An odor and formaldehyde removing dispersion liquid and its preparation method

Abstract

The present application discloses an odor and formaldehyde removal dispersion liquid and a preparation method thereof, belonging to the technical field of environmental protection products. The odor and formaldehyde removal dispersion liquid comprises the following components: porous active particles: 5-10 wt%; nano-cluster copper: 0.01-0.02 wt%; antibacterial metal complex: 1-3 wt%; organic solvent: 3-5 wt%; dispersant: 0.1-0.3 wt%; surfactant: 0.05-0.1 wt%; and the balance is water. Through multiple composites such as micro-nano porous materials, titanium dioxide, nano-cluster copper particles, and metal complexes, the functions of odor and formaldehyde removal by physical adsorption and chemical decomposition are realized. The prepared odor and formaldehyde removal dispersion liquid can be applied in products such as odor and formaldehyde removal coatings, sprays, finishing agents, etc. to achieve outstanding functions.

Description

Technical Field

[0001] The present application relates to an odor and formaldehyde removal dispersion liquid and a preparation method thereof, belonging to the technical field of environmental protection products. Background Art

[0002] The concept of environmentally friendly, healthy and safe life has long been deeply rooted in people's hearts. There are high requirements for odor and formaldehyde removal in indoor furniture, decoration, new cars, etc. At the same time, there are also many odor removal requirements for odors in life, such as cigarette smell, kitchen waste, toilet smell, etc. Odors are often accompanied by the metabolism of bacteria and germs, which also pose a threat to people's physical health. In terms of odor and formaldehyde removal materials, a lot of research and development have been carried out.

[0003] Chinese Patent CN108434954A discloses a multifunctional formaldehyde and odor removal agent, which realizes the functions of antibacterial and formaldehyde removal through effective components such as cypress essential oil, modified parachlorometaxylenol, tea tree essential oil, blue cypress essential oil, and N-ethyl-N soy-based ethyl sulfate marlin. Chinese Patent CN110743357A discloses a formaldehyde removal liquid containing a bioenzyme additive, which realizes its functions through photocatalysts such as nano-titanium dioxide and nano-zinc oxide, bioenzyme additives, composite resin and additive components. Chinese Patent CN110947289A discloses a nano-bactericidal odor removal agent, which realizes the functions of slow-release sterilization and formaldehyde removal through modified zeolite adsorbed nano-titanium dioxide and nano-silver. On the basis of these studies, the current odor and formaldehyde removal functions not only focus on functional effectiveness, but also on long-term effectiveness and stability. Organic compound components such as plant essential oils and bioenzymes have good odor and formaldehyde removal functions, but they often cannot be stable for a long time under the action of light and heat; inorganic nano materials have great advantages in stably exerting functions. The combination of organic and inorganic is also the current trend of material development. High-stability organic materials are efficiently compounded with inorganic nano particles, which is expected to achieve outstanding functional effects. Summary of the Invention

[0004] According to one aspect of the present application, an odor and formaldehyde removal dispersion liquid is provided, which realizes the functions of odor and formaldehyde removal by physical adsorption and chemical decomposition through multiple composites such as micro-nano porous materials, titanium dioxide, nano-cluster copper particles, and metal complexes. The prepared odor and formaldehyde removal dispersion liquid can be applied in products such as odor and formaldehyde removal coatings, sprays, and finishing agents to achieve outstanding functions.

[0005] The odor and formaldehyde removal dispersion liquid described in the present application includes the following components:

[0006] Porous active particles: 5-10wt%;

[0007] Nano-cluster copper: 0.01-0.02wt%;

[0008] Antibacterial metal complex: 1-3 wt%;

[0009] Organic solvent: 3-5 wt%;

[0010] Dispersant: 0.1-0.3 wt%;

[0011] Surfactant: 0.05-0.1 wt%;

[0012] The balance is water.

[0013] Optionally, the porous active particles are zeolite particles loaded with titanium dioxide.

[0014] Optionally, the particle size of the porous active particles is 1-3 μm.

[0015] Optionally, the particle size of the nanocluster copper is 100-200 nm.

[0016] Optionally, the antibacterial metal complex is a chitosan zinc complex and a chitosan copper complex.

[0017] Optionally, in the chitosan zinc complex and the chitosan copper complex, the molecular weight of chitosan is 100000-150000 g / mol, and the degree of deacetylation is 80-85%.

[0018] Optionally, the dispersant is polyvinylpyrrolidone.

[0019] Optionally, the surfactant is sorbitan fatty acid ester.

[0020] Optionally, the organic solvent is isopropyl alcohol.

[0021] Optionally, the surfactant is sorbitan fatty acid ester.

[0022] Optionally, the preparation method of the porous active particles comprises the following steps:

[0023] (1) Mix absolute ethanol, hydrochloric acid and deionized water to obtain solution A;

[0024] (2) Mix zeolite particles, absolute ethanol and tetrabutyl titanate to obtain solution B;

[0025] (3) Mix solution A and solution B;

[0026] (4) Filter, wash, dry under vacuum and calcine.

[0027] Optionally, in step (1), the volume ratio of absolute ethanol, hydrochloric acid and deionized water is (200-300):(2-4):(5-8).

[0028] Optionally, in the step (2), the addition ratio of zeolite particles, absolute ethanol, and tetrabutyl titanate is (5 - 10) g : (255 - 380) mL : (15 - 20) g.

[0029] Optionally, in the step (1), the volume ratio of hydrochloric acid to absolute ethanol in the step (2) is (2 - 4) : (255 - 380).

[0030] Optionally, the step (3) includes: adding solution A to solution B at a rate of 5 - 10 ml / min.

[0031] Optionally, in the step (4), the calcination temperature is 400 - 500 °C, and the calcination time is 4 - 6 h.

[0032] Optionally, in the step (4), the temperature of vacuum drying is 60 - 80 °C.

[0033] Optionally, the preparation method of the porous active particles includes the following steps:

[0034] (1) According to the volume ratio, fully mix 200 - 300 parts of absolute ethanol, 2 - 4 parts of hydrochloric acid, and 5 - 8 parts of deionized water to obtain solution A.

[0035] (2) Immerse 5 - 10 parts by weight of zeolite particles in 200 - 300 parts by volume of absolute ethanol, ultrasonicate, let stand for 24 h, dissolve 15 - 20 parts by weight of tetrabutyl titanate in 55 - 80 parts by volume of absolute ethanol, and then add it thereto, ultrasonicate for 10 - 30 min to form solution B;

[0036] (3) Add solution A to solution B at 5 - 10 ml / min, and stir at 40 - 50 °C for 1 - 3 h.

[0037] (4) Filter and wash, vacuum dry at 60 - 80 °C, and calcine at 400 - 500 °C for 4 - 6 h.

[0038] Optionally, the preparation method of the antibacterial metal complex includes the following steps:

[0039] (I) Mix chitosan, weak acid, organic zinc salt, and organic copper salt to obtain mixture 1;

[0040] (II) Mix mixture 1 and a nonionic surfactant, and adjust the pH to 6.5 - 7.5 to obtain mixture 2;

[0041] (III) Mix mixture 2 and an aqueous glutaraldehyde solution, centrifuge, wash, and vacuum dry.

[0042] Optionally, the mass ratio of the chitosan, weak acid, organic zinc salt, and organic copper salt is (1 - 3):(150 - 400):(3.5 - 8.4):(1.9 - 4.8).

[0043] Optionally, the molecular weight of the chitosan is 100,000 - 150,000 g / mol, and the degree of deacetylation is 80 - 85%.

[0044] Optionally, the mass ratio of the non-ionic surfactant and chitosan is (0.01 - 0.03):(1 - 3).

[0045] Optionally, the weak acid is acetic acid.

[0046] Optionally, the organic zinc salt is zinc acetate.

[0047] Optionally, the organic copper salt is copper acetate.

[0048] Optionally, the non-ionic surfactant is sorbitan fatty acid ester.

[0049] Optionally, the concentration of the glutaraldehyde aqueous solution is 20 - 30 wt%; preferably, the concentration of the glutaraldehyde aqueous solution is 25 wt%.

[0050] Optionally, the mass ratio of the glutaraldehyde aqueous solution and chitosan is (0.5 - 1):(1 - 3).

[0051] Optionally, in the preparation method of the antibacterial metal complex, the step (III) includes: dropwise adding the glutaraldehyde aqueous solution to the mixture 2, and the dropwise adding method is to add 1 drop of the glutaraldehyde aqueous solution every 20 - 30 s.

[0052] Optionally, the preparation method of the antibacterial metal complex includes the following steps:

[0053] (I) According to the mass ratio, dissolve 1 - 3 parts of chitosan in 150 - 400 parts of acetic acid, add 3.5 - 8.4 parts of zinc acetate and 1.9 - 4.8 parts of copper acetate to the solution, and stir for 0.5 - 1 h.

[0054] (II) Add 0.01 - 0.03 parts of sorbitan fatty acid ester, add ammonia water until the pH is 6.5 - 7.5, stir and reflux at 70 - 75 °C for 5 - 8 h, and then cool to room temperature.

[0055] (III) Dropwise add 0.5 - 1 part of 25 wt% glutaraldehyde aqueous solution, and stir for 1 - 3 h. After centrifugation and washing, dry in vacuum at 60 - 80 °C.

[0056] On the other hand, the present application provides a method for preparing the odor-removing and formaldehyde-removing dispersion liquid, which includes: mixing porous active particles, nano-cluster copper, antibacterial metal complex, organic solvent, dispersant, surfactant, and water to obtain the dispersion liquid.

[0057] Optionally, the method for preparing the odor-removing and formaldehyde-removing dispersion liquid includes the following steps:

[0058] (a) Mix the porous active particles and nano-cluster copper with Solution 1 to obtain Solution a;

[0059] (b) Mix the antibacterial metal complex, sorbitan fatty acid ester, and the remaining water to obtain Solution b;

[0060] (c) Mix Solution a and Solution b and pass through a sieve.

[0061] Optionally, in step (c), pass through a 200-mesh sieve.

[0062] Optionally, Solution 1 includes a dispersant, an organic solvent, and Water I, and the mass ratio of the organic solvent to Water I is 1:(9 - 11); preferably, the mass ratio of the organic solvent to Water I is 1:10.

[0063] The odor-removing and formaldehyde-removing dispersion liquid of the present application can be applied in products such as odor-removing and formaldehyde-removing coatings, sprays, finishing agents, etc. to achieve outstanding functions.

[0064] The beneficial effects that the present application can produce include:

[0065] (1) The inventors found in the research on the odor-removing and formaldehyde-removing dispersion liquid that the dispersion liquid was unstable, which in turn affected its odor-removing and formaldehyde-removing properties. However, by simply changing the types of the dispersant and the surfactant, the inventors still could not effectively solve the stability of the dispersion liquid, and there was still no improvement in odor-removing and formaldehyde-removing. In subsequent research, the inventors found that by controlling the particle size of zeolite, the molecular weight and degree of deacetylation of chitosan, and at the same time controlling the reaction of the porous active particles and the antibacterial metal complex, the problem of the instability of the dispersion liquid was solved, and the odor-removing and formaldehyde-removing properties were significantly improved. The possible reason is that by controlling the particle size of zeolite and the reaction of the porous active particles, the size of titanium dioxide particles and the crystal distribution after subsequent calcination can be regulated; at the same time, by controlling the molecular weight and degree of deacetylation of chitosan, and the reaction of the antibacterial metal complex, the coordination of chitosan and metal ions is in an appropriate state, and at the same time, the obtained chitosan with a cross-linked network structure can exist uniformly and stably in the solution with the porous active particles and nano-cluster copper, improving the odor-removing and formaldehyde-removing properties and solving the problem that organic particles and inorganic particles cannot be balanced and stable.

[0066] (2)The deodorizing and formaldehyde-removing dispersion liquid prepared in this application incorporates multiple functional materials such as porous active particles, nano-cluster copper particles, and metal complex particles to achieve the functions of deodorization and formaldehyde removal. On the one hand, the high porosity of porous active particles, nano-cluster copper particles, etc. enhances the effective physical adsorption of odor molecules. On the other hand, the catalytic decomposition of components such as formaldehyde by titanium dioxide nanoparticles, as well as the active antibacterial effects of nano-copper and chitosan zinc / copper, fundamentally eliminate the source of odors. Moreover, a composite synergistic effect is formed among the materials, and the entire system maintains good stability. Compared with general deodorizing and formaldehyde-removing materials, the deodorizing and formaldehyde-removing dispersion liquid prepared in this application has better deodorizing effects and long-term stability, and can play an outstanding role in deodorizing and formaldehyde-removing functions in deodorizing products such as coatings and sprays. Detailed implementation manners

[0067] The present application will be described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0068] Unless otherwise specified, the raw materials in the embodiments of this application are all purchased through commercial channels.

[0069] The nano-cluster copper is the nano-copper powder CU-P100 of Shanghai Huzheng Industrial Co., Ltd.

[0070] Example 1: The porous active particles are prepared by the following method:

[0071] (1) 1500 ml of ethanol, 15 ml of hydrochloric acid, and 40 ml of water are fully mixed to form solution A.

[0072] (2) 40 g of zeolite (particle size 2 μm) is infiltrated in 1500 ml of ethanol and ultrasonicated, then left standing for 24 h. After dissolving 75 g of tetrabutyl titanate in 350 ml of ethanol, it is added thereto and ultrasonicated for 30 min to form solution B.

[0073] (3) Solution A is added to solution B at a rate of 5 ml / min, and stirred at 50 °C for 2 h.

[0074] (4) Filter and wash, vacuum dry at 70 °C, and calcine at 400 °C for 6 h.

[0075] The antibacterial metal complex is prepared by the following method:

[0076] (1) 7.5 g of chitosan (molecular weight 100000 g / mol, deacetylation degree 85%) is dissolved in 750 g of acetic acid, 23 g of zinc acetate and 13 g of copper acetate are added, and stirred for 1 h.

[0077] (2) 0.05 g of sorbitan fatty acid ester is added, ammonia water is added until the pH is 6.5, stirred and refluxed at 70 °C for 8 h, and then cooled to room temperature.

[0078] (3) Add 2.5 g of 25 wt% glutaraldehyde aqueous solution at a rate of 20 s per drop, stir for 3 h, centrifuge and wash, and dry in a vacuum at 70 °C.

[0079] The components were weighed, and 40 g of porous active particles and 0.05 g of nanocluster copper were mixed and dispersed in a mixed solution of 275 g of 0.18 wt% polyvinyl pyrrolidone in isopropanol and water (the mass ratio of isopropanol to water was 1:10); 7.5 g of the antibacterial metal complex was dispersed in 176.7 g of 0.14 wt% aqueous solution of dehydrated sorbitan fatty acid ester; the two dispersions were stirred at high speed and ultrasonicated for 3 h respectively, the solutions were mixed and stirred for 4 h, and passed through a 200-mesh sieve to obtain a deodorizing and formaldehyde-removing dispersion.

[0080] Example 2: Porous active particles were prepared by the following method:

[0081] (1) 1500 ml of ethanol, 15 ml of hydrochloric acid and 40 ml of water are thoroughly mixed to form solution A.

[0082] (2) 40 g of zeolite (particle size 2 μm) was soaked in 1400 ml of ethanol and ultrasonicated. The mixture was allowed to stand for 24 h. 85 g of butyl titanate was dissolved in 350 ml of ethanol and added thereto. The mixture was ultrasonicated for 30 min to form solution B.

[0083] (3) Solution A was added to solution B at a rate of 8 ml / min and stirred at 50 °C for 3 h.

[0084] (4) Filter and wash, vacuum dry at 70°C, and calcine at 500°C for 4 h.

[0085] The antimicrobial metal complexes were prepared by the following method:

[0086] (1) Dissolve 10 g of chitosan (molecular weight 100,000 g / mol, degree of deacetylation 85%) in 1150 g of acetic acid, add 19.5 g of zinc acetate and 14.5 g of copper acetate, and stir for 1 h.

[0087] (2) Add 0.05 g of dehydrated sorbitan fatty acid ester and aqueous ammonia until the pH reaches 6.5. Stir and reflux at 70°C for 6 h, then cool to room temperature.

[0088] (3) Add 3 g of 25 wt% glutaraldehyde aqueous solution at a rate of 30 s per drop, stir for 3 h, centrifuge and wash, and dry in a vacuum at 70 °C.

[0089] Weigh each component, mix and disperse 40 g of porous active particles and 0.1 g of copper nanoclusters in 275 g of a mixed solution of isopropanol and water containing 0.18 wt% polyvinylpyrrolidone (mass ratio of isopropanol to water is 1:10); disperse 10 g of antibacterial metal complex in 174.15 g of an aqueous solution containing 0.14 wt% sorbitan fatty acid ester; stir the two dispersions at high speed, ultrasonicate them for 3 h respectively, mix the solutions and stir for 5 h, and pass through a 200-mesh sieve to obtain the deodorizing and formaldehyde-removing dispersion.

[0090] Example 3: The porous active particles are prepared by the following method:

[0091] (1) Thoroughly mix 1500 ml of ethanol, 15 ml of hydrochloric acid and 40 ml of water to form solution A.

[0092] (2) Immerse 50 g of zeolite (particle size 2 μm) in 1500 ml of ethanol, ultrasonicate it, let it stand for 24 h, dissolve 100 g of tetrabutyl titanate in 350 ml of ethanol and then add it thereto, ultrasonicate for 30 min to form solution B.

[0093] (3) Add solution A to solution B at a rate of 10 ml / min and stir at 50 °C for 3 h.

[0094] (4) Filter and wash, dry in vacuum at 70 °C, and calcine at 500 °C for 5 h.

[0095] The antibacterial metal complex is prepared by the following method:

[0096] (1) Dissolve 7.5 g of chitosan (molecular weight 150000 g / mol, deacetylation degree 80%) in 1000 g of acetic acid, add 28 g of zinc acetate and 16 g of copper acetate, and stir for 1 h.

[0097] (2) Add 0.05 g of sorbitan fatty acid ester, add ammonia water until the pH is 7.0, stir and reflux at 70 °C for 8 h, and then cool to room temperature.

[0098] (3) Add 3.5 g of 25 wt% glutaraldehyde aqueous solution at a rate of one drop every 30 s, and stir for 3 h. After centrifugation and washing, dry in vacuum at 70 °C.

[0099] Weigh each component, mix and disperse 50 g of porous active particles and 0.05 g of copper nanoclusters in 275 g of a mixed solution of isopropanol and water containing 0.18 wt% polyvinylpyrrolidone (mass ratio of isopropanol to water is 1:10); disperse 7.5 g of antibacterial metal complex in 166.7 g of an aqueous solution containing 0.15 wt% sorbitan fatty acid ester; stir the two dispersions at high speed, ultrasonicate them for 3 h respectively, mix the solutions and stir for 5 h, and pass through a 200-mesh sieve to obtain the deodorizing and formaldehyde-removing dispersion.

[0100] Example 4: The preparation of the porous active particles is the same as that in Example 3, except that the particle size of the zeolite is 10 μm.

[0101] The preparation of the antibacterial metal complex and the deodorizing and formaldehyde-removing dispersion is the same as that in Example 3.

[0102] Example 5: The preparation of the antibacterial metal complex is the same as that in Example 3, except that the degree of deacetylation of chitosan is 90% and the molecular weight is 200,000 g / mol.

[0103] The preparation of the porous active particles and the deodorizing and formaldehyde-removing dispersion is the same as that in Example 3.

[0104] Example 6: The preparation of the antibacterial metal complex is the same as that in Example 3, except that the degree of deacetylation of chitosan is 70% and the molecular weight is 1,000,000 g / mol.

[0105] The preparation of the porous active particles and the deodorizing and formaldehyde-removing dispersion is the same as that in Example 3.

[0106] Example 7: The preparation of the porous active particles is the same as that in Example 3, except that in the preparation process of the porous active particles, step (3) is: Solution A is added to Solution B at a rate of 2 ml / min, and stirred at 50 °C for 3 h.

[0107] The preparation of the antibacterial metal complex and the deodorizing and formaldehyde-removing dispersion is the same as that in Example 3.

[0108] Example 8: The preparation of the porous active particles is the same as that in Example 3, except that in the preparation process of the porous active particles, step (3) is: Solution A is added to Solution B at a rate of 15 ml / min, and stirred at 50 °C for 3 h.

[0109] The preparation of the antibacterial metal complex and the deodorizing and formaldehyde-removing dispersion is the same as that in Example 3.

[0110] Example 9: The preparation of the antibacterial metal complex is the same as that in Example 3, except that in the preparation process of the antibacterial metal complex, step (3) is: 3.5 g of 25 wt% glutaraldehyde aqueous solution is added at a rate of 10 s interval per drop, and stirred for 3 h. After centrifugation and washing, it is dried in vacuum at 70 °C.

[0111] The preparation of the porous active particles and the deodorizing and formaldehyde-removing dispersion is the same as that in Example 3.

[0112] Example 10: The preparation of the antibacterial metal complex was the same as in Example 3, except that in the preparation process of the antibacterial metal complex, step (3) was: adding 3.5 g of 25 wt% glutaraldehyde aqueous solution at a rate of one drop every 50 s, stirring for 3 h. After centrifugation and washing, it was dried in vacuo at 70 °C.

[0113] The preparation of the porous active particles and the deodorizing and formaldehyde-removing dispersion was the same as in Example 3.

[0114] Test example: The deodorizing and formaldehyde-removing dispersions prepared in each example were respectively subjected to performance tests, including formaldehyde-removing test, deodorizing (ammonia and hydrogen sulfide) test, and antibacterial test.

[0115] For the formaldehyde-removing test, according to the standard QB / T 2761-2006 "Determination Method for Purification Effect of Indoor Air Purification Products", the experimental device was arranged. Five layers of medical absorbent gauze were wound around 2 glass rods, fixed and erected in the bottle, 200 ml of 0.2% formaldehyde solution was poured in, and it was used after the gauze was completely wetted. It was placed in the test chamber, and a 1 W light source was placed in the chamber. 100 g of each example sample was sprayed on 1 m 2 base paper, which was respectively placed in each test chamber. After testing for 24 h, the formaldehyde concentration difference between the test chamber and the blank chamber was measured. The formaldehyde-removing rate was the ratio of the concentration difference between the test chamber and the blank chamber to the blank concentration.

[0116] The hydrogen sulfide removal rate and ammonia removal rate were tested with reference to the standard CJ / T 516-2017 "Technical Requirements for Domestic Waste Deodorants".

[0117] Determination of the hydrogen sulfide removal effect: Under the conditions of normal temperature (20 °C) and normal pressure (1 standard atmosphere), 15 L of hydrogen sulfide gas with an initial concentration of 0.15 mg / m 3 was passed through a large bubble absorption tube containing 10 mL of each example sample at a flow rate of 1 L / min. The processed gas was collected, and the concentration was determined by methylene blue spectrophotometry with reference to GB / T 11742-2009.

[0118] Determination of the ammonia removal effect: Under the conditions of normal temperature (20 °C) and normal pressure (1 standard atmosphere), 15 L of ammonia gas with an initial concentration of 1.5 mg / m 3 was passed through a large bubble absorption tube containing 10 mL of each example sample at a flow rate of 1 L / min. The processed gas was collected, and the concentration was determined by Nessler's reagent spectrophotometry in accordance with HJ533-2009.

[0119] The antibacterial test was carried out according to the antibacterial rate test method of C4 dissolving anti-(or inhibiting)-bacterial products in Appendix C of the national standard GB15979-2002 "Hygienic Standards for Disposable Sanitary Products". The acting time was 2 minutes, and the test bacteria were Staphylococcus aureus and Escherichia coli.

[0120] The test results are shown in Table 1. It can be seen that Examples 1-3 have the functions of formaldehyde removal, odor removal (hydrogen sulfide, ammonia) and antibacterial and deodorization. The formaldehyde removal rate reaches over 95%, the hydrogen sulfide removal rate reaches over 92%, the ammonia removal rate reaches over 96%, and the antibacterial rate reaches 99.9%. Therefore, this deodorizing and formaldehyde-removing dispersion has good application prospects in the relevant functional application market fields.

[0121] Table 1

[0122] Formaldehyde removal rate Hydrogen sulfide removal rate Ammonia removal rate Inhibitory rate against Staphylococcus aureus Inhibitory rate against Escherichia coli Example 1 95.10% 92.40% 96.70% 99.90% 99.90% Example 2 96.30% 92.80% 97.60% 99.90% 99.90% Example 3 95.50% 92.50% 97.20% 99.90% 99.90% Example 4 76.32% 70.25% 74.10% 86.14% 84.59% Example 5 84.30% 81.15% 82.64% 83.74% 82.98% Example 6 84.65% 81.54% 82.43% 81.24% 80.76% Example 7 87.62% 84.76% 85.34% 88.97% 86.79% Example 8 82.56% 81.30% 83.61% 89.58% 88.94% Example 9 85.73% 82.94% 86.10% 87.53% 89.90% Example 10 80.20% 76.14% 80.34% 86.50% 83.82%

[0123] The above are only several embodiments of the present application, and do not impose any form of limitation on the present application. Although the present application is disclosed above with preferred embodiments, it is not intended to limit the present application. Any person skilled in the art, without departing from the technical solution of the present application, makes some changes or modifications using the technical content disclosed above, which are equivalent to equivalent embodiments and all fall within the scope of the technical solution.

Claims

1. An odor-removing and formaldehyde-removing dispersion liquid, characterized in that, It includes the following components: Porous active particles: 5 - 10 wt%; Nanocluster copper: 0.01 - 0.02 wt%; Antibacterial metal complex: 1 - 3 wt%; Organic solvent: 3 - 5 wt%; Dispersant: 0.1 - 0.3 wt%; Surfactant: 0.05 - 0.1 wt%; The balance is water; The porous active particles are zeolite particles loaded with titanium dioxide; the particle size of the porous active particles is 1 - 3 μm; The particle size of the nanocluster copper is 100 - 200 nm; The antibacterial metal complex is chitosan zinc complex and chitosan copper complex; In the chitosan zinc complex and chitosan copper complex, the molecular weight of chitosan is 100000 - 150000 g / mol, and the degree of deacetylation is 80 - 85%; The preparation method of the porous active particles includes the following steps: (1) Mix absolute ethanol, hydrochloric acid and deionized water to obtain solution A; (2) Mix zeolite particles, absolute ethanol and tetrabutyl titanate to obtain solution B; (3) Add solution A to solution B at a rate of 5 - 10 ml / min; (4) Filter and wash, then vacuum dry and calcine; The preparation method of the antibacterial metal complex includes the following steps: (Ⅰ) Mix chitosan, weak acid, organic zinc salt and organic copper salt to obtain mixture 1; (Ⅱ) Mix mixture 1 and non-ionic surfactant and adjust the pH to 6.5 - 7.5 to obtain mixture 2; (Ⅲ) Dropwise add aqueous glutaraldehyde solution to mixture 2. The dropwise addition method is to add 1 drop of aqueous glutaraldehyde solution every 20 - 30 s, then centrifuge, wash and vacuum dry.

2. The deodorizing and formaldehyde-removing dispersion liquid according to claim 1, wherein In step (4), the calcination temperature is 400 - 500 °C and the calcination time is 4 - 6 h.

3. A method for preparing the deodorizing and formaldehyde-removing dispersion liquid according to claim 1 or 2, characterized in that, It includes: Mix the porous active particles, nanocluster copper, antibacterial metal complex, organic solvent, dispersant, surfactant and water to obtain it.