example 7

[0083] The difference from Preparation Example 3 is that in step (3), 60 parts of plant particles, 3 parts of titanium dioxide, 1 part of zinc oxide and 25 parts of sodium carboxymethyl cellulose are mixed and spray granulated to obtain adsorption particles.

[0084] The other steps are the same as those in Preparation Example 3 to obtain mosquito repellent adsorption particles g.

[0085] Preparation Example 8

[0086] The difference from Preparation Example 6 is that step (3) is to directly heat-treat the plant carbon particles at 300° C. for 2 h without adding titanium dioxide and zinc oxide to obtain the plant carbon particles.

[0087] The other steps are the same as those in Preparation Example 6 to obtain mosquito repellent adsorbent particles h.

[0088] Preparation Example 9

[0089] The difference from Preparation Example 6 is that step (4) is to mix 0.1 parts of wormwood essential oil, 0.3 parts of citronella essential oil, 0.03 parts of patchouli essential oil and 0.1 parts of coffee essential oil in proportion to obtain a mixed essential oil, and mix 1 / 3 of the total volume of the mixed essential oil with 10 parts of adsorption particles that have not been heat treated until the essential oil is completely adsorbed; then add 1 / 3 of the total volume of the mixed essential oil, and mix it with the adsorption particles again until the essential oil is completely adsorbed; then add the remaining mixed essential oil and mix it with the adsorption particles until the essential oil is completely adsorbed, and the other steps are the same as in Preparation Example 6 to obtain mosquito repellent adsorption particles i.

[0090] Preparation Example 10

[0091] The difference from Preparation Example 7 is that in step (5), 0.3 parts of wormwood essential oil, 0.1 parts of citronella essential oil, 0.01 parts of patchouli essential oil and 0.05 parts of coffee essential oil are evenly mixed in proportion to obtain a mixed essential oil, 1 / 3 of the total volume of the mixed essential oil is mixed with 10 parts of plant carbon particles until the essential oil is completely adsorbed; then 1 / 3 of the total volume of the mixed essential oil is added and mixed with the plant carbon particles again until the essential oil is completely adsorbed; then the remaining mixed essential oil is added and mixed with the plant carbon particles until the essential oil is completely adsorbed, and the other steps are the same as in Preparation Example 7 to obtain mosquito repellent adsorption particles j.

[0092] Preparation Example 11

[0093] The difference from Preparation Example 7 is that in step (5), 0.2 parts of wormwood essential oil, 0.2 parts of citronella essential oil, 0.01 parts of patchouli essential oil and 0.08 parts of coffee essential oil are evenly mixed in proportion to obtain a mixed essential oil, 1 / 3 of the total volume of the mixed essential oil is mixed with 10 parts of plant carbon particles until the essential oil is completely adsorbed; then 1 / 3 of the total volume of the mixed essential oil is added and mixed with the plant carbon particles again until the essential oil is completely adsorbed; then the remaining mixed essential oil is added and mixed with the plant carbon particles until the essential oil is completely adsorbed, and the other steps are the same as in Preparation Example 7 to obtain mosquito repellent adsorption particles k.

[0094] Example 1

[0095] Soak the carrageenan with cold water, and heat it to 80°C under stirring to dissolve it, so as to obtain carrageenan colloid; then mix 58 parts of carrageenan colloid and 30 parts of sodium carboxymethyl cellulose, and heat it to 75°C in a water bath to form a liquid colloid complex, add 12 parts of mosquito repellent adsorption particles a under stirring, continue stirring to make the mixture evenly mixed, stop stirring, let it stand and cool, and then solidify to form a non-toxic air freshener with mosquito repellent function.

[0096] Example 2

[0097] Soak the carrageenan with cold water, and heat it to 80°C under stirring to dissolve it, so as to obtain carrageenan colloid; then mix 50 parts of carrageenan colloid and 35 parts of sodium carboxymethyl cellulose, and heat it to 75°C in a water bath to form a liquid colloid complex, add 15 parts of mosquito repellent adsorption particles a under stirring, continue stirring to make the mixture evenly mixed, stop stirring, let it stand and cool, and then solidify to form a non-toxic air freshener with mosquito repellent function.

[0098] Example 3

[0099] Soak the carrageenan with cold water, and heat it to 80°C under stirring to dissolve it, so as to obtain carrageenan colloid; then mix 70 parts of carrageenan colloid and 25 parts of sodium carboxymethyl cellulose, and heat it to 75°C in a water bath to form a liquid colloid complex, add 5 parts of mosquito repellent adsorption particles a under stirring, continue stirring to mix them evenly, stop stirring, let it stand and cool, and then solidify to form a non-toxic air freshener with mosquito repellent function.

[0100] Example 4

[0101] The difference from Example 3 is that the mosquito repellent adsorption particles b of Preparation Example 2 are added.

[0102] Example 5

[0103] The difference from Example 3 is that the mosquito repellent adsorption particles c of Preparation Example 3 are added.

[0104] Example 6

[0105] The difference from Example 3 is that the mosquito repellent adsorption particles f of Preparation Example 6 are added.

[0106] Example 7

[0107] The difference from Example 3 is that the mosquito repellent adsorption particles g of Preparation Example 7 are added.

[0108] Example 8

[0109] The difference from Example 3 is that the mosquito repellent adsorption particles h of Preparation Example 8 are added.

[0110] Example 9

[0111] The difference from Example 3 is that the mosquito repellent adsorption particles i of Preparation Example 9 are added.

[0112] Example 10

[0113] The difference from Example 3 is that the mosquito repellent adsorbent particles j of Preparation Example 10 are added.

[0114] Embodiment 11

[0115] The difference from Example 3 is that the mosquito repellent adsorption particles k of Preparation Example 11 are added.

[0116] Comparative Example 1

[0117] The carrageenan is soaked in cold water, and heated to 80°C under stirring to dissolve it, so as to obtain carrageenan colloid; then 70 parts of carrageenan colloid and 25 parts of sodium carboxymethyl cellulose are mixed, and heated to 75°C in a water bath to form a liquid colloid complex, and 5 parts of mixed essential oils (the mass ratio of wormwood essential oil, citronella essential oil, patchouli essential oil and coffee essential oil is 1:3:0.3:1) are added under stirring, and stirring is continued to make the mixture evenly mixed, and stirring is stopped, and the mixture is allowed to stand and cool to solidify to form a non-toxic air freshener with mosquito repellent function.

[0118] Comparative Example 2

[0119] The difference from Example 3 is that the mosquito repellent adsorbent particles d of Preparation Example 4 are added.

[0120] Comparative Example 3

[0121] The difference from Example 3 is that the mosquito repellent adsorption particles e of Preparation Example 5 are added.

[0122] The air fresheners prepared in Examples 1-11 and Comparative Examples 1-3 were subjected to mosquito repellent tests and deodorizing effect tests.

[0123] 1. Select 100 Aedes albopictus mosquitoes with qualified attack power and place them in a 25m 2 In a room, 5 volunteers were selected to sit in the center of the room, and an air freshener was placed in the center of the room to observe whether there were mosquitoes coming to suck blood. If there were mosquitoes coming to suck blood, it was judged that the repulsion and avoidance failed, and the effective protection time h was recorded. The average protection time recorded by each volunteer was recorded in Table 1.

[0124] 2. In two rooms 25m 2 20mg / m 3 The H2S gas and NH3 gas are taken out of the room, which is the original odor concentration C0. After placing the air freshener in the room for 10 minutes, 30 minutes and 1 hour, samples are taken to measure the odor concentration C1 in the room respectively, and the deodorization rate is calculated and recorded in Table 1.

[0125]

[0126] Table 1

[0127]

[0128]

[0129] According to the comparison between Comparative Example 1 and Example 3, the air freshener formed by using mosquito repellent adsorption particles in the colloidal composite has a greatly improved mosquito repelling time and a significantly improved deodorization rate. This may be because the mosquito repellent adsorption particles can not only slow down the release rate of the mosquito repellent active ingredients and extend the mosquito repelling time, but also the adsorption particles can adsorb odor molecules in the environment, thereby significantly improving the deodorization rate.

[0130] According to the comparison between Comparative Example 1, Example 3 and Example 8, the deodorization rate of the air freshener without adding titanium dioxide and zinc oxide is far inferior to that of the air freshener containing photocatalysts such as titanium dioxide and zinc oxide.

[0131] According to the comparison between Comparative Example 1, Example 3 and Example 9, it can be seen that the mosquito repellent adsorption particles that have not undergone high-temperature heat treatment, compared with the mosquito repellent essential oil, when used in air fresheners, can improve the mosquito repellent duration and deodorization rate of the air freshener, but the mosquito repellent effect and deodorization effect are not as good as the mosquito repellent adsorption particles that have undergone high-temperature heat treatment. It may be that the adsorption performance of the mosquito repellent adsorption particles that have undergone high-temperature heat treatment is enhanced, thereby improving its ability to adsorb odor molecules.

[0132] According to the comparison of Examples 1-3, when the content of mosquito repellent adsorbent particles in the air freshener increases, the mosquito repellent duration and deodorization rate will also be improved, but at the same time, the production cost will also increase accordingly.

[0133] According to the comparison of Examples 4-5, 6-7, and 10-11, the mosquito repellent adsorption particles containing suitable photocatalysts such as titanium dioxide and zinc oxide and essential oils can also exert good mosquito repellent and deodorizing effects even at a relatively low content in the air freshener.

[0134] It should be noted that the embodiments described above are only used to explain the present application and do not constitute any limitation to the present application. The present application is described with reference to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory words, rather than restrictive words. The present application may be modified as specified within the scope of the claims of the present application, and the present application may be revised without departing from the scope and spirit of the present application. Although the present application described therein relates to specific methods, materials and embodiments, it does not mean that the present application is limited to the specific examples disclosed therein. On the contrary, the present application can be extended to all other methods and applications with the same functions.

Claims

1. A non-toxic air freshener with mosquito repellent function, characterized in that: The raw materials include the following components: 3%-25% of mosquito repellent adsorbent particles and 75%-97% of colloidal complex; The mosquito repellent adsorption particles are made of wormwood, citronella, patchouli and coffee grounds.

2. The non-toxic air freshener according to claim 1, characterized in that: The mass ratio of the wormwood, citronella, patchouli and coffee grounds is (10-50): (10-50): (0.1-0.3): (1-5).

3. The non-toxic air freshener according to claim 1, characterized in that: The colloid complex consists of carrageenan and sodium carboxymethyl cellulose, wherein the carrageenan accounts for 50%-75% of the total mass of the colloid complex.

4. The non-toxic air freshener according to claim 1, characterized in that: The preparation steps of the mosquito repellent adsorption particles include: 1) taking wormwood, citronella, patchouli and coffee grounds respectively and performing steam distillation through a distiller to obtain wormwood essential oil, citronella essential oil, patchouli essential oil and coffee essential oil and distillation residue; 2) mixing, drying and sieving the distillation residues to obtain plant particles; 3) mixing the plant particles, titanium dioxide, zinc oxide and sodium carboxymethyl cellulose and spraying and granulating them to obtain adsorption particles; 4) heat-treating the adsorbed particles to obtain plant carbon particles; 5) The plant carbon particles are mixed with wormwood essential oil, citronella essential oil, patchouli essential oil and coffee essential oil in proportion until the essential oil is completely adsorbed to obtain mosquito repellent adsorption particles.

5. The non-toxic air freshener according to claim 4, characterized in that: The mass ratio of the plant particles, titanium dioxide, zinc oxide and sodium carboxymethyl cellulose is (50-80):(1-5):(1-5):(15-50).

6. The non-toxic air freshener according to claim 4, characterized in that: The particle size of the plant particles is 50-75 μm, and the particle sizes of the titanium dioxide and zinc oxide are less than 1 μm.

7. The non-toxic air freshener according to claim 4, characterized in that: The temperature of the heat treatment of the adsorbed particles is 250-450°C, and the treatment time is 1-2h.

8. The non-toxic air freshener according to claim 4, characterized in that: The mass ratio of the plant carbon particles to the wormwood essential oil, the citronella essential oil, the patchouli essential oil and the coffee essential oil is 100:(1-3):(1-3):(0.1-0.3):(0.5-1).

9. The non-toxic air freshener according to claim 4, characterized in that: The step 5) comprises: Mugwort essential oil, citronella essential oil, patchouli essential oil and coffee essential oil are mixed in proportion, part of the mixed essential oil is mixed with plant carbon particles, and the plant carbon particles adsorb the mixed essential oil; after the plant carbon particles are dried, part of the mixed essential oil is added again, and the plant carbon particles adsorb the mixed essential oil; this process is repeated multiple times until the mixed essential oil is completely adsorbed to obtain mosquito repellent adsorption particles.

10. The non-toxic air freshener according to claim 4, characterized in that: The specific surface area of ​​the plant carbon particles is 85-120m 2 / g.

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