Modifier and application thereof
By using modifiers of furfurol and other components in recombinant bamboo materials to form interpenetrating network polymers, the existing anti-mold modifiers reduce the bonding strength and heat treatment damage the structure, achieving better anti-mold, anti-corrosion and Termite resistance and improve mechanical properties.
Patent Information
- Application Number
- CN202411148672.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2024-12-17
AI Technical Summary
The existing anti-mold modifiers will reduce the glue strength during the preparation of recombinant bamboo materials, and heat treatment and other methods may damage the bamboo bundle structure, resulting in the unsatisfactory anti-mold and anti-corrosion properties of recombinant bamboo materials and affect the mechanical properties.
Modifiers including furfuryl alcohol, catalyst, stabilizer, toughening functional monomer and crosslinking agent are used to form interpenetrating network polymers through impregnation and curing and drying treatment, thereby enhancing the anti-mold, anti-corrosion, and anti-blue transformation of recombinant bamboo materials. Termite resistance while maintaining or improving mechanical properties.
It effectively improves the durability and mechanical properties of recombinant bamboo materials, avoids the negative impact of anti-mold treatment on material properties, significantly improves anti-mold, anti-corrosion and anti-termite properties, while maintaining or improving mechanical properties.
Smart Images
Figure CN119141654A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of modifiers, and specifically to a modifier suitable for performing mildew and corrosion resistance modification on reconstituted bamboo bundles. The present application also relates to the application of the modifier. Background Art
[0002] Reconstructed bamboo material is a bamboo composite material, which has the advantages of high bamboo utilization rate, excellent physical and mechanical properties, high production efficiency, and high product added value, and is widely used in plank roads, bridges, building materials, decoration, furniture and other fields. However, bamboo contains rich nutrients, and even if more adhesives are used in the preparation process of reconstructed bamboo material, it still has problems such as easy mildew and discoloration.
[0003] To this end, the prior art uses a method of performing mildew-proof treatment on bamboo bundles to overcome the above problems. The mildew-proof treatment methods include but are not limited to soaking the bamboo bundles in a modifier, adding the modifier to an adhesive, and heat-treating the bamboo bundles.
[0004] For example, the technical solution recorded in the Chinese invention patent application with publication number CN110303563A and titled “A recombinant bamboo with antibacterial and mildew-proof properties and its manufacturing method” uses water-soluble mildew-proof agent AEM5700-O-30 to impregnate bamboo bundles, and then implements sizing and pressing. For another example, the technical solution recorded in the invention patent application with publication number CN107584622A and titled “A recombinant bamboo with mildew-proof function and its preparation method” uses mildew-proof agent to impregnate bamboo bundles, and then implements sizing and pressing, wherein the main agent of mildew-proof agent includes tebuconazole, propiconazole, 5-chloro-2-methyl-4-isothiazoline-3-one, 1,2-benzisothiazolin-3-one and cypermethrin. For another example, the technical solution recorded in the invention patent application with publication number CN105690512A and titled “A method for producing high-temperature heat-treated bamboo bundles” places the bamboo bundles in a treatment tank, rapidly raises the temperature in the tank to 120-150°C and maintains it for 30 minutes, and simultaneously performs ammonia treatment. When the moisture content of the bamboo bundles drops below 5%, the temperature in the treatment tank is raised to 180-210°C at a rate of 2-4°C / min. After reaching the target temperature, the temperature is maintained for 2-4 hours, and then the ammonia treatment is performed again.
[0005] However, those skilled in the art know that the use of some mildew-proof modifiers will reduce the bonding strength of the prepared reconstructed bamboo material. The hot pressing temperature of the pressing process for preparing the reconstructed bamboo material is generally around 130°C, but during the insulation stage, the temperature of the core layer of the board can reach 160~170°C. The high temperature environment can cause the aforementioned mildew-proof modifier to fail, so the mildew-proof and anti-corrosion properties of the prepared reconstructed bamboo material are not ideal. Heat treatment, ammonia water and other treatments will cause the structure of the bamboo bundle to be destroyed, thereby affecting the mechanical properties of the reconstructed bamboo material prepared using the modified bamboo bundle. Summary of the invention
[0006] The present application provides a modifier, which can form an interpenetrating network polymer inside the recombinant bamboo material during the hot pressing process of the recombinant bamboo material by adding furfuryl alcohol resin and toughening monomer, so that the recombinant bamboo has the properties of mildew resistance, corrosion resistance, blue discoloration resistance and termite resistance, and improves the durability of the recombinant bamboo material. At the same time, the influence of mildew resistance modification treatment on the mechanical properties of the material is avoided, and the mechanical properties of the prepared recombinant bamboo material are even slightly higher than those of the recombinant bamboo material prepared with untreated bamboo bundles as raw materials.
[0007] In one aspect of the present application, a modifier is provided, comprising 30-55% by mass of furfuryl alcohol, 1.5-3.5% by mass of a catalyst, 2-5% by mass of a stabilizer, 5-12% by mass of a toughening functional monomer, and 3-6% by mass of a cross-linking agent, with the remainder being water; the toughening functional monomer is selected from one or more of hydroxyethyl methacrylate, polyvinyl alcohol, polyhydroxyethyl methacrylate, and cardanol glycidyl ether.
[0008] Preferably, the catalyst is selected from a combination of one or more of maleic anhydride, citric acid, oxalic acid and acrylic acid, the stabilizer is borax, and the crosslinking agent is selected from N-hydroxymethyl acrylamide or glutaraldehyde.
[0009] Preferably, the modifier is prepared by first dissolving the catalyst and the stabilizer in water, then adding the furfuryl alcohol, and finally adding the toughening functional monomer and the crosslinking agent, and stirring for at least 10 minutes.
[0010] In another aspect of the present application, a use of a modifier is provided, wherein a bamboo bundle is impregnated with the modifier to obtain a modified bamboo bundle, and then a curing and drying process is performed.
[0011] Preferably, the impregnation treatment is atmospheric pressure impregnation, and the impregnation time is not less than 48 hours; or The impregnation treatment is pressurized impregnation, the impregnation pressure is 1.2-1.5 MPa, and the pressure holding time is 15-60 min; or The impregnation treatment is vacuum pressure impregnation, which is first evacuated to -0.08MPa and maintained for 15 minutes, then the modifier is introduced, and then the pressure is increased to 1.2MPa and maintained for 15 to 60 minutes, and finally the pressure is released to complete the impregnation.
[0012] Preferably, before the immersion treatment, the moisture content of the bamboo bundle is 5-15%.
[0013] Preferably, the curing and drying treatment is to first drain the excess modifier in the modified bamboo bundle, then cure it in a temperature environment of 105-115°C for 3-5h, and finally dry the modified bamboo bundle in a temperature environment of 60-80°C.
[0014] Preferably, the curing and drying treatment is to first drain the excess modifier in the modified bamboo bundle, then seal and wrap the modified bamboo bundle, and cure it in a temperature environment of 105-115°C for 3-5h, and finally open the package and dry the modified bamboo bundle in a temperature environment of 60-80°C.
[0015] Preferably, the moisture content of the modified bamboo bundle after the curing and drying treatment is 5-15%.
[0016] Preferably, the modified bamboo bundle after the curing and drying treatment is subjected to a resin dipping treatment and a hot pressing molding treatment to prepare a reconstituted bamboo; wherein the adhesive used in the resin dipping treatment is a phenolic resin adhesive with a solid content of 16-20%, and the amount of the resin dipping is 10-20% of the absolute dry mass of the bamboo bundle. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative labor.
[0018] Figure 1 This is a photo of the reconstituted bamboo board numbered 5 provided in the examples of the present application.
[0019] Figure 2 This is a photo of the reconstituted bamboo board that has not been modified.
[0020] Figure 3 This is a photo of the reconstituted bamboo board No. 5 provided in the example of the present application after undergoing a mildew resistance experiment.
[0021] Figure 4 These are photos of unmodified reconstructed bamboo boards after anti-mildew testing.
[0022] Figure 5 (a) Figure 5 (b) are photos of the reconstructed bamboo board No. 5 provided in the examples of the present application after being infected by Aspergillus niger and Penicillium citrinum for 4 weeks; Figure 5 (c) Figure 5 (d) are photos of the unmodified reconstructed bamboo board infected by Aspergillus niger and Penicillium citrinum for 4 weeks.
[0023] Figure 6 This is an electron microscope image of the cross section of the reconstituted bamboo board numbered 5 provided in the example of the present application.
[0024] Figure 7 This is an electron microscope image of the cross section of the reconstituted bamboo board that has not been modified. DETAILED DESCRIPTION
[0025] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application. Example
[0026] A modifier includes 30g of furfuryl alcohol, 1.5g of a catalyst, 2g of a stabilizer, 5g of a toughening functional monomer, 3g of a crosslinking agent, and 58.5g of water, wherein the toughening functional monomer is hydroxyethyl methacrylate; the catalyst is obtained by compounding citric acid and oxalic acid, and the mass ratio of citric acid to oxalic acid is 1:2; the stabilizer is borax; and the crosslinking agent is N-hydroxymethyl acrylamide. Example
[0027] A modifier includes 35g of furfuryl alcohol, 2g of a catalyst, 2.5g of a stabilizer, 6g of a toughening functional monomer, 3.5g of a crosslinking agent, and 51g of water. The toughening functional monomer is hydroxyethyl methacrylate; the catalyst is obtained by compounding citric acid and oxalic acid, and the mass ratio of citric acid to oxalic acid is 1:2; the stabilizer is borax; and the crosslinking agent is N-hydroxymethyl acrylamide. Example
[0028] A modifier includes 40g of furfuryl alcohol, 2.5g of a catalyst, 3g of a stabilizer, 7g of a toughening functional monomer, 4g of a crosslinking agent, and 43.5g of water. The toughening functional monomer is hydroxyethyl methacrylate; the catalyst is obtained by compounding citric acid and oxalic acid, and the mass ratio of citric acid to oxalic acid is 1:2; the stabilizer is borax; and the crosslinking agent is N-hydroxymethyl acrylamide. Example
[0029] A modifier includes 45g of furfuryl alcohol, 3g of a catalyst, 3.5g of a stabilizer, 8g of a toughening functional monomer, 4.5g of a crosslinking agent, and 36g of water. The toughening functional monomer is hydroxyethyl methacrylate; the catalyst is obtained by compounding citric acid and oxalic acid, and the mass ratio of citric acid to oxalic acid is 1:2; the stabilizer is borax; and the crosslinking agent is N-hydroxymethyl acrylamide. Example
[0030] A modifier includes 50g of furfuryl alcohol, 3g of a catalyst, 4g of a stabilizer, 10g of a toughening functional monomer, 5g of a crosslinking agent, and 28g of water. The toughening functional monomer is hydroxyethyl methacrylate; the catalyst is obtained by compounding citric acid and oxalic acid, and the mass ratio of citric acid to oxalic acid is 1:2; the stabilizer is borax; and the crosslinking agent is N-hydroxymethyl acrylamide. Example
[0031] A modifier includes 55g of furfuryl alcohol, 3.5g of a catalyst, 4.5g of a stabilizer, 12g of a toughening functional monomer, 5.5g of a crosslinking agent, and 19.5g of water. The toughening functional monomer is hydroxyethyl methacrylate; the catalyst is obtained by compounding citric acid and oxalic acid, and the mass ratio of citric acid to oxalic acid is 1:2; the stabilizer is borax; and the crosslinking agent is N-hydroxymethyl acrylamide. Example
[0032] A modifier includes 50g of furfuryl alcohol, 3g of a catalyst, 4g of a stabilizer, 10g of a toughening functional monomer, 5g of a crosslinking agent, and 28g of water, wherein the toughening functional monomer is polyvinyl alcohol, the catalyst is citric acid, the stabilizer is borax, and the crosslinking agent is N-hydroxymethyl acrylamide. Example
[0033] A modifier includes 50g of furfuryl alcohol, 3g of a catalyst, 4g of a stabilizer, 10g of a toughening functional monomer, 5g of a crosslinking agent, and 28g of water, wherein the toughening functional monomer is polyhydroxyethyl methacrylate, the catalyst is oxalic acid, the stabilizer is borax, and the crosslinking agent is N-hydroxymethyl acrylamide. Example
[0034] A modifier includes 50g of furfuryl alcohol, 3g of a catalyst, 4g of a stabilizer, 10g of a toughening functional monomer, 5g of a crosslinking agent, and 28g of water, wherein the toughening functional monomer is cardanol glycidyl ether, the catalyst is maleic anhydride, the stabilizer is borax, and the crosslinking agent is N-hydroxymethyl acrylamide.
[0035] Embodiment 10: A modifier includes 50g of furfuryl alcohol, 3g of a catalyst, 4g of a stabilizer, 10g of a toughening functional monomer, 5g of a crosslinking agent, and 28g of water. The toughening functional monomer is a compound of polyvinyl alcohol and cardanol glycidyl ether, and the mass ratio of polyvinyl alcohol to cardanol glycidyl ether is 2:1; the catalyst is a compound of maleic anhydride and acrylic acid, and the mass ratio of maleic anhydride to acrylic acid is 3:1; the stabilizer is borax, and the crosslinking agent is glutaraldehyde.
[0036] The modifiers in Examples 1 to 10 were prepared by the following method: firstly, the catalyst and the stabilizer were dissolved in water, then furfuryl alcohol was added and stirred evenly, and finally, the toughening functional monomer and the crosslinking agent were added and stirred for 15 minutes.
[0037] Embodiment 11: An application of a modifier comprises the following steps: Step 1: impregnation treatment. The impregnation treatment is carried out under vacuum-pressure conditions. The bamboo bundle is placed in a vacuum impregnation tank, first evacuated to -0.08 MPa and maintained for 15 minutes, then the liquid inlet valve is opened to suck the aforementioned modifier into the vacuum impregnation tank, and then pressurized to 1.2 MPa and maintained for 40 minutes. Finally, the pressure is released to complete the impregnation, and the excess modifier is taken out and drained to obtain a modified bamboo bundle; Step 2: Curing and drying treatment: the modified bamboo bundle is sealed with aluminum foil (high temperature resistant plastic or sealed box is also acceptable), and placed in a temperature environment of 110±2°C (such as an oven) for curing. After 4 hours, the package is opened, and the temperature of the oven is lowered to 70°C to continue drying the modified bamboo bundle, until the moisture content of the modified bamboo bundle is 5-15%; Step 3: Glue dipping treatment: take a phenolic resin adhesive with a solid content of 52%, dilute it to a solid content of 18% before use, and the amount of glue dipping is 15% of the absolute dry weight of the bamboo bundle. Dry the moisture content of the modified bamboo bundle after dipping to 8-14% by means of drying, and then lay 7 layers in parallel layer by layer; Step 4: Curing and molding: Press at 130°C to obtain a density of 1.10±0.1g / m 3 Reconstructed bamboo board.
[0038] The modifiers used were the modifiers described in Examples 1 to 10, and the corresponding reconstituted bamboo boards were marked as 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10, respectively. Figure 1 A photograph of a reconstituted bamboo board numbered 5 is shown in FIG.
[0039] Embodiment 12: A modifier includes 50g of furfuryl alcohol, 3g of a catalyst, 4g of a stabilizer, 10g of a toughening functional monomer, 5g of a crosslinking agent, and 28g of water. The toughening functional monomer is hydroxyethyl methacrylate; the catalyst is obtained by compounding citric acid and oxalic acid, and the mass ratio of citric acid to oxalic acid is 1:2; the stabilizer is borax; and the crosslinking agent is N-hydroxymethyl acrylamide.
[0040] The application of this modifier comprises the following steps: Step 1: immersion treatment: immerse the bamboo bundle with a moisture content of 5-15% in the above-mentioned modifier under normal pressure, take it out after 48 hours and drain the excess modifier to obtain a modified bamboo bundle; Step 2: curing and drying, curing the modified bamboo bundle in a temperature environment of 110±2°C (such as an oven) for 4 hours, and finally drying the modified bamboo bundle in a temperature environment of 70°C until the moisture content of the modified bamboo bundle is 5-15%; Step 3: Glue dipping treatment, the adhesive used is phenolic resin adhesive, the solid content is 18%, the dipping amount is 15% of the absolute dry weight of the bamboo bundle, the moisture content of the modified bamboo bundle after dipping is dried to 8-14% by means of drying, and then 7 layers are laid in parallel layer by layer; Step 4: Curing and molding: Press at 130°C to obtain a density of 1.10±0.1g / m 3 The reconstituted bamboo board is recorded as 11.
[0041] Embodiment 13: A modifier includes 50g of furfuryl alcohol, 3g of a catalyst, 4g of a stabilizer, 10g of a toughening functional monomer, 5g of a crosslinking agent, and 28g of water. The toughening functional monomer is hydroxyethyl methacrylate; the catalyst is obtained by compounding citric acid and oxalic acid, and the mass ratio of citric acid to oxalic acid is 1:2; the stabilizer is borax; and the crosslinking agent is N-hydroxymethyl acrylamide.
[0042] The application of this modifier comprises the following steps: Step 1: impregnation treatment, the impregnation treatment is carried out under pressure, the impregnation pressure is 1.3 MPa, the pressure holding time is 40 minutes, and then the excess modifier is taken out and drained to obtain a modified bamboo bundle; Step 2: Curing and drying treatment: the modified bamboo bundle is sealed with aluminum foil (high temperature resistant plastic or sealed box is also acceptable), and placed in a temperature environment of 110±2°C (such as an oven) for curing. After 4 hours, the package is opened, and the temperature of the oven is lowered to 70°C to continue drying the modified bamboo bundle, until the moisture content of the modified bamboo bundle is 5-15%; Step 3: Glue dipping treatment, the adhesive used is phenolic resin adhesive, the solid content is 18%, the dipping amount is 15% of the absolute dry weight of the bamboo bundle, the moisture content of the modified bamboo bundle after dipping is dried to 8-14% by means of drying, and then 7 layers are laid in parallel layer by layer; Step 4: Curing and molding: Press at 130°C to obtain a density of 1.10±0.1g / m 3 The reconstituted bamboo board is recorded as 12.
[0043] Comparative Example 1: The modifier used is the modifier described in the invention patent application with publication number CN107584622A, entitled "A reconstituted bamboo with mildew-proof function and its preparation method", and the reconstituted bamboo board is prepared by the application method described in Example 11. The reconstituted bamboo board prepared in this comparative example is marked as A.
[0044] Comparative Example 2: The bamboo bundle was heat treated at a temperature of 200° C. and a treatment time of 4 hours, and then a reconstituted bamboo board was prepared using the application method described in Example 11. The reconstituted bamboo board prepared in this comparative example is denoted as B.
[0045] Comparative Example 3: The difference from Example 11 is that the modifier used only includes furfuryl alcohol, a catalyst, and a stabilizer, and the balance is water. The reconstituted bamboo board prepared in this comparative example is denoted as C.
[0046] Comparative Example 4: The difference from Example 11 is that the modifier used only includes furfuryl alcohol, a catalyst, a stabilizer, and a toughening functional monomer, and the balance is water. The reconstituted bamboo board prepared in this comparative example is denoted as D.
[0047] Comparative Example 5: A mildew-proof modified adhesive was used, the mildew-proof modified adhesive comprising 10 g of furfuryl alcohol, 0.5 g of a catalyst (the catalyst used a mass ratio of citric acid and oxalic acid of 1:2), 65 g of a phenolic resin adhesive, and 25.5 g of a curing agent (the curing agent used a polyetheramine), and then the application method described in Example 11 was used to prepare a reconstructed bamboo board. The reconstructed bamboo board prepared in this comparative example is recorded as E.
[0048] Comparative Example 6: A mildew-proof modified adhesive was used, which included 10 g of furfuryl alcohol, 0.5 g of a catalyst (the catalyst used a mass ratio of citric acid and oxalic acid of 1:2), 65 g of an epoxy resin adhesive, and 25.5 g of a curing agent (the curing agent used a polyetheramine), and then the application method described in Example 11 was used to prepare a reconstructed bamboo board. The reconstructed bamboo board prepared in this comparative example is denoted as F. Comparative Example 7: The untreated bamboo bundle was used to prepare a reconstituted bamboo board using the method of Example 11. The reconstituted bamboo board prepared in this comparative example is denoted as G. Figure 2 A photograph of the reconstituted bamboo board of Comparative Example 7 is shown in FIG.
[0049] The relevant properties of the reconstituted bamboo board prepared by the methods in the embodiments and comparative examples were tested, and the test results are as follows.
[0050] Table 1
[0051] Among them, Trichoderma viride Pers.ex Fr; Penicillam citrinum Thom; Aspergillus niger V. Tiegh; Botryodiplodia theobromae Pat; White rot fungi: Trametes versicolor; Brown rot fungi: Gloeophyllum trabeum.
[0052] It can be seen from Table 1 that, using the same pressing process conditions, the various performance indicators of the reconstructed bamboo boards numbered 1 to 10 are better than those of the reconstructed bamboo boards prepared by the anti-mildew modification treatment method in the prior art, which indicates that the modifier of the technical solution of the present application has relatively good anti-mildew, corrosion resistance, and anti-termite effects. At the same time, the addition of the modifier does not have a negative impact on the mechanical properties (static bending strength) and bonding properties (horizontal shear strength) of the prepared reconstructed bamboo boards.
[0053] Figure 3 and Figure 4 The photos of the reconstructed bamboo board No. 5 and the reconstructed bamboo board of comparative example 7 after antiseptic testing are compared. Figure 5 The photographs of the reconstructed bamboo board No. 5 and the reconstructed bamboo board of comparative example 7 after being infected by Aspergillus niger and Penicillium citrinum for 4 weeks were compared. Figure 6 and Figure 7 The electron microscope images of the cross sections of the reconstructed bamboo board No. 5 and the reconstructed bamboo board of Comparative Example 7 were compared. Figure 6 and Figure 7 It can be seen that the thin-walled cells in the bamboo bundles are filled with resin, so that they can be compressed more tightly, and reconstructed bamboo boards with higher mechanical strength can be obtained.
[0054] When the proportions of the components are the same, hydroxyethyl methacrylate is the preferred toughening functional monomer.
[0055] The present invention also conducts an experimental analysis on the influence of different impregnation treatment and curing and drying treatment parameters on the results. The experimental data are recorded in Table 2.
[0056] Table 2
[0057] Among them, Trichoderma viride Pers.ex Fr; Penicillam citrinum Thom; Aspergillus niger V. Tiegh; Botryodiplodia theobromae Pat; White rot fungi: Trametes versicolor; Brown rot fungi: Gloeophyllum trabeum.
[0058] It can be seen from Table 2 that when using the modifier of the same formula, different application methods will affect the use effect of the modifier to a large extent. Obviously, vacuum-pressure impregnation treatment followed by wet curing and drying treatment can give full play to the modification effect of the modifier provided in the embodiment of the present application, and obtain a reconstructed bamboo board with good mildew resistance, corrosion resistance, and termite resistance, and with high mechanical strength and bonding strength.
[0059] The above description is intended to be illustrative and not limiting. Upon reading the above description, many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art. Therefore, the scope of the present teachings should not be determined with reference to the above description, but should be determined with reference to the appended claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to be a waiver of the subject matter, nor should it be considered that the applicant has not considered the subject matter to be part of the disclosed application subject matter.
Claims
1. A modifier, characterized in that: The invention comprises 30-55% by weight of furfuryl alcohol, 1.5-3.5% by weight of a catalyst, 2-5% by weight of a stabilizer, 5-12% by weight of a toughening functional monomer, and 3-6% by weight of a cross-linking agent, and the balance is water; the toughening functional monomer is selected from one or more of hydroxyethyl methacrylate, polyvinyl alcohol, polyhydroxyethyl methacrylate, and cardanol glycidyl ether.
2. The modifier according to claim 1, characterized in that The catalyst is selected from a combination of one or more of maleic anhydride, citric acid, oxalic acid and acrylic acid, the stabilizer is borax, and the crosslinking agent is selected from N-hydroxymethyl acrylamide or glutaraldehyde.
3. The modifier according to claim 1, characterized in that The preparation method of the modifier is: firstly dissolving the catalyst and the stabilizer in water, then adding the furfuryl alcohol, and finally adding the toughening functional monomer and the crosslinking agent, and stirring for at least 10 minutes.
4. The use of a modifier as claimed in claim 1, characterized in that: The bamboo bundle is impregnated with the modifying agent to obtain a modified bamboo bundle, and then subjected to a curing and drying process.
5. The use of the modifier according to claim 4, characterized in that: The impregnation treatment is normal pressure impregnation, and the impregnation time is not less than 48 hours; or The impregnation treatment is pressurized impregnation, the impregnation pressure is 1.2-1.5 MPa, and the pressure holding time is 15-60 min; or The impregnation treatment is vacuum pressure impregnation, which is first evacuated to -0.08MPa and maintained for 15 minutes, then the modifier is introduced, and then the pressure is increased to 1.2MPa and maintained for 15 to 60 minutes, and finally the pressure is released to complete the impregnation.
6. The use of the modifier according to claim 4, characterized in that: Before the immersion treatment, the moisture content of the bamboo bundle is set to 5-15%.
7. The use of the modifier according to claim 4, characterized in that: The curing and drying treatment is to first drain the excess modifier in the modified bamboo bundle, then cure it in a temperature environment of 105-115° C. for 3-5 hours, and finally dry the modified bamboo bundle in a temperature environment of 60-80° C.
8. The use of the modifier according to claim 4, characterized in that: The curing and drying treatment is to first drain the excess modifier in the modified bamboo bundle, then seal and wrap the modified bamboo bundle, and cure it in a temperature environment of 105-115°C for 3-5h, and finally open the package and dry the modified bamboo bundle in a temperature environment of 60-80°C.
9. The use of the modifier according to claim 4, characterized in that: The moisture content of the modified bamboo bundle after the curing and drying treatment is 5-15%.
10. The use of the modifier according to claim 4, characterized in that: The modified bamboo bundle after the curing and drying treatment is subjected to a dipping treatment and a curing and molding treatment to prepare a reconstituted bamboo; wherein the adhesive used in the dipping treatment is a phenolic resin adhesive with a solid content of 16-20%, and the dipping amount is 10-20% of the absolute dry mass of the bamboo bundle.