Bio-based thermosetting material with low dielectric constant and corrosion resistance as well as preparation method and application of bio-based thermosetting material
By preparing a bio-based thermosetting material that combines a benzoxazine-containing magnolol derivative and a silicone crosslinking network to form a dual crosslinking network, the problem of non-renewable and incomplete performance integration of bio-based material raw materials is solved, and the application of bio-based thermosetting materials with low dielectric constant and anticorrosion properties is realized.
Patent Information
- Application Number
- CN202510388111.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2025-08-19
AI Technical Summary
In the prior art, the raw material sources of bio-based materials are non-renewable and the performance integration is incomplete, making it difficult to meet the needs of electronic equipment for low dielectric constant and anti-corrosion performance.
Magnolia derivatives containing benzooxazine are prepared by reactions of renewable resources Magnolia, paraformaldehyde and furamylamine, and trimethoxysilane is introduced through thiol-ene click chemical reaction to form a bio-based thermoset precursor with a dual crosslinking functional group, and finally obtain a low dielectric constant and anti-corrosion bio-based thermoset material of the dual crosslinking network through dual curing.
It realizes high-performance bio-based thermosetting materials with low dielectric constant and corrosion resistance, suitable for packaging and copper foil protection of electronic equipment, especially in marine communication environments with excellent corrosion resistance.
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Abstract
Description
Technical Field
[0001] The present invention belongs to the field of bio-based new materials, and in particular relates to a bio-based thermosetting material with a low dielectric constant and corrosion resistance, and a preparation method and application thereof. Background Art
[0002] In today's rapidly advancing science and technology, the development of environmentally friendly and efficient new materials has become a key research direction in materials science. With the increasing depletion of fossil resources and the intensification of environmental pollution, the use of renewable resources to replace petroleum-based chemicals has become a global consensus. However, bio-based starting materials with simple chemical structures are rare. Most bio-based materials have highly complex structures, requiring complex chemical or biological conversion to ready-to-use monomers. As humanity's understanding of nature continues to deepen, a number of simple and unique biomass materials have been discovered, such as eugenol, anethole, vanillin, resveratrol, and magnolol. Due to the presence of aromatic groups, these materials can impart excellent properties to polymers, such as low dielectric properties, good thermal stability, and low water absorption. Among them, magnolol is a natural plant product primarily derived from the bark and leaves of magnolia and magnolia officinalis. Magnolia officinalis possesses both phenolic hydroxyl groups and double bonds, making it suitable for modification and application in sustainable polymer materials.
[0003] In the electronics industry, low-dielectric constant materials are crucial for improving the performance of electronic devices. Currently, the dielectric constant of materials is reduced by introducing low-polarizability or bulky groups, resulting in better signal transmission performance in high-frequency electronic devices (Chen Xiaoling, Wang Jingyi, Wang Zhiwen, et al. Preparation and Performance Study of Low-Dielectric Fluorinated Polysulfide Imides [J]. Insulation Materials, 2024, 57(10): 78-83.). This low dielectric constant not only improves the operating efficiency of electronic devices, but also helps reduce energy consumption and heat generation, extending the service life of the equipment.
[0004] Furthermore, with the increasing frequency of maritime activities, maritime communications are gaining increasing public attention. Marine communications electronics must adapt to the ship's communication environment and support multi-service transmission. Due to the marine climate, the corrosion resistance of the packaging materials used in these electronic devices is a concern.
[0005] Therefore, in order to meet the needs of the industry, it is urgent to develop a sustainable material with low dielectric constant and corrosion resistance. Summary of the Invention
[0006] To overcome the shortcomings of existing technologies such as non-renewable raw material sources and incomplete performance integration, the primary purpose of the present invention is to provide a method for preparing a bio-based thermosetting material with a low dielectric constant and corrosion resistance. The method involves reacting renewable resources such as magnolol, paraformaldehyde, and furfural to obtain a magnolol derivative containing benzoxazine; then, trimethoxysilane is introduced through a thiol-ene click chemistry reaction to obtain a bio-based thermosetting precursor with dual cross-linking functional groups; and finally, a low dielectric constant and corrosion-resistant bio-based thermosetting material with a dual cross-linking network is obtained through dual curing.
[0007] Another object of the present invention is to provide a low dielectric constant and corrosion-resistant bio-based thermosetting material prepared by the above preparation method.
[0008] Another object of the present invention is to provide applications of the aforementioned low dielectric constant and corrosion-resistant bio-based thermosetting material.
[0009] The purpose of the present invention is achieved through the following technical solutions:
[0010] A method for preparing a bio-based thermosetting material having a low dielectric constant and being corrosion-resistant comprises the following steps:
[0011] (1) Under a nitrogen atmosphere, magnolol, paraformaldehyde, and a monoamine monomer from a renewable resource are dissolved in a solvent and stirred at 70°C-90°C until completely dissolved; the temperature is then raised to 95°C-115°C for reaction, and after the reaction, impurities and the solvent are removed to obtain a bio-based magnolol derivative containing a benzoxazine structure;
[0012] (2) dissolving the bio-based magnolol derivative obtained in step (1), γ-mercaptopropyltrimethoxysilane, and a catalyst in a solvent, heating to 50° C.-70° C., reacting for 8-10 hours, and removing the solvent to obtain a bio-based thermosetting precursor having a dual cross-linking functional group;
[0013] (3) dissolving the bio-based thermosetting precursor and catalyst obtained in step (2) in a solvent, heating and curing the mixture, and obtaining a bio-based thermosetting material having a low dielectric constant and being corrosion-resistant.
[0014] The solvent in step (1) is any one or two of ethanol, toluene and ethyl acetate; the monoamine monomer is a biomass derivative monoamine, specifically furfural or dehydroabietamine.
[0015] The stirring time in step (1) is 0.5-2 hours; the reaction time is 8-12 hours; and the molar ratio of the renewable resource magnolol, paraformaldehyde and monoamine monomer is 1:(4-4.5):(2-2.3).
[0016] The solvent in step (2) is any one or two of tetrahydrofuran, toluene, acetone and chloroform; and the catalyst is at least one of azobisisobutyronitrile and dibenzoyl peroxide.
[0017] The mass ratio of the bio-based magnolol derivative to γ-mercaptopropyltrimethoxysilane in step (2) is 1:(0.57-0.8.6), and the amount of the catalyst is 2% of the total mass of the bio-based magnolol derivative and γ-mercaptopropyltrimethoxysilane.
[0018] The amount of the catalyst in step (3) is 0.1-0.3% of the mass of the bio-based thermosetting precursor, preferably 0.1%; the catalyst is dibutyltin dilaurate; and the solvent is any one or two of N-methylpyrrolidone, dimethyl sulfoxide and dimethylformamide.
[0019] The specific operation of the curing in step (3) is: first, volatilize the solvent at 60-80°C for 6h-12h, then cure at 90-110°C for 0.5-2h, then cure at 130-150°C for 1-3h, then cure at 170-190°C for 1-3h, and finally cure at 220-240°C for 0.5-1h.
[0020] Preferably, the specific operation of the curing is: first slowly volatilize the solvent at 80°C for 10 hours, then cure at 100°C for 1 hour, then cure at 140°C for 2 hours, then cure at 180°C for 2 hours, and finally cure at 230°C for 0.5 hour.
[0021] A bio-based thermosetting material with low dielectric constant and corrosion resistance prepared by the above preparation method.
[0022] The above-mentioned low dielectric constant and corrosion-resistant bio-based thermosetting materials are used in the fields of electronic packaging and copper foil protection and corrosion protection, especially in electronic equipment with corrosion protection requirements in marine communications.
[0023] Compared with the prior art, the present invention has the following advantages and beneficial effects:
[0024] (1) The present invention uses magnolol, a renewable resource, as a raw material and introduces different groups using hydroxyl and allyl groups to prepare a high-performance polymer material; this polymer material is environmentally friendly and sustainable, and can reduce the dependence of modern industry on petroleum fossil raw materials.
[0025] (2) The bio-based magnolol derivative curing precursor obtained in the present invention has a double cross-linking functional group, and forms a highly double cross-linked network after thermal curing; this double cross-linked network structure combines the excellent properties of benzoxazine and silicone, giving the composite material unique properties, such as low dielectric constant and corrosion resistance.
[0026] (3) This invention proposes for the first time the use of a fully bio-based benzoxazine (magnolia officinalis derivative) and a silicone cross-linked network to prepare a new type of bio-based thermosetting material with a double cross-linked network; this method effectively utilizes renewable resources to convert them into sustainable high-performance polymers, which not only increases the added value of natural products, but also significantly improves the comprehensive performance of the materials; this method of converting renewable resources into sustainable polymers provides a new reference for the high-value utilization of biomass resources and the research and development of alternatives to petrochemical raw materials. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 Schematic diagram of the synthesis route of the bio-based thermosetting precursor, wherein (a) is a schematic diagram of the synthesis route of Example 5, (b) is a schematic diagram of the synthesis route of Comparative Example 1, and (c) is a schematic diagram of the synthesis route of Comparative Example 2.
[0028] Figure 2 The following are the NMR spectra of the intermediate compound and product of Example 3, wherein (a) is the NMR spectrum of M-Fa and (b) is the NMR spectrum of M-Fa-Si.
[0029] Figure 3 These are the NMR spectra of the intermediate compounds and products in the comparative examples, where (a) is the NMR spectrum of EM in comparative example 1, (b) is the NMR spectrum of EM-Si in comparative example 1, and (c) is the NMR spectrum of DP-Fa in comparative example 2. DETAILED DESCRIPTION
[0030] The present invention will be described in further detail below with reference to the examples and accompanying drawings, but the embodiments of the present invention are not limited thereto. The raw materials involved in the present invention can be purchased directly from the market, and the process parameters not specifically noted can be carried out with reference to conventional techniques.
[0031] Example 1:
[0032] (1) Under nitrogen atmosphere, 2.66 g magnolol, 1.2 g paraformaldehyde and 1.96 g furfural were dissolved in 50 mL ethyl acetate and stirred at 70 °C until dissolved; then the temperature was raised to 95 °C for 10 h. After the reaction, the mixture was dissolved in chloroform, washed three times with 1 mol / L NaOH solution, and then washed with deionized water until neutral; after dehydration with anhydrous sodium sulfate, the solvent was removed by rotary evaporation, and the yellow crystal bio-based magnolol benzoxazine was obtained by recrystallization in anhydrous ethanol, named M-Fa-1.
[0033] (2) 5 g of M-Fa-1 obtained in step (1), 3.61 g of γ-mercaptopropyltrimethoxysilane and 0.1722 g of azobisisobutyronitrile were dissolved in tetrahydrofuran and reacted at 60° C. for 10 hours; after removing the solvent by rotary evaporation, a bio-based thermosetting precursor M-Fa-Si-1 with dual cross-linking functional groups was obtained.
[0034] (3) The bio-based thermosetting precursor M-Fa-Si-1 obtained in step (2) is dissolved in dimethyl sulfoxide, and a catalyst dibutyltin dilaurate accounting for 0.1% of the mass of the bio-based thermosetting precursor is added and stirred evenly; the solvent is evaporated at 70°C for 10 hours; and then the material is cured in sequence according to the procedures of curing at 100°C for 1 hour, curing at 140°C for 2 hours, curing at 180°C for 2 hours, and curing at 230°C for 0.5 hour, to finally obtain a bio-based thermosetting material P1 (M-Fa-Si) with a double cross-linked network.
[0035] Example 2:
[0036] (1) Under nitrogen atmosphere, 2.66 g magnolol, 1.2 g paraformaldehyde and 1.96 g furfural were dissolved in 50 mL toluene and stirred at 90 °C until dissolved; then the temperature was raised to 110 °C for 10 h. After the reaction, the mixture was dissolved in chloroform, washed three times with 1 mol / L NaOH solution, and then washed with deionized water until neutral; after dehydration with anhydrous sodium sulfate, the solvent was removed by rotary evaporation, and the yellow crystal bio-based magnolol benzoxazine was obtained by recrystallization in anhydrous ethanol, named M-Fa-2.
[0037] (2) 5 g of M-Fa-2 obtained in step (1), 3.61 g of γ-mercaptopropyltrimethoxysilane and 0.1722 g of azobisisobutyronitrile were dissolved in tetrahydrofuran and reacted at 60° C. for 10 hours; after removing the solvent by rotary evaporation, a bio-based thermosetting precursor M-Fa-Si-2 having a double cross-linking functional group was obtained.
[0038] (3) The bio-based thermosetting precursor M-Fa-Si-2 obtained in step (2) is dissolved in dimethyl sulfoxide, and a catalyst dibutyltin dilaurate accounting for 0.1% of the mass of the bio-based thermosetting precursor is added and stirred evenly; the solvent is evaporated at 70°C for 10 hours; and then the material is cured in sequence according to the procedures of curing at 100°C for 1 hour, curing at 140°C for 2 hours, curing at 180°C for 2 hours, and curing at 230°C for 0.5 hour, to finally obtain a bio-based thermosetting material P2 (M-Fa-Si) with a double cross-linked network.
[0039] Example 3:
[0040] (1) Under nitrogen atmosphere, 2.66g magnolol, 1.2g paraformaldehyde and 1.96g furfural were dissolved in 50mL ethanol / toluene (V:V=1:2) mixed solvent and stirred at 80℃ until dissolved; then the temperature was raised to 110℃ for reaction for 10h. After the reaction, the mixture was dissolved in chloroform and washed three times with 1mol / L NaOH solution, and then washed with deionized water until neutral; after dehydration with anhydrous sodium sulfate, the solvent was removed by rotary evaporation and recrystallized in anhydrous ethanol to obtain yellow crystals of bio-based magnolol benzoxazine, named M-Fa. The structure of M-Fa was characterized by nuclear magnetic spectroscopy. The chemical shifts corresponding to each hydrogen atom are shown in Figure 2. Figure 2 As shown in (a).
[0041] (2) 5g of M-Fa obtained in step (1), 3.61g of γ-mercaptopropyltrimethoxysilane and 0.1722g of azobisisobutyronitrile were dissolved in tetrahydrofuran and reacted at 60°C for 10 hours; after removing the solvent by rotary evaporation, a bio-based thermosetting precursor M-Fa-Si with dual cross-linking functional groups was obtained. The structure of M-Fa-Si was characterized by H NMR spectroscopy. The chemical shifts corresponding to the hydrogen atoms are shown in Figure 2. Figure 2 As shown in (b).
[0042] (3) The bio-based thermosetting precursor obtained in step (2) was dissolved in dimethyl sulfoxide, and 0.1% of the mass of the bio-based thermosetting precursor as a catalyst dibutyltin dilaurate was added and stirred evenly; the solvent was evaporated at 70°C for 10 hours; and then cured according to the procedure of curing at 100°C for 1 hour, 140°C for 2 hours, 180°C for 2 hours, and 230°C for 0.5 hour, to finally obtain a bio-based thermosetting material P with a double cross-linked network. a (M-Fa-Si).
[0043] Example 4:
[0044] (1) Under nitrogen atmosphere, 2.66 g magnolol, 1.2 g paraformaldehyde and 1.96 g furfural were dissolved in 50 mL ethanol / toluene (V:V=1:2) mixed solvent and stirred at 80 °C until dissolved; then the temperature was raised to 110 °C for 10 h. After the reaction, the mixture was dissolved in chloroform, washed three times with 1 mol / L NaOH solution, and then washed with deionized water until neutral; after dehydration with anhydrous sodium sulfate, the solvent was removed by rotary evaporation, and the yellow crystal bio-based magnolol benzoxazine was obtained by recrystallization in anhydrous ethanol, named M-Fa.
[0045] (2) 5 g of M-Fa obtained in step (1), 3.61 g of γ-mercaptopropyltrimethoxysilane and 0.1722 g of azobisisobutyronitrile were dissolved in tetrahydrofuran and reacted at 60° C. for 10 hours; after removing the solvent by rotary evaporation, a bio-based thermosetting precursor M-Fa-Si having a double cross-linking functional group was obtained.
[0046] (3) The bio-based thermosetting precursor obtained in step (3) was dissolved in dimethylformamide, and 0.1% of the mass of the bio-based thermosetting precursor as a catalyst dibutyltin dilaurate was added and stirred evenly; the solvent was evaporated at 70°C for 10 hours; and then cured according to the procedure of curing at 100°C for 1 hour, 140°C for 2 hours, 180°C for 2 hours, and 230°C for 0.5 hour, to finally obtain a bio-based thermosetting material P with a double cross-linked network. b (M-Fa-Si).
[0047] Example 5:
[0048] (1) Under nitrogen atmosphere, 2.66 g magnolol, 1.2 g paraformaldehyde and 1.96 g furfural were dissolved in 50 mL ethanol / toluene (V:V=1:2) mixed solvent and stirred at 80 °C until dissolved; then the temperature was raised to 110 °C for 10 h. After the reaction, the mixture was dissolved in chloroform, washed three times with 1 mol / L NaOH solution, and then washed with deionized water until neutral; after dehydration with anhydrous sodium sulfate, the solvent was removed by rotary evaporation, and the yellow crystal bio-based magnolol benzoxazine was obtained by recrystallization in anhydrous ethanol, named M-Fa.
[0049] (2) 5g of M-Fa obtained in step (1), 3.61g of γ-mercaptopropyltrimethoxysilane and 0.1722g of azobisisobutyronitrile were dissolved in tetrahydrofuran and reacted at 60°C for 10 hours; after removing the solvent by rotary evaporation, a bio-based thermosetting precursor M-Fa-Si with dual cross-linking functional groups was obtained. The schematic diagram of the synthetic route is shown in FIG. Figure 1 As shown in (a).
[0050] (3) The bio-based thermosetting precursor obtained in step (2) is dissolved in N-methylpyrrolidone, and a catalyst dibutyltin dilaurate accounting for 0.1% of the mass of the bio-based thermosetting precursor is added and stirred evenly; the solvent is evaporated at 80°C for 10 hours, and then cured according to the procedure of curing at 100°C for 1 hour, curing at 140°C for 2 hours, curing at 180°C for 2 hours, and curing at 230°C for 0.5 hour, finally obtaining a bio-based thermosetting material P(M-Fa-Si) with a double cross-linked network.
[0051] Comparative Example 1:
[0052] (1) Under nitrogen atmosphere, 2.66 g of magnolol and 2.02 g of triethylamine were dissolved in 20 mL of tetrahydrofuran, and 1.57 g of acetyl chloride was slowly added dropwise to the mixed solution at 0°C. The mixture was then reacted at room temperature for 8 hours, filtered, and evaporated to obtain esterified magnolol EM. The structure of EM was characterized by H NMR spectroscopy. The chemical shifts corresponding to the hydrogen atoms are shown in Figure 2. Figure 3 As shown in (a).
[0053] (2) 3 g of EM obtained in step (1), 3.36 g of γ-mercaptopropyltrimethoxysilane, and 0.1272 g of azobisisobutyronitrile were dissolved in tetrahydrofuran; the temperature was raised to 60°C and the reaction was carried out for 10 h to obtain a magnolol derivative EM-Si having only alkoxysilane. The structure of EM-Si was characterized by H NMR spectroscopy. The chemical shifts corresponding to the hydrogen atoms are shown in FIG. Figure 3 The schematic diagram of the synthetic route is shown in (b). Figure 1 As shown in (b).
[0054] (3) The EM-Si obtained in step (2) is mixed with a catalyst dibutyltin dilaurate accounting for 0.1% of the mass of the EM-Si, and cured according to a curing procedure of 80° C. for 1 hour, 110° C. for 1 hour, and 140° C. for 0.5 hour to obtain a bio-based thermosetting material P(EM-Si) having only a silicone cross-linked network.
[0055] Comparative Example 2:
[0056] (1) Under nitrogen atmosphere, 1.86g 2,2'-biphenol, 1.2g paraformaldehyde and 1.96g furfural were dissolved in 50mL ethanol / toluene (V:V=1:2) mixed solvent and stirred at 80℃ until dissolved; then the temperature was raised to 110℃ for 10h. After the reaction, the mixture was dissolved in chloroform and washed three times with 1mol / L NaOH solution and then washed with deionized water until neutral; after dehydration with anhydrous sodium sulfate, the solvent was removed by rotary evaporation and recrystallized in anhydrous ethanol to obtain light yellow crystalline biphenylbenzoxazine, named DP-Fa. The schematic diagram of the synthesis route is shown in the figure. Figure 1 The structure of DP-Fa was characterized by H NMR spectroscopy, and the chemical shifts corresponding to each hydrogen atom are shown in Figure (c). Figure 3 As shown in (c).
[0057] (2) The DP-Fa obtained in step (1) was dissolved in N-methylpyrrolidone, the solvent was evaporated at 80°C for 10 hours, and then cured according to the procedure of curing at 100°C for 1 hour, 140°C for 2 hours, 180°C for 2 hours, and 230°C for 0.5 hours, finally obtaining a biphenyl thermosetting material P(DP-Fa) having only a benzoxazine cross-linked network.
[0058] The dielectric and anti-corrosion properties of the products prepared in Comparative Examples 1, 2 and Example 5 were characterized. The characterization methods and results are shown below:
[0059] 1. Dielectric properties
[0060] The dielectric constant and dielectric loss of the samples were measured at room temperature using an Agilent E4991A impedance analyzer. The results are shown in Table 1.
[0061] Table 1 Dielectric constant and dielectric loss of samples
[0062]
[0063] 2. Anti-corrosion performance
[0064] The Tafel curve of the sample was measured using the three-electrode mode of the electrochemical workstation, and the intensity of the sample corrosion current and the copper foil protection efficiency were calculated. The results are shown in Table 2.
[0065] Table 2 Intensity of sample corrosion current and copper foil protection efficiency
[0066]
[0067] Although Example 5 is indeed inferior to Comparative Example 1 in terms of dielectric performance alone, Example 5 is the best in terms of comprehensive dielectric and anti-corrosion performance, and the dielectric performance of Example 5 also falls within the category of low dielectric materials in the industry.
[0068] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.
Claims
1. A method for preparing a bio-based thermosetting material with low dielectric constant and corrosion resistance, characterized in that The following steps are included: (1) Under a nitrogen atmosphere, magnolol, paraformaldehyde, and a monoamine monomer from a renewable resource are dissolved in a solvent and stirred at 70°C-90°C until completely dissolved; the temperature is then raised to 95°C-115°C for reaction, and after the reaction, impurities and the solvent are removed to obtain a bio-based magnolol derivative containing a benzoxazine structure; (2) dissolving the bio-based magnolol derivative obtained in step (1), γ-mercaptopropyltrimethoxysilane, and a catalyst in a solvent, heating to 50° C.-70° C., reacting for 8-10 hours, and removing the solvent to obtain a bio-based thermosetting precursor having a dual cross-linking functional group; (3) dissolving the bio-based thermosetting precursor and catalyst obtained in step (2) in a solvent, heating and curing the mixture, and obtaining a bio-based thermosetting material having a low dielectric constant and being corrosion-resistant.
2. The method for preparing a bio-based thermosetting material having a low dielectric constant and being corrosion-resistant according to claim 1, wherein: The solvent in step (1) is any one or two of ethanol, toluene and ethyl acetate; and the monoamine monomer is furfural or dehydroabietamine.
3. The method for preparing a bio-based thermosetting material having a low dielectric constant and being corrosion-resistant according to claim 1, wherein: The stirring time in step (1) is 0.5-2 hours; the reaction time is 8-12 hours; and the molar ratio of the renewable resource magnolol, paraformaldehyde and monoamine monomer is 1:(4-4.5):(2-2.3).
4. The method for preparing a bio-based thermosetting material having a low dielectric constant and being corrosion-resistant according to claim 1, wherein: The solvent in step (2) is any one or two of tetrahydrofuran, toluene, acetone and chloroform; and the catalyst is at least one of azobisisobutyronitrile and dibenzoyl peroxide.
5. The method for preparing a bio-based thermosetting material having a low dielectric constant and being corrosion-resistant according to claim 1, wherein: The mass ratio of the bio-based magnolol derivative to γ-mercaptopropyltrimethoxysilane in step (2) is 1:(0.57-0.8.6), and the amount of the catalyst is 2% of the total mass of the bio-based magnolol derivative and γ-mercaptopropyltrimethoxysilane.
6. The method for preparing a bio-based thermosetting material having a low dielectric constant and being corrosion-resistant according to claim 1, wherein: The amount of the catalyst in step (3) is 0.1-0.3% of the mass of the bio-based thermosetting precursor; the catalyst is dibutyltin dilaurate; and the solvent is any one or two of N-methylpyrrolidone, dimethyl sulfoxide and dimethylformamide.
7. The method for preparing a bio-based thermosetting material having a low dielectric constant and being corrosion-resistant according to claim 1, wherein: The specific operation of the curing in step (3) is: first, volatilize the solvent at 60-80°C for 6h-12h, then cure at 90-110°C for 0.5-2h, then cure at 130-150°C for 1-3h, then cure at 170-190°C for 1-3h, and finally cure at 220-240°C for 0.5-1h.
8. The method for preparing a bio-based thermosetting material having a low dielectric constant and being corrosion-resistant according to claim 7, wherein: The specific operation of the curing is: first, slowly volatilize the solvent at 80°C for 10 hours, then cure at 100°C for 1 hour, then cure at 140°C for 2 hours, then cure at 180°C for 2 hours, and finally cure at 230°C for 0.5 hours.
9. A bio-based thermosetting material with low dielectric constant and corrosion resistance prepared by the preparation method according to any one of claims 1 to 8.
10. Use of the low dielectric constant and corrosion-resistant bio-based thermosetting material according to claim 9 in the fields of electronic packaging and copper foil protection and corrosion prevention.