A lignin-degradable moth decoying board and a preparation method thereof

Abstract

The application discloses a lignin-degradable insect-attracting plate and a preparation method thereof. The lignin-degradable insect-attracting plate comprises a plant long-fiber base plate, a lignin waterproof barrier layer and a degradable insect sticking glue. The plant long-fiber base plate is a cardboard or a primed base paper made of at least one of needle-leaf wood plant fiber, broad-leaf wood plant fiber, bamboo pulp fiber, bast fiber and seed hair fiber. The lignin waterproof barrier layer comprises the following components in weight fraction: 80-95 parts of waterproof paint and 5-20 parts of lignin. The insect-attracting plate prepared by the application can be degraded in a natural environment and does not pollute the environment. The natural brown color of lignin can attract fly and mosquito insects, and the insect-attracting effect is outstanding. The insect-attracting plate has good strength and waterproof property, and the preparation process is simple and low in cost.

Description

Technical Field

[0001] This invention belongs to the field of agricultural and forestry pest control technology, specifically relating to a lignin-degradable insect-attracting board and its preparation method. Background Technology

[0002] Insect-attracting boards are harmless to humans, animals, and the environment. They are inexpensive, easy to use, and highly effective, and can replace chemical pesticides to a certain extent. They are particularly suitable for greenhouses, tea plantations, and other similar locations, and are already widely used in some high-tech agricultural demonstration bases, orchards, tea gardens, vegetable fields, and livestock farms. Insect-attracting boards can be used to reduce the population density of target pests by trapping large numbers of them, or to monitor population dynamics and behavioral rhythms by continuously trapping a subset of target pests.

[0003] Currently, insect-attracting boards on the market are broadly classified into three types: PP boards, PBA and PLA boards, and paper-based boards. PP boards cause serious plastic pollution and do not meet environmental protection requirements; PBA and PLA boards are expensive and the technology is not yet mature; paper-based boards are inexpensive, but they have problems such as poor water resistance and easy falling off when hung, hindering their widespread application. Existing insect-attracting adhesives also have the problem of non-biodegradability, and landfill disposal after use poses a risk of soil pollution. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention proposes a lignin-degradable insect-attracting board and its preparation method.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] In one aspect, the present invention provides a lignin-degradable insect-attracting board, the insect-attracting board comprising: a plant long fiber substrate, a lignin waterproof barrier layer, and a degradable insect-sticking adhesive;

[0007] The plant long fiber substrate is a cardboard or coated base paper made from at least one of coniferous plant fiber, broadleaf plant fiber, bamboo pulp fiber, bast fiber, and seed hair fiber.

[0008] The lignin waterproof barrier layer comprises the following components by weight: 80-95 parts waterproof coating and 5-20 parts lignin.

[0009] The present invention uses cardboard or coated base paper made from at least one of coniferous plant fiber, broadleaf plant fiber, bamboo pulp fiber, bast fiber, and seed hair fiber as a substrate, which has certain strength, tear resistance and good waterproof performance.

[0010] In some embodiments, the waterproof coating comprises the following components in parts by weight: 30-50 parts of nanocellulose, 5-15 parts of lignin, 10-20 parts of cationic starch, 5-10 parts of styrene-butadiene latex, 5-10 parts of titanium dioxide, 1-2 parts of silane coupling agent, and 2-5 parts of glyoxal.

[0011] In some embodiments, the thickness of the plant long fiber substrate is 0.3~0.4 mm.

[0012] In some embodiments, the lignin is at least one of alkali lignin, enzymatically hydrolyzed lignin powder, or liquid lignin.

[0013] In some embodiments, the waterproof coating further includes 5 to 10 parts of urea;

[0014] In some embodiments, the silane coupling agent is selected from at least one of KH550, KH560, and KH151.

[0015] In some embodiments, the degradable sticky insect adhesive includes an adhesive layer and a colloid;

[0016] The adhesive layer is insect glue, an ester polymer synthesized from polybasic acids and polyols;

[0017] The colloid is a pale yellow, viscous polymer;

[0018] The colloid is double-sided coated, with a single-sided coating thickness of 0.03mm to 0.05mm.

[0019] In some embodiments, the polyacid is selected from at least one of oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, octanoic acid, azelaic acid, and sebacic acid;

[0020] In some embodiments, the polyol is selected from at least one of 1,2-propanediol, 1,3-propanediol, 1,4-butanediol, 2,3-butanediol, 1,5-pentanediol, 1,4-pentanediol, and 1,6-hexanediol.

[0021] In another aspect, the present invention provides a method for preparing a lignin-degradable insect-attracting board, comprising the following steps:

[0022] (1) Raw material preparation: The waterproof coating and lignin are mixed according to the ratio to obtain a brown mixture, namely lignin waterproof coating;

[0023] (2) Substrate dyeing: Pour the lignin waterproof coating into the material tank of the spraying equipment, and use the spraying equipment to spray the lignin waterproof coating onto the plant long fiber substrate, and then roll it up to obtain a brown substrate.

[0024] (3) Substrate slitting: The brown substrate is slitting on a slitting machine to obtain a roll of material with a fixed width;

[0025] (4) Applying adhesive: Use an adhesive applicator to apply the degradable insect adhesive to the fixed width roll material.

[0026] In this invention, a waterproof coating is mixed with lignin, which has an adhesive effect, allowing the waterproof coating to adhere well to the plant long fiber substrate.

[0027] In step (1), the mixing temperature is 30~50℃;

[0028] In step (1), the mixing time is 1 hour;

[0029] In step (1), the mixing speed is 500 rpm.

[0030] The method for preparing the waterproof coating includes:

[0031] Nanocellulose, lignin, cationic starch, styrene-butadiene latex, titanium dioxide, silane coupling agent, and glyoxal are added to a reaction vessel according to the specified ratio and mixed evenly to obtain the waterproof coating.

[0032] The mixing speed is 1000~1500 rpm.

[0033] The preparation method of the waterproof coating also includes adding urea into a reaction vessel.

[0034] This invention adds lignin to a waterproof coating, making the coating brown in color and providing a good insect-attracting effect.

[0035] The beneficial effects of this invention are as follows:

[0036] (1) The materials and coatings used in this invention are different from those of fly traps, insect traps and Pbat / PLA degradable boards on the market. The insect traps made by this invention can also degrade in the natural environment and will not cause pollution to the environment. They are suitable for promotion and use in the field of green agriculture.

[0037] (2) This invention utilizes the natural brown color of lignin to attract flies and mosquitoes, resulting in a significant insect-attracting effect;

[0038] (3) Unlike traditional paper-based materials, the waterproof coating of the insect-attracting board of the present invention uses nanocellulose and lignin as raw materials, which has good waterproof properties and can be hung in windy and rainy environments.

[0039] (4) The process of this invention is simple, the equipment requirements are not high, the cost is low, and it is easy to promote. Detailed Implementation

[0040] The present invention is further illustrated below by way of examples, but these examples do not limit the invention to the scope of the embodiments described. Experimental methods in the following examples, unless otherwise specified, were performed according to conventional methods and conditions, or as selected in the product instructions. Furthermore, all reagents and raw materials used in this invention are commercially available.

[0041] Example 1

[0042] The lignin-degradable insect-attracting board has a plant long fiber substrate made of coniferous plant fiber paper with a thickness of 0.3 mm; lignin is alkali lignin; and the adhesive layer is insect-sticking glue, which is a polyester polymer formed by esterification and condensation polymerization of adipic acid and 1,2-propanediol.

[0043] The preparation method includes the following steps:

[0044] (1) Raw material preparation: 30 parts of nanocellulose, 5 parts of urea, 5 parts of lignin, 20 parts of cationic starch, 5 parts of styrene-butadiene latex, 7 parts of titanium dioxide, 1 part of silane coupling agent KH560, 5 parts of glyoxal, and 5 parts of deionized water were added to the reactor according to the mass ratio and mixed evenly at 1200 rpm. The viscosity requirement was 11S (based on Foremost cup 4). The above mixture was then mixed with 10 parts of lignin at 30℃ and 500 rpm for 1 hour to obtain a colored mixture.

[0045] (2) Substrate dyeing: Pour the mixture into the material tank of the spraying equipment, and use the spraying equipment to spray the lignin waterproof coating onto the coniferous plant fiber base paper, and then roll it up to obtain the insect-attracting board substrate.

[0046] (3) Substrate slitting: The roll material is slitting on a slitting machine to obtain a roll material with a width of 20cm.

[0047] (4) Applying adhesive: Use an adhesive applicator to apply the degradable sticky insect adhesive to the sticky insect board. The thickness of the adhesive layer is 0.03~0.05mm.

[0048] (5) Punching holes: Punch four holes in the sticky insect board coated with sticky insect glue, with a hole diameter of 5 cm.

[0049] (6) Add wooden air clips: Add 4 wooden air clips in the hanging holes, but do not add them inside the shed.

[0050] Example 2

[0051] The lignin-degradable insect-attracting board has a plant long fiber substrate made of bamboo pulp fiber base paper with a thickness of 0.3 mm; the lignin is enzymatically hydrolyzed lignin; and the adhesive layer is insect-sticking glue, a polyester polymer synthesized from succinic acid and 1,4-butanediol.

[0052] The preparation method includes the following steps:

[0053] (1) Raw material preparation: 40 parts of nanocellulose, 10 parts of urea, 6 parts of lignin, 15 parts of cationic starch, 5 parts of styrene-butadiene latex, 7 parts of titanium dioxide, 2 parts of silane coupling agent KH550, 2 parts of glyoxal, and 5 parts of deionized water were added to the reactor according to the mass ratio and mixed evenly at 1200 rpm. The viscosity requirement was 11S (based on Foremost cup 4). The above mixture was then mixed with 8 parts of lignin at 30℃ and 500 rpm for 1 hour to obtain a colored mixture.

[0054] (2) Substrate dyeing: Pour the mixture into the material tank of the spraying equipment, and use the spraying equipment to spray the lignin waterproof coating onto the plant long fiber substrate, and roll it up to obtain the insect-attracting board substrate.

[0055] (3) Substrate slitting: The roll material is slitting on a slitting machine to obtain a roll material with a width of 20cm.

[0056] (4) Applying adhesive: Use an adhesive applicator to apply the degradable sticky insect adhesive to the sticky insect board. The thickness of the adhesive layer is 0.03~0.05mm.

[0057] (5) Punching holes: Punch four holes in the sticky insect board coated with sticky insect glue, with a hole diameter of 5 cm.

[0058] (6) Add wooden air clips: Add 4 wooden air clips in the hanging holes, but do not add them inside the shed.

[0059] Example 3

[0060] The lignin-degradable insect-attracting board uses plant long fiber substrate made of coniferous plant fiber paper with a thickness of 0.4 mm; lignin is alkali lignin; and the adhesive layer is insect-sticking glue, a polyester polymer formed by esterification and condensation polymerization of adipic acid and 1,2-propanediol.

[0061] The preparation method includes the following steps:

[0062] (1) Raw material preparation: 30 parts of nanocellulose, 7 parts of urea, 15 parts of lignin, 20 parts of cationic starch, 7 parts of styrene-butadiene latex, 5 parts of titanium dioxide, 1.5 parts of silane coupling agent KH560, 3 parts of glyoxal, and 5 parts of deionized water were added to the reactor according to the mass ratio and mixed evenly at 1000 rpm. The viscosity requirement was 11S (based on Foremost cup 4). The above mixture was then mixed with 20 parts of lignin at 40℃ and 500 rpm for 1 hour to obtain a colored mixture.

[0063] (2) Substrate dyeing: Pour the mixture into the material tank of the spraying equipment, and use the spraying equipment to spray the lignin waterproof coating onto the coniferous plant fiber base paper, and then roll it up to obtain the insect-attracting board substrate.

[0064] (3) Substrate slitting: The roll material is slitting on a slitting machine to obtain a roll material with a width of 20cm.

[0065] (4) Applying adhesive: Use an adhesive applicator to apply the degradable sticky insect adhesive to the sticky insect board. The thickness of the adhesive layer is 0.03~0.05mm.

[0066] (5) Punching holes: Punch four holes in the sticky insect board coated with sticky insect glue, with a hole diameter of 5 cm.

[0067] (6) Add wooden air clips: Add 4 wooden air clips in the hanging holes, but do not add them inside the shed.

[0068] Example 4

[0069] The lignin-degradable insect-attracting board has a plant long fiber substrate made of coniferous plant fiber paper with a thickness of 0.3 mm; lignin is alkali lignin; and the adhesive layer is insect-sticking glue, which is a polyester polymer formed by esterification and condensation polymerization of adipic acid and 1,2-propanediol.

[0070] The preparation method includes the following steps:

[0071] (1) Raw material preparation: 30 parts of nanocellulose, 5 parts of urea, 5 parts of lignin, 20 parts of cationic starch, 10 parts of styrene-butadiene latex, 10 parts of titanium dioxide, 1 part of silane coupling agent KH560, 5 parts of glyoxal, and 5 parts of deionized water were added to the reactor according to the mass ratio and mixed evenly at 1500 rpm. The viscosity requirement was 11S (based on Foremost cup 4). The above mixture was then mixed with 10 parts of lignin at 50℃ and 500 rpm for 1 hour to obtain a colored mixture.

[0072] (2) Substrate dyeing: Pour the mixture into the material tank of the spraying equipment, and use the spraying equipment to spray the lignin waterproof coating onto the coniferous plant fiber base paper, and then roll it up to obtain the insect-attracting board substrate.

[0073] (3) Substrate slitting: The roll material is slitting on a slitting machine to obtain a roll material with a width of 20cm.

[0074] (4) Applying adhesive: Use an adhesive applicator to apply the degradable sticky insect adhesive to the sticky insect board. The thickness of the adhesive layer is 0.03~0.05mm.

[0075] (5) Punching holes: Punch four holes in the sticky insect board coated with sticky insect glue, with a hole diameter of 5 cm.

[0076] (6) Add wooden air clips: Add 4 wooden air clips in the hanging holes, but do not add them inside the shed.

[0077] Comparative Example 1

[0078] The product is a commercially available PP yellow board, manufactured by Shandong Haobang Agricultural Technology Co., Ltd., with dimensions of 20cm×25mm×0.3mm.

[0079] Comparative Example 2

[0080] The product is a commercially available PP blue board with dimensions of 20cm×25mm×0.3mm, manufactured by Shandong Haobang Agricultural Technology Co., Ltd.

[0081] Comparative Example 3

[0082] The only difference from Example 1 is that the addition of lignin in the raw materials is replaced with the corresponding brown water-based pigment, and urea is no longer added.

[0083] Comparative Example 4

[0084] The product is a commercially available paper-based yellow board produced by Shandong Haobang Agricultural Technology Co., Ltd., with dimensions of 20cm×25mm×0.3mm.

[0085] Comparative Example 5

[0086] The only difference from Example 5 is that the amount of nanocellulose added to the raw materials is 10 parts, and lignin is no longer added.

[0087] Effect Example

[0088] Application performance tests were conducted on the products of the embodiments and comparative examples of this application. The test standards or methods are as follows:

[0089] I. Degradation Experiments: Degradation experiments were conducted both outdoors and in a breeding farm. Nine treatments were prepared by burying the sticky insect boards in the soil, numbered 1#, 2#, 3#, 4#, 5#, 6#, 7#, 8#, and 9#, with each treatment spaced 30 cm apart. Each treatment was labeled and marked. One sample was excavated each month for treatment, and the degree of degradation of the fully degradable sticky insect boards was observed and recorded. Photos were taken to observe the degradation progress, and the results were marked. Thereafter, observations were conducted every 30 days, using the same method to record the degree of degradation of the fully degradable sticky insect boards.

[0090] II. Insect trapping experiment: Insect trapping experiments were conducted outdoors and in a breeding farm. Twenty insect trapping boards were hung at each test site, with the bottom of the board about 10cm away from the top of the plant. The insect trapping boards were replaced weekly. The number of flies and mosquitoes trapped on each board was investigated and recorded weekly for 9 consecutive weeks.

[0091] III. Water resistance test, using the Cobb method:

[0092] Test Method: A metal ring or cylinder with both ends open is clamped onto a predetermined area and weight of paper, effectively closing one end of the ring or cylinder. A measured amount of water (usually 100ml) is poured into the water-absorbing area. After a specified time, the remaining water is poured off, and the paper sample is reweighed. The water absorption rate is calculated by determining the weight difference before and after the reweighing. The generally specified test time is about one minute; if the paper is particularly hygroscopic, the time needs to be adjusted. The lower the water absorption rate, the better the paper's waterproof performance.

[0093] Application performance tests were conducted on the products of Examples 1-4 and Comparative Examples 1-5 of this application, and the test results are shown in Tables 1-9.

[0094] Table 1

[0095]

[0096] Table 2

[0097]

[0098] Table 3

[0099]

[0100] Table 4

[0101]

[0102] Table 5

[0103]

[0104] Table 6

[0105]

[0106] Table 7

[0107]

[0108] Table 8

[0109]

[0110] Table 9

[0111]

[0112] The results of the insect-attracting experiment show that the insect-attracting board of the present invention has a more outstanding insect-attracting effect compared with the traditional plastic board, and has a very good effect on attracting and killing flies and mosquitoes.

[0113] Degradation experiments show that, compared with traditional plastic boards, the insect-attracting board of this invention can degrade quickly, achieving the goals of being non-recyclable, low-cost, and environmentally friendly.

[0114] Waterproof test results show that the insect-attracting board of the present invention has higher waterproof performance than the commercially available insect-attracting board of the comparative example, and meets the requirements for outdoor use.

[0115] Finally, it should be noted that in this invention, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0116] Although this disclosure has been described above through specific embodiments, it should be understood that those skilled in the art can devise various modifications, improvements, or equivalents to this disclosure within the spirit and scope of the appended solutions. Such modifications, improvements, or equivalents should also be considered to be included within the scope of protection claimed in this disclosure.

Claims

1. A lignin-degradable insect-attracting board, characterized in that, The insect-attracting board comprises: a plant long fiber substrate, a lignin waterproof barrier layer, and a biodegradable insect-adhesive adhesive. The plant long fiber substrate is a cardboard or coated base paper made from at least one of coniferous plant fiber, broadleaf plant fiber, bamboo pulp fiber, bast fiber, and seed hair fiber. The lignin waterproof barrier layer comprises the following components by weight fraction: 80-95 parts waterproof coating and 5-20 parts lignin; The waterproof coating comprises the following components in parts by weight: 30-50 parts nanocellulose, 5-10 parts urea, 5-15 parts lignin, 10-20 parts cationic starch, 5-10 parts styrene-butadiene latex, 5-10 parts titanium dioxide, 1-2 parts silane coupling agent, 2-5 parts glyoxal, and 5 parts deionized water.

2. The lignin-degradable insect-attracting board according to claim 1, characterized in that, The thickness of the plant long fiber substrate is 0.3~0.4mm.

3. The lignin-degradable insect-attracting board according to claim 2, characterized in that, The lignin is at least one of alkali lignin, enzymatically hydrolyzed lignin powder, or liquid lignin. And / or, the silane coupling agent is selected from at least one of γ-aminopropyltriethoxysilane KH550, γ-glycidoxypropyltrimethoxysilane KH560, and vinyltriethoxysilane KH151.

4. The lignin-degradable insect-attracting board according to claim 1, characterized in that, The degradable sticky insect adhesive includes an adhesive layer and a colloid; The adhesive layer is insect glue, an ester polymer synthesized from polybasic acids and polyols; The colloid is a pale yellow, viscous polymer; The colloid is double-sided coated, with a single-sided coating thickness of 0.03mm to 0.05mm.

5. The lignin-degradable insect-attracting board according to claim 4, characterized in that, The polyacid is selected from at least one of oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, octanoic acid, azelaic acid, and sebacic acid; The polyol is selected from at least one of 1,2-propanediol, 1,3-propanediol, 1,4-butanediol, 2,3-butanediol, 1,5-pentanediol, 1,4-pentanediol, and 1,6-hexanediol.

6. The method for preparing the lignin-degradable insect-attracting board according to any one of claims 1 to 5, characterized in that, Includes the following steps: (1) Raw material preparation: The waterproof coating and lignin are mixed according to the ratio to obtain a brown mixture, namely lignin waterproof coating; (2) Substrate dyeing: Pour the lignin waterproof coating into the material tank of the spraying equipment, and use the spraying equipment to spray the lignin waterproof coating onto the plant long fiber substrate, and then roll it up to obtain a brown substrate. (3) Substrate slitting: The brown substrate is slitting on a slitting machine to obtain a roll of material with a fixed width; (4) Applying adhesive: Use an adhesive applicator to apply the degradable insect adhesive to the fixed width roll material.

7. The method for preparing the lignin-degradable insect-attracting board according to claim 6, characterized in that, In step (1), the mixing temperature is 30~50℃; And / or, in step (1), the mixing time is 1 hour; And / or, in step (1), the mixing speed is 500 rpm.

8. The method for preparing the lignin-degradable insect-attracting board according to claim 6, characterized in that, The method for preparing the waterproof coating includes: Nanocellulose, urea, lignin, cationic starch, styrene-butadiene latex, titanium dioxide, silane coupling agent, glyoxal, and deionized water are added to a reaction vessel according to the specified ratio and mixed evenly to obtain the waterproof coating.

9. The method for preparing the lignin-degradable insect-attracting board according to claim 8, characterized in that, The mixing speed is 1000~1500 rpm.

10. The method for preparing the lignin-degradable insect-attracting board according to claim 7, characterized in that, The preparation method of the waterproof coating also includes adding urea into a reaction vessel.

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