Air purification material and preparation method thereof, purification filter element, air conditioning system and vehicle

Abstract

The invention provides an air purification material and a preparation method thereof, a purification filter element, an air conditioning system and a vehicle, and belongs to the technical field of air purification, and the air purification material comprises a coating layer and a microorganism colonization inner core. The coating layer is loaded with a microcapsule, the microcapsule comprises a wall material and a nutritional core material coated in the wall material, the microorganism colonization inner core is coated in the coating layer, and the microorganism colonization inner core comprises a porous base material and gaseous pollutant degrading bacteria loaded on the porous base material. Wherein the nutrition core material provides nutrition for the gaseous pollutant degrading bacteria. The air purification material provided by the embodiment of the invention can maintain long-term and stable gaseous pollutant degradation performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air purification, and in particular to an air purification material, a preparation method thereof, a purification filter element, an air conditioning system and a vehicle. BACKGROUND

[0002] At present, the living and driving environment tends to be closed and diversified in terms of decoration materials. Various gaseous pollutants such as aldehyde and benzene accumulate in the air of the closed environment, which not only affects the comfort of people but also seriously threatens the health of people. In practical applications, the removal of volatile gaseous pollutants in the air conditioning system needs to meet the characteristics of efficient adsorption and degradation, long-term stable conversion, green and environmentally friendly, non-toxic, high material purification, and high and low temperature adaptability, so as to meet the complex environmental changes in the vehicle air conditioning system, significantly improve the air quality in the vehicle, and provide a comfortable driving experience for the driver and passengers.

[0003] In related technologies, the gaseous pollutants are usually removed by microbial agent spraying method or microorganism-fiber loading method. The microbial agent spraying method refers to that the microorganisms are concentrated into liquid bacterial agent and sprayed to the closed environment by spraying to remove the gaseous pollutants in the closed environment. However, the microorganisms are free bacteria, which are easily lost due to airflow scouring and are affected by external environment. The microorganisms are easily inactivated due to temperature and humidity and are easily killed in large quantities due to contact with high-toxicity substances. The bacterial agent needs to be frequently supplemented to avoid decay and play normal efficiency. The microorganism-fiber loading method refers to that the microorganisms and fibers are blended and are prepared into non-woven fabric or plate material with a certain thickness by electrospinning and hot pressing, so as to remove the volatile gaseous pollutants in a certain area. However, the effective area is small, the unit loading of live bacteria is less, and the method only has a certain efficiency on low-concentration volatile gaseous pollutants. In addition, the method has periodic problems and is invalid after a period of use, which cannot achieve long-term removal effect. SUMMARY

[0004] The present application provides an air purification material, a preparation method thereof, a purification filter element, an air conditioning system and a vehicle, which can improve the degradation effect of the air purification filter element on gaseous pollutants and prolong the service life of the air purification material.

[0005] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, an air purification material is provided, which comprises:

[0006] A coating layer, the coating layer is loaded with microcapsules, the microcapsules comprise a wall material and a nutrient core material coated in the wall material;

[0007] A microorganism colonization inner core, the microorganism colonization inner core is coated in the coating layer, and the microorganism colonization inner core comprises a porous substrate and gaseous pollutant degrading bacteria loaded on the porous substrate.

[0008] The nutrient core provides nutrition for the gaseous pollutant-degrading bacteria.

[0009] Optionally, the coating layer, the microcapsule and the microbe colonized inner core are all porous structures.

[0010] Optionally, the thickness of the coating layer is W, the pore size of the coating layer is D1, and 20≤W / D1≤50.

[0011] Optionally, the particle size of the air purification material is 1mm-3.5mm;

[0012] Optionally, the thickness of the coating layer is 0.3mm-1.5mm;

[0013] Optionally, the particle size of the microbe colonized inner core is 0.5mm-2.5mm.

[0014] Optionally, the pore size of the coating layer is D1, and the pore size of the microbe colonized inner core is D2, and D1>D2.

[0015] Optionally, the pore size of the coating layer is 40μm-100μm;

[0016] Optionally, the pore size of the microbe colonized inner core is 10μm-30μm.

[0017] Optionally, the porosity of the coating layer is 40%-65%;

[0018] Optionally, the porosity of the microbe colonized inner core is 30%-50%.

[0019] Optionally, the particle size of the microcapsule is 50μm-150μm;

[0020] Optionally, the pore size of the microcapsule is 50nm-500nm;

[0021] Optionally, the porosity of the microcapsule is 20%-40%;

[0022] Optionally, the thickness of the wall material is 5μm-15μm.

[0023] Optionally, the material of the coating layer comprises at least one of sodium alginate, calcium alginate, chitosan, agarose, agar, cellulose, collagen, polyvinyl alcohol, polyethylene glycol, polyacrylamide, polyacrylate, polycaprolactone, polyurethane, silicone rubber, polylactic acid, polystyrene, and a derivative copolymer of the above-mentioned substances.

[0024] And / or, the material of the wall material comprises at least one of sodium alginate, calcium alginate, chitosan, agarose, agar, cellulose, collagen, polyvinyl alcohol, polyethylene glycol, polyacrylamide, polyacrylate, polycaprolactone, polyurethane, silicone rubber, polylactic acid, polystyrene and derivative copolymers of the above substances;

[0025] And / or, the material of the porous substrate comprises at least one of sodium alginate, calcium alginate, chitosan, agarose, agar, cellulose, collagen, polyvinyl alcohol, polyethylene glycol, polyacrylamide, polyacrylate, polycaprolactone, polyurethane, silicone rubber, polylactic acid, polystyrene and derivative copolymers of the above substances.

[0026] Optionally, the gaseous pollutant-degrading bacteria comprise at least one of aldehyde-degrading bacteria and benzene-degrading bacteria;

[0027] In the aldehyde-degrading bacteria, at least one of Bacillus subtilis, Pseudomonas aeruginosa, Pseudomonas putida, Rhodopseudomonas palustris, Bacillus methylotrophicus, Alcaligenes faecalis, Lactobacillus, Phanerochaete chrysosporium and Saccharomyces cerevisiae is included.

[0028] And / or, the benzene-degrading bacteria comprise at least one of Bacillus subtilis, Bacillus cereus, Pseudomonas aeruginosa, Pseudomonas stutzeri, Pseudomonas putida, Rhodococcus aetherolicus and Rhodococcus rhodnii.

[0029] Optionally, the loading amount of the gaseous pollutant-degrading bacteria in the air purification material is 5x10 8 CFU / mL-15x10 8 CFU / mL.

[0030] Optionally, the nutrient core material comprises a carbon source, a nitrogen source, an inorganic salt, a trace element and a growth factor.

[0031] Optionally, the carbon source comprises at least one of glucose, glycerol and starch hydrolysate;

[0032] And / or, the nitrogen source comprises at least one of yeast extract, ammonium sulfate and L-glutamic acid;

[0033] And / or, the inorganic salt comprises at least one of potassium dihydrogen phosphate, magnesium sulfate and calcium chloride;

[0034] And / or, the growth factor comprises at least one of biotin and vitamin B12.

[0035] According to the second aspect of the present application, a preparation method of the air purification material is also provided, comprising:

[0036] Providing a microorganism colonization inner core and a microcapsule;

[0037] dispersing the coating layer material and the microcapsule into a first solvent to obtain a first mixed solution;

[0038] adding the microorganism colonization inner core into the first mixed solution, and obtaining the air purification material after cross-linking reaction;

[0039] The air purification material comprises a coating layer and a microorganism colonization inner core coated in the coating layer, the coating layer is loaded with microcapsules, the microcapsules comprise a wall material and a nutrient core material coated in the wall material, the microorganism colonization inner core comprises a porous base material and a gaseous pollutant degrading bacteria coated in the porous base material, the nutrient core material is suitable for providing nutrition for the gaseous pollutant degrading bacteria, and the coating layer, the microcapsule and the microorganism colonization inner core are all porous structures.

[0040] Optionally, the preparation method of the microorganism colonization inner core comprises:

[0041] dispersing the porous base material raw material, the first cross-linking agent and the initiator into a second solvent to form a second mixed solution;

[0042] adding the bacteria solution of the gaseous pollutant degrading bacteria and the first pore-forming agent into the second mixed solution, and cross-linking and solidifying to obtain the microorganism colonization inner core.

[0043] Optionally, the first cross-linking agent comprises at least one of N, N-methylene bisacrylamide, calcium chloride, barium chloride, zinc chloride, glutaraldehyde, epichlorohydrin, boric acid, carbodiimide, ethylene glycol dimethacrylate and divinylbenzene;

[0044] and / or, the initiator comprises at least one of ammonium persulfate, benzoyl peroxide and azobisisobutyronitrile;

[0045] and / or, the first pore-forming agent comprises at least one of sodium chloride, potassium chloride, starch, ammonium bicarbonate and azodicarbonamide.

[0046] Optionally, the preparation method of the microcapsule comprises:

[0047] providing the nutrient core material;

[0048] dispersing the wall material raw material into a third solvent to form a third mixed solution;

[0049] adding the nutrient core material into the third mixed solution, and obtaining the microcapsule after emulsification and centrifugation.

[0050] Optionally, dispersing the coating layer material and the microcapsule into a first solvent to obtain a first mixed solution, comprises:

[0051] adding the coating layer material and the second pore-forming agent into the first solvent to obtain a fourth mixed solution;

[0052] adding the microcapsule into the fourth mixed solution to obtain the first mixed solution.

[0053] Optionally, the microbial colonization core is added to the first mixed solution, and after a cross-linking reaction, an air purification material is obtained, comprising:

[0054] adding the microbial colonized cores to the first mixed solution to form pre-coated particles;

[0055] The pre-coated particles are added to the second cross-linking agent solution to undergo a cross-linking reaction to obtain an air purification material.

[0056] According to a third aspect of the present application, a purification filter element is also provided, comprising the air purification material as described above, and / or the air purification material prepared by the method for preparing the air purification material as described above.

[0057] According to a fourth aspect of the present application, an air-conditioning system is also provided, comprising the purification filter element as described above.

[0058] According to a fifth aspect of the present application, a vehicle is also provided, comprising the air-conditioning system as described above.

[0059] The air purification material provided in the embodiment of the present application includes a coating layer and a microbial colonization core. The coating layer is loaded with microcapsules, the microcapsules include a wall material and a nutrient core material coated in the wall material, the microbial colonization core is coated in the coating layer, and the microbial colonization core includes a porous substrate and gaseous pollutant degradation bacteria loaded on the porous substrate. Among them, the nutrient core material provides nutrition for the gaseous pollutant degradation bacteria. The gaseous pollutant degradation bacteria coated in the microbial colonization core can degrade the gaseous pollutants and achieve the purpose of purifying the air, while the coating layer can coat the microbial colonization core, improve the overall mechanical properties, and provide a protective effect. The microcapsules loaded in the coating layer have a nutrient core material, which can provide nutrition for the gaseous pollutant degradation bacteria, maintain the activity and degradation performance of the gaseous pollutant degradation bacteria, and enable the air purification material to function for a long time. That is, the air purification material provided in the embodiment of the present application can maintain long-term and stable gaseous pollutant degradation performance.

[0060] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0062] For a more complete understanding of the present application and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings in which like reference numerals indicate like parts:

[0063] Figure 1 is a schematic diagram of the pore morphology, structure and microcapsule structure of the air purification material provided by the embodiments of the present application;

[0064] Figure 2 is a surface morphology diagram and electron microscope diagram of the air purification material provided by the embodiments of the present application. DETAILED DESCRIPTION

[0065] The technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0066] In a first aspect, referring to Figure 1 The embodiments of the present application provide an air purification material, which comprises a coating layer and a microorganism colonization inner core. The coating layer is loaded with microcapsules, the microcapsules comprise a wall material and a nutrient core material coated in the wall material, and the microorganism colonization inner core is coated in the coating layer, the microorganism colonization inner core comprises a porous substrate and a gaseous pollutant degrading bacteria loaded on the porous substrate. The nutrient core material is suitable for providing nutrition for the gaseous pollutant degrading bacteria. The gaseous pollutant degrading bacteria coated in the microorganism colonization inner core can degrade the gaseous pollutants, achieving the purpose of purifying air, and the coating layer can coat the microorganism colonization inner core, improving the overall mechanical properties and providing a protective effect. The microcapsules loaded in the coating layer have nutrient core materials, which can provide nutrition for the gaseous pollutant degrading bacteria, maintain the activity and degradation performance of the gaseous pollutant degrading bacteria, and enable the air purification material to play a long-term role. The coating layer, the microcapsules and the microorganism colonization inner core are all porous structures, which can facilitate the gaseous pollutants in the air to enter the inside of the air purification material, contact the gaseous pollutant degrading bacteria and be degraded, and the nutrient core material in the microcapsules can be slowly released through the porous wall material, maintaining the activity of the gaseous pollutant degrading bacteria. That is, the air purification material provided by the embodiments of the present application can maintain long-term and stable gaseous pollutant degradation performance.

[0067] The air purification material provided by the embodiments of the present application forms a core-shell structure through the coating layer and the microbial colonization inner core. The coating layer can provide protection for the microbial colonization inner core, forms a physical barrier, has strong pressure resistance, can effectively reduce the loss of bacterial bodies caused by friction and extrusion, mechanical impact or airflow scouring, and the like, and the coating layer can make the microbial colonization inner core have a stable microecological environment, which helps the gaseous pollutant degrading bacteria to maintain long-term activity. The microcapsules loaded in the coating layer can slowly release nutrients to provide nutrition for the gaseous pollutant degrading bacteria, maintain the activity of the gaseous pollutant degrading bacteria, so that the air purification material can play a long-term purification role. That is, the air purification material provided by the embodiments of the present application forms an integrated system of “gaseous pollutant degradation-nutrition supply”, which can realize efficient adsorption and degradation of gaseous pollutants and long-time maintenance of microbial activity.

[0068] The gaseous pollutants can be formaldehyde, acetaldehyde, propyl aldehyde, nonyl aldehyde, acetaldehyde, butyl aldehyde, hexyl aldehyde, octyl aldehyde, heptyl aldehyde, propylene aldehyde and the like aldehyde-based substances, and toluene, ethylbenzene, dimethylbenzene, styrene and the like benzene-based substances.

[0069] In some embodiments, the coating layer, the microcapsules and the microbial colonization inner core are all porous structures. The coating layer, the microbial colonization inner core and the microcapsules are all porous structures, which can facilitate the diffusion and release of gas and nutrients, thereby playing a stable degradation role.

[0070] In some embodiments, the thickness of the coating layer is W, the pore size of the coating layer is D1, and 20≤W / D1≤50. By making the ratio of the thickness and the pore size of the coating layer in the above range, the gas transmission efficiency of the coating layer and the stability of the microbial colonization inner core can be balanced, the structural stability is ensured, and the degradation stability is improved.

[0071] Exemplarily, W / D1 can be 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48 or 50.

[0072] In some embodiments, the particle size of the air purification material is 1mm-3.5mm. By making the particle size of the air purification material in the above range, the activity of the gaseous microbial degrading bacteria and the protection performance of the coating layer can be balanced, the gas diffusion efficiency is optimized, the air purification material can have long-term stable gaseous pollutant degradation performance, and the service life of the air purification material is prolonged.

[0073] Exemplarily, the particle size of the air purification material can be 1mm, 1.5mm, 2mm, 2.5mm, 3mm or 3.5mm.

[0074] In some embodiments, the thickness of the coating layer is 0.3mm-1.5mm. By making the thickness of the coating layer in the above range, a good protective effect can be provided, and air diffusion resistance can be reduced.

[0075] Illustratively, the thickness of the coating layer can be 0.3mm, 0.5mm, 0.7mm, 1mm, 1.2mm or 1.5mm.

[0076] In some embodiments, the particle size of the microbe colonized inner core is 0.5mm-2.5mm. By making the particle size of the microbe colonized inner core in the above range, structural stability can be ensured, and sufficient space can be provided for gaseous pollutant degrading bacteria, which helps to maintain the activity and degradation capacity of the gaseous pollutant degrading bacteria.

[0077] Illustratively, the particle size of the microbe colonized inner core can be 0.5mm, 1mm, 1.5mm, 2mm or 2.5mm.

[0078] In some embodiments, the pore size of the coating layer is D1, and the pore size of the microbe colonized inner core is D2, D1>D2. By making the pore sizes of the coating layer and the microbe colonized inner core different, a gradient pore size can be formed between the two, which can reduce the gas-solid interface resistance in the air purification material, build a high-flow gas channel network, ensure efficient diffusion and exchange of gaseous pollutants and target gases such as oxygen required for degradation, and improve the degradation efficiency of the gaseous pollutant degrading bacteria.

[0079] In some embodiments, the pore size of the coating layer is 40μm-100μm. By making the pore size of the coating layer in the above range, the mechanical properties and gas diffusion efficiency of the coating layer can be balanced.

[0080] Illustratively, the pore size of the coating layer can be 40μm, 45μm, 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 95μm or 100μm.

[0081] In some embodiments, the pore size of the microbe colonized inner core is 10μm-30μm. Similarly, by making the pore size of the microbe colonized inner core in the above range, the mechanical properties and gas diffusion efficiency of the microbe colonized inner core can be balanced.

[0082] Illustratively, the pore size of the microbe colonized inner core can be 10μm, 15μm, 20μm, 25μm or 30μm.

[0083] In some embodiments, the porosity of the coating layer is 40-65%. By having the porosity of the coating layer within the above range, sufficient gas channels can be formed in the coating layer, allowing gaseous pollutant molecules to quickly pass through the coating layer, contact the microbial colonization inner core, and undergo a degradation reaction, thereby optimizing the degradation efficiency. In addition, by having the porosity of the coating layer within the above range, the microbial colonization inner core can be well protected, reducing the impact of external interference factors on the microbial colonization inner core, and maintaining the long-term activity of the gaseous pollutant degrading bacteria.

[0084] For example, the porosity of the coating layer can be 40%, 45%, 50%, 55%, 60%, or 65%.

[0085] In some embodiments, the porosity of the microbial colonization inner core is 30-50%. By having the porosity of the microbial colonization inner core within the above range, the mechanical strength of the microbial colonization inner core and the loading amount of gaseous pollutant degrading bacteria can be ensured, and the diffusion efficiency of gas and nutrients can be ensured, thereby maintaining the activity and degradation performance of the gaseous pollutant degrading bacteria.

[0086] For example, the porosity of the microbial colonization inner core can be 30%, 35%, 40%, 45%, or 50%.

[0087] In some embodiments, the particle size of the microcapsule is 50-150 μm. By having the particle size of the microcapsule within the above range, the structural stability of the microcapsule can be maintained, which helps to stably load the microcapsule on the coating layer.

[0088] In some embodiments, the pore size of the microcapsule is 50-500 nm. By having the pore size of the microcapsule within the above range, the diffusion efficiency of nutrients can be ensured, and nutrient core material leakage can be prevented, thereby ensuring the structural stability of the microcapsule.

[0089] In some embodiments, the porosity of the microcapsule is 20-40%. By having the porosity of the microcapsule within the above range, the diffusion efficiency of nutrients can be ensured, and the structural stability of the microcapsule can be ensured.

[0090] In some embodiments, the thickness of the wall material is 5-15 μm. By having the thickness of the wall material within the above range, the structural stability of the microcapsule can be maintained, and good diffusion efficiency can be achieved.

[0091] In some embodiments, the material of the coating layer includes at least one of sodium alginate, calcium alginate, chitosan, agarose, agar, cellulose, collagen, polyvinyl alcohol, polyethylene glycol, polyacrylamide, polyacrylate, polycaprolactone, polyurethane, silicone rubber, polylactic acid, polystyrene, and a derivative copolymer of the above substances.

[0092] In some embodiments, the material of the wall material includes at least one of sodium alginate, calcium alginate, chitosan, agarose, agar, cellulose, collagen, polyvinyl alcohol, polyethylene glycol, polyacrylamide, polyacrylate, polycaprolactone, polyurethane, silicone rubber, polylactic acid, polystyrene, and a derivative copolymer of the above.

[0093] In some embodiments, the material of the porous substrate includes at least one of sodium alginate, calcium alginate, chitosan, agarose, agar, cellulose, collagen, polyvinyl alcohol, polyethylene glycol, polyacrylamide, polyacrylate, polycaprolactone, polyurethane, silicone rubber, polylactic acid, polystyrene, and a derivative copolymer of the above.

[0094] That is, the material of the coating layer, the wall material, and the porous substrate can be a natural polymer material or a synthetic polymer material. The above materials can be gelled to form a stable film layer structure and provide good coating.

[0095] In some embodiments, the gaseous pollutant-degrading bacteria include at least one of aldehyde-degrading bacteria and benzene-degrading bacteria.

[0096] Aldehydes and benzene are main gaseous pollutants, and by including aldehyde-degrading bacteria and benzene-degrading bacteria in the gaseous pollutant-degrading bacteria, the aldehydes and benzene can be degraded.

[0097] In some embodiments, the aldehyde-degrading bacteria include at least one of B. subtilis, P. aeruginosa, P. putida, R. palustris, B. methylotrophicus, A. faecalis, L. nagelii, P. chrysosporium, and S. cerevisiae. The above bacteria have good degradation effect on aldehydes, can adapt to complex environments, and can balance good activity and degradation performance.

[0098] In some embodiments, the benzene-degrading bacteria include at least one of B. subtilis, B. cereus, P. aeruginosa, P. stutzeri, P. putida, R. aetherivorans, and R. jostii. The above bacteria have good degradation effect on benzene, can adapt to complex environments, and can balance good activity and degradation performance.

[0099] In some embodiments, the load of the gaseous pollutant-degrading bacteria in the air purification material is 5x10 8 CFU / mL-15x10 8 CFU / mL. By making the load of the gaseous pollutant-degrading bacteria in the air purification material within the above range, the degradation efficiency can be improved, and the decrease in activity caused by excessive load can be avoided.

[0100] In some embodiments, the nutrient core material includes a carbon source, a nitrogen source, an inorganic salt, a trace element, and a growth factor. The carbon source, the nitrogen source, the inorganic salt, the trace element, and the growth factor are essential substances for microbial growth, and by including the above-mentioned substances in the nutrient core material, the nutrient supply to the gaseous pollutant-degrading bacteria can be ensured, and the activity can be improved.

[0101] In some embodiments, in the nutrient core material, the mass percentage of the carbon source can be 5%-30%, the mass percentage of the nitrogen source can be 1%-15%, the mass percentage of the inorganic salt can be 1%-7%, the mass percentage of the trace element can be 0.05%-0.7%, and the mass percentage of the growth factor can be 0.002%-0.007%.

[0102] In some embodiments, the carbon source includes at least one of glucose, glycerol, and starch hydrolysate.

[0103] In some embodiments, the nitrogen source includes at least one of yeast extract, ammonium sulfate, and L-glutamic acid.

[0104] In some embodiments, the inorganic salt includes at least one of potassium dihydrogen phosphate, magnesium sulfate, and calcium chloride.

[0105] In some embodiments, the growth factor includes at least one of biotin and vitamin B12.

[0106] It can be understood that those skilled in the art can select appropriate carbon sources, nitrogen sources, inorganic salts, trace elements, and growth factors according to actual needs and the types of strains included in the microbial colonization inner core.

[0107] According to a second aspect of the present application, a preparation method of an air purification material is also provided, comprising:

[0108] providing a microbial colonization inner core and a microcapsule;

[0109] dispersing the coating layer material and the microcapsule into a first solvent to obtain a first mixed solution;

[0110] adding the microbial colonization inner core into the first mixed solution, and after cross-linking reaction, obtaining the air purification material;

[0111] The air purification material comprises a coating layer and a microorganism colonization inner core coated in the coating layer, the coating layer is loaded with microcapsules, the microcapsules comprise a wall material and a nutrient core material coated in the wall material, the microorganism colonization inner core comprises a porous base material and gaseous pollutant degrading bacteria coated in the porous base material, the nutrient core material is suitable for providing nutrition for the gaseous pollutant degrading bacteria, and the coating layer, the microcapsules and the microorganism colonization inner core are all porous structures.

[0112] The preparation method of the air purification material provided in the embodiments of the present application has all the beneficial effects of the air purification material as described above, and will not be described here again.

[0113] In some embodiments, the preparation method of the microorganism colonization inner core comprises:

[0114] The porous base material raw material, the first crosslinking agent and the initiator are dispersed into the second solvent to form a second mixed solution;

[0115] The bacterial solution of the gaseous pollutant degrading bacteria and the first pore-forming agent are added into the second mixed solution, and crosslinking and solidification are performed to obtain the microorganism colonization inner core.

[0116] The porous base material raw material, the first crosslinking agent and the initiator can realize crosslinking and solidification to form a porous base material with a three-dimensional crosslinking network, and the addition of the bacterial solution and the first pore-forming agent can form a porous structure while loading the gaseous pollutants on the porous base material.

[0117] Exemplarily, the preparation method of the microorganism colonization inner core can be as follows:

[0118] The porous base material raw material is dissolved in sterile water, and then the first crosslinking agent and the initiator are added and dissolved under the condition of a water bath at 30-70 DEG C, and ultrasonic dispersion is performed for 10-30 min to obtain a second mixed solution; wherein the mass percentage content of the porous base material raw material in the second mixed solution is 5-25%, the mass percentage content of the first crosslinking agent in the second mixed solution is 1-5%, and the mass percentage content of the initiator in the second mixed solution is 1-5%;

[0119] The second mixed solution and the bacterial solution of the gaseous pollutant degrading bacteria are mixed, and then the first pore-forming agent is added and crosslinked for 1-4 h under the condition of 15-45 DEG C, the first crosslinking agent solution is added dropwise into the crosslinking and solidification at a rate of 0.5-1.8 mL / min using a peristaltic pump, and the crosslinking and solidification is washed with sterile water for 3 times and soaked for 15-36 h to obtain the microorganism colonization inner core. Wherein the volume ratio of the second mixed solution and the bacterial solution of the gaseous pollutant degrading bacteria is (1-10):1, and the mass percentage of the first pore-forming agent in the solution is 7-12%.

[0120] The bacterial solution of the gaseous pollutant degrading bacteria can be prepared by the following method:

[0121] The gaseous pollutant-degrading bacteria are inoculated into the culture medium and activated for 12-48 h at 20-40 °C to the logarithmic growth phase. When multiple bacterial solutions are mixed, they can be mixed in a ratio of (1-2):(1-2).

[0122] In some embodiments, the first crosslinking agent includes at least one of N,N-methylene bisacrylamide, calcium chloride, barium chloride, zinc chloride, glutaraldehyde, epichlorohydrin, boric acid, carbodiimide, ethylene glycol dimethacrylate, and divinylbenzene.

[0123] In some embodiments, the initiator includes at least one of ammonium persulfate, benzoyl peroxide, and azobisisobutyronitrile.

[0124] In some embodiments, the first porogen includes at least one of sodium chloride, potassium chloride, starch, ammonium bicarbonate, and azodicarbonamide.

[0125] In some embodiments, the method for preparing the microcapsules includes:

[0126] providing a nutritional core material;

[0127] dispersing the wall material raw material into a third solvent to form a third mixed solution;

[0128] adding the nutritional core material to the third mixed solution, emulsifying and centrifuging to obtain the microcapsules.

[0129] After the wall material raw material is emulsified, the wall material of gel material can be formed, and the nutritional core material is coated in the wall material to form stable microcapsules.

[0130] Exemplarily, the method for preparing the microcapsules can be as follows:

[0131] dispersing the carbon source, nitrogen source, inorganic salt, trace element, and growth factor in sterile water, and ultrasonic dispersing for 5-25 min to obtain the nutritional core material;

[0132] dispersing the wall material raw material into dichloromethane or deionized water, and stirring until fully dissolved to form a third mixed solution; wherein the mass percentage of the wall material raw material in the third mixed solution is 5-20%;

[0133] adding the nutritional core material to the third mixed solution, emulsifying at a speed of 2000-15000 rpm for 2-20 min, and then centrifuging at a speed of 3000-10000 rpm for 5-25 min to form microcapsule particles, washing with sterile water for 3 times, and then freezing and drying at-40 °C for 24 h to obtain the microcapsules. The mass ratio of the nutritional core material to the third mixed solution is 1:(1-5).

[0134] In some embodiments, the coating layer material and the microcapsules are dispersed into the first solvent to obtain a first mixed solution, comprising:

[0135] The coating layer material and the second pore-forming agent are added into the first solvent to obtain a fourth mixed solution;

[0136] The microcapsules are added into the fourth mixed solution to obtain the first mixed solution.

[0137] By adding the microcapsules and the second pore-forming agent, the obtained coating layer can form a porous structure and load the microcapsules onto the coating layer.

[0138] In some embodiments, the microorganism colonization core is added into the first mixed solution, and after the cross-linking reaction, an air purification material is obtained, comprising:

[0139] The microorganism colonization core is added into the first mixed solution to form a pre-coated particle;

[0140] The pre-coated particle is added into the second cross-linking agent solution for cross-linking reaction to obtain the air purification material.

[0141] By adding the microorganism colonization core into the first mixed solution, the coating layer material can be gelled to form a pre-coated particle, which is then solidified by the cross-linking reaction of the second cross-linking agent solution to form a coating layer with stable mechanical properties and coat the microorganism colonization core inside.

[0142] Exemplarily, the process of preparing the air purification material from the microorganism colonization core and the coating layer raw material can be as follows:

[0143] The coating layer raw material is added into sterile water, then the second pore-forming agent is added, and then the microcapsules are added, and ultrasonic dispersion is performed for 10-35 min to obtain a first mixed solution; wherein in the first mixed solution, the mass percentage of the coating layer raw material is 10%-40%, the mass percentage of the second pore-forming agent is 5%-25%, and the mass percentage of the microcapsules is 10%-35%;

[0144] The microorganism colonization core is added into the first mixed solution, and stirring is performed at a speed of 50-200 rpm for 15-45 min, and spherical particles are collected, and the pre-coated particles are obtained after being placed at room temperature for 1-5 h;

[0145] The pre-coated particles are soaked in the second cross-linking agent solution for 15-35 min, and then taken out and soaked in sterile water for 15-36 h to obtain the air purification material. In the second cross-linking agent solution, the mass percentage of the second cross-linking agent is 2%-5%.

[0146] According to a third aspect of the present application, there is further provided a purification filter element comprising the air purification material as described above, and / or the air purification material prepared by the method as described above.

[0147] The purification filter element provided by the embodiments of the present application has all the beneficial effects of the air purification material as described above, which will not be repeated here.

[0148] In some embodiments, the purification filter element comprises a folded filter paper layer, a honeycomb framework layer and an encapsulation shell layer.

[0149] The folded filter paper layer comprises a primary filter layer and a HEPA (High Efficiency Particulate Air) high-efficiency filter layer. The primary filter layer can be at least one of non-woven fabric and filter cotton, and the material can be at least one of PP and PET. The HEPA high-efficiency filter layer can be at least one of H11 grade HEPA, H12 grade HEPA and H13 grade HEPA. The folded filter paper layer can adopt a regular or irregular pleat structure, the number of one-way pleats can be 18-35, and the pleat edges can be sealed by a hot melting or bonding process. The honeycomb framework layer is a container structure that can load air purification particles, which can be at least one of honeycomb, rhombus, triangle, square and rectangle.

[0150] It can be understood that the purification filter element provided by the embodiments of the present application can be used as a car air conditioner filter element, and can also be used in air purification equipment for home and office environments, air treatment systems for medical clean rooms and laboratories, pollution control devices for industries and manufacturing, ventilation and purification devices for transportation and public spaces, and air purifiers and air conditioning systems in the fields of aerospace, etc.

[0151] According to a fourth aspect of the present application, there is further provided an air conditioning system comprising the purification filter element as described above.

[0152] The air conditioning system provided by the embodiments of the present application has all the beneficial effects of the air purification material as described above, which will not be repeated here.

[0153] According to a fifth aspect of the present application, there is further provided a vehicle comprising the air conditioning system as described above.

[0154] The vehicle provided by the embodiments of the present application has all the beneficial effects of the air purification material as described above, which will not be repeated here.

[0155] The embodiments of the present application will be further described in conjunction with specific examples. It should be understood that these examples are only used to illustrate the present application and not to limit the scope of the present application. The experimental methods in the following examples are not specified, which are usually according to the conditions recommended by the manufacturer.

[0156] Example 1

[0157] (1) Bacillus subtilis ATCC.6633 and Pseudomonas putida KT2440 were inoculated into culture medium respectively, and activated at 30℃, 175rpm for 36h to logarithmic growth phase, to obtain Bacillus subtilis and Pseudomonas putida liquid respectively, and then mixed the two kinds of liquid in a volume ratio of 1:1 to obtain gaseous pollutant degradation bacteria liquid;

[0158] (2) Gelatin with a mass percentage of 10% and gum arabic with a mass percentage of 6% were dissolved in sterile water, and then glucose with a mass percentage of 20%, glycerol with a mass percentage of 10%, yeast extract with a mass percentage of 7%, potassium dihydrogen phosphate with a mass percentage of 5%, magnesium sulfate with a mass percentage of 0.2%, and biotin with a mass percentage of 0.005% were added after dissolving at 50℃, and then ultrasonic dispersion was carried out for 15min to obtain a nutrient matrix; polylactic acid-glycolic acid copolymer with a mass percentage of 12% was dissolved in dichloromethane, and magnetic stirring was carried out until it was clear to obtain a wall material solution, the nutrient matrix was slowly dropped into the wall material solution, and the mass ratio of the two was 1:3, emulsification was carried out at a rotation speed of 9000rpm for 5min, and then centrifugation was carried out at a rotation speed of 8000rpm for 15min to obtain microcapsule particles, which were washed with sterile water for 3 times, and then frozen and dried at-40℃ for 24h to obtain microcapsules;

[0159] (3) Polyacrylamide with a mass percentage of 15% and N,N-methylenebisacrylamide with a mass percentage of 0.5% were dissolved in sterile water, and then ultrasonic dispersion was carried out for 20min in a water bath at 40℃ until they were fully dissolved, ammonium persulfate with a mass percentage of 2.5% and polyethylene glycol 2000 with a mass percentage of 7% were added, and stirring was carried out at a rotation speed of 500rpm for 1min to form a pre-polymer solution; the pre-polymer solution was mixed with the gaseous pollutant degradation bacteria liquid, the volume ratio of the pre-polymer solution to the gaseous pollutant degradation bacteria liquid was 7:1, sodium chloride with a mass percentage of 10% was added, and then mixed uniformly for 1h at 25℃ to obtain a gel core solution; the gel core solution was dropped into a calcium chloride solution with a mass percentage of 2% at a rate of 1.0mL / min using a peristaltic pump with a needle aperture of about 1.0mm for solidification, and then washed with sterile water for 3 times and soaked for 24h to obtain a microorganism colonization core;

[0160] (4) 20% polyacrylamide, 1% N,N-methylene bisacrylamide, 15% sodium chloride, 4% ammonium persulfate, and 15% microcapsules were dissolved in sterile water, and then mixed uniformly, 4% boric acid was added, and then ultrasonic dispersion was performed for 25 min to obtain a coating layer suspension; the microbial colonization core was immersed in the coating layer suspension, and magnetic stirring was performed at a speed of 100 rpm for 25 min, the spherical particles were taken out, and then placed at room temperature for 4 h to obtain pre-coated particles; the pre-coated particles were immersed in a 3% boric acid solution for 25 min, and then taken out and immersed in sterile water for 24 h to obtain air purification materials with a particle size of 1.1 mm-1.5 mm;

[0161] (5) Filter core assembly: 40 g of the air purification material was placed in a honeycomb framework with a length of 210 mm, a width of 210 mm, a thickness of 5 mm, and a circular diameter of 10 mm, and then active carbon mesh composite, folding layer composite, and edge assembly processes were performed, the folding layer included non-woven fabric and H11 grade HEPA, and the folding layer was installed on the upper layer of the honeycomb framework, the folding layer had a one-way wrinkle number of 25, and after assembly, a car air conditioner filter core was obtained.

[0162] The morphology and electron microscope image of the air purification material prepared in this example are shown in Figure 2 The particle size of the microbial colonization core of the air purification material in this example was 0.7 mm-0.9 mm, and the thickness of the coating layer was 0.4 mm-0.6 mm.

[0163] Example 2

[0164] The difference between this example and Example 1 is that in step (3), the mass percentage of N,N-methylene bisacrylamide in the pre-polymer solution is 1.5%; in step (4), the mass percentage of N,N-methylene bisacrylamide in the coating layer suspension is 3%, and the other conditions remain the same as in Example 1.

[0165] The particle size of the microbial colonization core of the air purification material in this example was 1.9 mm-2.1 mm, and the thickness of the coating layer was 1.3 mm-1.4 mm.

[0166] Example 3

[0167] The difference between this example and Example 1 is that in step (3), the mass percentage of N,N-methylene bisacrylamide in the pre-polymer solution is 0.75%; in step (4), the mass percentage of N,N-methylene bisacrylamide in the coating layer suspension is 2%, and the other conditions remain the same as in Example 1.

[0168] The particle size of the microbial colonization core of the air purification material in this embodiment is 1.4 mm-1.7 mm, the thickness of the coating layer is 0.8 mm-1.1 mm, the pore size of the microbial colonization core is 19 μm-23 μm, the porosity is 41%, the pore size of the coating layer is 70 μm-74 μm, and the porosity is 53%.

[0169] Example 4

[0170] The difference between this embodiment and Example 3 is that in step (1), the volume ratio of Bacillus subtilis bacterial solution to Pseudomonas putida bacterial solution is 2:1, and the remaining conditions remain the same as in Example 3.

[0171] Example 5

[0172] The difference between this embodiment and Example 3 is that in step (1), the volume ratio of Bacillus subtilis bacterial solution to Pseudomonas putida bacterial solution is 1:2, and the remaining conditions remain the same as in Example 3.

[0173] Example 6

[0174] The difference between this embodiment and Example 3 is that in step (3), the mass percentage of ammonium persulfate in the pre-polymer solution is 3%, and the mass percentage of sodium chloride is 7.5%; in step (4), the mass percentage of ammonium persulfate in the coating layer suspension is 7%, and the mass percentage of sodium chloride is 7.5%, to obtain an air purification material with a microbial colonization core pore size of 10 μm-15 μm and a porosity of 32%, and a coating layer pore size of 40 μm-50 μm and a porosity of 44%, and the remaining conditions remain the same as in Example 3.

[0175] Example 7

[0176] The difference between this embodiment and Example 3 is that in step (3), the mass percentage of ammonium persulfate in the pre-polymer solution is 10%, and the mass percentage of sodium chloride is 12%; in step (4), the mass percentage of ammonium persulfate in the coating layer suspension is 15%, and the mass percentage of sodium chloride is 23%, to obtain an air purification material with a microbial colonization core pore size of 24 μm-30 μm and a porosity of 47%, and a coating layer pore size of 86 μm-96 μm and a porosity of 65%, and the remaining conditions remain the same as in Example 3.

[0177] Example 8

[0178] The difference between this embodiment and Example 3 is that in step (2), the mass percentage of polylactic acid-glycolic acid copolymer is 17%, and the emulsification conditions are 7000 rpm and 15 min, to obtain a microcapsule with a wall material thickness of 12 μm-15 μm, and the remaining conditions remain the same as in Example 3.

[0179] The pore size of the microcapsules in this embodiment is 410 nm-500 nm, the wall material thickness of the microcapsules is 12 μm-15 μm, and the porosity is 36%.

[0180] Example 9

[0181] The difference between this embodiment and Example 3 is that in step (2), the mass percentage of polylactic acid-glycolic acid copolymer is 8%, and the mass ratio of the nutrient core material to the wall material solution is 1:1.5, so that the microcapsules with a wall material thickness of 5.5 μm-7 μm are obtained, and the other conditions remain the same as in Example 3.

[0182] The pore size of the microcapsules in this embodiment is 50 nm-125 nm, the wall material thickness of the microcapsules is 5.5 μm-7 μm, and the porosity is 22%.

[0183] Comparative Example 1

[0184] The folded layer is compounded, and the finished product assembly process is edge bonding. The folded layer includes non-woven fabric and H11 grade HEPA. The difference from Example 1 is that no honeycomb framework and air purification material are added.

[0185] Comparative Example 2

[0186] The folded layer is compounded, and the finished product assembly process is edge bonding. The folded layer includes non-woven fabric and H11 grade HEPA. The difference from Example 1 is that the microorganisms are directly fixed on the surface of the non-woven fabric. The preparation step is to immerse the non-woven fabric in a suspension of Bacillus subtilis and Pseudomonas putida at a volume ratio of 1:1 for 72 h, and then dry at a low temperature of 35°C to obtain a non-woven fabric loaded with microorganisms.

[0187] The purification filter cartridges in Examples 1-9 and Comparative Examples 1-2 were subjected to gaseous pollutant removal tests. The test method is as follows: the purification filter cartridges were subjected to formaldehyde and toluene gaseous pollutant removal tests on a VOC dynamic system test device. The test temperature was 23±3°C, the humidity was 60±5%, the test duration was 2400 h, the air flow rate was 1 m / s, the initial concentration of formaldehyde was 1.50 mg / m 3 , the initial concentration of toluene was 3.79 mg / m 3 , and the test results are shown in Table 1.

[0188] Table 1 Comparison of gaseous pollutant removal test results in different examples and comparative examples

[0189]

[0190]

[0191] In Table 1, “-” indicates no degradation ability for formaldehyde or toluene.

[0192] As can be seen from Table 1, by adding the air purification material provided in the embodiments of the present application to the purification filter element, the time for removing 100% of gaseous pollutants such as formaldehyde and toluene can be significantly shortened compared to Comparative Examples 1-2, and the air purification material provided in the embodiments of the present application can still maintain excellent removal effect after 2400 hours of use, significantly improving the service life and producing unexpected technical effects.

[0193] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0194] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0195] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0196] The above is only the preferred embodiments of the present application, and does not limit the present application in any form, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical solution content of the present application, still belongs to the scope of the technical solution of the present application.

Claims

1. An air purification material, characterized in that: include: a coating layer, wherein the coating layer carries microcapsules, the microcapsules comprising a wall material and a nutrient core material encapsulated in the wall material; A microbial colonization core, the microbial colonization core is coated in the coating layer, and the microbial colonization core comprises a porous substrate and gaseous pollutant degrading bacteria supported on the porous substrate; Wherein, the nutrient core material provides nutrition for the gaseous pollutant degrading bacteria.

2. The air purification material according to claim 1, characterized in that The coating layer, the microcapsule and the microorganism colonization core all have porous structures.

3. The air purification material according to claim 1, characterized in that The thickness of the coating layer is W, the pore size of the coating layer is D1, and 20≤W / D1≤50.

4. The air purification material according to claim 1, characterized in that The particle size of the air purification material is 1mm-3.5mm; and / or, the coating layer has a thickness of 0.3 mm to 1.5 mm; And / or, the particle size of the microorganism colonization kernel is 0.5 mm-2.5 mm.

5. The air purification material according to claim 1, characterized in that The pore size of the coating layer is D1, and the pore size of the microorganism colonization core is D2, where D1>D2.

6. The air purification material according to claim 5, characterized in that: The pore size of the coating layer is 40 μm-100 μm; And / or, the pore size of the microorganism colonization core is 10 μm-30 μm.

7. The air purification material according to claim 5, characterized in that: The porosity of the coating layer is 40%-65%; And / or, the porosity of the microorganism colonization core is 30%-50%.

8. The air purification material according to claim 1, characterized in that The particle size of the microcapsules is 50 μm-150 μm; and / or, the pore size of the microcapsule is 50 nm to 500 nm; and / or, the porosity of the microcapsules is 20%-40%; And / or, the thickness of the wall material is 5 μm-15 μm.

9. The air purification material according to any one of claims 1 to 8, characterized in that: The material of the coating layer includes at least one of sodium alginate, calcium alginate, chitosan, agarose, agar, cellulose, collagen, polyvinyl alcohol, polyethylene glycol, polyacrylamide, polyacrylate, polycaprolactone, polyurethane, silicone rubber, polylactic acid, polystyrene and derivative copolymers of the above substances; and / or the wall material comprises at least one of sodium alginate, calcium alginate, chitosan, agarose, agar, cellulose, collagen, polyvinyl alcohol, polyethylene glycol, polyacrylamide, polyacrylate, polycaprolactone, polyurethane, silicone rubber, polylactic acid, polystyrene, and derivative copolymers thereof; And / or, the material of the porous substrate includes at least one of sodium alginate, calcium alginate, chitosan, agarose, agar, cellulose, collagen, polyvinyl alcohol, polyethylene glycol, polyacrylamide, polyacrylate, polycaprolactone, polyurethane, silicone rubber, polylactic acid, polystyrene and derivative copolymers of the above substances.

10. The air purification material according to any one of claims 1 to 8, characterized in that: The gaseous pollutant degrading bacteria include at least one of aldehyde-degrading bacteria and benzene-degrading bacteria; The aldehyde-degrading bacteria include at least one of Bacillus subtilis, Pseudomonas aeruginosa, Pseudomonas putida, Rhodopseudomonas palustris, methylotrophic Bacillus, Alcaligenes faecalis, Lactobacillus, Phanerochaete chrysosporium, and Saccharomyces cerevisiae. And / or, the benzene series degrading bacteria include at least one of Bacillus subtilis, Bacillus cereus, Pseudomonas aeruginosa, Pseudomonas stutzeri, Pseudomonas putida, Rhodococcus etherovorans and Rhodococcus johnsonii.

11. The air purification material according to any one of claims 1 to 8, characterized in that: The loading capacity of the gaseous pollutant degrading bacteria in the air purification material is 5×10 8 CFU / mL-15×10 8 CFU / mL.

12. The air purification material according to any one of claims 1 to 8, characterized in that: The nutrient core material comprises a carbon source, a nitrogen source, inorganic salts, trace elements and growth factors.

13. The air purification material according to claim 12, characterized in that: The carbon source includes at least one of glucose, glycerol and starch hydrolysate; and / or, the nitrogen source comprises at least one of yeast extract, ammonium sulfate and L-glutamic acid; and / or, the inorganic salt comprises at least one of potassium dihydrogen phosphate, magnesium sulfate and calcium chloride; And / or, the growth factor comprises at least one of biotin and vitamin B12.

14. A method for preparing an air purification material, characterized in that: include: Provide microbial colonization cores and microcapsules; Dispersing the coating layer material and the microcapsules in a first solvent to obtain a first mixed solution; adding the microorganism colonization core into the first mixed solution, and performing a cross-linking reaction to obtain an air purification material; In which, the air purification material includes a coating layer and the microbial colonization core coated in the coating layer, the coating layer is loaded with the microcapsule, the microcapsule includes a wall material and a nutrient core material coated in the wall material, the microbial colonization core includes a porous substrate and gaseous pollutant degrading bacteria coated in the porous substrate, the nutrient core material is suitable for providing nutrition for the gaseous pollutant degrading bacteria, and the coating layer, the microcapsule and the microbial colonization core are all porous structures.

15. The method for preparing an air purification material according to claim 14, characterized in that: The preparation method of the microbial colonization kernel comprises: Dispersing the porous substrate raw material, the first cross-linking agent and the initiator in a second solvent to form a second mixed solution; The bacterial liquid of gaseous pollutant-degrading bacteria and the first porogen are added to the second mixed liquid, cross-linked and solidified to obtain the microorganism colonization core.

16. The method for preparing an air purification material according to claim 15, characterized in that: The first cross-linking agent comprises at least one of N,N-methylenebispropionamide, calcium chloride, barium chloride, zinc chloride, glutaraldehyde, epichlorohydrin, boric acid, carbodiimide, ethylene glycol dimethacrylate and divinylbenzene; and / or, the initiator comprises at least one of ammonium persulfate, benzoyl peroxide and azobisisobutyronitrile; And / or, the first porogen includes at least one of sodium chloride, potassium chloride, starch, ammonium bicarbonate and azodicarbonamide.

17. The method for preparing an air purification material according to claim 14, wherein: The preparation method of the microcapsule comprises: Provides nutritional core material; dispersing the wall material raw material into a third solvent to form a third mixed solution; The nutrient core material is added to the third mixed solution, and the microcapsules are obtained through emulsification and centrifugation.

18. The method for preparing an air purification material according to claim 14, wherein: The step of dispersing the coating layer material and the microcapsules into a first solvent to obtain a first mixed solution comprises: adding the coating layer material and the second porogen into the first solvent to obtain a fourth mixed solution; The microcapsules are added into the fourth mixed solution to obtain the first mixed solution.

19. The method for preparing an air purification material according to claim 18, wherein: The microorganism colonization core is added to the first mixed solution, and after cross-linking reaction, an air purification material is obtained, comprising: adding the microbial colonization cores to the first mixed solution to form pre-coated particles; The pre-coated particles are added to a second cross-linking agent solution to undergo a cross-linking reaction to obtain the air purification material.

20. A purification filter element, characterized in that: The invention comprises the air purification material according to any one of claims 1 to 13, and / or the air purification material prepared by the preparation method of the air purification material according to any one of claims 14 to 19.

21. An air conditioning system, characterized in that: Comprising the purification filter element as described in claim 20.

22. A vehicle, characterized in that: Comprising the air conditioning system of claim 21.

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