A special fly control auxiliary agent for cigars and its preparation method and application

Abstract

The present invention discloses a special flying control agent for cigars, a preparation method thereof, and an application thereof, belonging to the technical field of flying control agents. The agent is composed of the following components by weight: 25-40 parts of modified vegetable oil, 8-15 parts of an anti-drift agent, 5-8 parts of an organosilicon wetting agent, 1-2 parts of a surfactant, 1-2 parts of a sedimentation agent, and 30-50 parts of glycerol. The anti-drift agent in the special flying control agent for cigars of the present invention contains a sulfonic acid group that can form hydrogen bonds with the polar group hydroxyl group of the thick waxy layer on the cigar tobacco leaves, thereby improving the spreadability and retention of the flying control agent, making the cigar tobacco leaves more resistant to rain erosion, achieving more efficient coverage even on tobacco leaves with certain wrinkles, and preventing rebound of droplets to the greatest extent after impacting the cigar leaves, making the agent particularly suitable for use in cigar tobacco leaves, thereby improving the utilization rate of the flying control agent.

Description

Technical Field

[0001] The invention belongs to the technical field of fly control adjuvants, and specifically relates to a special fly control adjuvant for cigars, a preparation method and application thereof. Background Art

[0002] Cigar tobacco is a plant with a high sugar content. During the cultivation process, it is often subject to various pests, such as tobacco budworms, aphids, cotton bollworms, armyworms, tobacco borers, tobacco beetles, etc. These pests pose a serious threat to the growth and yield of tobacco, and prevention and control measures are essential.

[0003] Conventional manual backpack and ground spray machines require access to the ground, which can crush crops, reduce cigar yields, and impact cigar quality. Furthermore, both manual backpack and ground spray machines expose operators to toxic environments, posing a significant risk to personal safety over time.

[0004] The use of drone spraying for pest control is not restricted by terrain factors and can be carried out over large areas. It is also suitable for plantations on hillsides. However, it is particularly important to choose appropriate aerial spraying adjuvants to improve the control effect.

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

[0006] However, its defect is that the polyoxyethylene ether phosphate it contains 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 will occur, affecting the chemical stability of the fertilizer; and the pesticides that the state has expressly prohibited from use in tobacco fields include benzene hexachloride, DTT, organophosphorus, etc.

[0007] The most critical point is that the wax layer on the surface of cigar leaves is significantly thicker than that of most common crops. This thicker wax layer makes it more difficult for spray droplets to spread and adhere to the leaf surface. Currently available fly dander control adjuvants are not specifically optimized for the specific characteristics of cigar leaves.

[0008] Therefore, in order to fill the technical gap in the market, the present application provides a special anti-fly agent for cigars and its preparation method and application. Summary of the Invention

[0009] To address the deficiencies of the above-mentioned technical solutions, the present invention aims to provide a special anti-flying agent for cigars, its preparation method, and its use. The present invention can achieve this objective through the following technical solution: The special anti-flying agent for cigars comprises: 25-40 parts modified vegetable oil, 8-15 parts anti-drift agent, 5-8 parts organosilicon wetting agent, 1-2 parts surfactant, 1-2 parts sedimentation agent, and 30-50 parts glycerol.

[0010] The modified vegetable oil is one or more of soybean oil, corn oil, and castor oil, which are esterified to form fatty acid methyl ester and / or fatty acid ethyl ester;

[0011] The anti-drifting auxiliary agent is modified polyacrylamide;

[0012] The modified monomer of the modified polyacrylamide includes self-made modified nano-silica.

[0013] The preparation method of the homemade modified nano-silica is as follows: 3g of nano-silica is dispersed in 100ml of deionized water, and ultrasonic treatment is performed for 1h to ensure that the nano-silica is fully dispersed to form a mixed solution; 5g of mercaptopropylmethyldimethoxysilane and 0.5ml of hydrochloric acid with a mass concentration of 37% are added to 200ml of deionized water; the mixture is reacted for 6h under magnetic stirring to form a dispersion; the nano-silica mixture is then slowly added to the dispersion, and magnetic stirring is continued for 2h; then 30ml of H2O2 with a mass concentration of 30% and 10ml of H2SO4 with a mass concentration of 3% are added to the dispersion; high-speed magnetic stirring is performed at 45 degrees Celsius for 12h, and finally, the mixture is centrifuged and washed three times with anhydrous ethanol to remove unreacted reagents, thereby preparing an intermediate product.

[0014] 3 g of the intermediate product was dispersed in 100 ml of anhydrous ethanol and ultrasonically treated for 45 minutes to form an intermediate product solution; then, 2 g of KH-570 was added to 50 ml of 80% ethanol aqueous solution, and then glacial acetic acid was added dropwise to adjust the pH to 4-5, and stirred for hydrolysis for 45 minutes to form a hydrolyzate; then, the dispersed intermediate product solution was slowly added to the hydrolyzate, and the reaction was magnetically stirred at 60 degrees Celsius for 6 hours; finally, the mixture was centrifuged and washed three times with anhydrous ethanol and vacuum dried at 60°C to prepare the homemade modified nano-silica.

[0015] The preparation and synthesis method of the modified polyacrylamide comprises the following steps: placing 3 g of homemade modified nano-silica into 150 ml of deionized water, subsequently adding 0.2 g of KH-550, and ultrasonically treating the mixture for 1 hour; adding 20 g of acrylamide monomer and 0.3 g of ammonium persulfate, and stirring the mixture at room temperature for 0.5 hour; after stirring, degassing the mixed solution and sealing it in a nitrogen atmosphere to remove dissolved oxygen; then placing the reaction vessel in a water bath at 60 degrees Celsius for a free radical polymerization reaction for 32 hours; and finally completely drying the obtained product at room temperature, then immersing it in 2% phosphoric acid for 48 hours, and then removing it and drying it to prepare the modified polyacrylamide.

[0016] The organosilicon wetting agent is one of Silwet L-77 and Silwet 408;

[0017] The surfactant is one of fatty alcohol polyoxyethylene ether and castor oil polyoxyethylene ether;

[0018] The precipitant is one or both of urea and sodium chloride.

[0019] Furthermore, the GAS number of the mercaptopropylmethyldimethoxysilane used to modify the nano-silica is 31001-77-1;

[0020] Furthermore, the modified vegetable oil is purchased from Guangzhou Chubu Chemical Co., Ltd., and other commercially available products can also be purchased;

[0021] The preparation method of the special fly control agent for cigars comprises the following steps: placing modified vegetable oil and glycerol in a blender and stirring for 2 minutes; subsequently adding an anti-drift agent and an organosilicon wetting agent and continuing to stir for 5 minutes; finally adding a surfactant and a sedimentation agent and continuing to stir for 2 minutes, thereby preparing the special fly control agent for cigars;

[0022] The stirring rate during the preparation and synthesis process of the special fly control auxiliary agent for cigars is 80-120 r / min.

[0023] The mass percentage of the special cigar tobacco fly control auxiliary agent in the fly control liquid is 1-2%.

[0024] The present invention has the beneficial effects:

[0025] 1. The anti-drift agent in the special aerial spraying agent for cigars of the present invention is a modified polyacrylamide. The modified polyacrylamide is introduced during the preparation and synthesis process. After being added to the aerial spraying solution, the macromolecular chain segments in the modified polyacrylamide are curled, forming a three-dimensional network structure with a low degree of cross-linking. When applied to the aerial spraying field, this three-dimensional network structure can significantly increase the viscosity of the aerial spraying solution. The increased viscosity significantly inhibits the degree of droplet breakage in the high-speed airflow of the drone, greatly reducing the formation of small droplets smaller than 100 μm that drift from the solution. Furthermore, the synergistic effect of the two can enhance the toughness of the droplets and improve the shear resistance, allowing the integrity of the droplets to be maintained during the drone spraying process, reducing the risk of droplet drift, and making it more resistant to the shear force of high-speed drone spraying, less likely to cause nozzle clogging.

[0026] 2. The anti-drift agent in the special flying control agent for cigars of the present invention contains a sulfonic acid group, which can form hydrogen bonds with the polar group hydroxyl group of the thick wax layer on the cigar tobacco leaves, thereby improving the spreadability and retention of the flying control liquid, making the cigar tobacco leaves more resistant to rain erosion; more efficient coverage can be achieved even for tobacco leaves with certain wrinkles; and the droplets are prevented from rebounding to the greatest extent after impacting the cigar leaves, making it particularly suitable for use in cigar tobacco leaves, thereby improving the utilization rate of the flying control agent. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with Examples. The illustrative embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention. In addition, 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 smaller range between the intermediate value within any stated value or stated range and any other stated value or intermediate value within the range is also included in the present invention. The upper and lower limits of these smaller ranges may be independently included or excluded within the scope.

[0028] Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein may also be used in the practice 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 associated with the documents. In the event of any conflict with any incorporated document, the contents of this specification shall prevail.

[0029] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments described herein without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from the description of the invention. The description and examples are intended to be exemplary only.

[0030] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0031] The "parts" indicated in the following examples are all parts by weight.

[0032] Example 1

[0033] A special anti-drift auxiliary agent for cigars comprises the following ingredients, calculated by weight: 25 parts of modified vegetable oil, 8 parts of anti-drift auxiliary agent, 5 parts of organosilicon wetting agent, 1 part of surfactant, 1 part of sedimentation agent, and 30 parts of glycerol.

[0034] 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;

[0035] The anti-drifting auxiliary agent is modified polyacrylamide;

[0036] The modified monomer of the modified polyacrylamide includes self-made modified nano-silica.

[0037] The preparation method of the homemade modified nano-silica is as follows: 3g of nano-silica is dispersed in 100ml of deionized water, and ultrasonic treatment is performed for 1h to ensure that the nano-silica is fully dispersed to form a mixed solution; 5g of mercaptopropylmethyldimethoxysilane and 0.5ml of 37% hydrochloric acid are added to 200ml of deionized water; the mixture is reacted for 6h under magnetic stirring to form a dispersion; the nano-silica mixture is then slowly added to the dispersion and magnetic stirring is continued for 2h; 30ml of 30% H2O2 and 10ml of 3% H2SO4 are subsequently added to the dispersion; and the mixture is heated at 45 degrees Celsius. The reaction mixture was stirred at high speed magnetic stirring for 12 hours, and finally centrifuged and washed three times with anhydrous ethanol to remove unreacted reagents to prepare the intermediate product; 3g of the intermediate product was dispersed in 100ml of anhydrous ethanol and ultrasonically treated for 45min; 2g of KH-570 was added to 50ml of 80% ethanol aqueous solution, and then glacial acetic acid was added dropwise to adjust the pH to 4-5, and stirred and hydrolyzed for 45min to form a hydrolyzate; then the dispersed intermediate product solution was slowly added to the hydrolyzate, and magnetically stirred at 60 degrees Celsius for 6h; finally, the reaction mixture was centrifuged and washed three times with anhydrous ethanol, and vacuum dried at 60℃ to prepare the homemade modified nano-silica.

[0038] The GAS number of the mercaptopropylmethyldimethoxysilane used to modify the nano-silica is 31001-77-1.

[0039] The preparation and synthesis method of the modified polyacrylamide comprises the following steps: placing 3 g of homemade modified nano-silica into 150 ml of deionized water, subsequently adding 0.2 g of KH-550, and ultrasonically treating the mixture for 1 hour; adding 20 g of acrylamide monomer and 0.3 g of ammonium persulfate, and stirring the mixture at room temperature for 0.5 hour; after stirring, degassing the mixed solution and sealing it in a nitrogen atmosphere to remove dissolved oxygen; then placing the reaction vessel in a water bath at 60 degrees Celsius for a free radical polymerization reaction for 32 hours; and finally completely drying the obtained product at room temperature, then immersing it in 2% phosphoric acid for 48 hours, and then removing it and drying it to prepare the modified polyacrylamide.

[0040] The organosilicon wetting agent is Silwet L-77;

[0041] The surfactant is fatty alcohol polyoxyethylene ether;

[0042] The sedimentation agent is a mixture of urea and sodium chloride.

[0043] The preparation method of the special fly control agent for cigars comprises the following steps: placing 25 parts of modified vegetable oil and 30 parts of propylene glycol in a blender, and stirring at 80-120 r / min for 2 minutes; subsequently adding 8 parts of an anti-drift agent and 5 parts of an organosilicon wetting agent, and continuing stirring for 5 minutes; and finally adding 1 part of a surfactant and 1 part of a sedimentation agent, and continuing stirring for 2 minutes, thereby preparing the special fly control agent for cigars.

[0044] Example 2

[0045] A special anti-drift agent for cigars, comprising the following ingredients by weight: 30 parts of modified vegetable oil, 10 parts of anti-drift agent, 6 parts of organosilicon wetting agent, 1.5 parts of surfactant, 1.5 parts of sedimentation agent, and 37 parts of glycerol;

[0046] The modified vegetable oil is corn oil or castor oil, and the fatty acid methyl ester and / or fatty acid ethyl ester are formed by esterification;

[0047] The anti-drifting auxiliary agent is modified polyacrylamide;

[0048] The modified monomer of the modified polyacrylamide includes self-made modified nano-silica.

[0049] The organosilicon wetting agent is Silwet 408;

[0050] The surfactant is one of castor oil polyoxyethylene ether;

[0051] The sedimentation agent is sodium chloride;

[0052] In Example 2, the preparation and synthesis methods of the modified polyacrylamide and the preparation method of the special fly control agent for cigars are the same as those in Example 1.

[0053] Example 3

[0054] A special anti-drift agent for cigars, comprising the following ingredients by weight: 35 parts of modified vegetable oil, 12 parts of anti-drift agent, 7 parts of organosilicon wetting agent, 1.5 parts of surfactant, 1.5 parts of sedimentation agent, and 44 parts of glycerol;

[0055] The modified vegetable oil is fatty acid methyl ester and / or fatty acid ethyl ester formed by esterification of castor oil;

[0056] The anti-drifting auxiliary agent is modified polyacrylamide;

[0057] The modified monomer of the modified polyacrylamide includes self-made modified nano-silica.

[0058] The organosilicon wetting agent is Silwet 408;

[0059] The surfactant is fatty alcohol polyoxyethylene ether;

[0060] The sedimentation agent is a mixture of urea and sodium chloride;

[0061] In Example 2, the preparation and synthesis methods of the modified polyacrylamide and the preparation method of the special fly control agent for cigars are the same as those in Example 1.

[0062] Example 4

[0063] A special anti-drift agent for cigars, comprising the following ingredients by weight: 40 parts of modified vegetable oil, 15 parts of anti-drift agent, 8 parts of organosilicon wetting agent, 2 parts of surfactant, 2 parts of sedimentation agent, and 50 parts of glycerol;

[0064] The modified vegetable oil is fatty acid methyl ester and / or fatty acid ethyl ester formed by esterification of soybean oil and corn oil;

[0065] The anti-drifting auxiliary agent is modified polyacrylamide;

[0066] The modified monomer of the modified polyacrylamide includes self-made modified nano-silica.

[0067] The organosilicon wetting agent is Silwet L-77;

[0068] The surfactant is fatty alcohol polyoxyethylene ether;

[0069] The sedimentation agent is urea;

[0070] In Example 2, the preparation and synthesis methods of the modified polyacrylamide and the preparation method of the special fly control agent for cigars are the same as those in Example 1.

[0071] Comparative Example 1

[0072] A special anti-drift agent for cigars, comprising the following ingredients by weight: 35 parts of modified vegetable oil, 12 parts of anti-drift agent, 7 parts of organosilicon wetting agent, 1.5 parts of surfactant, 1.5 parts of sedimentation agent, and 44 parts of glycerol;

[0073] The modified vegetable oil is fatty acid methyl ester and / or fatty acid ethyl ester formed by esterification of castor oil;

[0074] The anti-drift additive is polyacrylamide, which is directly purchased from Henan Tianfu Chemical Co., Ltd.

[0075] The organosilicon wetting agent is Silwet 408;

[0076] The surfactant is fatty alcohol polyoxyethylene ether;

[0077] The sedimentation agent is a mixture of urea and sodium chloride;

[0078] The difference between Comparative Example 1 and Example 3 is that the modification of the anti-drifting agent is omitted, and commercially available polyacrylamide is directly added instead.

[0079] Comparative Example 2

[0080] A special anti-drift agent for cigars, comprising the following ingredients by weight: 35 parts of modified vegetable oil, 12 parts of anti-drift agent, 7 parts of organosilicon wetting agent, 1.5 parts of surfactant, 1.5 parts of sedimentation agent, and 44 parts of glycerol;

[0081] The modified vegetable oil is fatty acid methyl ester and / or fatty acid ethyl ester formed by esterification of castor oil;

[0082] The anti-drifting agent is a physical blend of commercially available polyacrylamide and modified monomer-made modified nano-silica;

[0083] The organosilicon wetting agent is Silwet 408;

[0084] The surfactant is fatty alcohol polyoxyethylene ether;

[0085] The sedimentation agent is a mixture of urea and sodium chloride;

[0086] The difference between Comparative Example 2 and Example 3 is that the anti-drifting agent is replaced from modified polyacrylamide to a physical blend of commercially available polyacrylamide and modified monomer-made modified nano-silica.

[0087] Comparative Example 3

[0088] A special anti-drift agent for cigars, comprising the following ingredients by weight: 35 parts of modified vegetable oil, 12 parts of anti-drift agent, 7 parts of organosilicon wetting agent, 1.5 parts of surfactant, 1.5 parts of sedimentation agent, and 44 parts of glycerol;

[0089] The modified vegetable oil is fatty acid methyl ester and / or fatty acid ethyl ester formed by esterification of castor oil;

[0090] The anti-drift additive is homemade modified nano-silica; its specific preparation method is the same as that in Example 3;

[0091] The organosilicon wetting agent is Silwet 408;

[0092] The surfactant is fatty alcohol polyoxyethylene ether;

[0093] The sedimentation agent is a mixture of urea and sodium chloride;

[0094] The difference between Comparative Example 3 and Example 3 is that the subsequent modification of the anti-drift agent is omitted, and instead an equal amount of modified monomer is directly added to prepare the modified nano-silica.

[0095] Comparative Example 4

[0096] A special fly control auxiliary agent for cigars, comprising the following ingredients by weight: 35 parts of modified vegetable oil, 7 parts of organosilicon wetting agent, 1.5 parts of surfactant, 1.5 parts of sedimentation agent, and 44 parts of glycerol;

[0097] The modified vegetable oil is fatty acid methyl ester and / or fatty acid ethyl ester formed by esterification of castor oil;

[0098] The organosilicon wetting agent is Silwet 408;

[0099] The surfactant is fatty alcohol polyoxyethylene ether;

[0100] The sedimentation agent is a mixture of urea and sodium chloride;

[0101] The difference between Comparative Example 4 and Example 3 is that the addition of the anti-drifting agent is directly omitted.

[0102] Test example

[0103] The experiment was set up in a tobacco and cigar-growing field in Baoshan City, Yunnan Province, and the cigar variety tested was Yunxue 38;

[0104] Anti-drift performance test: DJI T30 agricultural drone, nozzle model: XR11001VS, operating flight speed 5m / s, relative crop height 2m, liquid volume per mu 1.5L per mu, spraying rate 0.5L / min, in a breeze of 3m / s~5.2m / s, the flight direction is perpendicular to the wind direction, and water-sensitive paper is placed vertically at a fixed position 1m horizontally and 10m vertically from the flight path downwind of the aircraft's flight path. For each liquid, repeat the spraying three times; then take five 1cm squares on each water-sensitive paper. 2 The drift amount is determined by averaging the number of droplets in the circle and the base circle. Specifically, the drift suppression rate = (number of drift droplets in the blank control group - number of drift droplets in the experimental group) / number of drift droplets in the experimental group.

[0105] Among them, the blank control group is the pesticide adjuvant without any anti-drift adjuvant added; the test results are shown in Table 1.

[0106] Aphid control rate test: Cigar tobacco fields with aphid infestations were selected. The pesticide adjuvants used were: 420g / L tebuconazole 20ml / mu + 2.5% lambda-cyhalothrin 30ml / mu + 98% potassium dihydrogen phosphate 50g / mu. The relevant parameters of the drone were set according to the anti-drift performance test.

[0107] Among them, 25 ml of the cigar tobacco-specific fly control adjuvant prepared in Examples 1-4 and Comparative Examples 1-4 was added to every 1 L of liquid, and the liquid dosage per mu was 1.5 L / mu; 3 days after the operation was completed, the aphid control effect on the cigar tobacco leaves was counted;

[0108] Among them, the blank control group is the pesticide adjuvant without any anti-drift adjuvant added; the test results are shown in Table 1.

[0109] Table 1

[0110]

[0111] Comprehensive performance analysis: Examples 1-4 using the technical solution of the present invention all have good drift suppression rates, with the drift suppression rates reaching an average of 80%; and have good drift suppression effects, so that the aphid control rate can reach an average of about 95%, so that the use of drones to spray liquid medicine also has excellent pest control effects.

[0112] Comparative Example 1 uses commercially available polyacrylamide, Comparative Example 2 additionally adds the modified monomers of Examples 1-4, and Comparative Example 3 only adds the modified monomers; there are significant performance differences between the various properties of Comparative Examples 1-4 and Examples 1-4; the possible reason is that in Examples 1-4 of the present application, the anti-drift additive introduced is modified polyacrylamide, and the two act synergistically through the free radical polymerization reaction of the modified monomer; the anti-drift additive of Examples 1-4 contains sulfonic acid groups, which can form hydrogen bonds with the polar group hydroxyl groups of the thick wax layer on the cigar tobacco leaves, thereby improving the spreadability and retention of the flying spray liquid, making the cigar tobacco leaves more resistant to rain erosion; more efficient coverage can be achieved even for tobacco leaves with certain wrinkles; and the droplets are prevented from rebounding to the greatest extent after hitting the cigar leaves, which is particularly suitable for the use scenarios of cigar tobacco leaves; and the utilization rate of the flying spray agent is improved.

[0113] Surface Tension Test: The fly control agents for cigars prepared in Examples 1-4 and Comparative Examples 1-4 were diluted 1000-fold with deionized water. The static surface tension of the dilutions was measured using a DSA-100 optical contact angle meter. Deionized water served as a blank control group. The test results are shown in Table 2.

[0114] Viscosity performance test: 1% concentration of the fly control agent prepared in Examples 1-4 and Comparative Examples 1-4 was added to the liquid medicine; and the viscosity of the liquid medicine after adding the fly control agent for cigars was tested using a capillary viscometer method;

[0115] The static surface tension of the dilution was measured using an optical contact angle meter DSA-100;

[0116] Among them, the liquid without the addition of the fly control adjuvant was set as the blank control group; the test results are shown in Table 2.

[0117] Table 2

[0118]

[0119] Comprehensive performance analysis: In Comparative Example 3, although modified monomers and polyacrylamide are added at the same time, there is a significant performance gap compared with Example 3, indicating that the preparation method of modified polyacrylamide in Examples 1-4 is the key to achieving such excellent technical effects. The possible reason is that the anti-drifting auxiliary agent in the special flying control auxiliary agent for cigars is modified polyacrylamide. The modified polyacrylamide introduced during the preparation and synthesis process, after being added to the flying control liquid, the macromolecular chain segments in the modified polyacrylamide are in a curled state, forming a three-dimensional network structure with a low degree of cross-linking; this three-dimensional network structure When the structure is applied to the field of aerial spraying, it can significantly increase the viscosity of the aerial spraying liquid; the increase in viscosity significantly inhibits the degree of droplet breakage in the high-speed airflow of the drone, greatly reducing the generation of small droplets smaller than 100μm that drift from the solution; and under the synergistic effect of the two, it can enhance the toughness of the droplets and improve the shear resistance, so that the drone can maintain the integrity of the droplets during the spraying process; reduce the risk of droplet drift; and be more resistant to the shear force of high-speed spraying by the drone, and less likely to cause nozzle clogging; and the reduction in surface tension also makes the droplets sprayed by the drone more easily attached to cigar tobacco leaves.

[0120] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A special fly control auxiliary agent for cigars, characterized in that: The composition is as follows in parts by weight: 25-40 parts of modified vegetable oil, 8-15 parts of anti-drift agent, 5-8 parts of silicone wetting agent, 1-2 parts of surfactant, 1-2 parts of sedimentation agent, and 30-50 parts of glycerol; the anti-drift agent is a modified polyacrylamide containing a sulfonic acid group; The modified monomer of the modified polyacrylamide includes homemade modified nano-silica; The modified polyacrylamide is prepared by the following method: placing homemade modified nano-silica in deionized water, then adding KH-550, and ultrasonically treating for 1 hour; then 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; finally, completely drying the obtained product at room temperature, then immersing it in phosphoric acid with a mass concentration of 2% for 48 hours, and then taking it out and drying it, thereby preparing the modified polyacrylamide; The homemade modified nano-silica is prepared by the following method: dispersing nano-silica in deionized water and ultrasonically treating the mixture for 1 hour to form a mixed solution; adding mercaptopropylmethyldimethoxysilane and hydrochloric acid to the deionized water; reacting the mixture under magnetic stirring for 6 hours 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 the mixture with anhydrous ethanol three times to prepare an intermediate product; The intermediate product was dispersed in anhydrous ethanol and ultrasonically treated for 45 minutes; KH-570 was added to an 80% ethanol aqueous solution, and then the pH was adjusted to 4-5, and the mixture was stirred and hydrolyzed for 45 minutes to form a hydrolyzate; Subsequently, the dispersed intermediate product solution was slowly added to the hydrolyzate and magnetically stirred at 60°C for 6 hours; finally, the product was centrifugally washed three times with anhydrous ethanol and vacuum dried at 60°C to prepare the homemade modified nano-silica.

2. The special fly control auxiliary agent for cigars according to claim 1, characterized in that The composition is as follows in parts by weight: 35 parts of modified vegetable oil, 12 parts of anti-drift additive, 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 auxiliary agent 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 fly control auxiliary agent for cigars according to claim 1, characterized in that The organosilicon wetting agent is one of Silwet L-77 and Silwet 408.

5. The special fly control auxiliary agent 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 agent for cigars according to claim 1, characterized in that The precipitant is one or both of urea and sodium chloride.

7. The method for preparing the special fly control agent for cigars according to any one of claims 1 to 6, characterized in that: The preparation method of the special fly prevention agent for cigars comprises the following steps: placing modified vegetable oil and glycerol in a blender and stirring for 2 minutes; subsequently adding an anti-drift agent and an organosilicon wetting agent and continuing to stir for 5 minutes; and finally adding a surfactant and a sedimentation agent and continuing to stir for 2 minutes, thereby preparing the special fly prevention agent for cigars.

8. The method for preparing the special fly control auxiliary agent for cigars according to claim 7, characterized in that: The stirring rate during the preparation and synthesis process of the special fly control auxiliary agent for cigars is 80-120 r / min.

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

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