Environment-friendly composite tree wound healing agent as well as preparation method and application thereof

Abstract

The invention discloses an environment-friendly composite tree wound healing agent and a preparation method and application thereof, and belongs to the technical field of garden maintenance, the environment-friendly composite tree wound healing agent comprises the following raw materials by weight: 40-70 parts of a film forming substrate, 10-20 parts of an active component, and 10-20 parts of a functional auxiliary agent; the film-forming substrate is prepared from the following raw materials in parts by weight: 10 to 20 parts of chitosan, 20 to 30 parts of modified starch and 10 to 20 parts of vegetable wax; the active component is prepared from the following raw materials in parts by weight: 0.1 to 0.5 part of indolebutyric acid, 5 to 10 parts of tea tree essential oil, 3 to 5 parts of radix scutellariae extract, 1 to 2 parts of zinc sulfate and 0.5 to 1 part of boric acid; the functional additive comprises the following raw materials in parts by weight: 2-5 parts of nano titanium dioxide, 3-5 parts of a thickening agent and 5-10 parts of a humectant; the positive effect is achieved on tree wound healing.

Description

Technical Field

[0001] The present invention relates to the field of garden maintenance, and in particular to an environmentally friendly composite tree wound healing agent, a preparation method and application thereof. Background Art

[0002] Existing tree wound treatment agents often use paraffin, asphalt, or synthetic resins as their film-forming matrix. These agents suffer from the following drawbacks: poor environmental performance, the presence of petroleum derivatives, difficulty in degradation, and soil contamination; limited functionality: lacking active ingredients that promote healing and merely physically sealing the wound; and insufficient weather resistance: susceptible to rainwater erosion and UV degradation, requiring frequent reapplication. Therefore, there is an urgent need to develop new healing agents that combine environmental friendliness, bioactivity, and long-lasting protection. Currently, most common tree wound healing agents are formulated with pesticides and fungicides (e.g., Patent No. CN103053615B, entitled "A Wound Healing Agent for Damaged Trees") or organic synthetic additives (e.g., Patent No. CN102334514B, entitled "Tree Wound Healing Protective Agent and Preparation Method thereof"). These agents pose environmental and safety risks during production. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides an environmentally friendly composite tree wound healing agent and a preparation method and application thereof.

[0004] The purpose of the present invention can be achieved through the following technical solutions: An environmentally friendly composite tree wound healing agent comprises the following raw materials in parts by weight: 40-70 parts of a film-forming matrix, 10-20 parts of an active ingredient, and 10-20 parts of a functional additive; The film-forming matrix comprises the following raw materials in parts by weight: 10-20 parts of chitosan, 20-30 parts of modified starch, and 10-20 parts of plant wax; The active ingredient comprises the following raw materials in parts by weight: 0.1-0.5 parts of indolebutyric acid, 5-10 parts of tea tree essential oil, 3-5 parts of scutellaria baicalensis extract, 1-2 parts of zinc sulfate, and 0.5-1 part of boric acid; The functional additive comprises the following raw materials in parts by weight: 2-5 parts of nano titanium dioxide, 3-5 parts of thickener, and 5-10 parts of moisturizer.

[0005] Furthermore, the vegetable wax is formed by mixing beeswax and palm wax in a weight ratio of 1:1.

[0006] Furthermore, the thickener is xanthan gum, and the humectant is glycerin.

[0007] The preparation method of the environmentally friendly composite tree wound healing agent comprises the following steps: The first step is to add chitosan to a 1% acetic acid aqueous solution, heat it to 50-52°C, and stir it at a speed of 300-500 r / min for 30-50 minutes. After stirring, add modified starch, heat it to 60-62°C, and stir it at a speed of 800-1000 r / min for 30 minutes to prepare a gel. The weight ratio of chitosan to acetic acid aqueous solution is controlled to be 1:15-20. Step 2: Heat the vegetable wax to 75-80°C, melt it, add it to the gel, add a thickener and a moisturizer in sequence, and use a high-pressure homogenizer at 60-65°C and 20-25MPa for 2-3 cycles to prepare an emulsion; The third step is to cool the prepared emulsion to 35-40°C, add indoleacetic acid, tea tree essential oil, scutellaria baicalensis extract, nano-titanium dioxide, zinc sulfate and boric acid, and ultrasonically disperse for 15-20 minutes under light-proof conditions to prepare an environmentally friendly composite tree wound healing agent.

[0008] Furthermore, the chitosan has a deacetylation degree of ≥85% and a viscosity of 100-200 mPa•s.

[0009] Furthermore, the modified starch is hydroxypropyl modified starch with a degree of substitution of 0.04-0.06.

[0010] Furthermore, in the third step, the indoleacetic acid is solubilized with ethanol at a weight ratio of 1:10.

[0011] Environmentally friendly composite tree wound healing agent in tree wound healing Beneficial effects of the present invention: The present invention prepares an environmentally friendly composite tree wound healing agent, which has the following advantages: Molecular interpenetrating network: Chitosan (with positively charged amino groups) and hydroxypropyl starch (hydroxyl etherification) form a three-dimensional network skeleton through hydrogen bonding and electrostatic interactions, giving the membrane high mechanical strength. Plant wax gradient distribution: During the homogenization process, molten beeswax is embedded in the network pores in the form of nanodroplets, forming a hydrophobic barrier while allowing oxygen to pass through, achieving "breathable waterproofing." Fully biodegradable: According to ISO 14855 composting test, the degradation rate is greater than 90% in 180 days, which is much higher than that of petrochemical-based products (degradation rate <10%).

[0012] Temporal and spatial controlled release design: Plant hormone (IBA): slowly released through chitosan-starch gel, continuously stimulating cambium cell division; Antibacterial ingredients: Tea tree essential oil (terpenes) quickly kills surface pathogens, and scutellaria flavonoids penetrate into the xylem to inhibit endogenous fungi; Trace elements: Zinc ions activate peroxidase and enhance the stress resistance of callus tissue.

[0013] 4. Construction of bionic weather-resistant protective layer: Directed arrangement of nano-titanium dioxide: Ultrasonic dispersion enables TiO2 particles (rutile type) to form a dense reflective layer on the film surface, while retaining visible light transmission to maintain bark photosynthesis; Self-healing properties of plant wax: When the film layer is mechanically damaged, the ambient heat (>35°C) triggers the wax to flow and fill microcracks, restoring the waterproof performance. DETAILED DESCRIPTION

[0014] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0015] Example 1: An environmentally friendly composite tree wound healing agent comprising the following raw materials in parts by weight: 40 parts of a film-forming matrix, 10 parts of an active ingredient, and 10 parts of a functional additive; The film-forming matrix comprises the following raw materials in parts by weight: 10 parts of chitosan, 20 parts of modified starch, and 10 parts of vegetable wax; The active ingredient comprises the following raw materials in parts by weight: 0.1 parts of indolebutyric acid, 5 parts of tea tree essential oil, 3 parts of scutellaria baicalensis extract, 1 part of zinc sulfate, and 0.5 parts of boric acid; The functional additive comprises the following raw materials in parts by weight: 2 parts of nano titanium dioxide, 3 parts of thickener, and 5 parts of moisturizer.

[0016] The vegetable wax is prepared by mixing beeswax and palm wax in a weight ratio of 1:1.

[0017] The thickener is xanthan gum, and the humectant is glycerin.

[0018] The preparation method of the environmentally friendly composite tree wound healing agent comprises the following steps: The first step is to add chitosan to a 1% acetic acid aqueous solution, heat it to 50°C, and stir it at 300 r / min for 30 minutes. After stirring, add modified starch, heat it to 60°C, and stir it at 800 r / min for 30 minutes to prepare a gel. The weight ratio of chitosan to acetic acid aqueous solution is controlled to be 1:15-20. In the second step, the vegetable wax is heated to 75°C, melted, and added to the gel, followed by the addition of a thickener and a moisturizer. The mixture is then subjected to a high-pressure homogenizer at 60°C and 20 MPa for three cycles to obtain an emulsion. The third step is to cool the prepared emulsion to 35°C, add indoleacetic acid, tea tree essential oil, scutellaria baicalensis extract, nano-titanium dioxide, zinc sulfate and boric acid, and ultrasonically disperse it for 15 minutes under light-proof conditions to prepare an environmentally friendly composite tree wound healing agent.

[0019] The chitosan has a deacetylation degree of ≥85% and a viscosity of 100-200 mPa•s.

[0020] The modified starch is hydroxypropyl modified starch with a substitution degree of 0.04-0.06.

[0021] In the third step, the indoleacetic acid is solubilized with ethanol at a weight ratio of 1:10.

[0022] The prepared wound healing agent was applied to poplar wounds and then subjected to accelerated aging verification: UV aging: According to the ASTM G154-16 cyclic test (UVB 313 lamp, 60℃ / 4h condensation / 4h), the film integrity was greater than 90% after 500 hours (the acrylic resin in the control group cracked and fell off); rain erosion simulation: Using the SAE J2276 standard (water flow impact force 2.5 MPa), the mass loss rate was less than 3% after 6 hours of continuous scouring; actual application tracking: In the subtropical monsoon climate zone (average annual rainfall of 1500mm), the wounds coated with this formulation showed no bacterial invasion within 6 months, and the callus cork completion rate was 100%.

[0023] Experimental data: In a poplar pruning model, this environmentally friendly composite tree wound healing agent shortened the time for complete callus coverage to 18±2 days (the control group's paraffin-based product required 26±3 days), and increased the xylem vessel regeneration rate by 35%. Its antibacterial properties passed the ISO 20743 standard test, with a kill rate of >99% against common pathogens (such as Botrytis cinerea and Fusarium).

[0024] After pruning a garden tree, the wound surface is cleaned, and then the garden tree wound healing agent of the present invention is evenly applied or sprayed on the wound to form a protective film. After observation over a period of time, it was found that the wounds applied or sprayed with the healing agent healed significantly faster, the bark at the wound site grew well, and there was no infection or rot. At the same time, after being exposed to rain and sunlight, the healing agent still maintained good adhesion and protective effects, indicating that the garden tree wound healing agent of the present invention has a good application effect.

[0025] Example 2: An environmentally friendly composite tree wound healing agent comprising the following raw materials in parts by weight: 60 parts of a film-forming matrix, 15 parts of an active ingredient, and 15 parts of a functional additive; The film-forming matrix comprises the following raw materials in parts by weight: 15 parts of chitosan, 25 parts of modified starch, and 15 parts of plant wax; The active ingredient comprises the following raw materials in parts by weight: 0.3 parts of indolebutyric acid, 8 parts of tea tree essential oil, 4 parts of scutellaria baicalensis extract, 1.5 parts of zinc sulfate, and 0.8 parts of boric acid; The functional additive comprises the following raw materials in parts by weight: 4 parts of nano titanium dioxide, 4 parts of thickener, and 8 parts of moisturizer.

[0026] The vegetable wax is prepared by mixing beeswax and palm wax in a weight ratio of 1:1.

[0027] The thickener is xanthan gum, and the humectant is glycerin.

[0028] The preparation method of the environmentally friendly composite tree wound healing agent comprises the following steps: The first step was to add chitosan to a 1% acetic acid aqueous solution, heat it to 50°C, and stir it at 400 r / min for 40 minutes. After stirring, modified starch was added, and the temperature was raised to 62°C. Stir it at 900 r / min for 30 minutes to prepare a gel. The weight ratio of chitosan to acetic acid aqueous solution was controlled to be 1:18. In the second step, the vegetable wax is heated to 78°C, melted, and added to the gel, followed by the addition of a thickener and a humectant. The mixture is then subjected to a high-pressure homogenizer at 62°C and 24 MPa for two cycles to obtain an emulsion. The third step is to cool the prepared emulsion to 38°C, add indoleacetic acid, tea tree essential oil, scutellaria baicalensis extract, nano-titanium dioxide, zinc sulfate and boric acid, and ultrasonically disperse it for 18 minutes under light-proof conditions to prepare an environmentally friendly composite tree wound healing agent.

[0029] The chitosan has a deacetylation degree of ≥85% and a viscosity of 100-200 mPa•s.

[0030] The modified starch is hydroxypropyl modified starch with a substitution degree of 0.04-0.06.

[0031] In the third step, the indoleacetic acid is solubilized with ethanol at a weight ratio of 1:10.

[0032] Example 3: An environmentally friendly composite tree wound healing agent comprising the following raw materials in parts by weight: 70 parts of a film-forming matrix, 20 parts of an active ingredient, and 20 parts of a functional additive; The film-forming matrix comprises the following raw materials in parts by weight: 20 parts of chitosan, 30 parts of modified starch, and 20 parts of vegetable wax; The active ingredient comprises the following raw materials in parts by weight: 0.5 parts of indolebutyric acid, 10 parts of tea tree essential oil, 5 parts of scutellaria baicalensis extract, 2 parts of zinc sulfate, and 1 part of boric acid; The functional additive comprises the following raw materials in parts by weight: 5 parts of nano titanium dioxide, 5 parts of thickener, and 10 parts of moisturizer.

[0033] The vegetable wax is prepared by mixing beeswax and palm wax in a weight ratio of 1:1.

[0034] The thickener is xanthan gum, and the humectant is glycerin.

[0035] The preparation method of the environmentally friendly composite tree wound healing agent comprises the following steps: The first step is to add chitosan to a 1% acetic acid aqueous solution, heat it to 52°C, and stir it at 500 r / min for 30-50 minutes. After stirring, add modified starch, heat it to 62°C, and stir it at 1000 r / min for 30 minutes to prepare a gel. The weight ratio of chitosan to acetic acid aqueous solution is controlled to be 1:20. In the second step, the vegetable wax is heated to 80°C, melted, and added to the gel, followed by the addition of a thickener and a moisturizer. The mixture is then subjected to a high-pressure homogenizer at 65°C and 25 MPa for three cycles to obtain an emulsion. The third step is to cool the prepared emulsion to 40°C, add indoleacetic acid, tea tree essential oil, scutellaria baicalensis extract, nano-titanium dioxide, zinc sulfate and boric acid, and ultrasonically disperse it for 20 minutes under light-proof conditions to prepare an environmentally friendly composite tree wound healing agent.

[0036] The chitosan has a deacetylation degree of ≥85% and a viscosity of 100-200 mPa•s.

[0037] The modified starch is hydroxypropyl modified starch with a substitution degree of 0.04-0.06.

[0038] In the third step, the indoleacetic acid is solubilized with ethanol at a weight ratio of 1:10.

[0039] The above content is merely an example and explanation of the concept of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. An environmentally friendly composite tree wound healing agent, characterized in that: The composition comprises the following raw materials in parts by weight: 40-70 parts of film-forming matrix, 10-20 parts of active ingredient, and 10-20 parts of functional additive; The film-forming matrix comprises the following raw materials in parts by weight: 10-20 parts of chitosan, 20-30 parts of modified starch, and 10-20 parts of plant wax; The active ingredient comprises the following raw materials in parts by weight: 0.1-0.5 parts of indolebutyric acid, 5-10 parts of tea tree essential oil, 3-5 parts of scutellaria baicalensis extract, 1-2 parts of zinc sulfate, and 0.5-1 part of boric acid; The functional additive comprises the following raw materials in parts by weight: 2-5 parts of nano titanium dioxide, 3-5 parts of thickener, and 5-10 parts of moisturizer.

2. The environmentally friendly composite tree wound healing agent according to claim 1, characterized in that: The vegetable wax is prepared by mixing beeswax and palm wax in a weight ratio of 1:

1.

3. The environmentally friendly composite tree wound healing agent according to claim 1, characterized in that: The thickener is xanthan gum, and the humectant is glycerin.

4. The preparation method of the environmentally friendly composite tree wound healing agent according to claim 1, characterized in that: The steps include: The first step is to add chitosan to a 1% acetic acid aqueous solution, heat it to 50-52°C, and stir it at a speed of 300-500 r / min for 30-50 minutes. After stirring, add modified starch, heat it to 60-62°C, and stir it at a speed of 800-1000 r / min for 30 minutes to prepare a gel. The weight ratio of chitosan to acetic acid aqueous solution is controlled to be 1:15-20. Step 2: Heat the vegetable wax to 75-80°C, melt it, add it to the gel, add a thickener and a moisturizer in sequence, and use a high-pressure homogenizer at 60-65°C and 20-25MPa for 2-3 cycles to prepare an emulsion; The third step is to cool the prepared emulsion to 35-40°C, add indoleacetic acid, tea tree essential oil, scutellaria baicalensis extract, nano-titanium dioxide, zinc sulfate and boric acid, and ultrasonically disperse for 15-20 minutes under light-proof conditions to prepare an environmentally friendly composite tree wound healing agent.

5. The method for preparing the environmentally friendly composite tree wound healing agent according to claim 4, wherein: The chitosan has a deacetylation degree of ≥85% and a viscosity of 100-200 mPa•s.

6. The method for preparing the environmentally friendly composite tree wound healing agent according to claim 4, wherein: The modified starch is hydroxypropyl modified starch with a substitution degree of 0.04-0.

06.

7. The method for preparing the environmentally friendly composite tree wound healing agent according to claim 4, wherein: In the third step, the indoleacetic acid is solubilized with ethanol at a weight ratio of 1:

10.

8. Use of the environmentally friendly composite tree wound healing agent according to claim 1 in tree wound healing.