A water-resistant high-capacity carbon dioxide adsorption capture material and its preparation method and application

Abstract

The present invention relates to a water-resistant, high-capacity carbon dioxide adsorption and capture material, its preparation method, and application, and belongs to the technical field of synthesis and application of organic functional materials. The present invention provides a method for preparing the material, which uses Merrifield resin as an active carrier and a monoacylated polyamine as a grafting reagent, and adopts a method of grafting the monoacylated polyamine on the active carrier, hydrolyzing and removing the acyl group, and washing and drying to obtain a finished material. This strategy can effectively inhibit the situation where a polyamine molecule occupies multiple reaction sites on the carrier during the grafting reaction, increase the polyamine loading on the material, and thus increase the carbon dioxide adsorption capacity of the material. The saturated adsorption capacity of the obtained material is above 3.8 mmol / g, and it has high nitrogen efficiency, excellent water resistance and cyclic stability.

Description

Technical Field

[0001] The invention relates to a water-resistant high-capacity carbon dioxide adsorption and capture material and a preparation method thereof, belonging to the technical field of synthesis and application of organic functional materials. Background Art

[0002] Fossil fuel combustion provides the primary driving force for modern society and industrial development, but the resulting waste gas emissions have triggered a series of global extreme climate events. CO2, one of the most important greenhouse gases, has seen its atmospheric concentration rise from 280 ppm at the beginning of the Industrial Revolution to 406 ppm, and is projected to reach 550 ppm by 2050. Before the widespread adoption of alternative energy sources, simply restricting fossil fuel combustion to reduce CO2 emissions will inevitably have a negative impact on industrial development and the socio-economic landscape. Therefore, carbon capture, utilization, and storage (CCUS) is currently the only viable large-scale carbon reduction method, with carbon capture being the most critical technical link. The currently commercialized CO2 capture technology is liquid amine absorption, which exhibits high selectivity for CO2 absorption. However, this method suffers from drawbacks such as high regeneration energy consumption, significant operating losses, and significant equipment corrosion. Furthermore, high construction and operating costs severely restrict the application of liquid amine carbon capture technology. In contrast, solid adsorption separation methods (porous materials such as activated carbon, zeolite molecular sieves, resins, and metal-organic frameworks) offer ease of operation, low regeneration energy consumption, and no equipment corrosion, which to some extent offset the shortcomings of liquid amine absorption methods. However, the adsorption of CO2 by unmodified porous solid materials is purely physical adsorption, with a relatively low adsorption capacity, which cannot meet the needs of large-scale CO2 capture. In recent years, loading organic polyamines on the pore surfaces of porous solid materials to prepare solid-state polyamine adsorbents with both chemical and physical adsorption capabilities has become a promising development direction.

[0003] Currently, reported methods for loading organic polyamines onto the pore surfaces of porous solid materials are divided into physical impregnation modification and chemical grafting. Although the physical impregnation modification method is simple to operate, the resulting adsorbent materials suffer from poor stability, poor water resistance, and limited recyclability. For example, the CO2 adsorption capacity of the PEI@MF (MF: polymelamine-formaldehyde) solid amine adsorbent prepared by the physical impregnation method decreased by 15% after four cycles, making it difficult to meet practical application requirements. Compared to the physical impregnation modification method, the chemical grafting method uses chemical bonds (mostly covalent bonds) to load the polyamine onto the solid substrate. This significantly reduces the polyamine leaching rate during high-temperature regeneration, facilitating the recyclability of the adsorbent material. For example, Chen et al. used the Mannich reaction to graft PEI onto polymelamine-formaldehyde resin to produce a PEI-MF adsorbent. After 20 adsorption-desorption cycles, its CO2 capture capacity remained unchanged.

[0004] However, the grafting rate of materials prepared by chemical grafting is not high, and the adsorption capacity is generally lower than that of physical impregnation modification method. For example, the reported CO2 adsorption capacity of PEI-MF, PEI-MF / PAM resin, and PEI-HPPAN membrane is only 1.32mmol / g, 2.80mmol / g, and 1.50mmol / g, respectively, which is much lower than the solid amine adsorption material prepared by physical impregnation modification method. In the process of grafting reaction between polyamine and active carrier, due to the occurrence of a polyamine molecule occupying multiple reaction sites on the carrier, the polyamine loading on the material is low, which in turn affects the adsorption capacity of the material for carbon dioxide. For example, CN202410319573.4 uses polystyrene resin as a carrier and ethylenediamine (dipropylenetriamine) as aminating agent, and a new amine functionalized carrier PN23 (PN37) for coating polyethyleneimine prepared by direct chemical grafting method has a saturated adsorption capacity of only 3.29mmol / g (3.10mmol / g) for carbon dioxide, and there is still a lot of room for optimization and improvement.

[0005] In view of the fact that when preparing existing grafted solid amine adsorption materials, one polyamine molecule tends to occupy multiple reaction sites on the carrier, resulting in low adsorption capacity, it is necessary to propose a new material structure and establish a new preparation method to increase the polyamine loading on the material, thereby increasing the material's adsorption capacity for carbon dioxide. Summary of the Invention

[0006] The technical problem addressed by the present invention is to overcome the generally low polyamine saturation loading and nitrogen efficiency encountered in existing chemically grafted polyamine preparation processes for carbon dioxide adsorption and capture materials, thereby providing a water-resistant, high-capacity carbon dioxide adsorption and capture material and a method for its preparation. The carbon dioxide adsorption and capture material prepared by the present invention is granular and exhibits high carbon dioxide adsorption efficiency, rapid adsorption rate, and excellent thermal stability. Furthermore, the material exhibits excellent water resistance and cyclic stability. After immersion in boiling water, its carbon dioxide adsorption capacity remains essentially unchanged, and the adsorption capacity remains essentially unchanged after 20 cycles of carbon dioxide adsorption.

[0007] To achieve the purpose of the invention, the present invention is implemented by adopting the following technical solutions:

[0008] In a first aspect, the present invention provides a water-resistant high-capacity carbon dioxide adsorption and capture material.

[0009] -CH2(NHCH2CH2) m NH2; m = 1 ~ 3.

[0010] -CH2-Cl represents Merrifield resin; For polystyrene.

[0011] Secondly, the preparation of the water-resistant high-capacity carbon dioxide adsorption capture material of the present invention is to use Merrifield resin as an active carrier and monoacylated polyamine as a grafting agent, and adopt the method of grafting monoacylated polyamine on the active carrier, hydrolyzing to remove acyl groups, and washing and drying to obtain the finished material.

[0012] The specific preparation method is as follows:

[0013] 1) A dried Merrifield resin active carrier is placed in a certain amount of organic solvent to swell for 2 to 24 hours, an appropriate amount of monoacylated polyamine is added, and the mixture is stirred at 20 to 120° C. for 6 to 48 hours. The solid is filtered and washed thoroughly with ethanol and water in sequence to obtain an intermediate.

[0014] 2) The intermediate is added to a certain concentration of hydrochloric acid, stirred and refluxed for 12 to 36 hours, and the solid is filtered out to obtain a crude material.

[0015] 3) The crude material is washed with deionized water, an alkaline solution, and deionized water in sequence until the aqueous phase remains neutral, and then taken out and dried to obtain the finished product of the water-resistant high-capacity carbon dioxide adsorption capture material.

[0016] Furthermore, the active carrier is Merrifield resin, and the structure is available -CH2Cl means, Polystyrene particles.

[0017] Furthermore, the organic solvent includes ethanol, toluene, xylene, and dimethyl sulfoxide, and the ratio (weight ratio) of the active carrier to the organic solvent is 1:2-10.

[0018] Furthermore, the monoacylated polyamine structure is RCO(NHCH2CH2) m NH2, R is H or CH3, and m is 1 to 3. Furthermore, the ratio of the active carrier to the monoacylated polyamine is 1 g: 5 to 20 mmol.

[0019] Furthermore, the concentration of hydrochloric acid is 4 to 12 mol / L, and the ratio (weight ratio) of the carrier to hydrochloric acid is 1:5 to 10. Furthermore, the concentration of the aqueous sodium hydroxide solution of the alkaline solution is 0.5 to 2.0 mol / L.

[0020] In a third aspect, the present invention provides a use of the water-resistant high-capacity carbon dioxide adsorption and capture material according to the first aspect, wherein the use includes adsorption of carbon dioxide.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The water-resistant, high-capacity carbon dioxide adsorption and capture material provided by the present invention comprises polyamine molecular chain end primary amines covalently linked to active sites on the surface of a polystyrene resin carrier. The material exhibits excellent water resistance and cyclic stability. After being soaked in boiling water, its carbon dioxide adsorption capacity remains substantially unchanged, and the adsorption capacity remains substantially unchanged after 20 cycles of carbon dioxide adsorption. Furthermore, the material contains only primary and secondary amines, but no tertiary amines, which greatly improves the nitrogen efficiency of the material and improves its carbon dioxide adsorption capacity.

[0023] The present invention provides a method for preparing a water-resistant, high-capacity carbon dioxide adsorption and capture material. Using a monoacylated polyamine as a grafting reagent, the method can effectively suppress the occurrence of extra links and surface flooding during the polyamine grafting reaction, reduce the ineffective loss of active sites, and greatly increase the polyamine saturation loading of the carbon dioxide adsorption and capture material, thereby significantly improving the carbon dioxide adsorption capacity of the material. The saturated adsorption capacity of the obtained material is above 3.8 mmol / g. DETAILED DESCRIPTION

[0024] Unless otherwise specified, the experimental methods used in the following examples are conventional methods; the materials and reagents used are commercially available reagents and materials unless otherwise specified.

[0025] Example 1: A water-resistant high-capacity carbon dioxide adsorption capture material HESM-1, wherein the carrier polystyrene resin is linked to the primary amine at the end of the ethylenediamine chain, and its theoretical structure is expressed as follows: -CH2NHCH2CH2NH2, Polystyrene particles.

[0026] The preparation method of the water-resistant high-capacity carbon dioxide adsorption capture material HESM-1 provided in this embodiment includes the following steps:

[0027] 1) 1.0 g of dried Merrifield resin was placed in 2.0 g of ethanol and allowed to swell for 2 h. 0.44 g of N-formylethylenediamine (CAS No. 69219-13-2) (5 mmol) was added and the mixture was stirred at 20° C. for 48 h. The solid was filtered and washed thoroughly with ethanol and water, respectively, to obtain an intermediate.

[0028] 2) The intermediate was added to 4 mol / L hydrochloric acid solution (10.0 g), stirred and refluxed for 36 h, and the solid was filtered out to obtain a crude material.

[0029] 3) The crude material was washed thoroughly with deionized water, a 0.5 mol / L sodium hydroxide aqueous solution, and deionized water in sequence until the aqueous phase remained neutral, and then taken out and dried to obtain the finished product HESM-1 of the water-resistant high-capacity carbon dioxide adsorption capture material.

[0030] Example 2: A water-resistant high-capacity carbon dioxide adsorption capture material HESM-2, wherein the carrier polystyrene resin is linked to the primary amine at the end of the ethylenediamine chain, and its theoretical structure is shown below: -CH2NHCH2CH2NH2; Polystyrene particles.

[0031] The method for preparing the water-resistant high-capacity carbon dioxide adsorption capture material HESM-2 provided in this embodiment includes the following steps:

[0032] 1) 1.0 g of dried Merrifield resin was placed in 5.0 g of toluene and swelled for 12 h. 1.02 g of N-acetylethylenediamine (CAS No.: 1001-53-2) (10 mmol) was added and stirred at 40°C for 40 min.

[0033] h, filter out the solid and wash it thoroughly with ethanol and water in sequence to obtain the intermediate.

[0034] 2) The intermediate was added to 6 mol / L hydrochloric acid solution (8.0 g), stirred and refluxed for 30 h, and the solid was filtered out to obtain a crude material.

[0035] 3) The crude material was washed thoroughly with deionized water, a 1.0 mol / L sodium hydroxide aqueous solution, and deionized water in sequence until the aqueous phase remained neutral, and then taken out and dried to obtain the finished product HESM-2 of the water-resistant high-capacity carbon dioxide adsorption capture material.

[0036] Example 3: A water-resistant high-capacity carbon dioxide adsorption capture material HESM-3, wherein the carrier polystyrene resin is linked to the primary amine at the end of the diethylenetriamine chain, and the theoretical structural expression thereof is as follows: -CH2(NHCH2CH2)2NH2; Polystyrene particles.

[0037] The preparation method of the water-resistant high-capacity carbon dioxide adsorption capture material HESM-3 provided in this embodiment includes the following steps:

[0038] 1) 1.0 g of dried Merrifield resin was placed in 7.0 g of xylene and allowed to swell for 18 h. 1.96 g of N-formyldiethylenetriamine (CAS No.: 301356-18-3) (15 mmol) was added and the mixture was stirred at 60° C. for 36 h. The solid was filtered and washed thoroughly with ethanol and water to obtain an intermediate.

[0039] 2) The intermediate was added to 8 mol / L hydrochloric acid solution (6.0 g), stirred and refluxed for 24 h, and the solid was filtered out to obtain a crude material.

[0040] 3) The crude material was washed thoroughly with deionized water, a 1.5 mol / L sodium hydroxide aqueous solution, and deionized water in sequence until the aqueous phase remained neutral, and then taken out and dried to obtain the finished product HESM-3 of the water-resistant high-capacity carbon dioxide adsorption capture material.

[0041] Example 4: A water-resistant high-capacity carbon dioxide adsorption capture material HESM-4, wherein the carrier polystyrene resin is linked to the primary amine at the end of the diethylenetriamine chain, and its structure is shown below: -CH2(NHCH2CH2)2NH2, Polystyrene particles.

[0042] The method for preparing the water-resistant high-capacity carbon dioxide adsorption capture material HESM-4 provided in this embodiment includes the following steps:

[0043] 1) 1.0 g of dried Merrifield resin was placed in 10.0 g of dimethyl sulfoxide and allowed to swell for 24 h. 2.89 g of N-acetyldiethylenetriamine (CAS No. 76371-02-3) (20 mmol) was added and stirred at 80°C for 24 h. The solid was filtered and washed thoroughly with ethanol and water to obtain an intermediate.

[0044] 2) The intermediate was added to 10 mol / L hydrochloric acid solution (6 g), stirred and refluxed for 22 h, and the solid was filtered to obtain a crude material.

[0045] 3) The crude material was washed thoroughly with deionized water, a 2.0 mol / L sodium hydroxide aqueous solution, and deionized water in sequence until the aqueous phase remained neutral, and then taken out and dried to obtain the finished product HESM-4 of the water-resistant high-capacity carbon dioxide adsorption capture material.

[0046] Example 5: A water-resistant high-capacity carbon dioxide adsorption capture material HESM-5, wherein the carrier polystyrene resin is linked to the primary amine at the end of the triethylenetetramine chain, and its structure is as follows: -CH2(NHCH2CH2)3NH2; Polystyrene particles.

[0047] The preparation method of the water-resistant high-capacity carbon dioxide adsorption capture material HESM-5 provided in this embodiment includes the following steps:

[0048] 1) 1.0 g of dried Merrifield resin was placed in 5.0 g of toluene and allowed to swell for 18 h. 1.76 g of N-formyltriethylenetetramine (CAS No. 301356-19-4) (10 mmol) was added and the mixture was stirred at 100° C. for 12 h. The solid was filtered and washed thoroughly with ethanol and water to obtain an intermediate.

[0049] 2) The intermediate was added to 12 mol / L hydrochloric acid solution (5 g), stirred and refluxed for 12 h, and the solid was filtered to obtain a crude material.

[0050] 3) The crude material was washed thoroughly with deionized water, a 1.0 mol / L sodium hydroxide aqueous solution, and deionized water in sequence until the aqueous phase remained neutral, and then taken out and dried to obtain the finished product HESM-5 of the water-resistant high-capacity carbon dioxide adsorption capture material.

[0051] Example 6: A water-resistant high-capacity carbon dioxide adsorption capture material HESM-6, wherein the carrier polystyrene resin is linked to the primary amine at the end of the triethylenetetramine chain, and its structure is shown below: -CH2(NHCH2CH2)3NH2; Polystyrene particles.

[0052] The method for preparing the water-resistant high-capacity carbon dioxide adsorption capture material HESM-6 provided in this embodiment includes the following steps:

[0053] 1) 1.0 g of dried Merrifield resin was placed in 5.0 g of xylene and allowed to swell for 20 h. 1.9 g of N-acetyltriethylenetetramine (CAS No. 141998-21-2) (10 mmol) was added and the mixture was stirred at 120° C. for 6 h. The solid was filtered and washed thoroughly with ethanol and water to obtain an intermediate.

[0054] 2) The intermediate was added to 6 mol / L hydrochloric acid solution (8 g), stirred and refluxed for 20 h, and the solid was filtered out to obtain a crude material.

[0055] 3) The crude material was washed thoroughly with deionized water, a 1.0 mol / L sodium hydroxide aqueous solution, and deionized water in sequence until the aqueous phase remained neutral, and then taken out and dried to obtain the finished product HESM-6 of the water-resistant high-capacity carbon dioxide adsorption capture material.

[0056] Comparative Example 1: Ethylenediamine and Merrifield resin were directly grafted to prepare carbon dioxide adsorption and capture material, compared with Example 1:

[0057] 1) 1.0 g of dried Merrifield resin was placed in 2.0 g of ethanol and swelled for 2 h. 0.30 g of ethylenediamine (5 mmol) was added and the mixture was stirred at 20° C. for 48 h. The solid was filtered to obtain a crude material.

[0058] 2) The crude material was washed thoroughly with deionized water, 0.5 mol / L sodium hydroxide aqueous solution, and deionized water in sequence until the aqueous phase remained neutral, and then taken out and dried to obtain an ethylenediamine-functionalized carbon dioxide adsorption capture material ESM-1.

[0059] Comparative Example 2: Direct grafting reaction of diethylenetriamine and Merrifield resin to prepare carbon dioxide adsorption and capture material, compared with Example 3:

[0060] 1) 1.0 g of dried Merrifield resin was placed in 7.0 g of xylene and swelled for 18 h. 1.55 g of diethylenetriamine (15 mmol) was added and the mixture was stirred at 60° C. for 36 h. The solid was filtered to obtain a crude material.

[0061] 2) The crude material was washed thoroughly with deionized water, a 1.5 mol / L sodium hydroxide aqueous solution, and deionized water in sequence until the aqueous phase remained neutral, and then taken out and dried to obtain a diethylenetriamine functionalized carbon dioxide adsorption capture material ESM-2.

[0062] Comparative Example 3: Triethylenetetramine and Merrifield resin were directly grafted to prepare carbon dioxide adsorption and capture material, compared with Example 5:

[0063] 1) 1.0 g of dried Merrifield resin was placed in 5.0 g of toluene and swelled for 18 h. 1.46 g of triethylenetetramine (10 mmol) was added and stirred at 100° C. for 12 h. The solid was filtered to obtain a crude material.

[0064] 2) The crude material was washed thoroughly with deionized water, a 1.0 mol / L sodium hydroxide aqueous solution, and deionized water in sequence until the aqueous phase remained neutral, and then taken out and dried to obtain a triethylenetetramine functionalized carbon dioxide adsorption capture material ESM-3.

[0065] Comparative Example 4: N-formylethylenediamine was grafted onto Merrifield resin without undergoing hydrolysis, as compared with Example 1:

[0066] 1) 1.0 g of dried Merrifield resin was placed in 2.0 g of ethanol and swelled for 2 h. 0.44 g of N-formylethylenediamine (5 mmol) was added and stirred at 20° C. for 48 h. The solid was filtered and thoroughly washed with ethanol to obtain a crude material.

[0067] 2) The crude material was washed thoroughly with deionized water, a 0.5 mol / L sodium hydroxide aqueous solution, and deionized water in sequence until the aqueous phase remained neutral, and then taken out and dried to obtain the finished product HESM-4 of the water-resistant high-capacity carbon dioxide adsorption capture material.

[0068] Material performance test:

[0069] (1) Amine loading (E): Weigh m (about 0.1 g) of amine-functionalized carbon dioxide adsorption capture material into a 100 mL conical flask, then transfer 50 mL of HCl solution with a concentration of C2 (about 0.10 mol / L) into it. After shaking in a water bath at 25°C for 12 h, transfer 10 mL of the supernatant and titrate with NaOH solution with a concentration of C1 (about 0.05 mol / L) using phenolphthalein as an indicator until a slightly reddish color remains for 15 seconds without fading, which is the titration end point. The volume of NaOH consumed is V (mL). Repeat the titration three times in parallel according to the titration method. Calculate and obtain the amine loading in mmol / g.

[0070] (2) Adsorption capacity (Q): refers to the saturated adsorption capacity of amine functionalized carbon dioxide adsorption capture material for carbon dioxide, unit mmol / g. The determination is carried out using the DVS atmospheric pressure dynamic weight method, specifically: weigh about 30 mg of material sample into a crucible, purge it with high-purity nitrogen at a flow rate of 400 SCCM, and at the same time raise the temperature to 105 ° C at a rate of 10 ° C / min, maintain the temperature and high-purity nitrogen flow rate for more than 60 minutes until the sample weighs a constant weight, cool it to 25 ° C, and measure the sample weight as G0. Switch the high-purity nitrogen to carbon dioxide (molar mass is M A ), continue to purge the sample at a flow rate of 400 SCCM until the sample weighs a constant weight again, which is considered adsorption saturation. The sample weight is measured as G1. The saturated adsorption capacity is calculated according to the formula: Q = [(G1-G0) / M A ] / G0

[0071] (3) Cyclic stability: It is expressed as the adsorption amount of the amine-functionalized carbon dioxide adsorption capture material after 20 adsorption / desorption cycles and the loss rate compared with the initial adsorption amount.

[0072] (4) Nitrogen efficiency (η): This refers to the proportion of nitrogen atoms loaded by the amine-functionalized carbon dioxide adsorption capture material that can be effectively contacted by CO2 and undergo chemical reactions, i.e., the ratio of the adsorbed amount to the amount of amine loaded. It is affected by the pore structure of the substrate and the spatial dispersion of the polyamine. Nitrogen efficiency is calculated according to the formula η = Q / E.

[0073] (5) Water loss rate: 0.3 g of amine-functionalized CO2 adsorption and capture material was weighed into a reaction flask and covered with deionized water. After heating at 100°C for 24 h, the material was removed and vacuum dried at 60°C to constant weight. The CO2 adsorption capacity was determined by dynamic gravimetry (DVS) at atmospheric pressure. The CO2 loss rate was calculated by comparing the adsorption capacity of the water-treated material to that of the fresh material.

[0074] The test was carried out according to the above test method. The test results are shown in Table 1:

[0075] Table 1. Performance test results of the materials

[0076]

[0077] The data in Table 1 show that the results of Comparative Examples 1 to 3 show that as the polyamine molecular chain lengthens, the polyamine saturation loading, adsorption capacity, and nitrogen efficiency of the amine-functionalized carbon dioxide adsorption capture material gradually decrease. This is because the longer the polyamine chain, the more likely it is to undergo extraneous linkage and surface flooding during the grafting process. Correspondingly, the water-resistant, high-capacity carbon dioxide adsorption capture materials HESM-1, HESM-3, and HESM-5 provided in Examples 1, 3, and 5 exhibit significantly increased polyamine saturation loading, significantly increased carbon dioxide adsorption capacity, and nitrogen efficiency reaching or approaching the theoretical value (0.5). This demonstrates that the method of the present invention can effectively inhibit the occurrence of extraneous linkage and surface flooding during the polyamine grafting reaction, reducing the ineffective loss of active sites on the carrier. Comparative Example 4, compared with Example 1, demonstrates that the nitrogen in the amide is very weak in its ability to adsorb carbon dioxide, and must be hydrolyzed into primary amines to increase the material's carbon dioxide adsorption capacity. It can also be seen that the water-resistant, high-capacity carbon dioxide adsorption and capture materials HESM-1 to HESM-6 provided by the present invention have excellent water resistance and cyclic stability. After being soaked in boiling water, the adsorption capacity for carbon dioxide remains basically unchanged (the maximum loss rate is 1.8%), and the adsorption capacity remains basically unchanged after 20 cycles of adsorbing carbon dioxide (the maximum loss rate is 1.3%).

[0078] The present invention uses the above-described embodiments to illustrate a water-resistant, high-capacity carbon dioxide adsorption and capture material and its preparation method. However, the present invention is not limited to the aforementioned process steps, nor does it necessarily rely on them for implementation. Those skilled in the art will appreciate that any improvements to the present invention, including equivalent substitutions for the raw materials used, additions of auxiliary components, and selection of specific methods, fall within the scope of protection and disclosure of the present invention.

Claims

1. A method for preparing a water-resistant high-capacity carbon dioxide adsorption capture material, characterized in that: The carbon dioxide adsorption and capture material is obtained by using Merrifield resin as an active carrier and monoacylated polyamine as a reagent, grafting monoacylated polyamine on the active carrier, hydrolyzing to remove the acyl group, and washing and drying. The primary amine at the end of the polyamine molecular chain is covalently linked to the active site of the carrier and has the following structural formula: ®-CH2(NHCH2CH2) m NH2;® is polystyrene, m=1~3.

2. The method for preparing the water-resistant high-capacity carbon dioxide adsorption and capture material according to claim 1, characterized in that: The preparation steps are: (1) The active carrier is swelled in an organic solvent, and monoacylated polyamine is added. The reaction is stirred at 20-120°C, and the solid is filtered and washed to obtain an intermediate; (2) Add the intermediate to hydrochloric acid, stir and reflux for 12-36 h, filter out the solid, and obtain the crude material; (3) The crude material is thoroughly washed with an alkaline solution and then washed with water until the aqueous phase is neutral, and then taken out and dried to obtain the water-resistant high-capacity carbon dioxide adsorption capture material.

3. The method for preparing a water-resistant high-capacity carbon dioxide adsorption and capture material according to claim 2, characterized in that: The organic solvent includes ethanol, toluene, xylene, and dimethyl sulfoxide, and the weight ratio of the active carrier to the organic solvent is 1:2-10.

4. The method for preparing a water-resistant high-capacity carbon dioxide adsorption and capture material according to claim 2, wherein: The stirring reaction time is 6~48 h.

5. The method for preparing a water-resistant high-capacity carbon dioxide adsorption and capture material according to claim 2, wherein: The structure of monoacylated polyamine is RCO(NHCH2CH2) m NH2, R is H or CH3, m is 1~3.

6. The method for preparing a water-resistant high-capacity carbon dioxide adsorption and capture material according to claim 2, wherein: The ratio of active carrier to monoacylated polyamine is 1g: 5~20 mmol.

7. The method for preparing a water-resistant high-capacity carbon dioxide adsorption and capture material according to claim 2, characterized in that: The concentration of hydrochloric acid is 4~12 mol / L, and the weight ratio of active carrier to hydrochloric acid is 1:5~10.

8. The method for preparing a water-resistant high-capacity carbon dioxide adsorption and capture material according to claim 2, wherein: The alkaline solution is an aqueous solution of sodium hydroxide or potassium hydroxide with a concentration of 0.5~2.0 mol / L.

9. An application of a water-resistant high-capacity carbon dioxide adsorption capture material prepared according to the method of any one of claims 1 to 8, characterized in that: The applications include use in the adsorption of carbon dioxide.

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