CN105986480A - Protective coating, filter material, matrix, and preparation method for protective coating - Google Patents
Protective coating, filter material, matrix, and preparation method for protective coating Download PDFInfo
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- CN105986480A CN105986480A CN201510076536.6A CN201510076536A CN105986480A CN 105986480 A CN105986480 A CN 105986480A CN 201510076536 A CN201510076536 A CN 201510076536A CN 105986480 A CN105986480 A CN 105986480A
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Abstract
The invention relates to a preparation method for a protective coating. The preparation method comprises the following steps: preparing a mixed solution a containing 1 to 50 g/L of polyelectrolyte and 0.01 to 2 mol/L of strong electrolyte; allowing the mixed solution a to be formed on the surface of the matrix and microstructures in the matrix and drying the matrix; mixing 50 to 100 parts of polytetrafluoroethylene nanoparticle dispersion liquid with a mass fraction of 2 to 15% and 0 to 50 parts of polystyrene nanoparticle dispersion liquid with a mass fraction of 1 to 10% and carrying out stirring or ultrasonic dispersion so as to obtain a mixed solution b; allowing the mixed solution b to be formed on the surface of the matrix and the microstructures in the matrix and drying the matrix; and heating the matrix to 160 to 220 DEG C for baking so as to allow polystyrene particles to be fused and polytetrafluoroethylene particles to be cured, and then taking the matrix out for natural cooling. Moreover, the invention also relates to the protective coating, a filter material and the matrix.
Description
Technical field
The present invention relates to the preparation method of a kind of protective coating, filtrate, matrix and protective coating thereof.
Background technology
Haze problem has become as China, one of problem of environmental pollution that particularly Beijing-tianjin-hebei Region is the most serious.According to statistics, causing the PM2.5 of haze to have more than 20% and discharge from industrial smoke, such as thermal power plant, cement plant, garbage burning factory etc., the therefore flue gas purifying equipment of Promotion Transformation fume emission enterprise, be the mission critical of haze improvement.At present, industrial flue gas cleaning equipment presses technical point, mainly has two classes: a class is electrostatic precipitator technology, and a class is filter bag dedusting technology.Using the industrial smoke after electrostatic precipitation, granular material discharged concentration is typically at 50-100
mg/m
, minimum up to 15-30 mg/m, and using filter bag dedusting technology, granular material discharged concentration is generally less than 50 mg/m, minimum up to 0-5 mg/m.According to country New emission standard GB13223-2011, granular material discharged concentration is less than 20mg/m, so electricity bag combination or filter bag dedusting technology must be used just to stably reach requirement.
The core of filter bag dedusting technology is filtrate.As consumptive material, filtrate has certain life-span, and as a example by the polyphenylene sulfide high-temperature dust removal filtrate that coal-burning power plant is conventional, domestic life-span of filtering material is about 1-3, and import filter bag was up to more than 3 years.Extend life of bag filter and not only can be substantially reduced the cost of filter bag dedusting, the most also can extend the time of enterprise's stop production to overhaul, environmental transformation be carried out for relevant enterprise significant.In order to improve the service life of filtrate, many renowned companies both at home and abroad, such as Fu Sheng group, east filter bag, Bo Ge, Andrew, Bi Dafu etc., all use politef dipping technique that filtrate is processed, thus improve the oxidation resistance of filter bag, antiacid caustic corrosion ability, filter efficiency, deashing ability, thus extend its service life.But there are two significant drawbacks in existing politef dipping technique, one is that politef coverage rate is low, it is impossible to protect filter media fibre completely；Two is that politef is little with filter media fibre absorption affinity, and this politef is easy to fall off.Therefore this technology is limited to the lifting effect of life-span of filtering material at present.
Summary of the invention
In view of this, the preparation method of a kind of politef of necessary offer coverage rate high protective coating, filtrate, matrix and protective coating thereof strong with filter media fibre absorption affinity.
A kind of protective coating, this protective coating includes that a polyelectrolyte layer and a polytetrafluorethylenano nano granular layer, described polyelectrolyte layer and described polytetrafluorethylenano nano granular layer stacking are arranged.
A kind of filtrate, this filtrate includes filtrate matrix and is arranged at the protective coating of this filtrate matrix, and this protective coating includes that a polyelectrolyte layer and a polytetrafluorethylenano nano granular layer, described polyelectrolyte layer and described polytetrafluorethylenano nano granular layer stacking are arranged.
A kind of matrix, this matrix includes matrix bodies and is arranged at the protective coating of this matrix bodies, and this protective coating includes that a polyelectrolyte layer and a polytetrafluorethylenano nano granular layer, described polyelectrolyte layer and described polytetrafluorethylenano nano granular layer stacking are arranged.
The preparation method of a kind of protective coating, it comprises the following steps: configure mixed liquor a so that it is comprise the polyelectrolyte of 1 ~ 50 g/L, the strong electrolyte of 0.01 ~ 2 mol/L；Described mixed liquor a is formed in surface and the base internal micro structure of matrix, and this matrix is dried；Take the polytetrafluorethylenano nano particle dispersion that mass fraction is 2% ~ 15% of 50 ~ 100 parts, 0 ~ 50 part of mass fraction be 1% ~ 10% the mixing of polystyrene nanoparticles dispersion liquid, and be stirred or ultrasonic disperse, thus obtain mixed liquor b；Described mixed liquor b is formed in substrate surface and base internal micro structure, and described matrix is dried；Being warming up to 160 ~ 220 DEG C of bakings makes described granules of polystyrene melt, and makes polytetrafluoroethylgranule granule solidify, and takes out Temperature fall.
The preparation method of a kind of filtrate protective coating, it comprises the following steps: configure mixed liquor a so that it is comprise the polyelectrolyte of 1 ~ 50 g/L, the strong electrolyte of 0.01 ~ 2 mol/L；Described mixed liquor a is formed at the fiber surface within a filter material surface and this filtrate, and this filtrate is dried；Take the polytetrafluorethylenano nano particle dispersion that mass fraction is 2% ~ 15% of 50 ~ 100 parts, 0 ~ 50 part of mass fraction be 1% ~ 10% the mixing of polystyrene nanoparticles dispersion liquid, and be stirred or ultrasonic disperse, thus obtain mixed liquor b；Described mixed liquor b is formed at the fiber surface within filter material surface and this filtrate, and described filtrate is dried；Being warming up to 160 ~ 220 DEG C of bakings makes described granules of polystyrene melt, and makes polytetrafluoroethylgranule granule solidify, and takes out Temperature fall.
Compared with prior art, the protective coating that the present invention provides has the advantage that the coverage rate of politef in one, prepared protective coating is high, can improve the non-oxidizability of protective coating, acid-alkali-corrosive-resisting ability, intensity；Adhesion between two, prepared protective coating and matrix is strong；Three, described protective coating surface can be low, has superhydrophobic characteristic.
The protective coating preparation method that the present invention provides has the following advantages, and one, employing polyelectrolyte improve the adsorption of matrix and polytetrafluorethylenano nano granule, thus improve the polytetrafluorethylenano nano granule coverage rate at matrix surface；Its two, add polystyrene nanoparticles, and make it melt, form porous nanometer structure, and make granules of polystyrene be well fixed to matrix surface.
Accompanying drawing explanation
The flow chart of the preparation method of the filter media fibre protective coating that Fig. 1 embodiment of the present invention provides.
The structural representation of the protective coating that Fig. 2 embodiment of the present invention provides.
The structural representation of the protective coating that Fig. 3 another embodiment of the present invention provides.
Main element symbol description
| Polyelectrolyte layer | 10、20 |
| Polytetrafluorethylenano nano granular layer | 11、22 |
| Polystyrene layer | 21 |
| Matrix | 30 |
| Protective coating | 100、200 |
Following detailed description of the invention will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Detailed description of the invention
Below in conjunction with specific embodiment, technical scheme is stated the most in detail.
Refer to Fig. 1, the embodiment of the present invention provides the preparation method of a kind of protective coating, and it comprises the following steps:
Step 1: configuration mixed liquor a so that it is comprise the polyelectrolyte of 1 ~ 50 g/L, the strong electrolyte of 0.01 ~ 2 mol/L；
Step 2: described mixed liquor a is formed in a substrate surface and base internal micro structure, and this matrix is dried；
Step 3: take the polytetrafluorethylenano nano particle dispersion that mass fraction is 2% ~ 15% of 50 ~ 100 parts, 0 ~ 50 part of mass fraction be 1% ~ 10% the mixing of polystyrene nanoparticles dispersion liquid, and be stirred or ultrasonic disperse, thus obtain mixed liquor b；
Step 4: described mixed liquor b is formed in substrate surface and base internal micro structure, and described matrix is dried；
Step 5: be warming up to 160 ~ 220 DEG C of bakings and make described granules of polystyrene melt, make polytetrafluoroethylgranule granule solidify, takes out Temperature fall.
In step (1), described polyelectrolyte is can to ionize in polar solvent, make the polymer that macromolecular chain is charged, specifically include that polyacrylic acid, polymethylacrylic acid, polystyrolsulfon acid, polyvinyl sulfonic acid, polyvinyl, polyallylamine hydrochlorides, polymine, polyvinylamine, diallyl dimethyl ammoniumchloride, polyvinyl pyridine, Quadrafos, polysilicate etc..Described polyelectrolyte can select one, it is also possible to selects multiple being used in mixed way.Described strong electrolyte, i.e. great majority in addition to strong acid, highly basic can ionize out the salt electrolyte of ion under aqueous solution completely, mainly include sodium chloride, potassium chloride, manganese chloride, ammonium sulfate, sodium sulfate, potassium sulfate etc..Described strong electrolyte can select one, it is also possible to selects multiple being used in mixed way.
In step (2), described matrix can be immersed in described mixed liquor a and deposit a period of time, or described mixed liquor spray or is applied in the surface of described matrix, so that described matrix surface is formed with described mixed liquor b.Preferably, described matrix is immersed in described mixed liquor 5-20 minute, so that polyelectrolyte and strong electrolyte in described mixed liquor are adsorbed in the internal microstructure of described matrix.
The temperature and time of described drying does not limits.Preferably, described drying temperature is 60 DEG C～80 DEG C, and described drying time is 20 minutes～40 minutes.The purpose of described drying is to make solvent volatilize.
Described matrix can be various fiber and other porous materials, including: filter cloth, filter membrane, filter bag or filtration sponge etc..More specifically, described filter cloth include average pore size be less than 200 microns cotton, fiber crops, polypropylene, terylene, the filter cloth such as nylon；Described filter bag include polyphenylene sulfide, terylene, P84, glass, fluorine beautiful this, the filter bag of the material such as aramid fiber, polypropylene, polyester；Described filter membrane includes nylon, politef, composite fibre ester, Kynoar, the microporous filter membrane etc. of glass fiber material；Described filtration sponge includes fiber sponge, polyvinyl alcohol, polyurethane foam sponge etc..
In step (3), described polytetrafluorethylenano nano particle dispersion can be by being scattered in a solvent acquisition by described polytetrafluorethylenano nano granule, it is possible to is obtained by polymerizations such as suspension polymerisation, emulsion polymerizations.The particle diameter of described polytetrafluorethylenano nano granule can be 50 ~ 1000
Nm, it can exist with phases such as spherical particles, ellipsoidal particle, irregularly shaped particles, powder body, emulsion, concentration dispersion liquids.
Described polystyrene nanoparticles dispersion liquid can be by being scattered in a solvent acquisition by described polystyrene nanoparticles, it is also possible to is obtained by polymerizations such as suspension polymerisation, emulsion polymerizations.The particle diameter of described polystyrene nanoparticles can be 50
~1000 nm。
Described it is stirred or the time of ultrasonic disperse and form do not limit, as long as ensureing that described polytetrafluorethylenano nano granule and described polystyrene nanoparticles can realize dispersed.Preferably, the time 20～30 minutes of described ultrasonic disperse.
In step (4), described filtrate is immersed in described mixed liquor b and deposits a period of time, or described mixed liquor sprays or is applied in the surface of described matrix, so that described matrix surface is formed with described mixed liquor b.Preferably, described mixed liquor is sprayed to described matrix surface, makes matrix complete wetting, so that polytetrafluorethylenano nano granule and polystyrene nanoparticles in described mixed liquor b are adsorbed in the internal microstructure of described matrix.
The temperature and time of described drying does not limits.Preferably, described drying temperature is 60 DEG C～80 DEG C, and described drying time is 20 minutes～40 minutes.The purpose of described drying is to make solvent volatilize.
In step (5), the purpose of described baking is to make described polystyrene nanoparticles melt, and plays the effect that described polytetrafluorethylenano nano granule is bonded in described substrate surface, simultaneously works as effect particles cured for polytetrafluorethylenano nano.The time of described baking does not limits, as long as described polystyrene nanoparticles can be made to melt, makes polytetrafluorethylenano nano particles cured.Preferably, the time of described baking is more than 10 minutes.In baking process, the surface of described polytetrafluorethylenano nano granule has microfusion, but still can keep prototype.
Certainly, the matrix in the method can also be removed.
The protective coating preparation method that the present invention provides has the following advantages, and one, employing polyelectrolyte can improve the adsorption of matrix and polytetrafluorethylenano nano granule, thus improve the polytetrafluorethylenano nano granule coverage rate at matrix surface；Its two, add polystyrene nanoparticles, and make it melt, form porous nanometer structure, granules of polystyrene can be made to be well fixed to matrix surface.
The invention still further relates to a kind of protective coating obtained by above-mentioned preparation method, when in mixed liquor b without polystyrene nanoparticles dispersion liquid, it is thus achieved that protective coating 100.Refer to Fig. 2, described protective coating 100 includes that polyelectrolyte layer 10 and a polytetrafluorethylenano nano granular layer 11, described polyelectrolyte layer 10 and polytetrafluorethylenano nano granular layer 11 stacking are arranged.The arrangement compactness of described polytetrafluorethylenano nano granular layer 11 is higher, and the antioxidation of this protective coating, acid and alkali-resistance ability are higher.
The invention still further relates to a kind of another protective coating obtained by above-mentioned preparation method, when in mixed liquor b containing polystyrene nanoparticles dispersion liquid, it is thus achieved that protective coating 200.Described protective coating 200 is a structure with nanotopography.The structure of described nanotopography is relevant with the size of politef and polystyrene nanoparticles.Referring to Fig. 3, described protective coating 200 includes polyelectrolyte layer 20, polystyrene layer 21 and a polytetrafluorethylenano nano granular layer 22, and described polyelectrolyte layer 20 is arranged with described polystyrene layer 21 stacking.The thickness of described polyelectrolyte layer 20 is less than 100 nm.Described polystyrene layer 21 is arranged with described polytetrafluoroethylgranule granule layer 22 stacking, and the polytetrafluorethylenano nano granule in described polytetrafluoroethylene floor 22 is partially embedded in described polystyrene layer 21.The thickness of described polystyrene layer 21 is less than 500 nm.The thickness of described polytetrafluoroethylgranule granule layer 22 is 50 ~ 1000 nm.
Described protective coating 100,200 can be arranged at the surface of a matrix 30, or the surface of intrinsic silicon micro structure, so that the oxidation resistance of described matrix, acid-alkali-corrosive-resisting ability, intensity are improved.When protective coating 100,200 is arranged at the surface of described matrix 30; described polytetrafluorethylenano nano granule 23 is bonded in the surface of described matrix 30 by described polyelectrolyte layer 21 or described polystyrene layer 22 and described polyelectrolyte layer 21, and described polytetrafluorethylenano nano granular layer 22 is stronger with the adhesion of described matrix 30.
Described matrix can be various fiber and other porous materials, including: filter cloth, filter membrane, filter bag, filtration sponge etc..More specifically, described filter cloth includes the filter clothes such as cotton, fiber crops, polypropylene, terylene, nylon；Described filter bag include polyphenylene sulfide, terylene, P84, glass, fluorine beautiful this, the filter bag of the material such as aramid fiber, polypropylene, polyester；Described filter membrane includes nylon, politef, composite fibre ester, Kynoar, the microporous filter membrane etc. of glass fiber material；Described filtration sponge includes fiber sponge, polyvinyl alcohol, polyurethane foam sponge etc..
When described matrix is filtrate matrix, described protective coating 100,200 is arranged at surface and the surface of filtrate matrix fiber of filtrate matrix, and prepared filtrate protective coating coverage rate is high, can improve filtrate non-oxidizability, acid-alkali-corrosive-resisting ability, intensity；Two, prepared filter media fibre protective coating is strong with interfibrous adhesion, and resistance to soot dust granule washes away；Three, described filter media fibre protective coating surface can be low, has superhydrophobic characteristic, and ash-removal effect is good.
The protective coating that the present invention provides has the advantage that one, prepared protective coating coverage rate are high, can improve matrix non-oxidizability, acid-alkali-corrosive-resisting ability, intensity；Adhesion between two, prepared matrix protective coating and matrix is strong；Three, described matrix protective coating surface can be low, has superhydrophobic characteristic.
Embodiment 1:
Configuration mixed liquor a so that it is comprise 10
The polyelectrolyte of g/L and the sodium chloride of 0.1 mol/L, this polyelectrolyte is polyallylamine hydrochlorides and the mixed liquor of polyvinylamine 3:1 by volume composition；Polyphenylene sulfide filter cloth is totally submerged in this mixed liquor a, depositing 15 minutes, then polyphenylene sulfide filter cloth being taken out from mixed liquor a, hot-air seasoning, temperature 70 C, until thoroughly drying；Take polytetrafluoroethyldispersion dispersion that 80 parts of (volume fraction) mass fractions are 4%, 20 parts of mass fractions be 2% polystyrene dispersion liquid, it is configured to mixed liquor b, described polytetrafluorethylenano nano grain diameter is 200nm, and described polystyrene nanoparticles particle diameter is 50nm；Polyphenylene sulfide filter cloth after drying is immersed in mixed liquor b, thoroughly dries with hot blast, temperature 70 C after standing 15 minutes；Baking box put into by polyphenylene sulfide filter cloth after drying, is warming up to 180 degrees Celsius, toasts 15 minutes, takes out Temperature fall.Scanned electron microscope observation, the fiber surface in this polyphenylene sulfide filter cloth gathers polytetrafluorethylenano nano granule, coverage rate more than 90%, the coverage rate obtained far above tradition politef dipping technique.Frictional experiment shows, containing the described filtrate protective coating of polystyrene layer, the coating loss rate under same normal pressure and reciprocal time is much smaller than the described filtrate protective coating not containing polystyrene layer.The polyphenylene sulfide filter cloth surface with described filtrate protective coating presents superhydrophobic characteristic, and deashing ability significantly improves.
Embodiment 2
Configuration mixed liquor a so that it is comprise polyelectrolyte and the sodium chloride of 0.2 mol/L of 20g/L, this polyelectrolyte is kayexalate and the mixed liquor of diallyl dimethyl ammoniumchloride 1:2 by volume composition；Terylene filter cloth is totally submerged in this mixed liquor a, depositing 15 minutes, terylene filter cloth being taken out from mixed liquor a, hot-air seasoning, temperature 70 C, until thoroughly drying；Take polytetrafluoroethyldispersion dispersion that 70 parts of (volume fraction) mass fractions are 5%, 30 parts of mass fractions be 1% polystyrene dispersion liquid, it is configured to mixed liquor b, described polytetrafluorethylenano nano grain diameter is 200nm, and described polystyrene nanoparticles particle diameter is 200nm；Terylene filter cloth after drying is immersed in mixed liquor b, thoroughly dries with hot blast, temperature 70 C after standing 15 minutes；Baking box put into by terylene filter cloth after drying, is warming up to 190 degrees Celsius, toasts 15 minutes, takes out Temperature fall.Scanned electron microscope observation; fiber surface in this terylene filter cloth defines one layer of particle porous structure of uniform polytetrafluorethylenano nano; aperture is suitable with polystyrene nanoparticles particle diameter; overall coverage rate is far above tradition politef dipping technique; and the terylene filter cloth surface with described filtrate protective coating presents superhydrophobic characteristic, deashing ability significantly improves.
Embodiment 3
Configuration mixed liquor a so that it is comprise 20
The polyelectrolyte of g/L and the potassium chloride of 0.3mol/L, this polyelectrolyte is polyvinylamine；Polyphenylene sulfide filter cloth is totally submerged in this mixed liquor a, depositing 15 minutes, polyphenylene sulfide filter cloth being taken out from mixed liquor a, hot-air seasoning, temperature 70 C, until thoroughly drying；Taking 100 parts of (volume fraction) mass fractions is the polytetrafluoroethyldispersion dispersion of 3%, is configured to mixed liquor b, and described polytetrafluorethylenano nano grain diameter is 200nm；Mixed liquor b spray gun is uniformly sprayed to the polyphenylene sulfide filter cloth surface after drying, soaks completely to this polyphenylene sulfide filter cloth, thoroughly dry with hot blast after standing 15 minutes, temperature 70 C；Baking box put into by polyphenylene sulfide filter cloth after drying, is warming up to 180 degrees Celsius, toasts 15 minutes, takes out Temperature fall.Scanned electron microscope observation, the fiber surface in this polyphenylene sulfide filter cloth gathers polytetrafluorethylenano nano granule, coverage rate more than 95%, the coverage rate obtained far above tradition politef dipping technique.
Embodiment 4
Configuration mixed liquor a so that it is comprise 15
The polyelectrolyte of g/L and the ammonium sulfate of 0.5 mol/L, this polyelectrolyte is polymethylacrylic acid；Fiber sponge is totally submerged in this mixed liquor a, depositing 15 minutes, fiber sponge being taken out from mixed liquor a, hot-air seasoning, temperature 70 C, until thoroughly drying；Take polytetrafluoroethyldispersion dispersion that 70 parts of (volume fraction) mass fractions are 5%, 30 parts of mass fractions be 1% polystyrene dispersion liquid, it is configured to mixed liquor b, described polytetrafluorethylenano nano grain diameter is 200 nm, and described polystyrene nanoparticles particle diameter is 200
nm；Fiber sponge after drying is immersed in mixed liquor b, thoroughly dries with hot blast, temperature 70 C after standing 15 minutes；Fiber sponge after drying puts into baking box, is warming up to 200 degrees Celsius, toasts 15 minutes, takes out Temperature fall.Scanned electron microscope observation; fiber surface in this fiber sponge defines one layer of particle porous structure of uniform polytetrafluorethylenano nano; aperture is suitable with polystyrene nanoparticles particle diameter; overall coverage rate is far above tradition politef dipping technique; and the fiber sponge surface with described filtrate protective coating presents superhydrophobic characteristic, surface can be relatively low.
It addition, those skilled in the art can also do other change in spirit of the present invention, these changes done according to present invention spirit, all should be included in scope of the present invention.
Claims (13)
1. a protective coating, this protective coating includes that a polyelectrolyte layer and a polytetrafluorethylenano nano granular layer, described polyelectrolyte layer and described polytetrafluorethylenano nano granular layer stacking are arranged.
2. protective coating as claimed in claim 1; it is characterized in that; farther including a polystyrene layer, this polystyrene layer is arranged between described polyelectrolyte layer and polytetrafluorethylenano nano granular layer, and this polytetrafluorethylenano nano granule is partially embedded in described polystyrene layer.
3. protective coating as claimed in claim 2, it is characterised in that the thickness of described polyelectrolyte layer is less than 100nm, and the thickness of described polystyrene layer is less than 500nm, and the thickness of described polytetrafluorethylenano nano granular layer is 50～1000nm.
4. protective coating as claimed in claim 2, it is characterised in that described polystyrene layer is porous nanometer structure.
5. a filtrate; this filtrate includes filtrate matrix and is arranged at the protective coating of this filtrate matrix; this protective coating includes that a polyelectrolyte layer and a polytetrafluorethylenano nano granular layer, described polyelectrolyte layer and described polytetrafluorethylenano nano granular layer stacking are arranged.
6. filtrate as claimed in claim 5, it is characterized in that, described filtrate farther includes a polystyrene layer, and this polystyrene layer is arranged between described polyelectrolyte layer and polytetrafluorethylenano nano granular layer, and this polytetrafluorethylenano nano granule is partially embedded in described polystyrene layer.
7. a matrix; this matrix includes matrix bodies and is arranged at the protective coating of this matrix bodies; this protective coating includes that a polyelectrolyte layer and a polytetrafluorethylenano nano granular layer, described polyelectrolyte layer and described polytetrafluorethylenano nano granular layer stacking are arranged.
8. matrix as claimed in claim 7, it is characterized in that, described matrix farther includes a polystyrene layer, and this polystyrene layer is arranged between described polyelectrolyte layer and polytetrafluorethylenano nano granular layer, and this polytetrafluorethylenano nano granule is partially embedded in described polystyrene layer.
9. a preparation method for protective coating, it comprises the following steps:
Configuration mixed liquor a so that it is comprise the polyelectrolyte of 1 ~ 50 g/L, the strong electrolyte of 0.01 ~ 2 mol/L；
Described mixed liquor a is formed in surface and the base internal micro structure of matrix, and this matrix is dried；
Take the polytetrafluorethylenano nano particle dispersion that mass fraction is 2% ~ 15% of 50 ~ 100 parts, 0 ~ 50 part of mass fraction be 1% ~ 10% the mixing of polystyrene nanoparticles dispersion liquid, and be stirred or ultrasonic disperse, thus obtain mixed liquor b；
Described mixed liquor b is formed in substrate surface and base internal micro structure, and described matrix is dried；
Being warming up to 160 ~ 220 DEG C of bakings makes described granules of polystyrene melt, and makes polytetrafluoroethylgranule granule solidify, and takes out Temperature fall.
10. the preparation method of protective coating as claimed in claim 9; it is characterized in that; the particle diameter of the polytetrafluorethylenano nano granule in described polytetrafluorethylenano nano particle dispersion is 50 ~ 1000 nanometers, and in described polystyrene nanoparticles dispersion liquid, the particle diameter of polystyrene nanoparticles is 50 ~ 1000 nanometers.
The preparation method of 11. protective coatings as claimed in claim 9, it is characterised in that described matrix is fiber or porous material.
The preparation method of 12. 1 kinds of filtrate protective coatings, it comprises the following steps:
Configuration mixed liquor a so that it is comprise the polyelectrolyte of 1 ~ 50 g/L, the strong electrolyte of 0.01 ~ 2 mol/L；
Described mixed liquor a is formed at the fiber surface within a filter material surface and this filtrate, and this filtrate is dried；
Take the polytetrafluorethylenano nano particle dispersion that mass fraction is 2% ~ 15% of 50 ~ 100 parts, 0 ~ 50 part of mass fraction be 1% ~ 10% the mixing of polystyrene nanoparticles dispersion liquid, and be stirred or ultrasonic disperse, thus obtain mixed liquor b；
Described mixed liquor b is formed at the fiber surface within filter material surface and this filtrate, and described filtrate is dried；
Being warming up to 160 ~ 220 DEG C of bakings makes described granules of polystyrene melt, and makes polytetrafluoroethylgranule granule solidify, and takes out Temperature fall.
The preparation method of 13. filtrate protective coatings as claimed in claim 12, it is characterised in that described filtrate is filter cloth, filter membrane, filter bag or sponge.
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| CN113270594B (en) * | 2021-05-19 | 2022-11-18 | 郑州佛光发电设备股份有限公司 | Preparation method of waterproof breathable film, waterproof breathable film and application |
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