Long-acting slow-release sterilizing and antioxidant filter element material and preparation method thereof

Abstract

The invention belongs to the technical field of filter elements, and particularly discloses a long-acting slow-release type sterilization and anti-oxidation filter element material and a preparation method thereof.The sepiolite is pretreated, so that the performance of the sepiolite is activated, the surface of the sepiolite is grafted with multiple functional groups, then the sepiolite is treated with a pore forming agent and an etching agent, the pore structure of the sepiolite is enriched, and the service life of the sepiolite is prolonged; compared with the prior art, the composite material disclosed by the invention has the advantages that the composite material can generate larger and more hierarchical pore structures, then through loading and adsorption of graphene oxide and grafting of chitosan, the antibacterial effect is effectively improved, meanwhile, the composite material has excellent slow-release effect and anti-oxidation effect, and the shelf life can be effectively prolonged, so that the composite material has excellent antibacterial stability.

Description

Technical Field

[0001] The present invention relates to the technical field of filter elements, and particularly relates to a long-acting slow-release bactericidal and antioxidant filter element material and a preparation method thereof. Background Art

[0002] With the rapid development of the automotive industry and the continuous improvement of people's requirements for the air quality inside vehicles, as an important component to ensure the cleanliness of the air inside vehicles, the performance requirements for automotive air-conditioning filter elements are also getting higher and higher. Although existing filter element materials have certain filtering performance, they lack effective bactericidal functions and cannot prevent the growth of microorganisms or eliminate harmful oxides in the air.

[0003] With the improvement of the requirements for the air quality inside vehicles, it has become particularly important to develop an air-conditioning filter element material that can have long-acting bactericidal effects. At the same time, the material needs to have good durability and long-term performance to reduce the replacement frequency.

[0004] In view of this, the present application is proposed. Summary of the Invention

[0005] The present invention provides a long-acting slow-release bactericidal and antioxidant filter element material and a preparation method thereof, which have excellent antibacterial properties and antibacterial stability.

[0006] The present invention solves its technical problems by adopting the following technical solutions: A preparation method of a long-acting slow-release bactericidal and antioxidant filter element material includes the following steps: (1) Adding sepiolite, oxalic acid, citric acid, and an amino-silane coupling agent to water, stirring evenly, and drying to obtain modified sepiolite; (2) Adding the modified sepiolite and a pore-forming agent to an etching agent solution, stirring evenly to obtain a mixed solution; (3) Adding graphene oxide to the mixed solution, and then adding ascorbic acid, stirring evenly to obtain a precursor solution; (4) Adding chitosan, a vinyl-silane coupling agent, and acetone to water, stirring evenly to obtain a modified solution; (5) Adding the modified solution to the precursor solution, stirring evenly, performing ultrasonic treatment, filtering, washing, and drying to obtain a long-acting slow-release bactericidal and antioxidant filter element material.

[0007] The present invention creatively pre-treats sepiolite to activate its performance and grafts various functional groups on its surface. Then, it is treated with a pore-forming agent and an etching agent to enrich the pore structure of sepiolite, generating larger and more hierarchical pore structures. Then, through the loading and adsorption of graphene oxide and the grafting of chitosan, the antibacterial effect is effectively improved, and at the same time, it has excellent slow-release effects and antioxidant effects, which can effectively extend the shelf life, thereby exerting excellent antibacterial stability.

[0008] As a preferred embodiment of the present invention, the mass ratio of sepiolite, oxalic acid, citric acid, amino-silane coupling agent, and water is 1:(0.02~0.06):(0.02~0.06):(0.02~0.05):(4~10).

[0009] As a preferred embodiment of the present invention, the amino-silane coupling agent is at least one of γ-aminopropyltriethoxysilane, γ-aminopropyltrimethoxysilane, γ-aminopropylmethyldiethoxysilane, and γ-aminopropylmethyldimethoxysilane.

[0010] As a preferred embodiment of the present invention, the mass ratio of the modified sepiolite, pore-forming agent, and etching agent solution is 1:(0.08~0.12):(2~6).

[0011] As a preferred embodiment of the present invention, the pore-forming agent is zinc oxide; The etching agent solution includes a phosphoric acid solution and a nitric acid solution, and the mass ratio of the phosphoric acid solution to the nitric acid solution is 1:(0.5~2); the molar concentration of the phosphoric acid solution is 0.5~2 mol / L, and the molar concentration of the nitric acid solution is 0.5~2 mol / L.

[0012] As a preferred embodiment of the present invention, the mass ratio of graphene oxide, mixed solution, and ascorbic acid is (0.05~0.1):1:(0.05~0.1).

[0013] As a preferred embodiment of the present invention, the mass ratio of chitosan, vinyl-silane coupling agent, acetone, and water is 1:(0.02~0.05):(0.2~0.6):(4~10).

[0014] As a preferred embodiment of the present invention, the vinyl-silane coupling agent is at least one of vinyltriethoxysilane, vinyltrimethoxysilane, and vinyltriisopropoxysilane.

[0015] As a preferred embodiment of the present invention, the mass ratio of the modification solution to the precursor solution is 1:(4~6).

[0016] The present invention also provides a long-acting slow-release bactericidal and antioxidant filter element material, which is prepared by using the above-mentioned preparation method.

[0017] Advantages of the present invention: The present invention pre-treats sepiolite to activate its properties, grafts various functional groups on the surface, and then treats it with a pore-forming agent and an etching agent to enrich the pore structure of sepiolite, generating larger and more hierarchical pore structures. Then, through the loading and adsorption of graphene oxide and the grafting of chitosan, the antibacterial effect is effectively improved, and at the same time, it has excellent slow-release effect and antioxidant effect, which can effectively extend the shelf life, thereby exerting excellent antibacterial stability. Detailed implementation manners

[0018] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] In the present invention, among the technically characterized described in an open manner, it includes a closed technical solution composed of the listed features, and also includes an open technical solution containing the listed features.

[0020] In the present invention, regarding the numerical range, unless otherwise specified, the above numerical range is regarded as continuous, and includes the minimum value and the maximum value of the range, as well as each value between such minimum value and maximum value. Further, when the range refers to an integer, it includes each integer between the minimum value and the maximum value of the range. In addition, when providing multiple ranges to describe features or characteristics, the ranges can be combined. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all sub-ranges subsumed therein.

[0021] In the present invention, there is no particular limitation on the specific dispersion and stirring treatment methods.

[0022] For the reagents or instruments used in the present invention that are not specified by the manufacturer, they are all conventional products that can be obtained through commercial purchase. The raw materials used in each comparative example and the raw materials used in the parallel experiments of each embodiment are the same commercially available products unless otherwise specified.

[0023] Example 1 A preparation method of a long-acting slow-release bactericidal and antioxidant filter element material, comprising the following steps: (1) Add sepiolite, oxalic acid, citric acid, and γ-aminopropyltriethoxysilane to water, stir evenly at a speed of 200 rpm, and dry to obtain modified sepiolite; the mass ratio of sepiolite, oxalic acid, citric acid, γ-aminopropyltriethoxysilane, and water is 1:0.05:0.05:0.04:5.

[0024] (2) Add the modified sepiolite and zinc oxide to the etching agent solution, stir evenly to obtain a mixed solution; the mass ratio of the modified sepiolite, zinc oxide, and etching agent solution is 1:0.1:4; the etching agent solution includes 1 mol / L phosphoric acid solution and 1 mol / L nitric acid solution, and the mass ratio of the phosphoric acid solution to the nitric acid solution is 1:1; (3) Add graphene oxide to the mixed solution, then add ascorbic acid, stir evenly to obtain a precursor solution; the mass ratio of the graphene oxide, mixed solution, and ascorbic acid is 0.08:1:0.08.

[0025] (4) Add chitosan, vinyltriethoxysilane, and acetone to water, stir evenly to obtain a modified solution; the mass ratio of the chitosan, vinyl silane coupling agent, acetone, and water is 1:0.04:0.5:5.

[0026] (5) Add the modified solution to the precursor solution, stir evenly, perform ultrasonic treatment at 500 W for 25 min, filter, wash, and dry to obtain a long-acting slow-release bactericidal and antioxidant filter element material. The mass ratio of the modified solution to the precursor solution is 1:5.

[0027] Example 2 A preparation method of a long-acting slow-release bactericidal and antioxidant filter element material, comprising the following steps: (1) Add sepiolite, oxalic acid, citric acid, and γ-aminopropyltriethoxysilane to water, stir evenly at a rotation speed of 200 rpm, and dry to obtain modified sepiolite; the mass ratio of the sepiolite, oxalic acid, citric acid, γ-aminopropyltriethoxysilane, and water is 1:0.02:0.06:0.02:10.

[0028] (2) Add the modified sepiolite and zinc oxide to the etching agent solution, stir evenly to obtain a mixed solution; the mass ratio of the modified sepiolite, zinc oxide, and etching agent solution is 1:0.1:4; the etching agent solution includes 1 mol / L phosphoric acid solution and 1 mol / L nitric acid solution, and the mass ratio of the phosphoric acid solution to the nitric acid solution is 1:1; (3) Add graphene oxide to the mixed solution, then add ascorbic acid, stir evenly to obtain a precursor solution; the mass ratio of the graphene oxide, mixed solution, and ascorbic acid is 0.08:1:0.08.

[0029] (4) Add chitosan, vinyltriethoxysilane, and acetone to water, stir evenly to obtain a modified solution; the mass ratio of the chitosan, vinyl silane coupling agent, acetone, and water is 1:0.04:0.5:5.

[0030] (5) Add the modified liquid to the precursor liquid, stir evenly, perform ultrasonic treatment at 500 W for 25 min, filter, wash, and dry to obtain the long-acting slow-release bactericidal and antioxidant filter element material. The mass ratio of the modified liquid to the precursor liquid is 1:5.

[0031] Example 3 A preparation method of a long-acting slow-release bactericidal and antioxidant filter element material, comprising the following steps: (1) Add sepiolite, oxalic acid, citric acid, and γ-aminopropyltriethoxysilane to water, stir evenly at a rotation speed of 200 rpm, and dry to obtain modified sepiolite; the mass ratio of sepiolite, oxalic acid, citric acid, γ-aminopropyltriethoxysilane, and water is 1:0.06:0.02:0.05:4.

[0032] (2) Add the modified sepiolite and zinc oxide to the etching agent solution, stir evenly to obtain a mixed solution; the mass ratio of the modified sepiolite, zinc oxide, and the etching agent solution is 1:0.1:4; the etching agent solution includes 1 mol / L phosphoric acid solution and 1 mol / L nitric acid solution, and the mass ratio of the phosphoric acid solution to the nitric acid solution is 1:1; (3) Add graphene oxide to the mixed solution, and then add ascorbic acid, stir evenly to obtain a precursor liquid; the mass ratio of graphene oxide, the mixed solution, and ascorbic acid is 0.08:1:0.08.

[0033] (4) Add chitosan, vinyltriethoxysilane, and acetone to water, stir evenly to obtain a modified liquid; the mass ratio of chitosan, vinyl silane coupling agent, acetone, and water is 1:0.04:0.5:5.

[0034] (5) Add the modified liquid to the precursor liquid, stir evenly, perform ultrasonic treatment at 500 W for 25 min, filter, wash, and dry to obtain the long-acting slow-release bactericidal and antioxidant filter element material. The mass ratio of the modified liquid to the precursor liquid is 1:5.

[0035] Example 4 A preparation method of a long-acting slow-release bactericidal and antioxidant filter element material, comprising the following steps: (1) Add sepiolite, oxalic acid, citric acid, and γ-aminopropyltriethoxysilane to water, stir evenly at a rotation speed of 200 rpm, and dry to obtain modified sepiolite; the mass ratio of sepiolite, oxalic acid, citric acid, γ-aminopropyltriethoxysilane, and water is 1:0.05:0.05:0.04:5.

[0036] (2) Add the modified sepiolite and zinc oxide into the etching solution, stir evenly to obtain a mixed solution; the mass ratio of the modified sepiolite, zinc oxide, and etching solution is 1:0.1:4; the etching solution includes 1 mol / L phosphoric acid solution and 1 mol / L nitric acid solution, and the mass ratio of the phosphoric acid solution to the nitric acid solution is 1:1; (3) Add graphene oxide into the mixed solution, and then add ascorbic acid, stir evenly to obtain a precursor solution; the mass ratio of the graphene oxide, mixed solution, and ascorbic acid is 0.08:1:0.08.

[0037] (4) Add chitosan, vinyltriethoxysilane, and acetone into water, stir evenly to obtain a modified solution; the mass ratio of the chitosan, vinyl silane coupling agent, acetone, and water is 1:0.02:0.6:4.

[0038] (5) Add the modified solution into the precursor solution, stir evenly, perform ultrasonic treatment at 500 W for 25 min, filter, wash, and dry to obtain a long-acting slow-release bactericidal and antioxidant filter element material. The mass ratio of the modified solution to the precursor solution is 1:5.

[0039] Example 5 A preparation method of a long-acting slow-release bactericidal and antioxidant filter element material, comprising the following steps: (1) Add sepiolite, oxalic acid, citric acid, and γ-aminopropyltriethoxysilane into water, stir evenly at a rotation speed of 200 rpm, and dry to obtain modified sepiolite; the mass ratio of the sepiolite, oxalic acid, citric acid, γ-aminopropyltriethoxysilane, and water is 1:0.05:0.05:0.04:5.

[0040] (2) Add the modified sepiolite and zinc oxide into the etching solution, stir evenly to obtain a mixed solution; the mass ratio of the modified sepiolite, zinc oxide, and etching solution is 1:0.1:4; the etching solution includes 1 mol / L phosphoric acid solution and 1 mol / L nitric acid solution, and the mass ratio of the phosphoric acid solution to the nitric acid solution is 1:1; (3) Add graphene oxide into the mixed solution, and then add ascorbic acid, stir evenly to obtain a precursor solution; the mass ratio of the graphene oxide, mixed solution, and ascorbic acid is 0.08:1:0.08.

[0041] (4) Add chitosan, vinyltriethoxysilane, and acetone into water, stir evenly to obtain a modified solution; the mass ratio of the chitosan, vinyl silane coupling agent, acetone, and water is 1:0.05:0.2:4.

[0042] (5) Add the modified liquid to the precursor liquid, stir evenly, perform ultrasonic treatment at 500 W for 25 min, filter, wash, and dry to obtain a long-acting slow-release bactericidal and antioxidant filter element material. The mass ratio of the modified liquid to the precursor liquid is 1:5.

[0043] Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that the sepiolite in Comparative Example 1 was not modified, and the others were the same.

[0044] A preparation method of a long-acting slow-release bactericidal and antioxidant filter element material includes the following steps: (1) Add sepiolite and zinc oxide to the etching agent solution, stir evenly to obtain a mixed solution; the mass ratio of the sepiolite, zinc oxide, and etching agent solution is 1:0.1:4; the etching agent solution includes 1 mol / L phosphoric acid solution and 1 mol / L nitric acid solution, and the mass ratio of the phosphoric acid solution to the nitric acid solution is 1:1; (2) Add graphene oxide to the mixed solution, then add ascorbic acid, stir evenly to obtain a precursor liquid; the mass ratio of the graphene oxide, mixed solution, and ascorbic acid is 0.08:1:0.08.

[0045] (3) Add chitosan, vinyltriethoxysilane, and acetone to water, stir evenly to obtain a modified liquid; the mass ratio of the chitosan, vinyl silane coupling agent, acetone, and water is 1:0.04:0.5:5.

[0046] (4) Add the modified liquid to the precursor liquid, stir evenly, perform ultrasonic treatment at 500 W for 25 min, filter, wash, and dry to obtain a long-acting slow-release bactericidal and antioxidant filter element material. The mass ratio of the modified liquid to the precursor liquid is 1:5.

[0047] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that the chitosan in Comparative Example 2 was not treated, and the others were the same.

[0048] A preparation method of a long-acting slow-release bactericidal and antioxidant filter element material includes the following steps: (1) Add sepiolite, oxalic acid, citric acid, and γ-aminopropyltriethoxysilane to water, stir evenly at a rotation speed of 200 rpm, and dry to obtain modified sepiolite; the mass ratio of the sepiolite, oxalic acid, citric acid, γ-aminopropyltriethoxysilane, and water is 1:0.05:0.05:0.04:5.

[0049] (2) Add the modified sepiolite and zinc oxide into the etching agent solution, stir evenly to obtain a mixed solution; the mass ratio of the modified sepiolite, zinc oxide, and etching agent solution is 1:0.1:4; the etching agent solution includes 1 mol / L phosphoric acid solution and 1 mol / L nitric acid solution, and the mass ratio of the phosphoric acid solution to the nitric acid solution is 1:1; (3) Add graphene oxide into the mixed solution, then add ascorbic acid, stir evenly to obtain a precursor solution; the mass ratio of the graphene oxide, mixed solution, and ascorbic acid is 0.08:1:0.08.

[0050] (4) Add chitosan and acetone into water, stir evenly to obtain a modified solution; the mass ratio of the chitosan, acetone, and water is 1:0.04:0.5:5.

[0051] (5) Add the modified solution into the precursor solution, stir evenly, perform ultrasonic treatment at 500 W for 25 min, filter, wash, and dry to obtain a long-acting slow-release bactericidal and antioxidant filter element material. The mass ratio of the modified solution to the precursor solution is 1:5.

[0052] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is that Comparative Example 3 did not undergo pore formation and etching, and the others are the same.

[0053] A preparation method of a long-acting slow-release bactericidal and antioxidant filter element material, comprising the following steps: (1) Add sepiolite, oxalic acid, citric acid, and γ-aminopropyltriethoxysilane into water, stir evenly at a speed of 200 rpm, and dry to obtain modified sepiolite; the mass ratio of the sepiolite, oxalic acid, citric acid, γ-aminopropyltriethoxysilane, and water is 1:0.05:0.05:0.04:5.

[0054] (2) Add graphene oxide into the mixed solution, then add ascorbic acid, stir evenly to obtain a precursor solution; the mass ratio of the graphene oxide, mixed solution, and ascorbic acid is 0.08:1:0.08.

[0055] (3) Add chitosan, vinyltriethoxysilane, and acetone into water, stir evenly to obtain a modified solution; the mass ratio of the chitosan, vinyl silane coupling agent, acetone, and water is 1:0.04:0.5:20.

[0056] (4) Add the modified sepiolite into the modified solution, stir evenly, perform ultrasonic treatment at 500 W for 25 min, filter, wash, and dry to obtain a long-acting slow-release bactericidal and antioxidant filter element material. The mass ratio of the modified sepiolite to the modified solution is 1:5.

[0057] Comparative Example 4 The difference between Comparative Example 4 and Example 1 is that graphene oxide was not added in Comparative Example 4, and the others were the same.

[0058] A preparation method of a long-acting slow-release bactericidal and antioxidant filter element material includes the following steps: (1) Add sepiolite, oxalic acid, citric acid, and γ-aminopropyltriethoxysilane to water, stir evenly at a speed of 200 rpm, and dry to obtain modified sepiolite; the mass ratio of sepiolite, oxalic acid, citric acid, γ-aminopropyltriethoxysilane, and water is 1:0.05:0.05:0.04:5.

[0059] (2) Add the modified sepiolite and zinc oxide to the etching solution, stir evenly to obtain a mixed solution; the mass ratio of the modified sepiolite, zinc oxide, and etching solution is 1:0.1:4; the etching solution includes 1 mol / L phosphoric acid solution and 1 mol / L nitric acid solution, and the mass ratio of the phosphoric acid solution to the nitric acid solution is 1:1; (3) Add chitosan, vinyltriethoxysilane, and acetone to water, stir evenly to obtain a modified solution; the mass ratio of chitosan, vinyl silane coupling agent, acetone, and water is 1:0.04:0.5:5.

[0060] (5) Add the modified solution to the mixed solution, stir evenly, perform ultrasonic treatment at 500 W for 25 min, filter, wash, and dry to obtain a long-acting slow-release bactericidal and antioxidant filter element material. The mass ratio of the modified solution to the mixed solution is 1:5.

[0061] Comparative Example 5 The difference between Comparative Example 5 and Example 1 is that chitosan was not added in Comparative Example 5, and the others were the same.

[0062] A preparation method of a long-acting slow-release bactericidal and antioxidant filter element material includes the following steps: (1) Add sepiolite, oxalic acid, citric acid, and γ-aminopropyltriethoxysilane to water, stir evenly at a speed of 200 rpm, and dry to obtain modified sepiolite; the mass ratio of sepiolite, oxalic acid, citric acid, γ-aminopropyltriethoxysilane, and water is 1:0.05:0.05:0.04:5.

[0063] (2) Add the modified sepiolite and zinc oxide to the etching solution, stir evenly to obtain a mixed solution; the mass ratio of the modified sepiolite, zinc oxide, and etching solution is 1:0.1:4; the etching solution includes 1 mol / L phosphoric acid solution and 1 mol / L nitric acid solution, and the mass ratio of the phosphoric acid solution to the nitric acid solution is 1:1; (3) Add graphene oxide to the mixed solution, then add ascorbic acid, stir evenly to obtain a precursor solution, filter, wash, and dry to obtain a long-acting slow-release bactericidal and antioxidant filter element material. The mass ratio of the graphene oxide, the mixed solution, and the ascorbic acid is 0.08:1:0.08.

[0064] Test Example The immediate antibacterial rates of the examples and comparative examples and the antibacterial rates after being placed at 25°C for 6 months are shown in Table 1.

[0065] Table 1

[0066] It can be seen from Table 1 that the filter element material described in the present invention has excellent antibacterial performance and lasting antibacterial stability.

[0067] Finally, it should be noted that the above embodiments are used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A method for preparing a long-acting sustained-release bactericidal and antioxidant filter element material, characterized in that: The following steps are involved: (1) Adding sepiolite, oxalic acid, citric acid and aminosilane coupling agent into water, stirring evenly, and drying to obtain modified sepiolite; (2) adding the modified sepiolite and the pore-forming agent into the etchant solution and stirring evenly to obtain a mixed solution; (3) adding graphene oxide to the mixed solution, then adding ascorbic acid, stirring evenly to obtain a precursor solution; (4) adding chitosan, vinyl silane coupling agent and acetone into water and stirring evenly to obtain a modified solution; (5) Adding the modified liquid to the precursor liquid, stirring evenly, ultrasonically treating, filtering, washing and drying, to obtain a long-acting sustained-release bactericidal and antioxidant filter element material.

2. The method for preparing the long-acting sustained-release bactericidal and antioxidant filter element material according to claim 1, characterized in that: The mass ratio of the sepiolite, oxalic acid, citric acid, aminosilane coupling agent and water is 1: (0.02-0.06): (0.02-0.06): (0.02-0.05): (4-10).

3. The method for preparing the long-acting sustained-release bactericidal and antioxidant filter element material according to claim 1, characterized in that: The aminosilane coupling agent is at least one of γ-aminopropyltriethoxysilane, γ-aminopropyltrimethoxysilane, γ-aminopropylmethyldiethoxysilane and γ-aminopropylmethyldimethoxysilane.

4. The method for preparing the long-acting sustained-release bactericidal and antioxidant filter element material according to claim 1, characterized in that: The mass ratio of the modified sepiolite, pore former and etchant solution is 1:(0.08-0.12):(2-6).

5. The method for preparing the long-acting sustained-release bactericidal and antioxidant filter element material according to claim 1, characterized in that: The pore-forming agent is zinc oxide; The etchant solution includes a phosphoric acid solution and a nitric acid solution, the mass ratio of the phosphoric acid solution to the nitric acid solution is 1:(0.5-2); the molar concentration of the phosphoric acid solution is 0.5-2 mol / L, and the molar concentration of the nitric acid solution is 0.5-2 mol / L.

6. The method for preparing the long-acting sustained-release bactericidal and antioxidant filter element material according to claim 1, characterized in that: The mass ratio of the graphene oxide, the mixed solution and ascorbic acid is (0.05-0.1):1:(0.05-0.1).

7. The method for preparing the long-acting sustained-release bactericidal and antioxidant filter element material according to claim 1, characterized in that: The mass ratio of the chitosan, the vinyl silane coupling agent, the acetone and the water is 1: (0.02-0.05): (0.2-0.6): (4-10).

8. The method for preparing the long-acting sustained-release bactericidal and antioxidant filter element material according to claim 1, characterized in that: The vinyl silane coupling agent is at least one of vinyl triethoxy silane, vinyl trimethoxy silane and vinyl triisopropoxy silane.

9. The method for preparing the long-acting sustained-release bactericidal and antioxidant filter element material according to claim 1, characterized in that: The mass ratio of the modifying liquid to the precursor liquid is 1:(4-6).

10. A long-acting sustained-release bactericidal and antioxidant filter material, characterized in that: The method is prepared by any one of claims 1 to 9.

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