CN108465297A - A kind of preparation method of super-hydrophobic electret filter for air purification - Google Patents

A kind of preparation method of super-hydrophobic electret filter for air purification Download PDF

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Publication number
CN108465297A
CN108465297A CN201810192704.1A CN201810192704A CN108465297A CN 108465297 A CN108465297 A CN 108465297A CN 201810192704 A CN201810192704 A CN 201810192704A CN 108465297 A CN108465297 A CN 108465297A
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super
air
electret
cleaning function
hydrophobic
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欧阳业东
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欧阳业东
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D39/00Filtering material for liquid or gaseous fluids
    • B01D39/14Other self-supporting filtering material ; Other filtering material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0001Making filtering elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0028Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions provided with antibacterial or antifungal means

Abstract

The present invention provides a kind of preparation method of the super-hydrophobic electret with air-cleaning function, includes the following steps:Step 1):Spun-bonded non-woven fabrics pre-treatment;Step 2):Composite superfine nanometer alginate fibre;Step 3):Electrostatic spinning;Step 4):Low-surface energy substance surface modification is superimposed with composite filtering material and polytetrafluoroethylporous porous membrane.The present invention deposits high-flexibility, superfine nano fiber and composite superfine nanometer alginate fibre by the composition fiber surface in composite filtering material, electrospinning processing is carried out to composite filtering material again, keep charge in filtrate uniform, stable, super-hydrophobic processing is carried out to composite filtering material later, by low-surface energy substance to the surface modification of composite filtering material and polytetrafluoroethylporous porous membrane, make composite filtering material and polytetrafluoroethylporous porous membrane that there is super-hydrophobicity, composite filtering material and polytetrafluoroethylporous porous membrane are superimposed again, you can obtain the excellent electret of strainability.

Description

A kind of preparation method of super-hydrophobic electret filter for air purification
Technical field
The invention belongs to material for air purification technical fields, and in particular to a kind of that there is the super-hydrophobic of air-cleaning function to stay The preparation method of polar body.
Background technology
With progress of the epoch, requirement of the people to environmental quality is higher and higher.But economic fast development exacerbates ring The pollution in border, dust, chemical substance, harmful microorganism etc. in air produce harmful effect to people's health.Therefore, have Harmful substance in effect control air is that have significant problem to be solved.
The application of air filter and filtering material is to purify the important means of air.Normal air filtering material is for thin The removal of little particulate is not thorough enough, and is easy to multiply harmful microorganism on filtering material, and there are the possibility of secondary pollution.And it stays Polar body air filting material provides possibility to solve this problem.By carrying out electrostatic electret processing to air filting material, Make in material can standby storage space charge and dipole charge, trap the performances such as grit using the electrostatic force of charge, make Electret air filtering material has many advantages, such as efficient, low-resistance, energy saving.But existing electret air filtering material charge is deposited Store up that performance is general, and performance is not sufficiently stable, and charge is easily decayed, the characteristic parameter of this and electret air filtering material has very high point System, including the thickness of the molecular structure of the surface texture of material, material, material and filler etc..
Common electrostatic electret method has corona discharge, electrostatic spinning and thermal poling etc., wherein electrostatic spinning to utilize high pressure Electricity injects a large amount of space charges in fiber in spinning process, and space charge is easily captured by the deep trap of fibrous inside, simultaneously It can induce dipole polarization and generate polarization charge, and then electret filter material is made.But electret filter material use and During storage, since moisture present in air and particle etc. are in direct contact with electret so that in electret material Surface charge loss is accelerated, and to make the decaying of electret effect become faster, it is unstable to eventually lead to media filtration efficiency.
Invention content
Based on the above prior art, the purpose of the present invention is to provide a kind of super-hydrophobic electrets with air-cleaning function The preparation method of body deposits high-flexibility, superfine nano fiber and composite superfine by the composition fiber surface in composite filtering material Nanometer alginate fibre, then electrospinning processing is carried out to composite filtering material, keep charge in filtrate uniform, stable, later to composite filter Material and polytetrafluoroethylporous porous membrane are modified by low-surface energy substance, so that composite filtering material and polytetrafluoroethylporous porous membrane is had super thin It is aqueous, then composite filtering material and polytetrafluoroethylporous porous membrane are superimposed, you can obtain the excellent electret of strainability.
In order to achieve the goal above, the technical solution adopted by the present invention is:It is a kind of super-hydrophobic with air-cleaning function The preparation method of electret, includes the following steps:
Step 1):Spun-bonded non-woven fabrics pre-treatment
Step 1.1):Titanium dioxide nanofiber or nanometer activated carbon fiber are added in ethyl alcohol, and ultrasonic disperse, are obtained Uniform dispersion liquid;
Step 1.2):Spun-bonded non-woven fabrics are impregnated in the dispersion liquid of titanium dioxide nanofiber or nanometer activated carbon fiber Drying is taken out afterwards, and the spun-bonded non-woven fabrics base material of surface deposition of titanium oxide nanofiber or nanometer activated carbon fiber is made;
Step 2):Composite superfine nanometer alginate fibre
Step 2.1):Polyvinyl butyral solution is first prepared, high speed then is added in itself and superfine nano alginate fibre Disperseed in beater, obtains uniform superfine nano alginate fibre dispersion liquid;
Step 2.2):Spun-bonded non-woven fabrics base material made from step 1) is soaked in the superfine nano alginate fibre dispersion liquid It takes out, dries after bubble, obtain the composite filtering material of fiber surface deposition superfine nano alginate fibre;
Step 3):Electrostatic spinning
Step 3.1):Inorganic electret nano-particle is added in solvent, ultrasonic vibration is uniformly dispersed, and obtains inorganic electret The evenly dispersed dispersion liquid of body nano-particle;
Step 3.2):Polymer is added in the dispersion liquid, stirring and dissolving is uniform, is configured to polymer solution;
Step 3.3):Polymer solution is prepared in by electrostatic spinning on composite filtering material made from step 2), is obtained The composite filtering material of even deposited polymer nanofiber;
Step 4):Surface modification and overlapping
Step 4.1):Low-surface energy substance is dissolved in solvent, low-surface-energy solution is obtained;
Step 4.2):Composite filtering material surface obtained by low-surface-energy solution spraying to step 3) is surface modified;
Step 4.3):Polytetrafluoroethylporous porous membrane is impregnated in after being impregnated in low-surface-energy solution and is taken out, dried;
Step 4.4):Composite filtering material after modification and polytetrafluoroethylene (PTFE) prepared by step 4.2) and step 4.3) is more Pore membrane is superimposed, and the super-hydrophobic electret with air-cleaning function is made.
Further, the inorganic electret nano-particle is silica, titanium dioxide, barium titanate, silicon nitride or electricity Gas stone.
Further, solvent is N-N dimethylformamides, butanone, tetrahydrofuran, dichloromethane and first in the step 3) The mixing of one or more of base pyrrolidones.
Further, correspondence is as follows respectively for the polymer and solvent:
Kynoar:N-N dimethylformamides and butanone mass ratio are 1:1 mixed solvent;
Polyvinyl chloride:N-N dimethylformamides and tetrahydrofuran mass ratio are 1:1 mixed solvent;
Polyacrylonitrile:N-N dimethylformamides;
Makrolon:Dichloromethane;
Polyetherimide:N-N dimethylformamides and methyl pyrrolidone mass ratio are 1:1 mixed solvent;
Polystyrene:N-N dimethylformamides and tetrahydrofuran mass ratio are 3:1 mixed solvent;
Polyurethane:Butanone.
Further, the process conditions of electrostatic spinning are in the step 3):Voltage 10-30KV receives distance 5-25cm, Injection speed 1-5m L/h, 0-35 DEG C of temperature, relative humidity 0-70%.
Further, low-surface energy substance described in the step 4) be stearic acid, hexadecyl trimethoxy silane, 1H, 1H, 2H, 2H- perfluoroalkyl triethoxysilane or 1H, 1H, 2H, 2H- perfluoroalkyl trichlorosilanes;The solvent is nail Alcohol or ethyl alcohol.
Further, correspondence is as follows respectively for the low-surface energy substance and solvent:
Stearic acid:Ethyl alcohol;
Hexadecyl trimethoxy silane:Methanol;
1H, 1H, 2H, 2H- perfluoroalkyl triethoxysilane:Ethyl alcohol;
1H, 1H, 2H, 2H- perfluoroalkyl trichlorosilane:Ethyl alcohol.
As obtained by the preparation method of the above-mentioned super-hydrophobic electret with air-cleaning function with air purification The super-hydrophobic electret of function, the superposition number of plies are 2-10 layers.
As obtained by the preparation method of the above-mentioned super-hydrophobic electret with air-cleaning function with air purification The super-hydrophobic electret of function, which is characterized in that 0.02~10 μm of the super-hydrophobic electret pair with air-cleaning function Particle filter efficiency up to 99.999% or more.
Compared with prior art, the invention has the advantages that:
High-flexibility, superfine nano fiber are deposited by the composition fiber surface in composite filtering material, is formed on main fibre Lamination material containing " dividing shape secondary structure ", main body crude fibre there is preferable filtering to imitate the larger particle of grain size Fruit is formed simultaneously larger aperture structure and is conducive to passing through for air-flow, and two level fractal structure have for ultra-fine grain it is excellent Different strainability, while its more soft characteristic so that have high-speed flow by when will not generate barrier effect to air-flow, To which the increase of resistance pressure drop will not be caused.
In filter material surface composite superfine nanometer alginate fibre, adhesive is used as by polyvinyl butyral solution, it is ultra-fine Nanometer alginate fibre is adhered to the composition fiber surface of composite filtering material, and superfine nano alginate fibre can generate anion, and sea Algae fiber, which contains minerals, can release α waves, make popular feeling border loose and have comfort;In addition, polyethanol butyral is with hydrophobic Property, it can assign composite filtering material certain hydrophobic to that can be formed in composite filtering material composition fiber surface after composite filtering material immersion treatment Property.
Electrospinning processing is carried out to composite filtering material, make in filtrate charge uniformly, stablize, composite filtering material is surpassed later Hydrophobic treatment.By low-surface energy substance to the surface modification of composite filtering material and polytetrafluoroethylporous porous membrane, make composite filtering material and Polytetrafluoroethylporous porous membrane has super-hydrophobicity, then composite filtering material and polytetrafluoroethylporous porous membrane are superimposed, you can enhancing is stayed The sterilization of electret material, strainability.
Description of the drawings
Fig. 1 is the super-hydrophobic electret structural schematic diagram with air-cleaning function prepared by the embodiment of the present invention 1;
Wherein:1 is the composite filtering material after modification, and 2 be polytetrafluoroethylporous porous membrane.
Specific implementation mode
With reference to specific embodiment, invention is further described in detail.
Embodiment 1
A kind of preparation method of the super-hydrophobic electret with air-cleaning function, includes the following steps:
Step 1):Spun-bonded non-woven fabrics pre-treatment
Step 1.1):Titanium dioxide nanofiber is added in ethyl alcohol, and ultrasonic disperse, obtains uniform dispersion liquid;
Step 1.2):Drying is taken out after spun-bonded non-woven fabrics are impregnated in the dispersion liquid of titanium dioxide nanofiber, is made The spun-bonded non-woven fabrics base material of surface deposition of titanium oxide nanofiber;
Step 2):Composite superfine nanometer alginate fibre
Step 2.1):Polyvinyl butyral solution is first prepared, high speed then is added in itself and superfine nano alginate fibre Disperseed in beater, obtains uniform superfine nano alginate fibre dispersion liquid;
Step 2.2):Spun-bonded non-woven fabrics base material made from step 1) is soaked in the superfine nano alginate fibre dispersion liquid It takes out, dries after bubble, obtain the composite filtering material of fiber surface deposition superfine nano alginate fibre;
Step 3):Electrostatic spinning
Step 3.1):It is 1 that N-N dimethylformamides and butanone mass ratio, which is added, in nano-silicon dioxide particle:1 mixing In solvent, ultrasonic vibration is uniformly dispersed, and obtains the evenly dispersed dispersion liquid of nano-silicon dioxide particle;
Step 3.2):Kynoar is added in the dispersion liquid, stirring and dissolving is uniform, and it is molten to be configured to Kynoar Liquid;
Step 3.3):Kynoar solution is prepared in by electrostatic spinning on composite filtering material made from step 2), it is quiet The process conditions of Electrospun are:Voltage 20KV receives distance 15cm, injection speed 2m L/h, 20 DEG C of temperature, relative humidity 40% It is obtain a homogeneously deposited the composite filtering material of polyvinylidene fluoride nanometer fiber;
Step 4):Surface modification and overlapping
Step 4.1):Stearic acid is dissolved in ethyl alcohol, low-surface-energy solution is obtained;
Step 4.2):Composite filtering material surface obtained by low-surface-energy solution spraying to step 3) is surface modified;
Step 4.3):Polytetrafluoroethylporous porous membrane is impregnated in after being impregnated in low-surface-energy solution and is taken out, dried;
Step 4.4):Composite filtering material 1 and polytetrafluoroethylene (PTFE) after modification prepared by step 4.2) and step 4.3) Perforated membrane 2 is superimposed, as shown in Figure 1, the super-hydrophobic electret with air-cleaning function that the number of plies is 10 layers is made.
Embodiment 2
A kind of preparation method of the super-hydrophobic electret with air-cleaning function, includes the following steps:
Step 1):Spun-bonded non-woven fabrics pre-treatment
Step 1.1):Nanometer activated carbon fiber is added in ethyl alcohol, and ultrasonic disperse, obtains uniform dispersion liquid;
Step 1.2):Drying is taken out after spun-bonded non-woven fabrics are impregnated in the dispersion liquid of nanometer activated carbon fiber, and table is made Face deposits the spun-bonded non-woven fabrics base material of nanometer activated carbon fiber;
Step 2):Composite superfine nanometer alginate fibre
Step 2.1):Polyvinyl butyral solution is first prepared, high speed then is added in itself and superfine nano alginate fibre Disperseed in beater, obtains uniform superfine nano alginate fibre dispersion liquid;
Step 2.2):Spun-bonded non-woven fabrics base material made from step 1) is soaked in the superfine nano alginate fibre dispersion liquid It takes out, dries after bubble, obtain the composite filtering material of fiber surface deposition superfine nano alginate fibre;
Step 3):Electrostatic spinning
Step 3.1):It is 1 that N-N dimethylformamides and tetrahydrofuran mass ratio, which is added, in nano-titania particle:1 In the mixed solvent, ultrasonic vibration are uniformly dispersed, and obtain the evenly dispersed dispersion liquid of nano-titania particle;
Step 3.2):Polyvinyl chloride is added in the dispersion liquid, stirring and dissolving is uniform, is configured to polyvinyl chloride solution;
Step 3.3):Polyvinyl chloride solution is prepared in by electrostatic spinning on composite filtering material made from step 2), electrostatic The process conditions of spinning are:Voltage 30KV receives distance 25cm, and injection speed 5m L/h, 20 DEG C of temperature, relative humidity 40% must To the composite filtering material of uniform deposition polyvinyl chloride nano fiber;
Step 4):Surface modification and overlapping
Step 4.1):Hexadecyl trimethoxy silane is dissolved in methanol, low-surface-energy solution is obtained;
Step 4.2):Composite filtering material surface obtained by low-surface-energy solution spraying to step 3) is surface modified;
Step 4.3):Polytetrafluoroethylporous porous membrane is impregnated in after being impregnated in low-surface-energy solution and is taken out, dried;
Step 4.4):Composite filtering material after modification and polytetrafluoroethylene (PTFE) prepared by step 4.2) and step 4.3) is more Pore membrane is superimposed, and the super-hydrophobic electret with air-cleaning function that the number of plies is 10 layers is made.
Embodiment 3
A kind of preparation method of the super-hydrophobic electret with air-cleaning function, includes the following steps:
Step 1):Spun-bonded non-woven fabrics pre-treatment
Step 1.1):Nanometer activated carbon fiber is added in ethyl alcohol, and ultrasonic disperse, obtains uniform dispersion liquid;
Step 1.2):Drying is taken out after spun-bonded non-woven fabrics are impregnated in the dispersion liquid of nanometer activated carbon fiber, and table is made Face deposits the spun-bonded non-woven fabrics base material of nanometer activated carbon fiber;
Step 2):Composite superfine nanometer alginate fibre
Step 2.1):Polyvinyl butyral solution is first prepared, high speed then is added in itself and superfine nano alginate fibre Disperseed in beater, obtains uniform superfine nano alginate fibre dispersion liquid;
Step 2.2):Spun-bonded non-woven fabrics base material made from step 1) is soaked in the superfine nano alginate fibre dispersion liquid It takes out, dries after bubble, obtain the composite filtering material of fiber surface deposition superfine nano alginate fibre;
Step 3):Electrostatic spinning
Step 3.1):Nano barium phthalate particle is added in N-N dimethylformamides, ultrasonic vibration is uniformly dispersed, and obtains The dispersion liquid of nano barium phthalate uniform particle dispersion;
Step 3.2):Polyacrylonitrile is added in the dispersion liquid, stirring and dissolving is uniform, is configured to polyacrylonitrile solution;
Step 3.3):Polyacrylonitrile solution is prepared in by electrostatic spinning on composite filtering material made from step 2), electrostatic The process conditions of spinning are:Voltage 30KV receives distance 25cm, and injection speed 5m L/h, 25 DEG C of temperature, relative humidity 50% must To the composite filtering material of uniform deposition polyacrylonitrile nanofiber;
Step 4):Surface modification and overlapping
Step 4.1):Hexadecyl trimethoxy silane is dissolved in methanol, low-surface-energy solution is obtained;
Step 4.2):Composite filtering material surface obtained by low-surface-energy solution spraying to step 3) is surface modified;
Step 4.3):Polytetrafluoroethylporous porous membrane is impregnated in after being impregnated in low-surface-energy solution and is taken out, dried;
Step 4.4):Composite filtering material after modification and polytetrafluoroethylene (PTFE) prepared by step 4.2) and step 4.3) is more Pore membrane is superimposed, and the super-hydrophobic electret with air-cleaning function that the number of plies is 10 layers is made.
Comparative example 1
A kind of preparation method of the super-hydrophobic electret with air-cleaning function, includes the following steps:
Step 1):Spun-bonded non-woven fabrics pre-treatment
Step 1.1):Nanometer activated carbon fiber is added in ethyl alcohol, and ultrasonic disperse, obtains uniform dispersion liquid;
Step 1.2):Drying is taken out after spun-bonded non-woven fabrics are impregnated in the dispersion liquid of nanometer activated carbon fiber, and table is made Face deposits the spun-bonded non-woven fabrics base material of nanometer activated carbon fiber;
Step 2):Electrostatic spinning
Step 2.1):Nano barium phthalate particle is added in N-N dimethylformamides, ultrasonic vibration is uniformly dispersed, and obtains The dispersion liquid of nano barium phthalate uniform particle dispersion;
Step 2.2):Polyacrylonitrile is added in the dispersion liquid, stirring and dissolving is uniform, is configured to polyacrylonitrile solution;
Step 2.3):Polyacrylonitrile solution is prepared in by electrostatic spinning on base material made from step 1), electrostatic spinning Process conditions be:Voltage 30KV receives distance 25cm, and injection speed 5m L/h, 25 DEG C of temperature, relative humidity 50% obtains The composite filtering material of even deposition polyacrylonitrile nanofiber;
Step 3):Surface modification and overlapping
Step 3.1):Hexadecyl trimethoxy silane is dissolved in methanol, low-surface-energy solution is obtained;
Step 3.2):Composite filtering material surface obtained by low-surface-energy solution spraying to step 3) is surface modified;
Step 3.3):Polytetrafluoroethylporous porous membrane is impregnated in after being impregnated in low-surface-energy solution and is taken out, dried;
Step 3.4):Composite filtering material after modification and polytetrafluoroethylene (PTFE) prepared by step 4.2) and step 4.3) is more Pore membrane is superimposed, and the super-hydrophobic electret with air-cleaning function that the number of plies is 10 layers is made.
Comparative example 2
A kind of preparation method of the super-hydrophobic electret with air-cleaning function, includes the following steps:
Step 1):Spun-bonded non-woven fabrics pre-treatment
Step 1.1):Nanometer activated carbon fiber is added in ethyl alcohol, and ultrasonic disperse, obtains uniform dispersion liquid;
Step 1.2):Drying is taken out after spun-bonded non-woven fabrics are impregnated in the dispersion liquid of nanometer activated carbon fiber, and table is made Face deposits the spun-bonded non-woven fabrics base material of nanometer activated carbon fiber;
Step 2):Composite superfine nanometer alginate fibre
Step 2.1):Polyvinyl butyral solution is first prepared, high speed then is added in itself and superfine nano alginate fibre Disperseed in beater, obtains uniform superfine nano alginate fibre dispersion liquid;
Step 2.2):Spun-bonded non-woven fabrics base material made from step 1) is soaked in the superfine nano alginate fibre dispersion liquid It takes out, dries after bubble, obtain the composite filtering material of fiber surface deposition superfine nano alginate fibre;
Step 3):Electrostatic spinning
Step 3.1):Nano barium phthalate particle is added in N-N dimethylformamides, ultrasonic vibration is uniformly dispersed, and obtains The dispersion liquid of nano barium phthalate uniform particle dispersion;
Step 3.2):Polyacrylonitrile is added in the dispersion liquid, stirring and dissolving is uniform, is configured to polyacrylonitrile solution;
Step 3.3):Polyacrylonitrile solution is prepared in by electrostatic spinning on composite filtering material made from step 2), electrostatic The process conditions of spinning are:Voltage 30KV receives distance 25cm, and injection speed 5m L/h, 25 DEG C of temperature, relative humidity 50% must To the composite filtering material of uniform deposition polyacrylonitrile nanofiber;
Step 4):Surface modification and overlapping
Step 4.1):Hexadecyl trimethoxy silane is dissolved in methanol, low-surface-energy solution is obtained;
Step 4.2):Composite filtering material surface obtained by low-surface-energy solution spraying to step 3) is surface modified;
Step 4.3):Composite filtering material after modification prepared by step 4.2) is overlapped, the tool that the number of plies is 10 layers is made There is the super-hydrophobic electret of air-cleaning function.
To pair of above-described embodiment 1 to 3 and comparative example 1 and the 2 super-hydrophobic electrets obtained with air-cleaning function Filter efficiency, pressure drag, hydrophobicity and the Negative ion disengagement of 0.02~10 μm of particle are tested.
By above-mentioned test result it is found that 0.02~10 μm of super-hydrophobic electret pair made from the embodiment of the present invention 1 to 3 The filter efficiency of particle has excellent hydrophobicity and long-acting negative ion releasing function up to 99.999% or more, therefore energy Enough enhance the stability of electret filter, and air can be purified to improve indoor environment.Super-hydrophobic electret prepared by comparative example 1 The filter efficiency of particle is poor compared with embodiment 1 to 3, and does not have Negative ion disengagement, it was demonstrated that filter material surface composite superfine is received Rice alginate fibre, can generate anion, purify air;Comparative example 2 prepare super-hydrophobic electret particle filter efficiency compared with Embodiment 1 to 3 is poor, it was demonstrated that in the overlapping of polytetrafluoroethylporous porous membrane, can enhance the filter efficiency of electret particle.
Finally it should be noted that:The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used With technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features. All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in the present invention's Within protection domain.

Claims (9)

1. a kind of preparation method of the super-hydrophobic electret with air-cleaning function, which is characterized in that include the following steps:
Step 1):Spun-bonded non-woven fabrics pre-treatment
Step 1.1):Titanium dioxide nanofiber or nanometer activated carbon fiber are added in ethyl alcohol, and ultrasonic disperse, are obtained uniformly Dispersion liquid;
Step 1.2):It is taken after spun-bonded non-woven fabrics are impregnated in the dispersion liquid of titanium dioxide nanofiber or nanometer activated carbon fiber Go out drying, the spun-bonded non-woven fabrics base material of surface deposition of titanium oxide nanofiber or nanometer activated carbon fiber is made;
Step 2):Composite superfine nanometer alginate fibre
Step 2.1):Polyvinyl butyral solution is first prepared, high speed then, which is added, with superfine nano alginate fibre in it is beaten Disperseed in machine, obtains uniform superfine nano alginate fibre dispersion liquid;
Step 2.2):After spun-bonded non-woven fabrics base material made from step 1) is impregnated in the superfine nano alginate fibre dispersion liquid It takes out, drying, obtains the composite filtering material of fiber surface deposition superfine nano alginate fibre;
Step 3):Electrostatic spinning
Step 3.1):Inorganic electret nano-particle is added in solvent, ultrasonic vibration is uniformly dispersed, and obtains inorganic electret and receives The evenly dispersed dispersion liquid of rice corpuscles;
Step 3.2):Polymer is added in the dispersion liquid, stirring and dissolving is uniform, is configured to polymer solution;
Step 3.3):Polymer solution is prepared in by electrostatic spinning on composite filtering material made from step 2), is uniformly sunk The composite filtering material of product polymer nanofiber;
Step 4):Surface modification and overlapping
Step 4.1):Low-surface energy substance is dissolved in solvent, low-surface-energy solution is obtained;
Step 4.2):Composite filtering material surface obtained by low-surface-energy solution spraying to step 3) is surface modified;
Step 4.3):Polytetrafluoroethylporous porous membrane is impregnated in after being impregnated in low-surface-energy solution and is taken out, dried;
Step 4.4):Composite filtering material and polytetrafluoroethylporous porous membrane after modification prepared by step 4.2) and step 4.3) It is superimposed, the super-hydrophobic electret with air-cleaning function is made.
2. the preparation method of the super-hydrophobic electret according to claim 1 with air-cleaning function, which is characterized in that The inorganic electret nano-particle is silica, titanium dioxide, barium titanate, silicon nitride or tourmaline.
3. the preparation method of the super-hydrophobic electret according to claim 1 with air-cleaning function, which is characterized in that Solvent in the step 3) is in N-N dimethylformamides, butanone, tetrahydrofuran, dichloromethane and methyl pyrrolidone One or more kinds of mixing.
4. the preparation method of the super-hydrophobic electret according to claim 3 with air-cleaning function, which is characterized in that Correspondence is as follows respectively for the polymer and solvent:
Kynoar:N-N dimethylformamides and butanone mass ratio are 1:1 mixed solvent;
Polyvinyl chloride:N-N dimethylformamides and tetrahydrofuran mass ratio are 1:1 mixed solvent;
Polyacrylonitrile:N-N dimethylformamides;
Makrolon:Dichloromethane;
Polyetherimide:N-N dimethylformamides and methyl pyrrolidone mass ratio are 1:1 mixed solvent;
Polystyrene:N-N dimethylformamides and tetrahydrofuran mass ratio are 3:1 mixed solvent;
Polyurethane:Butanone.
5. the preparation method of the super-hydrophobic electret according to claim 1 with air-cleaning function, which is characterized in that The process conditions of electrostatic spinning are in the step 3):Voltage 10-30KV receives distance 5-25cm, injection speed 1-5m L/h, 0-35 DEG C of temperature, relative humidity 0-70%.
6. the preparation method of the super-hydrophobic electret according to claim 1 with air-cleaning function, which is characterized in that Low-surface energy substance described in the step 4) is stearic acid, hexadecyl trimethoxy silane, 1H, 1H, 2H, 2H- perfluoroparaffins Ethyl triethoxy silicane alkane or 1H, 1H, 2H, 2H- perfluoroalkyl trichlorosilanes;The solvent refers to methanol or ethyl alcohol.
7. the preparation method of the super-hydrophobic electret according to claim 6 with air-cleaning function, which is characterized in that Correspondence is as follows respectively for the low-surface energy substance and solvent:
Stearic acid:Ethyl alcohol;
Hexadecyl trimethoxy silane:Methanol;
1H, 1H, 2H, 2H- perfluoroalkyl triethoxysilane:Ethyl alcohol;
1H, 1H, 2H, 2H- perfluoroalkyl trichlorosilane:Ethyl alcohol.
8. the preparation method of the super-hydrophobic electret with air-cleaning function as described in any one of claim 1-7 is made The super-hydrophobic electret with air-cleaning function obtained, which is characterized in that it is 2-10 layers that it, which is superimposed number of plies,.
9. the preparation method of the super-hydrophobic electret with air-cleaning function as described in any one of claim 1-7 is made The super-hydrophobic electret with air-cleaning function obtained, which is characterized in that described that there is the super-hydrophobic of air-cleaning function to stay The filter efficiency for the particle that 0.02~10 μm of polar body pair is up to 99.999% or more.
CN201810192704.1A 2018-03-09 2018-03-09 A kind of preparation method of super-hydrophobic electret filter for air purification Pending CN108465297A (en)

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Application publication date: 20180831