Bamboo wood mildew preventive and bamboo wood mildew prevention method thereof
By utilizing the transpiration and solvent migration of bamboo inside the bamboo, low-carbon bamboo anti-mold treatment without high pressure and high temperature equipment is achieved, solving the problems of high energy consumption and wastewater discharge of traditional bamboo anti-mold treatment, and achieving a fast and lasting anti-mold effect.
Patent Information
- Application Number
- CN202311599134.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-28
- Publication Date
- 2025-07-25
AI Technical Summary
Traditional bamboo anti-mold treatment methods consume high energy and are highly toxic, and are difficult to achieve long-lasting anti-mold effect. They require high-pressure and high-temperature equipment, resulting in wastewater discharge and environmental pollution.
Inorganic salt and organic acid compound liquid are used as anti-mold agents, and vertical conduction is carried out by the transpiration of bamboo by guiding the tissue, and secondary migration is carried out in combination with solvent evaporation during drying to achieve uniform horizontal dispersion inside the bamboo, avoiding high-pressure and high-temperature equipment and wastewater discharge.
The rapid and low-carbon bamboo anti-mold treatment is achieved. The anti-mold agent is used to penetrate and spread through the longitudinal direction of the bamboo inside, achieving a lasting anti-mold effect without the need for high-pressure and high-temperature equipment and wastewater discharge.
Smart Images
Figure CN120363302A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of bamboo mildew prevention, and particularly relates to a bamboo mildew preventive agent and a bamboo mildew prevention method. Background Art
[0002] Bamboo is rich in nutrients such as starch, protein, and sugars, and is extremely prone to mildew. Mildew causes the surface of bamboo to show brown or black pollution, and the penetration depth of this pollution can reach several millimeters, making it difficult to remove, seriously affecting the aesthetics and service value of bamboo, greatly shortening the product service life cycle, restricting its application fields and high-value utilization. Therefore, the mildew prevention treatment process for bamboo is very important. However, compared with wood, bamboo lacks transverse tissues. Traditional mildew prevention treatment requires the use of high-pressure and high-temperature equipment for treatment. On the one hand, the energy consumption is large, and on the other hand, there is liquid exchange, resulting in a large amount of wastewater generation. Moreover, due to the limited penetration depth and easy loss, even after traditional mildew prevention treatment, the protection period in the outdoor environment is only 1 - 2 years. Therefore, the traditional mildew prevention treatment method not only has high energy consumption and high toxicity, causing great harm to the environment and human body, but also is difficult to achieve a lasting mildew prevention effect. Summary of the Invention
[0003] The technical problem to be solved by the present invention is to provide a bamboo mildew preventive agent and a bamboo mildew prevention method in view of the deficiencies of the above-mentioned prior art. This method utilizes the strong transpiration of bamboo leaves to conduct longitudinally through the conducting tissue, and through the secondary migration of the mildew preventive agent generated by the evaporation of the solvent (water, ethanol, etc.) during the drying and processing process, to achieve uniform lateral dispersion inside the bamboo. The mildew preventive agent used adopts water or alcohol as the solvent, and the mildew prevention functional components are metal ions such as silver and copper, and food-grade mildew prevention reagents such as citric acid, benzoic acid, and sorbic acid. This method does not require high-pressure and high-temperature equipment, has a fast processing speed, no wastewater discharge, has a good low-carbon emission reduction effect, and can be used for bamboo mildew prevention treatment.
[0004] To solve the above technical problem, the technical solution adopted by the present invention is: a bamboo mildew preventive agent, which is composed of an inorganic salt compound solution and an organic acid compound solution with a volume ratio of 1:1;
[0005] The inorganic salt compound solution is composed of the following raw materials with the final concentrations added with water: silver nitrate 100 mg / L - 500 mg / L, potassium nitrate 100 mg / L - 500 mg / L, and copper nitrate 500 mg / L - 1000 mg / L;
[0006] The organic acid compound solution is composed of the following raw materials with the final concentrations added with an ethanol aqueous solution with a volume fraction of 25%: benzoic acid 20 mg / L - 300 mg / L, sorbic acid 100 mg / L - 300 mg / L, and citric acid 20 mg / L - 300 mg / L.
[0007] Preferably, the inorganic salt compound solution is composed of raw materials with the following final concentrations added with water: silver nitrate 250 mg / L, potassium nitrate 400 mg / L, and copper nitrate 600 mg / L;
[0008] The organic acid compound solution is composed of raw materials with the following final concentrations added with an ethanol aqueous solution with a volume fraction of 25%: benzoic acid 50 mg / L, sorbic acid 200 mg / L, and citric acid 50 mg / L.
[0009] The present invention also provides a method for preventing mildew of bamboo using the above bamboo mildew preventive. The method is as follows:
[0010] S1. Select the second bamboo tube from the root of the upright-growing bamboo. Make a hole near the second bamboo joint at the upper part of the second bamboo tube, then insert into the hole, and engrave a deep mark around the inner wall of the bamboo at the position near the first bamboo joint at the lower part of the second bamboo tube to expose the vascular bundles inside the bamboo. Then inject the bamboo mildew preventive into the hole. The bamboo mildew preventive is transported upward to each bamboo joint through the vascular bundles exposed at the engraved part. After the bamboo mildew preventive is absorbed by the bamboo, the adsorbed bamboo is obtained;
[0011] The bamboo tubes of the upright-growing bamboo from the root upward are: the first bamboo tube, the second bamboo tube, the third bamboo tube...; the bamboo joints from the root upward are the first bamboo joint, the second bamboo joint, the second bamboo joint...;
[0012] Or after cutting down the bamboo along the root, clean the saw cut surface, and vertically insert the root of the newly cut bamboo into the bamboo mildew preventive for absorption to obtain the adsorbed bamboo;
[0013] S2. Dissect and preliminarily process the adsorbed bamboo obtained in S1, and then dry it at a temperature of 50 °C to 100 °C for 4 h to 12 h to obtain the mildew-proof bamboo.
[0014] The present invention has the following advantages compared with the prior art:
[0015] The bamboo mildew prevention treatment method of the present invention is different from the traditional mildew prevention impregnation treatment and surface treatment processes. It conducts mildew prevention treatment on newly cut bamboo or living bamboo, utilizes the strong transpiration of bamboo leaves to conduct longitudinally through the conducting tissue, and through the secondary migration of the mildew preventive during the drying process with the evaporation of solvents (such as water, ethanol, etc.), achieves uniform horizontal dispersion inside the bamboo. The mildew preventive used adopts water and alcohol as solvents, and the mildew prevention functional components are metal ions such as silver and copper, and food-grade mildew prevention reagents such as citric acid, benzoic acid, and sorbic acid. By engraving a deep mark around the inner wall of the bamboo, the vascular bundles at the engraved position are exposed, achieving the effect of rapid and efficient penetration and horizontal diffusion of the mildew preventive along the longitudinal vascular bundles. This method does not require high-pressure and high-temperature equipment, has a fast treatment speed, no wastewater discharge, has a good low-carbon emission reduction effect, and can be used for bamboo mildew prevention treatment.
[0016] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Description of the Drawings
[0017] Figure 1 It is a diagram showing the results of the discoloration bacteria test and the mold test for Example 1 of the present invention.
[0018] Figure 2 It is a diagram showing the results of the discoloration bacteria test and the mold test for Example 2 of the present invention.
[0019] Figure 3 It is a diagram showing the results of the discoloration bacteria test and the mold test for Example 3 of the present invention.
[0020] Figure 4 It is a diagram showing the results of the discoloration bacteria test and the mold test for Example 4 of the present invention.
[0021] Figure 5 It is a diagram showing the results of the discoloration bacteria test and the mold test for Example 5 of the present invention.
[0022] Figure 6 It is a diagram showing the results of the discoloration bacteria test and the mold test for Example 6 of the present invention. Detailed Embodiments
[0023] Example 1
[0024] The bamboo mildew preventive agent in this example is composed of an inorganic salt compound solution and an organic acid compound solution with a volume ratio of 1:1;
[0025] The inorganic salt compound solution is composed of the following raw materials with the final concentrations added with water: silver nitrate 250 mg / L, potassium nitrate 400 mg / L, and copper nitrate 600 mg / L;
[0026] The organic acid compound solution is composed of the following raw materials added with an ethanol aqueous solution with a volume fraction of 25%: benzoic acid 50 mg / L, sorbic acid 200 mg / L, and citric acid 50 mg / L.
[0027] This example also provides a method for preventing bamboo mildew with the above-mentioned bamboo mildew preventive agent, and the method is as follows:
[0028] S1. Select the second bamboo tube from the root of the upright-growing bamboo (Dendrocalamus sinicus), make a hole with a diameter of 30 mm near the second bamboo joint at the upper part of the second bamboo tube, then insert a tool into the hole, engrave a deep mark on the inner wall of the bamboo at the position near the first bamboo joint at the lower part of the second bamboo tube to expose the vascular bundles inside the bamboo, and then inject the bamboo mildew preventive agent into the hole. The bamboo mildew preventive agent is transported upward to each bamboo joint through the vascular bundles exposed at the engraved part. After 5 days, after the bamboo mildew preventive agent (2 L) is absorbed by the bamboo, the adsorbed bamboo is obtained;
[0029] The bamboo in this embodiment is Dendrocalamus sinicus. Since the bamboo poles of Dendrocalamus sinicus are as tall as 30 meters and the part below the branches is as high as 20 meters, it cannot stand upright to absorb the mildew-proof liquid after being cut down. Therefore, in this embodiment, the method of absorbing the mildew-proof liquid is to carry out mildew-proof treatment before cutting. Utilizing the transpiration pull generated by the evaporation of leaf moisture, the mildew-proof solution is transported upward along the ducts to every part of the standing Dendrocalamus sinicus. After observing that 2L has been absorbed by the whole bamboo and the absorption is complete after 7 days, the bamboo is cut down.
[0030] In this embodiment, deep grooves are engraved on the inner wall of the bamboo to expose the vascular bundles at the positions of the deep grooves, achieving the effect of rapid and efficient penetration and lateral diffusion of the mildew-proof agent along the longitudinal vascular bundles, with no liquid exchange and no discharge of treated wastewater. The mildew-proof treatment method in this embodiment uses the powerful water transmission of the bamboo itself as the driving force, replacing the traditional high-temperature and high-pressure treatment technology.
[0031] S2. The adsorbed bamboo obtained in S1 is split and preliminarily processed, and then dried at a temperature of 80 °C for 10 h, which can play a role in strengthening the fixation of the mildew-proof agent, and mildew-proof bamboo materials are obtained.
[0032] For the bamboo materials, 1 m is intercepted from above 1.3 m at the ground base as test materials for mildew and discoloration bacteria tests. The bamboo green and bamboo yellow are planed off, and the bamboo flesh layer is used as the specimen, with dimensions of 50 mm * 20 mm * 5 mm. 6 pieces of bamboo materials treated with each reagent are taken, and another 6 pieces of untreated bamboo materials are taken as the control group to determine the activity of the test bacteria used and calculate the control efficacy.
[0033] The test bacteria selected are Botryodiplodia thebromae Pat. for discoloration bacteria and Aspergillus niger V. Tiegh for mildew. After the specimens are inoculated, they are cultured in an incubator (temperature 25 °C, relative humidity 85%) for 4 weeks. Then, the visually observed infection area of the test bacteria is used, and the control efficacy is calculated according to formula (1).
[0034]
[0035] In the formula:
[0036] E - Control efficacy, %;
[0037] D1 - Average infection value of the specimens treated with the agent;
[0038] D0 - Average infection value of the untreated control specimens.
[0039] The results of the discoloration bacteria test and the mildew test are as Figure 1 shown. The left side is the treatment for discoloration bacteria, and the right side is the treatment for mildew. There are no hyphae and mildew spots on the surface of the specimens, and the control efficacy of discoloration bacteria and mildew reaches 100%.
[0040] Example 2
[0041] The bamboo mildew preventive agent of this example is composed of an inorganic salt compound solution and an organic acid compound solution with a volume ratio of 1:1;
[0042] The inorganic salt compound solution is composed of the following raw materials with the final concentrations added with water: silver nitrate 250 mg / L, potassium nitrate 400 mg / L, and copper nitrate 600 mg / L;
[0043] The organic acid compound solution is composed of the following raw materials with the final concentrations added with an ethanol aqueous solution with a volume fraction of 25%: benzoic acid 50 mg / L, sorbic acid 200 mg / L, and citric acid 50 mg / L.
[0044] This example also provides a method for preventing mildew of bamboo using the above bamboo mildew preventive agent, and the method is as follows:
[0045] S1. Conducted on a sunny day, when the ambient temperature is 20°C - 35°C, the vitality of bamboo leaves is high. After cutting the bamboo (Phyllostachys edulis) along the root, clean the sawed surface, and vertically insert the root of the newly cut bamboo into the bamboo mildew preventive agent (800 mL) for absorption. After 2 days of absorption, the absorption is completed to obtain the adsorbed bamboo;
[0046] In this example, the life activities of the tissue cells of the newly cut bamboo are still vigorous. The vascular bundles exposed through the sawed cross-section can absorb the mildew preventive agent. Utilizing the transpiration pull generated by water evaporation, the mildew preventive agent is transported to each part of the bamboo along the ducts;
[0047] S2. Dissect and preprocess the adsorbed bamboo obtained in S1, and then dry it at 80°C for 8 h to obtain the mildew-proof bamboo.
[0048] The test methods for molds and discoloring fungi are the same as those in Example 1.
[0049] The results of the discoloring fungi test and the mold test are as Figure 2 shown. The left side is the treatment of discoloring fungi, and the right side is the treatment of molds. There are no hyphae and mildew spots on the surface of the specimens, and the control efficacy of discoloring fungi and molds reaches 100%.
[0050] Example 3
[0051] The bamboo mildew preventive agent of this example is composed of an inorganic salt compound solution and an organic acid compound solution with a volume ratio of 1:1;
[0052] The inorganic salt compound solution is composed of the following raw materials with the final concentrations added with water: silver nitrate 100 mg / L, potassium nitrate 100 mg / L, and copper nitrate 1000 mg / L;
[0053] The organic acid compound solution is composed of raw materials with the following final concentrations and 25% ethanol aqueous solution by volume: benzoic acid 20 mg / L, sorbic acid 100 mg / L, and citric acid 20 mg / L.
[0054] This embodiment also provides a method for preventing bamboo mildew using the above bamboo mildew preventive. The method is as follows:
[0055] S1. Select the second bamboo tube from the root of the upright-growing bamboo (Gigantochloa scortechinii). Make a hole with a diameter of 30 mm near the second bamboo joint at the upper part of the second bamboo tube. Then insert a tool into the hole and engrave a deep mark around the inner wall of the bamboo at the position near the first bamboo joint at the lower part of the second bamboo tube, exposing the vascular bundles inside the bamboo. Then inject the bamboo mildew preventive into the hole. The bamboo mildew preventive is transported upward to each bamboo joint through the vascular bundles exposed at the engraved part. After 5 days, after the bamboo mildew preventive (2 L) is absorbed by the bamboo, the adsorbed bamboo is obtained.
[0056] S2. Split and preprocess the adsorbed bamboo obtained in S1, and then dry it at 50 °C for 12 h to obtain the mildew-proof bamboo.
[0057] The test methods for molds and discoloration fungi are the same as those in Example 1.
[0058] The test results of discoloration fungi and molds are as Figure 3 shown. The left side is the treatment of discoloration fungi, and the right side is the treatment of molds. There are local hyphae on the surface of the discoloration fungi specimen, and the infection area is less than 1 / 4, and the control efficacy is 75%; there are no hyphae and mildew spots on the surface of the mold specimen, and the control efficacy reaches 100%.
[0059] Example 4
[0060] The bamboo mildew preventive in this embodiment is composed of an inorganic salt compound solution and an organic acid compound solution with a volume ratio of 1:1;
[0061] The inorganic salt compound solution is composed of the following raw materials and water: silver nitrate 500 mg / L, potassium nitrate 500 mg / L, and copper nitrate 500 mg / L;
[0062] The organic acid compound solution is composed of the following raw materials and 25% ethanol aqueous solution by volume: benzoic acid 300 mg / L, sorbic acid 300 mg / L, and citric acid 300 mg / L.
[0063] This embodiment also provides a method for preventing bamboo mildew using the above bamboo mildew preventive. The method is as follows:
[0064] S1. Select the second bamboo tube from the root of the vertically growing bamboo (Dendrocalamus sinicus). Make a hole with a diameter of 30 mm near the second bamboo joint at the upper part of the second bamboo tube. Then insert a tool into the hole and engrave a deep mark around the inner wall of the bamboo tube at the position near the first bamboo joint at the lower part of the second bamboo tube to expose the vascular bundles inside the bamboo material. Then inject bamboo material mildew-proof agent into the hole. The bamboo material mildew-proof agent is transported upward through the vascular bundles exposed at the engraved mark part to each bamboo joint. After 5 days, when the bamboo material mildew-proof agent (2 L) is absorbed by the bamboo, the adsorbed bamboo is obtained;
[0065] S2. Split and preliminarily process the adsorbed bamboo obtained in S1, and then dry it at a temperature of 100 °C for 4 h to obtain mildew-proof bamboo material.
[0066] The test methods for molds and discoloration fungi are the same as those in Example 1.
[0067] The results of the discoloration fungi test and the mold test are as Figure 4 shown. The left side is the treatment of discoloration fungi, and the right side is the treatment of molds. There are local hyphae on the surface of the discoloration fungi specimen, and the infection area is less than 1 / 2, and the control efficacy is 50%; there are no hyphae and mold spots on the surface of the mold specimen, and the control efficacy reaches 100%.
[0068] Example 5
[0069] The bamboo material mildew-proof agent in this example is composed of an inorganic salt compound solution and an organic acid compound solution with a volume ratio of 1:1;
[0070] The inorganic salt compound solution is composed of the following raw materials with the final concentrations added with water: silver nitrate 100 mg / L, potassium nitrate 500 mg / L, and copper nitrate 1000 mg / L;
[0071] The organic acid compound solution is composed of the following raw materials with the final concentrations added with an ethanol aqueous solution with a volume fraction of 25%: benzoic acid 20 mg / L, sorbic acid 300 mg / L, and citric acid 20 mg / L.
[0072] This example also provides a method for preventing mildew of bamboo materials with the above bamboo material mildew-proof agent. The method is as follows:
[0073] S1. Conduct in sunny weather. When the environmental temperature is 20 °C to 35 °C, the vitality of bamboo leaves is high. After cutting the bamboo material (Phyllostachys edulis) along the root, clean the saw cut surface, and vertically insert the root of the newly cut bamboo material into the bamboo material mildew-proof agent (500 mL) for absorption. After 2 days of absorption, the absorption is completed, and the adsorbed bamboo is obtained;
[0074] S2. Split and preliminarily process the adsorbed bamboo obtained in S1, and then dry it at a temperature of 50 °C for 12 h to obtain mildew-proof bamboo material.
[0075] The test methods for mildew and discoloration bacteria are the same as those in Example 1.
[0076] The test results of discoloration bacteria and mildew are as Figure 5 shown. The left side is the treatment of discoloration bacteria, and the right side is the treatment of mildew. There are local hyphae on the surface of the discoloration bacteria specimen, and the infection area is less than 1 / 4, and the control efficacy is 75%; there are no hyphae and mildew spots on the surface of the mildew specimen, and the control efficacy reaches 100%.
[0077] Example 6
[0078] The bamboo mildew preventive of this example is composed of an inorganic salt compound solution and an organic acid compound solution with a volume ratio of 1:1;
[0079] The inorganic salt compound solution is composed of the following raw materials with the final concentrations added with water: silver nitrate 500 mg / L, potassium nitrate 100 mg / L, and copper nitrate 500 mg / L;
[0080] The organic acid compound solution is composed of the following raw materials added with an ethanol aqueous solution with a volume fraction of 25%: benzoic acid 300 mg / L, sorbic acid 100 mg / L, and citric acid 300 mg / L.
[0081] This example also provides a method for preventing mildew of bamboo using the above bamboo mildew preventive. The method is as follows:
[0082] S1. Conducted on a sunny day, when the environmental temperature is 20°C to 35°C, the vitality of bamboo leaves is high. After cutting the bamboo (Phyllostachys edulis) along the root, clean the sawn surface, and vertically insert the root of the newly cut bamboo into the bamboo mildew preventive (300 mL) for absorption. After 2 days of absorption, the absorption is completed to obtain the adsorbed bamboo;
[0083] S2. Split and initially process the adsorbed bamboo obtained in S1, and then dry it at a temperature of 100°C for 4 h to obtain the mildew-proof bamboo.
[0084] The test methods for mildew and discoloration bacteria are the same as those in Example 1.
[0085] The test results of discoloration bacteria and mildew are as Figure 6 shown. The left side is the treatment of discoloration bacteria, and the right side is the treatment of mildew. There are local hyphae on the surface of the discoloration bacteria specimen, and the infection area is less than 1 / 4, and the control efficacy is 75%; there are no hyphae and mildew spots on the surface of the mildew specimen, and the control efficacy reaches 100%.
[0086] The above are only the preferred embodiments of the present invention and do not impose any limitations on the present invention. Any simple modifications, changes, and equivalent changes made to the above embodiments according to the technical essence of the invention still fall within the protection scope of the technical solution of the present invention.
Claims
1. A bamboo mildew preventive, characterized in that, It is composed of an inorganic salt compound solution and an organic acid compound solution with a volume ratio of 1:1; The inorganic salt compound solution is composed of the following raw materials with the following final concentrations added with water: silver nitrate 100 mg / L to 500 mg / L, potassium nitrate 100 mg / L to 500 mg / L, and copper nitrate 500 mg / L to 1000 mg / L; The organic acid compound solution is composed of the following raw materials with the following final concentrations added with an ethanol aqueous solution with a volume fraction of 25%: benzoic acid 20 mg / L to 300 mg / L, sorbic acid 100 mg / L to 300 mg / L, and citric acid 20 mg / L to 300 mg / L.
2. The bamboo mildew preventive according to claim 1, characterized in that, The inorganic salt compound solution is composed of the following raw materials with the following final concentrations added with water: silver nitrate 250 mg / L, potassium nitrate 400 mg / L, and copper nitrate 600 mg / L; The organic acid compound solution is composed of the following raw materials with the following final concentrations added with an ethanol aqueous solution with a volume fraction of 25%: benzoic acid 50 mg / L, sorbic acid 200 mg / L, and citric acid 50 mg / L.
3. A method for preventing mildew of bamboo using the bamboo mildew preventive agent according to claim 1 or 2, characterized in that, The method is as follows: S1. Select the second bamboo tube at the root of the vertically growing bamboo. Make a hole near the second bamboo joint at the upper part of the second bamboo tube, then insert into the hole, engrave a deep mark around the inner wall of the bamboo at the position near the first bamboo joint at the lower part of the second bamboo tube to expose the vascular bundles inside the bamboo material, and then inject the bamboo material mildew-proof agent into the hole. After the bamboo material mildew-proof agent is absorbed by the bamboo, the adsorbed bamboo is obtained; Or after cutting the bamboo along the root, clean the sawed surface, and vertically insert the root of the newly cut bamboo into the bamboo material mildew-proof agent for absorption to obtain the adsorbed bamboo; S2. Dissect and preliminarily process the adsorbed bamboo obtained in S1, and then dry it at a temperature of 50°C to 100°C for 4 h to 12 h to obtain the mildew-proof bamboo material.