CN109499184B - Filtering material capable of releasing ecological negative ions and preparation method thereof - Google Patents

Filtering material capable of releasing ecological negative ions and preparation method thereof Download PDF

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CN109499184B
CN109499184B CN201811282092.1A CN201811282092A CN109499184B CN 109499184 B CN109499184 B CN 109499184B CN 201811282092 A CN201811282092 A CN 201811282092A CN 109499184 B CN109499184 B CN 109499184B
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negative ion
filter
water
powder
filter material
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CN109499184A (en
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万军民
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Zhejiang Sci Tech University ZSTU
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

Abstract

The invention relates to the field of filter materials, and discloses a filter material capable of releasing ecological negative ions and a preparation method thereof,the main body of the filter material is a high-molecular air or water body filter substrate loaded with nanometer anion powder. The preparation method comprises the following steps: 1) mixing and high-speed grinding the anion powder, the inorganic dispersant and the deionized water to prepare stable dispersion liquid containing the nanometer anion powder; 2) adding the stable dispersion liquid into the water-based adhesive, stirring at a high speed and emulsifying to prepare an open-pore water-based adhesive emulsion containing nano negative ion powder; 3) performing multiple dispersed point water jet operation on the filtering base material by adopting a gap type point water jet process to obtain the filtering base material loaded with nano negative ion powder; 4) and curing the filter base material to obtain a finished product. The filter material has high-efficiency immobilization performance, the load is not easy to fall off, and the maximum release amount of ecological negative oxygen ions can reach 25000/cm2。

Description

Filtering material capable of releasing ecological negative ions and preparation method thereof
Technical Field
The invention relates to the field of filter materials, in particular to a filter material capable of releasing ecological negative ions and a preparation method thereof.
Background
At present, the ventilation filter screen is mainly made into a whole by spinning and forming PP, PET and other fibers, has better acid and alkali resistance and corrosion resistance, has low resistance, can be repeatedly cleaned, has relatively high economical efficiency, is easy to clean the captured long and short fibers and dust particles, has no influence on the filtering efficiency by cleaning, has very good impact strength, and is a preferred product of customers. The air conditioner filter screen is of a concave-convex honeycomb structure, can be widely applied to a sewage filtering system and air filtration, is easy to clean and replace for many times, and has lasting effect taking time. And the air conditioner filter screen is convenient to clean and is accepted by the vast users. The above-mentioned all are coarse filter screens, the main use is that coarse dust filters, air filtration system prefilter. Direct filtration, simple process, good air permeability, uniform and stable precision, no leakage, good regeneration performance, high regeneration speed, convenient installation, high efficiency and long service life. The filter is mainly used for air conditioners, purifiers, smoke exhaust ventilators, air filters, dehumidifiers, dust collectors and the like, is suitable for various different filtering, dust removing and separating requirements, and is suitable for filtering in various industries such as petroleum, chemical engineering, mineral products, food, pharmacy and the like.
The filter screen is more and more widely used, also can use often in general family. However, the existing filter material is only limited to coarse filtration of air, and cannot remove fine dust and other organic pollutants in the air, formaldehyde and other organic pollutants in the air. Therefore, the application of the filter material to remove pollutants and harmful components in the air is a matter beneficial to human health and beneficial to human beings.
The negative oxygen ions have neutralization effect in the polluted air with positive particle ions, so that the air quality can be improved. In addition, the negative oxygen ions can promote the metabolism of human bodies, improve the immunity and regulate the functional balance, are relaxed and happy, and are known as 'air vitamins'. In addition, the negative oxygen ions also have good biological activity, and most of the negative oxygen ions are absorbed into the human body by taking the combination of the hydrate of the negative oxygen ion group and the carbonate oxygen ion group as the main material. Therefore, the negative oxygen ions have curative effects on early hypertension, occlusive angiopathy, spastic vasculopathy, neurasthenia, chronic gastritis, upper respiratory inflammation, asthma tracheae, atrophic rhinitis, burn, afuta stomatitis and the like in medical treatment. Experiments prove that the air negative ions can reduce the content of 5-hydroxytryptamine in blood and enhance the nerve inhibition process; it has effects of tranquilizing, hypnotizing, lowering blood pressure, making brain wave frequency accelerate, motion feeling time value accelerate, blood sedimentation slow, making blood viscosity decrease, plasma protein, erythrocyte hemoglobin increase, making tissue oxidation process of kidney, liver, brain enhance, making lung oxygen uptake, carbon dioxide discharge function increase, reducing blood sugar and muscle lactic acid, improving reticuloendothelial system function, promoting in vivo synthesis and storage of vitamins, improving basal metabolism, promoting protein metabolism, strengthening immune system, and promoting health, biological growth and development. Clinical experience of air ion for treatment shows that the anion has obvious curative effect on some diseases. For example, it has effects of relieving mild symptoms and curing allergic hay fever (hay fever), bronchial asthma, upper respiratory mucositis, ulcerative stomatitis, atrophic rhinitis, hypertension, neurosis, migraine, insomnia and burn.
Disclosure of Invention
In order to solve the technical problems, the invention provides a filter material capable of releasing ecological negative ions and a preparation method thereof, the filter material has stronger adsorption performance, can effectively remove organic pollutants, inorganic dust and the like in air or water, and has a fine filtration effect; in addition, the filter material of the invention also has high-efficiency immobilization performance, the load is not easy to fall off, the release of ecological negative oxygen ions is lasting and stable, and the maximum quantity can reach 25000/cm3Can effectively remove organic pollutants in the air, such as formaldehyde and the like.
The specific technical scheme of the invention is as follows: a filtering material capable of releasing ecological anions is characterized in that the main body of the filtering material is a high-molecular air or water body filtering base material loaded with nanometer anion powder; the nano negative ion powder accounts for 0.01-10% of the total mass of the filtering material; the release amount of ecological negative ions of the filter material is 500-25000/cm3。
Preferably, the components of the nano negative ion powder are selected from one or more of tourmaline, opal and silicate minerals, wherein the tourmaline, opal and silicate minerals contain trace elements such as aluminum, sodium, iron, magnesium, lithium, boron and the like.
The negative ion powder compounded by the invention can not generate the phenomena of over-standard radioactivity and the like.
Preferably, the filter substrate is a non-woven fabric or a porous membrane made of chemical fiber; the chemical fiber is polyester fiber or cellulose fiber.
Preferably, the polyester-based fibers are PET fibers, PP fibers, PE fibers, PU fibers, or the like; the cellulose fiber is natural cellulose fiber and regenerated cellulose fiber.
Preferably, the natural cellulose fibers are selected from the group consisting of hemp, cotton; the regenerated cellulose fiber is selected from viscose fiber, Tencel fiber, Lyocell fiber, Modal fiber or bamboo fiber, etc.
A preparation method of a filter material comprises the following steps:
1) adding the negative ion powder, the inorganic dispersant and deionized water into a wet high-speed grinding machine, and grinding at a high speed for 0.5-5h to prepare the stable and uniform dispersion liquid containing the nanometer negative ion powder with the particle size of 10-100 nm.
2) And adding the stable and uniform dispersion liquid into the to-be-emulsified open-pore water-based adhesive, and stirring and emulsifying at a high speed to prepare the open-pore water-based adhesive emulsion with the nano negative ion powder content of 0.1-10 wt% and the adhesive solid content of 10-55 wt%.
3) Selecting a filtering base material, and carrying out multiple times of distributed point water jet operation on the filtering base material by adopting a gap type point water jet process for the open-pore water-based adhesive emulsion to obtain the filtering base material loaded with the nano negative ion powder.
4) Curing the filter base material obtained in the step 3) at the normal temperature of 120 ℃ for 3-15 min to obtain a finished product.
The self-compounded negative ion powder does not have the phenomenon of over-standard radioactivity and the like, and the released negative ions meet the requirements of ecological environmental protection, health care and treatment functions and can be released durably and stably; the open-pore water-based adhesive glue agent adopted by the invention has the following advantages: firstly, the secondary pollution and the harm to human body caused by other oily adhesives or other chemical reagents in the use process of the filter base material are overcome; the adhesive with open pores can generate more exposed points on the surface of the base material of the negative ion powder, so that the negative ion release effect is obviously improved compared with the common oily adhesive or other chemical reagents and the like; the invention adopts the intermittent dispersion type point spraying process method, which can not cause the blockage of the original pores of the filter substrate to influence the permeability of air or water, and compared with other process methods, the invention can also save a large amount of cost and reduce the discharge of waste water, waste gas and the like; the invention adopts the water-based adhesive, can be quickly cured within the range of normal temperature to 120 ℃, saves a large amount of energy required by drying compared with other processes, and saves a large amount of production cost.
Preferably, in step 1), the inorganic dispersant is:
one or a mixture of more of silicate or polyacrylic acid, wherein the concentration of the silicate or polyacrylic acid in the dispersion liquid is 0.1-3.0 wt%;
or one or a mixture of more of polyacrylic acid, the concentration of which in the dispersion liquid is 0.1-3.0 wt%;
or one or a mixture of more of alkali metal phosphates; the concentration of the dispersion liquid is 0.1-3.0 wt%;
or silicate or mixture of polyacrylic acid and alkali metal phosphate, and the concentration of the mixture in the dispersion is 0.1-3.0 wt%.
Preferably, the silicate is selected from the group consisting of water glass, KH-550, KH-560 and KH-570; the polyacrylic acid is selected from polyacrylic acid metal salt, potassium polyacrylate, sodium polyacrylate and the like; the alkali metal phosphate is selected from sodium tripolyphosphate, sodium hexametaphosphate, sodium pyrophosphate and the like.
The inorganic dispersant is mainly based on that negative ion powder is ground in water at high speed, corresponding active groups can be generated on the surface of the inorganic dispersant, and certain electronegativity can also be generated.
Preferably, in the step 2), the aqueous adhesive is one or a mixture of several of open-cell polyurethane, open-cell epoxy resin and open-cell acrylic resin aqueous adhesive.
Preferably, in the step 3), the intermittent point-jet water spraying process is an intermittent spraying method that sprays water upwards and downwards at the top or downwards or sprays water upwards and downwards at the bottom or sprays water simultaneously according to the material, area, flow speed and negative ion powder loading capacity of the filter substrate, and the interval is 0 to 20 seconds.
Compared with the prior art, the invention has the beneficial effects that:
1. the filtering material adopts the self-compounded healthy ecological anion powder and the water-based adhesive, so that the harm to human bodies and the environment is avoided, and the secondary pollution is avoided.
2. The filter material adopts the water-based adhesive with the open pores, has high-efficiency immobilization performance, basically exposes negative ion powder to contact with air, and has high release rate of ecological negative oxygen ions and lasting stability.
3. The filter material adopts the intermittent spot-spraying process technology and process, can effectively regulate and control the porosity and the anion release rate of the filter material, and has stable and reliable product quality.
4. The invention uses less negative ion powder and has high and lasting release amount, and the key is that the self-compounded negative ion powder, the open pore water-based adhesive and the proper gap type point spraying process technology are selected, firstly, the self-compounded nano negative ion release powder is adopted according to the influence factors of the mineral powder type, the particle size, the mutual compounding and the like on the release efficiency of the negative ions, and the self-compounded nano negative ion release powder has higher monomer negative ion release efficiency; secondly, because the water-based adhesive with the holes exposes most of the negative ion powder and directly contacts with air, the negative ion release effect is greatly improved, and the utilization rate of the negative ion powder is also greatly improved. However, the currently used adhesive without openings covers most of the negative ion powder under the surface film and cannot contact with air, which affects the negative ion release efficiency. In addition, the use of the water-based adhesive can firmly fix the anion powder on the surface of the filter substrate, the release effect cannot be obviously reduced after the anion powder is used for many times or cleaned or bent, and the common coupling agent process technology or after-finishing technology can not firmly fix the anion powder on the surface of the filter substrate, so that the use efficiency is lower and lower; and thirdly, the intermittent spot spraying process technology has three advantages of not blocking the pores and keeping the porosity of the filtering base material unchanged, uniformly dispersing the nano powder, having high and uniform base material anion release efficiency and stable product quality, and thirdly, not generating secondary pollution and saving the mass production cost.
5. In addition, some technical difficulties, such as the contradiction between the radioactivity of the negative ion powder and the release amount of the negative ions, are met and overcome in the research and development process of the technical scheme, the invention adopts several kinds of powder with the self-selected radioactivity meeting the requirements to carry out optimized compounding to prepare powder for releasing ecological negative ions, and adopts a wet grinding process to obtain nano-scale powder dispersion liquid for uniformly and stably dispersing the ecological negative ions; aiming at the difficulties that the negative ion powder is few in use and high in release amount and is durable, the invention adopts the water-based adhesive glue with the open pores as the load matrix, and because the adhesive with the open pores enables most of the negative ion powder to be basically exposed outside and directly contacted with air, the use ratio of the negative ion powder is greatly improved, the negative ion release effect is also greatly improved, and the non-open pore adhesive or other coupling agents cannot be realized. In addition, the water-based adhesive can firmly fix the anion powder on the surface of the filter substrate, the release effect can not be obviously reduced after the anion powder is used for many times or cleaned or bent, and the secondary pollution and the harm to the human body caused by other oily adhesives or other chemical reagents in the use process of the filter substrate are overcome; aiming at the difficulty that the performance of the filter base material is not influenced, the team finally selects an intermittent point spraying process method through processes of repeated attempts of dipping, tie dyeing, after finishing and the like, the method cannot cause the blockage of the pores of the filter base material to influence the permeability of air or water, saves a large amount of water and nano negative ion powder, hardly discharges waste water and waste gas, saves a large amount of production cost, and cannot cause damage to the base material. In addition, the intermittent spot spraying process technology has small and uniform spraying amount and can be cured within a range of normal temperature to 120 ℃ for several minutes, so that a large amount of energy and production cost can be saved.
6. The filtering material has the advantages of strong air permeability, no obstruction, difficult breakage, aging resistance, antibiosis, formaldehyde removal and the like, and can be applied to filtering systems of various air conditioners, air purifiers, vehicle-mounted tools, filtering systems in families and high buildings and the like.
Detailed Description
The present invention will be further described with reference to the following examples.
General examples
A filtering material capable of releasing ecological anions, the main body of which is a high molecular material air or water body filtering substrate loaded with nanometer anion powder; the nano negative ion powder accounts for 0.01-10% of the total mass of the filter material. The release amount of ecological negative ions of the filter material is 500-25000/cm3。
Wherein, the nanometer negative ion powder is prepared by compounding tourmaline, opal, silicate and the like.
The filter substrate is a non-woven fabric or a porous membrane prepared from chemical fiber; the chemical fiber is polyester fiber (PET fiber, PP fiber or PU fiber) or cellulose fiber (natural cellulose fiber or regenerated cellulose fiber). The natural cellulose fiber is selected from fibrilia and cotton; the regenerated cellulose fiber is selected from viscose fiber, Tencel fiber, Lyocell fiber, Modal fiber or bamboo fiber, etc.
The components of the nano negative ion powder are selected from one or more of tourmaline, opal and silicate minerals, wherein the tourmaline, opal and silicate minerals contain trace elements such as aluminum, sodium, iron, magnesium, lithium, boron and the like.
The preparation method of the filter material comprises the following steps:
1) adding the negative ion powder, the inorganic dispersant and deionized water into a wet high-speed grinding machine, and grinding at high speed for 0.5-5h to prepare the stable dispersion liquid containing the nano negative ion powder with the particle size of 10-100 nm.
Wherein the inorganic dispersant is:
one or a mixture of more of silicate or polyacrylic acid, wherein the concentration of the silicate or polyacrylic acid in the dispersion liquid is 0.1-3.0 wt%;
or one or a mixture of more of alkali metal phosphates; the concentration of the dispersion liquid is 0.1-3.0 wt%;
or a mixture of silicates and alkali metal phosphates, the concentration of which in the dispersion is 0.1 to 3.0 wt.%.
Said silicate is selected from the group consisting of water glass, KH-550, KH-560 and KH-570; the polyacrylic acid is selected from polyacrylic acid metal salts; the alkali metal phosphate is selected from sodium tripolyphosphate, sodium hexametaphosphate, sodium pyrophosphate and the like.
2) Adding the stable dispersion liquid into a to-be-emulsified open-cell aqueous adhesive (one or a mixture of more of open-cell polyurethane, open-cell epoxy resin and open-cell acrylic resin aqueous adhesives), stirring at a high speed, and emulsifying to obtain an open-cell aqueous adhesive emulsion with the nano negative ion powder content of 0.1-10 wt% and the adhesive solid content of 10-55 wt%;
3) selecting a filtering base material, and performing multiple intermittent dispersed point jet water spraying operations on the filtering base material by adopting an intermittent point jet water spraying process to obtain the filtering base material loaded with the nano negative ion powder. The intermittent point-jet water spraying process is characterized in that an intermittent spraying method of top-up-down spraying or bottom-up spraying or both spraying is adopted according to the material, the area, the flow operation speed and the negative ion powder loading capacity of a filter base material, and the interval is 0-20 seconds.
4) Curing the filter base material obtained in the step 3) at the normal temperature of 120 ℃ for 3-15 min to obtain a finished product.
Example 1
A filtering material capable of releasing ecological anions is characterized in that a main body of the filtering material is an air or water body filtering substrate made of a high polymer material and loaded with nanometer anion powder; the nano negative ion powder accounts for 0.3 percent of the total mass of the filter material. The average ecological negative ion release amount of the filter material is 5865/cm3。
Wherein the filter substrate is PET fiber.
The components of the nanometer negative ion powder are selected from tourmaline, opal and silicate minerals, and the ratio is 45: 35: 20.
The preparation method of the filter material comprises the following steps:
1) adding the anion powder, the inorganic dispersant and the deionized water into a wet high-speed grinder to grind for 2 hours at high speed, and preparing the stable dispersion liquid containing the nanometer anion powder with the particle size of about 50 nanometers.
Wherein the inorganic dispersant is KH-550 and sodium polyacrylate, and the concentrations of KH-550 and sodium polyacrylate in the stable dispersion are 0.3 wt% and 0.6 wt%, respectively;
2) adding the stable dispersion liquid into water-based open-cell polyurethane to be emulsified, stirring at a high speed and emulsifying to prepare open-cell water-based adhesive emulsion with the content of nano negative ion powder of 2 wt% and the solid content of the adhesive of 35 wt%;
3) selecting PET filter base materials, and adopting a flow process surface top-up-down spraying gap type spraying process, wherein the time interval between front spraying and back spraying is 10m seconds.
4) Curing the filter base material obtained in the step 3) at 80 ℃ for 5min to obtain a finished product.
Example 2
A filtering material capable of releasing ecological anions is characterized in that a main body of the filtering material is an air or water body filtering substrate made of a high polymer material and loaded with nanometer anion powder; the sodiumThe negative ion powder accounts for 0.5% of the total mass of the filter material. The average ecological negative ion release amount of the filter material is 8330/cm3。
Wherein the filter substrate is PET fiber.
The components of the nanometer negative ion powder are selected from tourmaline, opal and silicate minerals, and the ratio is 45: 35: 20.
The preparation method of the filter material comprises the following steps:
1) adding the anion powder, the inorganic dispersant and the deionized water into a wet high-speed grinder to grind for 2 hours at high speed, and preparing the stable dispersion liquid containing the nanometer anion powder with the particle size of about 50 nanometers.
Wherein the inorganic dispersant is KH-550 and sodium polyacrylate, and the concentrations of KH-550 and sodium polyacrylate in the stable dispersion are 0.5wt% and 0.8wt%, respectively;
2) adding the stable dispersion liquid into water-based open-cell polyurethane to be emulsified, stirring at a high speed and emulsifying to prepare open-cell water-based adhesive emulsion with the nano negative ion powder content of 2.5 wt% and the adhesive solid content of 40 wt%;
3) selecting PET filtering base materials, and adopting a flow process surface top-to-bottom spraying gap type spraying process, wherein the time interval between the front spraying and the back spraying is 15 seconds.
4) Curing the filter base material obtained in the step 3) at 80 ℃ for 5min to obtain a finished product.
Example 3
A filtering material capable of releasing ecological anions is characterized in that a main body of the filtering material is an air or water body filtering substrate made of a high polymer material and loaded with nanometer anion powder; the nano negative ion powder accounts for 0.7 percent of the total mass of the filter material. The average ecological negative ion release amount of the filter material is 12366/cm3。
Wherein the components of the nanometer negative ion powder are selected from tourmaline, opal and silicate minerals, and the ratio is 45: 35: 20.
The filtering base material is viscose fiber.
The preparation method of the filter material comprises the following steps:
1) adding the anion powder, the inorganic dispersant and the deionized water into a wet high-speed grinder to grind for 2 hours at high speed, and preparing the stable dispersion liquid containing the nanometer anion powder with the particle size of about 50 nanometers.
Wherein the inorganic dispersant is KH-550 and sodium polyacrylate, and the concentrations of KH-550 and sodium polyacrylate in the stable dispersion are 0.5wt% and 1.0wt%, respectively;
2) adding the stable dispersion liquid into water-based open-cell polyurethane to be emulsified, stirring at a high speed and emulsifying to prepare open-cell water-based adhesive emulsion with the nano negative ion powder content of 3.5wt% and the adhesive solid content of 42 wt%;
3) selecting viscose fiber filter base materials, and adopting a flow operation surface top-up-down spraying gap type spraying process, wherein the time interval between front spraying and back spraying is 15 seconds.
4) Curing the filter base material obtained in the step 3) at 100 ℃ for 5min to obtain a finished product.
Example 4
A filtering material capable of releasing ecological anions, the main body of which is a high molecular material air or water body filtering substrate loaded with nanometer anion powder; the nano negative ion powder accounts for 1.0 percent of the total mass of the filter material. The average ecological negative ion release amount of the filter material is 20228/cm3。
Wherein the components of the nanometer negative ion powder are selected from tourmaline, opal and silicate minerals, and the proportion is 50: 30: 20.
The filter substrate is PU fiber.
The preparation method of the filter material comprises the following steps:
1) adding the anion powder, the inorganic dispersant and the deionized water into a wet high-speed grinding machine, and grinding for 3h at high speed to prepare the stable dispersion liquid containing the nanometer anion powder with the particle size of 30-50 nanometers.
Wherein the inorganic dispersant is KH-550 and sodium polyacrylate, and the concentrations of KH-550 and sodium polyacrylate in the stable dispersion are 0.6 wt% and 1.2 wt%, respectively;
2) adding the stable dispersion liquid into water-based open-cell polyurethane to be emulsified, stirring at a high speed and emulsifying to prepare open-cell water-based adhesive emulsion with the nano negative ion powder content of 5wt% and the adhesive solid content of 45 wt%;
3) selecting PU fiber filter base materials, and adopting a top-bottom spraying gap type spraying process on the top of a flowing water operation surface, wherein the time interval between front spraying and back spraying is 20 seconds.
4) Curing the filter base material obtained in the step 3) at 80 ℃ for 5min to obtain a finished product.
Comparative example 1
The specific embodiment is the same as example 2 except that a commercially available negative ion powder was used as the negative ion powder. Specific test data are detailed in table 1.
Comparative example 2
The specific implementation scheme is the same as that of example 2, except that the negative ion powder is commercially available radioactive standard-exceeding negative ion powder. Specific test data are detailed in table 1.
Comparative example 3
The specific implementation scheme is the same as example 2, except that the construction process adopts 3 times of dipping of the filter substrate into the open pore water-based adhesive, and the specific test data are detailed in table 1. The scheme causes a large amount of adhesive waste and is not easy for large-scale production.
Comparative example 4
The specific implementation scheme is the same as that of example 2, except that the construction process adopts a continuous spraying process, and the specific test data are detailed in table 1. This scheme causes a large amount of adhesive to be wasted, improves manufacturing cost.
Comparative example 5
The specific embodiment is the same as example 2 except that the open-cell aqueous adhesive is replaced by a non-open-cell aqueous adhesive, and the specific test data are detailed in table 1.
Comparative example 6
The specific embodiment is the same as the embodiment 2, except that the open-cell water-based adhesive is replaced by a coupling agent KH570, and the specific test data are shown in Table 1. The scheme causes the infirm solidification of the product, the easy falling of the powder and the unstable product quality.
Comparative example 7
The specific embodiment is the same as example 2, except that the open-pore water-based adhesive is replaced by an oil-based adhesive, and the specific test data are shown in table 1.
TABLE 1 Table of quantitative comparison of examples and comparative examples
Figure GDA0003501527080000091
Figure GDA0003501527080000101
From the data, the negative ion powder which is purchased in the market at present mainly has the defects that the negative ion release is not high, or the radioactivity of the negative ion powder exceeds the standard, and the filtering base material applied to the human health needs to be compounded automatically according to the actual requirements, so that the requirements of health and environmental protection are met; the adopted open-pore water-based adhesive is obviously superior to common water-based adhesives, oil-based adhesives and coupling agents as a load carrier, and the data such as product quality and the like reach the best grade; the filtering material is loaded with the anion powder by adopting a dispersed point-spraying process technology, the product quality and effect are obviously superior to those of continuous point-spraying, dipping and other process technologies, and the permeability of the pore diameter is basically not influenced. Therefore, the invention adopts the self-compounded anion powder to carry out wet grinding to obtain the nano stable and uniform dispersion liquid, the nano stable and uniform dispersion liquid and the pore-opening water-based adhesive are emulsified into the water-based adhesive rich in the anion powder, and the water-based adhesive is loaded on the filter substrate by adopting the dispersed point-spraying process technology, so that the prepared filter material has the advantages of high anion release efficiency, strong air permeability, no obstruction, difficult breakage, ageing resistance, antibiosis, formaldehyde removal and other performances, and can be applied to various air conditioners, air purifiers, vehicle-mounted tools, filter systems in families, high buildings and other filter systems and water purification systems.
The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.

Claims (3)

1. A filter material capable of releasing ecological negative ions is characterized in that: the main body is a high molecular material air or water body filtering substrate loaded with nanometer anion powder; the nano negative ion powder accounts for 0.5 percent of the total mass of the filter material; the average ecological negative ion release amount of the filter material is 8330/cm3；
Wherein the filter substrate is PET fiber;
the components of the nano negative ion powder are selected from tourmaline, opal and silicate minerals, and the proportion is 45: 35: 20;
the preparation method of the filter material comprises the following steps:
1) adding the anion powder, the inorganic dispersant and the deionized water into a wet high-speed grinder to grind for 2 hours at high speed, and preparing stable dispersion liquid containing nano anion powder with the particle size of about 50 nanometers;
wherein the inorganic dispersant is KH-550 with a concentration of 0.5wt% and sodium polyacrylate with a concentration of 0.8wt% in the stable dispersion;
2) adding the stable dispersion liquid into water-based open-cell polyurethane to be emulsified, stirring at a high speed and emulsifying to prepare open-cell water-based adhesive emulsion with the nano negative ion powder content of 2.5 wt% and the adhesive solid content of 40 wt%;
3) selecting a PET filtering base material, and adopting a flow process surface top-to-bottom spraying gap type spraying process, wherein the time interval between the front spraying and the back spraying is 15 seconds;
4) curing the filter base material obtained in the step 3) at 80 ℃ for 5min to obtain a finished product.
2. A filter material capable of releasing ecological negative ions is characterized in that: the main body is a high molecular material air or water body filtering substrate loaded with nanometer anion powder; the nano negative ion powder accounts for 0.7 percent of the total mass of the filter material; the average ecological negative ion release amount of the filter material is 12366/cm3；
Wherein the components of the nano negative ion powder are selected from tourmaline, opal and silicate minerals, and the proportion is 45: 35: 20;
the filter base material is viscose;
the preparation method of the filter material comprises the following steps:
1) adding the anion powder, the inorganic dispersant and the deionized water into a wet high-speed grinder to grind for 2 hours at high speed, and preparing stable dispersion liquid containing nano anion powder with the particle size of about 50 nanometers;
wherein the inorganic dispersant is KH-550 with a concentration of 0.5wt% and sodium polyacrylate with a concentration of 1.0wt% in the stable dispersion;
2) adding the stable dispersion liquid into water-based open-cell polyurethane to be emulsified, stirring at a high speed and emulsifying to prepare open-cell water-based adhesive emulsion with the nano negative ion powder content of 3.5wt% and the adhesive solid content of 42 wt%;
3) selecting a viscose fiber filtering base material, and adopting a flow operation surface top-up-down spraying gap type spraying process, wherein the time interval between front spraying and back spraying is 15 seconds;
4) curing the filter base material obtained in the step 3) at 100 ℃ for 5min to obtain a finished product.
3. A filter material capable of releasing ecological negative ions is characterized in that: the main body is a high molecular material air or water body filtering substrate loaded with nanometer anion powder; the nano negative ion powder accounts for 1.0 percent of the total mass of the filter material; the average ecological negative ion release amount of the filter material is 20228/cm3；
Wherein the components of the nanometer negative ion powder are selected from tourmaline, opal and silicate minerals, and the proportion is 50: 30: 20;
the filter base material is PU fiber;
the preparation method of the filter material comprises the following steps:
1) adding the anion powder, the inorganic dispersant and the deionized water into a wet high-speed grinding machine, and grinding at high speed for 3h to prepare stable dispersion liquid containing the nanometer anion powder with the particle size of 30-50 nanometers;
wherein the inorganic dispersant is KH-550 with a concentration of 0.5wt% and sodium polyacrylate with a concentration of 0.8wt% in the stable dispersion;
2) adding the stable dispersion liquid into water-based open-cell polyurethane to be emulsified, stirring at a high speed and emulsifying to prepare open-cell water-based adhesive emulsion with the nano negative ion powder content of 5wt% and the adhesive solid content of 45 wt%;
3) selecting PU fiber filter base materials, and adopting a flow operation surface top-to-bottom gap spraying process, wherein the time interval between front spraying and back spraying is 20 seconds;
4) curing the filter base material obtained in the step 3) at 80 ℃ for 5min to obtain a finished product.
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CN111560198A (en) * 2020-04-17 2020-08-21 吴瑛 High-efficiency physical negative ion coating and preparation method thereof
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