Preparation method and application of bamboo-wood composite heat insulation board

Abstract

The invention discloses a preparation method of a bamboo-wood composite heat insulation board, which is characterized by at least comprising the following steps: I, carrying out vacuum treatment on a bamboo-wood material, and adding a fat-soluble impregnation liquid for impregnation to obtain an impregnated bamboo-wood material; and II, the bamboo and wood materials obtained in the step I are pressurized and removed, a heat insulation material is added, forming is conducted, and the bamboo and wood composite heat insulation board is obtained. The vacuum impregnation treatment technology is combined with fat-soluble impregnation liquid to remove grease of the wood, the heat insulation capacity of the wood is greatly improved, the impregnation liquid and bamboo powder are fully impregnated by controlling the impregnation rate, bubbles between wood boards are reduced, then silicon dioxide hydrogel and shading substances are added, the heat insulation performance of the material is further optimized, and the heat insulation performance of the material is further improved. And the possibility of fire disasters is reduced.

Description

Technical Field

[0001] The present application relates to a preparation method of a bamboo-wood composite heat-insulating wood board and application thereof, belonging to the technical field of heat-insulating boards. Background Art

[0002] In modern life, furniture, objects, and wooden products account for a large proportion, especially in the kitchen, where cabinets are also made of wood. In order to prevent fires, fireproof panels need to have good wear resistance, fire resistance, and flame retardancy.

[0003] Although the existing fireproof boards have good fireproof properties, they still have many shortcomings. For example, the color and texture of the wood boards are relatively single and not as rich as natural wood, which limits their application in some scenarios. They also have poor strength and hardness, poor weighing and wear resistance, are prone to expansion and deformation, have a short service life, and are difficult to maintain.

[0004] CN118478426A discloses a method for preparing a high-performance heat-insulating wooden board. The method first saws, cuts, and screens the raw materials, and then dries them until the humidity of the raw materials is below 12%. Since the grease carried by the wood itself has not been processed / the degreasing treatment is not thorough, the heat insulation is poor. Therefore, a method for preparing a bamboo-wood composite heat-insulating wooden board is provided. Summary of the invention

[0005] To solve the above problems, the present application provides a preparation method and application of a bamboo-wood composite thermal insulation board. The present application uses vacuum impregnation technology to degrease the wood, reduce the grease on the wood surface, optimize the thermal insulation performance of the material, and reduce the possibility of fire.

[0006] According to one aspect of the present application, a method for preparing a bamboo-wood composite thermal insulation board is provided, comprising at least the following steps:

[0007] Step I: subjecting the bamboo material to vacuum treatment, adding a fat-soluble impregnation liquid for impregnation, and obtaining an impregnated bamboo material;

[0008] Step II: The bamboo-wood material obtained in step I is subjected to pressure treatment, cleaned, added with heat-insulating material, and molded to obtain a bamboo-wood composite heat-insulating wood board.

[0009] Optionally, the conditions of the vacuum treatment are as follows:

[0010] The vacuum treatment time is 0.5 to 1.5 hours;

[0011] The vacuum degree of the vacuum treatment is 0.06-0.10Mpa.

[0012] Optionally, the conditions of the vacuum treatment are as follows:

[0013] The vacuum treatment time is independently selected from any value among 0.5h, 0.6h, 0.7h, 0.8h, 0.9h, 1.0h, 1.1h, 1.2h, 1.3h, 1.4h, 1.5h or a range between any two of the above points;

[0014] Optionally, the vacuum degree of the vacuum treatment is independently selected from any value among 0.060 MPa, 0.065 MPa, 0.070 MPa, 0.075 MPa, 0.080 MPa, 0.085 MPa, 0.090 MPa, 0.100 MPa or a range value between any two of the above points.

[0015] Optionally, the fat-soluble impregnating liquid is selected from at least one of castor oil-based polyurethane resin, melamine, and urea-formaldehyde resin.

[0016] Optionally, the conditions of the impregnation are as follows:

[0017] The immersion time is 8 to 12 hours;

[0018] The vacuum degree of the impregnation is 0.06-0.10Mpa.

[0019] Optionally, the conditions of the impregnation are as follows:

[0020] The immersion time is independently selected from any value among 8.0h, 8.5h, 9.0h, 9.5h, 10.0h, 10.5h, 11.0h, 11.5h, 12h, or a range between any two of the above points;

[0021] The vacuum degree of the immersion is independently selected from any value among 0.06Mpa, 0.065Mpa, 0.070Mpa, 0.075Mpa, 0.080Mpa, 0.085Mpa, 0.090Mpa, 0.100Mpa or a range value between any two of the above points.

[0022] Optionally, the conditions of the pressure treatment are as follows:

[0023] The pressure of the pressurized treatment is 1-2 MPa;

[0024] The time of the pressure treatment is 6 to 8 hours.

[0025] Optionally, the conditions of the pressure treatment are as follows:

[0026] The pressure of the pressurized treatment is independently selected from any value of 1.0 MPa, 1.0 MPa, 1.2 MPa, 1.3 MPa, 1.4 MPa, 1.5 MPa, 1.6 MPa, 1.7 MPa, 1.8 MPa, 1.9 MPa, 2.0 MPa or a range between any two of the above points;

[0027] The time of the pressurization treatment is independently selected from any value of 6.0 h, 6.2 h, 6.4 h, 6.6 h, 6.8 h, 7.0 h, 7.2 h, 7.4 h, 7.6 h, 7.8 h, 8.0 h, or a range between any two of the above points.

[0028] Optionally, the clearing conditions are as follows:

[0029] The vacuum degree of the cleaning is 0.06-0.10Mpa;

[0030] The cleaning time is 20 to 60 minutes.

[0031] Optionally, the clearing conditions are as follows:

[0032] The vacuum degree of the cleaning is independently selected from any value among 0.06Mpa, 0.065Mpa, 0.070Mpa, 0.075Mpa, 0.080Mpa, 0.085Mpa, 0.090Mpa, 0.100Mpa or a range between any two of the above points;

[0033] The clear time is independently selected from any value of 20 min, 25 min, 30 min, 35 min, 40 min, 45 min, 50 min, 55 min, 60 min, or a range between any two of the above points.

[0034] Optionally, the thermal insulation material includes silicon dioxide, titanium dioxide, kaolin, or cyanoacrylate.

[0035] Optionally, the mass ratio of the silicon dioxide, titanium dioxide, kaolin and cyanoacrylate is 60-70:10-15:1-4:1:4.

[0036] Optionally, the molding conditions are as follows:

[0037] The molding temperature is 70-120°C;

[0038] The molding pressure is 0.06-0.10Mpa;

[0039] The molding time is 0.5 to 3 hours.

[0040] According to a second aspect of the present application, there is provided an application of a bamboo-wood composite thermal insulation wood board in building materials.

[0041] The beneficial effects of this application include:

[0042] 1) The preparation method provided by the present application discloses a vacuum impregnation treatment technology. Since the main component of bamboo and wood powder is insoluble cellulose, its surface is prone to produce grease, which makes the obtained wood board unsightly and reduces its service life. The method disclosed in the present application allows the impregnation liquid and bamboo and wood powder to be fully mixed by pressurizing. Conventional impregnation liquids have poor permeability. The impregnation liquid used in the present application has a high solubility for the lipid compounds in the bamboo and wood powder. The impregnation rate is adjusted by controlling the pressure so that the lipid compounds in the bamboo and wood are fully dissolved, thereby achieving the effect of removing the lipid compounds and effectively reducing the bubbles between the wooden boards after subsequent forming.

[0043] 2) The preparation method provided in the present application overcomes the defect of the existing impregnation technology that it is difficult to control the impregnation rate due to the different solubility of the impregnation solution.

[0044] 3) The preparation method provided in the present application further optimizes the thermal insulation performance of the material and reduces the possibility of fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a preparation flow chart used in the examples of this application. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the technical solution, the present invention is described in detail below in conjunction with embodiments. The description in this section is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention.

[0047] Example 1

[0048] Place 5g of bamboo powder in a vacuum container, evacuate to a negative pressure state, make the vacuum degree to 0.08Mpa, maintain for 1h, add 10mL of castor oil-based polyurethane resin solution, soak for 10h, pressurize to 1.5Mpa, maintain for 6h, then evacuate the vacuum container to a negative pressure state to allow the impregnation liquid to spread rapidly in the bamboo powder, then drain the remaining impregnation liquid in the container, take out the impregnated bamboo material, and dry it at 80℃ for 12h.

[0049] 3g of dried bamboo and wood material was mixed with 0.65g of silica hydrogel, 0.15g of titanium dioxide, 0.3g of kaolin and 0.3g of cyanoacrylate, and molded at a temperature of 100°C and a pressure of 0.1Mpa for 3h to obtain a bamboo-wood composite insulation board. When the temperature was 30°C, the heat flux density on the inner and outer surfaces of the board was -500W / m 2 .

[0050] Example 2

[0051] Place 5g of bamboo powder in a vacuum container, evacuate to a negative pressure state, make the vacuum degree to 0.08Mpa, maintain for 1h, add 10mL of melamine solution, soak for 10h, increase the pressure to 1.5Mpa, maintain for 6h, then evacuate the vacuum container to a negative pressure state to allow the impregnation liquid to spread rapidly in the bamboo powder, then drain the remaining impregnation liquid in the container, take out the impregnated bamboo material, and dry it at 80℃ for 12h.

[0052] 3g of dried bamboo and wood material was mixed with 0.65g of silica hydrogel, 0.15g of titanium dioxide, 0.3g of kaolin and 0.3g of cyanoacrylate, and molded at a temperature of 100°C and a pressure of 0.1Mpa for 3h to obtain a bamboo-wood composite insulation board. At a temperature of 35°C, the heat flux density on the inner and outer surfaces of the board was -480W / m 2 .

[0053] Example 3

[0054] Place 5g of bamboo powder in a vacuum container, evacuate to a negative pressure state, make the vacuum degree to 0.08Mpa, maintain for 1h, add 10mL of urea-formaldehyde resin solution, soak for 10h, pressurize to 1.5Mpa, maintain for 6h, then evacuate the vacuum container to a negative pressure state to allow the impregnation liquid to spread rapidly in the bamboo powder, then drain the remaining impregnation liquid in the container, take out the impregnated bamboo material, and dry it at 80℃ for 12h.

[0055] 3g of dried bamboo and wood material was mixed with 0.65g of silica hydrogel, 0.15g of titanium dioxide, 0.3g of kaolin and 0.3g of cyanoacrylate, and molded at a temperature of 100°C and a pressure of 0.1Mpa for 3h to obtain a bamboo-wood composite insulation board. When the temperature was 40°C, the heat flux density on the inner and outer surfaces of the board was -350W / m 2 .

[0056] Example 4

[0057] Place 5g of bamboo powder in a vacuum container, evacuate to a negative pressure state, make the vacuum degree to 0.09Mpa, maintain for 1.5h, add 10mL of melamine solution, soak for 10h, increase the pressure to 1.5Mpa, maintain for 6h, then evacuate the vacuum container to a negative pressure state to allow the impregnation liquid to spread rapidly in the bamboo powder, then drain the remaining impregnation liquid in the container, take out the impregnated bamboo material, and dry it at 80℃ for 12h.

[0058] 3g of dried bamboo and wood material was mixed with 0.60g of silica hydrogel, 0.1g of titanium dioxide, 0.1g of kaolin and 0.4g of cyanoacrylate, and molded at a temperature of 120°C and a pressure of 0.1Mpa for 1.5h to obtain a bamboo-wood composite insulation board. When the temperature was 45°C, the heat flux density on the inner and outer surfaces of the board was -300W / m 2.

[0059] Example 5

[0060] Place 5g of bamboo powder in a vacuum container, evacuate to a negative pressure state, make the vacuum degree to 0.09Mpa, maintain for 1.5h, add 10mL of urea-formaldehyde resin solution, soak for 10h, pressurize to 1.5Mpa, maintain for 6h, then evacuate the vacuum container to a negative pressure state to allow the impregnation liquid to spread rapidly in the bamboo powder, then drain the remaining impregnation liquid in the container, take out the impregnated bamboo material, and dry it at 80℃ for 12h.

[0061] 3g of dried bamboo and wood materials were mixed with 0.60g of silica hydrogel, 0.1g of titanium dioxide, 0.1g of kaolin and 0.1g of cyanoacrylate, and molded at a temperature of 110°C and a pressure of 0.1Mpa for 1.5h to obtain a bamboo-wood composite insulation board. When the temperature was 20°C, the heat flux density on the inner and outer surfaces of the board was -650W / m 2 .

[0062] Comparative Example 1

[0063] The unvacuum treated bamboo wood powder was directly mixed with 0.60g silica hydrogel, 0.1g titanium dioxide, 0.1g kaolin and 0.4g cyanoacrylate, and molded at a temperature of 120°C and a pressure of 0.1Mpa for 1.5h to obtain a bamboo-wood composite insulation board. When the temperature was 45°C, the heat flux density on the inner and outer surfaces of the board was -50W / m 2 .

[0064] It should be noted that, in this article, the terms: include, contain and any other variants are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Specific examples are used in this article to illustrate the principle and implementation of the technical solution of the present invention. The above examples are only used to help understand the method of the present invention and its core idea. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements, modifications or changes can be made, and the above technical features can also be combined in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the present invention to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A method for preparing a bamboo-wood composite thermal insulation board, characterized in that: At least the following steps are included: Step I: subjecting the bamboo material to vacuum treatment, adding a fat-soluble impregnation liquid for impregnation, and obtaining an impregnated bamboo material; Step II: The bamboo-wood material obtained in step I is subjected to pressure treatment, cleaned, added with heat-insulating material, and molded to obtain a bamboo-wood composite heat-insulating wood board.

2. The preparation method according to claim 1, characterized in that: The conditions of the vacuum treatment are as follows: The vacuum treatment time is 0.5 to 1.5 hours; The vacuum degree of the vacuum treatment is 0.06-0.10Mpa.

3. The preparation method according to claim 1, characterized in that: The fat-soluble impregnating liquid is selected from at least one of castor oil-based polyurethane resin, melamine and urea-formaldehyde resin.

4. The preparation method according to claim 1, characterized in that: The conditions of the impregnation are as follows: The immersion time is 8 to 12 hours; The vacuum degree of the impregnation is 0.06-0.10Mpa.

5. The preparation method according to claim 1, characterized in that: The conditions of the pressure treatment are as follows: The pressure of the pressurized treatment is 1-2 MPa; The time of the pressure treatment is 6 to 8 hours.

6. The preparation method according to claim 1, characterized in that: The conditions for the removal are as follows: The vacuum degree of the cleaning is 0.06-0.10Mpa; The cleaning time is 20 to 60 minutes.

7. The preparation method according to claim 1, characterized in that: The heat insulating material comprises silicon dioxide, titanium dioxide, kaolin and cyanoacrylate.

8. The preparation method according to claim 1, characterized in that: The mass ratio of silicon dioxide, titanium dioxide, kaolin and cyanoacrylate is 60-70:10-15:1-4:1:

4.

9. The preparation method according to claim 1, characterized in that: The molding conditions are as follows: The molding temperature is 70-120°C; The molding pressure is 0.06-0.10Mpa; The molding time is 0.5 to 3 hours.

10. Use of the bamboo-wood composite heat-insulating wood board prepared by any one of the preparation methods of claims 1 to 9 in building materials.

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