Lignin degradable insect trapping board and preparation method thereof

Abstract

The invention discloses a lignin degradable insect trapping plate and a preparation method thereof. The lignin degradable insect trapping plate comprises a plant long fiber substrate, a lignin waterproof barrier layer and degradable insect sticking glue, the plant long fiber base plate is paperboard or lamination base paper made of at least one of coniferous wood plant fibers, broadleaf wood plant fibers, bamboo pulp fibers, bast fibers and seed wool fibers; the lignin waterproof barrier layer comprises the following components in parts by weight: 80-95 parts of waterproof paint and 5-20 parts of lignin. The insect trapping board prepared by the invention can be degraded in the natural environment, does not cause pollution to the environment, utilizes natural brown of lignin to trap flies and mosquitoes, has an outstanding insect trapping effect, has relatively good strength and waterproofness, and is simple in preparation process and low in cost.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural and forestry pest control, and particularly relates to a lignin degradable insect attractant board and a preparation method thereof. Background Art

[0002] Insect traps are harmless to humans, animals and the environment, and are low-cost, easy to operate, and effective. They can replace chemical pesticides to a certain extent, and are especially suitable for greenhouses, tea fields, and other places. They have been widely used in some agricultural high-tech demonstration bases, orchards, tea gardens, vegetable fields, and livestock farms. Insect traps can be used to kill a large number of target pest individuals to reduce their population density, or to monitor their population dynamics and behavioral rhythms by continuously trapping some of the target pest individuals.

[0003] The materials of insect traps on the market are generally divided into three categories: PP board, PBAT and PLA board, and paper-based board. The use of PP board will cause serious plastic pollution and does not meet environmental protection requirements; PBAT and PLA boards are expensive and the technology is immature; paper-based board itself is cheap, but it has problems such as weak waterproofness and easy to fall when hanging, which hinders its large-scale application. The existing insect trap glue also has the problem of non-degradability, and landfill disposal after use will also have the risk of polluting the land. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a lignin degradable insect attractant board and a preparation method thereof.

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

[0006] In one aspect, the present invention provides a lignin degradable insect attractant, the insect attractant comprising: a plant long fiber substrate, a lignin waterproof barrier layer and degradable insect glue;

[0007] The plant long fiber substrate is cardboard or coated base paper made of at least one of softwood plant fiber, hardwood plant fiber, bamboo pulp fiber, bast fiber, and seed hair fiber;

[0008] The lignin waterproof barrier layer comprises the following components in weight fractions: 80 to 95 parts of waterproof coating and 5 to 20 parts of lignin.

[0009] The present invention adopts cardboard or coated base paper made of at least one of coniferous wood plant fiber, broadleaf wood plant fiber, bamboo pulp fiber, bast fiber and seed hair fiber as the base plate, 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 to 50 parts of nanocellulose, 5 to 15 parts of lignin, 10 to 20 parts of cationic starch, 5 to 10 parts of styrene-butadiene latex, 5 to 10 parts of titanium dioxide, 1 to 2 parts of silane coupling agent, and 2 to 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 comprises 5 to 10 parts of urea;

[0014] In some embodiments, the silane coupling agent is selected from at least one of KH550, KH560, KH151, and KH191.

[0015] In some embodiments, the degraded insect glue comprises a glue layer and a colloid;

[0016] The glue layer is sticky glue, an ester polymer synthesized from polyacids and polyols;

[0017] The colloid is a light yellow viscous polymer;

[0018] The colloid is double-sided adhesive, and the thickness of the single-sided adhesive is 0.03mm-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, suberic acid, azelaic acid, and sebacic acid;

[0020] In some embodiments, the polyol is selected from at least one of 1,2-propylene glycol, 1,3-propylene glycol, 1,4-butylene glycol, 2,3-butylene glycol, 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 attractant, comprising the following steps:

[0022] (1) Raw material preparation: the waterproof coating and lignin are mixed according to a ratio to obtain a brown mixed liquid, i.e., the lignin waterproof coating;

[0023] (2) substrate dyeing: pouring the lignin waterproof coating into a material tank of a spraying device, spraying the lignin waterproof coating onto a plant long fiber substrate using the spraying device, and rolling up to obtain a brown substrate;

[0024] (3) substrate slitting: slitting the brown substrate on a slitting machine to obtain a coil of fixed width;

[0025] (4) Gluing: smearing the degraded insect glue on the fixed width coil by using a glue coating machine.

[0026] In the present invention, the waterproof coating is mixed with lignin, and the lignin has an adhesive effect, so that the waterproof coating can be well attached to the plant long fiber substrate.

[0027] In step (1), the mixing temperature is 30 to 50° C.;

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

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

[0030] The preparation method of the waterproof coating comprises:

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

[0032] The mixing rotation speed is 1000-1500 rpm.

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

[0034] The present invention adds lignin into the waterproof coating, so that the color of the coating is brown and has a good insect attracting effect.

[0035] The beneficial effects of the present invention are:

[0036] (1) The materials and coatings used in the present invention are different from fly traps, insect traps and PBAT / PLA degradable boards on the market. The insect traps prepared can also be degraded in the natural environment, will not cause pollution to the environment, and are suitable for promotion and use in the field of green agriculture;

[0037] (2) The present invention utilizes the natural brown color of lignin to attract flies and mosquitoes, and has an outstanding insect attracting effect;

[0038] (3) Different from traditional paper-based materials, the waterproof coating of the insect trap board of the present invention is made of nanocellulose and lignin, has good waterproof properties, and can be hung in windy and rainy environments;

[0039] (4) The process of the present invention is simple, has low requirements on equipment, is low in cost, and is easy to promote. DETAILED DESCRIPTION

[0040] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples. The experimental methods in the following examples without specifying specific conditions are selected according to conventional methods and conditions, or according to the product specifications. In addition, the reagents and raw materials used in the present invention are all commercially available.

[0041] Example 1

[0042] The lignin-degradable insect-attracting board has a plant long-fiber substrate made of coniferous wood fiber paper with a thickness of 0.3 mm; the lignin is alkali lignin; and the glue layer is insect glue, a polyester polymer synthesized by esterification and condensation of adipic acid and 1.2-propylene glycol.

[0043] The preparation method comprises 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 are added to a reactor according to the mass ratio, mixed at a speed of 1200 rpm, and the viscosity is required to be 11S (based on four cups of coating); the above mixed solution is mixed with 10 parts of lignin, the temperature is 30°C, the rotation speed is 500 rpm, and mixed for 1 hour to obtain a colored mixed solution.

[0045] (2) Base plate dyeing: Pour the mixed liquid into the material tank of the spraying equipment, use the spraying equipment to spray the lignin waterproof coating onto the coniferous plant fiber base paper, and roll it up to obtain the insect attractant base material.

[0046] (3) Slitting of substrate: The coil is slitting on a slitting machine to obtain a coil with a width of 20 cm.

[0047] (4) Gluing: Use a glue coating machine to apply the degraded insect sticky glue on the insect sticky board, and the glue layer thickness is 0.03-0.05 mm.

[0048] (5) Punching: Punch holes on the insect trap board coated with insect trap glue, with 4 holes punched and a hole diameter of 5 cm;

[0049] (6) Add wooden air buckles: Add 4 wooden air buckles to 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 paper with a thickness of 0.3 mm; the lignin is enzymatically hydrolyzed lignin; and the glue layer is insect glue, a polyester polymer synthesized from succinic acid and 1.4-butanediol.

[0052] The preparation method comprises 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 are added to a reactor according to the mass ratio, mixed at a speed of 1200 rpm, and the viscosity is required to be 11S (based on four cups of coating); the above mixed solution is mixed with 8 parts of lignin, the temperature is 30°C, the speed is 500 rpm, and mixed for 1 hour to obtain a colored mixed solution.

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

[0055] (3) Slitting of substrate: The coil is slitting on a slitting machine to obtain a coil with a width of 20 cm.

[0056] (4) Gluing: Use a glue coating machine to apply the degraded insect sticky glue on the insect sticky board, and the glue layer thickness is 0.03-0.05 mm.

[0057] (5) Punching: Punch holes on the insect trap board coated with insect trap glue, with 4 holes punched and a hole diameter of 5 cm;

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

[0059] Example 3

[0060] The lignin-degradable insect-attracting board has a plant long-fiber base material made of broad-leaved plant fiber paper with a thickness of 0.32 mm; the lignin is liquid lignin; and the glue layer is insect glue, a polyester polymer synthesized from terephthalic acid and 1.3-propylene glycol.

[0061] The preparation method comprises the following steps:

[0062] (1) Raw material preparation: 50 parts of nanocellulose, 10 parts of cationic starch, 10 parts of lignin, 5 parts of styrene-butadiene latex, 7 parts of titanium dioxide, 5 parts of urea, 11 parts of silane coupling agent KH-19, 2 parts of glyoxal, and 5 parts of deionized water are added to a reactor according to the mass ratio, mixed evenly at a speed of 1200 rpm, and the viscosity is required to be 11S (based on four cups of coating); the above mixed solution is mixed with 5 parts of lignin, the temperature is 30°C, the speed is 500 rpm, and mixed for 1 hour to obtain a colored mixed solution.

[0063] (2) Base plate dyeing: Pour the mixed liquid into the material tank of the spraying equipment, use the spraying equipment to spray the waterproof coating onto the hardwood plant fiber base paper, and roll it up to obtain the insect attractant base material.

[0064] (3) Slitting of substrate: The coil is slitting on a slitting machine to obtain a coil with a width of 20 cm.

[0065] (4) Gluing: Use a glue coating machine to apply the degraded insect sticky glue on the insect sticky board, and the glue layer thickness is 0.03-0.05 mm.

[0066] (5) Punching: Punch holes on the insect trap board coated with insect trap glue, with 4 holes punched and a hole diameter of 5 cm;

[0067] (6) Add wooden air buckles: Add 4 wooden air buckles to 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 base material made of coniferous wood fiber paper with a thickness of 0.4 mm; the lignin is alkali lignin; and the glue layer is insect glue, a polyester polymer synthesized by esterification and condensation of adipic acid and 1.2-propylene glycol.

[0070] The preparation method comprises the following steps:

[0071] (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 are added to a reactor according to the mass ratio, mixed at a speed of 1000 rpm, and the viscosity is required to be 11S (based on four cups of coating); the above mixed solution is mixed with 20 parts of lignin, the temperature is 40°C, the rotation speed is 500 rpm, and the mixing is carried out for 1 hour to obtain a colored mixed solution.

[0072] (2) Base plate dyeing: Pour the mixed liquid into the material tank of the spraying equipment, use the spraying equipment to spray the lignin waterproof coating onto the coniferous plant fiber base paper, and roll it up to obtain the insect attractant base material.

[0073] (3) Slitting of substrate: The coil is slitting on a slitting machine to obtain a coil with a width of 20 cm.

[0074] (4) Gluing: Use a glue coating machine to apply the degraded insect sticky glue on the insect sticky board, and the glue layer thickness is 0.03-0.05 mm.

[0075] (5) Punching: Punch holes on the insect trap board coated with insect trap glue, with 4 holes punched and a hole diameter of 5 cm;

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

[0077] Example 5

[0078] The lignin-degradable insect-attracting board has a plant long-fiber substrate made of coniferous wood fiber paper with a thickness of 0.3 mm; the lignin is alkali lignin; and the glue layer is insect glue, a polyester polymer synthesized by esterification and condensation of adipic acid and 1.2-propylene glycol.

[0079] The preparation method comprises the following steps:

[0080] (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 into a reactor according to the mass ratio, mixed at a speed of 1500 rpm, and the viscosity was required to be 11S (based on four cups of coating); the above mixed solution was mixed with 10 parts of lignin, the temperature was 50° C., the rotation speed was 500 rpm, and the mixing was carried out for 1 hour to obtain a colored mixed solution.

[0081] (2) Base plate dyeing: Pour the mixed liquid into the material tank of the spraying equipment, use the spraying equipment to spray the lignin waterproof coating onto the coniferous plant fiber base paper, and roll it up to obtain the insect attractant base material.

[0082] (3) Slitting of substrate: The coil is slitting on a slitting machine to obtain a coil with a width of 20 cm.

[0083] (4) Gluing: Use a glue coating machine to apply the degraded insect sticky glue on the insect sticky board, and the glue layer thickness is 0.03-0.05 mm.

[0084] (5) Punching: Punch holes on the insect trap board coated with insect trap glue, with 4 holes punched and a hole diameter of 5 cm;

[0085] (6) Add wooden air buckles: Add 4 wooden air buckles to the hanging holes, but do not add them inside the shed.

[0086] Comparative Example 1

[0087] Commercially available product, PP yellow board with dimensions of 20cm×25mm×0.3mm produced by Shandong Haobang Agricultural Technology Co., Ltd.

[0088] Comparative Example 2

[0089] Commercially available product, PP blue board with dimensions of 20cm×25mm×0.3mm produced by Shandong Haobang Agricultural Technology Co., Ltd.

[0090] Comparative Example 3

[0091] The only difference from Example 1 is that the two additions of lignin in the raw material are replaced by the corresponding brown aqueous color paste, and urea is no longer added.

[0092] Comparative Example 4

[0093] Commercially available product, paper-based yellow board with a size of 20cm×25mm×0.3mm produced by Shandong Haobang Agricultural Technology Co., Ltd.

[0094] Comparative Example 5

[0095] The only difference from Example 5 is that the amount of nanocellulose added to the raw material is 10 parts, and no lignin is added.

[0096] Effect Example

[0097] The products of the embodiments and comparative examples of the present application were tested for application performance, and the test standards or methods were as follows:

[0098] 1. Degradation experiment: Degradation experiments were conducted outdoors and in farms. Nine treatments were set up for the buried soil, numbered 1#, 2#, 3#, 4#, 5#, 6#, 7#, 8# and 9#, with a spacing of 30 cm between each treatment. Labels were set up and marked. One sample was dug up every month for treatment, and the degree of degradation of the fully degradable sticky insect board was observed and recorded. Photos were taken to observe the degree of degradation and marked. Observe once every 30 days in the future, using the same method as above to record the degree of degradation of the fully degradable sticky insect board.

[0099] 2. Insect attraction experiment: Insect attraction experiment was carried out outdoors and in the farm respectively. 20 insect attraction boards were hung in each test site, with the bottom about 10 cm away from the top of the plant. The insect attraction boards were replaced every week, and the number of flies and mosquitoes caught on each color board was investigated once a week and recorded. The investigation continued for 9 weeks.

[0100] 3. Waterproof test, using the Cobb method:

[0101] Test method: Use a metal ring or cylinder with both ends open to clamp a paper of a given area and weight, so that the paper effectively closes one end of the metal ring or cylinder. Pour a certain amount of water (usually 100ml) into the water storage area, pour out the remaining water after the specified time, re-weigh the paper sample, and calculate the water absorption rate by calculating the weight difference before and after. The test time is generally specified to be about one minute. If the paper is particularly hygroscopic, the time needs to be adjusted. The lower the water absorption rate, the better the waterproof performance of the paper.

[0102] The products of Examples 1 to 5 of the present application and Comparative Examples 1 to 5 were subjected to application performance tests, and the test results are shown in Tables 1 to 10.

[0103] Table 1

[0104]

[0105] Table 2

[0106]

[0107] Table 3

[0108]

[0109] Table 4

[0110]

[0111] Table 5

[0112]

[0113]

[0114] Table 6

[0115]

[0116] Table 7

[0117]

[0118]

[0119] Table 8

[0120]

[0121] Table 9

[0122]

[0123]

[0124] Table 10

[0125] Serial number <![CDATA[Cobb value (g / m 2 )]]> Example 1 11 Example 2 10 Example 3 9 Example 4 11 Example 5 12 Comparative Example 3 17 Comparative Example 4 26 Example 5 22

[0126] The insect luring experiment results show that compared with the traditional plastic board, the insect luring board of the present invention has outstanding insect luring effect and has a good luring and killing effect on flies and mosquitoes.

[0127] The degradation test results show that compared with the traditional plastic board, the insect attracting board of the present invention can be degraded quickly, achieving the goals of no recycling, low cost, and green environmental protection.

[0128] The waterproof test results show that the insect attractant board of the present invention is more waterproof than the commercially available insect attractant board of the comparative example and is suitable for outdoor use.

[0129] Finally, it should be noted that in the present invention, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0130] Although the present disclosure has been disclosed above through the description of the specific embodiments of the present disclosure, it should be understood that those skilled in the art can design various modifications, improvements or equivalents to the present disclosure within the spirit and scope of the attached scheme. These modifications, improvements or equivalents should also be considered to be included in the scope of protection claimed by the present disclosure.

Claims

1. A lignin degradable insect trap, characterized in that: The insect attracting board comprises: a plant long fiber substrate, a lignin waterproof barrier layer and degradable insect glue; The plant long fiber substrate is cardboard or coated base paper made of at least one of softwood plant fiber, hardwood plant fiber, bamboo pulp fiber, bast fiber, and seed hair fiber; The lignin waterproof barrier layer comprises the following components in weight fractions: 80 to 95 parts of waterproof coating and 5 to 20 parts of lignin.

2. The lignin degradable insect attractant according to claim 1, characterized in that: 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; And / or, the thickness of the plant long fiber substrate is 0.3-0.4 mm.

3. The lignin degradable insect attractant according to claim 2, characterized in that: The lignin is at least one of alkali lignin, enzymatic lignin powder or liquid lignin; And / or, the waterproof coating further comprises 5 to 10 parts of urea; And / or, the silane coupling agent is selected from at least one of KH550, KH560, KH151, and KH191.

4. The lignin degradable insect attractant according to claim 1, characterized in that: The degradable insect glue comprises a glue layer and a colloid; The glue layer is sticky glue, an ester polymer synthesized from polyacids and polyols; The colloid is a light yellow viscous polymer; The colloid is double-sided adhesive, and the thickness of the single-sided adhesive is 0.03mm-0.05mm.

5. The lignin degradable insect attractant 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, suberic acid, azelaic acid, and sebacic acid; The polyol is selected from at least one of 1,2-propylene glycol, 1,3-propylene glycol, 1,4-butylene glycol, 2,3-butylene glycol, 1,5-pentanediol, 1,4-pentanediol, and 1,6-hexanediol.

6. The method for preparing the lignin degradable insect attractant according to any one of claims 1 to 5, characterized in that: The steps include: (1) Raw material preparation: the waterproof coating and lignin are mixed according to a ratio to obtain a brown mixed liquid, i.e., the lignin waterproof coating; (2) substrate dyeing: pouring the lignin waterproof coating into a material tank of a spraying device, spraying the lignin waterproof coating onto a plant long fiber substrate using the spraying device, and rolling up to obtain a brown substrate; (3) substrate slitting: slitting the brown substrate on a slitting machine to obtain a coil of fixed width; (4) Gluing: smearing the degraded insect glue on the fixed width coil by using a glue coating machine.

7. The method for preparing the lignin degradable insect attractant according to claim 6, characterized in that: In step (1), the mixing temperature is 30 to 50° C.; And / or, in step (1), the mixing time is 1 h; And / or, in step (1), the mixing rotation speed is 500 rpm.

8. The method for preparing the lignin degradable insect attractant according to claim 6, characterized in that: The preparation method of the waterproof coating comprises: Nanocellulose, lignin, cationic starch, styrene-butadiene latex, titanium dioxide, silane coupling agent and glyoxal are added into a reaction kettle according to a proportion and mixed evenly to obtain the waterproof coating.

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

10. The method for preparing the lignin degradable insect attractant according to claim 7, characterized in that: The preparation method of the waterproof coating also includes adding urea into the reaction kettle.

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