Anti-corrosion and anti-mildew treatment method for wood and bamboo products and anti-corrosion and anti-mildew wood and bamboo products

Abstract

The invention discloses an anti-corrosion and anti-mildew treatment method for a wood and bamboo product and the anti-corrosion and anti-mildew wood and bamboo product in the technical field of wood and bamboo anti-corrosion and anti-mildew. The method comprises the following steps: carrying out vacuum dipping treatment on the wood and bamboo product by using an anti-corrosion and anti-mildew agent; and the wood and bamboo products subjected to vacuum dipping treatment are placed in a high-voltage electrostatic field to be subjected to high-voltage electric field treatment. According to the anti-corrosion and anti-mildew treatment method for the wood and bamboo products, the problems of wood structure damage, chemical component degradation, physical and mechanical property reduction and the like caused by chemical treatment and physical treatment are solved, the fixation performance of the anti-corrosion and anti-mildew agent is improved, and the wood and bamboo products can better obtain higher anti-corrosion, anti-mildew and high-durability effects on the whole.

Description

Technical Field

[0001] The invention relates to the technical field of wood and bamboo material anticorrosion and mildew resistance, and in particular to an anticorrosion and mildew resistance treatment method for wood and bamboo products and the anticorrosion and mildew resistance wood and bamboo products. Background Art

[0002] Wood and bamboo are recognized as renewable and sustainable biomaterials in the world today. Wood and bamboo are deeply loved by people because of their unique beauty and superior material properties given by nature. However, due to the nutrients in wood and bamboo, they are easily damaged by fungi, bacteria and various insect pests under certain temperature and humidity conditions, causing wood and bamboo to decay or discolor, which brings serious economic losses to the production and processing of wood and bamboo. Anti-corrosion and mildew-proof treatment of wood and bamboo can improve the antibacterial and insecticidal properties of wood and bamboo, thereby preventing the destruction of wood and bamboo. Prolonging the service life of wood and bamboo is an important way to save wood and bamboo resources, improve the utilization efficiency of wood and bamboo, and increase the function of wood products. According to statistics of a large number of test results at home and abroad, the service life of wood and bamboo treated with anti-corrosion and mildew is twice that of untreated wood and bamboo. For outdoor materials, since they are placed in conditions prone to decay and insect pests for a long time, and are also subject to relatively harsh climatic conditions, only after certain anti-corrosion and mildew-proof treatment can their long-term and safe outdoor use be guaranteed.

[0003] At present, the most commonly used method for wood and bamboo anticorrosion and mildew prevention is still chemical anticorrosion and mildew prevention. Wood and bamboo anticorrosive agents mainly include four categories: oil anticorrosion and mildew prevention agents, oil-borne anticorrosion and mildew prevention agents, water-borne anticorrosion and mildew prevention agents, and gas anticorrosion and mildew prevention agents. Among them, water-borne anticorrosion and mildew prevention agents are the most widely used. However, as a water-borne wood and bamboo anticorrosion and mildew prevention agent, the active ingredients in the water-borne wood and bamboo anticorrosion and mildew prevention agent are soluble in water, so the poor anti-loss resistance of the anticorrosion and mildew prevention agent components is its main disadvantage. Therefore, solving the loss of active ingredients in water-borne wood anticorrosion and mildew prevention agents can not only improve the anticorrosion effect of anticorrosion and mildew prevention treated materials, but also reduce its impact on the environment. The anti-loss resistance of the anticorrosion and mildew prevention agent components is closely related to the degree of fixation in the treated materials. This is because the unfixed anticorrosion and mildew prevention agent components in the treated materials are still water-soluble and are easily lost to the outside world, while the substances generated by a series of chemical reactions with wood components are difficult to dissolve in water, so they have better anti-loss resistance. In the study of methods to accelerate the fixation of active ingredients in preservatives and mildew inhibitors in wood, researchers have tried to compound hydrophobic additives with preservatives and mildew inhibitors to prevent or slow down the migration of copper and thus reduce the loss of copper. However, due to technical and cost reasons, this method has not been widely used. Nowadays, most of the methods used are vacuum impregnation, pressure impregnation and vacuum-pressure impregnation to improve the permeability of preservatives and mildew inhibitors, which is not very helpful for improving their fixation properties and cannot increase the chemical bonding between chemical agents and wood components.

[0004] With the increasing maturity of wood drying technology, post-drying treatment of anti-corrosion and mildew-proof treated materials at home and abroad to improve the anti-loss property of treated materials has become the main form of anti-corrosion and mildew-proof treated materials production. At present, the commonly used post-treatment method in the production of anti-corrosion and mildew-proof treated materials in my country is air-drying post-treatment. However, although conventional air-drying post-treatment is simple, convenient and low-cost, it occupies a large area and it is difficult to achieve a good fixation effect in a short time. In addition, since the fixation process of the active ingredients in water-borne anti-corrosion and mildew-proof agents is affected by many factors, in actual applications, a reasonable fixation process should be adopted for different anti-corrosion and mildew-proof agent formulas, including the temperature, relative humidity and fixation time of the fixation environment, etc. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for anticorrosion and antimildew treatment of wood and bamboo products and anticorrosion and antimildew wood and bamboo products. The anticorrosion and antimildew treatment method avoids the problems of wood structure destruction, chemical component degradation and reduction of physical and mechanical properties caused by chemical treatment and physical treatment, improves the fixing performance of the anticorrosion and antimildew agent, and is conducive to the overall wood and bamboo material to obtain stronger anticorrosion, antimildew and high durability effects.

[0006] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0007] In one aspect, the present invention provides a method for treating wood and bamboo products against corrosion and mildew, comprising:

[0008] Vacuum impregnation of wood and bamboo products with antiseptic and antifungal agents;

[0009] The wood and bamboo products after vacuum impregnation treatment are placed in a high-voltage electrostatic field for high-voltage electric field treatment.

[0010] Furthermore, before the wood and bamboo products are vacuum impregnated with the antiseptic and mildew-proof agent, the wood and bamboo products are pretreated, including:

[0011] Sanding of wood and bamboo products with a sanding volume of 0.5~1 mm;

[0012] Carry out humidity control treatment on wood and bamboo products so that the moisture content of wood and bamboo products is 8-12%;

[0013] Balancing treatment of wood and bamboo products.

[0014] Furthermore, the vacuum impregnation treatment of the wood and bamboo products with the antiseptic and mildew inhibitor comprises:

[0015] The wood and bamboo products are placed in a vacuum impregnation device and vacuumed;

[0016] Add the antiseptic and mildew-proof agent into the vacuum impregnation device, and release the vacuum state after the antiseptic and mildew-proof agent completely immerses the wood and bamboo products;

[0017] The wood and bamboo products are removed from the vacuum impregnation device to complete the vacuum impregnation process.

[0018] Furthermore, the wood and bamboo products are placed in a vacuum impregnation device and vacuumed until the air pressure reaches -0.07 to -0.09 MPa, and the vacuum state is maintained for not less than 20 minutes;

[0019] And / or, after the vacuum state is released, the wood and bamboo products impregnated with the antiseptic and mildew inhibitor are placed in an environment with an air pressure of 0-1.5 MPa for 1-2 hours.

[0020] Furthermore, the preservative and mildew preventer is selected from one or more of an oil-borne preservative, an oil-borne mildew preventer, a water-borne preservative and a water-borne mildew preventer.

[0021] Furthermore, the mass concentration of the antiseptic and mildew inhibitor is 1-11%, and the drug loading is 1-10 kg / m 3 .

[0022] Furthermore, the vacuum impregnation treated wood and bamboo products are placed in a high voltage electrostatic field for high voltage electric field treatment, comprising:

[0023] Conductive metal plates are respectively arranged on the upper and lower sides of the wood and bamboo products after vacuum impregnation treatment, wherein the conductive metal plate on one side is connected to the negative electrode of the high-voltage electric field generator, and the conductive metal plate on the other side is connected to the positive electrode of the high-voltage electric field generator. The high-voltage electric field generator is turned on to perform high-voltage electric field treatment on the wood and bamboo products; after the treatment time is reached, the high-voltage electric field generator is turned off to complete the high-voltage electric field treatment.

[0024] Furthermore, the voltage difference between the positive and negative electrodes of the conductive metal plates is not less than 1 kV;

[0025] And / or, the distance between the conductive metal electrode plate and the wood or bamboo product is not less than 1 mm.

[0026] Furthermore, the time of the high-voltage electric field treatment is not less than 4 hours, and the temperature condition during the high-voltage electric field treatment is 25°C~90°C.

[0027] On the other hand, the present invention provides an anticorrosive and antimildew wood and bamboo product, which is obtained after being treated by the anticorrosive and antimildew treatment method for wood and bamboo products provided by the present invention.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The anticorrosion and mildew-proofing method for wood and bamboo products provided by the present invention performs vacuum impregnation treatment on the wood and bamboo products with an anticorrosion and mildew-proofing agent and then performs high-voltage electric field treatment, thereby avoiding the problems of wood structure destruction, chemical component degradation and physical and mechanical property reduction caused by chemical treatment and physical treatment, and effectively improves the fixing performance of the anticorrosion and mildew-proofing agent, which is beneficial to the overall wood and bamboo products to obtain stronger anticorrosion, mildew-proof and high durability effects.

[0030] The anti-corrosion and anti-mildew treatment method for wood and bamboo products provided by the present invention uses a vacuum impregnation followed by a high-voltage electric field curing treatment method with simple steps and low production cost, which is conducive to further industrial development, and provides a new method with low cost and excellent effect in the technical field of wood and bamboo anti-corrosion and anti-mildew treatment, and has broad commercial application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of a wood or bamboo product impregnated with a preservative provided in an embodiment of the present invention having conductive metal plates disposed on the upper and lower sides;

[0032] Figure 2 Infrared spectra at the negative electrode of the wood and bamboo products impregnated with the preservative provided by the embodiment of the present invention using high voltage electric fields with different parameters for anti-corrosion treatment;

[0033] Figure 3 Infrared spectra at the positive electrode of the wood and bamboo products impregnated with the preservative provided by the embodiment of the present invention using high voltage electric fields with different parameters for anti-corrosion treatment;

[0034] Figure 4 The leaching rate of the wood and bamboo products impregnated with the preservative provided in the embodiments of the present invention is obtained by using a high voltage electric field with different parameters for anti-corrosion treatment.

[0035] In the figure: 1. a first conductive metal plate; 2. a wood or bamboo product impregnated with a preservative; 3. a second conductive metal plate. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0037] Example 1

[0038] This embodiment provides a method for treating wood and bamboo products against corrosion and mildew, the method comprising:

[0039] (1) Sand the wood and bamboo products with a sanding amount of 0.5-1mm;

[0040] (2) Conditioning the wood and bamboo products so that the moisture content of the wood and bamboo products is 10%;

[0041] (3) Place the wood and bamboo products in a vacuum device and evacuate the vacuum to -0.07~-0.09 MPa, and maintain the vacuum state for 30 min;

[0042] (4) Add preservatives until the preservatives completely immerse the wood and bamboo products. The mass concentration of the preservatives is 5%, and the drug loading is 5 kg / m 3 ;

[0043] (5) After the vacuum state is released, the wood and bamboo products impregnated with the preservative are placed in an environment of 1.5 MPa for 1 h;

[0044] (6) The wood and bamboo products are removed from the vacuum impregnation device and placed in a high-voltage electrostatic field for post-treatment. A first conductive metal plate 1 and a second conductive metal plate 3 are respectively arranged on the upper and lower sides of the wood and bamboo products 2 impregnated with the preservative, wherein the conductive metal plate on one side is connected to the negative electrode of the high-voltage electric field generator, and the conductive metal plate on the other side is connected to the positive electrode. The voltage difference between the positive and negative electrodes is set to 20 kV, the treatment time is 6 h, and the temperature is 70°C. After the time is up, the wood and bamboo products are taken out;

[0045] (7) Place the wood and bamboo products in an oven, dry them at 50°C for 24 hours, then take them out and cool them to balance for 24 hours.

[0046] Example 2

[0047] The present embodiment provides a method for treating wood and bamboo products with corrosion resistance and mildew resistance. The difference from the first embodiment is that step (6) is changed to: the wood and bamboo products are removed from the vacuum impregnation device and placed in a high-voltage electrostatic field for post-treatment, and conductive metal plates are respectively arranged on the upper and lower sides of the wood and bamboo products impregnated with the preservative, one side of the metal plate is connected to the negative electrode of the high-voltage electric field generator, and the other side of the metal plate is connected to the positive electrode, the voltage difference between the positive and negative electrodes is set to 20 kV, the treatment time is 12 h, and the temperature is 70° C. After the time is up, the wood and bamboo products are taken out.

[0048] Example 3

[0049] The present embodiment provides a method for treating wood and bamboo products with corrosion resistance and mildew resistance. The difference from the first embodiment is that step (6) is changed to: the wood and bamboo products are removed from the vacuum impregnation device and placed in a high-voltage electrostatic field for post-treatment, and conductive metal plates are respectively arranged on the upper and lower sides of the wood and bamboo products impregnated with the preservative, one side of the metal plate is connected to the negative electrode of the high-voltage electric field generator, and the other side of the metal plate is connected to the positive electrode, the voltage difference between the positive and negative electrodes is set to 20 kV, the treatment time is 24 hours, and the temperature is 70°C. After the time is up, the wood and bamboo products are taken out.

[0050] Example 4

[0051] The present embodiment provides a method for treating wood and bamboo products with corrosion resistance and mildew resistance. The difference from the first embodiment is that step (6) is changed to: the wood and bamboo products are removed from the vacuum impregnation device and placed in a high-voltage electrostatic field for post-treatment, and conductive metal plates are respectively arranged on the upper and lower sides of the wood and bamboo products impregnated with the preservative, one side of the metal plate is connected to the negative electrode of the high-voltage electric field generator, and the other side of the metal plate is connected to the positive electrode, the voltage difference between the positive and negative electrodes is set to 40 kV, the treatment time is 6 hours, and the temperature is 70°C. After the time is up, the wood and bamboo products are taken out.

[0052] Example 5

[0053] The present embodiment provides a method for treating wood and bamboo products with corrosion resistance and mildew resistance. The difference from the first embodiment is that step (6) is changed to: the wood and bamboo products are removed from the vacuum impregnation device and placed in a high-voltage electrostatic field for post-treatment, and conductive metal plates are respectively arranged on the upper and lower sides of the wood and bamboo products impregnated with the preservative, one side of the metal plate is connected to the negative electrode of the high-voltage electric field generator, and the other side of the metal plate is connected to the positive electrode, the voltage difference between the positive and negative electrodes is set to 40 kV, the treatment time is 12 h, and the temperature is 70°C. After the time is up, the wood and bamboo products are taken out.

[0054] Example 6

[0055] The present embodiment provides a method for treating wood and bamboo products with corrosion resistance and mildew resistance. The difference from the first embodiment is that step (6) is changed to: the wood and bamboo products are removed from the vacuum impregnation device and placed in a high-voltage electrostatic field for post-treatment, and conductive metal plates are respectively arranged on the upper and lower sides of the wood and bamboo products impregnated with the preservative, one side of the metal plate is connected to the negative electrode of the high-voltage electric field generator, and the other side of the metal plate is connected to the positive electrode, the voltage difference between the positive and negative electrodes is set to 40 kV, the treatment time is 24 hours, and the temperature is 70°C. After the time is up, the wood and bamboo products are taken out.

[0056] Example 7

[0057] The present embodiment provides a method for treating wood and bamboo products with corrosion resistance and mildew resistance. The difference from the first embodiment is that step (6) is changed to: the wood and bamboo products are removed from the vacuum impregnation device and placed in a high-voltage electrostatic field for post-treatment, and conductive metal plates are respectively arranged on the upper and lower sides of the wood and bamboo products impregnated with the preservative, one side of the metal plate is connected to the negative electrode of the high-voltage electric field generator, and the other side of the metal plate is connected to the positive electrode, the voltage difference between the positive and negative electrodes is set to 60 kV, the treatment time is 6 hours, and the temperature is 70°C. After the time is up, the wood and bamboo products are taken out.

[0058] Example 8

[0059] The present embodiment provides a method for treating wood and bamboo products with corrosion resistance and mildew resistance. The difference from the first embodiment is that step (6) is changed to: the wood and bamboo products are removed from the vacuum impregnation device and placed in a high-voltage electrostatic field for post-treatment, and conductive metal plates are respectively arranged on the upper and lower sides of the wood and bamboo products impregnated with the preservative, one side of the metal plate is connected to the negative electrode of the high-voltage electric field generator, and the other side of the metal plate is connected to the positive electrode, the voltage difference between the positive and negative electrodes is set to 60 kV, the treatment time is 12 h, and the temperature is 70°C. After the time is up, the wood and bamboo products are taken out.

[0060] Example 9

[0061] The present embodiment provides a method for treating wood and bamboo products with corrosion resistance and mildew resistance. The difference from the first embodiment is that step (6) is changed to: the wood and bamboo products are removed from the vacuum impregnation device and placed in a high-voltage electrostatic field for post-treatment, and conductive metal plates are respectively arranged on the upper and lower sides of the wood and bamboo products impregnated with the preservative, one side of the metal plate is connected to the negative electrode of the high-voltage electric field generator, and the other side of the metal plate is connected to the positive electrode, the voltage difference between the positive and negative electrodes is set to 60 kV, the treatment time is 24 hours, and the temperature is 70°C. After the time is up, the wood and bamboo products are taken out.

[0062] Comparative Example 1

[0063] This comparative example provides a method for treating wood and bamboo products with corrosion and mildew resistance, which is different from Example 1 in that: in step (6), no high-voltage electric field is applied, and the wood and bamboo products are placed in a normal pressure environment at a temperature of 70° C. for 6 hours. After the time is reached, the wood and bamboo products are taken out.

[0064] The fixing performance of the preservatives for wood and bamboo products provided in Examples 1-9 and Comparative Example 1, as well as the antiseptic performance of the wood and bamboo products, were tested respectively. The test method for fixing performance was based on the American Wood Preservatives Association (AWPA El 1-97) "Standard Method for Determining Loss of Wood Preservatives", and the preservative was tested for loss:

[0065] (1) The samples were placed at a constant temperature (23 ± 0.5 °C) and humidity (50 ± 2%) for 3 weeks to adjust the moisture content of the samples;

[0066] (2) The treated samples were immersed in concentrated nitric acid and digested under microwave-assisted pressure. The preservative concentration (C0) of the treated samples was measured by atomic absorption spectrometry.

[0067] (3) Place the sample in a beaker according to the parameter type, then inject 40 ml of distilled water and place the beaker in a box with constant temperature (23 ± 0.5 °C) and humidity (50 ± 2%).

[0068] (4) Change the water every 6, 24, and 48 hours, and then every 48 hours for 14 days. Collect the extract from each beaker into the corresponding container.

[0069] (5) Loss test: The treated samples were digested in concentrated nitric acid solution under microwave-assisted pressure. The concentration (C1) was measured by atomic absorption spectrometry and the preservative loss rate (F%) was calculated according to the following formula:

[0070]

[0071] The entire test was repeated three times.

[0072] The test method for the anti-corrosion performance is as follows: the wood and bamboo products provided in Examples 1-9 and Comparative Example 1 are placed in the open air for 3 months and then their weight loss percentage is measured. The anti-corrosion grade is divided according to the weight loss percentage and the anti-corrosion effect evaluation index provided in Table 1.

[0073] Table 1

[0074] Corrosion resistance grade Corrosion resistance Weight loss percentage Ⅰ Strong corrosion resistance 0%~10% Ⅱ Corrosion resistance 11%~24% Ⅲ Slightly resistant to decay 25%~44% Ⅳ Not resistant to corrosion 45%~70% V decay ＞70%

[0075] The test results of the fixing performance and anti-corrosion performance are shown in Table 2.

[0076] Table 2

[0077] Example High voltage electric field voltage value (kV) High voltage treatment time (h) Churn rate (%) Corrosion resistance grade 1 20 6 10.7 Ⅲ 2 20 12 10.0 Ⅱ 3 20 24 8.8 Ⅱ 4 40 6 8.2 Ⅲ 5 40 12 7.8 Ⅱ 6 40 24 5.0 Ⅰ 7 60 6 6.9 Ⅱ 8 60 12 5.2 Ⅰ 9 60 24 3.3 Ⅰ Comparative Example 1 / / 11.5 Ⅲ

[0078] It can be seen from Table 2 that the loss rate of the wood and bamboo products provided in Examples 1-9 after high-voltage electric field treatment is lower than that of the wood and bamboo products provided in Comparative Example 1, especially the wood and bamboo products provided in Example 6, whose loss rate is only 5%, and the corrosion resistance levels of the wood and bamboo products provided in Examples 2, 3 and 5-9 are higher than that of Comparative Example 1. The corrosion resistance levels of Examples 1 and 4 are slightly lower and close to Comparative Example 1, mainly because the voltage value is small and the treatment time is short, and the preservatives cannot be effectively fixed inside the material.

[0079] Figure 2 Infrared spectra of the negative electrode of the wood and bamboo products impregnated with the preservative provided in the embodiment of the present invention using high voltage electric fields with different parameters for antiseptic treatment. −1 The stretching vibration of the -OH band at 2917 cm-1 was significantly reduced. This result indicates that the electric field treatment provides the possibility for copper ions to cover the bamboo surface and react strongly with hydroxyl groups in situ. −1 The peak at 1731 cm is due to the stretching vibration of the CH group. −1 and 1239cm −1 The characteristic peaks of hemicellulose and 1510 cm −1 、1425cm −1The characteristic peak of lignin decreases with the increase of treatment voltage. This shows that the increase of voltage can promote the chemical reaction between copper ions and wood. The adsorption of copper by hemicellulose and lignin makes copper occupy the position of the original functional group, resulting in the weakening of the absorption peak intensity here. The analysis shows that electric field treatment can improve the fixation performance of the antiseptic and mildew inhibitor, which is beneficial to the overall antiseptic, mildew and high durability of wood and bamboo.

[0080] Figure 3 The infrared spectra at the positive electrode of the wood and bamboo products impregnated with the preservative provided in the embodiment of the present invention are treated with high voltage electric fields with different parameters. The infrared spectrum at the positive electrode is similar to the infrared spectrum at the negative electrode. The comparison and analysis show that the peak value of the positive electrode treatment under the same voltage changes more significantly, indicating that its fixing performance is better.

[0081] Figure 4 The leaching rate of the wood and bamboo products impregnated with the preservative provided in the embodiment of the present invention using a high-voltage electric field with different parameters for anti-corrosion treatment, the leaching rate of the cross section, radial section and tangential section is based on the test method of the fixing performance, and the corresponding sample sections are sampled and dissected. With the increase of the electric field strength, the leaching rate gradually decreases, indicating that its fixing performance gradually increases. At the same time, a higher leaching rate was observed in the samples treated with the cross section, mainly because the permeability of the cross section is higher than that of the radial section and the tangential section. Analysis shows that the leaching rate after treatment is lower than that of the untreated one, indicating that this method can effectively improve the fixing performance of the preservative and provide favorable help for improving the anti-corrosion and anti-mildew performance.

[0082] Example 10

[0083] This embodiment provides a method for treating wood and bamboo products against corrosion and mildew, the method comprising:

[0084] (1) Sand the wood and bamboo products with a sanding amount of 0.5-1mm;

[0085] (2) Condition the wood and bamboo products to a moisture content of 10%;

[0086] (3) Place the wood and bamboo products in a vacuum device and evacuate the vacuum to -0.07~-0.09 MPa, and maintain the vacuum state for 30 min;

[0087] (4) Add the mildew inhibitor until the mildew inhibitor completely immerses the wood and bamboo products. The mass concentration of the mildew inhibitor is 2% and the drug loading is 3 kg / m 3 ;

[0088] (5) After releasing the vacuum state, place the wood and bamboo products impregnated with the mildew inhibitor in an environment of 1.5 MPa for 1 h;

[0089] (6) The wood and bamboo products are removed from the vacuum impregnation device and placed in a high-voltage electrostatic field for post-treatment. Conductive metal plates are placed on the upper and lower sides of the wood and bamboo products impregnated with the mildew inhibitor, one metal plate is connected to the negative electrode of the high-voltage electric field generator, and the other metal plate is connected to the positive electrode. The voltage difference between the positive and negative electrodes is set to 20 kV. The treatment time is 6 h and the temperature is 70 °C. After the time is up, the wood and bamboo products are taken out;

[0090] (7) Place the wood and bamboo products in an oven, dry them at 50°C for 24 hours, then take them out and cool them to balance for 24 hours.

[0091] Embodiment 11

[0092] The present embodiment provides a method for treating wood and bamboo products with corrosion resistance and mildew resistance. The difference from the embodiment 10 is that step (6) is changed to: the wood and bamboo products are removed from the vacuum impregnation device and placed in a high-voltage electrostatic field for post-treatment, and conductive metal plates are respectively arranged on the upper and lower sides of the wood and bamboo products impregnated with mildew inhibitors, one side of the metal plate is connected to the negative electrode of the high-voltage electric field generator, and the other side of the metal plate is connected to the positive electrode, the voltage difference between the positive and negative electrodes is set to 20 kV, the treatment time is 12 h, and the temperature is 70° C. After the time is up, the wood and bamboo products are taken out.

[0093] Example 12

[0094] The present embodiment provides a method for treating wood and bamboo products with corrosion resistance and mildew resistance. The difference from the embodiment 10 is that step (6) is changed to: the wood and bamboo products are removed from the vacuum impregnation device and placed in a high-voltage electrostatic field for post-treatment, and conductive metal plates are respectively arranged on the upper and lower sides of the wood and bamboo products impregnated with mildew inhibitors, one side of the metal plate is connected to the negative electrode of the high-voltage electric field generator, and the other side of the metal plate is connected to the positive electrode, the voltage difference between the positive and negative electrodes is set to 20 kV, the treatment time is 24 hours, and the temperature is 70°C. After the time is up, the wood and bamboo products are taken out.

[0095] Example 13

[0096] The present embodiment provides a method for treating wood and bamboo products with corrosion resistance and mildew resistance. The difference from the embodiment 10 is that step (6) is changed to: the wood and bamboo products are removed from the vacuum impregnation device and placed in a high-voltage electrostatic field for post-treatment, and conductive metal plates are respectively arranged on the upper and lower sides of the wood and bamboo products impregnated with mildew inhibitors, one side of the metal plate is connected to the negative electrode of the high-voltage electric field generator, and the other side of the metal plate is connected to the positive electrode, the voltage difference between the positive and negative electrodes is set to 40 kV, the treatment time is 6 hours, and the temperature is 70°C. After the time is up, the wood and bamboo products are taken out.

[0097] Embodiment 14

[0098] The present embodiment provides a method for treating wood and bamboo products with corrosion resistance and mildew resistance. The difference from the embodiment 10 is that step (6) is changed to: the wood and bamboo products are removed from the vacuum impregnation device and placed in a high-voltage electrostatic field for post-treatment, and conductive metal plates are respectively arranged on the upper and lower sides of the wood and bamboo products impregnated with mildew inhibitors, one side of the metal plate is connected to the negative electrode of the high-voltage electric field generator, and the other side of the metal plate is connected to the positive electrode, the voltage difference between the positive and negative electrodes is set to 40 kV, the treatment time is 12 h, and the temperature is 70° C. After the time is up, the wood and bamboo products are taken out.

[0099] Embodiment 15

[0100] The present embodiment provides a method for treating wood and bamboo products with corrosion resistance and mildew resistance. The difference from the embodiment 10 is that step (6) is changed to: the wood and bamboo products are removed from the vacuum impregnation device and placed in a high-voltage electrostatic field for post-treatment, and conductive metal plates are respectively arranged on the upper and lower sides of the wood and bamboo products impregnated with mildew inhibitors, one side of the metal plate is connected to the negative electrode of the high-voltage electric field generator, and the other side of the metal plate is connected to the positive electrode, the voltage difference between the positive and negative electrodes is set to 40 kV, the treatment time is 24 hours, and the temperature is 70°C. After the time is up, the wood and bamboo products are taken out.

[0101] Example 16

[0102] The present embodiment provides a method for treating wood and bamboo products with corrosion resistance and mildew resistance. The difference from the embodiment 10 is that step (6) is changed to: the wood and bamboo products are removed from the vacuum impregnation device and placed in a high-voltage electrostatic field for post-treatment, and conductive metal plates are respectively arranged on the upper and lower sides of the wood and bamboo products impregnated with mildew inhibitors, one side of the metal plate is connected to the negative electrode of the high-voltage electric field generator, and the other side of the metal plate is connected to the positive electrode, the voltage difference between the positive and negative electrodes is set to 60 kV, the treatment time is 6 hours, and the temperature is 70°C. After the time is up, the wood and bamboo products are taken out.

[0103] Embodiment 17

[0104] The present embodiment provides a method for treating wood and bamboo products with corrosion resistance and mildew resistance. The difference from the embodiment 10 is that step (6) is changed to: the wood and bamboo products are removed from the vacuum impregnation device and placed in a high-voltage electrostatic field for post-treatment, and conductive metal plates are respectively arranged on the upper and lower sides of the wood and bamboo products impregnated with mildew inhibitors, one side of the metal plate is connected to the negative electrode of the high-voltage electric field generator, and the other side of the metal plate is connected to the positive electrode, the voltage difference between the positive and negative electrodes is set to 60 kV, the treatment time is 12 h, and the temperature is 70° C. After the time is up, the wood and bamboo products are taken out.

[0105] Embodiment 18

[0106] The present embodiment provides a method for treating wood and bamboo products with corrosion resistance and mildew resistance. The difference from the embodiment 10 is that step (6) is changed to: the wood and bamboo products are removed from the vacuum impregnation device and placed in a high-voltage electrostatic field for post-treatment, and conductive metal plates are respectively arranged on the upper and lower sides of the wood and bamboo products impregnated with mildew inhibitors, one side of the metal plate is connected to the negative electrode of the high-voltage electric field generator, and the other side of the metal plate is connected to the positive electrode, the voltage difference between the positive and negative electrodes is set to 60 kV, the treatment time is 24 h, and the temperature is 70° C. After the time is up, the wood and bamboo products are taken out.

[0107] Comparative Example 2

[0108] This comparative example provides a method for treating wood and bamboo products with corrosion and mildew resistance, which is different from Example 10 in that: in step (6), no high-voltage electric field is applied, and the wood and bamboo products are placed in a temperature of 70° C. and normal pressure environment for 6 hours. After the time is reached, the wood and bamboo products are taken out.

[0109] The fixing performance of the preservatives for wood and bamboo products provided in Examples 10-18 and Comparative Example 2, and the anti-mildew performance of the wood and bamboo products were tested respectively, wherein the fixing performance test method was the same as the above-mentioned fixing performance test method.

[0110] The test method for the mildew resistance performance is as follows: after placing the wood and bamboo products provided by Examples 10-18 and Comparative Example 2 in the open air for 3 months, the area of ​​the infected hyphae on the surface is measured, and the mildew resistance grade is divided according to the mildew resistance effect evaluation index provided in Table 3 according to the area of ​​the infected hyphae on the surface.

[0111] Table 3

[0112] Mildew resistance level Infected hyphae area on the sample surface 0 0 1 ＜1 / 4 2 1 / 4~1 / 2 3 1 / 2~3 / 4 4 3 / 4~1 5 1

[0113] The test results of the fixing performance and anti-mildew performance are shown in Table 4.

[0114] Table 4

[0115] Example High voltage electric field voltage value (kV) High voltage treatment time (h) Churn rate (%) Mildew resistance level 10 20 6 17.2 2 11 20 12 15.4 1 12 20 24 11.0 1 13 40 6 10.2 2 14 40 12 8.5 1 15 40 24 6.3 0 16 60 6 8.1 1 17 60 12 6.2 0 18 60 24 5.4 0 Comparative Example 2 / / 18.3 2

[0116] As shown in Table 4, the loss rate of the wood and bamboo products provided by Examples 10-18 after high-voltage electric field treatment is lower than that of the wood and bamboo products provided by Comparative Example 2, and the mildew resistance level of the wood and bamboo products provided by Examples 11, 12, and 14-18 is higher than that of Comparative Example 1, among which the mildew resistance level of Examples 15, 17, and 18 is 0, proving that no infected hyphae are found on the surface, and the mildew resistance effect is particularly excellent. The mildew resistance level of Examples 10 and 13 is slightly lower and close to Comparative Example 2, mainly because the voltage value is small and the treatment time is short, and the mildew inhibitor cannot be effectively fixed inside the material.

[0117] By comparing Examples 1-9 with Comparative Example 1, and by comparing Examples 10-18 with Comparative Example 2, it can be seen that the anticorrosion and antimildew treatment method for wood and bamboo products provided by the present invention improves the problem of poor fixation performance of preservatives, and is beneficial to obtaining stronger anticorrosion, antimildew and high durability effects for the wood and bamboo materials as a whole.

[0118] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the protection of the present invention.

Claims

1. A method for treating wood and bamboo products against corrosion and mildew, characterized in that: include: Vacuum impregnation of wood and bamboo products with antiseptic and antifungal agents; The wood and bamboo products after vacuum impregnation treatment are placed in a high-voltage electrostatic field for high-voltage electric field treatment.

2. The method for anticorrosion and anti-mildew treatment of wood and bamboo products according to claim 1, characterized in that: Before the vacuum impregnation treatment of the wood and bamboo products with the antiseptic and mildew-proof agent, the wood and bamboo products are also pretreated, including: Sanding of wood and bamboo products with a sanding volume of 0.5~1 mm; Carry out humidity control treatment on wood and bamboo products so that the moisture content of wood and bamboo products is 8-12%; Balancing treatment of wood and bamboo products.

3. The method for anticorrosion and antimildew treatment of wood and bamboo products according to claim 1, characterized in that: The method of vacuum impregnating the wood and bamboo products with an antiseptic and mildew-proof agent comprises: The wood and bamboo products are placed in a vacuum impregnation device and vacuumized; Add an antiseptic and mildew preventer into the vacuum impregnation device, and release the vacuum state after the antiseptic and mildew preventer completely immerses the wood and bamboo products; The wood and bamboo products are removed from the vacuum impregnation device to complete the vacuum impregnation process.

4. The method for anticorrosion and anti-mildew treatment of wood and bamboo products according to claim 3, characterized in that: The wood and bamboo products are placed in a vacuum impregnation device and vacuumed until the air pressure reaches -0.07 to -0.09 MPa, and the vacuum state is maintained for not less than 20 minutes; And / or, after the vacuum state is released, the wood and bamboo products impregnated with the antiseptic and mildew inhibitor are placed in an environment with an air pressure of 0-1.5 MPa for 1-2 hours.

5. The method for anticorrosion and antimildew treatment of wood and bamboo products according to claim 1, characterized in that: The antiseptic and mildew preventer is selected from one or more of an oil-borne antiseptic, an oil-borne mildew preventer, a water-borne antiseptic and a water-borne mildew preventer.

6. The method for anticorrosion and anti-mildew treatment of wood and bamboo products according to claim 4, characterized in that: The mass concentration of the antiseptic and mildew-proof agent is 1-11%, and the drug loading is 1-10 kg / m 3 .

7. The method for anticorrosion and antimildew treatment of wood and bamboo products according to claim 1, characterized in that: The vacuum impregnation treated wood and bamboo products are placed in a high-voltage electrostatic field for high-voltage electric field treatment, comprising: Conductive metal plates are respectively arranged on the upper and lower sides of the wood and bamboo products after vacuum impregnation treatment, wherein the conductive metal plate on one side is connected to the negative electrode of the high-voltage electric field generator, and the conductive metal plate on the other side is connected to the positive electrode of the high-voltage electric field generator. The high-voltage electric field generator is turned on to perform high-voltage electric field treatment on the wood and bamboo products; after the treatment time is reached, the high-voltage electric field generator is turned off to complete the high-voltage electric field treatment.

8. The method for anticorrosion and anti-mildew treatment of wood and bamboo products according to claim 7, characterized in that: The voltage difference between the positive and negative electrodes of the conductive metal plates is not less than 1 kV; And / or, the distance between the conductive metal electrode plate and the wood or bamboo product is not less than 1 mm.

9. The method for anticorrosion and anti-mildew treatment of wood and bamboo products according to claim 7, characterized in that: The high-voltage electric field treatment time is not less than 4 hours, and the temperature condition during the high-voltage electric field treatment is 25°C~90°C. 10.An anticorrosive and anti-mildew wood and bamboo product, characterized by: The product is obtained by being treated by the anticorrosion and antimildew treatment method for wood and bamboo products according to any one of claims 1 to 9.

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