Liquid mosquito repellent film and production equipment thereof

Abstract

The present invention discloses a liquid anti-mosquito water film and its production equipment, which relates to the field of anti-mosquito technology. The production equipment comprises: a base, an L-shaped bracket is arranged on one side of the top of the base, a first motor is arranged at the middle of the top of the L-shaped bracket, an output end of the first motor is arranged with a first rotating shaft extending to the top of the base, a driving gear is arranged on the outside of the first rotating shaft, a support seat is arranged on one side of the base, and four groups of shock-absorbing springs are distributed on the bottom of the support seat. When processing sodium silicate, the present invention can start the first motor to drive the driving gear to rotate, thereby driving the driven gear to rotate together, and finally rotate the upper grinding block, and then cooperate with the fixed lower grinding block to fully grind the sodium silicate finely. The ground sodium silicate can meet the production needs, thereby improving the production efficiency, and the structure is simple and easy to operate, thereby greatly improving the work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of mosquito repellent, in particular to a liquid mosquito repellent water film and production equipment thereof. Background Art

[0002] Summer and autumn are the seasons with more mosquitoes. Mosquito bites not only cause skin itching, but also spread various diseases and affect human health. Therefore, products and devices that kill mosquito larvae are needed to eliminate mosquitoes fundamentally. The existing mosquito prevention and mosquito killing methods are not lethal enough to mosquitoes, and the killing efficiency is too low, which makes mosquitoes resistant, making it more difficult to prevent and control and suppress mosquitoes.

[0003] Most of the existing mosquito repellent water films are chemical agents, which are harmful to the environment and human body; the existing production equipment has a complex structure and is inconvenient to operate when processing materials, and cannot meet the production quality requirements during processing. Summary of the invention

[0004] The purpose of the present invention is to provide a liquid mosquito-proof water film and its production equipment in order to solve the problems that most of the existing mosquito-proof water films are chemical agents and are harmful to the environment and human body; the existing production equipment has a complex structure and is inconvenient to operate when processing materials, and cannot meet the production quality requirements during processing.

[0005] The first aspect of the present invention is to provide a liquid mosquito repellent film, comprising the following raw material components in percentage by mass:

[0006] Liquid paraffin: 7-15%

[0007] Polydimethylsiloxane: 30-60%

[0008] Sodium silicate: 20-30%

[0009] Modifier: 1-10%

[0010] Hydroxyphenidate: 1-3%

[0011] Saltidin factor: 1-2%

[0012] Wherein, the preparation method of the polydimethylsiloxane comprises:

[0013] Step 1, hydrolyzing dimethyldichlorosilane to obtain a primary polycondensation ring body;

[0014] Step 2: The primary polycondensation ring body obtained in step 1 is cracked and refined to obtain a low ring body;

[0015] Step 3, the low-ring compound prepared in step 2 is subjected to a telomerization reaction with a capping agent at normal pressure and 50-70° C. until the viscosity of the reaction liquid is 500-1000 cSt;

[0016] Step 4: gradually increase the temperature of the reaction box in step 3 to 110-130° C. at 1-3° C. / min, continue stirring for 2-4 hours, and gradually reduce the pressure in the reaction box to 60-80 kPa over 10-30 minutes and maintain for 2-4 hours to obtain the polydimethylsiloxane.

[0017] Preferably, the raw material components of the liquid mosquito repellent film include:

[0018] Liquid paraffin: 10-13%

[0019] Dimethicone: 35-50%

[0020] Sodium silicate: 23-28%

[0021] Modifier: 5-10%

[0022] Hydroxyphenidate: 1-3%

[0023] Saltidin factor: 1-2%.

[0024] Preferably, the viscosity of the reaction solution obtained in step 3 is 600-900 cSt, such as 700 cSt, 800 cSt, etc.

[0025] Preferably, the heating rate of the reaction box in step 4 is 2°C / min.

[0026] Preferably, the liquid paraffin is a light liquid paraffin having a carbon number of 10-12.

[0027] Preferably, the modifier is ethylene-vinyl acetate copolymer.

[0028] Another aspect of the present invention is to provide a production device for liquid mosquito repellent film, including: a base, an L-shaped bracket is arranged on one side of the top of the base, a first motor is arranged in the middle of the top of the L-shaped bracket, an output end of the first motor is provided with a first rotating shaft extending to the top of the base, a driving gear is arranged on the outer side of the first rotating shaft, a support seat is arranged on one side of the base, four groups of shock-absorbing springs are distributed on the bottom of the support seat, the support seat is connected to a lower grinding block through the shock-absorbing springs, a first discharge port extending to the top of the lower grinding block is arranged at the bottom of the lower grinding block, a heating box is arranged on the side of the L-shaped bracket away from the first motor, and the heating box A material drop port is provided at the top of the hot box, an upper grinding block is provided at the bottom of the heating box, a first material feed port is provided at the middle of the upper grinding block, an electric heating wire is provided inside the heating box, a driven gear matching with the driving gear is provided on the outer side of the upper grinding block, the mixing box includes a second motor, a second rotating shaft, spiral blades, a second material discharge port and a second material feed port, the second motor is installed in the middle of the top of the mixing box, a second rotating shaft is provided at the output end of the second motor, a spiral blade is provided on the outer side of the second rotating shaft, the second material discharge port is installed on one side of the top of the mixing box, and the second material discharge port is installed on the outer bottom of the mixing box.

[0029] Preferably, two groups of legs are evenly arranged at the bottom of the support seat, and anti-slip pads are arranged at the bottom of the legs.

[0030] Preferably, an upper grinding surface is provided at the bottom of the upper grinding block, a lower grinding surface is provided at the top of the lower grinding block, and sliding marks are provided on the surfaces of the upper grinding surface and the lower grinding surface.

[0031] Preferably, the first feed port is in an inverted frustum structure.

[0032] Preferably, the first motor is electrically connected to an external controller.

[0033] Preferably, electromagnetic valves are disposed inside the drop port and the first discharge port.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The mosquito-proof water film provided by the present invention has a very small surface tension and can spread automatically on the surface of static water bodies, including large water bodies, to form an extremely thin film, which blocks mosquito larvae and pupae from breathing near the water surface and causes their death. Compared with mosquito-killing chemicals or biological agents, it does not require application equipment or professional application, and its efficacy is not affected by water quality. It acts on the immature stages of mosquitoes (eggs, larvae, pupae), rather than a certain stage, and is non-toxic. In addition, because the liquid mosquito-proof water film is a pure physical control rather than a chemical control, mosquitoes will not develop drug resistance to it, which is a major advantage, while insecticides usually have a greatly reduced effectiveness due to drug resistance. The role of this agent is to drip on the water surface to form a thin film on the water surface. The role of this film is, first, mosquitoes lay eggs under the water surface, and when the eggs hatch, they swim to the water surface to breathe air, but due to the presence of this film, the mosquito larvae suffocate and cannot survive, thereby achieving the effect of killing mosquitoes. Second, when a mosquito touches the water surface, on the one hand, because the tension of the film is very small, the text cannot stay on the surface of the water film and falls into the water body; on the other hand, because the main component of this film is silicone oil, silicone oil will block the respiratory trachea of ​​the mosquito, causing it to suffocate and eventually die, achieving an insecticidal effect.

[0036] 2. When processing sodium silicate, the present invention can start the first motor to drive the driving gear to rotate, thereby driving the driven gear to rotate together, and finally rotating the upper grinding block, and cooperating with the fixed lower grinding block to fully and finely grind the sodium silicate. The ground sodium silicate can meet the production needs, thereby improving the production efficiency, and the structure is simple and easy to operate, thereby greatly improving the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the grinding structure of the present invention;

[0038] Figure 2 It is a schematic diagram of the grinding and degradation structure of the present invention;

[0039] Figure 3 is a side sectional view of the present invention;

[0040] Figure 4 It is a schematic diagram of the stirring structure of the present invention.

[0041] In the figure: 1. base; 2. L-shaped bracket; 3. first motor; 4. first rotating shaft; 5. driving gear; 6. blanking port; 7. heating box; 8. heating wire; 9. upper grinding block; 10. first feeding port; 11. upper grinding surface; 12. lower grinding block; 13. lower grinding surface; 14. first discharging port; 15. driven gear; 16. shock-absorbing spring; 17. supporting leg; 18. supporting seat; 19. mixing box; 20. second motor; 21. second rotating shaft; 22. spiral blade; 23. second discharging port; 24. second feeding port. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Example 1

[0044] A liquid mosquito repellent film, characterized by being composed of the following raw material components in percentage by mass:

[0045] Liquid paraffin: 13%

[0046] Dimethicone: 56%

[0047] Sodium silicate: 30%

[0048] Modifier: 1%

[0049] Hydroxyphenidate: 1%

[0050] Factor: 1%

[0051] First, dimethyldichlorosilane is hydrolyzed to obtain a primary polycondensation ring body, and the obtained primary polycondensation ring body is cracked and refined to obtain a low ring body; the prepared low ring body and a capping agent are subjected to a polycondensation reaction at normal pressure and 50°C until the viscosity of the reaction liquid is 1000cSt; the temperature of the reaction box is gradually increased to 120±2°C at 2°C / min, and stirring is continued for 4h, and the pressure in the reaction box is gradually reduced to 70kPa for 20min and maintained for 2h to obtain polydimethylsiloxane.

[0052] The anti-mosquito water film in this embodiment contains silicone oil, which is green, environmentally friendly, non-toxic and harmless, and has a wide range of applications.

[0053] First, the electromagnetic valve in the blanking port is opened to send the roughly processed sodium silicate into the heating box, and then the sodium silicate is heated and dried by the electric heating wire, and then fed through the feed box, and finally the first motor is started to drive the active gear to rotate, thereby driving the driven gear to rotate together, and finally the upper grinding block is rotated, and then the fixed lower grinding block is matched to fully grind the sodium silicate finely. After the processing is completed, 20% of the sodium silicate is weighed separately, and then 7% liquid paraffin, 30% polydimethylsiloxane, 1% modifier, 1% hydroxypiperidin and Factors are sequentially put into the mixing box 1 along the second feed port, and then the motor is started to drive the second rotating shaft, so that the stirring blade is rotated at high speed, so as to mix the raw materials, thereby obtaining a liquid mosquito repellent water film, which is put into the water surface to form a thin film on the water surface. The functions of this film are: first, mosquitoes lay eggs under the water surface, and when the eggs hatch, they swim to the water surface to breathe air, but due to the existence of this film, the mosquito larvae suffocate and cannot survive, thereby achieving the effect of killing mosquitoes. Second, when mosquitoes contact the water surface, because the main component of this film is silicone oil, the silicone oil will block the mosquito's respiratory trachea, causing it to suffocate and eventually die, achieving the effect of killing insects.

[0054] Example 2

[0055] The liquid mosquito repellent film provided in this embodiment is composed of the following raw material components in percentage by mass:

[0056] Liquid paraffin: 10.5%

[0057] Dimethicone: 49.5%

[0058] Sodium silicate: 30%

[0059] Modifier: 10%

[0060] Hydroxyphenidate: 2%

[0061] Factor: 1.5%

[0062] First, dimethyldichlorosilane is hydrolyzed to obtain a primary polycondensation ring body, and the obtained primary polycondensation ring body is cracked and refined to obtain a low ring body; the prepared low ring body and a capping agent are subjected to a polycondensation reaction at normal pressure and 70°C until the viscosity of the reaction liquid is 500cSt; the temperature of the reaction box is gradually increased to 130±2°C at 3°C / min, and stirring is continued for 4h, and the pressure in the reaction box is gradually reduced to 70kPa for 20min and maintained for 2h to obtain polydimethylsiloxane.

[0063] The invention is provided with silicone oil, so as to be green, environmentally friendly, non-toxic and harmless, and widely applicable.

[0064] First, the electromagnetic valve in the blanking port is opened to send the roughly processed sodium silicate into the heating box, and then the sodium silicate is heated and dried by the electric heating wire, and then fed through the feed box, and finally the first motor is started to drive the driving gear to rotate, thereby driving the driven gear to rotate together, and finally the upper grinding block is rotated, and then the fixed lower grinding block is matched to fully grind the sodium silicate finely. After the processing is completed, 20% of the sodium silicate is weighed separately, and then 7% liquid paraffin, 30% polydimethylsiloxane, 1% modifier, 2% hydroxypiperidin and Factors, and then sequentially put into the mixing box 1 along the second feed port, and then start the motor to drive the second rotating shaft, so that the stirring blade is rotated at high speed, so as to stir and mix the raw materials, thereby obtaining a liquid mosquito-proof water film, which is put into the water surface to form a thin film on the water surface. The functions of this film are: first, mosquitoes lay eggs under the water surface, and when the eggs hatch, they swim to the water surface to breathe air, but due to the existence of this film, the mosquito larvae suffocate and cannot survive, thereby achieving the effect of killing mosquitoes. Second, when mosquitoes contact the water surface, because the main component of this film is silicone oil, the silicone oil will block the mosquito's respiratory trachea, causing it to suffocate and eventually die, achieving the insecticidal effect.

[0065] Example 3

[0066] A liquid mosquito repellent film, characterized by being composed of the following raw material components in percentage by mass:

[0067] Liquid paraffin: 15%

[0068] Dimethicone: 50%

[0069] Sodium silicate: 30%

[0070] Modifier: 5%

[0071] Hydroxyphenidate: 3%

[0072] Factor: 2%

[0073] First, dimethyldichlorosilane is hydrolyzed to obtain a primary polycondensation ring body, and the obtained primary polycondensation ring body is cracked and refined to obtain a low ring body; the prepared low ring body and a capping agent are subjected to a polycondensation reaction at normal pressure and 60°C until the viscosity of the reaction liquid is 500cSt; the temperature of the reaction box is gradually increased to 110±2°C at 2°C / min, and stirring is continued for 4h, and the pressure in the reaction box is gradually reduced to 80kPa for 20min and maintained for 2h to obtain polydimethylsiloxane.

[0074] The invention is provided with silicone oil, so as to be green, environmentally friendly, non-toxic and harmless, and widely applicable.

[0075] First, the electromagnetic valve in the blanking port is opened to send the roughly processed sodium silicate into the heating box, and then the sodium silicate is heated and dried by the electric heating wire, and then fed through the feed box, and finally the first motor is started to drive the active gear to rotate, thereby driving the driven gear to rotate together, and finally the upper grinding block is rotated, and then the fixed lower grinding block is matched to fully grind the sodium silicate finely. After the processing is completed, 20% of the sodium silicate is weighed separately, and then 7% liquid paraffin, 30% polydimethylsiloxane, 1% modifier, 3% hydroxypiperidin and Factors, and then sequentially put into the mixing box 1 along the second feed port, and then start the motor to drive the second rotating shaft, so that the stirring blades are rotated at high speed, so as to stir and mix the raw materials, so as to obtain a liquid mosquito-proof water film, which is put into the water surface to form a thin film on the water surface. The functions of this film are: first, mosquitoes lay eggs under the water surface, and when the eggs hatch, they swim to the water surface to breathe air, but due to the existence of this film, the mosquito larvae suffocate and cannot survive, thereby achieving the effect of killing mosquitoes; second, when mosquitoes contact the water surface, because the main component of this film is silicone oil, the silicone oil will block the respiratory trachea of ​​the mosquito, causing it to suffocate and eventually die, thereby achieving the insecticidal effect.

[0076] Example 4

[0077] The liquid mosquito repellent film provided in this embodiment is composed of the following raw material components in percentage by mass:

[0078] Liquid paraffin: 7%

[0079] Dimethicone: 60%

[0080] Sodium silicate: 30%

[0081] Modifier: 3%

[0082] Liquid paraffin is a light liquid paraffin with 10 carbon atoms, or a light liquid paraffin with 11 or 12 carbon atoms. It is easier to fuse with polydimethylsiloxane, sodium silicate and a modifier to form; the modifier is specifically ethylene vinyl acetate copolymer, which increases the fusion rate of liquid paraffin polydimethylsiloxane and sodium silicate, accelerates the ability to form a physical film, and improves the water resistance of the product; dimethyldichlorosilane is hydrolyzed with water to obtain a primary polycondensation ring body, the ring body is cracked and distilled to obtain a low ring body, and then the ring body, the capping agent and the catalyst are put together for polymerization to obtain a mixture of various polymerization degrees. By increasing the temperature in the reaction box to 110-130°C and reducing the pressure, the low boiling point can be removed to obtain silicone oil. The present invention is provided with silicone oil for the purpose of being green, environmentally friendly, non-toxic and harmless, and widely used. .

[0083] The surface tension of the present invention itself is extremely small, and it can automatically spread on the surface of static water bodies - including large water bodies - to form an extremely thin film, blocking mosquito larvae and pupae from breathing close to the water surface and causing their death; compared with mosquito larvae killing chemicals or biological agents, it does not require application equipment or professional application, and its efficacy is not affected by water quality. It acts on the immature stages of mosquitoes (eggs, larvae, pupae) rather than a certain stage, and is non-toxic. In addition, because the liquid mosquito repellent water film is a purely physical control rather than a chemical control, mosquitoes will not develop resistance to it - this is a major advantage - while insecticides usually have their effectiveness greatly reduced due to the development of resistance.

[0084] See also Figure 1-4 A mosquito-proof water film and its production equipment, comprising: a base 1, an L-shaped bracket 2 is arranged on one side of the top of the base 1, a first motor 3 is arranged in the middle of the top of the L-shaped bracket 2, an output end of the first motor 3 is provided with a first rotating shaft 4 extending to the top of the base 1, a driving gear 5 is arranged on the outer side of the first rotating shaft 4, a support seat 18 is arranged on one side of the base 1, four groups of shock-absorbing springs 16 are distributed on the bottom of the support seat 18, the support seat is connected to a lower grinding block 12 through the shock-absorbing springs 16, the bottom of the lower grinding block 12 is provided with a first discharge port 14 extending to the top thereof, a heating box 7 is arranged on the side of the L-shaped bracket 2 away from the first motor 3, a blanking port 6 is arranged on the top of the heating box 7, and a An upper grinding block 9 is arranged at the bottom, a first feed port 10 is arranged in the middle of the upper grinding block 9, an electric heating wire 8 is arranged inside the heating box 7, a driven gear 15 matched with the driving gear 5 is arranged on the outer side of the upper grinding block 9, the mixing box 19 includes a second motor 20, a second rotating shaft 21, a spiral blade 22, a second discharge port 23, and a second feed port 24, the second motor 20 is installed in the middle of the top of the mixing box 19, a second rotating shaft 21 is arranged at the output end of the second motor 20, a spiral blade 22 is arranged on the outer side of the second rotating shaft 21, the second discharge port 23 is installed on one side of the top of the mixing box 19, and the second discharge port 23 is installed on the outer bottom of the mixing box 19.

[0085] When processing sodium silicate, the present invention can start the first motor 3 to drive the driving gear 5 to rotate, thereby driving the driven gear 15 to rotate together, and finally rotating the upper grinding block 9, and cooperating with the fixed lower grinding block 12 to fully and finely grind the sodium silicate. The ground sodium silicate can meet the production needs, thereby improving the production efficiency. The structure is simple and easy to operate, thereby greatly improving the work efficiency.

[0086] Please refer to Figure 1 , Figure 2 and Figure 3 Two groups of legs 17 are evenly arranged at the bottom of the support seat 18, and anti-skid pads are arranged at the bottom of the legs. The present invention is provided with legs 17 in order to better support the equipment so that it can run stably, and anti-skid pads are also arranged in order to better increase the friction between the equipment and the ground.

[0087] Please refer to Figure 1 and Figure 3 An upper grinding surface 11 is provided at the bottom of the upper grinding block 9, and a lower grinding surface 13 is provided at the top of the lower grinding block 12, and sliding marks are provided on the surfaces of the upper grinding surface 11 and the lower grinding surface 13. The present invention is provided with the upper grinding surface 11 and the lower grinding surface 13 to extend the service life of the upper grinding block 9 and the lower grinding block 12.

[0088] Please refer to Figure 1 The first feed port 10 is an inverted frustum structure. The present invention sets an inverted frustum structure so that when the material enters the lower grinding block 12, it can slide down along the conical surface, thereby achieving a certain buffering effect and avoiding falling too fast and causing damage to the lower grinding surface 13.

[0089] Please refer to Figure 1 and Figure 2 The first motor 3 is electrically connected to an external controller. The present invention is electrically connected in order to better control the first motor 3, thereby facilitating the use of operators.

[0090] Please refer to Figure 1 , Figure 2 and Figure 3 The inside of the blanking port 6 and the first discharging port 14 are both provided with electromagnetic valves. The present invention provides electromagnetic valves in order to better control the speed and time of blanking and discharging, so as to facilitate the operator to plan the time.

[0091] Mosquito repellent film performance test

[0092] Using Culex pipiens pallens and Aedes albopictus raised in the laboratory as the living test targets, different doses of liquid mosquito repellent film were added to the growth water at different larval stages, pupal stages and egg-laying stages to observe their effects on the growth of mosquitoes.

[0093] Determination method

[0094] 1. Test materials

[0095] Experimental equipment: several adjustable pipettes, several straws for selecting larvae, 1 / 10,000 electronic balance, and several white porcelain basins.

[0096] Agent: Mosquito trap and anti-mosquito water film, provided by Yisaoqing (Shanghai) Environmental Technology Co., Ltd.

[0097] Test insects: 1st to 4th instar larvae, pupae, and adult mosquitoes after feeding on blood of Culex pipiens.

[0098] Aedes albopictus 1st to 4th instar larvae, pupae, and adult mosquitoes after sucking blood.

[0099] 2. Measurement conditions

[0100] The temperature is 26℃±1℃; the relative humidity is 60%±5%.

[0101] 3. Determination method

[0102] 3.1. Test on mosquito larvae: Take a white porcelain basin with a diameter of 30cm and a depth of 10cm, fill it with clean water, put 50 healthy Culex pipiens larvae in each basin, and add the agent according to the dosage based on the water surface area in the basin. Observe the death and pupation of the larvae every day. There are 3 groups in total, and set up a blank control group.

[0103] When checking the number of dead larvae, use pointed tweezers to gently touch the respiratory tubes of the test worms' heads and tails. If the larvae are slow to react and cannot float to the surface of the water, or are paralyzed and convulsed and dying, they should be counted as dead. If the mortality rate of the control group is more than 20%, the entire experiment should be scrapped and redone. If the mortality rate of the control group is less than 20%, the Abbott formula can be used to calculate the corrected mortality rate.

[0104] 3.2. Mosquito pupae test: Take a white porcelain basin with a diameter of 30 cm and a depth of 10 cm, fill it with clean water, put 50 healthy pupae of Culex pipiens in each basin, and add the drug according to the dosage based on the water surface area in the basin. Observe the death and emergence of pupae every day. There are 3 groups in total, and set up a blank control group.

[0105] When checking the number of dead pupae, you can use pointed tweezers to gently touch the mosquito pupae. If they are slow to react and cannot float to the water surface, or if they are paralyzed and convulsed and dying, they will be counted as dead. If the mortality rate of the control group is more than 20%, the entire experiment will be scrapped and redone. If the mortality rate of the control group is less than 20%, the Abbott formula can be used to calculate the corrected mortality rate.

[0106] 3.3. Egg-laying test on adult mosquitoes: After the adult Culex pipiens mosquitoes have sucked blood, several small water basins for egg-laying are placed in the mosquito cage. Different dosages of pesticides are added to each basin. At the same time, a blank control is set up to observe the egg-laying situation of the mosquitoes on the surface of the small water basin, as well as the death of the mosquitoes falling into the water.

[0107] 3.4. Sustained effect test: Take a white porcelain basin with a diameter of 30 cm and a depth of 10 cm, fill it with clean water, and add the agent according to the water surface area. At 1, 2, 3, and 4 weeks, put 50 healthy 3-4 instar mosquito larvae or 50 mosquito pupae and appropriate amount of feed into each basin, and conduct the test according to the method in 3.1 or 3.2.

[0108] Measurement results

[0109] 1. Efficacy against Culex pipiens pallens

[0110] 1. Efficacy results against Culex pipiens larvae

[0111] Table 1. Killing effect of mosquito traps and mosquito repellent films on 1st instar larvae of Culex pipiens pallens

[0112]

[0113] Table 2. Killing effect of mosquito traps and mosquito repellent films on 2nd instar larvae of Culex pipiens pallens

[0114]

[0115] Table 3. Killing effect of mosquito traps and mosquito repellent films on 3rd instar larvae of Culex pipiens pallens

[0116]

[0117] Table 4. Killing effect of mosquito traps and mosquito repellent films on 4th instar larvae of Culex pipiens pallens

[0118]

[0119]

[0120] Table 5. The lasting effect of mosquito trap and anti-mosquito water film on 3rd to 4th instar larvae of Culex pipiens pallens

[0121]

[0122] Note: The numbers in *() are the number of dead pupae.

[0123] 2. Efficacy results against Culex pipiens pupae

[0124] Table 6. Killing effect of mosquito trap and anti-mosquito water film on Culex pipiens pupae

[0125]

[0126] Table 7. The lasting effect of mosquito trap and anti-mosquito water film on Culex pipiens pupae

[0127]

[0128]

[0129] Table 8. Effects of mosquito traps and anti-mosquito water films on egg laying of Culex pipiens pallens

[0130]

[0131] 2. Efficacy against Aedes albopictus

[0132] 1. Efficacy against Aedes albopictus larvae

[0133] Table 9. Killing effect of mosquito trap and anti-mosquito water film on 1st instar Aedes albopictus larvae

[0134]

[0135] Table 10. Killing effect of mosquito traps and mosquito repellent films on 2nd instar Aedes albopictus larvae

[0136]

[0137]

[0138] Table 11. Killing effect of mosquito trap and anti-mosquito water film on 3rd instar Aedes albopictus larvae

[0139]

[0140] Table 12. Killing effect of mosquito trap and anti-mosquito water film on 4th instar Aedes albopictus larvae

[0141]

[0142] Table 13. Killing effect of mosquito trap and anti-mosquito water film on Aedes albopictus pupae

[0143]

[0144] Table 14. Effects of mosquito traps and anti-mosquito water films on egg laying of Aedes albopictus

[0145]

[0146] Table 15. Effects of mosquito traps and anti-mosquito water films on forced oviposition of Aedes albopictus

[0147]

[0148] Table 16. The lasting effect of mosquito trap and anti-mosquito water film on 3rd to 4th instar Aedes albopictus larvae

[0149]

[0150] Note: The numbers in *() are the number of dead pupae.

[0151] 2. Results of lasting effect on Aedes albopictus pupae

[0152] Table 17. The lasting effect of mosquito trap and anti-mosquito water film on Aedes albopictus pupae

[0153]

[0154] 3. Test Evaluation

[0155] 1. Apply mosquito traps and mosquito repellent film indoors at a rate of 1-3 mL / m 2 of different doses.

[0156] 1.1 It has a good killing effect on the larvae of Culex pipiens pallens, and the killing effect on the older larvae is significantly better than that on the younger larvae. The killing rate for the 4th instar larvae in 1 day is 100%, the killing rate for the 3rd instar larvae in 2 days is 100%, and the killing rate for the 2nd instar larvae in 3 days is 100%. Although it cannot kill the younger larvae quickly, the larvae grow very slowly and cannot transition to the next higher instar normally. Eventually, they cannot complete the normal growth process and die.

[0157] 1.2 The mortality rate of Culex pipiens pupae treated for 24 hours reached 100%.

[0158] 1.3 The treated water surface can effectively prevent adult mosquitoes from laying eggs. In the case of blank control, all eggs were laid on the water surface without drug treatment. Moreover, due to the surface tension of the water surface film, female mosquitoes could land on the water surface to look for opportunities to lay eggs, and then fall into the water and die. In the case of no blank control, a small amount of eggs were laid on the water surface with low concentration, and the number of insects that fell to death was also large. There were no eggs on the water surface with high concentration, and the number of insects that fell to death was also small.

[0159] 2. Apply the mosquito repellent film provided by the present invention indoors at a rate of 1-3 mL / m 2 of different doses.

[0160] 2.1 It has a good killing effect on the larvae of Aedes albopictus, and the killing effect on the older larvae is significantly better than that on the younger larvae. The killing rate of the 4th instar larvae is 100% in 2 days, and the killing rate of the 3rd instar larvae is 100% in 3 days. Although it cannot kill the younger larvae quickly, the larvae grow very slowly and cannot transition to the next instar normally. In the end, they cannot complete the normal growth process and die. The killing effect on the larvae of Aedes albopictus is lower than that on Culex pipiens pallens.

[0161] 2.2 The mortality rate of Aedes albopictus pupae after 24-hour treatment was 100%, and the killing effect was slightly better than that of Culex pipiens pallens.

[0162] 2.3 The treated water surface can effectively prevent adult mosquitoes from laying eggs. In the case of blank control, most of them lay eggs in water without pesticide treatment, and some lay eggs in low-concentration water. Moreover, due to the surface tension of the water film, female mosquitoes can land on the water surface to find opportunities to lay eggs, and fall into the water and die. In the case of no blank control, a small number of eggs are laid in low-concentration water, and the number of insects that fall and die is also large. In high-concentration water, there are fewer eggs, and the number of insects that fall and die is also greater.

[0163] 3. Sustained efficacy test

[0164] 3.1 at 1 mL / m 2 Under the treatment with the dosage of, the killing rate of the 3rd to 4th instar larvae of Culex pipiens pallens reached 94.0% at 4 weeks, and the killing rate of the pupae of Culex pipiens pallens reached 91.3% at 3 weeks, indicating that at this dosage, the effect on the larvae and pupae of Culex pipiens pallens lasted for 3 to 4 weeks.

[0165] 3.2 at 1 mL / m 2 Under the treatment with a dose of , the killing rate against the 3rd to 4th instar larvae of Aedes albopictus reached 92.7% after 2 weeks, and the killing rate against the pupae of Culex pipiens pallens reached 93.3% after 2 weeks, indicating that at this dose, the effect on the larvae and pupae of Aedes albopictus was sustained for 2 weeks.

[0166] 4. The anti-mosquito water film contains silicate, which has extremely small surface tension. It automatically spreads on the surface of static water to form an extremely thin film. It can block the respiration of the larvae and pupae of Culex pipiens and Aedes albopictus on the water surface and cause their death. It can also prevent adult mosquitoes from laying eggs and cause female mosquitoes to fall into the water and die when laying eggs on the water surface.

[0167] 5. The anti-mosquito water film has a purely physical effect and has no drug resistance or tolerance. It acts on all stages of the mosquito life cycle and can complement other control measures. The degradation product is silicate, which is environmentally friendly. It is easy to use and does not require professional tools. It spreads automatically without being affected by water quality and is suitable for all types of static water bodies. It is worthy of research, development, and promotion and application.

[0168] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A liquid mosquito repellent film, characterized in that: Contains the following raw materials in percentage by weight: Liquid paraffin: 7-15% Polydimethylsiloxane: 30-60% Sodium silicate: 20-30% Modifier: 1-10% Hydroxyphenidate: 1-3% Saltidin factor: 1-2% Wherein, the preparation method of the polydimethylsiloxane comprises: Step 1, hydrolyzing dimethyldichlorosilane to obtain a primary polycondensation ring body; Step 2: The primary polycondensation ring body obtained in step 1 is cracked and refined to obtain a low ring body; Step 3, the low-ring compound prepared in step 2 and the capping agent are subjected to telomerization reaction at normal pressure and 50-70°C until The viscosity of the reaction liquid is 500-1000 cSt; Step 4: gradually increase the temperature of the reaction box in step 3 to 110-130°C at 1-3°C / min, and continue stirring for 2-4h. The pressure in the reaction box is gradually reduced to 60-80 kPa over a period of 10-30 minutes and maintained for 2-4 hours to obtain the polydimethylsiloxane.

2. The liquid mosquito repellent film according to claim 1, characterized in that: The liquid paraffin is a light liquid paraffin having 10-12 carbon atoms.

3. The liquid mosquito repellent film according to claim 1, characterized in that: The modifier is ethylene-vinyl acetate copolymer.

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