Load type tree whitening agent and preparation method thereof

Abstract

The invention belongs to the technical field of whitewashing agents, and particularly relates to a load type tree whitewashing agent and a preparation method thereof.The preparation method comprises the steps that xanthan gum and an adhesive are added into water, and a thickening solution is obtained; the preparation method comprises the following steps: adding humic acid, bentonite, sulfur powder, nano calcium carbonate, isopentenyl adenosine and a plant source synergist into water, carrying out ultrasonic dispersion, standing for adsorption, dehydrating and drying to obtain a bentonite-loaded composite material; quick lime is added into water for curing, and a base material is obtained; and adding the thickening liquid, the bentonite-loaded composite material, hydroxypropyl methyl cellulose and sodium polyacrylate into the base material to obtain the loaded tree whitening agent. The scheme has the following advantages: firstly, bentonite is used as a carrier, and a plurality of active components are loaded, so that the stability and persistence of the active components are improved, and the adhesive force of the tree whitewashing liquid is enhanced; and secondly, the added plant-source synergist has a natural repelling effect on animals, so that the risk that trees are gnawed can be remarkably reduced, and diseases and insect pests can be prevented and controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of tree whitewashing agents, and particularly to a supported tree whitewashing agent and a preparation method thereof. Background Art

[0002] Tree whitewashing liquid is a protective coating specifically used for smearing on the main trunk of trees. It is usually white or light-colored and is widely used in fields such as urban greening, forestry protection, and orchard management. It is particularly suitable for newly planted trees, ancient and famous trees, and trees vulnerable to frost damage and pest attacks.

[0003] Traditional tree whitewashing agents mainly consist of quicklime, sulfur powder, vegetable oil, and table salt. They achieve the functions of preventing sunburn and frost damage through the reflection of the white coating, and at the same time rely on the bactericidal properties of sulfur to inhibit pathogenic bacteria. However, the existing tree whitewashing agents have poor adhesion, and the film formed is easily washed away by rain, requiring frequent re-application, which increases labor costs. In addition, the existing tree whitewashing agents lack effective protection against wild animals or livestock. Gnawing will cause the trees to lose the protective layer, making them vulnerable to other diseases or pest attacks, affecting the growth and development of the trees. Summary of the Invention

[0004] To solve the problems existing in the prior art, on the one hand, the present invention provides a supported tree whitewashing agent, aiming to solve the problems of insufficient adhesion and short protection period existing in traditional whitewashing agents, and enhance the effects of preventing diseases and pests and preventing animals from gnawing. The specific solutions are as follows: A supported tree whitewashing agent contains the following raw materials in parts by mass: 40 - 55 parts of water, 18 - 25 parts of quicklime, 15 - 20 parts of bentonite, 3 - 4 parts of humic acid, 2.5 - 3.5 parts of sulfur powder, 2 - 4 parts of hydroxypropyl methylcellulose, 2 - 3 parts of nano calcium carbonate, 1 - 3 parts of isopentenyl adenosine, 4 - 6 parts of plant-derived synergist, 2 - 3 parts of sodium polyacrylate, 1 - 1.5 parts of adhesive, and 0.5 - 1 part of xanthan gum.

[0005] Preferably, the plant-derived synergist is compounded from matrine, peppermint oil, and capsaicin according to a mass ratio of 3:1.5:1.

[0006] Preferably, the supported tree whitewashing agent further includes 3 - 5 parts of a reflective material.

[0007] Preferably, the reflective material is compounded from mica powder and titanium dioxide according to a mass ratio of 1:2.

[0008] Preferably, the adhesive is compounded from sodium carboxymethyl cellulose and polyvinyl alcohol according to a mass ratio of 2:1.

[0009] On the other hand, the present invention also provides a preparation method of a supported tree whitewashing agent, including the following steps: 1) Take 5 - 10 parts of water, add 0.5 - 1 part of xanthan gum and 1 - 1.5 parts of adhesive, and stir until completely dissolved to obtain a thickening liquid; 2) According to the solid - liquid ratio of 1∶3, add 3 - 4 parts of humic acid and 15 - 20 parts of pretreated bentonite to water, stir and mix, add 2.5 - 3.5 parts of sulfur powder, 2 - 3 parts of nano - calcium carbonate, 1 - 3 parts of isopentenyl adenosine, and 4 - 6 parts of plant - derived synergist. After ultrasonic dispersion, let it stand for adsorption, centrifuge and separate, and dry until the moisture content ≤ 5%, to obtain bentonite - loaded composite; 3) Add 18 - 25 parts of quicklime to the remaining 35 - 45 parts of water in batches, stir and slake, and cool to room temperature to obtain a base material; 4) Add the prepared thickening liquid, bentonite - loaded composite, 2 - 4 parts of hydroxypropyl methylcellulose, and 2 - 3 parts of sodium polyacrylate to the base material, disperse ultrasonically, and grind through a colloid mill in a cycle for 2 - 3 times, and then sub - pack into moisture - proof sealed barrels to obtain a loaded tree whitewash.

[0010] Preferably, the pretreatment steps of the bentonite include: 1) According to the liquid - solid ratio of 3∶1, add bentonite and hydrochloric acid solution to a reaction vessel, stir, heat the reaction vessel to 55 - 60 °C, and react for 2 hours; 2) After the reaction, centrifuge to separate the bentonite solid, and rinse the separated bentonite with water until the pH value of the rinse liquid is neutral; 3) Place the rinsed bentonite in an oven and dry to constant weight to complete the pretreatment.

[0011] Preferably, the mass fraction of the hydrochloric acid solution is 15%.

[0012] After adopting the above - mentioned technical solution, the beneficial effects of the present invention are: 1. Using bentonite as a carrier, by loading a variety of active ingredients, the effective loading and slow release of the active ingredients are achieved, improving the stability and long - term efficacy of the active ingredients; 2. The present invention enhances the anti - gnawing function of the whitewash by adding a plant - derived synergist, has a natural repellent effect on animals, and can significantly reduce the risk of trees being gnawed. Specific Embodiments

[0013] In order to make the purpose, technical solution and advantages of the present invention clearer, the following further describes the present invention in detail with specific embodiments. It should be understood that the specific embodiments described here are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without some of these specific details. The following description of the embodiments is only for providing a better understanding of the present invention by showing examples of the present invention.

[0014] The present invention provides a supported tree whitewashing agent, which comprises raw materials in the following parts by mass: 40 - 55 parts of water, 18 - 25 parts of quicklime, 15 - 20 parts of bentonite, 3 - 4 parts of humic acid, 2.5 - 3.5 parts of sulfur powder, 2 - 4 parts of hydroxypropyl methylcellulose, 2 - 3 parts of nano calcium carbonate, 1 - 3 parts of isopentenyl adenosine, 4 - 6 parts of plant-derived synergist, 2 - 3 parts of sodium polyacrylate, 1 - 1.5 parts of adhesive, and 0.5 - 1 part of xanthan gum. The following are the specific preparation steps and technical details of the supported tree whitewashing agent.

[0015] Example 1 Step 1. Prepare materials 1) Preparation of thickening liquid Weigh sodium carboxymethyl cellulose and polyvinyl alcohol according to a mass ratio of 2:1 and compound them into an adhesive. Take 5 parts of water, add 0.5 part of xanthan gum and 1 part of adhesive, and stir until completely dissolved, with no visible particles visually, to obtain a thickening liquid.

[0016] The high viscosity property of xanthan gum can significantly improve the consistency of the whitewashing agent, make the particles of the tree whitewashing liquid evenly suspended without precipitation, and ensure that the coating adheres evenly to the surface of the tree trunk. Sodium carboxymethyl cellulose can improve the adhesion of the coating and reduce the peeling caused by rainwater scouring. Polyvinyl alcohol provides bonding and film-forming effects, enhancing the cohesion and anti-peeling property of the coating. The film formed by polyvinyl alcohol has strong weather resistance, can resist ultraviolet rays, rainwater erosion and temperature difference changes, and extend the coating validity period of the whitewashing agent.

[0017] Through the compounding of xanthan gum, sodium carboxymethyl cellulose and polyvinyl alcohol, the properties such as the viscosity, adhesion and durability of the whitewashing agent are significantly improved.

[0018] 2) Preparation of bentonite-supported composite Weigh 3 parts of reflective material, 2.5 parts of sulfur powder, 2 parts of nano calcium carbonate and 1 part of isopentenyl adenosine, put the above raw materials into a three-dimensional mixer, set the rotation speed at 80 rpm, and mix for 10 min to obtain a composite powder.

[0019] The reflective material is compounded by mica powder and titanium dioxide according to a mass ratio of 1:2, which can significantly improve the reflection performance of the coating, prevent sunburn damage, reduce the day-night temperature difference, and prevent the tree trunk from cracking due to too rapid temperature change. When the whitewashing agent is used for greening trees, it can increase the visibility of the coating at night or in low-light environments and improve driving safety.

[0020] Add 12% - 15% hydrochloric acid solution (mass fraction) to the reaction vessel. According to the liquid - solid ratio of 3:1 (mL / g), put in 15 parts of bentonite (powder). Start stirring, heat the reaction vessel to 55 - 60 °C, and keep the temperature constant for 2 hours. After the reaction, centrifuge to separate the bentonite solid, and rinse the separated bentonite with water until the pH value of the rinse solution is neutral. Transfer the rinsed bentonite to the drying oven and dry it at 105 °C to constant weight to complete the pretreatment.

[0021] Weigh matrine, peppermint oil and capsaicin according to the mass ratio of 3:1.5:1 and compound them into a plant - derived synergist. According to the solid - liquid ratio of 1:3 (g / mL), put 3 parts of humic acid and the pretreated bentonite into water, stir and mix, then add the composite powder and 4 parts of the plant - derived synergist, disperse ultrasonically for 15 - 20 min, stand for adsorption for 24 hours, and centrifuge to separate the solid matter. Dry the separated solid matter until the moisture content ≤ 5% to obtain the bentonite - loaded composite.

[0022] The acid - activated bentonite can expand its layer spacing, significantly increase the specific surface area. Acid treatment exposes more hydroxyl groups on its surface, enhancing the adsorption performance and loading capacity of bentonite, enabling it to load more active ingredients (such as nano - calcium carbonate, matrine, sulfur powder, capsaicin, etc.), and improving the persistence and stability of the drug effect.

[0023] Humic acid can improve the breathability of the coating, avoid the bark from getting stuffy and rotting. After being compounded with bentonite, it forms a porous slow - release carrier through ion exchange and adsorption, enhancing the loading capacity.

[0024] Sulfur powder has a broad - spectrum insecticidal and bactericidal effect, which is effective against a variety of pests and diseases, making the loaded tree whitewash have a wider scope of application.

[0025] Nano - calcium carbonate can provide nano - scale calcium ions, penetrate through the micro - cracks of the bark, strengthen the bark cell wall, and prevent split - bark disease. Nano - calcium carbonate also has a large specific surface area and good adsorption performance, and can be used as a carrier material to cooperate with bentonite to achieve the slow release and controlled release of active ingredients (such as matrine, sulfur powder), thus prolonging the duration of the drug effect of the whitewash.

[0026] Matrine has contact and stomach - poisoning effects on a variety of pests, and has significant effects on pests such as aphids, spider mites, and longhorn beetles. Its strong bitter taste property has a repellent effect on animals. The compounded capsaicin and peppermint oil can effectively prevent animals from gnawing on the bark through odor stimulation.

[0027] The amino acids, polysaccharide compounds, fatty acid compounds and flavonoid compounds contained in matrine itself, in cooperation with isopentenyl adenosine, enhance the self - healing ability of the wound.

[0028] 3) Preparation of the base material Add 18 portions of quicklime to 35 portions of water in three stages, with an interval of 20 min each time. Under mechanical stirring at 80 rpm, slake for 2.5 h, and then age for 24 h to obtain the base material.

[0029] Step Two: Loading and Final Product Forming Add the thickening liquid, bentonite-loaded composite material, 2 portions of hydroxypropyl methylcellulose, and 2 portions of sodium polyacrylate to the base material in sequence. Disperse ultrasonically for 20 min, and grind cyclically through a colloid mill 2 - 3 times. Then, sub-pack into moisture-proof sealed barrels to obtain the loaded tree whitewash.

[0030] Hydroxypropyl methylcellulose can ensure the uniform distribution of particles in the whitewash, play a role in preventing sedimentation, and improve the whitening effect. Sodium polyacrylate can adsorb on the surface of particles to keep the particles in a dispersed state.

[0031] Example 2 A preparation method of a loaded tree whitewash, comprising the following steps: 1) Take 8 portions of water, add 0.6 portion of xanthan gum and 1.2 portions of adhesive, and stir until completely dissolved to obtain the thickening liquid; 2) According to the solid-liquid ratio of 1:3, add 3.5 portions of humic acid and 17.5 portions of pretreated bentonite to water, stir and mix, add 3 portions of sulfur powder, 2.5 portions of nano-calcium carbonate, 3.5 portions of reflective material, 2 portions of isopentenyl adenosine, and 5 portions of plant-derived synergist. After ultrasonic dispersion, let it stand for adsorption, centrifuge, and dry until the moisture content ≤ 5% to obtain the bentonite-loaded composite material; 3) Add 20 portions of quicklime to 40 portions of water in batches, stir and slake to obtain the base material; 4) Add the prepared thickening liquid, bentonite-loaded composite material, 3 portions of hydroxypropyl methylcellulose, and 2.5 portions of sodium polyacrylate to the base material, disperse ultrasonically, and grind cyclically through a colloid mill 2 - 3 times. Then, sub-pack into moisture-proof sealed barrels to obtain the loaded tree whitewash.

[0032] Example 3 A preparation method of a loaded tree whitewash, comprising the following steps: 1) Take 10 portions of water, add 1 portion of xanthan gum and 1.5 portions of adhesive, and stir until completely dissolved to obtain the thickening liquid; 2) According to the solid-liquid ratio of 1:3, add 4 portions of humic acid and 20 portions of pretreated bentonite to water, stir and mix, add 3.5 portions of sulfur powder, 3 portions of nano-calcium carbonate, 5 portions of reflective material, 3 portions of isopentenyl adenosine, and 6 portions of plant-derived synergist. After ultrasonic dispersion, let it stand for adsorption, centrifuge, and dry until the moisture content ≤ 5% to obtain the bentonite-loaded composite material; 3) Add 25 portions of quicklime to 45 portions of water in batches, stir and slake to obtain the base material; 4) Add the prepared thickening liquid, bentonite-loaded composite, 4 parts of hydroxypropyl methylcellulose, and 3 parts of sodium polyacrylate to the base material, disperse ultrasonically, and grind through a colloid mill in a cycle for 2 - 3 times. Then, subpackage into moisture-proof sealed barrels to obtain the loaded tree whitewashing agent.

[0033] Perform performance tests on the samples of the three groups of examples and commercially available whitewashing agents (Guoguang Motai, Linsheng). Through systematic testing, evaluate the physical properties, functionality, component safety, and environmental adaptability of the loaded tree whitewashing agent, providing a scientific basis for product optimization and quality control.

[0034] Apply the above-mentioned whitewashing agent to three experimental forest areas. For each type of whitewashing agent in each experimental forest area, smear 50 trees respectively. The time window for applying the whitewashing agent is October 15th. At this stage, the balance between rapid curing of the coating and long-term protection can be achieved. Remove obstacles such as moss, lichen, and exfoliated bark, reduce the overwintering places of pests and diseases, smear the whitewashing agent around the trunk from the base upwards in a circular motion, smear in batches, with a moderate thickness each time, and apply an additional layer after the previous layer is slightly dry. The smearing height is from the ground to 1 - 1.5 meters. On March 15th of the following year, record the coating situation and calculate the average value. The experimental results are shown in Table 1.

[0035] Xanthan gum, sodium carboxymethyl cellulose, and polyvinyl alcohol act synergistically to form a high-strength adhesion system, ensuring that the coating adheres firmly to the trunk surface. While bentonite, as a loading carrier, further enhances the cohesion of the coating and reduces the risk of shedding. The optimized adhesion system and bentonite-loaded structure improve the stability of the coating in low-temperature environments and reduce the phenomenon of frost cracking. Traditional whitewashing agents (such as Guoguang Motai, Linsheng) mostly rely on lime-based and vegetable oil adhesion systems, and the coatings are prone to cracking and shedding.

[0036] The loaded tree whitewashing agent realizes the slow release of active substances through the bentonite loading technology, significantly prolongs the effective period, and improves the barrier rate. Most commercially available products use a single sulfur or organic copper bactericidal component, lack a slow-release carrier, have a short effective period, and thus have a limited barrier rate.

[0037] The bitter taste characteristic of matrine can trigger the instinctive aversion reaction of animals and has a repellent effect on animals. Capsaicin activates the TRPV1 receptor of mammals to cause a burning pain. The smell of peppermint oil interferes with the olfactory orientation of animals, forming a natural protection barrier and reducing the vulnerability to gnawing.

[0038] The compounding of titanium dioxide and mica powder can enhance the reflectivity, reduce the temperature difference between day and night, and significantly reduce the microcracks generated in the bark due to thermal expansion and contraction. Nano-calcium ions can penetrate into the bark cell wall and enhance the toughness.

[0039] Table 1 Comprehensive comparison table of experimental data

[0040] The coating integrity test is to evaluate the adhesion persistence of the whitening agent on the tree trunk surface. Conduct a 360° circumferential observation on each test tree and record the areas of coating peeling, cracking, and flaking.

[0041]

[0042] The pest and disease barrier rate test is to evaluate the barrier effect of the whitening agent on overwintering pests and diseases. Before application, count the number of pests and diseases remaining in the bark in the application area (such as scale insects, longhorn beetle larvae, spider mites). On March 15th of the following year, scrape off the coating to check the tree trunk surface and count the number of live pests and diseases.

[0043]

[0044] The gnawing rate test is to evaluate the protection effect of the whitening agent against animal gnawing (such as rabbits, mice, deer, cattle, sheep). Count the number and area of gnawing marks in the application area of each test tree. Install infrared cameras to monitor the animal activity frequency in the test forest area and analyze the causal relationship in combination with the gnawing marks.

[0045]

[0046] The frost crack rate test is to evaluate the preventive effect of the whitening agent on tree trunk frost cracks. Conduct a 360° circumferential inspection on each test tree and record the number of frost cracks.

[0047]

[0048] According to the embodiments of the present invention as described above, these embodiments do not elaborate on all details and do not limit the invention to only the specific embodiments. Obviously, many modifications and variations can be made according to the above description. The purpose of selecting and specifically describing these embodiments in this specification is to better explain the principles and practical applications of the present invention, so that those skilled in the relevant technical field can make good use of the present invention and its modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A supported tree whitewashing agent, characterized in that, It contains the following raw materials in parts by mass: 40 - 55 parts of water, 18 - 25 parts of quicklime, 15 - 20 parts of bentonite, 3 - 4 parts of humic acid, 2.5 - 3.5 parts of sulfur powder, 2 - 4 parts of hydroxypropyl methylcellulose, 2 - 3 parts of nano calcium carbonate, 1 - 3 parts of isopentenyladenosine, 4 - 6 parts of plant - derived synergist, 2 - 3 parts of sodium polyacrylate, 1 - 1.5 parts of adhesive, and 0.5 - 1 part of xanthan gum.

2. The supported tree whitewash agent according to claim 1, wherein: The plant - derived synergist is compounded from matrine, peppermint oil, and capsaicin in a mass ratio of 3∶1.5∶1.

3. The supported tree whitening agent according to claim 1, characterized in that: The load - type tree whitewash also includes 3 - 5 parts of reflective material.

4. The loaded tree whitewashing agent according to claim 3, characterized in that: The reflective material is compounded from mica powder and titanium dioxide in a mass ratio of 1∶2.

5. The loaded tree whitening agent according to claim 1, wherein: The adhesive is compounded by mixing sodium carboxymethyl cellulose and polyvinyl alcohol in a mass ratio of 2∶1.

6. A preparation method of the supported tree whitewashing agent as described in claim 1, characterized in that, It includes the following steps: 1) Take 5 - 10 parts of water, add 0.5 - 1 part of xanthan gum and 1 - 1.5 parts of adhesive, and stir until completely dissolved to obtain a thickening liquid. 2) According to a solid - liquid ratio of 1∶3, add 3 - 4 parts of humic acid and 15 - 20 parts of pretreated bentonite to water, stir and mix, add 2.5 - 3.5 parts of sulfur powder, 2 - 3 parts of nano calcium carbonate, 1 - 3 parts of isopentenyladenosine, and 4 - 6 parts of plant - derived synergist, perform ultrasonic dispersion, then static adsorption, centrifugal separation, and dry until the moisture content ≤5% to obtain a bentonite - loaded composite. 3) Add 18 - 25 parts of quicklime to the remaining 35 - 45 parts of water in batches, stir and slake, and cool to room temperature to obtain a base material. 4) Add the prepared thickening liquid, bentonite - loaded composite, 2 - 4 parts of hydroxypropyl methylcellulose, and 2 - 3 parts of sodium polyacrylate to the base material, perform ultrasonic dispersion, and circulate and grind through a colloid mill 2 - 3 times, and then sub - pack into moisture - proof sealed barrels to obtain the load - type tree whitewash.

7. The preparation method of the supported tree whitewashing agent according to claim 6, characterized in that, The pretreatment steps of the bentonite include: 1) According to a liquid - solid ratio of 3∶1, add bentonite and hydrochloric acid solution to a reaction vessel, stir, heat the reaction vessel to 55 - 60°C, and react for 2 hours. 2) After the reaction, centrifuge to separate the bentonite solid, and rinse the separated bentonite with water until the pH value of the rinse liquid is neutral. 3) Place the rinsed bentonite in an oven and dry it to a constant weight to complete the pretreatment.

8. The preparation method of the supported tree whitewash according to claim 7, characterized in that: The mass fraction of the hydrochloric acid solution is 15%.

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