Special flying prevention auxiliary agent for cigars as well as preparation method and application of special flying prevention auxiliary agent

Abstract

The invention discloses a special flying prevention auxiliary agent for cigars as well as a preparation method and application thereof, and belongs to the technical field of flying prevention auxiliary agents. The anti-drift lubricating oil comprises the following components in parts by weight: 25-40 parts of modified vegetable oil, 8-15 parts of an anti-drift aid, 5-8 parts of an organic silicon wetting agent, 1-2 parts of a surfactant, 1-2 parts of a settling agent and 30-50 parts of glycerol. The anti-drifting auxiliary agent in the special flying prevention auxiliary agent for cigars contains sulfonic acid groups which can form hydrogen bonds with polar group hydroxyl groups of thick wax layers on cigar tobacco leaves, so that the spreadability and retention volume of flying prevention liquid medicine are improved, and the cigar tobacco leaves are more resistant to rain wash; the tobacco leaves with certain folds can be covered with higher efficiency; after the liquid drops impact the cigar leaves, the liquid drops are prevented from rebounding to the maximum extent, and the device is particularly suitable for use scenes of cigar tobacco leaves; the utilization rate of the flight control agent is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of aerial application adjuvants, and specifically relates to an aerial application adjuvant special for cigar tobacco, a preparation method thereof, and an application thereof. Background Art

[0002] Cigar tobacco is a plant with a high sugar content. During the planting process, it is often affected by various pests, such as tobacco budworms, aphids, cotton bollworms, Spodoptera litura, tobacco leaf miners, and tobacco beetles. These pests pose a serious threat to the growth and yield of tobacco, and pest control measures are essential.

[0003] Ordinary manual backpack sprayers and ground spray machines need to operate in the field, which will cause rolling damage to crops, resulting in a reduction in the yield of cigar tobacco and affecting the quality of cigar tobacco. Moreover, both manual backpack sprayers and ground spray machines will directly expose operators to a toxic environment, which will cause certain harm to personal safety in the long run.

[0004] When using an unmanned aerial vehicle (UAV) for pest control by spraying, it is not restricted by terrain factors and can carry out large-area operations. It is also applicable to plantations on slopes. Therefore, it is particularly crucial to select an appropriate aerial application adjuvant to improve the control effect.

[0005] The prior art includes a Chinese invention patent with the application number: CN202210766710.X, which discloses an efficient aerial application adjuvant, a preparation method thereof, and an application thereof. The aerial application adjuvant includes the following raw materials in parts by weight: 100 parts of water, 8 - 14 parts of a drift control agent, 6 - 9 parts of polyoxyethylene ether phosphate, 3 - 5 parts of a gemini sulfonate surfactant, 4 - 7 parts of an organosilicon wetting agent, 1 - 3 parts of a viscosity regulator, 1 - 5 parts of an antifreeze agent, and 3 - 5 parts of a sedimentation agent.

[0006] However, its defect is that the polyoxyethylene ether phosphate contained therein is a type of non-ionic surfactant containing a phosphate group. The synthesis of polyoxyethylene ether phosphate involves an esterification reaction, which may mean that when it is mixed with a phosphorus and potassium fertilizer system, a similar esterification reaction may occur, affecting the chemical stability of the fertilizer. And pesticides explicitly prohibited from being used in tobacco fields by the state include hexachlorocyclohexane, DTT, and organophosphorus compounds, etc.

[0007] And the most crucial point is that the thickness of the surface wax layer of cigar tobacco leaves is significantly higher than that of most common crops. The thicker wax makes it more difficult for droplets to spread and adhere on the leaf surface. None of the commercially available aerial application adjuvants on the market are specifically optimized for the characteristics of cigar tobacco leaves. Therefore, in order to fill the technical gap in the market, the present application provides an aerial application adjuvant special for cigar tobacco, a preparation method thereof, and an application thereof. Summary of the Invention

[0008] To solve the defect problems existing in the above technical solutions; the purpose of the present invention is to provide a special aerial spraying adjuvant for cigar and its preparation method and application. The purpose of the present invention can be achieved through the following technical solutions: A special aerial spraying adjuvant for cigar includes: 25-40 parts of modified vegetable oil, 8-15 parts of anti-drift adjuvant, 5-8 parts of silicone wetting agent, 1-2 parts of surfactant, 1-2 parts of sedimentation agent, and 30-50 parts of glycerol.

[0009] The modified vegetable oil is fatty acid methyl ester and / or fatty acid ethyl ester formed by esterification of one or several of soybean oil, corn oil, and castor oil; The anti-drift adjuvant is modified polyacrylamide; The modification monomer of the modified polyacrylamide includes self-made modified nano-silica.

[0010] The preparation method of the self-made modified nano-silica is: Disperse 3 g of nano-silica in 100 ml of deionized water, and use ultrasonic treatment for 1 h to ensure the full dispersion of nano-silica to form a mixed solution; Add 5 g of mercaptopropylmethyldimethoxysilane and 0.5 ml of hydrochloric acid with a mass concentration of 37% to 200 mL of deionized water; React under magnetic stirring for 6 h to form a dispersion; Then slowly add the nano-silica mixed solution to the dispersion and continue magnetic stirring for 2 h; Subsequently, add 30 ml of H 2 O 2 with a mass concentration of 30% and 10 mL of H 2 SO 4 with a mass concentration of 3%; Carry out high-speed magnetic stirring at 45 °C for 12 h, and finally centrifuge and wash 3 times with absolute ethanol to remove unreacted reagents, thus obtaining the intermediate product.

[0011] Disperse 3 g of the intermediate product in 100 ml of absolute ethanol, and carry out ultrasonic treatment for 45 min to form an intermediate product solution; Subsequently, add 2 g of KH-570 to 50 ml of ethanol aqueous solution with a concentration of 80%, and then add glacial acetic acid dropwise to adjust the pH to 4-5, and stir and hydrolyze for 45 min to form a hydrolysis solution; Then slowly add the dispersed intermediate product solution to the hydrolysis solution, and react under magnetic stirring at 60 °C for 6 h; Finally, centrifuge and wash 3 times with absolute ethanol, and dry in vacuum at 60 °C to obtain the self-made modified nano-silica.

[0012] Preparation and synthesis method of the modified polyacrylamide: Place 3 g of self-made modified nano-silica into 150 ml of deionized water, then add 0.2 g of KH-550, and after ultrasonic treatment for 1 h; add 20 g of acrylamide monomer and 0.3 g of ammonium persulfate, and stir at room temperature for 0.5 h; after stirring is completed, degas the mixed solution and seal it in a nitrogen atmosphere to remove dissolved oxygen; then place the reaction vessel in a water bath at 60 °C for free radical polymerization reaction for 32 h, and finally completely dry the obtained product at room temperature, then soak it in phosphoric acid with a mass concentration of 2% for 48 h, take it out and dry it to prepare the modified polyacrylamide.

[0013] The silicone wetting agent is one of Silwet L-77 and Silwet 408; The surfactant is one of fatty alcohol polyoxyethylene ether and castor oil polyoxyethylene ether; The settling agent is one or both of urea and sodium chloride.

[0014] Further, the GAS number of mercaptopropylmethyldimethoxysilane for modifying nano-silica is 31001-77-1; Further, the modified vegetable oil is purchased from Guangzhou Chubu Chemical Co., Ltd., or other commercially available products can also be purchased; The preparation method of the special aerial spraying adjuvant for cigar is as follows: Place the modified vegetable oil and glycerol in a blender and stir for 2 min; then add the anti-drift adjuvant and silicone wetting agent and continue to stir for 5 min; finally add the surfactant and settling agent and continue to stir for 2 min to prepare the special aerial spraying adjuvant for cigar; The stirring rate during the preparation and synthesis process of the special aerial spraying adjuvant for cigar is 80-120 r / min.

[0015] The mass percentage of the special aerial spraying adjuvant for cigar in the aerial spraying liquid is 1-2%.

[0016] The beneficial effects of the present invention are: 1. The anti-drift agent in the special aerial spraying adjuvant for cigars of the present invention is modified polyacrylamide. The modified polyacrylamide introduced during its preparation and synthesis, after being added to the aerial spraying liquid, has macromolecular chain segments in a coiled state, forming a three-dimensional network structure with low cross-linking degree. When this three-dimensional network structure is applied in the field of aerial spraying, it can significantly increase the viscosity of the aerial spraying liquid. The increase in viscosity significantly inhibits the fragmentation of droplets in the high-speed airflow of the unmanned aerial vehicle, greatly reducing the generation of small droplets with a size less than 100 μm that drift. And under the synergistic effect of the two, it can enhance the toughness of the droplets and improve the shear resistance, enabling the unmanned aerial vehicle to maintain the integrity of the droplets during the spraying process, reducing the risk of droplet dispersion, and being more resistant to the shear force of high-speed spraying by the unmanned aerial vehicle, and not easily causing nozzle blockage. 2. The anti-drift agent in the special aerial spraying adjuvant for cigars of the present invention contains sulfonic acid groups, which can form hydrogen bonds with the polar hydroxyl groups on the thick wax layer of cigar tobacco leaves, improving the spreading property and retention amount of the aerial spraying liquid, making cigar tobacco leaves more resistant to rain erosion, achieving more efficient coverage for tobacco leaves with certain wrinkles, and enabling the droplets to avoid rebound to the greatest extent after hitting the cigar leaves, being particularly suitable for the use scenario of cigar tobacco leaves and improving the utilization rate of the aerial spraying agent. Specific Embodiments

[0017] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to embodiments. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and do not limit the present invention. Additionally, for the numerical ranges in the present invention, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Each intermediate value within any stated value or stated range, as well as each smaller range between any other stated value or intermediate value within the stated range, is also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded from the range.

[0018] Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention pertains. Although the present invention only describes preferred methods and materials, any methods and materials similar or equivalent to those described herein can also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials related to the documents. In case of conflict with any incorporated document, the content of this specification shall prevail.

[0019] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention description without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention description will be apparent to the skilled artisan. The present invention description and examples are exemplary only.

[0020] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0021] The "parts" indicated in the following examples are all parts by weight.

[0022] Example 1 A special anti-drifting auxiliary agent for cigars comprises the following components by weight: 25 parts of modified vegetable oil, 8 parts of anti-drifting auxiliary agent, 5 parts of organic silicon wetting agent, 1 part of surfactant, 1 part of sedimentation agent and 30 parts of glycerol.

[0023] The modified vegetable oil is fatty acid methyl ester and / or fatty acid ethyl ester formed by esterification of soybean oil; the modified vegetable oil is purchased from Guangzhou Chubu Chemical Co., Ltd., and other commercially available products can also be purchased; The anti-drifting aid is modified polyacrylamide; The modified monomer of the modified polyacrylamide comprises self-made modified nano silicon dioxide.

[0024] The preparation method of the homemade modified nano-silica is as follows: 3 g of nano-silica is dispersed in 100 ml of deionized water, and ultrasonic treatment is performed for 1 h to ensure that the nano-silica is fully dispersed to form a mixed solution; 5 g of mercaptopropylmethyldimethoxysilane and 0.5 ml of hydrochloric acid with a mass concentration of 37% are added to 200 ml of deionized water; the mixture is reacted for 6 h under magnetic stirring to form a dispersion; the nano-silica mixture is then slowly added to the dispersion, and the magnetic stirring is continued for 2 h; and 30 ml of H 2 O with a mass concentration of 30% is then added to the dispersion. 2 O 2 and 10 mL of 3% H 2 SO 4; Stir magnetically at high speed for 12 h at 45 °C, and finally wash by centrifugation with absolute ethanol three times to remove unreacted reagents, thus obtaining the intermediate product; Disperse 3 g of the intermediate product in 100 ml of absolute ethanol and ultrasonically treat for 45 min; Add 2 g of KH-570 to 50 ml of an ethanol aqueous solution with a concentration of 80%, then dropwise add glacial acetic acid to adjust the pH to 4 - 5, and stir and hydrolyze for 45 min to form a hydrolysis solution; Subsequently, slowly add the dispersed intermediate product solution to the hydrolysis solution, and react under magnetic stirring at 60 °C for 6 h; Finally, wash by centrifugation with absolute ethanol three times and dry in vacuum at 60 °C, thus obtaining self-made modified nano-silica.

[0025] The CAS number of the mercaptopropylmethyldimethoxysilane used for modifying nano-silica is 31001 - 77 - 1.

[0026] The preparation and synthesis method of the modified polyacrylamide: Place 3 g of the self-made modified nano-silica into 150 ml of deionized water, then add 0.2 g of KH-550 and ultrasonically treat for 1 h; Add 20 g of acrylamide monomer and 0.3 g of ammonium persulfate, and stir at room temperature for 0.5 h; After stirring is completed, degas the mixed solution and seal it in a nitrogen atmosphere to remove dissolved oxygen; Subsequently, place the reaction vessel in a water bath at 60 °C for free radical polymerization reaction for 32 h. Finally, completely dry the obtained product at room temperature, then soak it in phosphoric acid with a mass concentration of 2% for 48 h, take it out and dry it, thus obtaining the modified polyacrylamide.

[0027] The organosilicon wetting agent is Silwet L-77; The surfactant is fatty alcohol polyoxyethylene ether; The sedimentation agent is a mixture of urea and sodium chloride.

[0028] The preparation method of the special aerial spraying adjuvant for cigar tobacco: Place 25 parts of modified vegetable oil and 30 parts of glycerol in a blender and stir at 80 - 120 r / min for 2 min; Subsequently, add 8 parts of anti-drift adjuvant and 5 parts of organosilicon wetting agent, and continue to stir for 5 min; Finally, add 1 part of surfactant and 1 part of sedimentation agent, and continue to stir for 2 min, thus obtaining the special aerial spraying adjuvant for cigar tobacco.

[0029] Example 2 A special aerial spraying adjuvant for cigar tobacco, by weight, comprises the following components: 30 parts of modified vegetable oil, 10 parts of anti-drift adjuvant, 6 parts of organosilicon wetting agent, 1.5 parts of surfactant, 1.5 parts of sedimentation agent, 37 parts of glycerol; The modified vegetable oil is fatty acid methyl ester and / or fatty acid ethyl ester formed by esterification of corn oil and castor oil; The anti-drift aid is modified polyacrylamide; The modification monomers of the modified polyacrylamide include self-made modified nano-silica.

[0030] The silicone wetting agent is Silwet 408; The surfactant is one of castor oil polyoxyethylene ethers; The sedimentation agent is sodium chloride; Among them, in Example 2, the preparation and synthesis method of the modified polyacrylamide and the preparation method of the special aerial spraying aid for cigars are the same as those in Example 1.

[0031] Example 3 A special aerial spraying aid for cigars, by weight, includes the following components: 35 parts of modified vegetable oil, 12 parts of anti-drift aid, 7 parts of silicone wetting agent, 1.5 parts of surfactant, 1.5 parts of sedimentation agent, and 44 parts of glycerol; The modified vegetable oil is fatty acid methyl ester and / or fatty acid ethyl ester formed by esterification of castor oil; The anti-drift aid is modified polyacrylamide; The modification monomers of the modified polyacrylamide include self-made modified nano-silica.

[0032] The silicone wetting agent is Silwet 408; The surfactant is fatty alcohol polyoxyethylene ether; The sedimentation agent is a mixture of urea and sodium chloride; Among them, in Example 2, the preparation and synthesis method of the modified polyacrylamide and the preparation method of the special aerial spraying aid for cigars are the same as those in Example 1.

[0033] Example 4 A special aerial spraying aid for cigars, by weight, includes the following components: 40 parts of modified vegetable oil, 15 parts of anti-drift aid, 8 parts of silicone wetting agent, 2 parts of surfactant, 2 parts of sedimentation agent, and 50 parts of glycerol; The modified vegetable oil is fatty acid methyl ester and / or fatty acid ethyl ester formed by esterification of soybean oil and corn oil; The anti-drift aid is modified polyacrylamide; The modification monomers of the modified polyacrylamide include self-made modified nano-silica.

[0034] The silicone wetting agent is Silwet L-77; The surfactant is fatty alcohol polyoxyethylene ether; The sedimentation agent is urea; Among them, in Example 2, the preparation and synthesis method of the modified polyacrylamide and the preparation method of the special aerial spraying adjuvant for cigar are the same as those in Example 1.

[0035] Comparative Example 1 A special aerial spraying adjuvant for cigar, by weight, comprises the following components: 35 parts of modified vegetable oil, 12 parts of anti-drift adjuvant, 7 parts of silicone wetting agent, 1.5 parts of surfactant, 1.5 parts of sedimentation agent, and 44 parts of glycerol; The modified vegetable oil is fatty acid methyl ester and / or fatty acid ethyl ester formed by esterification of castor oil; The anti-drift adjuvant is polyacrylamide; directly purchased from Henan Tianfu Chemical Co., Ltd.; The silicone wetting agent is Silwet 408; The surfactant is fatty alcohol polyoxyethylene ether; The sedimentation agent is a mixture of urea and sodium chloride; The difference between Comparative Example 1 and Example 3 is that the modification of the anti-drift adjuvant is omitted and commercially available polyacrylamide is directly added instead.

[0036] Comparative Example 2 A special aerial spraying adjuvant for cigar, by weight, comprises the following components: 35 parts of modified vegetable oil, 12 parts of anti-drift adjuvant, 7 parts of silicone wetting agent, 1.5 parts of surfactant, 1.5 parts of sedimentation agent, and 44 parts of glycerol; The modified vegetable oil is fatty acid methyl ester and / or fatty acid ethyl ester formed by esterification of castor oil; The anti-drift adjuvant is a physical blend of commercially available polyacrylamide and self-made modified nano-silica with a modified monomer; The silicone wetting agent is Silwet 408; The surfactant is fatty alcohol polyoxyethylene ether; The sedimentation agent is a mixture of urea and sodium chloride; The difference between Comparative Example 2 and Example 3 is that the anti-drift adjuvant is replaced from modified polyacrylamide with a physical blend of commercially available polyacrylamide and self-made modified nano-silica with a modified monomer.

[0037] Comparative Example 3 A special aerial spraying adjuvant for cigar, by weight, comprises the following components: 35 parts of modified vegetable oil, 12 parts of anti-drift adjuvant, 7 parts of silicone wetting agent, 1.5 parts of surfactant, 1.5 parts of sedimentation agent, and 44 parts of glycerol; The modified vegetable oil is fatty acid methyl ester and / or fatty acid ethyl ester formed by esterification of castor oil; The anti-drift aid is self-made modified nano-silica; its specific preparation method is the same as that in Example 3; The silicone wetting agent is Silwet 408; The surfactant is fatty alcohol polyoxyethylene ether; The sedimentation agent is a mixture of urea and sodium chloride; The difference between Comparative Example 3 and Example 3 is that the subsequent modification of the anti-drift aid is omitted, and instead, an equal amount of modified monomer is directly added to self-make modified nano-silica.

[0038] Comparative Example 4 A special aerial spraying aid for cigar cigarettes, by weight, comprises the following components: 35 parts of modified vegetable oil, 7 parts of silicone wetting agent, 1.5 parts of surfactant, 1.5 parts of sedimentation agent, and 44 parts of glycerol; The modified vegetable oil is fatty acid methyl ester and / or fatty acid ethyl ester formed by esterification of castor oil; The silicone wetting agent is Silwet 408; The surfactant is fatty alcohol polyoxyethylene ether; The sedimentation agent is a mixture of urea and sodium chloride; The difference between Comparative Example 4 and Example 3 is that the addition of the anti-drift aid is directly omitted.

[0039] Test Example The test was set up in a tobacco cigar-growing field in Baoshan City, Yunnan Province. The tested cigar variety was Yunxue 38; Anti-drift performance test: Using a DJI T30 plant protection drone, nozzle model: XR11001VS, operating flight speed 5 m / s, relative crop height 2 m, liquid application rate per mu 1.5 L / mu, spraying rate 0.5 L / min, applying pesticides under the condition of gentle wind with a wind speed of 3 m / s to 5.2 m / s. The flight direction is perpendicular to the wind direction. At a fixed position 10 m vertically from the flight line and 1 m horizontally in the downwind direction of the flight route, water-sensitive paper is vertically placed. For each liquid medicine, repeated spraying is carried out 3 times; Subsequently, take 5 circles with a diameter of 1 cm on each water-sensitive paper, count the number of droplets in the base circles, and take the average value to measure the amount of drift. Specifically, when implementing, the drift inhibition rate = (the number of drift droplets in the blank control group - the number of drift droplets in the experimental group) / the number of drift droplets in the experimental group; 2 Among them, the blank control group is a pesticide aid without adding any anti-drift aid; the test results are shown in Table 1.

[0040] ​Aphid control rate test: Select a cigar tobacco planting field with aphid pests; for the pesticide adjuvant, select: 20 ml / mu of tebuconazole at 420 g / L + 30 ml / mu of lambda-cyhalothrin at 2.5% + 50 g / mu of potassium dihydrogen phosphate at 98%; the relevant parameters of the drone are set with reference to the anti-drift performance test; Among them, add 25 ml of the special anti-drift adjuvant for cigar tobacco prepared in Examples 1-4 and Comparative Examples 1-4 to each 1 L of the liquid medicine, and the liquid consumption per mu is 1.5 L / mu; 3 days after the operation is completed, count the aphid control effect on the cigar tobacco leaves; Among them, the blank control group is the pesticide adjuvant without adding any anti-drift adjuvant; the test results are shown in Table 1.

[0041] Table 1

[0042] Comprehensive performance analysis: For Examples 1-4 adopting the technical solution of the present invention, all have good drift inhibition rates, and their average drift inhibition rates can all reach the level of 80%; and have good drift inhibition effects, so that the average aphid control rate can also reach about 95, enabling the use of drones to spray liquid medicine to also have excellent pest control effects.

[0043] For Comparative Example 1, commercially available polyacrylamide is used, Comparative Example 2 additionally adds the modified monomers of Examples 1-4, and Comparative Example 3 only adds the modified monomers; there are large performance differences between the performances of Comparative Examples 1-4 and Examples 1-4; the possible reason is that in Examples 1-4 of the present application, the introduced anti-drift adjuvant is modified polyacrylamide, and through the synergistic effect of the modified monomers in the free radical polymerization reaction; the anti-drift adjuvant of Examples 1-4 contains sulfonic acid groups, which can form hydrogen bonds with the polar group hydroxyl of the thick wax layer on the cigar tobacco leaves, improving the spreading property and retention amount of the aerial spraying liquid medicine, making the cigar tobacco leaves more resistant to rain erosion; it can also achieve more efficient coverage for tobacco leaves with certain folds; and it can avoid the maximum rebound after the liquid droplets impact the cigar leaves, which is especially suitable for the use scenario of cigar tobacco leaves; improving the utilization rate of the aerial spraying agent.

[0044] Surface tension test: Dilute the special anti-drift adjuvant for cigar tobacco prepared in Examples 1-4 and Comparative Examples 1-4 with deionized water into an aqueous solution with a dilution factor of 1000 times, and use an optical contact angle measuring instrument DSA-100 to measure the static surface tension of the diluted solution; among them, deionized water is set as the blank control group; the test results are shown in Table 2.

[0045] Viscosity performance test: Add the anti-drift adjuvant for cigar tobacco prepared in Examples 1-4 and Comparative Examples 1-4 with a concentration of 1% to the liquid medicine; and use the capillary viscometer method to test the viscosity of the liquid medicine after adding the special anti-drift adjuvant for cigar tobacco; The static surface tension of the diluent was measured using an optical contact angle measuring instrument DSA-100; Among them, the liquid medicine without the addition of the aerial spraying adjuvant was set as the blank control group; the test results are shown in Table 2.

[0046] Table 2

[0047] Comprehensive performance analysis: In Comparative Example 3, although both the modified monomer and polyacrylamide were added, there was an obvious performance gap compared with Example 3. This shows that the preparation method of the modified polyacrylamide in Examples 1-4 of the present invention is the key to achieving such excellent technical effects. The possible reason is that the anti-drift adjuvant in the special aerial spraying adjuvant for cigar tobacco is the modified polyacrylamide. The modified polyacrylamide introduced during its preparation and synthesis, after being added to the aerial spraying liquid medicine, the macromolecular chain segments in the modified polyacrylamide are in a curled state, forming a three-dimensional network structure with a low cross-linking degree; when this three-dimensional network structure is applied to the field of aerial spraying, it can significantly increase the viscosity of the aerial spraying liquid medicine; the increase in viscosity significantly inhibits the fragmentation degree of the droplets in the high-speed airflow of the unmanned aerial vehicle, greatly reducing the generation of small droplets with a solution drift of less than 100 μm; and under the synergistic action of the two, it can enhance the toughness of the droplets and improve the shear resistance, so that during the spraying process of the unmanned aerial vehicle, the integrity of the droplets is maintained; the risk of droplet dispersion is reduced; it is also more resistant to the shear force of the high-speed spraying of the unmanned aerial vehicle and is not easily blocked by the nozzle; and the reduction of the surface tension also makes the droplets sprayed by the unmanned aerial vehicle more easily attached to the cigar tobacco leaves.

[0048] The specific embodiments described above have further elaborated on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A special fly control aid for cigars, characterized in that: The composition is as follows by weight: 25-40 parts of modified vegetable oil, 8-15 parts of anti-drift additive, 5-8 parts of silicone wetting agent, 1-2 parts of surfactant, 1-2 parts of sedimentation agent, 30-50 parts of glycerol; The anti-drifting aid is modified polyacrylamide; The modified monomer of the modified polyacrylamide comprises self-made modified nano silicon dioxide.

2. The special fly control aid for cigars according to claim 1, characterized in that: The composition is as follows by weight: 35 parts of modified vegetable oil, 12 parts of anti-drift aid, 7 parts of silicone wetting agent, 1.5 parts of surfactant, 1.5 parts of sedimentation agent, and 44 parts of glycerol.

3. The special fly control aid for cigars according to claim 1, characterized in that: The modified vegetable oil is one or more of soybean oil, corn oil and castor oil formed by esterification to form fatty acid methyl ester and / or fatty acid ethyl ester.

4. The special anti-fly agent for cigar according to claim 1, characterized in that: The organic silicon wetting agent is one of Silwet L-77 and Silwet 408.

5. The special fly control aid for cigars according to claim 1, characterized in that: The surfactant is one of fatty alcohol polyoxyethylene ether and castor oil polyoxyethylene ether.

6. The special fly control aid for cigars according to claim 1, characterized in that: The sedimentation agent is one or both of urea and sodium chloride.

7. The special anti-flying agent for cigars according to any one of claims 1 to 6, characterized in that: The method for preparing the homemade modified nano-silica comprises: dispersing the nano-silica in deionized water, ultrasonically treating for 1 hour to form a mixed solution; adding mercaptopropylmethyldimethoxysilane and hydrochloric acid to the deionized water; reacting for 6 hours under magnetic stirring to form a dispersion; then slowly adding the nano-silica mixed solution to the dispersion, and continuing magnetic stirring for 2 hours; then adding H2O2 and H2SO4 with a mass concentration of 3% to the dispersion; magnetic stirring at 45°C for 12 hours, and finally centrifugally washing with anhydrous ethanol for 3 times to prepare an intermediate product; The intermediate product was dispersed in anhydrous ethanol and subjected to ultrasonic treatment for 45 minutes; KH-570 was added to an ethanol aqueous solution having a concentration of 80%, and then the pH was adjusted to 4-5, and the mixture was stirred and hydrolyzed for 45 minutes to form a hydrolyzate; Then, the dispersed intermediate product solution was slowly added to the hydrolyzate and magnetically stirred at 60°C for 6 hours; finally, it was centrifugally washed with anhydrous ethanol for 3 times and vacuum dried at 60°C to prepare the homemade modified nano-silica; The preparation method of the modified polyacrylamide comprises the following steps: placing homemade modified nano-silica into deionized water, then adding KH-550, and ultrasonically treating for 1 hour; adding acrylamide monomer and ammonium persulfate, and stirring at room temperature for 0.5 hour; after stirring, degassing the mixed solution and sealing it in a nitrogen atmosphere; then placing it in a water bath at 60°C, and continuing the reaction for 32 hours, and finally completely drying the obtained product at room temperature, and then immersing it in phosphoric acid with a mass concentration of 2% for 48 hours, taking it out and drying it, so as to prepare the modified polyacrylamide.

8. The method for preparing the special anti-flying agent for cigars according to any one of claims 1 to 6, characterized in that: The preparation method of the special anti-flying agent for cigars comprises the following steps: placing modified vegetable oil and propylene glycol in a stirrer and stirring for 2 minutes; subsequently adding an anti-drifting agent and an organosilicon wetting agent and continuing stirring for 5 minutes; and finally adding a surfactant and a sedimentation agent and continuing stirring for 2 minutes, thereby preparing the special anti-flying agent for cigars.

9. The method for preparing the special anti-fly agent for cigars according to claim 8, characterized in that: The stirring rate during the preparation and synthesis process of the special anti-flying auxiliary agent for cigars is 80-120r / min.

10. Use of the special flying control auxiliary agent for cigar tobacco according to any one of claims 1 to 6 in field control, characterized in that: The mass percentage of the special anti-flying agent for cigar tobacco in the anti-flying liquid is 1-2%.

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