Mosquito trapping composition and preparation method and application thereof

Abstract

The invention discloses a mosquito trapping composition and a preparation method and application thereof, and relates to the technical field of daily chemical industry. According to the mosquito trapping composition, various different mosquito trapping components such as 2-undecanone, n-tetradecane and glucose are compounded, broad-spectrum trapping of various mosquitoes such as anopheles and aedes is achieved, meanwhile, the non-ionic surface active agent with the HLB value being 9-14 is utilized, and the mosquito trapping effect is good. The oil-soluble mosquito-trapping effective component and the water phase containing glucose can be compounded to form a stable microemulsion, so that the volatilization speeds of different mosquito-trapping components can be matched, and the system can be ensured to have higher storage stability and long-acting use effect.

Description

Technical Field

[0001] This invention relates to the field of daily chemical technology, specifically to a mosquito-attracting composition, its preparation method, and its application. Background Technology

[0002] Mosquitoes, belonging to the family Culicidae in the order Diptera, are major vectors for diseases such as malaria, dengue fever, and Zika virus, posing a serious threat to human health and safety. Domestic and international mosquito control products are mostly repellents and insecticides, with very few mosquito attractants available. While repellents and insecticides can quickly reduce mosquito numbers, most leave residues in the environment, posing potential threats to humans, livestock, and other organisms, and mosquitoes are prone to developing resistance. Mosquito control methods that utilize mosquito behavior to trap and kill them offer significantly improved human safety and are less likely to cause resistance. However, existing attractants typically contain both oily and watery components, presenting two major technical bottlenecks: first, the emulsion system is unstable, easily leading to oil-water separation over time, causing an imbalance in the evaporation rates of the components and a sharp decline in attraction effectiveness; second, common disease-carrying mosquito species include Anopheles, Aedes, and Culex, each with different habits and odor preferences. Therefore, it is of great significance to provide a mosquito attractant that has both broad-spectrum attraction and long-term stability. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a mosquito-attracting composition, its preparation method, and its application.

[0004] The above-mentioned objective of this invention is achieved through the following technical solution: A mosquito attractant composition comprising the following components in parts by weight: The oil phase consists of 1-6 parts, a nonionic surfactant of 3-7 parts, glucose of 4.35-14.4 parts, and water of 73.95-91.2 parts; the oil phase includes at least one of 2-undecane, n-tetradecane, methylheptenone, tea ketone, and squalene. The nonionic surfactant has an HLB value of 9-14.

[0005] The mosquito-attracting composition provided by this invention incorporates multiple oil-phase components, including 2-undecane, n-tetradecane, methylheptenone, tea ketone, and squalene, as the primary olfactory attractant. This mimics the volatile components in human sweat and respiration, attracting female mosquitoes that primarily seek and ingest blood. Simultaneously, glucose is added as a secondary attractant, mimicking sugar sources such as plant nectar to attract male mosquitoes and non-oviparous female mosquitoes. Since different components have varying attraction abilities to different mosquitoes, the combination of these components allows the mosquito-attracting system of this invention to attract a wide range of mosquitoes, including Anopheles, Aedes, and Culex, as well as both male and female mosquitoes, demonstrating a significant broad-spectrum mosquito-attracting effect. However, because the mosquito-attracting components used in this invention are highly volatile, while the mosquito-attracting activity is enhanced in the short term, the long-term stability of the attractant decreases. In response, the inventors of this application, through extensive experimental research, discovered that by employing microemulsification technology to uniformly disperse oil-soluble mosquito-attracting components such as tea fragrance ketones in an aqueous phase, the resulting water-in-oil nano-droplets can effectively encapsulate volatile mosquito-attracting components. The release rate is controlled through the barrier effect at the two-phase interface, significantly extending the effective action time. To simultaneously achieve effective emulsification and encapsulation of multiple oil phase components, a surfactant with a specific HLB value (hydrophilic-lipophilic balance) is required. The inventors found that using a surfactant with an HLB value of 9-14 ensures a match between the water and oil phases, forming a dense composite interfacial film with optimal sustained-release performance. This not only ensures a matching evaporation rate among the components, allowing each component to fully exert its function for broad-spectrum mosquito attraction, but also enables the composition to form a stable microemulsion that does not separate over long-term use, significantly improving storage stability and long-term use stability.

[0006] It should be noted that, in addition to requiring the use of surfactants with specific HLB values, this invention also limits the type of surfactant to nonionic. The inventors have discovered that if anionic, cationic, or other types of surfactants are used, although the initial solubilizing ability can be improved, it will lead to excess charge at the water-oil interface, thereby affecting the long-term performance of the resulting composition.

[0007] It should be noted that the proportions of the oil phase components, surfactants, glucose, and aqueous phase in this invention also need to be limited. Excessive oil phase addition will result in larger droplet sizes in the formed oil-in-water emulsion, making it difficult for the surfactant-formed interfacial film to effectively coat the droplets. This can lead to droplet aggregation and oil-water separation, affecting the long-term stability of the composition. Insufficient oil phase addition, since the attraction effect is derived from the volatilization of the oil phase components, will also reduce the lifespan of the composition. Excessive surfactant addition can easily cause foaming in the system, affecting the volatilization of the active ingredients. In addition to acting as a secondary attractant, glucose, as a high-concentration solute in the aqueous phase, can also regulate the osmotic pressure and viscosity of the aqueous phase. Therefore, to achieve both excellent long-term effectiveness and higher mosquito-attracting activity, the amount of glucose also needs to be controlled within a certain range. Excessive glucose concentration may cause droplets in the oil-water mixture to easily break, reducing the strength of the oil-water interfacial film and the stability of the microemulsion. Insufficient glucose concentration will significantly affect the broad-spectrum attraction effect.

[0008] It should be noted that the HLB value of the single-component nonionic surfactant in this invention can be directly calculated using the Griffin formula or obtained by referring to the product technical parameter table provided by the supplier.

[0009] In a specific embodiment of the present invention, the total mass parts of all components in the mosquito-attracting composition are 82.3-118.6 parts. Preferably, the total mass parts of all components in the mosquito-attracting composition are 100 parts.

[0010] Preferably, the nonionic surfactant has an HLB value of 12-13.

[0011] Preferably, the nonionic surfactant comprises sorbitan monooleate and polyoxyethylene dehydrated sorbitan monooleate in a mass ratio of (0.5-1.5):(3-5).

[0012] A surfactant with HLB 9-14 can be obtained by compounding polyoxyethylene dehydrated sorbitan monooleate (Tween 80, HLB 15) and sorbitan anhydride monooleate (Span 80, HLB 4.3) in a specific ratio. The polyoxyethylene group (strongly hydrophilic) in Tween 80 molecules and the dehydrated sorbitan ring and long-chain oleic acid group (strongly lipophilic) in Span 80 molecules can be closely arranged and intercalated at the oil-water interface to form an exceptionally dense composite interfacial film with high mechanical strength. This enables efficient emulsification, forming small-sized, narrowly distributed nanodroplets. The synergistic formation of the dense interfacial film significantly slows down the evaporation rate of volatile inducer molecules encapsulated in the oil phase, which not only facilitates the matching of the evaporation rate of the active components but also enables long-term sustained release.

[0013] In a specific embodiment of the present invention, the HLB value of the nonionic surfactant obtained by compounding sorbitan monooleate and polyoxyethylene dehydrated sorbitan monooleate is calculated as follows: (a×H1+b×H2) / (a+b) Where a is the mass of sorbitan monooleate, H1 is the HLB value of sorbitan monooleate; b is the mass of polyoxyethylene dehydrated sorbitan monooleate, and H2 is the HLB value of polyoxyethylene dehydrated sorbitan monooleate.

[0014] More preferably, the nonionic surfactant comprises sorbitan monooleate and polyoxyethylene dehydrated sorbitan monooleate in a mass ratio of 1:(3.5-4.5).

[0015] Preferably, the oil phase component further includes n-butanol.

[0016] n-Butanol can intercalate into the surfactant interface film, aiding in the formation and stabilization of microemulsions. The addition of n-butanol is beneficial for synergistic effects with specific surfactants, harmonizing the polarity and evaporation rate of different active components.

[0017] More preferably, the oil phase component comprises 2-undecane, n-tetradecane, methylheptenone, tea ketone, n-butanol and squalene in a mass ratio of (0.4-1.2):(0.8-1.8):(0.005-0.05):(0.4-1.2):(0.4-1.2):(0.01-0.1).

[0018] Controlling the proportions of each component in the oil phase within the aforementioned range helps balance the mosquito-attracting activity, volatility, and osmotic pressure of each component, resulting in a composition that balances superior mosquito-attracting activity and long-lasting effectiveness. Among these, 2-undecane and n-tetradecane volatilize relatively slowly; increasing their addition shifts the volatilization equilibrium towards the gas phase, thus improving their volatilization rates. Methylheptenone and n-butanol volatilize relatively quickly; appropriately reducing their addition helps shift the volatilization equilibrium towards the liquid phase, preventing excessively rapid volatilization. Tea-fragrant ketone, as a key differentiating component of this invention, plays a crucial role in the system; therefore, even with its relatively rapid volatilization, its addition should still be adjusted to 0.4-1.2 parts to fully utilize its function. Furthermore, adjusting the addition amounts of each component can regulate the total osmotic pressure of the oil phase, resulting in a stronger water-oil interface film.

[0019] This invention also protects a method for preparing the mosquito-attracting composition, comprising the following steps: S1. Mix the nonionic surfactant, glucose, and water to obtain a dispersion; S2. Mix 2-undecane, n-tetradecane, methylheptenone and tea aroma ketone to obtain an oil phase. Add the oil phase to the dispersion obtained in step S1. After dispersing evenly, add the remaining components to obtain the final product.

[0020] Preferably, in step S1, glucose and water are first mixed, and then a nonionic surfactant is added and mixed. More preferably, in step S1, glucose and water are first mixed at 40-60°C. Even more preferably, in step S1, after mixing glucose and water, the mixture is cooled to room temperature before the nonionic surfactant is added and mixed.

[0021] Preferably, the mixing in step S1 includes stirring, and the stirring speed is 600-1000 rpm. More preferably, the stirring time is 5-10 min.

[0022] In a specific embodiment of the present invention, step S1 includes: first, mixing glucose and water at 40-60°C and 600-1000 rpm for 5-10 minutes, then cooling to room temperature, adding a nonionic surfactant, and mixing at 600-1000 rpm for 5-10 minutes.

[0023] Preferably, the dispersion in step S2 is any one of stirring, ultrasonic dispersion, homogenization, or high-speed shearing; when the dispersion is stirring, the stirring speed is 600-1000 rpm; when the dispersion is ultrasonic dispersion, the ultrasonic dispersion power is 200-500 W; when the dispersion is homogenization, the homogenization pressure is 50-200 bar; when the dispersion is high-speed shearing, the high-speed shearing speed is 8000-12000 rpm. More preferably, the dispersion time in step S2 is 2-5 minutes.

[0024] Preferably, after the dispersion is uniform in step S2, the remaining components are added at a dropping rate of 1-3 mL / min. More preferably, after adding the remaining components, a stirring step is further included, wherein the stirring time is 10-15 min and the stirring speed is 600-1000 rpm.

[0025] This invention also protects a mosquito-attracting method, comprising the following steps: The mosquito-attracting composition is simply dropped onto a slow-release carrier and placed in the mosquito-killing area for its effect.

[0026] Preferably, the slow-release carrier includes at least one of sponge, foam ceramic, diatomaceous earth, activated carbon, and polymer foam.

[0027] Preferably, the concentration of the mosquito-attracting composition added to the slow-release carrier is 0.05-0.5 mL / cm³. 3 .

[0028] More preferably, the concentration of the mosquito-attracting composition added to the slow-release carrier is 0.1-0.3 mL / cm³. 3 .

[0029] The above-mentioned concentration range ensures that the carrier is fully wetted and does not leak.

[0030] Preferably, the sustained-release carrier has a porosity of 50%-95% and a pore size of 0.1-500 μm.

[0031] More preferably, the pore size of the sustained-release carrier is 10-200 μm.

[0032] Preferably, the duration of the action is 12-72 hours.

[0033] Compared with the prior art, the present invention has the following beneficial effects: The mosquito-attracting composition provided by this invention uses different mosquito-attracting components to achieve broad-spectrum attraction to a variety of different mosquitoes. At the same time, it utilizes surfactants with specific HLB values ​​to enable the oil-soluble mosquito-attracting active ingredients to form a stable microemulsion in the aqueous phase. This not only allows the volatilization rates of different mosquito-attracting components to be matched, but also ensures that the system has higher storage stability and long-lasting effect. Attached Figure Description

[0034] Figure 1 An optical photograph of the mosquito attractant composition provided in Example 1 of the present invention.

[0035] Figure 2 This is an optical photograph of the mosquito-attracting effect in Embodiment 1 of the present invention.

[0036] Figure 3 This is a DLS particle size distribution diagram of the mosquito attractant composition emulsion obtained in Example 1 of the present invention.

[0037] Figure 4 An optical photograph of the mosquito attractant composition provided in Comparative Example 1 of the present invention. Detailed Implementation

[0038] The present invention will be further described below with reference to specific embodiments, but the embodiments do not limit the present invention in any way. Unless otherwise stated, the raw materials and reagents used in the embodiments of the present invention are conventionally purchased raw materials and reagents.

[0039] Example 1 A mosquito attractant composition comprising the following components in parts by weight: The oil phase consists of 4.575 parts, the nonionic surfactant consists of 5 parts, the glucose consists of 9.15 parts, and the aqueous solution consists of 82.35 parts. The oil phase component comprises the following components in parts by weight: 1 part of 2-undecanone, 1.5 parts of n-tetradecane, 0.025 parts of methylheptenone, 1 part of tea fragrance ketone, 1 part of n-butanol, and 0.05 parts of squalene. The nonionic surfactant comprises Tween 80 and Span 80 in a mass ratio of 4:1. The HLB value of the resulting nonionic surfactant is calculated using the formula (4×15+1×4.3) / (4+1) and is 12.86.

[0040] The method for preparing the mosquito-attracting composition in this embodiment includes the following steps: Glucose was added to water at 1.45℃ and mixed at 800 rpm for 7 min. Then, a nonionic surfactant was added and stirred at 800 rpm for 10 min to obtain a dispersion. S2. Mix 2-undecane, n-tetradecane, methylheptenone and tea aroma ketone to obtain an oil phase. Add the oil phase to the dispersion obtained in step S1 while stirring at 800 rpm. After the dispersion is uniform, add the remaining components at a dropping rate of 2 mL / min and continue stirring at 800 rpm for 15 minutes to obtain the final product.

[0041] Example 2 A mosquito-attracting composition, wherein the only difference from Example 1 is: It includes 2.515 parts of oil phase component, 7 parts of nonionic surfactant, 14 parts of glucose, and 75 parts of aqueous solution; The oil phase component comprises the following components in parts by weight: 0.5 parts of 2-undecanone, 1 part of n-tetradecane, 0.005 parts of methylheptenone, 0.5 parts of tea aroma ketone, 0.5 parts of n-butanol, and 0.01 parts of squalene.

[0042] The nonionic surfactant comprises Tween 80 and Span 80 in a mass ratio of 3:1.5 (4.67 parts by mass and 2.33 parts by mass, respectively), and the HLB value of the resulting nonionic surfactant is calculated to be 9.43.

[0043] The preparation method of the mosquito-attracting composition in this embodiment is consistent with that in Example 1.

[0044] Example 3 A mosquito-attracting composition, wherein the only difference from Example 1 is: It includes 5.85 parts of oil phase component, 3 parts of nonionic surfactant, 4.5 parts of glucose, and 90 parts of aqueous solution; The oil phase component comprises the following components in parts by weight: 1.2 parts of 2-undecanone, 1.7 parts of n-tetradecane, 0.05 parts of methylheptenone, 1.2 parts of tea aroma ketone, 1.2 parts of n-butanol, and 0.1 parts of squalene.

[0045] The nonionic surfactant comprises Tween 80 and Span 80 in a mass ratio of 5:0.5 (6.36 parts by mass and 0.63 parts by mass, respectively), and the HLB value of the resulting nonionic surfactant is calculated to be 14.

[0046] The preparation method of the mosquito-attracting composition in this embodiment is consistent with that in Example 1.

[0047] Example 4 A mosquito-attracting composition, wherein the only difference from Example 1 is: The nonionic surfactant comprises Tween 80 and Span 80 in a mass ratio of 3:2 (4.2 parts by mass and 2.8 parts by mass, respectively), and the HLB value of the resulting nonionic surfactant is calculated to be 10.72.

[0048] The preparation method of the mosquito-attracting composition in this embodiment is consistent with that in Example 1.

[0049] Example 5 A mosquito-attracting composition, wherein the only difference from Example 1 is: The 4.575 parts of oil phase composition include the following components in parts by weight: 2 parts of 2-undecanone, 0.5 parts of n-tetradecane, 0.001 parts of methylheptenone, 2 parts of tea aroma ketone, 0.069 parts of n-butanol, and 0.005 parts of squalene.

[0050] The preparation method of the mosquito-attracting composition in this embodiment is consistent with that in Example 1.

[0051] Example 6 A mosquito-attracting composition, wherein the only difference from Example 1 is: The 4.575 parts of oil phase composition include the following components in parts by weight: 0.1 parts of 2-undecanone, 2.175 parts of n-tetradecane, 0.1 parts of methylheptenone, 0.2 parts of tea aroma ketone, 1.7 parts of n-butanol, and 0.3 parts of squalene.

[0052] The preparation method of the mosquito-attracting composition in this embodiment is consistent with that in Example 1.

[0053] Comparative Example 1 A mosquito-attracting composition, wherein the only difference from Example 1 is: Replace Span 80 with an equal mass of Tween 80. The resulting nonionic surfactant has an HLB value of 15.

[0054] The preparation method of the mosquito-attracting composition in this comparative example is consistent with that in Example 1.

[0055] Comparative Example 2 A mosquito-attracting composition, wherein the only difference from Example 1 is: Replace Tween 80 with an equal mass of Span 80. The resulting nonionic surfactant has an HLB value of 4.3.

[0056] The preparation method of the mosquito-attracting composition in this comparative example is consistent with that in Example 1.

[0057] Comparative Example 3 A mosquito-attracting composition, wherein the only difference from Example 1 is: Span 80 was replaced with an equal mass of Brij 30 (Brij 30, lauryl polyoxyethylene ether-4, HLB 9.7). The resulting surfactant had an HLB value of 13.94.

[0058] This comparative example aims to illustrate that even when the HLB value (13.94) of the mixed surfactants falls within the scope of this invention, the emulsifying effect and long-term stability are significantly reduced due to the failure to use the preferred surfactant combination (Tween 80 and Span 80) capable of forming a dense composite interfacial film. This demonstrates that this invention has specific requirements for the type and structure of surfactants to achieve a stable microemulsion system, and not merely for meeting the HLB value range.

[0059] The preparation method of the mosquito-attracting composition in this comparative example is consistent with that in Example 1.

[0060] Comparative Example 4 A mosquito-attracting composition, wherein the only difference from Example 1 is: Tween 80 was replaced with an equal mass of Myrj 52 (HLB 16.9). The resulting nonionic surfactant had an HLB value of 14.38.

[0061] The preparation method of the mosquito-attracting composition in this comparative example is consistent with that in Example 1.

[0062] Comparative Example 5 A mosquito-attracting composition, wherein the only difference from Example 1 is: Tween 80 was replaced with an equal mass of isopropylamine dodecylphenol sulfonate (anionic, HLB 11.7). The resulting surfactant had an HLB value of 10.22.

[0063] The preparation method of the mosquito-attracting composition in this comparative example is consistent with that in Example 1.

[0064] Comparative Example 6 A mosquito-attracting composition, wherein the only difference from Example 1 is: The surfactant comprises Tween 80 and sodium dodecylbenzenesulfonate in a mass ratio of 3:2 (4.2 parts by mass and 2.8 parts by mass, respectively). Sodium dodecylbenzenesulfonate is anionic with an HLB value of 10.6. The resulting surfactant has an HLB value of 13.24.

[0065] The surfactant is a mixture of Tween 80 and sodium dodecylbenzenesulfonate in a mass ratio of 3:2 (4.2 parts by mass and 2.8 parts by mass, respectively). Sodium dodecylbenzenesulfonate is an anionic surfactant with a reference HLB value of 10.6. The calculated HLB value of the resulting mixed surfactant is 13.24.

[0066] The preparation method of the mosquito-attracting composition in this comparative example is consistent with that in Example 1.

[0067] Comparative Example 7 A mosquito-attracting composition, wherein the only difference from Example 1 is: The nonionic surfactant comprises Tween 80 and Span 80 in a mass ratio of 5:0.2 (6.73 parts by mass and 0.26 parts by mass, respectively), and the HLB value of the resulting nonionic surfactant is calculated to be 14.59.

[0068] The preparation method of the mosquito-attracting composition in this comparative example is consistent with that in Example 1.

[0069] Comparative Example 8 A mosquito-attracting composition, wherein the only difference from Example 1 is: The nonionic surfactant comprises Tween 80 and Span 80 in a mass ratio of 1:4 (i.e., 1 part Tween 80 and 4 parts Span 80), and the HLB value of the resulting nonionic surfactant is calculated to be 6.44.

[0070] The preparation method of the mosquito-attracting composition in this comparative example is consistent with that in Example 1.

[0071] Comparative Example 9 A mosquito-attracting composition, wherein the only difference from Example 1 is: Replace the glucose with an equal mass of water.

[0072] The preparation method of the mosquito-attracting composition in this comparative example is consistent with that in Example 1.

[0073] Comparative Example 10 A mosquito-attracting composition, wherein the only difference from Example 1 is: Replace the tea aroma ketone with an equal mass of nonanal.

[0074] The preparation method of the mosquito-attracting composition in this comparative example is consistent with that in Example 1.

[0075] Comparative Example 11 A mosquito-attracting composition, wherein the only difference from Example 1 is: Replace 2-undecanone with an equal mass of nonanal.

[0076] The preparation method of the mosquito-attracting composition in this comparative example is consistent with that in Example 1.

[0077] Performance testing I. Storage stability test The compositions obtained in the examples and comparative examples were sealed and stored in the dark at room temperature (25°C) for 1 month. The presence of stratification, precipitation, or flocculation before and after storage was observed with the naked eye. At the same time, the initial average particle size and the average particle size after storage and the polydispersity index (PDI) were measured using a nanoparticle size analyzer.

[0078] The test results are shown in Table 1 below: Table 1. Note: In Table 1 above, " / " indicates that effective particle size measurement is not possible due to the heterogeneity of the system (layering, paste formation, etc.).

[0079] II. Broad-spectrum mosquito attraction effect test: 1.5 mL of the compositions obtained in the examples and comparative examples were respectively added to a polyurethane foam block with a porosity of 80% and a pore size of 100 μm, at a concentration of 0.15 mL / cm³. 3 The carrier was placed in a mosquito trap and positioned in a corner of a standard test mosquito net (120cm×200cm×60cm). Fifty hungry mosquitoes (25 males and 25 females) each of Aedes albopictus, Anopheles skrvii, and Culex quinquefasciatus were released into the center of the net, and the percentage of mosquitoes captured after 24 hours was recorded.

[0080] The test results are shown in Table 2 below: Table 2. III. Long-term stability test of mosquito attraction effect The capture rate of Aedes albopictus mosquitoes by the compositions obtained in the examples and comparative examples was tested according to the method described in Part II, "Testing the Broad-Spectrum Mosquito Attraction Effect." After 24 hours of treatment, the mosquito killer was removed and the mosquitoes were counted. After the count was completed, the number of Aedes mosquitoes in the mosquito net was replenished to 50. This cycle was repeated for a total of 72 hours.

[0081] The test results are shown in Table 3 below: Table 3. As can be seen from the data in Tables 1-3 above, the mosquito-attracting composition emulsion provided by this invention exhibits excellent storage stability. Even after one month of storage, the droplets remain well dispersed and do not agglomerate, with a PDI (polydispersity index) not exceeding 0.45. Based on this, the composition of this invention possesses excellent sustained mosquito-attracting activity; the mosquito-trapping effect after 72 hours is no more than 45% lower than that after 24 hours of use. Furthermore, based on the careful formulation of multiple components that can play different roles, the composition obtained by this invention exhibits excellent mosquito-trapping activity against three different mosquito species: Aedes albopictus, Anopheles skrjei, and Culex pipiens quinquefasciatus. Each mosquito species can achieve a capture rate of over 68% within 24 hours, demonstrating its excellent broad-spectrum activity.

[0082] According to Examples 1 and 4, even if the HLB value of the surfactant used is met, Tween 80 and Span 80 have different molecular structures and can play different roles on the water-oil interface film. Therefore, when the ratio of Tween 80 to Span 80 is the preferred ratio of (3-5):(0.5-1.5) of the present invention (Example 1), better mosquito-attracting activity and persistence can be obtained.

[0083] According to Examples 5-6, the volatility of each component in the oil phase is different, and each plays a different role. Only by compounding each component in a specific ratio can the effects of each component be fully harmonized, and excellent mosquito-attracting activity and long-term stable use be obtained.

[0084] The results of Comparative Examples 1, 2, 7, and 8 collectively demonstrate that surfactant HLB values ​​exceeding the limits defined in this invention (9-14) lead to system instability and reduced effectiveness. The results of Comparative Examples 3, 5, and 6 show that even if the HLB value meets the requirements, if the type of nonionic surfactant is inappropriately selected or ionic surfactants are mixed in, the stable system and mosquito-attracting effect of this invention cannot be obtained. This highlights the necessity of using specific nonionic surfactants (especially the combination of Tween 80 and Span 80).

[0085] According to Comparative Examples 9-11, the excellent effect achieved by the composition of the present invention is based on the full harmonization of the properties of each component. The absence of any component will lead to a decrease in the mosquito-attracting effect.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A mosquito-attracting composition, characterized in that, The components include the following parts by weight: The oil phase consists of 1-6 parts, nonionic surfactants 3-7 parts, glucose 4.35-14.4 parts, and water 73.95-91.2 parts. The oil phase component includes at least one of 2-undecane, n-tetradecane, methylheptenone, tea fragrance ketone, and squalene; The nonionic surfactant has an HLB value of 9-14.

2. The mosquito-attracting composition according to claim 1, characterized in that, The nonionic surfactant comprises sorbitan monooleate and polyoxyethylene dehydrated sorbitan monooleate in a mass ratio of (0.5-1.5):(3-5).

3. The mosquito-attracting composition as described in claim 1, characterized in that, The oil phase component also includes n-butanol.

4. The mosquito-attracting composition as described in claim 3, characterized in that, The oil phase components include 2-undecane, n-tetradecane, methylheptenone, tea ketone, n-butanol, and squalene in a mass ratio of (0.4-1.2):(0.8-1.8):(0.005-0.05):(0.4-1.2):(0.4-1.2):(0.01-0.1).

5. A method for preparing the mosquito-attracting composition according to any one of claims 1-4, characterized in that, Includes the following steps: S1. Mix the nonionic surfactant, glucose, and water to obtain a dispersion; S2. Mix 2-undecane, n-tetradecane, methylheptenone and tea aroma ketone to obtain an oil phase. Add the oil phase to the dispersion obtained in step S1. After dispersing evenly, add the remaining components to obtain the final product.

6. The method for preparing the mosquito-attracting composition as described in claim 5, characterized in that, The mixing in step S1 includes stirring, and the stirring speed is 600-1000 rpm.

7. The method for preparing the mosquito-attracting composition according to claim 5, characterized in that, The dispersion in step S2 is performed by any one of stirring, ultrasonic dispersion, homogenization, or high-speed shearing; when the dispersion is performed by stirring, the stirring speed is 600-1000 rpm; when the dispersion is performed by ultrasonic dispersion, the ultrasonic dispersion power is 200-500 W; when the dispersion is performed by homogenization, the homogenization pressure is 50-200 bar; when the dispersion is performed by high-speed shearing, the high-speed shearing speed is 8000-12000 rpm; and / or, after the dispersion in step S2 is uniform, the remaining components are added at a dropping rate of 1-3 mL / min.

8. A method for attracting mosquitoes, characterized in that, Includes the following steps: The mosquito-attracting composition according to any one of claims 1-4 is dropped onto a slow-release carrier and placed in the mosquito-killing area to act.

9. The mosquito-attracting method as described in claim 8, characterized in that, The slow-release carrier includes at least one of sponge, foam ceramic, diatomaceous earth, activated carbon, and polymer foam.

10. The mosquito-attracting method as described in claim 8 or 9, characterized in that, The concentration of the mosquito-attracting composition added to the slow-release carrier is 0.05-0.5 mL / cm³. 3 ; And / or, the porosity of the sustained-release carrier is 50%-95%, and the pore size is 0.1-500 μm; And / or, the duration of the action is 12-72 hours.

Images