Insect luring plate containing pheromone-urea resin microcapsules and preparation method of insect luring plate

Abstract

The invention discloses an insect trapping plate containing pheromone-urea resin microcapsules. The insect trapping plate comprises colored body paper or a fiber material, a barrier release layer containing the pheromone-urea resin microcapsules and insect sticking glue, the barrier layer containing the pheromone-urea resin microcapsule is prepared from 1 to 3 parts of pheromone, 95 to 97 parts of urea resin and 1 to 3 parts of an emulsifier; wherein the pheromone is composed of a plurality of components selected from trans-2-hexenal, 1-pentene-3-alcohol, violet ketone, linalool, cis-3-hexene-1-alcohol, and phenoxyethanol, and the pheromone is composed of a plurality of components selected from the group consisting of 2-hexenal, 1-pentene-3-alcohol, violet ketone, linalool, cis-3-hexene-1 The urea-formaldehyde resin is urea-formaldehyde resin jointly modified by melamine and polyvinyl alcohol. The invention further provides a preparation method of the insect trapping plate containing the pheromone-urea resin microcapsules. The insect trapping plate provided by the invention releases pheromones in a long-acting manner, and the insect trapping effect is lasting; and after being buried, the fertilizer can be used as a fertilizer to provide nitrogen necessary for growth of crops.

Description

Technical Field

[0001] The technical scheme mainly relates to the technical field of agricultural pest trapping, and specifically to an insect trapping board containing pheromone-urea-formaldehyde resin microcapsules and a preparation method thereof. Background Art

[0002] In the fields of agriculture and horticulture, insect traps are a common insect trapping tool used to attract and capture pests, thereby reducing the number of pests. Traditional insect traps usually use attractive insect pheromones to attract target pests. Traditional insect traps fix insect pheromones on the surface of the insect trap through a trap core, and then attract pests by releasing odor. Since insect pheromones are easily affected by environmental factors such as light, temperature and humidity, in practical applications, the insect pheromone release effect of traditional insect traps may be unstable or not lasting. Moreover, the price of the trap core is relatively expensive, which limits the promotion of this type of insect trap. Therefore, a new technical solution is needed to improve the existing insect traps and solve the problems existing in the prior art. Summary of the invention

[0003] In order to achieve the above purpose, this technical solution mainly adopts the following technical means:

[0004] An insect attractant board containing pheromone-urea-formaldehyde resin microcapsules, specifically comprising: colored base paper or fiber material, a barrier release layer containing pheromone-urea-formaldehyde resin microcapsules, and insect glue;

[0005] The barrier layer containing pheromone-urea-formaldehyde resin microcapsules is composed of 1-3 parts of pheromone, 95-97 parts of urea-formaldehyde resin and 1-3 parts of emulsifier;

[0006] wherein the pheromone is composed of a plurality of trans-2-hexenal, 1-penten-3-ol, ionone, linalool, cis-3-hexen-1-ol and phenoxyethanol;

[0007] The urea-formaldehyde resin is a urea-formaldehyde resin modified by melamine and polyvinyl alcohol.

[0008] Preferably, the colored base paper may include one or more of colored white cardboard and colored coated base paper.

[0009] Preferably, the thickness of the colored base paper or fiber material is 0.20 mm to 0.35 mm, and the waterproof performance value is 8 to 12 g / m 2 .

[0010] Preferably, the emulsifier is an anionic emulsifier, including one or more of sodium dodecyl sulfate, hexadecyltrimethylammonium bromide, Span 60, Span 80, Tween 60, and Tween 80.

[0011] Preferably, the sticky glue includes one or more of polyester pressure-sensitive adhesive, rubber pressure-sensitive adhesive and acrylic ester.

[0012] The present invention also provides a method for preparing the insect attractant board containing pheromone-urea-formaldehyde resin microcapsules, comprising the following steps:

[0013] (1) Synthesis of urea-formaldehyde resin pre-shrinkage liquid: 1-5 parts of melamine and 1-5 parts of polyvinyl alcohol are added to 30-45 parts of formaldehyde solution, alkali is added to adjust the pH to 8-10, and the temperature is raised to 50-55°C for reaction; then a certain amount of urea and deionized water are added, the temperature is raised for reaction for a certain time, and then a certain amount of urea is added, and the temperature is kept constant for reaction for 1 hour to obtain a water-soluble clear and transparent urea-formaldehyde prepolymer, which is cooled and set aside for use;

[0014] (2) adding a certain amount of insect pheromone to n-hexane and stirring evenly, then adding the mixture to the urea-formaldehyde resin pre-shrinkage solution, adding a certain amount of emulsifier and polyvinyl alcohol, and dispersing the mixture at a stirring speed of 2000 r / min for 30 min to form a stable water-in-oil emulsion, dropping a certain amount of urea-formaldehyde prepolymer into the above mixed solution, adjusting the pH value of the system to 2-3 with 0.1 mol / L ammonium chloride, slowly raising the temperature in a water bath until the temperature reaches 60° C., stirring the mixture at high speed (10000 rpm) for 3 h with a high shear emulsifier to promote the formation of microcapsules, and adjusting the viscosity to a suitable value with deionized water to obtain an emulsion containing pheromone-urea-formaldehyde resin microcapsules;

[0015] (3) adding the above-mentioned emulsion containing pheromone-urea-formaldehyde resin microcapsules into a mixed solution consisting of nanocellulose, styrene-butadiene latex, titanium dioxide, silane coupling agent and glyoxal in a certain proportion;

[0016] (4) spraying the mixed solution onto the softwood colored coated base paper using a coating device, and rolling up to obtain an insect attractant board substrate;

[0017] (5) The coiled material is cut into pieces, the surface is coated with insect glue, holes are punched, and release paper is applied to obtain a finished insect attractant board.

[0018] Preferably, in step (3), the addition ratio of the emulsion containing pheromone-urea-formaldehyde resin microcapsules is 3-10% of the mixed solution.

[0019] Compared with the prior art, this technical solution mainly solves the following technical problems:

[0020] 1. Improve the insect attracting effect: By using microcapsule technology to embed insect pheromones in urea-formaldehyde resin pre-shrinkage liquid, and applying the coating on waterproof paper to make paper-based insect attracting boards, insect pheromones can be released more effectively and the attracting effect of the insect attracting boards can be improved.

[0021] 2. Increased durability: Microcapsule technology can stably encapsulate pheromones and prolong their release time, making the paper-based insect attractant board more durable and able to continuously attract insects for a longer period of time, increasing the insect capture rate; at the same time, it can avoid the problems of high cost and short-term insect attraction brought by traditional insect attractant core attractants.

[0022] 3. Environmentally friendly and sustainable: The insect trap is made of paper-based materials, which is environmentally friendly. At the same time, the microcapsule technology can stably encapsulate pheromones to avoid excessive release and environmental pollution, which is highly environmentally friendly and sustainable. DETAILED DESCRIPTION

[0023] The present invention is further described in conjunction with the following examples, but the protection scope of the present invention is not limited thereto. Explanation for the examples: The raw materials used in the following examples are not limited to the raw materials required for this application, and are only used for writing the examples.

[0024] Example 1

[0025] An insect attractant board containing pheromone-urea-formaldehyde resin microcapsules and a preparation method thereof comprises the following steps:

[0026] (1) Synthesis of urea-formaldehyde resin pre-shrinkage liquid: add 3 parts of melamine and 3 parts of polyvinyl alcohol to 30-45 parts of formaldehyde solution, add triethanolamine to adjust the pH to 8-10, and heat to 50-55°C for reaction; then add 10 parts of urea and 5 parts of deionized water, heat to react for a certain time, then add 10 parts of urea, and react at a constant temperature for 1 hour to obtain a water-soluble clear and transparent urea-formaldehyde prepolymer, which is cooled and set aside for use;

[0027] (2) Add a mixture of green leafhopper insect pheromones, including trans-2-hexenal, 1-penten-3-ol, ionone, linalool, cis-3-hexen-1-ol and phenoxyethanol (weight ratio of 1:1:1:1:5:15) into n-hexane and stir evenly to prepare a concentration of 10 mg / mL. Take 10 ml of the pheromone n-hexane mixture and add it into 50 ml of urea-formaldehyde resin pre-shrinkage liquid. Take 5 ml of Tween 60 and 5 ml of polyvinyl alcohol and add them into the mixture. r / min stirring speed for 30 minutes to form a stable water-in-oil emulsion, 50 ml of urea-formaldehyde prepolymer was added dropwise to the mixed solution, 0.1 mol / L ammonium chloride was used to adjust the pH value of the system to 3, the water bath was slowly raised, and after the temperature reached 60°C, a high-shear emulsifier was used to stir at high speed (10000 rpm) for 3 hours to promote the formation of microcapsules, and deionized water was used to adjust the viscosity to a suitable level, and the solution pH was adjusted to 6 to obtain an emulsion containing pheromone-urea-formaldehyde resin microcapsules;

[0028] (3) adding 3% of the above-mentioned emulsion containing pheromone-urea-formaldehyde resin microcapsules into a mixed solution consisting of 80 parts of nanocellulose, 15 parts of styrene-butadiene latex, 5 parts of titanium dioxide, 1 part of silane coupling agent, and 1 part of glyoxal (by mass);

[0029] (4) spraying the mixed solution onto the colored base paper (yellow) by using a coating device, and rolling up to obtain the insect attractant board substrate;

[0030] (5) The coiled material is cut into pieces, the surface is coated with insect glue, holes are punched, and release paper is applied to obtain a finished insect attractant board.

[0031] Example 2

[0032] An insect attractant board containing pheromone-urea-formaldehyde resin microcapsules and a preparation method thereof comprises the following steps:

[0033] (1) Synthesis of urea-formaldehyde resin pre-shrinkage liquid: 4 parts of melamine and 4 parts of polyvinyl alcohol are added to 30-45 parts of formaldehyde solution, triethanolamine is added to adjust the pH to 8-10, and the temperature is raised to 50-55°C for reaction; then 15 parts of urea and 5 parts of deionized water are added, the temperature is raised for reaction for a certain period of time, and then 15 parts of urea are added and the temperature is kept constant for reaction for 1 hour to obtain a water-soluble clear and transparent urea-formaldehyde prepolymer, which is cooled and set aside for use;

[0034] (2) Add the mixture of thrips insect pheromone, ionone, linalool and cis-3-hexen-1-ol to n-hexane and stir evenly to prepare a concentration of 10 mg / mL; take 20 ml of the insect pheromone n-hexane mixture and add it to 60 ml of urea-formaldehyde resin pre-contracted liquid; weigh 5 ml of emulsifier and 5 ml of polyvinyl alcohol and add them to the above mixture; disperse for 30 min at a stirring speed of 2000 r / min to form a stable water-in-oil emulsion; add 50 ml of urea-formaldehyde prepolymer dropwise to the above mixed solution; adjust the pH value of the system to 2.5 with 0.1 mol / L ammonium chloride; slowly raise the water bath temperature to 65° C.; stir at high speed (10000 rpm) for 3 h with a high shear emulsifier to promote the formation of microcapsules; adjust the viscosity to a suitable value with deionized water; adjust the solution pH to 7 to obtain an emulsion containing pheromone-urea-formaldehyde resin microcapsules;

[0035] (3) adding 5% of the above-mentioned emulsion containing pheromone-urea-formaldehyde resin microcapsules into a mixed solution consisting of 80 parts of nanocellulose, 15 parts of styrene-butadiene latex, 5 parts of titanium dioxide, 1 part of silane coupling agent, and 1 part of glyoxal (by mass);

[0036] (4) spraying the mixed solution onto the colored base paper (blue) by using a coating device, and rolling up to obtain the insect attractant board substrate;

[0037] (5) The coiled material is cut into pieces, the surface is coated with insect glue, holes are punched, and release paper is applied to obtain a finished insect attractant board.

[0038] Example 3

[0039] An insect attractant board containing pheromone-urea-formaldehyde resin microcapsules and a preparation method thereof comprises the following steps:

[0040] (1) Synthesis of urea-formaldehyde resin pre-shrinkage liquid: add 5 parts of melamine and 5 parts of polyvinyl alcohol to 30-45 parts of formaldehyde solution, add triethanolamine to adjust the pH to 8-10, and heat to 50-55°C for reaction; then add 10 parts of urea and 30 parts of deionized water, heat to react for a certain time, then add 10 parts of urea and 50 parts of deionized water, and react at a constant temperature for 1 hour to obtain a water-soluble, clear and transparent urea-formaldehyde prepolymer, which is cooled and set aside for use;

[0041] (2) Add the mixed solution of cabbage moth insect pheromone, trans-2-hexenal, 1-penten-3-ol, ionone and linalool to n-hexane and stir evenly to prepare a concentration of 10 mg / mL; take 30 ml of the n-hexane mixed solution of insect pheromone, weigh 5 ml of emulsifier and 5 ml of polyvinyl alcohol and add them to the mixed solution; disperse them at a stirring speed of 2000 r / min for 30 min to form a stable oil-in-water emulsion; add 40 ml of urea-formaldehyde prepolymer dropwise to the mixed solution; adjust the pH value of the system to 2 with 0.1 mol / L ammonium chloride; slowly raise the temperature in a water bath until the temperature reaches 75°C; stir at high speed (10000 rpm) for 3 h with a high shear emulsifier to promote the formation of microcapsules; adjust the viscosity to a suitable value with deionized water; and adjust the solution pH to 8 to obtain an emulsion containing pheromone-urea-formaldehyde resin microcapsules;

[0042] (3) adding 10% of the above-mentioned emulsion containing pheromone-urea-formaldehyde resin microcapsules into a mixed solution consisting of 80 parts of nanocellulose, 15 parts of styrene-butadiene latex, 5 parts of titanium dioxide, 1 part of silane coupling agent, and 1 part of glyoxal (by mass);

[0043] (4) spraying the mixed solution onto the colored base paper (yellow) by using a coating device, and rolling up to obtain the insect attractant board substrate;

[0044] (5) The coiled material is cut into pieces, the surface is coated with insect glue, holes are punched, and release paper is applied to obtain a finished insect attractant board.

[0045] Comparative Example 1

[0046] An insect attractant board containing pheromone-urea-formaldehyde resin microcapsules and a preparation method thereof comprises the following steps:

[0047] (1) Synthesis of urea-formaldehyde resin pre-shrinkage liquid: add 3 parts of melamine and 3 parts of polyvinyl alcohol to 30-45 parts of formaldehyde solution, add triethanolamine to adjust the pH to 8-10, and heat to 50-55°C for reaction; then add 10 parts of urea and 5 parts of deionized water, heat to react for a certain time, then add 10 parts of urea, and react at a constant temperature for 1 hour to obtain a water-soluble clear and transparent urea-formaldehyde prepolymer, which is cooled and set aside for use;

[0048] (2) Add the green leafhopper insect pheromone to 50 ml of urea-formaldehyde resin pre-shrinkage solution, adjust the system pH value to 3 with 0.1 mol / L ammonium chloride, slowly raise the temperature in a water bath until the temperature reaches 60°C, stir for 3 hours to promote the formation of microcapsules, adjust the viscosity to a suitable level with deionized water, and adjust the solution pH to 6 to obtain a pre-shrinkage solution containing pheromone-urea-formaldehyde resin;

[0049] (3) adding 3% of the pheromone-urea-formaldehyde resin pre-shrinkage liquid to a mixture of 80 parts of nanocellulose, 15 parts of styrene-butadiene latex, 5 parts of titanium dioxide, 1 part of silane coupling agent, and 1 part of glyoxal (by mass);

[0050] (4) spraying the mixed solution onto the colored base paper (yellow) by using a coating device, and rolling up to obtain the insect attractant board substrate;

[0051] (5) The coiled material is cut into pieces, the surface is coated with insect glue, holes are punched, and release paper is applied to obtain a finished insect attractant board.

[0052] Comparative Example 2

[0053] The ordinary blue insect-attracting boards with thrips pheromone attractant cores were hung and purchased from Shandong Haobang Agricultural Technology Co., Ltd.

[0054] Comparative Example 3

[0055] Compared with Example 1, the only difference is that the urea-formaldehyde resin adopts the urea-formaldehyde resin described in CN116473052A.

[0056] The finished insect attractant boards of the above-mentioned embodiments and comparative examples were hung outdoors, and the insect attractant effects were observed for one week. The specific results are shown in the following table.

[0057] Table 1 Results of insect trapping experiment

[0058]

[0059] The insect attracting board of the present invention is systematically tested, and the coating mixed liquid has no stratification and the coating effect is good; the insect attracting effect is good, the duration is long, and the cost is low.

[0060] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. An insect trap containing pheromone-urea-formaldehyde resin microcapsules, characterized in that: It includes colored base paper or fiber material, a barrier release layer containing pheromone-urea-formaldehyde resin microcapsules, and sticky insect glue; The barrier layer containing pheromone-urea-formaldehyde resin microcapsules is composed of 1-3 parts of pheromone, 95-97 parts of urea-formaldehyde resin and 1-3 parts of emulsifier; wherein the pheromone is composed of a plurality of trans-2-hexenal, 1-penten-3-ol, ionone, linalool, cis-3-hexen-1-ol and phenoxyethanol; The urea-formaldehyde resin is a urea-formaldehyde resin modified by melamine and polyvinyl alcohol.

2. The insect attractant containing pheromone-urea-formaldehyde resin microcapsules according to claim 1, characterized in that: The colored base paper may include one or more of colored white card paper and colored coated base paper.

3. The insect attractant containing pheromone-urea-formaldehyde resin microcapsules according to claim 1, characterized in that: The thickness of the colored base paper or fiber material is 0.20mm-0.35mm, and the waterproof performance value is 8-12g / m2.

4. The insect attractant containing pheromone-urea-formaldehyde resin microcapsules according to claim 1, characterized in that: The emulsifier is an anionic emulsifier, including one or more of sodium dodecyl sulfate, hexadecyltrimethylammonium bromide, Span 60, Span 80, Tween 60, and Tween 80.

5. The insect attractant containing pheromone-urea-formaldehyde resin microcapsules as claimed in claim 1, characterized in that: The sticky glue includes one or more of polyester pressure-sensitive adhesive, rubber pressure-sensitive adhesive and acrylic ester pressure-sensitive adhesive.

6. The method for preparing the insect attractant board containing pheromone-urea-formaldehyde resin microcapsules according to any one of claims 1 to 5, characterized in that: The steps include: (1) Synthesis of urea-formaldehyde resin pre-shrinkage liquid: 1-5 parts of melamine and 1-5 parts of polyvinyl alcohol are added to 30-45 parts of formaldehyde solution, alkali is added to adjust the pH to 8-10, and the temperature is raised to 50-55°C for reaction; then a certain amount of urea and deionized water are added, the temperature is raised for reaction for a certain time, and then a certain amount of urea is added, and the temperature is kept constant for reaction for 1 hour to obtain a water-soluble clear and transparent urea-formaldehyde prepolymer, which is cooled and set aside for use; (2) adding a certain amount of insect pheromone to n-hexane and stirring evenly, then adding the mixture to the urea-formaldehyde resin pre-shrinkage solution, adding a certain amount of emulsifier and polyvinyl alcohol, and dispersing the mixture at a stirring speed of 2000 r / min for 30 min to form a stable water-in-oil emulsion, dropping a certain amount of urea-formaldehyde prepolymer into the above mixed solution, adjusting the pH value of the system to 2-3 with 0.1 mol / L ammonium chloride, slowly raising the temperature in a water bath until the temperature reaches 60° C., stirring the mixture at high speed (10000 rpm) for 3 h with a high shear emulsifier to promote the formation of microcapsules, and adjusting the viscosity to a suitable value with deionized water to obtain an emulsion containing pheromone-urea-formaldehyde resin microcapsules; (3) adding the above-mentioned emulsion containing pheromone-urea-formaldehyde resin microcapsules into a mixed solution consisting of nanocellulose, styrene-butadiene latex, titanium dioxide, silane coupling agent and glyoxal in a certain proportion; (4) spraying the mixed solution onto the softwood colored coated base paper using a coating device, and rolling it up to obtain an insect attractant board substrate; (5) The coiled material is cut into pieces, the surface is coated with insect glue, holes are punched, and release paper is applied to obtain a finished insect attractant board.

7. The method for preparing the insect attractant board containing pheromone-urea-formaldehyde resin microcapsules according to claim 6, characterized in that: In the step (3), the addition ratio of the emulsion containing pheromone-urea-formaldehyde resin microcapsules is 3-10% of the mixed solution.

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