Application of amino-functionalized super-crosslinked ionic polymer in adsorption of VOCs (Volatile Organic Compounds)

Abstract

The invention discloses application of an amino-functionalized super-crosslinked ionic polymer in adsorption of polar small-molecule VOCs (Volatile Organic Compounds), and relates to the technical field of efficient adsorption of polar small-molecule VOCs. The preparation method comprises the following steps: mixing a substrate, a cross-linking agent, a functional monomer, a catalyst and a solvent, and carrying out a one-step reaction in a nitrogen atmosphere to obtain the amino-functionalized super-crosslinked ionic polymer. The amino-functionalized super-crosslinked ionic polymer adsorbs polar molecules of methanol, acetaldehyde or acetone through rich adsorption sites. The amino-functionalized super-crosslinked ionic polymer is designed and prepared as an adsorbent by utilizing the strong polarity and electrophilic characteristics of polar small-molecule VOCs (Volatile Organic Compounds). The adsorbent is prepared through Friedel-Crafts alkylation reaction among a substrate, a cross-linking agent and a functional monomer, has rich functional sites, a unique ion environment and a micro-mesoporous structure, has high adsorption capacity on polar small molecule VOCs, and is far higher than that of conventional adsorbents such as commercial activated carbon and molecular sieves.

Description

Technical Field

[0001] The invention relates to the technical field of efficient adsorption of VOCs, and in particular to application of an amino-functionalized super-crosslinked ionic polymer in adsorbing VOCs. Background Art

[0002] Volatile organic compounds (VOCs) are one of the important sources of air pollution and are widely present in industrial production, automobile exhaust, interior decoration and other processes. VOCs not only cause serious harm to human health, but also cause environmental problems such as photochemical smog and ozone layer depletion. Therefore, the development of efficient and environmentally friendly VOCs adsorption materials has become one of the current research hotspots. At present, the adsorption performance of conventional adsorbents for most VOCs is relatively mature. Such adsorbents show high adsorption capacity and stability for non-polar or weakly polar VOCs. However, for polar small molecule VOCs, due to their small molecular size and high polarity, the van der Waals force between them and traditional adsorbents is weak, and the molecular diffusion rate is fast, which easily leads to rapid saturation of the adsorbent surface, etc., resulting in the adsorption effect of traditional adsorbents on polar small molecule VOCs being significantly limited.

[0003] Functionalized polymer materials have gradually become the research focus in the field of VOCs adsorption due to their adjustable pore structure, rich surface functional groups and good chemical stability. Among them, hypercrosslinked polymers (HCPs) show good application prospects due to their high specific surface area, adjustable pore size distribution and excellent physical and chemical stability. However, when adsorbing polar small molecule VOCs, traditional hypercrosslinked polymers often lack the high selective adsorption capacity for specific polar small molecule VOCs, and their surface functionalization degree is limited, making it difficult to achieve efficient adsorption of polar small molecule VOCs of different polarities and different molecular sizes.

[0004] This shows that the prior art needs to be further improved. Summary of the invention

[0005] The purpose of the present invention is to provide an amino-functionalized hyper-crosslinked ionic polymer for use in the adsorption of VOCs. The amino-functionalized hyper-crosslinked ionic polymer adsorbs polar molecules such as methanol, acetaldehyde or acetone through abundant adsorption sites, and exhibits excellent adsorption performance.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An application of an amino-functionalized super-crosslinked ion polymer in the adsorption of VOCs, wherein the amino-functionalized super-crosslinked ion polymer is adsorbed at a space velocity of 10000 h -1 ~100000h -1Adsorption 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 hyper-crosslinked ionic polymer comprises the following steps:

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

[0010] The substrate is benzimidazole, imidazole substituted with a benzene ring or indole;

[0011] The cross-linking agent is p-dichlorobenzyl, dichloroalkane or dimethyl acetal;

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

[0013] b. The mixture obtained in step a is placed in a nitrogen atmosphere for reaction for 20 to 25 hours to obtain an amino-functionalized hyper-crosslinked ionic polymer in one step.

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

[0015] The above-mentioned amino-functionalized super-crosslinked ionic polymer is used for adsorbing VOCs, and the functional monomer is m-phenylenediamine, phenylalanine, aniline, phenylalanine, tryptophan, tyrosine or dichloroaniline.

[0016] The above-mentioned amino-functionalized super-crosslinked ionic polymer is used for adsorbing VOCs, wherein the crosslinking agent is p-dichlorobenzyl; the functional monomer is phenylalanine; and the substrate is benzimidazole.

[0017] The above-mentioned amino-functionalized super-crosslinked ionic polymer is used for adsorbing VOCs, and the catalyst is ferric chloride or aluminum chloride.

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

[0019] The above-mentioned amino-functionalized super-crosslinked ionic polymer is used for adsorbing VOCs. A Friedel-Crafts alkylation reaction occurs between the substrate, the crosslinking agent and the functional monomer to form the amino-functionalized super-crosslinked ionic polymer.

[0020] The above-mentioned amino-functionalized hyper-crosslinked ionic polymer is used for adsorbing VOCs. The amino-functionalized hyper-crosslinked 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] The present invention utilizes the strong polarity and electrophilicity of polar small molecule VOCs to design and prepare amino functionalized hyper-crosslinked ionic polymer as an adsorbent. The adsorbent is prepared by Friedel-Crafts alkylation reaction between substrate, crosslinker and functional monomer, has rich functional sites, unique ionic environment and micro-mesoporous structure, and has a high adsorption capacity for polar small molecule VOCs, which is much higher than conventional adsorbents such as commercial activated carbon and molecular sieves.

[0023] The amino-functionalized super-cross-linked ionic polymer prepared by a one-step method using p-dichlorobenzyl as a cross-linking agent, phenylalanine as a functional monomer, and benzimidazole as a substrate has a rich pore structure and a high ionic liquid content, which is superior to the reported porous polymer ionic liquid materials and solves the problems of conventional adsorbents having weak adsorption of polar small molecule VOCs gases and low adsorption efficiency.

[0024] The amino-functionalized super-crosslinked ion polymer prepared by the present invention has a highly stable structural feature and exhibits excellent thermal stability during application. At the same time, the amino-functionalized super-crosslinked ion polymer can be regenerated and reused, and can still maintain efficient adsorption performance after regeneration. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0026] Figure 1 is a penetration curve diagram of the amino-functionalized hyper-crosslinked ionic polymer of the present invention;

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

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

[0029] Figure 4 This is a cycle diagram of methanol adsorption by the amino-functionalized hyper-crosslinked ionic polymer of the present invention;

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

[0031] Figure 6This is a nitrogen adsorption-desorption curve of the amino-functionalized hyper-crosslinked ionic polymer prepared in Example 1 of the present invention. DETAILED DESCRIPTION

[0032] The present invention proposes an application of an amino-functionalized hyper-crosslinked ionic polymer in the adsorption of VOCs. In order to make the advantages and technical solutions of the present invention clearer and more specific, the present invention is further described below in conjunction with specific embodiments.

[0033] The raw materials described in the present invention can be purchased through commercial channels.

[0034] The functional monomer of the present invention is m-phenylenediamine, phenylalanine, aniline, phenylalanine, tryptophan, tyrosine or dichloroaniline.

[0035] The substrate is benzimidazole, imidazole substituted with a benzene ring or indole;

[0036] The cross-linking agent is p-dichlorobenzyl, dichloroalkane or dimethyl acetal;

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

[0038] The cross-linking agent is p-dichlorobenzyl; the functional monomer is phenylalanine; and the substrate is benzimidazole.

[0039] The main technical concept of the present invention is to apply amino-functionalized hyper-crosslinked ionic polymers to the adsorption of VOCs. By introducing amino functional groups and ionic properties, the adsorption selectivity and capacity of VOCs can be significantly improved. The amino functional group can not only enhance the interaction between the material and polar small molecule VOCs (such as hydrogen bonds, electrostatic effects, etc.), but also achieve efficient adsorption of small molecule VOCs of different polarities by adjusting the surface polarity and pore structure of the material. In addition, the introduction of ionic properties further enhances the chemical stability and regeneration performance of the material, making its application in complex environments more advantageous.

[0040] Embodiment 1:

[0041] The preparation method of the amino-functionalized hyper-crosslinked ionic polymer of the present invention specifically comprises the following steps:

[0042] (1) mixing a substrate benzimidazole, a cross-linking agent benzyl dichloride, a functional monomer phenylalanine, a catalyst ferric chloride and a solvent, wherein the molar ratio of the substrate benzimidazole, the functional monomer phenylalanine and the cross-linking agent benzyl dichloride is 1:1:2;

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

[0044] The reaction principle of the present invention is shown in formula (1):

[0045]

[0046] The pore size distribution of the amino-functionalized hypercrosslinked ionic polymer prepared in this example is shown in FIG. Figure 5 As shown in Figure 2, the nitrogen adsorption-desorption curves of amino-functionalized hyper-crosslinked ionic polymers are shown in Figure 2. Figure 6 As shown, from Figure 5 , 6 It can be seen that the prepared amino-functionalized hyper-cross-linked ionic polymer has a rich pore structure with hierarchical micropores and mesopores and a wide pore size distribution.

[0047] The amino-functionalized hyper-crosslinked ionic polymer prepared in this embodiment is used to adsorb polar small molecule VOCs gas, and is used to adsorb methanol, acetaldehyde or acetone, as shown in the following example. Figure 1 to Figure 4 shown.

[0048] from Figure 1 It can be seen that at an airspeed of 54000h -1 , adsorption temperature 30℃, inlet gas concentration 150ppm, the saturated adsorption capacity for methanol is 103.56mg / g, the saturated adsorption capacity for acetaldehyde is 96.35mg / g, and the saturated adsorption capacity for acetone is 90.65mg / g.

[0049] from Figure 2 It can be seen that after three cycles of regeneration of acetaldehyde, the saturated adsorption capacity is 83.12 mg / g, 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 methanol regeneration, the saturated adsorption capacity is 91.63 mg / g, a decrease of 11.52%.

[0052] In summary, this material has excellent adsorption capacity for methanol, acetaldehyde, and acetone, and can still maintain strong adsorption capacity after three cycles.

[0053] Embodiment 2:

[0054] The preparation method of the amino-functionalized hyper-crosslinked ionic polymer of the present invention specifically comprises the following steps:

[0055] (1) mixing a substrate benzene ring substituted imidazole, a crosslinking agent dichloroethane, a functional monomer m-phenylenediamine, a catalyst aluminum chloride and a solvent, wherein the molar ratio of the substrate benzene ring substituted imidazole, the functional monomer m-phenylenediamine and the crosslinking agent dichloroethane is 1:1:2;

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

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

[0058] Embodiment 3:

[0059] The preparation method of the amino-functionalized hyper-crosslinked ionic polymer of the present invention specifically comprises the following steps:

[0060] (1) mixing substrate indole, cross-linking agent dimethyl acetal, functional monomer dichloroaniline, catalyst aluminum chloride and solvent, wherein the molar ratio of substrate indole, functional monomer dichloroaniline and cross-linking agent dimethyl acetal is 1:1:2;

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

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

[0063] Embodiment 4:

[0064] The preparation method of the amino-functionalized hyper-crosslinked ionic polymer of the present invention specifically comprises the following steps:

[0065] (1) mixing a substrate benzimidazole, a cross-linking agent benzyl dichloride, a functional monomer phenylalanine, a catalyst ferric chloride and a solvent, wherein the molar ratio of the substrate benzimidazole, the functional monomer phenylalanine and the cross-linking agent benzyl dichloride is 3:3:4;

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

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

[0068] Embodiment 5:

[0069] The preparation method of the amino-functionalized hyper-crosslinked ionic polymer of the present invention specifically comprises the following steps:

[0070] (1) mixing a substrate benzimidazole, a cross-linking agent p-dichlorobenzyl, a functional monomer phenylalanine, a catalyst ferric chloride and a solvent, wherein the molar ratio of the substrate benzimidazole, the functional monomer phenylalanine and the cross-linking agent p-dichlorobenzyl is 2:2:3;

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

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

[0073] Embodiment 6:

[0074] The application of the amino-functionalized hyper-crosslinked ionic polymer of the present invention specifically comprises the following steps:

[0075] (1) mixing a substrate benzimidazole, a cross-linking agent benzyl dichloride, a functional monomer phenylalanine, a catalyst ferric chloride and a solvent, wherein the molar ratio of the substrate benzimidazole, the functional monomer phenylalanine and the cross-linking agent benzyl dichloride is 1:1:2;

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

[0077] (3) At airspeed 54000h -1 The obtained amino-functionalized hyper-cross-linked ionic polymer was subjected to adsorption experiments at an adsorption temperature of 30°C and an inlet gas concentration of 10 ppm.

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

[0079] Embodiment 7:

[0080] The application of the amino-functionalized hyper-crosslinked ionic polymer of the present invention specifically comprises the following steps:

[0081] (1) mixing a substrate benzimidazole, a cross-linking agent benzyl dichloride, a functional monomer phenylalanine, a catalyst ferric chloride and a solvent, wherein the molar ratio of the substrate benzimidazole, the functional monomer phenylalanine and the cross-linking agent benzyl dichloride is 1:1:2;

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

[0083] (3) At airspeed 54000h -1 The obtained amino-functionalized hyper-cross-linked ionic polymer was subjected to adsorption experiments at an adsorption temperature of 30°C and an inlet gas concentration of 100 ppm.

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

[0085] Embodiment 8:

[0086] The application of the amino-functionalized hyper-crosslinked ionic polymer of the present invention specifically comprises the following steps:

[0087] (1) mixing a substrate benzimidazole, a cross-linking agent benzyl dichloride, a functional monomer phenylalanine, a catalyst ferric chloride and a solvent, wherein the molar ratio of the substrate benzimidazole, the functional monomer phenylalanine and the cross-linking agent benzyl dichloride is 1:1:2;

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

[0089] (3) At airspeed 54000h -1 The obtained amino-functionalized hyper-cross-linked ionic polymer was subjected to adsorption experiments at an adsorption temperature of 30°C and an inlet gas concentration of 300 ppm.

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

[0091] Embodiment 9:

[0092] The application of the amino-functionalized hyper-crosslinked ionic polymer of the present invention specifically comprises the following steps:

[0093] (1) mixing a substrate benzimidazole, a cross-linking agent benzyl dichloride, a functional monomer phenylalanine, a catalyst ferric chloride and a solvent, wherein the molar ratio of the substrate benzimidazole, the functional monomer phenylalanine and the cross-linking agent benzyl dichloride is 1:1:2;

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

[0095] (3) At airspeed 10000h -1 The obtained amino-functionalized hyper-cross-linked ionic polymer was subjected to adsorption experiments at an adsorption temperature of 30°C and an inlet gas concentration of 150 ppm.

[0096] The amino-functionalized hyper-crosslinked ionic polymer prepared in this embodiment is used to adsorb polar small molecule VOCs gas, and is used to adsorb methanol, acetaldehyde or acetone respectively. The specific effects are: the saturated adsorption capacity for methanol is 113.46 mg / g; the saturated adsorption capacity for acetaldehyde is 102.78 mg / g; the saturated adsorption capacity for acetone is 99.57 mg / g.

[0097] Embodiment 10:

[0098] The application of the amino-functionalized hyper-crosslinked ionic polymer of the present invention specifically comprises the following steps:

[0099] (1) mixing a substrate benzimidazole, a cross-linking agent benzyl dichloride, a functional monomer phenylalanine, a catalyst ferric chloride and a solvent, wherein the molar ratio of the substrate benzimidazole, the functional monomer phenylalanine and the cross-linking agent benzyl dichloride is 1:1:2;

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

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

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

[0103] Comparative Example 1:

[0104] (1) mixing a substrate benzimidazole, a cross-linking agent benzyl dichloride, a catalyst ferric chloride and a solvent, wherein the molar ratio of the substrate benzimidazole, the functional monomer phenylalanine and the cross-linking agent benzyl dichloride is 1:1:2;

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

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

[0107] Comparative Example 2:

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

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

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

[0111] Comparative Example 3:

[0112] (1) mixing substrate indole, cross-linking agent dimethyl acetal, functional monomer dichloroaniline, catalyst aluminum chloride and solvent, wherein the molar ratio of substrate indole, functional monomer dichloroaniline and cross-linking agent dimethyl acetal is 1:1:2;

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

[0114] The hypercrosslinked ion polymer prepared in Comparative Example 3 is used to adsorb polar small molecule VOCs gas, and is used to adsorb methanol, acetaldehyde or acetone at a space velocity of 54000h -1 , adsorption temperature 30℃, inlet gas concentration 150ppm, specific effects: the saturated adsorption capacity for methanol is 79.83mg / g; the saturated adsorption capacity for acetaldehyde is 68.57mg / g; the saturated adsorption capacity for acetone is 56.0mg / g.

[0115] Parts not described in the present invention can be implemented by referring to the existing technology.

[0116] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application and are not intended to be limiting of the present application. As long as they are within the spirit and scope of the present application, appropriate changes and modifications to the above embodiments are within the scope of protection claimed in the present application.

Claims

1. An application of an amino-functionalized hyper-crosslinked ionic polymer in the adsorption of VOCs, characterized in that: The application is amino-functionalized hypercrosslinked ionic polymer at a space velocity of 10000h -1 ~100000h -1 Adsorption of polar molecules such as methanol, acetaldehyde or acetone, wherein the concentration of the methanol, acetaldehyde or acetone is 5 to 300 ppm; The preparation method of the amino-functionalized hyper-crosslinked ionic polymer comprises the following steps: a. Mixing a substrate, a cross-linking agent, a functional monomer, a catalyst and a solvent, wherein the molar ratio of the substrate, the functional monomer and the cross-linking agent is 1-3:1-3:2-4; The substrate is benzimidazole, imidazole substituted with a benzene ring or indole; The cross-linking agent is p-dichlorobenzyl, dichloroalkane or dimethyl acetal; The functional monomer is a nitrogen-containing substance having a benzene ring; b. The mixture obtained in step a is placed in a nitrogen atmosphere for reaction for 20 to 25 hours to obtain an amino-functionalized hyper-crosslinked ionic polymer in one step.

2. The use of an amino-functionalized hyper-crosslinked ionic polymer in adsorbing VOCs according to claim 1, characterized in that: The functional monomer is m-phenylenediamine, phenylalanine, aniline, phenylalanine, tryptophan, tyrosine or dichloroaniline.

3. The use of an amino-functionalized hyper-crosslinked ionic polymer in adsorbing VOCs according to claim 2, characterized in that: The cross-linking agent is p-dichlorobenzyl; the functional monomer is phenylalanine; and the substrate is benzimidazole.

4. The use of an amino-functionalized hyper-crosslinked ionic polymer in adsorbing VOCs according to claim 1, characterized in that: The catalyst is ferric chloride or aluminum chloride.

5. The use of an amino-functionalized hyper-crosslinked ionic polymer in adsorbing VOCs according to claim 1, characterized in that: The molar ratio of the substrate, the functional monomer and the cross-linking agent is 1:1:

2.

6. The use of an amino-functionalized hyper-crosslinked ionic polymer in adsorbing VOCs according to claim 1, characterized in that: A Friedel-Crafts alkylation reaction occurs between the substrate, the crosslinking agent and the functional monomer to form an amino-functionalized hyper-crosslinked ionic polymer.

7. The use of an amino-functionalized hyper-crosslinked ionic polymer in adsorbing VOCs according to claim 1, characterized in that: The amino-functionalized hyper-crosslinked ionic polymer adsorbs polar molecules such as methanol, acetaldehyde or acetone through abundant adsorption sites.

Images