An explosion suppression material, its preparation method and application

Abstract

This invention provides an explosion suppression material, its preparation method, and its application, relating to the field of explosion safety and explosion suppression material technology. The explosion suppression material comprises: a multi-metal-organic framework carrier, and chemically active powder loaded within and on the surface of the multi-metal-organic framework carrier's pores; the multi-metal-organic framework carrier is composed of at least two metal central ions and organic ligands; the chemically active powder is selected from two or more of alkali metal salts, alkaline earth metal salts, phosphates, carbonates, and hydroxides. The core structure of the explosion suppression material of this invention consists of two parts: a "multi-metal-organic framework carrier" and "chemically active powder loaded within and outside its pores." Through synergistic physical structure and complementary chemical functions, these two parts achieve highly efficient suppression of complex two-phase powder-gas explosions.

Description

Technical Field

[0001] This invention relates to the field of explosion safety and explosion suppression materials technology, and in particular to an explosion suppression material, its preparation method and application. Background Technology

[0002] In typical industrial scenarios such as energy structure adjustment and chemical raw material synthesis, two-phase mixed systems of combustible dust (coal powder, polyethylene powder, paper powder, etc.) and combustible gases (hydrogen, ethylene, VOCs, etc.) are widely present. This has become a top priority for preventing and curbing major and serious production safety accidents in my country, and a key issue restricting the safe and healthy development of industry. The chain reaction in a two-phase explosion of dust and gas is more rapid and violent, with key free radicals (·OH, ·O, ·H, etc.) being generated and consumed faster. The explosion hazard is far greater than that of a single-phase explosion, and the control is extremely difficult. Existing conventional explosion suppression materials, such as rock powder, ABC dry powder, and water mist, mainly serve to block energy, physically absorb heat, or dilute oxygen concentration. They are insufficient to effectively intervene in or even block the chain reaction in the early stages of an explosion, and lack design and controllability for different explosive media.

[0003] Metal-organic frameworks (MOFs), as an emerging material, possess unique advantages such as large specific surface area, tunable pore structure, and abundant chemically active sites. They have already found applications in catalysis, medicine, and energy storage, solving a number of major technical challenges that are difficult to address with traditional materials. Utilizing the structural tunability of these materials to construct explosion suppression systems adapted to specific powder-gas two-phase explosion environments has significant scientific importance and promising engineering applications.

[0004] Among related technologies, Chinese patent CN113174057A discloses a nitrogen-phosphorus synergistic Al-based MOF flame retardant, its preparation method, and its application. This technology prepares flame retardants by functionalizing Al-MOFs with phytic acid, mainly for the flame retardant modification of epoxy resins. Its core function lies in catalytic char formation and smoke suppression. However, this material is essentially a single-metal chemical grafting structure, and its mechanism of action is limited to a single mode of nitrogen-phosphorus synergistic char formation, which cannot be applied to the rapid and strong exothermic explosion suppression requirements of powder-gas two-phase explosion media. Chinese patent CN120550368A discloses a composite powder explosion suppressant and its design and preparation methods. This technology utilizes quantum chemical screening of metal oxides and physical compounding with inorganic powders such as bicarbonates. It is mainly used to suppress single hydrogen explosions. The material composition of this scheme is simple, belonging to the physical mixing of inorganic powders. The preparation process mainly relies on ball milling and mixing. It lacks efficient blocking of the chain reaction characteristics of complex powder-gas two-phase systems, and it is difficult to achieve the synergistic effect of multiple effects such as physical barrier, chemical inhibition and endothermic cooling. Summary of the Invention

[0005] To address the technical challenges of existing explosion suppression materials, such as limited functionality, poor controllability, and difficulty in effectively intervening in or even blocking the initial chain reaction of an explosion, this invention provides an explosion suppression material, its preparation method, and its application. The technical solution is as follows:

[0006] This invention provides an explosion suppression material, comprising: a multi-metal-organic framework carrier, and chemically active powder loaded inside and on the surface of the carrier material; the multi-metal-organic framework carrier is composed of at least two metal central ions and organic ligands; the chemically active powder is selected from two or more of alkali metal salts, alkaline earth metal salts, phosphates, carbonates, and hydroxides.

[0007] The explosion suppression material described in this application has a core structure consisting of two parts: a "multi-metal-organic framework carrier" and "chemically active powder loaded inside and outside its pores". The two parts achieve efficient suppression of complex powder-gas two-phase explosions through physical structural synergy and chemical functional complementarity.

[0008] Among them, the multi-metal-organic framework support consists of no less than two metal central ions (such as Cu). 2+ Co 2+ Mn 2+ Mg 2+ Ca 2+ Zn 2+ Fe 3 These ions (such as ⁺) form through coordination self-assembly with organic ligands, possessing a large specific surface area, precisely tunable pore structure (adjustable pore size and channel morphology), and abundant intrinsic chemically active sites. The design logic of their "multi-metal coupling center" is based on the specific capture preference of different metal ions for key free radicals (·OH, ·O, ·H, etc.) in explosive chain reactions: for example, Co… 2+ With Zn 2+ It exhibits high binding activity to ·H radicals, while Mn 2+ with Fe 3+ It exhibits outstanding performance in consuming oxygen-containing free radicals (·OH, ·O). By integrating two or three metal ions into the same framework, a multi-channel free radical consumption network can be constructed to achieve a synergistic explosion suppression effect; at the same time, the combination of multiple metal ions can also directionally regulate the crystal growth direction and pore distribution of the support, providing a suitable structural basis for the efficient loading of chemically active powders.

[0009] Chemically active powders are composed of two or more of alkali metal salts, alkaline earth metal salts, phosphates, carbonates, and hydroxides. The types and ratios of these powders need to be "customized" based on the physicochemical properties (molecular size, reactivity) of the target explosive medium (such as coal powder-hydrogen, polyethylene powder-ethylene, etc.) and the evolution of key free radicals in the initial chain reaction of the explosion. For example, for explosion systems dominated by hydrogen free radicals, a combination of sodium bicarbonate, calcium hydrogen phosphate, and calcium hydroxide can be preferred; while for systems with a high proportion of oxygen free radicals, a combination of sodium bicarbonate and calcium hydrogen phosphate can be preferred.

[0010] This dual adaptation mechanism of "carrier structure design - active component customization" enables the material to achieve precise intervention and efficient suppression of complex explosion scenarios through multiple effects such as physical channel barrier, free radical quenching of multi-metal sites, and endothermic decomposition of active powder.

[0011] At the physics level, MMOFs (Medium-Modular Fibers) carriers play a crucial role due to their large specific surface area and tunable pore structure. Their pore sizes are directionally designed to preferentially adsorb molecules based on the molecular size of the explosive medium. This "molecular sieve" effect rapidly captures combustible molecules in the gas phase, reducing their effective concentration in the air and thus cutting off fuel supply in the early stages of an explosion. Simultaneously, the porous structure of MMOFs effectively blocks flame propagation under explosive impact. Through turbulence and heat loss within the pores, it slows the diffusion rate of free radicals, suppressing the superposition and intensification of explosion waves.

[0012] At the chemical level, a multi-channel consumption network is constructed by utilizing the specific capture capabilities of different metal ions for specific free radicals. Explosive chain reactions rely on the chain propagation of free radicals such as ·OH, ·H, and ·O. By introducing multi-metal coupling centers and utilizing the differences in the electronic structures of different metals, different types of free radicals can be efficiently captured simultaneously. This multi-metal material breaks through the limitation of traditional single-metal materials that can only target a single free radical, achieving a comprehensive blockade of the chain reaction network, with effects far exceeding the simple superposition of single components.

[0013] At the thermodynamic level, the supported chemically active powders undergo decomposition reactions at high temperatures, providing thermodynamic cooling and chemical inhibition. The thermal decomposition of the active powders is a strongly endothermic process, rapidly absorbing the heat generated by the explosion, lowering the system temperature, and reducing the reaction rate constant, thereby inhibiting the explosion's progression. Simultaneously, the inert gases produced during decomposition dilute the oxygen and combustible gas concentrations and form a covering layer on the dust surface, isolating oxygen and inhibiting the dust's pyrolysis and combustion. Furthermore, the type of active powder is customized according to the explosion medium; for example, sodium bicarbonate, selected for hydrogen-containing systems, not only absorbs heat, but its decomposition products can also further react with the ·H free radicals captured by MMOFs, forming a closed-loop inhibition of "carrier capture-powder conversion."

[0014] In summary, this invention utilizes the physical adsorption and multi-metal quenching of MMOFs carriers, combined with the endothermic decomposition and chemical inhibition of the supported powder, to form a comprehensive, multi-layered synergistic defense system encompassing "fuel adsorption, free radical capture, heat removal, and oxygen isolation." This design precisely targets the complex characteristics of the intertwined homogeneous gas-phase and heterogeneous solid-phase reactions in two-phase powder explosions, achieving highly efficient explosion suppression.

[0015] Optionally, the metal center ion in the multi-element metal-organic framework support is selected from Cu. 2+ Co 2+ Mn 2+ Mg 2+ Ca 2+ Zn 2+ Fe 2+ At least two of them form a dual or multi-metal coupling center.

[0016] The organic ligands are selected from one or more of carboxylic acid compounds, nitrogen-containing heterocyclic compounds, or multifunctional ligands containing both carboxyl and nitrogen groups. Using combined ligands can further enhance the structural diversity and functional tunability of MMOF support materials.

[0017] Optionally, the chemically active powder is selected from two or more of sodium bicarbonate, calcium carbonate, calcium hydrogen phosphate, magnesium hydroxide, calcium hydroxide, and ammonium dihydrogen phosphate.

[0018] Optionally, for a two-phase explosion system of pulverized coal mixed with hydrogen, the chemically active powder is a mixture of sodium bicarbonate, dicalcium phosphate, and calcium hydroxide; for a two-phase explosion system of polyethylene powder / ethylene, the chemically active powder is a mixture of sodium bicarbonate and dicalcium phosphate. For the two-phase explosion system of pulverized coal mixed with hydrogen, given its high concentration of H radicals and the tendency of pulverized coal to form a carbon skeleton through pyrolysis, a combination of sodium bicarbonate, dicalcium phosphate, and calcium hydroxide is preferred: sodium bicarbonate releases CO2 and captures free radicals through low-temperature decomposition, while dicalcium phosphate releases water vapor at high temperatures to enhance energy absorption and barrier effects. Simultaneously, the reaction characteristics of calcium hydroxide with acidic free radicals form a multi-layered synergistic explosion suppression mechanism. For the two-phase explosion system of polyethylene powder / ethylene, considering the strong polymerization tendency of ethylene, a combination of sodium bicarbonate and dicalcium phosphate is preferred. The inert gas generated by their decomposition dilutes the oxygen concentration, and combined with endothermic decomposition and physical barrier effects, effectively suppresses the explosion risk caused by the polymerization reaction.

[0019] Optionally, in the explosion suppression material, the mass content of the multi-metal-organic framework is 40%-80%, and the mass content of the chemically active powder is 20%-60%. The particle size of the explosion suppression material is controlled within the range of 10μm-100μm. This specific particle size range is designed to ensure that the material can be rapidly and uniformly dispersed in the explosion medium in the initial stage of the explosion, thereby maximizing its specific surface area and the exposure of reactive sites, and achieving precise capture and efficient suppression of the explosion chain reaction.

[0020] Optionally, the multi-metal-organic framework carrier is composed of three metal central ions, M1, M2, and M3, and organic ligands; wherein the molar ratio of M1:M2:M3 is (0.2-5):(0.2-5):(0-2), and the molar ratio of organic ligands to (M1+M2+M3) is (0.5-3):1.

[0021] The present invention also provides a method for preparing the explosion suppression material as described above, comprising the following steps:

[0022] S1. Preparation of multi-metal-organic framework support: At least two metal central ionic salts are combined with organic ligands to obtain multi-metal-organic framework support;

[0023] S2. Pretreatment of chemically active powders: Drying, grinding and sieving the chemically active powders;

[0024] S3. Functional loading: The chemically active powder pretreated in step S2 is loaded into the pores and surface of the multi-element metal-organic framework carrier prepared in step S1 to obtain the explosion suppression material.

[0025] Optionally, in step S1, at least two metal central ion salts are reacted with organic ligands using a solvothermal method, wherein the reaction temperature of the solvothermal method is 60-200℃ and the reaction time is 6-72 h; or,

[0026] At least two metal central ionic salts are combined with organic ligands using a microwave-assisted method, wherein the microwave power of the microwave-assisted method is 200-1000 W and the reaction time is 10-60 min.

[0027] Optionally, in step S3, the chemically active powder is loaded into the pores and surface of the multi-element metal-organic framework carrier using a ball milling-assisted bonding method; in the ball milling-assisted bonding method, the ball milling parameters are set as follows: ball-to-material ratio of (5-15):1, rotation speed of 100-800 rpm, and ball milling time of 0.5-5 h.

[0028] Optionally, a post-processing step is included after step S3; the post-processing step involves drying, grinding, and sieving the explosion-suppressing material prepared in step S3. The drying is performed under vacuum or freeze-drying at a temperature of 40-80℃ for 4-24 hours; the sieving involves passing the material through a 150-1250 mesh metal sieve to collect powder materials with a particle size not exceeding 100 μm.

[0029] The present invention also provides the application of the explosion suppression material as described above and the explosion suppression material obtained by the preparation method described above in suppressing a two-phase explosion system of pulverized coal mixed with hydrogen or a two-phase explosion system of polyethylene powder / ethylene.

[0030] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following:

[0031] The explosion suppression material provided by this invention achieves significant progress in explosion suppression efficiency, applicability, safety, and economy through the synergistic design of MMOFs carriers and chemically active powders. Regarding explosion suppression efficiency, the "multi-metal coupling center" constructed by the material can simultaneously and efficiently capture multiple key free radicals such as ·H and ·OH, breaking the limitation of traditional single-metal explosion suppressants that can only target a single free radical, thus achieving comprehensive blocking of chain reaction networks. In terms of applicability, relying on the dual adaptation mechanism of "carrier structure design - customized active components," the material can be precisely controlled according to different explosive media such as coal powder / hydrogen and polyethylene / ethylene, solving the problems of poor versatility and insufficient specificity of existing explosion suppression materials. Whether facing systems dominated by hydrogen free radicals or those with a high proportion of oxygen free radicals, the optimal suppression effect can be achieved by adjusting the metal combination and the ratio of active powders. In terms of safety and economy, the large specific surface area and adjustable pore structure of MMOFs carriers not only improve the dispersibility and utilization of active components, but also reduce the overall amount of material used. Under the premise of achieving the same explosion suppression effect, the amount of this material applied per unit area is significantly lower than that of traditional materials, effectively reducing the safety risks and economic costs in transportation, storage and use. Moreover, the reaction process does not produce toxic byproducts, which fully meets the requirements of green and safe industrial applications. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0033] Figure 1 This is a schematic diagram of the preparation process of the explosion suppression material according to an embodiment of the present invention;

[0034] Figure 2aThis is a schematic diagram comparing the expected explosion suppression effects of the explosion suppression materials of the present invention on a two-phase system of pulverized coal with hydrogen.

[0035] Figure 2b This is a schematic diagram comparing the expected explosion suppression effect of the explosion suppression material of the present invention on the polyethylene powder / ethylene two-phase system. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] Example 1: Zn / Mg bimetallic MMOFs-based composite material for two-phase explosion of pulverized coal with hydrogen doping

[0038] This invention provides a burst-suppressing material, the preparation method of which includes the following steps:

[0039] S1. Preparation of multi-metal-organic framework support (Zn / Mg-MMOFs support material):

[0040] 2.10 g of zinc nitrate hexahydrate and 0.77 g of magnesium nitrate hexahydrate were weighed and dissolved in 60 mL of N,N-dimethylformamide to obtain solution A. 1.20 g of 2,5-dihydroxyterephthalic acid and 0.50 g of 2-methylimidazole were weighed and dissolved in 40 mL of DMF to obtain solution B. Solutions A and B were mixed uniformly and magnetically stirred for about 30 min, then transferred to a 100 mL polytetrafluoroethylene-lined reactor. After sealing, the reactor was reacted at 150 °C for 36 h. After the reaction was completed, the reactor was naturally cooled to room temperature. After centrifugation, light yellow crystals were collected and washed three times with DMF and three times with methanol, respectively. After drying at 60 °C under vacuum for 12 h, the Zn / Mg-MMOFs support material was obtained.

[0041] S2. Pretreatment of chemically active powders:

[0042] Sodium bicarbonate was dried at 60℃ for 2 h, calcium hydrogen phosphate was dried at 80℃ for 3 h, and calcium hydroxide was dried at 80℃ for 4 h. Each sample was ground and then passed through a 300-mesh metal sieve.

[0043] S3, Ball milled bonded load:

[0044] 6.0 g of the Zn / Mg-MMOFs support material, 2.0 g of sodium bicarbonate, 1.5 g of dicalcium phosphate, and 0.5 g of calcium hydroxide were weighed and placed in a ball mill jar. Zirconia balls with a diameter of 6 mm were added, and the ball-to-material ratio was set to 12:1. The mixture was ball-milled at 280 rpm for 1.5 h under argon protection. Subsequently, 0.08 g of γ-aminopropyltriethoxysilane was dissolved in 5 mL of anhydrous ethanol and added in the form of a spray. The mixture was then ball-milled at 200 rpm for 20 min to enhance the interfacial bonding and obtain the composite material.

[0045] S4. Post-processing:

[0046] The prepared composite material was dried at 50℃ under vacuum for 10 h, then ground and passed through a 300-mesh metal sieve to obtain a novel MMOFs-based composite explosion suppressant material, named: Zn / Mg-MMOFs@CP-Ⅰ.

[0047] Example 2: Cu / Co / Zn trimetallic MMOFs-based composite material for two-phase explosion of polyethylene powder / ethylene

[0048] This invention provides a burst-suppressing material, the preparation method of which includes the following steps:

[0049] S1. Preparation of multi-component metal-organic framework (Cu / Co / Zn-MMOFs support material)

[0050] 0.90 g of copper nitrate trihydrate, 1.10 g of cobalt nitrate hexahydrate, and 0.90 g of zinc nitrate hexahydrate were weighed and dissolved in 60 mL of deionized water to obtain solution A. 1.20 g of trimesic acid was weighed and dissolved in 50 mL of ethanol to obtain solution B. Solutions A and B were mixed thoroughly and transferred to a microwave reactor. The microwave power was set to 500 W, the reaction temperature to 100℃, and the reaction time to 30 min. After cooling and centrifugation, blue-green crystals were collected, washed twice with deionized water and then twice with ethanol. After drying at 60℃, Cu / Co / Zn-MMOFs support material was obtained.

[0051] S2. Pretreatment of chemically active powders:

[0052] Sodium bicarbonate and calcium hydrogen phosphate are dried, ground, and sieved.

[0053] S3, In-situ Growth Load

[0054] 2.5 g of Cu / Co / Zn-MMOFs support material was slowly added to 100 mL of an aqueous solution containing 5% sodium bicarbonate and 3% dicalcium phosphate. To ensure homogeneity, the mixture was ultrasonically dispersed for approximately 15 min. Subsequently, the temperature was slowly increased to 50 °C while stirring, and CO2 gas was introduced to adjust the pH to approximately 6.8 to promote in-situ crystallization and precipitation of the chemically active components within the pores and on the surface of the MMOFs material. Finally, after 2 h of reaction, the mixture was centrifuged and washed three times with deionized water to obtain the composite material.

[0055] S4. Post-processing:

[0056] The prepared composite material was dried at 60℃ under vacuum for 8 h and then passed through a 400-mesh metal sieve to obtain a novel MMOFs-based composite explosion suppressant material, named: Cu / Co / Zn-MMOFs@CP-Ⅱ.

[0057] Table 1 shows the composition and proportion of the novel MMOFs-based composite explosion suppression materials prepared in Examples 1-2.

[0058] Table 1. Composition and Proportioning of Novel MMOF-Based Composite Explosion Suppression Material

[0059]

[0060] Performance test example:

[0061] Referring to the national standard GB / T 16425-2025, the explosion suppression performance of novel MMOFs-based composite materials was tested using a standard 20L spherical explosion test apparatus, and compared with the explosion suppression effect of existing conventional materials. To ensure the rationality and scientific nature of the performance test, a chemical ignition head with a total energy of 5 kJ was uniformly used. The addition ratio of the powder-gas two-phase explosion medium to the composite explosion suppression material was set according to the actual test examples of conventional powders. The time history evolution data of explosion and explosion suppression pressure were recorded simultaneously, and the maximum explosion pressure (P) was compared. ex The analysis included key parameters such as ) and the results are as follows: Figure 2a As shown in \2b. The key parameter settings for the explosion suppression performance test are shown in Table 2; the comparison of the measured explosion suppression effects of conventional explosion suppression materials and the expected explosion suppression effects of novel MMOFs-based composite materials is shown in Table 3.

[0062] Table 2 Key Parameter Settings for Explosion Suppression Performance Test

[0063]

[0064] Table 3. Comparison of Measured Explosion Suppression Effects of Conventional Explosion Suppression Materials and Expected Explosion Suppression Effects of Novel MMOFs-Based Composite Materials

[0065]

[0066] Comparing the measured explosion suppression effects of conventional explosion suppression materials with the expected explosion suppression effects of composite materials, the novel MMOFs-based composite explosion suppression materials customized and prepared in each embodiment of the present invention are expected to show significantly better explosion suppression effects than existing conventional materials in different explosive media.

[0067] The above results demonstrate that the novel, precise, and efficient explosion suppression material customized design concept and preparation method of "multi-component metal-organic framework (MMOFs) carrier + multi-component chemically active powder" proposed in this invention can achieve precise adaptation of physical structure and chemical function for different types of powder-gas two-phase explosion media, and has important scientific research value and good engineering application prospects.

[0068] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A burst-suppressing material, characterized in that, include: A multi-metal-organic framework carrier, and chemically active powder loaded inside and on the surface of the multi-metal-organic framework carrier; the multi-metal-organic framework carrier is composed of at least two metal central ions and organic ligands; the chemically active powder is selected from two or more of alkali metal salts, alkaline earth metal salts, phosphates, carbonates, and hydroxides.

2. The explosion suppression material according to claim 1, characterized in that, The metal central ion in the multi-metal-organic framework carrier is selected from Cu. 2+ Co 2+ Mn 2+ Mg 2+ Ca 2+ Zn 2+ Fe 2+ At least two of them; The organic ligand is selected from one or more of carboxylic acid compounds, nitrogen-containing heterocyclic compounds, or multifunctional ligands containing both carboxyl and nitrogen groups.

3. The explosion suppression material according to claim 1, characterized in that, The chemically active powder is selected from two or more of sodium bicarbonate, calcium carbonate, calcium hydrogen phosphate, magnesium hydroxide, calcium hydroxide, and ammonium dihydrogen phosphate.

4. The explosion suppression material according to claim 3, characterized in that, For a two-phase explosion system of pulverized coal mixed with hydrogen, the chemically active powder is a mixture of sodium bicarbonate, calcium hydrogen phosphate and calcium hydroxide; For the two-phase explosion system of polyethylene powder / ethylene, the chemically active powder is a mixture of sodium bicarbonate and calcium hydrogen phosphate.

5. The explosion suppression material according to claim 1, characterized in that, In the explosion suppression material, the mass content of the multi-metal-organic framework is 40%-80%, and the mass content of the chemically active powder is 20%-60%; the particle size of the explosion suppression material is controlled within the range of 10μm-100μm.

6. The explosion suppression material according to claim 1, characterized in that, The multi-metal-organic framework carrier is composed of three metal central ions, M1, M2 and M3, and organic ligands; wherein the molar ratio of M1:M2:M3 is (0.2-5):(0.2-5):(0-2), and the molar ratio of organic ligands to (M1+M2+M3) is (0.5-3):

1.

7. A method for preparing the explosion-suppressing material as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. Preparation of multi-metal-organic framework support: At least two metal central ionic salts are combined with organic ligands to obtain multi-metal-organic framework support; S2. Pretreatment of chemically active powders: Drying, grinding and sieving the chemically active powders; S3. Functional loading: The chemically active powder pretreated in step S2 is loaded into the pores and surface of the multi-element metal-organic framework carrier prepared in step S1 to obtain the explosion suppression material.

8. The preparation method according to claim 7, characterized in that, In step S1, at least two metal central ionic salts are reacted with organic ligands using a solvothermal method. The reaction temperature of the solvothermal method is 60-200℃, and the reaction time is 6-72 h; or... At least two metal central ionic salts are combined with organic ligands using a microwave-assisted method, wherein the microwave power of the microwave-assisted method is 200-1000 W and the reaction time is 10-60 min.

9. The preparation method according to claim 5, characterized in that, In step S3, the chemically active powder is loaded into the pores and surface of the multi-element metal-organic framework carrier using a ball milling-assisted bonding method. In the ball milling-assisted bonding method, the ball milling parameters are set as follows: ball-to-material ratio of (5-15):1, rotation speed of 100-800 rpm, and ball milling time of 0.5-5 h.

10. The application of the explosion suppression material as described in any one of claims 1-6 and the explosion suppression material obtained by the preparation method as described in any one of claims 7-9 in suppressing a two-phase explosion system of pulverized coal mixed with hydrogen or a two-phase explosion system of polyethylene powder / ethylene.

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