Application of an amino-functionalized hypercrosslinked ionic polymer in VOCs adsorption

Abstract

This invention discloses the application of an amino-functionalized hypercrosslinked ionic polymer in the adsorption of polar small-molecule VOCs, relating to the field of high-efficiency adsorption technology for polar small-molecule VOCs. The method involves mixing a substrate, a crosslinking agent, a functional monomer, a catalyst, and a solvent, and then reacting them in a nitrogen atmosphere to obtain the amino-functionalized hypercrosslinked ionic polymer. This amino-functionalized hypercrosslinked ionic polymer adsorbs polar molecules such as methanol, acetaldehyde, or acetone through abundant adsorption sites. This invention utilizes the strong polarity and electrophilic properties of polar small-molecule VOCs to design and prepare the amino-functionalized hypercrosslinked ionic polymer as an adsorbent. This adsorbent is prepared through a Friedel-Crafts alkylation reaction between the substrate, the crosslinking agent, and the functional monomer. It possesses abundant functional sites, a unique ionic environment, and a microporous structure, exhibiting a high adsorption capacity for polar small-molecule VOCs, far exceeding that of conventional adsorbents such as commercially available activated carbon and molecular sieves.

Description

Technical Field

[0001] This invention relates to the field of high-efficiency adsorption technology for VOCs, and specifically to the application of an amino-functionalized hypercrosslinked ionic polymer in the adsorption of VOCs. Background Technology

[0002] Volatile organic compounds (VOCs) are a major source of air pollution, widely present in industrial production, vehicle exhaust, and indoor decoration processes. VOCs not only pose serious threats to human health but also contribute to environmental problems such as photochemical smog and ozone layer depletion. Therefore, developing efficient and environmentally friendly VOCs adsorption materials has become a current research hotspot. Currently, conventional adsorbents exhibit relatively mature adsorption performance for most VOCs, demonstrating high adsorption capacity and stability for non-polar or weakly polar VOCs. However, for polar small-molecule VOCs, due to their small molecular size, high polarity, weak van der Waals forces with traditional adsorbents, and rapid molecular diffusion rates leading to quick surface saturation of the adsorbent, the adsorption effect of traditional adsorbents on polar small-molecule VOCs is significantly limited.

[0003] Functionalized polymer materials have gradually become a research focus in the field of VOCs adsorption due to their tunable pore structure, abundant surface functional groups, and good chemical stability. Among them, hypercrosslinked polymers (HCPs) show promising application prospects due to their high specific surface area, tunable pore size distribution, and excellent physicochemical stability. However, traditional hypercrosslinked polymers often lack the ability to selectively adsorb specific polar small molecule VOCs, and their surface functionalization is limited, making it difficult to achieve efficient adsorption of polar small molecule VOCs of different polarities and molecular sizes.

[0004] This shows that the existing technology needs further improvement. Summary of the Invention

[0005] The purpose of this invention is to provide an application of amino-functionalized hypercrosslinked ionic polymers in the adsorption of VOCs. The amino-functionalized hypercrosslinked ionic polymers adsorb polar molecules such as methanol, acetaldehyde, or acetone through abundant adsorption sites, exhibiting excellent adsorption performance.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An application of an amino-functionalized hypercrosslinked ionic polymer in the adsorption of VOCs, wherein the application involves using the amino-functionalized hypercrosslinked ionic polymer at a space velocity of 10000 h⁻¹. -1 ~100000h -1The adsorption of methanol, acetaldehyde or acetone, wherein the concentration of methanol, acetaldehyde or acetone is 5 to 300 ppm;

[0008] The preparation method of the amino-functionalized hypercrosslinked ionic polymer includes the following steps:

[0009] a. Mix the substrate, crosslinking agent, functional monomer, catalyst and solvent, wherein the molar ratio of the substrate, functional monomer and crosslinking agent is 1-3:1-3:2-4;

[0010] The substrate is benzimidazole, benzene-substituted imidazole, or indole;

[0011] The crosslinking agent is p-dichlorobenzyl, dichloroethane, or dimethylacetal;

[0012] The functional monomer is a nitrogen-containing substance with a benzene ring;

[0013] b. The mixture obtained in step a is reacted under a nitrogen atmosphere for 20-25 hours to obtain an amino-functionalized hypercrosslinked ionic polymer in one step.

[0014] Preferably, the amino-functionalized hypercrosslinked ionic polymer is subjected to a space velocity of 50,000–60,000 h⁻¹. -1 Adsorption of methanol, acetaldehyde, or acetone.

[0015] The above-mentioned application of an amino-functionalized hypercrosslinked ionic polymer in the adsorption of VOCs, wherein the functional monomer is m-phenylenediamine, phenylalanine, aniline, phenylalanine, tryptophan, tyrosine or dichloroaniline.

[0016] The above-mentioned application of an amino-functionalized hypercrosslinked ionic polymer in the adsorption of VOCs, wherein the crosslinking agent is p-dichlorobenzyl; the functional monomer is phenylalanine; and the substrate is benzimidazole.

[0017] The above-mentioned application of an amino-functionalized hypercrosslinked ionic polymer in the adsorption of VOCs, wherein the catalyst is ferric chloride or aluminum chloride.

[0018] The application of the above-mentioned amino-functionalized hypercrosslinked ionic polymer in the adsorption of VOCs is characterized in that the molar ratio of the substrate, functional monomer, and crosslinking agent is 1:1:2.

[0019] The above-mentioned application of an amino-functionalized hypercrosslinked ionic polymer in the adsorption of VOCs involves a Friedel-Crafts alkylation reaction between the substrate, crosslinking agent, and functional monomer to form an amino-functionalized hypercrosslinked ionic polymer.

[0020] The above-mentioned application of an amino-functionalized hypercrosslinked ionic polymer in the adsorption of VOCs, wherein the amino-functionalized hypercrosslinked ionic polymer adsorbs polar molecules such as methanol, acetaldehyde, or acetone through abundant adsorption sites.

[0021] Compared with the prior art, the present invention brings the following beneficial technical effects:

[0022] This invention utilizes the strong polarity and electrophilic properties of polar small-molecule VOCs to design and prepare amino-functionalized hypercrosslinked ionic polymers as adsorbents. These adsorbents are prepared through a Friedel-Crafts alkylation reaction between the substrate, crosslinking agent, and functional monomer. They possess abundant functional sites, a unique ionic environment, and a microporous structure, exhibiting a high adsorption capacity for polar small-molecule VOCs, far exceeding that of conventional adsorbents such as commercially available activated carbon and molecular sieves.

[0023] This invention uses benzyl dichlorobenzyl as a crosslinking agent, phenylalanine as a functional monomer, and benzimidazole as a substrate to prepare an amino-functionalized hypercrosslinked ionic polymer in one step. This polymer has a rich pore structure and a high ionic liquid content, which is superior to the reported porous polymeric ionic liquid materials. It solves the problems of poor adsorption and low adsorption efficiency of conventional adsorbents for polar small molecule VOCs.

[0024] The amino-functionalized hypercrosslinked ionic polymer prepared by this invention has a highly stable structural feature and exhibits excellent thermal stability during application. At the same time, the amino-functionalized hypercrosslinked ionic polymer can be regenerated and reused, and can still maintain efficient adsorption performance after regeneration. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings:

[0026] Figure 1 This is a breakthrough curve of the amino-functionalized hypercrosslinked ionic polymer of the present invention;

[0027] Figure 2 This is a cyclic diagram of acetaldehyde adsorption by the amino-functionalized hypercrosslinked ionic polymer of the present invention;

[0028] Figure 3 This is a cyclic diagram of acetone adsorption by the amino-functionalized hypercrosslinked ionic polymer of the present invention;

[0029] Figure 4 This is a graph showing the methanol adsorption cycle of the amino-functionalized hypercrosslinked ionic polymer of the present invention.

[0030] Figure 5 This is a pore size distribution diagram of the amino-functionalized hypercrosslinked ionic polymer prepared in Example 1 of the present invention.

[0031] Figure 6The nitrogen adsorption-desorption curve is shown for the amino-functionalized hypercrosslinked ionic polymer prepared in Example 1 of this invention. Detailed Implementation

[0032] This invention proposes the application of an amino-functionalized hypercrosslinked ionic polymer in the adsorption of VOCs. To make the advantages and technical solutions of this invention clearer and more explicit, the invention will be further described below with reference to specific embodiments.

[0033] All the raw materials mentioned in this invention can be purchased through commercial channels.

[0034] The functional monomers described in this invention are m-phenylenediamine, phenylalanine, aniline, phenylalanine, tryptophan, tyrosine, or dichloroaniline.

[0035] The substrate is benzimidazole, benzene-substituted imidazole, or indole;

[0036] The crosslinking agent is p-dichlorobenzyl, dichloroethane, or dimethylacetal;

[0037] The catalyst is ferric chloride or aluminum chloride.

[0038] The crosslinking agent is benzyl dichlorobenzyl; the functional monomer is phenylalanine; and the substrate is benzimidazole.

[0039] The main technical concept of this invention lies in applying amino-functionalized hypercrosslinked ionic polymers to the adsorption of VOCs. By introducing amino functional groups and ionic properties, the adsorption selectivity and capacity for VOCs can be significantly improved. The amino functional groups not only enhance the interaction forces (such as hydrogen bonding and electrostatic interactions) between the material and polar small-molecule VOCs, but also achieve efficient adsorption of VOCs of different polarities by adjusting the surface polarity and pore structure of the material. Furthermore, the introduction of ionic properties further enhances the chemical stability and regeneration performance of the material, making it more advantageous for applications in complex environments.

[0040] Example 1:

[0041] The preparation method of the amino-functionalized hypercrosslinked ionic polymer of the present invention specifically includes the following steps:

[0042] (1) Mix the substrate benzimidazole, the crosslinking agent p-dichlorobenzyl, the functional monomer phenylalanine, the catalyst ferric chloride and the solvent. The molar ratio of the substrate benzimidazole, the functional monomer phenylalanine and the crosslinking agent p-dichlorobenzyl is 1:1:2.

[0043] (2) The resulting mixture was placed under a nitrogen atmosphere and reacted for 24 hours to obtain an amino-functionalized hypercrosslinked ionic polymer in one step.

[0044] The reaction principle of this invention is shown in equation (1):

[0045]

[0046] The pore size distribution diagram of the amino-functionalized hypercrosslinked ionic polymer prepared in this embodiment is shown in the figure below. Figure 5 As shown, the nitrogen adsorption-desorption curves of the amino-functionalized hypercrosslinked ionic polymer are as follows: Figure 6 As shown, from Figure 5 , 6 It can be seen that the prepared amino-functionalized hypercrosslinked ionic polymer has a rich pore structure with hierarchical micropores and mesopores and a wide pore size distribution.

[0047] The amino-functionalized hypercrosslinked ionic polymer prepared in this embodiment is used to adsorb polar small molecule VOCs gases, specifically methanol, acetaldehyde, or acetone, as detailed below. Figures 1-4 As shown.

[0048] from Figure 1 It can be seen that at an airspeed of 54,000 h -1 At an adsorption temperature of 30℃ and an inlet gas concentration of 150ppm, the saturated adsorption capacity for methanol was 103.56 mg / g, for acetaldehyde it was 96.35 mg / g, and for acetone it was 90.65 mg / g.

[0049] from Figure 2 It can be seen that after three cycles of regeneration, the saturated adsorption capacity of acetaldehyde is 83.12 mg / g, which is a decrease of 13.76%.

[0050] from Figure 3 It can be seen that after three cycles of regeneration of acetone, the saturated adsorption capacity is 81.24 mg / g, a decrease of 10.08%.

[0051] from Figure 4 It can be seen that after three cycles of regeneration of methanol, the saturated adsorption capacity is 91.63 mg / g, a decrease of 11.52%.

[0052] In summary, this material exhibits excellent adsorption capacity for methanol, acetaldehyde, and acetone, and maintains strong adsorption capacity even after three cycles.

[0053] Example 2:

[0054] The preparation method of the amino-functionalized hypercrosslinked ionic polymer of the present invention specifically includes the following steps:

[0055] (1) Mix the substrate benzene ring-substituted imidazole, the crosslinking agent dichloroethane, the functional monomer m-phenylenediamine, the catalyst aluminum chloride and the solvent, with the molar ratio of the substrate benzene ring-substituted imidazole, the functional monomer m-phenylenediamine and the crosslinking agent dichloroethane being 1:1:2.

[0056] (2) The resulting mixture was placed under a nitrogen atmosphere and reacted for 24 hours to obtain an amino-functionalized hypercrosslinked ionic polymer in one step.

[0057] The amino-functionalized hypercrosslinked ionic polymer prepared in this embodiment was used to adsorb polar small molecule VOCs gases. It was used to adsorb methanol, acetaldehyde, or acetone, respectively, at a space velocity of 54000 h⁻¹. -1 The specific effects at an adsorption temperature of 30℃ and an inlet gas concentration of 150ppm are as follows: the saturated adsorption capacity for methanol is 91.65mg / g; the saturated adsorption capacity for acetaldehyde is 84.34mg / g; and the saturated adsorption capacity for acetone is 79.81mg / g.

[0058] Example 3:

[0059] The preparation method of the amino-functionalized hypercrosslinked ionic polymer of the present invention specifically includes the following steps:

[0060] (1) Mix the substrate indole, the crosslinking agent dimethyl acetal, the functional monomer dichloroaniline, the catalyst aluminum chloride and the solvent. The molar ratio of the substrate indole, the functional monomer dichloroaniline and the crosslinking agent dimethyl acetal is 1:1:2.

[0061] (2) The resulting mixture was placed under a nitrogen atmosphere and reacted for 24 hours to obtain an amino-functionalized hypercrosslinked ionic polymer in one step.

[0062] The amino-functionalized hypercrosslinked ionic polymer prepared in this embodiment was used to adsorb polar small molecule VOCs gases. It was used to adsorb methanol, acetaldehyde, or acetone, respectively, at a space velocity of 54000 h⁻¹. -1 The specific effects at an adsorption temperature of 30℃ and an inlet gas concentration of 150ppm are as follows: the saturated adsorption capacity for methanol is 90.55mg / g; the saturated adsorption capacity for acetaldehyde is 80.36mg / g; and the saturated adsorption capacity for acetone is 76.76mg / g.

[0063] Example 4:

[0064] The preparation method of the amino-functionalized hypercrosslinked ionic polymer of the present invention specifically includes the following steps:

[0065] (1) Mix the substrate benzimidazole, the crosslinking agent p-dichlorobenzyl, the functional monomer phenylalanine, the catalyst ferric chloride and the solvent. The molar ratio of the substrate benzimidazole, the functional monomer phenylalanine and the crosslinking agent p-dichlorobenzyl is 3:3:4.

[0066] (2) The resulting mixture was placed under a nitrogen atmosphere and reacted for 24 hours to obtain an amino-functionalized hypercrosslinked ionic polymer in one step.

[0067] The amino-functionalized hypercrosslinked ionic polymer prepared in this embodiment was used to adsorb polar small molecule VOCs gases. It was used to adsorb methanol, acetaldehyde, or acetone, respectively, at a space velocity of 54000 h⁻¹. -1 The specific effects at an adsorption temperature of 30℃ and an inlet gas concentration of 150ppm are as follows: the saturated adsorption capacity for methanol is 90.96mg / g; the saturated adsorption capacity for acetaldehyde is 84.56mg / g; and the saturated adsorption capacity for acetone is 78.57mg / g.

[0068] Example 5:

[0069] The preparation method of the amino-functionalized hypercrosslinked ionic polymer of the present invention specifically includes the following steps:

[0070] (1) Mix the substrate benzimidazole, the crosslinking agent p-dichlorobenzyl, the functional monomer phenylalanine, the catalyst ferric chloride and the solvent. The molar ratio of the substrate benzimidazole, the functional monomer phenylalanine and the crosslinking agent p-dichlorobenzyl is 2:2:3.

[0071] (2) The resulting mixture was placed under a nitrogen atmosphere and reacted for 24 hours to obtain an amino-functionalized hypercrosslinked ionic polymer in one step.

[0072] The amino-functionalized hypercrosslinked ionic polymer prepared in this embodiment was used to adsorb polar small molecule VOCs gases. It was used to adsorb methanol, acetaldehyde, or acetone, respectively, at a space velocity of 54000 h⁻¹. -1 The specific effects at an adsorption temperature of 30℃ and an inlet gas concentration of 150ppm are as follows: the saturated adsorption capacity for methanol is 89.87mg / g; the saturated adsorption capacity for acetaldehyde is 80.35mg / g; and the saturated adsorption capacity for acetone is 78.62mg / g.

[0073] Example 6:

[0074] The application of the amino-functionalized hypercrosslinked ionic polymer of this invention specifically includes the following steps:

[0075] (1) Mix the substrate benzimidazole, the crosslinking agent p-dichlorobenzyl, the functional monomer phenylalanine, the catalyst ferric chloride and the solvent. The molar ratio of the substrate benzimidazole, the functional monomer phenylalanine and the crosslinking agent p-dichlorobenzyl is 1:1:2.

[0076] (2) The resulting mixture was placed under a nitrogen atmosphere and reacted for 24 hours to obtain an amino-functionalized hypercrosslinked ionic polymer in one step.

[0077] (3) At an air speed of 54,000 h -1 The amino-functionalized hypercrosslinked ionic polymer was subjected to adsorption experiments at an adsorption temperature of 30℃ and an inlet gas concentration of 10ppm.

[0078] The amino-functionalized hypercrosslinked ionic polymer prepared in this embodiment was used to adsorb polar small molecule VOCs gas. It was used to adsorb methanol, acetaldehyde, or acetone, respectively. The specific effects were as follows: the saturated adsorption capacity for methanol was 25.65 mg / g; the saturated adsorption capacity for acetaldehyde was 18.35 mg / g; and the saturated adsorption capacity for acetone was 14.23 mg / g.

[0079] Example 7:

[0080] The application of the amino-functionalized hypercrosslinked ionic polymer of this invention specifically includes the following steps:

[0081] (1) Mix the substrate benzimidazole, the crosslinking agent p-dichlorobenzyl, the functional monomer phenylalanine, the catalyst ferric chloride and the solvent. The molar ratio of the substrate benzimidazole, the functional monomer phenylalanine and the crosslinking agent p-dichlorobenzyl is 1:1:2.

[0082] (2) The resulting mixture was placed under a nitrogen atmosphere and reacted for 24 hours to obtain an amino-functionalized hypercrosslinked ionic polymer in one step.

[0083] (3) At an air speed of 54,000 h -1 The amino-functionalized hypercrosslinked ionic polymer was subjected to adsorption experiments at an adsorption temperature of 30℃ and an inlet gas concentration of 100ppm.

[0084] The amino-functionalized hypercrosslinked ionic polymer prepared in this embodiment was used to adsorb polar small molecule VOCs gas. It was used to adsorb methanol, acetaldehyde, or acetone, respectively. The specific effects were as follows: the saturated adsorption capacity for methanol was 98.53 mg / g; the saturated adsorption capacity for acetaldehyde was 91.14 mg / g; and the saturated adsorption capacity for acetone was 87.98 mg / g.

[0085] Example 8:

[0086] The application of the amino-functionalized hypercrosslinked ionic polymer of this invention specifically includes the following steps:

[0087] (1) Mix the substrate benzimidazole, the crosslinking agent p-dichlorobenzyl, the functional monomer phenylalanine, the catalyst ferric chloride and the solvent. The molar ratio of the substrate benzimidazole, the functional monomer phenylalanine and the crosslinking agent p-dichlorobenzyl is 1:1:2.

[0088] (2) The resulting mixture was placed under a nitrogen atmosphere and reacted for 24 hours to obtain an amino-functionalized hypercrosslinked ionic polymer in one step.

[0089] (3) At an air speed of 54,000 h -1 The amino-functionalized hypercrosslinked ionic polymer was subjected to adsorption experiments at an adsorption temperature of 30℃ and an inlet gas concentration of 300ppm.

[0090] The amino-functionalized hypercrosslinked ionic polymer prepared in this embodiment was used to adsorb polar small molecule VOCs gas. It was used to adsorb methanol, acetaldehyde, or acetone, respectively. The specific effects were as follows: the saturated adsorption capacity for methanol was 111.72 mg / g; the saturated adsorption capacity for acetaldehyde was 99.89 mg / g; and the saturated adsorption capacity for acetone was 96.75 mg / g.

[0091] Example 9:

[0092] The application of the amino-functionalized hypercrosslinked ionic polymer of this invention specifically includes the following steps:

[0093] (1) Mix the substrate benzimidazole, the crosslinking agent p-dichlorobenzyl, the functional monomer phenylalanine, the catalyst ferric chloride and the solvent. The molar ratio of the substrate benzimidazole, the functional monomer phenylalanine and the crosslinking agent p-dichlorobenzyl is 1:1:2.

[0094] (2) The resulting mixture was placed under a nitrogen atmosphere and reacted for 24 hours to obtain an amino-functionalized hypercrosslinked ionic polymer in one step.

[0095] (3) At an air speed of 10,000 h -1 The amino-functionalized hypercrosslinked ionic polymer was subjected to adsorption experiments at an adsorption temperature of 30℃ and an inlet gas concentration of 150ppm.

[0096] The amino-functionalized hypercrosslinked ionic polymer prepared in this embodiment was used to adsorb polar small molecule VOCs gas. It was used to adsorb methanol, acetaldehyde, or acetone, and the specific effects were as follows: the saturated adsorption capacity for methanol was 113.46 mg / g; the saturated adsorption capacity for acetaldehyde was 102.78 mg / g; and the saturated adsorption capacity for acetone was 99.57 mg / g.

[0097] Example 10:

[0098] The application of the amino-functionalized hypercrosslinked ionic polymer of this invention specifically includes the following steps:

[0099] (1) Mix the substrate benzimidazole, the crosslinking agent p-dichlorobenzyl, the functional monomer phenylalanine, the catalyst ferric chloride and the solvent. The molar ratio of the substrate benzimidazole, the functional monomer phenylalanine and the crosslinking agent p-dichlorobenzyl is 1:1:2.

[0100] (2) The resulting mixture was placed under a nitrogen atmosphere and reacted for 24 hours to obtain an amino-functionalized hypercrosslinked ionic polymer in one step.

[0101] (3) At an airspeed of 100,000 h -1 The amino-functionalized hypercrosslinked ionic polymer was subjected to adsorption experiments at an adsorption temperature of 30℃ and an inlet gas concentration of 150ppm.

[0102] The amino-functionalized hypercrosslinked ionic polymer prepared in this embodiment was used to adsorb polar small molecule VOCs gas. It was used to adsorb methanol, acetaldehyde, or acetone, respectively. The specific effects were as follows: the saturated adsorption capacity for methanol was 89.56 mg / g; the saturated adsorption capacity for acetaldehyde was 81.37 mg / g; and the saturated adsorption capacity for acetone was 75.83 mg / g.

[0103] Comparative Example 1:

[0104] (1) Mix the substrate benzimidazole, the crosslinking agent p-dichlorobenzyl, the catalyst ferric chloride and the solvent. The molar ratio of the substrate benzimidazole, the functional monomer phenylalanine and the crosslinking agent p-dichlorobenzyl is 1:1:2.

[0105] (2) The resulting mixture was placed under a nitrogen atmosphere and reacted for 24 hours to obtain a super-crosslinked ionic polymer in one step.

[0106] The hypercrosslinked ionic polymer prepared in Comparative Example 1 was used to adsorb polar small molecule VOCs gases. It was applied to adsorb methanol, acetaldehyde, or acetone, respectively, at a space velocity of 54000 h⁻¹. -1 The specific effects at an adsorption temperature of 30℃ and an inlet gas concentration of 150ppm are as follows: the saturated adsorption capacity for methanol is 77.52 mg / g; the saturated adsorption capacity for acetaldehyde is 69.56 mg / g; and the saturated adsorption capacity for acetone is 63.63 mg / g.

[0107] Comparative Example 2:

[0108] (1) Mix the substrate 1-vinylimidazole, the crosslinking agent dichloroethane, the functional monomer m-phenylenediamine, the catalyst aluminum chloride and the solvent. The molar ratio of the benzene ring-substituted imidazole, the functional monomer m-phenylenediamine and the crosslinking agent dichloroethane is 1:1:2.

[0109] (2) The resulting mixture was placed under a nitrogen atmosphere and reacted for 24 hours to obtain an amino-functionalized hypercrosslinked ionic polymer in one step.

[0110] The hypercrosslinked ionic polymer prepared in Comparative Example 2 was used to adsorb polar small molecule VOCs gases, specifically methanol, acetaldehyde, or acetone, at a space velocity of 54000 h⁻¹. -1 Specific effects at an adsorption temperature of 30℃ and an inlet gas concentration of 150ppm: The saturated adsorption capacity for methanol is 86.74mg / g; the saturated adsorption capacity for acetaldehyde is 79.31mg / g; and the saturated adsorption capacity for acetone is 70.26mg / g.

[0111] Comparative Example 3:

[0112] (1) Mix the substrate indole, the crosslinking agent dimethyl acetal, the functional monomer dichloroaniline, the catalyst aluminum chloride and the solvent. The molar ratio of the substrate indole, the functional monomer dichloroaniline and the crosslinking agent dimethyl acetal is 1:1:2.

[0113] (2) The resulting mixture was placed under a nitrogen atmosphere and reacted for 24 hours to obtain an amino-functionalized hypercrosslinked ionic polymer in one step.

[0114] The hypercrosslinked ionic polymer prepared in Comparative Example 3 was used to adsorb polar small molecule VOCs gases, specifically methanol, acetaldehyde, or acetone, at a space velocity of 54,000 h⁻¹. -1 Specific effects at an adsorption temperature of 30℃ and an inlet gas concentration of 150ppm: The saturated adsorption capacity for methanol is 79.83mg / g; the saturated adsorption capacity for acetaldehyde is 68.57mg / g; and the saturated adsorption capacity for acetone is 56.0mg / g.

[0115] Any parts not mentioned in this invention can be achieved by referring to existing technologies.

[0116] Those skilled in the art should recognize that the above embodiments are only used to illustrate this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the essential spirit and scope of this application fall within the scope of protection claimed in this application.

Claims

1. The application of an amino-functionalized hypercrosslinked ionic polymer in the adsorption of VOCs, characterized in that, The application described is that of amino-functionalized hypercrosslinked ionic polymers at a space velocity of 10000 h⁻¹ -1 ~100000h -1 The adsorption of polar molecules such as methanol, acetaldehyde, or acetone, wherein the concentration of methanol, acetaldehyde, or acetone is 5–300 ppm. The preparation method of the amino-functionalized hypercrosslinked ionic polymer includes the following steps: a. Mix the substrate, crosslinking agent, functional monomer, catalyst and solvent, wherein the molar ratio of the substrate, functional monomer and crosslinking agent is 1-3:1-3:2-4; The substrate is benzimidazole, benzene-substituted imidazole, or indole; The crosslinking agent is p-dichlorobenzyl, dichloroethane, or dimethylacetal; The functional monomer is a nitrogen-containing substance with a benzene ring; b. The mixture obtained in step a is reacted under a nitrogen atmosphere for 20-25 hours to obtain an amino-functionalized hypercrosslinked ionic polymer in one step. The functional monomers are m-phenylenediamine, phenylalanine, aniline, phenylalanine, tryptophan, tyrosine, or dichloroaniline.

2. The application of an amino-functionalized hypercrosslinked ionic polymer according to claim 1 in the adsorption of VOCs, characterized in that: The crosslinking agent is benzyl dichlorobenzyl; the functional monomer is phenylalanine; and the substrate is benzimidazole.

3. The application of an amino-functionalized hypercrosslinked ionic polymer according to claim 1 in the adsorption of VOCs, characterized in that: The catalyst is ferric chloride or aluminum chloride.

4. The application of an amino-functionalized hypercrosslinked ionic polymer according to claim 1 in the adsorption of VOCs, characterized in that: The molar ratio of the substrate, functional monomer, and crosslinking agent is 1:1:

2.

5. The application of an amino-functionalized hypercrosslinked ionic polymer according to claim 1 in the adsorption of VOCs, characterized in that: A Friedel-Crafts alkylation reaction occurs between the substrate, crosslinking agent, and functional monomer to form an amino-functionalized hypercrosslinked ionic polymer.

6. The application of an amino-functionalized hypercrosslinked ionic polymer according to claim 1 in the adsorption of VOCs, characterized in that: The amino-functionalized hypercrosslinked ionic polymer described above adsorbs polar molecules such as methanol, acetaldehyde, or acetone through abundant adsorption sites.

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