Preparation method of super-hydrophobic poplar wood by sand-embedding method, product and application thereof

Abstract

The application discloses a preparation method of super-hydrophobic poplar wood prepared by a sand-embedding method and products and applications of the super-hydrophobic poplar wood. The preparation method comprises the following steps: drying poplar wood after cleaning the poplar wood, preparing a 1%-3% mass fraction epoxy resin anhydrous ethanol dispersion solution, adding an epoxy resin and a curing agent of the epoxy resin, and magnetically stirring to obtain a bottom coating dispersion system; preparing a 1%-3% mass fraction epoxy resin anhydrous ethanol dispersion solution, adding an epoxy resin and a curing agent of the epoxy resin, adding polydimethylsiloxane and a curing agent of the polydimethylsiloxane, and magnetically stirring to obtain a surface coating dispersion system. The super-hydrophobic poplar wood prepared by the sand-embedding method is beneficial to promoting long-term utilization of super-hydrophobic wood indoors and outdoors and utilization of the super-hydrophobic wood in a complex high-humidity environment.

Description

Technical Field

[0001] This invention relates to the field of novel wood development and modification technology, specifically to a method for preparing superhydrophobic poplar wood using the sand-injection method, as well as the product and its application. Background Technology

[0002] Superhydrophobic surfaces possess exceptional water resistance and self-cleaning properties, thus holding broad application prospects in fields such as self-cleaning coatings, waterproofing materials, and microfluidic control. In the past, numerous methods have been proposed for preparing superhydrophobic surfaces, such as chemical modification and nanostructured surfaces. However, these methods typically require complex processes, expensive materials, and environmentally unfriendly chemical treatments, limiting their practical application. We propose a method for preparing superhydrophobic poplar wood using a sand-embedding method. Inspired by natural plant surfaces, this method employs a sand grain self-assembly strategy to achieve superhydrophobic properties on the poplar surface. The prepared poplar surface exhibits extremely high superhydrophobicity; water droplets can roll off the surface and quickly remove dirt, keeping the surface clean. This method uses renewable resources as the base material and avoids complex chemical treatments, resulting in a lower environmental impact. It can be applied to outdoor construction, furniture, and wooden crafts, providing durable water resistance, repairability, and easy-to-clean properties. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] Therefore, the purpose of this invention is to provide a method for preparing superhydrophobic poplar wood using the sand-injection method, as well as the product and application. The superhydrophobic coating prepared by this invention using the sand-injection method is beneficial to promoting the long-term use of superhydrophobic wood indoors and outdoors, as well as its use in complex high-humidity environments.

[0005] To address the aforementioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0006] A method for preparing superhydrophobic poplar wood using a sand-incorporation method, comprising:

[0007] S1. Wash and dry the poplar wood;

[0008] S2. Prepare an anhydrous ethanol dispersion of epoxy resin with a mass fraction of 1%-3%, add epoxy resin and its curing agent, and stir magnetically to obtain the bottom coating dispersion system.

[0009] S3. Prepare an anhydrous ethanol dispersion of epoxy resin with a mass fraction of 1%-3%, add epoxy resin and its curing agent, add polydimethylsiloxane and its curing agent, and obtain the topcoat dispersion system by magnetic stirring.

[0010] S4. Spray the base coat from step S2 onto the poplar wood surface, then let it stand at room temperature to allow the coating to dry.

[0011] S5. Place hydrophobic silica powder on the poplar wood surface from step S4, and sand it with sandpaper. After the poplar wood surface is evenly covered with silica powder, blow away the remaining powder.

[0012] S6. Spray the coating from step S3 onto the poplar surface from step S5, and dry it in an electric heating constant temperature drying oven to obtain superhydrophobic poplar constructed by the sand embedding method.

[0013] As a preferred embodiment of the preparation method of superhydrophobic poplar wood using the sand-injection method described in this invention, in step S1, a poplar wood sample with dimensions of 50mm*50mm*3mm is selected, ultrasonically cleaned in anhydrous ethanol and distilled water for 30 minutes respectively, and dried in an electric heating constant temperature drying oven at 120℃.

[0014] As a preferred embodiment of the preparation method for superhydrophobic poplar wood using the sand-injection method described in this invention, in step S2, an anhydrous ethanol dispersion of epoxy resin with a mass fraction of 1% is prepared, an epoxy resin curing agent is added, the ratio of epoxy resin to curing agent is 3:1, and the bottom coating dispersion system is obtained after magnetic stirring in a constant temperature heating magnetic stirrer for 5 minutes.

[0015] As a preferred embodiment of the preparation method for superhydrophobic poplar wood using the sand-injection method described in this invention, in step S3, an anhydrous ethanol dispersion of epoxy resin with a mass fraction of 1% is prepared, an epoxy resin curing agent is added, the ratio of epoxy resin to curing agent is 3:1, 0.2g of polydimethylsiloxane and its curing agent are added, the ratio of polydimethylsiloxane and its curing agent is 10:1, and the mixture is magnetically stirred in a constant temperature magnetic stirrer for 10 minutes to obtain a topcoat dispersion system.

[0016] As a preferred embodiment of the method for preparing superhydrophobic poplar wood using the sand-injection method described in this invention, the epoxy resin is epoxy resin H758 and its matching curing agent, and the ratio of the epoxy resin and its curing agent is 3:1.

[0017] As a preferred embodiment of the preparation method for superhydrophobic poplar wood using the sand-injection method described in this invention, in step S4, 2 ml of the base coating dispersion system is sprayed onto the poplar wood surface using an electric spray gun, and allowed to stand at room temperature for 5 minutes to allow the coating to dry.

[0018] As a preferred embodiment of the preparation method of superhydrophobic poplar wood using the sand-injection method described in this invention, in step S5, 0.03g of hydrophobic silica powder is placed on the surface of the poplar wood in step S4, and sand is injected clockwise with 1000-mesh sandpaper. After the poplar wood surface is evenly covered with sand-injected silica powder, the remaining powder is blown away with a rubber bulb.

[0019] As a preferred embodiment of the preparation method of superhydrophobic poplar wood using the sand-injection method described in this invention, in step S6, 2 ml of topcoat from step S3 is sprayed onto the poplar wood surface from step S5 using an electric spray gun, and dried at 60-70℃ for 3-4 hours to obtain superhydrophobic poplar wood constructed by the sand-injection method.

[0020] A superhydrophobic poplar wood is obtained by a preparation method using a sand-injection method.

[0021] Application of superhydrophobic poplar wood in furniture.

[0022] Compared with existing technologies, the advantages of this invention are as follows: This invention develops a simple and efficient method for preparing superhydrophobic poplar wood, employing a sand grain self-assembly strategy. Sand grains are incorporated into the surface to self-assemble. During this arrangement, the sand grains form tiny depressions and gaps with the base coating. Introducing a topcoat containing a low surface energy material allows water droplets to form highly spherical shapes, thus achieving a superhydrophobic effect. When the coating wears down, a new topcoat is applied, and the replenishment of low surface energy material restores the superhydrophobic properties. Through the adhesion of epoxy resin, silica provides a micro / nano-rough structure, and polydimethylsiloxane provides a certain level of low surface energy, endowing the coating with excellent waterproof, stain-resistant, and self-cleaning properties. The superhydrophobic coating prepared by this invention using the sand-incorporation method is beneficial for promoting the long-term use of superhydrophobic wood both indoors and outdoors, as well as its application in complex, high-humidity environments. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0024] Figure 1 This is a process flow diagram of the present invention.

[0025] Figure 2 This is a product photo of Embodiment 3 of the present invention.

[0026] Figure 3This is a scanning electron microscope image of the surface in Embodiment 3 of the present invention.

[0027] Figure 4 This is a contact angle image from Embodiment 3 of the present invention. Detailed Implementation

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0030] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0031] This invention provides a method for preparing superhydrophobic poplar wood using the sand-injection method, as well as the product and its application. The superhydrophobic coating prepared by this invention using the sand-injection method is beneficial for promoting the long-term use of superhydrophobic wood indoors and outdoors, as well as its use in complex high-humidity environments.

[0032] The following is combined Figure 1 The present invention provides a detailed description of a method for preparing superhydrophobic poplar wood using a sand-immersion method.

[0033] Example 1:

[0034] S1. Select a poplar wood sample (Shantou Yihua Life Technology Co., Ltd.) with dimensions of 50mm*50mm*3mm, and ultrasonically clean it in anhydrous ethanol and distilled water for 30 minutes respectively. Then dry the treated poplar wood in an electric heating constant temperature drying oven at 120℃.

[0035] S2. Prepare 20g of anhydrous ethanol dispersion of epoxy resin with a mass fraction of 1%, add epoxy resin and its curing agent (H758, Dongguan Jinyuan New Materials Co., Ltd.), the ratio of epoxy resin to curing agent is 3:1, and obtain the bottom coating dispersion system after magnetic stirring in a constant temperature heating magnetic stirrer for 5 minutes.

[0036] S3. Prepare 21g of anhydrous ethanol dispersion of epoxy resin with a mass fraction of 1%. Add epoxy resin and its curing agent. The ratio of epoxy resin to curing agent (H758, Dongguan Jinyuan New Materials Co., Ltd.) is 3:1. Add 0.2g of polydimethylsiloxane and its curing agent (Sylgard 184, Dow Corning Incorporated, USA). The ratio of polydimethylsiloxane to its curing agent is 10:1. Stir magnetically in a constant temperature heating magnetic stirrer for 10min to obtain the topcoat dispersion system.

[0037] S4. Use an electric airbrush to spray 2ml of the base coat dispersion system onto the poplar surface and let it stand at room temperature for 5 minutes to allow the coating to dry.

[0038] S5. Take 0.03g of hydrophobic silica powder (average particle size 20nm, Suzhou Youyan New Material Industry Co., Ltd.) and place it on the poplar wood surface in step S4. Use 1000-grit sandpaper to sand the surface in a clockwise direction. After the poplar wood surface is evenly covered with silica powder, blow away the remaining powder with a rubber bulb.

[0039] S6. Using an electric spray gun, spray 2 ml of topcoat from step S3 onto the poplar surface from step S5, and dry at 70°C for 3 hours to obtain superhydrophobic poplar constructed by the sand-incorporation method.

[0040] The water contact angle of the superhydrophobic wood prepared in this embodiment was tested to be 156.6°.

[0041] Example 2:

[0042] S1. Select a poplar wood sample with dimensions of 50mm*50mm*3mm, and ultrasonically clean it in anhydrous ethanol and distilled water for 30 minutes respectively. Then dry the treated poplar wood in an electric heating constant temperature drying oven at 120℃.

[0043] S2. Prepare an anhydrous ethanol dispersion of epoxy resin with a mass fraction of 1%, add epoxy resin curing agent, the ratio of epoxy resin to curing agent is 3:1, and stir magnetically for 5 minutes in a constant temperature heating magnetic stirrer to obtain the bottom coating dispersion system.

[0044] S3. Prepare an anhydrous ethanol dispersion of epoxy resin with a mass fraction of 2%, add epoxy resin curing agent, the ratio of epoxy resin to curing agent is 3:1, add 0.2g of polydimethylsiloxane and its curing agent, the ratio of polydimethylsiloxane and its curing agent is 10:1, and then magnetically stir in a constant temperature heating magnetic stirrer for 10 minutes to obtain the topcoat dispersion system.

[0045] S4. Use an electric airbrush to spray 2ml of the base coat dispersion system onto the poplar surface and let it stand at room temperature for 5 minutes to allow the coating to dry.

[0046] S5. Take 0.03g of hydrophobic silica powder and apply it to the poplar wood surface from step S4 using 1000-grit sandpaper in a clockwise direction. After the poplar wood surface is evenly covered with silica powder, blow away the remaining powder with a rubber bulb.

[0047] S6. Using an electric spray gun, spray 2 ml of topcoat from step S3 onto the poplar surface from step S5, and dry at 70°C for 3 hours to obtain superhydrophobic poplar constructed by the sand-incorporation method.

[0048] The water contact angle of the superhydrophobic wood prepared in this embodiment was tested to be 157.4°.

[0049] Example 3:

[0050] S1. Select a poplar wood sample with dimensions of 50mm*50mm*3mm, and ultrasonically clean it in anhydrous ethanol and distilled water for 30 minutes respectively. Then dry the treated poplar wood in an electric heating constant temperature drying oven at 120℃ until it is completely dry.

[0051] S2. Prepare an anhydrous ethanol dispersion of epoxy resin with a mass fraction of 1.5%, add epoxy resin curing agent, the ratio of epoxy resin to curing agent is 3:1, and stir magnetically for 5 minutes in a constant temperature heating magnetic stirrer to obtain the bottom coating dispersion system.

[0052] S3. Prepare an anhydrous ethanol dispersion of epoxy resin with a mass fraction of 1.5%, add epoxy resin curing agent, the ratio of epoxy resin to curing agent is 3:1, add 0.3g of polydimethylsiloxane and its curing agent, the ratio of polydimethylsiloxane and its curing agent is 10:1, and then magnetically stir in a constant temperature heating magnetic stirrer for 10 minutes to obtain the topcoat dispersion system.

[0053] S4. Use an electric airbrush to spray 2ml of the base coat dispersion system onto the poplar surface and let it stand at room temperature for 5 minutes to allow the coating to dry.

[0054] S5. Take 0.03g of hydrophobic silica powder and place it on the poplar wood surface from step S4. Use 1000-grit sandpaper to sand the surface in a clockwise direction. After the poplar wood surface is evenly covered with silica powder, blow away the remaining powder with a rubber bulb.

[0055] S6. Using an electric spray gun, spray 2 ml of topcoat from step S3 onto the poplar surface from step S5, and dry at 70°C for 3 hours to obtain superhydrophobic poplar constructed by the sand-incorporation method.

[0056] like Figure 2 The image shown is a photograph of the product obtained in this embodiment. Figure 3 For the product, the surface scanning electron microscope images are tested, such as... Figure 4 As shown, the water contact angle of the superhydrophobic wood prepared in this embodiment is 160.4°.

[0057] Example 4:

[0058] S1. Select a poplar wood sample with dimensions of 50mm*50mm*3mm, and ultrasonically clean it in anhydrous ethanol and distilled water for 30 minutes respectively. Then dry the treated poplar wood in an electric heating constant temperature drying oven at 120℃ until it is completely dry.

[0059] S2. Prepare an anhydrous ethanol dispersion of epoxy resin with a mass fraction of 1.5%, add epoxy resin curing agent, the ratio of epoxy resin to curing agent is 3:1, and stir magnetically for 5 minutes in a constant temperature heating magnetic stirrer to obtain the bottom coating dispersion system.

[0060] S3. Prepare an anhydrous ethanol dispersion of epoxy resin with a mass fraction of 3%, add epoxy resin curing agent, the ratio of epoxy resin to curing agent is 3:1, add 0.3g of polydimethylsiloxane and its curing agent, the ratio of polydimethylsiloxane and its curing agent is 10:1, and then magnetically stir in a constant temperature heating magnetic stirrer for 10 minutes to obtain the topcoat dispersion system.

[0061] S4. Use an electric airbrush to spray 2ml of the base coat dispersion system onto the poplar surface and let it stand at room temperature for 5 minutes to allow the coating to dry.

[0062] S5. Take 0.03g of hydrophobic silica powder and place it on the poplar wood surface from step S4. Use 1000-grit sandpaper to sand the surface in a clockwise direction. After the poplar wood surface is evenly covered with silica powder, blow away the remaining powder with a rubber bulb.

[0063] S6. Using an electric spray gun, spray 2 ml of topcoat from step S3 onto the poplar surface from step S5, and dry at 70°C for 3 hours to obtain superhydrophobic poplar constructed by the sand-incorporation method.

[0064] The water contact angle of the superhydrophobic wood prepared in this embodiment was tested to be 158.6°.

[0065] Example 5:

[0066] S1. Select a poplar wood sample with dimensions of 50mm*50mm*3mm, and ultrasonically clean it in anhydrous ethanol and distilled water for 30 minutes respectively. Then dry the treated poplar wood in an electric heating constant temperature drying oven at 120℃ until it is completely dry.

[0067] S2. Prepare an anhydrous ethanol dispersion of epoxy resin with a mass fraction of 2%, add epoxy resin curing agent, the ratio of epoxy resin to curing agent is 3:1, and stir magnetically for 5 minutes in a constant temperature heating magnetic stirrer to obtain the bottom coating dispersion system.

[0068] S3. Prepare an anhydrous ethanol dispersion of epoxy resin with a mass fraction of 1%, add epoxy resin curing agent, the ratio of epoxy resin to curing agent is 3:1, add 0.3g of polydimethylsiloxane and its curing agent, the ratio of polydimethylsiloxane and its curing agent is 10:1, and then magnetically stir in a constant temperature heating magnetic stirrer for 10 minutes to obtain the topcoat dispersion system.

[0069] S4. Use an electric airbrush to spray 2ml of the base coat dispersion system onto the poplar surface and let it stand at room temperature for 5 minutes to allow the coating to dry.

[0070] S5. Take 0.03g of hydrophobic silica powder and place it on the poplar wood surface from step S4. Use 1000-grit sandpaper to sand the surface in a clockwise direction. After the poplar wood surface is evenly covered with silica powder, blow away the remaining powder with a rubber bulb.

[0071] S6. Using an electric spray gun, spray 2 ml of topcoat from step S3 onto the poplar surface from step S5, and dry at 70°C for 3 hours to obtain superhydrophobic poplar constructed by the sand-incorporation method.

[0072] The water contact angle of the superhydrophobic wood prepared in this embodiment was tested to be 156.2°.

[0073] Example 6:

[0074] S1. Select a poplar wood sample with dimensions of 50mm*50mm*3mm, and ultrasonically clean it in anhydrous ethanol and distilled water for 30 minutes respectively. Then dry the treated poplar wood in an electric heating constant temperature drying oven at 120℃ until it is completely dry.

[0075] S2. Prepare an anhydrous ethanol dispersion of epoxy resin with a mass fraction of 3%, add epoxy resin curing agent, the ratio of epoxy resin to curing agent is 3:1, and stir magnetically for 5 minutes in a constant temperature heating magnetic stirrer to obtain the bottom coating dispersion system.

[0076] S3. Prepare an anhydrous ethanol dispersion of epoxy resin with a mass fraction of 1.5%, add epoxy resin curing agent, the ratio of epoxy resin to curing agent is 3:1, add 0.3g of polydimethylsiloxane and its curing agent, the ratio of polydimethylsiloxane and its curing agent is 10:1, and then magnetically stir in a constant temperature heating magnetic stirrer for 10 minutes to obtain the topcoat dispersion system.

[0077] S4. Use an electric airbrush to spray 2ml of the base coat dispersion system onto the poplar surface and let it stand at room temperature for 5 minutes to allow the coating to dry.

[0078] S5. Take 0.03g of hydrophobic silica powder and place it on the poplar wood surface from step S4. Use 1000-grit sandpaper to sand the surface in a clockwise direction. After the poplar wood surface is evenly covered with silica powder, blow away the remaining powder with a rubber bulb.

[0079] S6. Using an electric spray gun, spray 2 ml of topcoat from step S3 onto the poplar surface from step S5, and dry at 70°C for 3 hours to obtain superhydrophobic poplar constructed by the sand-incorporation method.

[0080] The water contact angle of the superhydrophobic wood prepared in this embodiment was tested to be 152.1°.

[0081] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A method for preparing superhydrophobic poplar wood using a sand-incorporation method, characterized in that, include: S1. Wash and dry the poplar wood; S2. Prepare an anhydrous ethanol dispersion of epoxy resin with a mass fraction of 1%-3%, add epoxy resin and its curing agent, and obtain the bottom coating dispersion system by magnetic stirring. S3. Prepare an anhydrous ethanol dispersion of epoxy resin with a mass fraction of 1%-3%, add epoxy resin and its curing agent, add polydimethylsiloxane and its curing agent, and obtain the topcoat dispersion system by magnetic stirring. S4. Spray the base coat from step S2 onto the poplar wood surface, then let it stand at room temperature to allow the coating to dry. S5. Place hydrophobic silica powder on the poplar wood surface from step S4, and sand it with sandpaper. After the poplar wood surface is evenly covered with silica powder, blow away the remaining powder. S6. Spray the coating from step S3 onto the poplar surface from step S5, and dry it in an electric heating constant temperature drying oven to obtain superhydrophobic poplar constructed by the sand embedding method. In step S2, an anhydrous ethanol dispersion of epoxy resin with a mass fraction of 1% is prepared, epoxy resin curing agent is added, the ratio of epoxy resin to curing agent is 3:1, and the mixture is magnetically stirred in a constant temperature heating magnetic stirrer for 5 minutes to obtain the bottom coating dispersion system. In step S3, an anhydrous ethanol dispersion of epoxy resin with a mass fraction of 1% is prepared, epoxy resin curing agent is added, the ratio of epoxy resin to curing agent is 3:1, 0.2g of polydimethylsiloxane and its curing agent are added, the ratio of polydimethylsiloxane and its curing agent is 10:1, and the surface coating dispersion system is obtained after magnetic stirring in a constant temperature heating magnetic stirrer for 10 minutes. In step S5, 0.03 g of hydrophobic silica powder is placed on the poplar wood surface from step S4, and sanded with 1000-grit sandpaper in a clockwise direction. After the poplar wood surface is evenly covered with silica powder, the remaining powder is blown away with a rubber bulb.

2. The method for preparing superhydrophobic poplar wood using the sand-immersion method according to claim 1, characterized in that, In step S1, a poplar wood sample with dimensions of 50mm*50mm*3mm is selected, ultrasonically cleaned in anhydrous ethanol and distilled water for 30 minutes respectively, and dried in an electric heating constant temperature drying oven at 120℃.

3. The method for preparing superhydrophobic poplar wood using the sand-immersion method according to claim 1, characterized in that, The epoxy resin is epoxy resin H758 and its matching curing agent, and the ratio of the epoxy resin and its curing agent is 3:

1.

4. The method for preparing superhydrophobic poplar wood using the sand-immersion method according to claim 1, characterized in that, In step S4, 2 ml of the base coat dispersion system is sprayed onto the poplar wood surface using an electric spray gun, and left to stand at room temperature for 5 minutes to allow the coating to dry.

5. The method for preparing superhydrophobic poplar wood using the sand-immersion method according to claim 1, characterized in that, In step S6, 2 ml of topcoat from step S3 is sprayed onto the poplar surface from step S5 using an electric spray gun, and dried at 60-70℃ for 3-4 hours to obtain superhydrophobic poplar constructed by the sand-incorporation method.

6. A superhydrophobic poplar wood, characterized in that, The superhydrophobic poplar wood is prepared by any one of claims 1-5 using the sand-injection method.

7. The application of superhydrophobic poplar wood in furniture according to claim 6.

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