Continuous network reinforced polycarbonate-based porous composite flame retardant material and method of making

Abstract

The application relates to the technical field of high polymer materials, in particular to a continuous network reinforced polycarbonate-based porous composite flame-retardant material and a preparation method thereof, which comprises the following steps: dissolving polycarbonate and flame-retardant fillers in an organic solvent to obtain a polycarbonate liquid; adding a non-solvent into the polycarbonate liquid and uniformly mixing to obtain a mixed liquid; pouring the mixed liquid into a continuous network structure, performing phase separation at a temperature of-10 DEG C to 10 DEG C, replacing the solvent to soak the obtained solid material, and obtaining the continuous network reinforced polycarbonate-based porous composite flame-retardant material. The material can prevent the flame-retardant fillers from settling in the solution, has good flame-retardant efficiency, material mechanical properties and combustion anti-dripping, and the process is simple, safe, environmentally friendly and low in cost.

Description

Technical Field

[0001] This invention relates to the field of polymer materials technology, specifically to a continuous network reinforced polycarbonate-based porous composite flame retardant material and its preparation method. Background Technology

[0002] Polymer-based porous composite materials are lightweight, sound-insulating, and heat-insulating, and are widely used in aerospace, rail transportation, and architectural decoration. Polycarbonate is a thermoplastic engineering polymer with excellent mechanical properties, good heat resistance, and corrosion resistance. Therefore, polycarbonate-based porous composite materials have unique properties and broad application prospects.

[0003] Solution phase separation is an effective method for preparing polymer-based porous composites. However, the microstructure of the resulting porous materials is usually a particle packing structure. This unique porous structure leads to high brittleness and severe surface pulverization, limiting their application range. In the field of composite materials, the introduction of continuous network structures is an effective means of reinforcement, such as carbon fiber reinforced resin matrix composites. Therefore, introducing a three-dimensional continuous network structure as a reinforcing phase into polycarbonate porous composites can yield a novel structural material with excellent comprehensive mechanical properties, thereby broadening the research and application fields of polycarbonate porous composites.

[0004] Typically, adding flame-retardant fillers to polycarbonate can effectively improve its flame-retardant properties. However, directly adding flame-retardant fillers during the phase separation preparation of porous materials can cause them to settle in the solution, thus affecting the flame-retardant efficiency and the material's mechanical properties. Furthermore, the dripping phenomenon during the combustion of porous polymer materials can accelerate fire spread, and existing technologies that directly add flame-retardant fillers are unlikely to achieve the desired anti-dripping effect during polymer combustion. Summary of the Invention

[0005] To address the shortcomings of the existing technologies, the present invention aims to provide a continuous network reinforced polycarbonate-based porous composite flame retardant material and its preparation method. This invention introduces a three-dimensional continuous network structure as a reinforcing phase in the solution phase separation method for preparing porous materials. The three-dimensional continuous network structure serves as a framework, and combined with the phase separation process, it can suppress the sedimentation of flame retardant fillers. Simultaneously, the three-dimensional continuous network structure can also improve the material's mechanical and flame retardant properties, especially exhibiting significant anti-burning and anti-dripping effects. This process is simple, safe, environmentally friendly, and low-cost, and the resulting porous composite material possesses good comprehensive performance.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0007] A method for preparing a continuous network reinforced polycarbonate-based porous composite flame retardant material includes the following steps:

[0008] Polycarbonate and flame-retardant fillers are dissolved in an organic solvent to obtain polycarbonate liquid;

[0009] Add a non-solvent to the polycarbonate liquid and mix well to obtain a mixture;

[0010] The mixture is poured into a material with a continuous network structure and phase separation is performed at a temperature of -10℃ to 10℃. The solvent is replaced and the solid material obtained from the phase separation is soaked to obtain a continuous network reinforced polycarbonate-based porous composite flame retardant material.

[0011] The mass ratio of polycarbonate to flame-retardant filler is 10:0.1~1, and the ratio of polycarbonate to organic solvent is 10g:80mL~130mL.

[0012] In a preferred embodiment of the present invention, the non-solvent is one or a mixture of water, ethanol and methanol.

[0013] In a preferred embodiment of the present invention, the material having a continuous network structure is melamine open-cell foam with a density of 8 kg / m³. 3 ~40kg / m 3 Melamine open-cell foam serves as a reinforcing phase, acting as a three-dimensional framework in the continuous network reinforced polycarbonate-based porous composite flame-retardant material of this invention. When the density of the melamine open-cell foam is less than 9 kg / m³... 3 At times, the melamine content is too low, resulting in poor flame retardant effect; when the density is greater than 40 kg / m³, the flame retardant effect is poor. 3 At times, on the one hand, the density is too high, making it difficult to pour the mixture into the three-dimensional skeleton; on the other hand, melamine is only used for reinforcement, and the matrix is ​​still polycarbonate, so it should not be used in too much quantity.

[0014] In a preferred embodiment of the present invention, the mass ratio of polycarbonate to flame-retardant filler is 10:0.1, and the amount ratio of polycarbonate to organic solvent is 10g:100mL.

[0015] In a preferred embodiment of the present invention, the ratio of non-solvent to polycarbonate is 6 mL to 10 mL: 10 g. If there is too little non-solvent, phase separation cannot be induced; if there is too much non-solvent, the flame-retardant filler will precipitate directly, and a porous integral material cannot be formed.

[0016] In a preferred embodiment of the present invention, the flame-retardant filler includes diethylaluminum hypophosphite, ammonium polyphosphate, carbon black, flake graphite powder, or magnesium hydroxide. The key innovation of this invention lies in how to utilize flame-retardant fillers to prepare continuous network reinforced polycarbonate-based porous composite flame-retardant materials. The types of flame-retardant fillers described above are merely illustrative examples; those skilled in the art can also use other flame-retardant materials, all of which are within the scope of the inventive concept of this invention.

[0017] In a preferred embodiment of the present invention, the organic solvent is tetrahydrofuran. Tetrahydrofuran can dissolve polycarbonate and is miscible with water, ethanol, and methanol. It has a low boiling point and is easy to handle in subsequent drying and other post-processing steps.

[0018] Another object of the present invention is to provide a continuous network reinforced polycarbonate-based porous composite flame retardant material prepared by any of the above-described preparation methods.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] This invention introduces the concept of a three-dimensional continuous network structure reinforcing phase in a method for preparing porous materials through solution phase separation, and provides a method for preparing this special structural composite material. In this invention, polycarbonate and flame-retardant fillers are dissolved in an organic solvent to obtain a polycarbonate liquid. A non-solvent is added to the polycarbonate liquid to obtain a mixture. This mixture is then poured into a material with a continuous network structure, and phase separation is performed at a temperature of -10℃ to 10℃. The solid material obtained after phase separation is then soaked in a different solvent (water). During soaking, tetrahydrofuran and water exchange solvents, which is a necessary step for forming pores. If soaking is not performed and the material is dried directly, adverse phenomena such as pore shrinkage will occur. The final product is a continuous network reinforced polycarbonate-based porous flame-retardant composite material.

[0021] The continuous network reinforced polycarbonate-based porous composite flame retardant material prepared by this invention has a three-dimensional continuous network structure. The non-solvent reduces the solubility of polycarbonate in the system, inducing phase separation after the mixture is poured into the continuous network structure. This reduction in solubility, especially at low temperatures of -10℃ to 10℃, effectively prevents the flame retardant filler from settling in the solution, thus precipitating the product in solid form. Furthermore, this invention uses a polycarbonate to flame retardant filler mass ratio of 10:0.1~1 and a polycarbonate to organic solvent ratio of 10g:80mL~130mL. The low temperature of -10℃ to 10℃ reduces the polymer solubility, causing polymer precipitation and leading to phase separation. The amounts of polycarbonate, flame retardant filler, and organic solvent also affect the phase separation effect. According to this research, too much or too little organic solvent makes it difficult to form a porous material during phase separation, thus preventing the flame retardant from achieving its flame retardant effect.

[0022] According to the experimental results of this invention, on the one hand, the three-dimensional continuous network structure of this invention can improve the mechanical properties and flame retardant properties of porous composite materials, especially with significant effects in inhibiting combustion and preventing dripping. On the other hand, the three-dimensional continuous network structure acts as a skeleton to inhibit the sedimentation of flame retardant fillers. This process is simple, safe, environmentally friendly, and low in cost, and the porous composite material prepared has good comprehensive performance. Attached Figure Description

[0023] Figure 1 This is a flowchart illustrating the preparation process of the continuous network reinforced polycarbonate-based porous composite flame retardant material of the present invention.

[0024] Figure 2 The microstructure of the pure polycarbonate-based porous material prepared in Comparative Example 1 of this invention is shown.

[0025] Figure 3 The microstructure of the continuous network reinforced polycarbonate-based porous composite flame retardant material prepared in Example 1 of this invention is shown. Detailed Implementation

[0026] The following detailed description, in conjunction with embodiments of the present invention and accompanying drawings, provides a clear and complete illustration of the technical solutions in these embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that all technical terms used in this invention are for the purpose of describing specific embodiments only and are not intended to limit the scope of protection of this invention. Unless otherwise specified, all raw materials, reagents, instruments and equipment used in the following embodiments of this invention can be purchased from the market or prepared by existing methods.

[0028] The inventive concept of this invention is as follows:

[0029] To address the problem that "directly adding flame-retardant fillers during the preparation of porous materials through phase separation leads to the sedimentation of the fillers in the solution, thus affecting the flame-retardant efficiency and the mechanical properties of the material; the dripping phenomenon during the combustion of polymer porous materials easily accelerates fire spread; and existing technologies using flame-retardant fillers alone are insufficient to achieve the anti-dripping effect of polymer materials during combustion," this invention provides a method for preparing a continuous network reinforced polycarbonate-based porous composite flame-retardant material, referring to... Figure 1 This includes the following steps:

[0030] Polycarbonate and flame-retardant fillers are dissolved in an organic solvent to obtain polycarbonate liquid;

[0031] A non-solvent is added to the polycarbonate liquid to obtain a mixture;

[0032] The mixture is poured into a material with a continuous network structure and phase separation is performed at a temperature of -10℃ to 10℃. The solid material obtained from the phase separation is soaked in a different solvent to obtain a continuous network reinforced polycarbonate-based porous composite flame retardant material, which is a three-dimensional continuous network structure.

[0033] The mass ratio of polycarbonate to flame-retardant filler is 10:0.1~1, and the ratio of polycarbonate to organic solvent is 10g:80mL~130mL.

[0034] The non-solvent reduces the solubility of polycarbonate in the system, which induces phase separation after the mixture is poured into the continuous network structure. In particular, the decrease in solubility at low temperatures of -10℃ to 10℃ can induce phase separation, which can effectively prevent the flame-retardant filler from settling in the solution, thereby precipitating the product in solid form.

[0035] Preferably, the white solid material obtained by phase separation is soaked in water and dried to obtain a dry, continuous network-reinforced polycarbonate-based porous composite flame retardant material.

[0036] More preferably, the soaking time is 2 days in water, and the drying conditions are 24 hours in an oven at 60°C.

[0037] The experimental raw materials used in the following embodiments and comparative examples of this invention can all be purchased from the market or prepared according to conventional preparation methods well known to those skilled in the art. The polycarbonate used is Yantai Wanhua A1105. The melamine open-cell foam is a three-dimensional mesh structure foam material made from melamine resin, provided by Shanghai Zhenmo New Materials Co., Ltd.

[0038] The water used in the following embodiments and comparative examples of the present invention is deionized water. In other embodiments, those skilled in the art can also replace it with ultrapure water or other water that meets the chemical preparation process.

[0039] Example 1

[0040] A method for preparing a continuous network reinforced polycarbonate-based porous composite flame retardant material includes the following steps:

[0041] (1) Add 10g of polycarbonate and 0.1g of carbon black to 100mL of tetrahydrofuran and stir until completely dispersed and dissolved, i.e., no solid residue, to obtain polycarbonate liquid. Among them, carbon black is a flame retardant filler purchased from Shandong Linzi Qishun Chemical Reagent Company, with a particle size of 20nm.

[0042] (2) While stirring, add 8 mL of water dropwise to the polycarbonate liquid to obtain a mixture, and then add the mixture to a solution with a density of 9 kg / m³. 3 In melamine open-cell foam.

[0043] (3) The material was then transferred to a mold placed at 4°C. After phase separation, a white solid material gradually formed inside the mold. After 24 hours, the solid material was taken out and soaked in water for 2 days.

[0044] (4) Finally, the sample obtained in step (3) is dried in an oven at 60°C for 24 hours to obtain a continuous network reinforced polycarbonate-based porous composite flame retardant material.

[0045] Example 2

[0046] A method for preparing a continuous network reinforced polycarbonate-based porous composite flame retardant material includes the following steps:

[0047] (1) Add 10g of polycarbonate and 0.7g of aluminum diethyl phosphite to 80mL of tetrahydrofuran and stir until completely dispersed and dissolved, i.e., no solid residue remains, to obtain polycarbonate liquid. Among them, aluminum diethyl phosphite is a flame retardant filler purchased from Clariant Chemicals (China) Co., Ltd.

[0048] (2) While stirring, add 6 mL of water dropwise to the polycarbonate liquid to obtain a mixture. Then add the mixture to a solution with a density of 9 kg / m³. 3 In melamine open-cell foam.

[0049] (3) The material was then transferred to a mold placed in a 0°C environment. After phase separation, a white solid material gradually formed inside the mold. After 24 hours, the solid material was taken out and soaked in water for 2 days.

[0050] (4) Finally, the sample obtained in step (3) is dried in an oven at 60°C for 24 hours to obtain a continuous network reinforced polycarbonate-based porous composite flame retardant material.

[0051] Example 3

[0052] A method for preparing a continuous network reinforced polycarbonate-based porous composite flame retardant material includes the following steps:

[0053] (1) Add 10g of polycarbonate and 1g of ammonium polyphosphate (purchased from Zhongshan Sutebao New Materials Co., Ltd., degree of polymerization >1000) to 100mL of tetrahydrofuran and stir until completely dispersed and dissolved, i.e., no solid residue, to obtain polycarbonate liquid. Among them, ammonium polyphosphate is a flame retardant filler.

[0054] (2) While stirring, add 9 mL of water dropwise to the polycarbonate liquid to obtain a mixture, and then add the mixture to a container with a density of 40 kg / m³. 3 In melamine open-cell foam.

[0055] (3) The material was then transferred to a mold placed in a -10°C environment. After phase separation, a white solid material gradually formed inside the mold. After 24 hours, the solid material was taken out and soaked in water for 2 days.

[0056] (4) Finally, the sample obtained in step (3) is dried in an oven at 60°C for 24 hours to obtain a continuous network reinforced polycarbonate-based porous composite flame retardant material.

[0057] Example 4

[0058] A method for preparing a continuous network reinforced polycarbonate-based porous composite flame retardant material includes the following steps:

[0059] (1) Add 10g of polycarbonate and 0.5g of magnesium hydroxide to 130mL of tetrahydrofuran and stir until completely dispersed and dissolved, i.e., no solid residue, to obtain polycarbonate liquid. Among them, magnesium hydroxide is a flame retardant filler.

[0060] (2) While stirring, add 10 mL of water dropwise to the polycarbonate liquid to obtain a mixture, and then add the mixture to a container with a density of 16 kg / m³. 3 In melamine open-cell foam.

[0061] (3) The material was then transferred to a mold placed in a 10°C environment. After phase separation, a white solid material gradually formed inside the mold. After 24 hours, the solid material was taken out and soaked in water for 2 days.

[0062] (4) Finally, the sample obtained in step (3) is dried in an oven at 60°C for 24 hours to obtain a continuous network reinforced polycarbonate-based porous composite flame retardant material.

[0063] Example 5

[0064] A method for preparing a continuous network reinforced polycarbonate-based porous composite flame retardant material includes the following steps:

[0065] (1) Add 10g of polycarbonate and 0.5g of flake graphite powder (purchased from Qingdao Yanhai Carbon Materials Co., Ltd., with a particle size of about 10μm) to 100mL of tetrahydrofuran and stir until completely dispersed and dissolved, i.e., no solid residue, to obtain polycarbonate liquid. Among them, the flake graphite powder is a flame retardant filler.

[0066] (2) While stirring, add 8 mL of water dropwise to the polycarbonate liquid to obtain a mixture. Then add the mixture to a container with a density of 24 kg / m³. 3 In melamine open-cell foam.

[0067] (3) The material was then transferred to a mold placed at 4°C. After phase separation, a white solid material gradually formed inside the mold. After 24 hours, the solid material was taken out and soaked in water for 2 days.

[0068] (4) Finally, the sample obtained in step (3) is dried in an oven at 60°C for 24 hours to obtain a continuous network reinforced polycarbonate-based porous composite flame retardant material.

[0069] Comparative Example 1

[0070] Comparative Example 1 provides a method for preparing a pure polycarbonate porous material without a continuous network of polycarbonate and carbon black, comprising the following steps:

[0071] (1) Add 10g of polycarbonate to 100mL of tetrahydrofuran and stir until completely dissolved to obtain polycarbonate liquid.

[0072] (2) While stirring, add 8 mL of water dropwise to the polycarbonate liquid, then transfer it to a mold at 4°C. After phase separation, a white solid material gradually forms in the mold. After 24 hours, take out the solid material and soak it in water for 2 days.

[0073] (3) Finally, the sample obtained in step (2) is dried in an oven at 60°C for 24 hours to obtain pure polycarbonate-based porous material.

[0074] Comparative Example 2

[0075] Comparative Example 2 provides a method for preparing a polycarbonate-carbon black composite porous material without a continuous network, comprising the following steps:

[0076] (1) Add 10g of polycarbonate and 0.1g of carbon black to 100mL of tetrahydrofuran and stir until completely dispersed and dissolved, i.e., no solid residue, to obtain polycarbonate liquid. Among them, carbon black is a flame retardant filler.

[0077] (2) While stirring, slowly add 8 mL of water drop by drop to the polycarbonate liquid, then transfer it to a mold at 4°C. After phase separation, a white solid material gradually forms in the mold. After 24 hours, take out the solid material and soak it in water for 2 days.

[0078] (3) Finally, the sample obtained in step (2) is dried in an oven at 60°C for 24 hours to obtain a polycarbonate-carbon black composite porous material.

[0079] Comparative Example 3

[0080] Comparative Example 3 provides a method for preparing a polycarbonate-diethylaluminum hypophosphite composite porous material without a continuous network, comprising the following steps:

[0081] (1) Add 10g of polycarbonate and 0.7g of aluminum diethyl phosphite to 80mL of tetrahydrofuran and stir until completely dispersed and dissolved, i.e., no solid residue remains, to obtain polycarbonate liquid. Among them, aluminum diethyl phosphite is a flame retardant filler.

[0082] (2) While stirring, slowly add 8 mL of water drop by drop to the polycarbonate liquid, then transfer it to a mold at 4°C. After phase separation, a white solid material gradually forms in the mold. After 24 hours, take out the solid material and soak it in water for 2 days.

[0083] (3) Finally, the sample obtained in step (2) was dried in an oven at 60°C for 24 h to obtain polycarbonate-diethyl aluminum hypophosphite composite porous material.

[0084] Results Analysis

[0085] Figure 2 The microstructure of the pure polycarbonate-based porous material prepared in Comparative Example 1 of this invention is shown. Figure 3 The image shows the microstructure of the continuous network reinforced polycarbonate-based porous composite flame retardant material prepared in Example 1 of this invention. It can be seen that both materials have porous structures; the difference is that the material prepared in Example 1 has a continuous network composed of melamine, while the material in Comparative Example 1 does not.

[0086] The effectiveness of the continuous network structure is analyzed through performance testing. Density tests, thermal conductivity tests, vertical combustion tests, and cone calorimetry tests were performed on the materials obtained in Examples 1-5 and Comparative Examples 1-3. The test methods are as follows:

[0087] Density was calculated using the displacement method.

[0088] Thermal conductivity test: conducted in accordance with ISO 22007-2:2008 standard, using a DRE-2C thermal conductivity tester;

[0089] UL-94: ASTM D3801, for vertical burning tests;

[0090] Conical calorimetry test: conducted according to ISO 5660 standard, sample size 10 mm, surface heat flow rate 35 kW / m². 2 .

[0091] The test results are shown in Table 1.

[0092] Table 1 Performance test results of different materials

[0093]

[0094] Note: "-" in Table 1 indicates that the data is not available.

[0095] As can be seen from Table 1, the density of the continuous network reinforced polycarbonate-based porous composite flame retardant material prepared in the embodiments of the present invention can reach 0.15 g / cm³. 3 ~0.30 g / cm 3The density of solid polycarbonate sheets is 1.20 g / cm³. 3 The thermal conductivity of the continuous network reinforced polycarbonate-based porous composite flame retardant material can reach 0.040 W / mK~0.060 W / mK, while the thermal conductivity of solid polycarbonate sheets is 0.25 W / mK. This demonstrates that the continuous network reinforced polycarbonate-based porous composite flame retardant material possesses advantages such as lightweight and heat insulation. The continuous network reinforced polycarbonate-based porous composite flame retardant material prepared by this invention is easy to process and mold, can be made into different shapes, and has a wide range of applications.

[0096] Vertical combustion tests can determine the dripping behavior of materials during combustion. After the introduction of the continuous network in this invention, no dripping phenomenon was observed in the polycarbonate porous composite materials. Comparative Examples 1 to 3, which did not contain a continuous network, all exhibited dripping during combustion. Cone calorimetry is the best simulation test method to reflect the combustion behavior of polymers under real fire conditions, where the release of heat radiation is a major factor causing fire-related deaths and injuries. The continuous network-reinforced polycarbonate-based porous composite flame-retardant material of this invention has a much lower heat release rate than the pure polycarbonate-based porous material prepared in Comparative Example 1, indicating better flame-retardant performance. Comparative Examples 2 and 3 were prepared by directly adding flame-retardant fillers carbon black and aluminum diethylphosphinate, respectively. The heat release rate of the porous materials prepared by these two methods did not decrease significantly; in fact, Comparative Example 3 showed a significant increase. This is because without the continuous network to assist filler dispersion, the flame-retardant efficiency of the filler is extremely low. Furthermore, filler aggregation also affects the preparation process of the porous material. For example, the increased density of the sample in Comparative Example 3 ultimately led to a higher heat release rate in Comparative Example 3 compared to the pure polycarbonate porous material prepared in Comparative Example 1.

[0097] It should be noted that when numerical ranges are involved in this invention, it should be understood that both endpoints of each numerical range and any value between the two endpoints can be selected. Since the steps and methods used are the same as in the embodiments, preferred embodiments are described here to avoid redundancy. Although preferred embodiments of the invention have been described, those skilled in the art, once they understand the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this invention.

[0098] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method of making a continuous network enhanced polycarbonate-based porous composite flame retardant material, characterized in that, Includes the following steps: Polycarbonate and flame-retardant fillers are dissolved in an organic solvent to obtain polycarbonate liquid; Add a non-solvent to the polycarbonate liquid and mix well to obtain a mixture; The mixture was poured into a material with a continuous network structure, and phase separation was performed at a temperature of -10℃ to 10℃. The solid material obtained after phase separation was soaked in water instead of solvent to obtain a continuous network reinforced polycarbonate-based porous composite flame retardant material. The material with the continuous network structure was melamine open-cell foam with a density of 9 kg / m³. 3 ~40kg / m 3 ; The mass ratio of polycarbonate to flame-retardant filler is 10:0.1~1, and the ratio of polycarbonate to organic solvent is 10g:80mL~130mL.

2. The method for preparing the continuous network reinforced polycarbonate-based porous composite flame retardant material according to claim 1, characterized in that, The non-solvent is one or a mixture of water, ethanol and methanol.

3. The method for preparing the continuous network reinforced polycarbonate-based porous composite flame retardant material according to claim 1, characterized in that, The mass ratio of polycarbonate to flame-retardant filler is 10:0.1, and the volume ratio of polycarbonate to organic solvent is 10g:100mL.

4. The method for preparing the continuous network reinforced polycarbonate-based porous composite flame retardant material according to claim 1, characterized in that, The ratio of non-solvent to polycarbonate is 6 mL to 10 mL: 10 g.

5. The method for preparing the continuous network reinforced polycarbonate-based porous composite flame retardant material according to claim 1, characterized in that, Flame-retardant fillers include diethylaluminum hypophosphite, ammonium polyphosphate, carbon black, flake graphite powder, or magnesium hydroxide.

6. The method for preparing the continuous network reinforced polycarbonate-based porous composite flame retardant material according to claim 1, characterized in that, The organic solvent is tetrahydrofuran.

7. A continuous network reinforced polycarbonate-based porous composite flame retardant material prepared by the preparation method according to any one of claims 1 to 6.

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