CN109011922A - A kind of preparation method of the PM2.5 filtering net film based on TPU nanofiber - Google Patents
A kind of preparation method of the PM2.5 filtering net film based on TPU nanofiber Download PDFInfo
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- CN109011922A CN109011922A CN201811093464.6A CN201811093464A CN109011922A CN 109011922 A CN109011922 A CN 109011922A CN 201811093464 A CN201811093464 A CN 201811093464A CN 109011922 A CN109011922 A CN 109011922A
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- 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
- B01D46/0001—Making filtering elements
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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
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
-
- 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
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
-
- 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
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/546—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using nano- or microfibres
-
- 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
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/0604—Arrangement of the fibres in the filtering material
- B01D2239/0631—Electro-spun
-
- 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
- B01D2239/12—Special parameters characterising the filtering material
- B01D2239/1291—Other parameters
Abstract
The invention discloses a kind of preparation method of PM2.5 filtering net film based on TPU nanofiber, feature is the following steps are included: (1) obtains filtering net film frame up to 100-200nm using the method deposit Au metal thickness of magnetron sputtering on fiberglass gridding；(2) after being mixed in a certain ratio n,N-Dimethylformamide and acetone, a certain amount of TPU particle is stirred and is added, magnetic agitation after ultrasonic treatment stands and obtains TPU nanofiber precursor liquid afterwards for 24 hours；(3) high-voltage DC power supply firewire is connected to syringe needle outer wall, zero curve is connected to filtering net film frame as electrostatic spinning and collects substrate, TPU nanofiber precursor liquid is added in syringe, the PM2.5 filtering net film based on TPU nanofiber is obtained by electrostatic spinning mode, advantage is superelevation PM2.5 removal efficiency, low latitude gas filters pressure drag, high quality factor and long service life.
Description
Technical field
The invention belongs to field of air filtration more particularly to a kind of PM2.5 air filtration nethike embranes based on TPU nanofiber
Preparation method.
Background technique
With the continuous improvement of industrialized level, air pollution problems inherent is got worse.It is empty as main air pollutants
Gas suspension particulate pollutant is by people's extensive concern.As a kind of main airborne suspended particle pollutant, PM2.5 refers to
Air suspension fine grained pollutant of the grain character size less than 2.5 microns.The PM2.5 pollutant to suspend in air can directly lead to
Remarkable nose and bronchus enters human lung, to cause a variety of chronic diseases, such as asthma, chronic bronchitis, painstaking effort
Pipe disease etc..In order to decrease or even eliminate the influence of PM2.5 air pollutants, a variety of PM2.5 air filtration nethike embranes are applied to interior
The window filtering net film of air quality protection and the filter membrane mask of outdoor personal protection.PM2.5 air filtration nethike embrane is main
It is the inherent structure (fibre diameter, aperture, porosity, bulk density) by itself, physical property (dielectric properties) etc. is realized
Efficient removal to particulate in air matter.
Existing PM2.5 air filtration nethike embrane mainly includes two major classes: one is utilize smaller pore size filter composition
Filtering net film removes PM2.5 suspended particulate in air, is similar to purification water filtering system.It is outstanding in order to reach higher PM2.5
Floating particles filter efficiency, pore size filter is commonly designed smaller, and lesser pore size filter will greatly improve air filtration pressure
Difference, so as to cause sluggish in air circulation；Another kind is using in PM2.5 air filtration nethike embrane itself static electricity absorption air
PM2.5 suspended particulate, there are quality factor low, the long-time service performance decline etc. of current this PM2.5 air filtration nethike embrane
Technical problem.Wherein, the features such as nanofiber is because of its lower aperture, high porosity, ideal Electrostatic Absorption is in PM2.5
Unique advantage is shown in the design of air filtration nethike embrane.In recent years, a variety of nanofiber preparation methods continuously attempt to, and such as draw
Stretch method, template synthesis method, phase separation method, self-assembly method, method of electrostatic spinning etc..Wherein, method of electrostatic spinning with its equipment simple, work
Skill is controllable, spinning suiting range is wide, many-sided feature such as at low cost, becomes the prefered method for preparing nanofiber.Thermoplastic polyurethane
(TPU) be a kind of widely used high molecular material, compared to other macromolecule polymer materials, it have it is wear-resisting, it is certain thoroughly
The advantages that photosensitiveness, high stretch, high stability, high fire-retardance, difficult hydrolysis, good biocompatibility.But currently, both at home and abroad also
It does not disclose any about the correlation for preparing preparation method of the TPU nanofiber as PM2.5 filtering net film using electrostatic spinning
Content.
Summary of the invention
Technical problem to be solved by the invention is to provide one kind to have superelevation PM2.5 removal efficiency, low latitude gas filtration pressure
Resistance, the preparation method of high quality factor and the PM2.5 air filtration nethike embrane with long service life based on TPU nanofiber.
The technical scheme of the invention to solve the technical problem is: a kind of PM2.5 mistake based on TPU nanofiber
The preparation method of screen membrane, comprising the following steps:
(1) prepared by filtering net film frame: being reached on fiberglass gridding using the method deposit Au metal thickness of magnetron sputtering
100-200nm；Enhance substrate conduction, the homogeneity for the PM2.5 filtering net film thickness being finally made can be improved；
(2) preparation of TPU nanofiber precursor liquid: after n,N-Dimethylformamide and acetone are mixed in a certain ratio, stirring
And a certain amount of TPU particle is added, it is ultrasonically treated after 0.5-1.5min, magnetic agitation 6-12h is until solution becomes transparent clear
Clearly, after standing for 24 hours, TPU nanofiber precursor liquid is obtained；
(3) PM2.5 filtering net film is prepared by the way of electrostatic spinning: high-voltage DC power supply firewire is connected to the stainless steel of syringe
Syringe needle outer wall, zero curve are connected to filtering net film frame as electrostatic spinning and collect substrate, and syringe needle is protected at a distance from filtering net film frame
It holds in 10-15cm；Then, 1-1.5mL TPU nanofiber precursor liquid is added in syringe every time, opening high-voltage DC power supply makes
Voltage maintains 10-20kV, and control precursor liquid spouting velocity is 0.05-0.15mL/min, electrostatic spinning 10-60min, obtains base
In the PM2.5 filtering net film of TPU nanofiber.The TPU nanofiber that the present invention is formed using electrostatic spinning as material of main part,
Using glass fibre as filtering net film frame, the filtering net film preparation of high PM2.5 removal efficiency is realized.By to TPU nanofiber
The configuration regulation of precursor liquid component realizes that air filtration pressure drag is in reduced levels to higher PM2.5 removal efficiency simultaneously.For most
After good TPU nanofiber precursor liquid component configuration, by controlling the electrostatic spinning time, the TPU nanometer of certain light transmittance is obtained
Fiber filter nethike embrane realizes that its PM2.5 removal efficiency is in high level in a long time.
Preferably, fiberglass gridding linear diameter is 0.2-0.5mm in the step (1), specification is 18 mesh × 16 mesh,
Size is 8cm × 8cm.
Preferably, magnetron sputtering Au metal thickness is 150nm in the step (1).Electric conductivity is best under the thickness.
Preferably, n,N-Dimethylformamide and the purity of acetone are not less than 99% in the step (2).
Preferably, n,N-Dimethylformamide and the mixed volume ratio of acetone are 1:1 in the step (2).
Preferably, TPU particle adds in the following proportions in the step (2): every 5mL n,N-Dimethylformamide and
0.6-2.0g TPU particle is added in 5mL acetone mixture.
Preferably, n,N-Dimethylformamide and acetone should be mixed carefully in the step (2), needed before ultrasound with envelope
Membrana oralis seals beaker mouth, prevents acetone from volatilizing.
Preferably, ultrasound 0.5min, magnetic agitation 12h in the step (2).It is mixed slowly in magneton when magnetic agitation
To guarantee that TPU sufficiently dissolves.
Preferably, all process environment temperature are 0-25 DEG C in the step (2).
Preferably, electrostatic spinning ambient air humidity is 48-52% in the step (3), temperature is 0-25 DEG C.
Compared with the prior art, the advantages of the present invention are as follows: it is received the invention discloses a kind of using electrostatic spinning preparation TPU
Preparation method of the rice fiber as PM2.5 filtering net film, the high-performance TPU nanofiber PM2.5 filtering net film being prepared are
Pass through the regulation of nanofiber morphosis and packed structures, functional materials modification, the preparation of solution component and rear place
The modes such as reason realize, have a superelevation PM2.5 removal efficiency, and low latitude gas filters pressure drag, high quality factor and work long hours down
The features such as good filtering stability.Through preliminary test, the PM2.5 filtering net film PM2.5 removal efficiency based on TPU nanofiber
Up to 98.92%, air filtration pressure drag is only 10Pa, and quality factor reach 0.45Pa-1, good permeability high with filter efficiency,
The features such as quality factor are high, long service life, while also having certain translucency, draftability and meets many environmental requirements
Advantage.
Detailed description of the invention
Fig. 1 is that the present invention is the electrostatic spinning apparatus schematic diagram based on TPU Nanofiber filter nethike embrane；
Fig. 2 is the high resolution scanning electron microscope figure based on TPU Nanofiber filter nethike embrane；A: the preparation gained base of embodiment 1
In TPU Nanofiber filter nethike embrane；B: the preparation gained of embodiment 3 is based on TPU Nanofiber filter nethike embrane；C: prepared by embodiment 5
Gained is based on TPU Nanofiber filter nethike embrane；
Fig. 3 is the diameter distribution statistics figure based on TPU Nanofiber filter nethike embrane；A: the preparation gained of embodiment 1 is based on TPU nanometers
Fiber filter nethike embrane；B: the preparation gained of embodiment 3 is based on TPU Nanofiber filter nethike embrane；C: the preparation gained of embodiment 5 is based on
TPU Nanofiber filter nethike embrane；
Fig. 4 is the embodiment of the present invention 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5, all classes obtained in embodiment 6
The filter efficiency of type TPU filtering net film is with speed air flow change curve；
Fig. 5 is the embodiment of the present invention 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5, all classes obtained in embodiment 6
The gas pressure intensity difference of type TPU filtering net film is with speed air flow change curve；
Fig. 6 is the embodiment of the present invention 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5, all classes obtained in embodiment 6
The quality factor of type TPU filtering net film are with speed air flow change curve；
Fig. 7 is that light transmittance obtained is 60%(a in the embodiment of the present invention 7), 40%(b), 25%(c), 10%(d) TPU nanofiber
PM2.5 filtering net film photo；
Fig. 8 is that light transmittance obtained is 60% TPU nanofiber PM2.5 filtering net film in airless feelings in the embodiment of the present invention 7
PM2.5 and PM2.5-10 filter efficiency changes with time under condition；
Fig. 9 is that light transmittance obtained is 60% TPU nanofiber PM2.5 filtering net film in 200mL/min in the embodiment of the present invention 7
PM2.5 and PM2.5-10 filter efficiency changes with time under airflow condition；
Figure 10 is that light transmittance obtained is 60% TPU nanofiber PM2.5 filtering net film filtering front and back in the embodiment of the present invention 7
SEM picture, a are SEM picture before PM2.5 filtering net film filters, and b is SEM picture after the filtering of PM2.5 filtering net film.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
One, specific embodiment
Embodiment 1
Preparation method based on TPU nanofiber PM2.5 filtering net film in the present embodiment includes the following steps,
(1) filtering net film frame is prepared: using the method deposit Au metal of magnetron sputtering on 8cm × 8cm fiberglass gridding
With a thickness of 100-200nm, enhance substrate conduction；
(2) it prepares TPU nanofiber precursor liquid: 5mL n,N-Dimethylformamide uniformly being mixed with 5mL acetone, and is added
0.75g TPU particle is ultrasonically treated after 0.5min, and magnetic agitation 12h makes solution become transparent clarification, after standing one day,
Just obtain TPU nanofiber precursor liquid；Above procedure carries out at 25 DEG C of room temperature；
(3) TPU Nanofiber filter nethike embrane is prepared by the way of electrostatic spinning: preparing the stainless steel that 5mL syringe connects 22G model
High-voltage DC power supply firewire is connected to syringe needle outer wall by syringe needle, and zero curve is connected to filtering net film frame as electrostatic spinning and collects substrate,
Syringe needle is maintained at 12cm at a distance from filtering net film frame；Then, 1mL TPU nanofiber forerunner is added in syringe every time
Liquid, opening high-voltage DC power supply makes voltage maintain 15kV, and control precursor liquid spouting velocity is 0.1mL/min, electrostatic spinning
30min obtains the PM2.5 filtering net film of TPU nanofiber.
Embodiment 2
With above-described embodiment 1, difference is that 0.96gTPU particle is added in step (2).
Embodiment 3
With above-described embodiment 1, difference is that 1.18gTPU particle is added in step (2).
Embodiment 4
With above-described embodiment 1, difference is that 1.41gTPU particle is added in step (2).
Embodiment 5
With above-described embodiment 1, difference is that 1.65gTPU particle is added in step (2).
Embodiment 6
With above-described embodiment 1, difference is that 1.9gTPU particle is added in step (2).
Embodiment 7
With above-described embodiment 5, difference is in step (3) that electrostatic spinning 30min is changed to electrostatic spinning 10min respectively,
20min, 30min, 40min.
In addition to the implementation, Au metal thickness can also be any value in 100-200nm in step (1)；Step (2)
Middle ultrasonic treatment can be any value in 0.5-1.5min；The magnetic agitation time can be any value in 6-12h；Step
(3) syringe needle may remain in any value in 10-15cm at a distance from filtering net film frame in；TPU Nanowire is added in syringe
Tieing up precursor liquid volume is any value in 1-1.5mL；High-voltage DC power supply makes voltage maintain any value in 10-20kV；Control
Precursor liquid spouting velocity processed is any value in 0.05-0.15mL/min.
TPU nanofiber PM2.5 filtering net film obtained is PM2.5 air filter core in the embodiment of the present invention
Part, for convenient for detection, the size of the PM2.5 filtering net film obtained based on TPU nanofiber is in the above embodiment of the present invention
8cm × 8cm(long × wide).
Two, comparative analysis is tested
The present invention has carried out a series of performance tests to TPU nanofiber PM2.5 filtering net film obtained in above-described embodiment 1-7
And characterization, test method and result are as follows: using high resolution scanning electron microscope to the structural characterization that TPU nanofiber carries out
(Hitachi S-400).
Fig. 1 is that the present invention is based on the electrostatic spinning apparatus schematic diagrames of TPU Nanofiber filter nethike embrane.
From Fig. 2 embodiment of the present invention 1, embodiment 3, the high-resolution based on TPU Nanofiber filter nethike embrane is swept in embodiment 5
It retouches in electron microscope picture (a)-(c) and finds out, rise to 16%, TPU bead Nanowire from 8% with TPU mass fraction is added
Dimension metric density is reduced, and nanofiber quantity and diameter dramatically increase.
From Fig. 3 embodiment of the present invention 1, embodiment 3, the diameter distribution based on TPU Nanofiber filter nethike embrane in embodiment 5
The TPU nanofiber of mass fraction 8% is added it is found that according to image processing software ImageJ statistical result in statistical chart (a)-(c)
Average diameter is 0.14 ± 0.06 μm, and the TPU nanofiber average diameter that mass fraction 12% is added is 0.40 ± 0.15 μm, is added
The TPU nanofiber average diameter for entering mass fraction 16% is 0.81 ± 0.17 μm.
Fig. 4, Fig. 5 should be the embodiment of the present invention 1 with Fig. 6 phase, embodiment 2, embodiment 3, embodiment 4, embodiment 5, implement
The filter efficiency of all types TPU filtering net film obtained, gas pressure intensity be poor in example 6, quality factor become with speed air flow
Change curve.
From fig. 4, it can be seen that being based on TPU Nanofiber filter nethike embrane highest PM2.5 in the case where the flowing of no air
Removal efficiency has reached 99.64%, and with the rising of air velocity, the PM2.5 removal efficiency of all filtering net films is slightly reduced.
Under identical air velocity, be added TPU mass fraction from 8% increase to 10% when, removal efficiency improve, this is because diameter compared with
Big nanofiber is easier to stop the diffusion of PM particle.On the other hand, increase to addition TPU mass fraction from 10%
18%, the disappearance of bead nanofiber and the increase of TPU nanofiber spacing, so that removal efficiency is substantially reduced.
From fig. 5, it can be seen that gas pressure intensity difference ascendant trend directly proportional to gas flow rate, this is kissed very much with darcy theory
It closes.Meanwhile under identical gas flow rate, increase to 10% from 8% with TPU mass fraction is added, 10% increases to 16%
And 16% increase to 18%, gas pressure intensity difference, which experienced, first to be increased, and is then continued to decline, the process being finally increased slightly.Product
Prime factor is used to evaluate the filter capacity of filtering net film, as follows with the relationship of filter efficiency and gas pressure difference: quality factor
=-ln (1- filter efficiency)/gas pressure intensity is poor.
Fig. 6 compares the quality factor of all types TPU filtering net film with the variation of speed air flow.As addition TPU
When mass fraction is 16%, the TPU filtering net film quality factor being prepared under the air velocity of 200mL/min reach
0.45Pa-1, PM2.5 removal efficiency are 98.92%, and gas pressure intensity difference is only 10Pa.
Fig. 7 is that light transmittance obtained is 60%(a in the embodiment of the present invention 7), 40%(b), 25%(c), 10%(d) TPU nanometers
Fiber PM2.5 filtering net film photo.It is respectively 10min, 20min, 30min, 40min by changing the electrostatic spinning time, corresponds to
Light transmittance 60% is made, 40%, 25%, 10% TPU nanofiber PM2.5 filtering net film realizes light transmittance and tentatively regulates and controls.
It is 60% TPU nanofiber PM2.5 filter screen that Fig. 8 with Fig. 9 phase, which should be light transmittance obtained in the embodiment of the present invention 7,
Film PM2.5 and PM2.5-10 filter efficiency under airless, 200mL/min airflow condition changes with time.As shown in Figure 8,
In airless, filter screen obtained PM2.5 removal efficiency in 12h is maintained at > 96%, PM2.5-10 removal efficiency guarantor
It holds > 97%.Meanwhile PM2.5 removal efficiency is slightly less than PM2.5-10 removal efficiency always, embodies the nature of PM2.5-10
Diffusivity is weaker than PM2.5.As shown in Figure 9, under 200mL/min airflow condition, PM2.5 and PM2.5-10 removal efficiency is equal
> 92% is kept in 12h.
Figure 10 is before light transmittance obtained is the filtering of 60% TPU nanofiber PM2.5 filtering net film in the embodiment of the present invention 7
SEM picture afterwards.As seen from the figure, prepared by the present invention to be filtered to remove well based on TPU nanofiber PM2.5 filtering net film
PM2.5。
Under 200mL/min air velocities, TPU nanofiber made from the embodiment of the present invention 1,2,3,4,5,6
PM2.5 filtering net film PM2.5 removal efficiency is respectively 97.37%, 98.68%, 99.12%, 95.41%, 98.92%, 95.15%.
Under 200mL/min air velocities, TPU nanofiber made from the embodiment of the present invention 1,2,3,4,5,6
PM2.5 filtering net film gas pressure intensity difference is respectively 50Pa, 70Pa, 50Pa, 30Pa, 10Pa, 10Pa.
Under 200mL/min air velocities, TPU nanofiber made from the embodiment of the present invention 1,2,3,4,5,6
PM2.5 filtering net film quality factor are respectively 0.073Pa-1、0.062 Pa-1、0.095 Pa-1、0.1 Pa-1、0.45 Pa-1、
0.3 Pa-1。
Above description is not limitation of the present invention, and the present invention is also not limited to the example above.The art it is common
Within the essential scope of the present invention, the variations, modifications, additions or substitutions made also should belong to protection of the invention to technical staff
Range.
Claims (10)
1. a kind of preparation method of the PM2.5 filtering net film based on TPU nanofiber, it is characterised in that the following steps are included:
(1) prepared by filtering net film frame: being reached on fiberglass gridding using the method deposit Au metal thickness of magnetron sputtering
100-200nm；
(2) preparation of TPU nanofiber precursor liquid: after n,N-Dimethylformamide and acetone are mixed in a certain ratio, stirring
And a certain amount of TPU particle is added, it is ultrasonically treated after 0.5-1.5min, magnetic agitation 6-12h is until solution becomes transparent clear
Clearly, after standing for 24 hours, TPU nanofiber precursor liquid is obtained；
(3) PM2.5 filtering net film is prepared by the way of electrostatic spinning: high-voltage DC power supply firewire is connected to the stainless steel of syringe
Syringe needle outer wall, zero curve are connected to filtering net film frame as electrostatic spinning and collect substrate, and syringe needle is protected at a distance from filtering net film frame
It holds in 10-15cm；Then, 1-1.5mL TPU nanofiber precursor liquid is added in syringe, opening high-voltage DC power supply makes voltage
10-20kV is maintained, control precursor liquid spouting velocity is 0.05-0.15mL/min, and electrostatic spinning 10-60min is based on
The PM2.5 filtering net film of TPU nanofiber.
2. a kind of preparation method of PM2.5 filtering net film based on TPU nanofiber according to claim 1, feature
Be: in the step (1) fiberglass gridding linear diameter be 0.2-0.5mm, specification be 18 mesh × 16 mesh, size be 8cm ×
8cm。
3. a kind of preparation method of PM2.5 filtering net film based on TPU nanofiber according to claim 1, feature
Be: magnetron sputtering Au metal thickness is 150nm in the step (1).
4. a kind of preparation method of PM2.5 filtering net film based on TPU nanofiber according to claim 1, feature
Be: the purity of N,N-dimethylformamide and acetone is not less than 99% in the step (2).
5. a kind of preparation method of PM2.5 filtering net film based on TPU nanofiber according to claim 1, feature
Be: the mixed volume ratio of N,N-dimethylformamide and acetone is 1:1 in the step (2).
6. a kind of preparation method of PM2.5 filtering net film based on TPU nanofiber according to claim 5, feature
Be: TPU particle adds in the following proportions in the step (2): every 5mL n,N-Dimethylformamide and 5mL acetone mixture
Middle addition 0.6-2.0g TPU particle.
7. a kind of preparation method of PM2.5 filtering net film based on TPU nanofiber according to claim 1, feature
Be: n,N-Dimethylformamide and acetone should be mixed carefully in the step (2), and ParafilmTM beaker is used before ultrasound
Mouthful.
8. a kind of preparation method of PM2.5 filtering net film based on TPU nanofiber according to claim 1, feature
It is: ultrasound 0.5min, magnetic agitation 12h in the step (2).
9. a kind of preparation method of PM2.5 filtering net film based on TPU nanofiber according to claim 1, feature
Be: all process environment temperature are 0-25 DEG C in the step (2).
10. a kind of preparation method of PM2.5 filtering net film based on TPU nanofiber according to claim 1, feature
Be: electrostatic spinning ambient air humidity is 48-52% in the step (3), and temperature is 0-25 DEG C.
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Cited By (3)
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| CN110090565A (en) * | 2019-04-12 | 2019-08-06 | 宁波大学 | A kind of preparation method and applications of the PVDF nano-fiber composite film of precious metal doping |
| WO2020244611A1 (en) * | 2019-06-05 | 2020-12-10 | 浙江佳海新材料有限公司 | Automobile air conditioner filter material having voc filtering function and process therefor |
| CN114653227A (en) * | 2022-04-11 | 2022-06-24 | 南方科技大学 | Preparation method of nanofiber composite membrane |
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