CN109289415B - Multifunctional air purification filter screen and preparation method thereof - Google Patents
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Abstract
The invention provides a multifunctional air purification filter screen and a preparation method thereof. The method comprises the steps of respectively preparing spinning solution from cation exchange resin and anion exchange resin, adding tourmaline and cerium dioxide powder into the spinning solution for dispersion, then carrying out composite spinning to prepare nanofiber non-woven fabric, further carrying out solvent thermal reaction to generate a zinc cadmium sulfide photocatalyst in situ, and loading the zinc cadmium sulfide photocatalyst on the surface of the non-woven fabric to prepare the multifunctional air purification filter screen. Compared with the traditional method, the air purification filter screen prepared by the invention can remove NH in air by ion exchange adsorption3、NO2、SO2、SO3、HF、HCl、H2S and other inorganic gases remove PM2.5 particles in the air through physical and chemical adsorption, and volatile organic compounds such as formaldehyde, benzene, toluene and the like in the air are degraded through zinc cadmium sulfide catalysis, and negative oxygen ions can be released, and the air purifier is simple in structure and low in cost.
Description
Technical Field
The invention belongs to the technical field of air purification materials, and provides a multifunctional air purification filter screen and a preparation method thereof.
Background
With the increasing environmental pollution, air pollution has become an important issue threatening human health and social development in the world today, so the development of air purification technology and the research and application of air purification products are receiving more and more attention. The main pollutants in the air include dust particles, volatile organic pollutants, inorganic harmful gases, microorganisms, and the like, and the topic of pertinently researching and applying air purification products is widely concerned.
Currently, a large number of air purification products are on the market in order to meet the demand for air purification. Most products can effectively remove particle pollutants, and a small amount of products can adsorb and purify harmful gas pollutants. The air purification filter screen is a core component of the air purifier, and with the wide application of the air purifier, the research and application of the filter screen also become a hot topic.
The air purification filter screen mainly comprises a primary filter screen, an HEPA filter screen, an active carbon filter screen, an antibacterial filter screen and the like, and mainly utilizes the technologies of adsorption technology, photocatalysis technology, static electricity, negative ions and the like. And mainly has a single-layer filter screen and a multi-layer filter screen according to the structural form. The existing air purification rate net generally has the defects of low adsorption capacity, poor deodorization effect, short service life, easy secondary pollution, poor catalytic decomposition capability on harmful substances in the air and the like, and can not meet the use requirement. Therefore, research and application of new air purification filter screens are becoming more and more important.
The Chinese patent application No. 201210368195.6 discloses an air purification filter screen, which is of a sheet grid structure, and the preparation method of the air purification filter screen comprises the following steps: (1) selection, treatment and design of preparation raw materials; (2) the combination of an adsorbent material with a perfuming material or component; (3) forming a final product; (4) and (5) sealing and packaging the product. However, the air purification filter screen prepared by the invention has single function and poor purification effect.
Chinese patent application No. 201720797861.6 discloses a multifunctional air purification filter screen, which comprises a primary filter module, a HEPA filter module, and a gas adsorption and catalytic degradation module. The multimode block structure sets up to link up fixedly into a whole filter screen from outside to inside in proper order, can carry out effectual interception to particle pollutants such as fine particle thing (PM 2.5) in the environment, bacterium, virus, carry out thorough decomposition, purification, can also deodorization, antibacterial, disinfect to gaseous pollutants such as formaldehyde, ozone, toluene, is the multi-functional air purification filter screen that collects filtration, purification, antibiotic etc. as an organic whole. The air purification filter screen prepared by the method has a complex structure and high preparation cost.
In summary, in the prior art, the multi-layer filter screen has the defects of complex structure and high cost, and the single-layer filter screen has a single function, so that the development of the multi-functional, high-efficiency and low-cost air purification filter screen has important significance.
Disclosure of Invention
Therefore, in the prior art, the multilayer filter screen has the defects of complex structure, high cost and single function of the single-layer filter screen. Aiming at the situation, the invention provides a multifunctional air purification filter screen and a preparation method thereof, which can remove NH in air through ion exchange adsorption3、NO2、SO2、SO3、HF、HCl、H2S and other inorganic gases remove PM2.5 particles in the air through physical and chemical adsorption, and volatile organic compounds such as formaldehyde, benzene, toluene and the like in the air are degraded through zinc cadmium sulfide catalysis, and negative oxygen ions can be released, and the air purifier is simple in structure and low in cost.
In order to achieve the purpose, the invention relates to the following specific technical scheme:
a preparation method of a multifunctional air purification filter screen comprises the following specific steps:
(1) adding cation exchange resin into tetrahydrofuran, stirring until the cation exchange resin is completely dissolved, then adding tourmaline powder, cerium dioxide powder and polyethylene wax, and uniformly dispersing to obtain a spinning solution A;
(2) adding anion exchange resin into N, N-dimethylformamide, stirring until the anion exchange resin is completely dissolved, then adding tourmaline powder, cerium dioxide powder and polyethylene wax, and uniformly dispersing to obtain a spinning solution B;
(3) respectively injecting the spinning solution A and the spinning solution B into two injectors with opposite polarities, and then respectively applying positive and negative voltages to the two injectors to carry out composite spinning to prepare a nanofiber non-woven fabric which is formed by compounding cation exchange fibers and anion exchange fibers and can release negative oxygen ions;
(4) and (3) dipping the nanofiber non-woven fabric prepared in the step (3) into a glycol solution of thiourea, then slowly dropwise adding the glycol solution of cadmium chloride and zinc chloride, generating a zinc cadmium sulfide photocatalyst through solvothermal reaction, loading the zinc cadmium sulfide photocatalyst on the surface of the nanofiber non-woven fabric, taking out the non-woven fabric after the reaction is finished, washing and drying in vacuum to prepare the multifunctional air purification filter screen.
Preferably, the cation exchange resin in the step (1) is 2-acrylamide-2-methylpropanesulfonic acid resin.
Preferably, in the spinning solution A in the step (1), 18-25 parts by weight of cation exchange resin, 60-75 parts by weight of tetrahydrofuran, 5-10 parts by weight of tourmaline powder, 1-3 parts by weight of cerium dioxide powder and 1-2 parts by weight of polyethylene wax are added.
Preferably, the anion exchange resin in the step (2) is dimethylaminoethyl methacrylate resin.
Preferably, in the spinning solution B in the step (2), 18-25 parts by weight of anion exchange resin, 60-75 parts by weight of N, N-dimethylformamide, 5-10 parts by weight of tourmaline powder, 1-3 parts by weight of cerium dioxide powder and 1-2 parts by weight of polyethylene wax are added.
Preferably, the weight ratio of the spinning solution A to the spinning solution B in the composite spinning in the step (3) is 1: 2-2: 1, the voltage between a positive electrode and a negative electrode is 5-8 kV, the distance between two syringe needles is 10-15 cm, and the receiving distance is 10-15 cm.
Preferably, the raw materials in the step (4) comprise, by weight, 20-30 parts of nanofiber non-woven fabric, 51-68 parts of ethylene glycol, 6-10 parts of thiourea, 2-3 parts of cadmium chloride and 4-6 parts of zinc chloride.
Preferably, the temperature of the solvothermal reaction in the step (4) is 140-160 ℃, and the time is 2-3 h.
Preferably, the temperature of the vacuum drying in the step (4) is 50-70 ℃, and the time is 4-6 h.
The invention also provides a multifunctional air purification filter screen prepared by the preparation method. The multifunctional air purification filter screen is prepared by respectively preparing spinning solution from cation exchange resin and anion exchange resin, adding tourmaline and cerium dioxide powder into the spinning solution for dispersion, then carrying out composite spinning to prepare nanofiber non-woven fabric, further carrying out solvothermal reaction to generate a zinc cadmium sulfide photocatalyst in situ, and loading the zinc cadmium sulfide photocatalyst on the surface of the non-woven fabric.
Compared with the prior art, the invention provides a multifunctional air purification filter screen and a preparation method thereof, and the outstanding characteristics and excellent effects are as follows:
1. the preparation method of the invention carries out composite spinning by using the cation exchange resin spinning solution and the anion exchange resin spinning solution, and the prepared nanofiber non-woven fabric has cation exchange capacity and can adsorb NH in air3Simultaneously has anion exchange capacity and can adsorb NO in the air2、SO2、SO3、HF、HCl、H2S, therefore, the inorganic gas can be well exchanged and removed.
2. According to the preparation method, the nanofiber has a high specific surface area, physical adsorption can be formed on PM2.5 particles in the air, and further, metal ions are always carried on the surface of the PM2.5 particles, so that ion exchange can be carried out on the metal ions and the cation exchange resin to form chemical adsorption, and therefore the preparation method has a good filtering effect on the PM2.5 particles.
3. According to the preparation method, negative oxygen ion releasing agent tourmaline powder is respectively added into the cation exchange resin spinning solution and the anion exchange resin spinning solution, cerium dioxide with high radiation energy and long half-life period is adopted to promote the ionization of tourmaline to air, the effect of generating negative oxygen ions by tourmaline is enhanced, and the purpose of benefiting human health is achieved.
4. The preparation method of the invention synthesizes the loaded zinc cadmium sulfide photocatalyst on the surface of the nanofiber non-woven fabric in situ, and can play a good role in catalyzing and degrading volatile organic compounds such as formaldehyde, benzene, toluene and the like in the air.
5. The multifunctional air purification filter screen prepared by the invention is a single-layer non-woven fabric, and has the advantages of simple structure, lower preparation cost and high cost performance.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but it should not be construed that the scope of the present invention is limited to the following examples. Various substitutions and alterations can be made by those skilled in the art and by conventional means without departing from the spirit of the method of the invention described above.
Example 1
(1) Adding cation exchange resin into tetrahydrofuran, stirring until the cation exchange resin is completely dissolved, then adding tourmaline powder, cerium dioxide powder and polyethylene wax, and uniformly dispersing to obtain a spinning solution A; the cation exchange resin is 2-acrylamide-2-methylpropanesulfonic acid resin; in the spinning solution A, 21 parts by weight of cation exchange resin, 69 parts by weight of tetrahydrofuran, 7 parts by weight of tourmaline powder, 2 parts by weight of cerium dioxide powder and 1 part by weight of polyethylene wax;
(2) adding anion exchange resin into N, N-dimethylformamide, stirring until the anion exchange resin is completely dissolved, then adding tourmaline powder, cerium dioxide powder and polyethylene wax, and uniformly dispersing to obtain a spinning solution B; the anion exchange resin is dimethylamine ethyl methacrylate resin; in the spinning solution B, 21 parts by weight of anion exchange resin, 68 parts by weight of N, N-dimethylformamide, 7 parts by weight of tourmaline powder, 2 parts by weight of cerium dioxide powder and 2 parts by weight of polyethylene wax;
(3) respectively injecting the spinning solution A and the spinning solution B into two injectors with opposite polarities, and then respectively applying positive and negative voltages to the two injectors to carry out composite spinning to prepare a nanofiber non-woven fabric which is formed by compounding cation exchange fibers and anion exchange fibers and can release negative oxygen ions; the weight ratio of the spinning solution A to the spinning solution B of the composite spinning is 1:1, the voltage between the positive electrode and the negative electrode is 7kV, the distance between the two syringe needles is 13cm, and the receiving distance is 13 cm;
(4) dipping the nanofiber non-woven fabric prepared in the step (3) into a glycol solution of thiourea, then slowly dropwise adding a glycol solution of cadmium chloride and zinc chloride, generating a zinc cadmium sulfide photocatalyst through solvothermal reaction, loading the zinc cadmium sulfide photocatalyst on the surface of the nanofiber non-woven fabric, taking out the non-woven fabric after the reaction is finished, washing and drying in vacuum to prepare the multifunctional air purification filter screen; the temperature of the solvothermal reaction is 148 ℃ and the time is 2.5 h; the temperature of vacuum drying is 58 ℃ and the time is 5 h; the weight parts of the raw materials are 26 parts of nanofiber non-woven fabric, 59 parts of ethylene glycol, 7 parts of thiourea, 3 parts of cadmium chloride and 5 parts of zinc chloride.
Example 2
(1) Adding cation exchange resin into tetrahydrofuran, stirring until the cation exchange resin is completely dissolved, then adding tourmaline powder, cerium dioxide powder and polyethylene wax, and uniformly dispersing to obtain a spinning solution A; the cation exchange resin is 2-acrylamide-2-methylpropanesulfonic acid resin; in the spinning solution A, 19 parts by weight of cation exchange resin, 72 parts by weight of tetrahydrofuran, 7 parts by weight of tourmaline powder, 1 part by weight of cerium dioxide powder and 1 part by weight of polyethylene wax;
(2) adding anion exchange resin into N, N-dimethylformamide, stirring until the anion exchange resin is completely dissolved, then adding tourmaline powder, cerium dioxide powder and polyethylene wax, and uniformly dispersing to obtain a spinning solution B; the anion exchange resin is dimethylamine ethyl methacrylate resin; in the spinning solution B, 20 parts by weight of anion exchange resin, 71 parts by weight of N, N-dimethylformamide, 7 parts by weight of tourmaline powder, 1 part by weight of cerium dioxide powder and 1 part by weight of polyethylene wax;
(3) respectively injecting the spinning solution A and the spinning solution B into two injectors with opposite polarities, and then respectively applying positive and negative voltages to the two injectors to carry out composite spinning to prepare a nanofiber non-woven fabric which is formed by compounding cation exchange fibers and anion exchange fibers and can release negative oxygen ions; the weight ratio of the spinning solution A to the spinning solution B of the composite spinning is 1:2, the voltage between the positive electrode and the negative electrode is 6kV, the distance between the two syringe needles is 11cm, and the receiving distance is 11 cm;
(4) dipping the nanofiber non-woven fabric prepared in the step (3) into a glycol solution of thiourea, then slowly dropwise adding a glycol solution of cadmium chloride and zinc chloride, generating a zinc cadmium sulfide photocatalyst through solvothermal reaction, loading the zinc cadmium sulfide photocatalyst on the surface of the nanofiber non-woven fabric, taking out the non-woven fabric after the reaction is finished, washing and drying in vacuum to prepare the multifunctional air purification filter screen; the temperature of the solvothermal reaction is 145 ℃ for 3 h; the temperature of vacuum drying is 55 ℃, and the time is 5.5 h; the weight parts of the raw materials are 23 parts of nanofiber non-woven fabric, 63 parts of ethylene glycol, 7 parts of thiourea, 2 parts of cadmium chloride and 5 parts of zinc chloride.
Example 3
(1) Adding cation exchange resin into tetrahydrofuran, stirring until the cation exchange resin is completely dissolved, then adding tourmaline powder, cerium dioxide powder and polyethylene wax, and uniformly dispersing to obtain a spinning solution A; the cation exchange resin is 2-acrylamide-2-methylpropanesulfonic acid resin; in the spinning solution a, 22 parts by weight of a cation exchange resin, 65 parts by weight of tetrahydrofuran, 8 parts by weight of tourmaline powder, 3 parts by weight of cerium dioxide powder, and 2 parts by weight of polyethylene wax;
(2) adding anion exchange resin into N, N-dimethylformamide, stirring until the anion exchange resin is completely dissolved, then adding tourmaline powder, cerium dioxide powder and polyethylene wax, and uniformly dispersing to obtain a spinning solution B; the anion exchange resin is dimethylamine ethyl methacrylate resin; in the spinning solution B, 23 parts by weight of anion exchange resin, 63 parts by weight of N, N-dimethylformamide, 9 parts by weight of tourmaline powder, 3 parts by weight of cerium dioxide powder and 2 parts by weight of polyethylene wax;
(3) respectively injecting the spinning solution A and the spinning solution B into two injectors with opposite polarities, and then respectively applying positive and negative voltages to the two injectors to carry out composite spinning to prepare a nanofiber non-woven fabric which is formed by compounding cation exchange fibers and anion exchange fibers and can release negative oxygen ions; the weight ratio of the spinning solution A to the spinning solution B of the composite spinning is 2:1, the voltage between the positive electrode and the negative electrode is 7kV, the distance between the two syringe needles is 14cm, and the receiving distance is 14 cm;
(4) dipping the nanofiber non-woven fabric prepared in the step (3) into a glycol solution of thiourea, then slowly dropwise adding a glycol solution of cadmium chloride and zinc chloride, generating a zinc cadmium sulfide photocatalyst through solvothermal reaction, loading the zinc cadmium sulfide photocatalyst on the surface of the nanofiber non-woven fabric, taking out the non-woven fabric after the reaction is finished, washing and drying in vacuum to prepare the multifunctional air purification filter screen; the temperature of the solvothermal reaction is 155 ℃, and the time is 2 h; the temperature of vacuum drying is 65 ℃, and the time is 4.5 h; the weight parts of the raw materials are 27 parts of nanofiber non-woven fabric, 56 parts of ethylene glycol, 9 parts of thiourea, 3 parts of cadmium chloride and 5 parts of zinc chloride.
Example 4
(1) Adding cation exchange resin into tetrahydrofuran, stirring until the cation exchange resin is completely dissolved, then adding tourmaline powder, cerium dioxide powder and polyethylene wax, and uniformly dispersing to obtain a spinning solution A; the cation exchange resin is 2-acrylamide-2-methylpropanesulfonic acid resin; in the spinning solution a, 18 parts by weight of a cation exchange resin, 75 parts by weight of tetrahydrofuran, 5 parts by weight of tourmaline powder, 1 part by weight of cerium oxide powder, and 1 part by weight of polyethylene wax;
(2) adding anion exchange resin into N, N-dimethylformamide, stirring until the anion exchange resin is completely dissolved, then adding tourmaline powder, cerium dioxide powder and polyethylene wax, and uniformly dispersing to obtain a spinning solution B; the anion exchange resin is dimethylamine ethyl methacrylate resin; in the spinning solution B, 18 parts by weight of anion exchange resin, 75 parts by weight of N, N-dimethylformamide, 5 parts by weight of tourmaline powder, 1 part by weight of cerium dioxide powder and 1 part by weight of polyethylene wax;
(3) respectively injecting the spinning solution A and the spinning solution B into two injectors with opposite polarities, and then respectively applying positive and negative voltages to the two injectors to carry out composite spinning to prepare a nanofiber non-woven fabric which is formed by compounding cation exchange fibers and anion exchange fibers and can release negative oxygen ions; the weight ratio of the spinning solution A to the spinning solution B of the composite spinning is 1:2, the voltage between the positive electrode and the negative electrode is 5kV, the distance between the two syringe needles is 10cm, and the receiving distance is 10 cm;
(4) dipping the nanofiber non-woven fabric prepared in the step (3) into a glycol solution of thiourea, then slowly dropwise adding a glycol solution of cadmium chloride and zinc chloride, generating a zinc cadmium sulfide photocatalyst through solvothermal reaction, loading the zinc cadmium sulfide photocatalyst on the surface of the nanofiber non-woven fabric, taking out the non-woven fabric after the reaction is finished, washing and drying in vacuum to prepare the multifunctional air purification filter screen; the temperature of the solvothermal reaction is 140 ℃, and the time is 3 h; the temperature of vacuum drying is 50 ℃, and the time is 6 h; the weight parts of the raw materials are 20 parts of nanofiber non-woven fabric, 68 parts of ethylene glycol, 6 parts of thiourea, 2 parts of cadmium chloride and 4 parts of zinc chloride.
Example 5
(1) Adding cation exchange resin into tetrahydrofuran, stirring until the cation exchange resin is completely dissolved, then adding tourmaline powder, cerium dioxide powder and polyethylene wax, and uniformly dispersing to obtain a spinning solution A; the cation exchange resin is 2-acrylamide-2-methylpropanesulfonic acid resin; in the spinning solution a, 25 parts by weight of a cation exchange resin, 60 parts by weight of tetrahydrofuran, 10 parts by weight of tourmaline powder, 3 parts by weight of cerium oxide powder, and 2 parts by weight of polyethylene wax;
(2) adding anion exchange resin into N, N-dimethylformamide, stirring until the anion exchange resin is completely dissolved, then adding tourmaline powder, cerium dioxide powder and polyethylene wax, and uniformly dispersing to obtain a spinning solution B; the anion exchange resin is dimethylamine ethyl methacrylate resin; in the spinning solution B, 25 parts by weight of anion exchange resin, 60 parts by weight of N, N-dimethylformamide, 10 parts by weight of tourmaline powder, 3 parts by weight of cerium dioxide powder and 2 parts by weight of polyethylene wax;
(3) respectively injecting the spinning solution A and the spinning solution B into two injectors with opposite polarities, and then respectively applying positive and negative voltages to the two injectors to carry out composite spinning to prepare a nanofiber non-woven fabric which is formed by compounding cation exchange fibers and anion exchange fibers and can release negative oxygen ions; the weight ratio of the spinning solution A to the spinning solution B of the composite spinning is 2:1, the voltage between the positive electrode and the negative electrode is 8kV, the distance between the two syringe needles is 15cm, and the receiving distance is 15 cm;
(4) dipping the nanofiber non-woven fabric prepared in the step (3) into a glycol solution of thiourea, then slowly dropwise adding a glycol solution of cadmium chloride and zinc chloride, generating a zinc cadmium sulfide photocatalyst through solvothermal reaction, loading the zinc cadmium sulfide photocatalyst on the surface of the nanofiber non-woven fabric, taking out the non-woven fabric after the reaction is finished, washing and drying in vacuum to prepare the multifunctional air purification filter screen; the temperature of the solvothermal reaction is 160 ℃, and the time is 2 hours; the temperature of vacuum drying is 70 ℃, and the time is 4 hours; the weight parts of the raw materials are 30 parts of nanofiber non-woven fabric, 51 parts of ethylene glycol, 10 parts of thiourea, 3 parts of cadmium chloride and 6 parts of zinc chloride.
Example 6
(1) Adding cation exchange resin into tetrahydrofuran, stirring until the cation exchange resin is completely dissolved, then adding tourmaline powder, cerium dioxide powder and polyethylene wax, and uniformly dispersing to obtain a spinning solution A; the cation exchange resin is 2-acrylamide-2-methylpropanesulfonic acid resin; in the spinning solution a, 22 parts by weight of a cation exchange resin, 67 parts by weight of tetrahydrofuran, 8 parts by weight of tourmaline powder, 2 parts by weight of cerium oxide powder, and 1 part by weight of polyethylene wax;
(2) adding anion exchange resin into N, N-dimethylformamide, stirring until the anion exchange resin is completely dissolved, then adding tourmaline powder, cerium dioxide powder and polyethylene wax, and uniformly dispersing to obtain a spinning solution B; the anion exchange resin is dimethylamine ethyl methacrylate resin; in the spinning solution B, 22 parts by weight of anion exchange resin, 67 parts by weight of N, N-dimethylformamide, 7 parts by weight of tourmaline powder, 2 parts by weight of cerium dioxide powder and 2 parts by weight of polyethylene wax;
(3) respectively injecting the spinning solution A and the spinning solution B into two injectors with opposite polarities, and then respectively applying positive and negative voltages to the two injectors to carry out composite spinning to prepare a nanofiber non-woven fabric which is formed by compounding cation exchange fibers and anion exchange fibers and can release negative oxygen ions; the weight ratio of the spinning solution A to the spinning solution B of the composite spinning is 1:1, the voltage between the positive electrode and the negative electrode is 6.5kV, the distance between the two syringe needles is 12cm, and the receiving distance is 12 cm;
(4) dipping the nanofiber non-woven fabric prepared in the step (3) into a glycol solution of thiourea, then slowly dropwise adding a glycol solution of cadmium chloride and zinc chloride, generating a zinc cadmium sulfide photocatalyst through solvothermal reaction, loading the zinc cadmium sulfide photocatalyst on the surface of the nanofiber non-woven fabric, taking out the non-woven fabric after the reaction is finished, washing and drying in vacuum to prepare the multifunctional air purification filter screen; the temperature of the solvothermal reaction is 150 ℃ and the time is 2.5 h; the temperature of vacuum drying is 60 ℃, and the time is 5 h; the weight parts of the raw materials are 25 parts of nanofiber non-woven fabric, 60 parts of ethylene glycol, 8 parts of thiourea, 2 parts of cadmium chloride and 5 parts of zinc chloride.
Comparative example 1
In the preparation process, tourmaline powder and cerium oxide powder were not added, and other preparation conditions were the same as those of example 6.
Comparative example 2
In the preparation process, zinc cadmium sulfide is not loaded, and other preparation conditions are consistent with those of example 6.
And (3) performance testing:
（1）NH3、NO2HF, TVOC, PM2.5 removal rate: the air filter screen is arranged in an air purification system, the test is carried out at normal temperature and normal pressure and with relative humidity of 55 percent, and NH is respectively introduced into the air purification system3、NO2HF, TVOC and PM2.5, using nitrogen as carrier gas, flow rate is 70mL/min, and NH before and after passing through air purification filter screen is respectively measured by gas chromatography3、NO2HF, TVOC's concentration, adopt PM2.5 tester test PM2.5 concentration, calculate the clearance:
(2) concentration of negative oxygen ions: the air purification filter element prepared by the invention is subjected to negative ion release performance test, the test is carried out under the conditions that the room temperature is 25 ℃ and the humidity is 55%, the filter element material is placed in a common air purifier, a laboratory (1 m multiplied by 1 m) is fully ventilated, then a door and a window are closed, a negative ion generator is placed in the center of the laboratory, the laboratory is opened for 15 minutes, the wind speed is 0, and the concentration of negative oxygen ions is tested.
The data obtained are shown in Table 1.
Table 1:
Claims (2)
1. the preparation method of the multifunctional air purification filter screen is characterized by comprising the following specific steps of:
(1) adding cation exchange resin into tetrahydrofuran, stirring until the cation exchange resin is completely dissolved, then adding tourmaline powder, cerium dioxide powder and polyethylene wax, and uniformly dispersing to obtain a spinning solution A; the cation exchange resin is 2-acrylamide-2-methylpropanesulfonic acid resin; in the spinning solution A, 18-25 parts by weight of cation exchange resin, 60-75 parts by weight of tetrahydrofuran, 5-10 parts by weight of tourmaline powder, 1-3 parts by weight of cerium dioxide powder and 1-2 parts by weight of polyethylene wax;
(2) adding anion exchange resin into N, N-dimethylformamide, stirring until the anion exchange resin is completely dissolved, then adding tourmaline powder, cerium dioxide powder and polyethylene wax, and uniformly dispersing to obtain a spinning solution B; the anion exchange resin is dimethylaminoethyl methacrylate resin; in the spinning solution B, 18-25 parts by weight of anion exchange resin, 60-75 parts by weight of N, N-dimethylformamide, 5-10 parts by weight of tourmaline powder, 1-3 parts by weight of cerium dioxide powder and 1-2 parts by weight of polyethylene wax;
(3) respectively injecting the spinning solution A and the spinning solution B into two injectors with opposite polarities, and then respectively applying positive and negative voltages to the two injectors to carry out composite spinning to prepare a nanofiber non-woven fabric which is formed by compounding cation exchange fibers and anion exchange fibers and can release negative oxygen ions; the weight ratio of the spinning solution A to the spinning solution B of the composite spinning is 1: 2-2: 1, the voltage between a positive electrode and a negative electrode is 5-8 kV, the distance between two syringe needles is 10-15 cm, and the receiving distance is 10-15 cm;
(4) dipping the nanofiber non-woven fabric prepared in the step (3) into a glycol solution of thiourea, then slowly dropwise adding a glycol solution of cadmium chloride and zinc chloride, generating a zinc cadmium sulfide photocatalyst through solvothermal reaction, loading the zinc cadmium sulfide photocatalyst on the surface of the nanofiber non-woven fabric, taking out the non-woven fabric after the reaction is finished, washing and drying in vacuum to prepare the multifunctional air purification filter screen; the weight parts of the raw materials are 20-30 parts of nanofiber non-woven fabric, 51-68 parts of ethylene glycol, 6-10 parts of thiourea, 2-3 parts of cadmium chloride and 4-6 parts of zinc chloride; the temperature of the solvothermal reaction is 140-160 ℃, and the time is 2-3 h; the temperature of the vacuum drying is 50-70 ℃, and the time is 4-6 h.
2. A multifunctional air purification filter screen prepared by the preparation method of claim 1.
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| CN1658820A (en) * | 2002-06-12 | 2005-08-24 | 莱雅公司 | Compositions containing at least one oil structured with at least one silicone-polyamide polymer, and at least one film-forming polymer and methods thereof |
| CN107001910A (en) * | 2014-10-15 | 2017-08-01 | 王子控股株式会社 | Composition comprising fine cellulose fiber |
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| CN1179754C (en) * | 2002-07-08 | 2004-12-15 | 中国建筑材料科学研究院 | Composition tourmaline powder able to effectively generate negative ions in air and its preparing process |
| CN103015037B (en) * | 2012-12-27 | 2015-01-28 | 东南大学 | Method for preparing nanometer mosaic film by using electrostatic spinning method |
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| CN106975521A (en) * | 2017-04-19 | 2017-07-25 | 淮北师范大学 | A kind of preparation method of visible light-responded zinc cadmium sulphur solid solution catalysis material |
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