CN107051232A - One kind sterilization removes aldehyde air-filtering membrane - Google Patents
One kind sterilization removes aldehyde air-filtering membrane Download PDFInfo
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Abstract
Aldehyde air-filtering membrane is removed the invention discloses one kind sterilization, described air-filtering membrane is three layers of nano fibrous membrane composite construction, and upper strata is activated carbon nano fibrous membrane, and intermediate layer is pure TiO2Nano fibrous membrane, lower floor's nano Ag antibacterial fiber film, described pure TiO2Nano fibrous membrane is high polymer material/TiO made from method of electrostatic spinning2The pure TiO of the thermally treated gained of presoma composite nano-fiber membrane2Nano fibrous membrane, described activated carbon nano fibrous membrane is electrospun nanofiber activated carbon granule/high polymer material composite nano-fiber membrane, and described nano Ag antibacterial fiber film is electrospun nanofiber Argent grain/high polymer material composite nano-fiber membrane.The air filter film can not only play good filter effect, and good permeability to solid granular pollutant, additionally it is possible to which the formaldehyde in air, the harmful bacteria in filtering killing air are decomposed in purification, preferably ensure respiratory health.
Description
Technical field
The invention belongs to antipollution air filtration purification applications field, more particularly to a kind of sterilization removes aldehyde air-filtering membrane,
The air filter film can be used as mouth mask material for core.
Background technology
Air pollution is that pollutant concentration reaches detrimental extent in air, has exceeded environmental quality standards and destruction ecosystem
System and human normal life's condition, the phenomenon caused harm to people and thing.In addition to the atmosphere pollution caused by process of industrialization,
Fit up the room air pollution caused also to can not be ignored, there is more than 500 kinds of volatile materials, wherein carcinogenic substance in air indoors
Matter just has kind more than 20, Causative virus kind more than 200.Harm is larger mainly to be had：Formaldehyde, benzene, ammonia and trichloro ethylene etc., Interior Space
Gas pollution is mainly derived from finishing pollution, and its reason is contained hazardous substance in the building materials that building is selected, and severe overweight.
Harm of its major pollutants formaldehyde to human body has chronicity, latency, concealed feature, and long-term inhaled formaldehyde can trigger nose
The serious diseases such as pharynx cancer, larynx cancer.In face of so serious air pollution form, surely belong to wear in the maximally effective means of personal protection
Wear masks, occurred in that a variety of use air-filtering membranes on the market at present as the mouth mask of material for core, these products can
Play a part of solid granular pollutant in isolation air to a certain extent.But, the material for core of mouth mask on the market
Mainly it is emphasised that filtering function, filter effect is also uneven, even and if this kind of material for core blocks the solid in air
Particulate matter, but the pollutant such as PARA FORMALDEHYDE PRILLS(91,95) still can not remove effectively, while the particle and bacterium that are filtered are liable to stick on mouth mask
Press close to the position of mouth and nose, cause the growth of bacterium, form secondary pollution, easily trigger breathing problem, be detrimental to health.
The content of the invention
It is an object of the invention to overcome prior art not enough there is provided one kind sterilization except aldehyde air-filtering membrane, the air filter
Film can not only play good filter effect, and good permeability as mouth mask material for core to solid granular pollutant,
The harmful bacteria in the formaldehyde decomposed in air, filtering killing air can also be purified, respiratory health is preferably ensured.
To achieve these goals, the technical scheme that the present invention is provided is as follows：
One kind sterilization removes aldehyde air-filtering membrane, and described air-filtering membrane is three layers of nano fibrous membrane composite construction, upper strata
For activated carbon nano fibrous membrane, intermediate layer is pure TiO2Nano fibrous membrane, lower floor's nano Ag antibacterial fiber film, described pure TiO2
Nano fibrous membrane is high polymer material/TiO made from method of electrostatic spinning2The thermally treated gained of presoma composite nano-fiber membrane
Pure TiO2Nano fibrous membrane, described activated carbon nano fibrous membrane is received for electrospun nanofiber activated carbon granule/high polymer material is compound
Rice tunica fibrosa, the spinning precursor liquid containing active carbon nanoparticles particle is compound in pure TiO through the direct electrospinning of electrostatic spinning2Nanofiber
Activated carbon nano fibrous membrane is formed on the upper surface of film, described nano Ag antibacterial fiber film is electrospun nanofiber Argent grain/high score
Sub- Material cladding nano fibrous membrane, the spinning precursor liquid containing nano-Ag particles is compound in pure TiO through the direct electrospinning of electrostatic spinning2
Nano Ag antibacterial fiber film is formed on the lower surface of nano fibrous membrane.
Titanium dioxide is a kind of photochemical catalyst, under illumination condition, and titanium dioxide surface can excite generation electronics and sky
Cave, catalytic air pollutant (such as formaldehyde) reaction generation carbon dioxide and water, with high polymer material made from method of electrostatic spinning/
TiO2Presoma composite nano-fiber membrane is thermally treated to make titanium dioxide crystal while removing the high polymer material in fiber, can be with
Obtain by TiO2What nanofiber was constituted has bigger serface and the pure TiO of macroporosity2Nano fibrous membrane, compared to other
TiO2Photochemical catalyst, this material with abundant hole and bigger serface more fully can connect with the formaldehyde in air
Touch, improve the catalytic decomposition efficiency of formaldehyde, while the abundant nanoaperture that it has makes material have preferable gas permeability,
The solid particulate matter that can also be crossed in air filtering.But the mechanical property of the nano fibrous membrane of this titanium dioxide crystal composition
It is very poor, do not possess stretch bending performance, therefore, although this application electrostatic spinning and heat-treating methods prepare TiO2Nanowire
Tieing up film has higher catalytic performance, still can not be widely used, especially be needed in mouth mask filter core etc. with pliability
Air filtration membrane material in terms of application be limited by very large.The air-filtering membrane of the present invention is straight using method of electrostatic spinning
It is connected on pure TiO2The two sides electrospinning of nano fibrous membrane compound activated carbon nano fibrous membrane and Nano Silver with preferable mechanical property
Anti-bacterial fibre film, up and down two layers of tunica fibrosa pass through fibre structure and TiO2The long, rectangular bag formation composite construction of nanofiber, can be right
The TiO in intermediate layer2Nano fibrous membrane plays protection, fixation, and the mechanical property of composite is improved to a certain extent, is made
It can adapt to application demand, while the membranaceous nano-porous structure of fiber that upper and lower two layers of tunica fibrosa has can also improve multiple
The filter effect of condensation material, strengthens its filtration to micropollutants, while nano Ag antibacterial fiber film also has stronger
Antibacterial and bacteriostasis, with pure TiO2Nano fibrous membrane collective effect can play preferable antibacterial bacteriostatic effect, and effectively filtering is killed
The harmful bacteria gone out in air, plays the absorption of the activated carbon nano particle in more preferable protective action, activated carbon nano fibrous membrane
The loose structure line of effect and the air-filtering membrane coordinates can be with the performance of reinforcing material adsorption filtration solid grain contamination.
Taken into account by the compound air-filtering membrane for making the present invention of material with superior antibacterial, filtering (solid particle) and except aldehyde is made
With.
It is preferred that, pure TiO2High polymer material/TiO of nano fibrous membrane2Presoma composite nano-fiber membrane is the poly- second of electrospinning
Alkene pyrrolidone/TiO2Presoma composite nano-fiber membrane.
It is preferred that, described pure TiO2Nano fibrous membrane is made by following methods：
(1) 3.4g tetrabutyl titanates are added in 9ml absolute ethyl alcohols with 2g sulfosalicylic acids, and magnetic agitation mixing in 1 hour is equal
It is even to obtain solution A；3g polyvinylpyrrolidones are added in 7ml deionized waters, and magnetic agitation is well mixed to obtain solution B in 2 hours；Will
Solution A and solution B mixing magnetic agitation are well mixed 2 hours solution, produce spinning precursor liquid A；
(2) the spinning precursor liquid A obtained by step (1) is added in the liquid storage mechanism of electrostatic spinning apparatus, carries out electrostatic spinning
Tunica fibrosa is formed on collecting plate and produces polyvinylpyrrolidone/TiO2Presoma composite nano-fiber membrane, spinning voltage is
15kV, spinning distance is 10cm, and the spinning time is 40 minutes；
(3) sample of gained is placed in tube furnace in step (2), and under oxygen atmosphere, 500 are warming up to 10 DEG C/min
DEG C, after being incubated 2 hours, it is cooled to room temperature and takes out sample, produce pure TiO2Nano fibrous membrane.
It is preferred that, described activated carbon nano fibrous membrane is active carbon nanoparticles particle/polyvinylpyrrolidone composite Nano
Tunica fibrosa.
It is preferred that, described activated carbon nano fibrous membrane is made by following methods：
A) particle diameter is mixed after magnetic agitation 2h for 200nm active carbon nanoparticles particle with absolute ethyl alcohol, ultrasonic vibration
10min, again magnetic agitation 20min obtain nano-Ag particles in active carbon nanoparticles dispersion liquid, described active carbon nanoparticles dispersion liquid
Content be 10%；
B) the poly- second of polyacrylonitrile that mass fraction is 18wt% is made during polyvinylpyrrolidone is dissolved in deionized water
Alkene pyrrolidone solution, the active carbon nanoparticles dispersion liquid obtained by the polyvinylpyrrolidonesolution solution and step a) of gained is in mass ratio
1:1 is mixed evenly and produces spinning precursor liquid B；
C) as the pure TiO in intermediate layer2Nano fibrous membrane upper surface is laid in electrostatic spinning apparatus towards spinning nozzle
On collecting plate, by the spinning precursor liquid B obtained by step b) by method of electrostatic spinning directly in pure TiO2Nano fibrous membrane it is upper
Composite activated carbon nano fibrous membrane on surface, spinning voltage 20kV, spinning is apart from 15cm, and the spinning time is 30 minutes.
It is preferred that, described nano Ag antibacterial fiber film is nano-Ag particles/polyvinylpyrrolidine made from direct electrospinning
Ketone composite nano-fiber membrane.
It is preferred that, described nano Ag antibacterial fiber film is made by following methods：
1) particle diameter is mixed after magnetic agitation 2h for 50nm nano-Ag particles with absolute ethyl alcohol, ultrasonic vibration 10min, then
The content that secondary magnetic agitation 20min obtains nano-Ag particles in nano silver dispersion, described nano silver dispersion is 5%；
2) the poly- second of polyacrylonitrile that mass fraction is 18wt% is made during polyvinylpyrrolidone is dissolved in deionized water
Alkene pyrrolidone solution, the polyvinylpyrrolidonesolution solution of gained and step 1) obtained by nano silver dispersion in mass ratio 1:1
It is mixed evenly and produces spinning precursor liquid C；
3) as the pure TiO in intermediate layer2Nano fibrous membrane lower surface is laid in electrostatic spinning apparatus towards spinning nozzle
On collecting plate, by step 2) obtained by spinning precursor liquid C by method of electrostatic spinning directly in pure TiO2Under nano fibrous membrane
Composite nano silver anti-bacterial fibre film on surface, spinning voltage 15kV, spinning is apart from 10cm, and the spinning time is 20 minutes.
Water miscible polyvinylpyrrolidone is have chosen in preferred scheme as upper strata, the high score of the nano fibrous membrane of lower floor
Subbase matter, and the concentration of deionized water in spinning precursor liquid is deliberately increased when spinning solution is prepared, consolidated with slowing down fiber
The speed of change, so that directly in the pure TiO in intermediate layer2Nano fibrous membrane surface electrospinning is combined upper strata, the nano fibrous membrane of lower floor
When, fall within pure TiO2The electro spinning nano fiber on nano fibrous membrane surface is not fully cured, now, and this electro spinning nano fiber is not
Only with TiO2Nanofiber formation long, rectangular bag structure, can also during solidification with TiO2Nanofiber is adhered, and is produced more firm
Combination, simultaneously as upper and lower two layers of tunica fibrosa use polymer matrix of the same race, the compatibility of materials at two layers is good up and down,
Pure TiO is fallen within electro-spinning process2The not yet fully hardened nano Ag antibacterial fiber on nano fibrous membrane surface can pass through pure TiO2
The hole of nano fibrous membrane is combined with the fiber adhesion of the activated carbon nano fibrous membrane on upper strata, forms more firm after fiber solidifying
Solid composite construction so that upper and lower two have the nano fibrous membranes containing high polymer material of preferable mechanical property with it is middle
Pure TiO2Nano fibrous membrane is firmly combined, can TiO pure to intermediate layer2Nano fibrous membrane plays preferably protection, support, limit
The effect of position, effectively makes up pure TiO2The shortcoming of nano fibrous membrane poor mechanical property, improves the mechanical property of composite so that
The air-filtering membrane of the present invention has preferable pliability, can adapt to application demand.
, should with reference to filter efficiency, air penetrability and the filtration resistance of the air-filtering membrane of the GB 2626-2006 test present invention
Filter efficiency >=99%, the air penetrability >=20cm/s, filtration resistance of air-filtering membrane<110Pa.
Beneficial effects of the present invention are：Aldehyde air-filtering membrane is removed the invention provides one kind sterilization, the air filter film can be made
For mouth mask material for core, good filter effect, and good permeability can be not only played to solid granular pollutant, additionally it is possible to
The formaldehyde in air, the harmful bacteria in filtering killing air are decomposed in purification, preferably ensure respiratory health.Specifically：
(1) titanium dioxide is a kind of photochemical catalyst, under illumination condition, titanium dioxide surface can excite generation electronics and
Hole, catalytic air pollutant (such as formaldehyde) reaction generation carbon dioxide and water, with high polymer material made from method of electrostatic spinning/
TiO2Presoma composite nano-fiber membrane is thermally treated to make titanium dioxide crystal while removing the high polymer material in fiber, can be with
Obtain by TiO2What nanofiber was constituted has bigger serface and the pure TiO of macroporosity2Nano fibrous membrane, compared to other
TiO2Photochemical catalyst, this material with abundant hole and bigger serface more fully can connect with the formaldehyde in air
Touch, improve the catalytic decomposition efficiency of formaldehyde, while the abundant nanoaperture that it has makes material have preferable gas permeability,
The solid particulate matter that can also be crossed in air filtering.But the mechanical property of the nano fibrous membrane of this titanium dioxide crystal composition
It is very poor, do not possess stretch bending performance, therefore, although this application electrostatic spinning and heat-treating methods prepare TiO2Nanowire
Tieing up film has higher catalytic performance, still can not be widely used, especially be needed in mouth mask filter core etc. with pliability
Air filtration membrane material in terms of application be limited by very large.The air-filtering membrane of the present invention is straight using method of electrostatic spinning
It is connected on pure TiO2The two sides electrospinning of nano fibrous membrane compound activated carbon nano fibrous membrane and Nano Silver with preferable mechanical property
Anti-bacterial fibre film, up and down two layers of tunica fibrosa pass through fibre structure and TiO2The long, rectangular bag formation composite construction of nanofiber, can be right
The TiO in intermediate layer2Nano fibrous membrane plays protection, fixation, and the mechanical property of composite is improved to a certain extent, is made
It can adapt to application demand, while the membranaceous nano-porous structure of fiber that upper and lower two layers of tunica fibrosa has can also improve multiple
The filter effect of condensation material, strengthens its filtration to micropollutants, while nano Ag antibacterial fiber film also has stronger
Antibacterial and bacteriostasis, with pure TiO2Nano fibrous membrane collective effect can play preferable antibacterial bacteriostatic effect, and effectively filtering is killed
The harmful bacteria gone out in air, plays the absorption of the activated carbon nano particle in more preferable protective action, activated carbon nano fibrous membrane
The loose structure line of effect and the air-filtering membrane coordinates can be with the performance of reinforcing material adsorption filtration solid grain contamination.
Taken into account by the compound air-filtering membrane for making the present invention of material with superior antibacterial, filtering (solid particle) and except aldehyde is made
With.
(2) water miscible polyvinylpyrrolidone is have chosen in preferred scheme as upper strata, the nano fibrous membrane of lower floor
Polymer matrix, and the concentration of deionized water in spinning precursor liquid is deliberately increased when spinning solution is prepared, to slow down fibre
The speed of solidification is tieed up, so that directly in the pure TiO in intermediate layer2Nano fibrous membrane surface electrospinning is combined upper strata, the Nanowire of lower floor
When tieing up film, pure TiO is fallen within2The electro spinning nano fiber on nano fibrous membrane surface is not fully cured, now, and this electrospun nanofiber is fine
Dimension not only with TiO2Nanofiber formation long, rectangular bag structure, can also during solidification with TiO2Nanofiber is adhered, and is produced more
Firm combination, simultaneously as upper and lower two layers of tunica fibrosa uses polymer matrix of the same race, materials at two layers is compatible up and down
Property is good, and pure TiO is fallen within electro-spinning process2The not yet fully hardened nano Ag antibacterial fiber on nano fibrous membrane surface can pass through
Pure TiO2The hole of nano fibrous membrane is combined with the fiber adhesion of the activated carbon nano fibrous membrane on upper strata, is formed after fiber solidifying
More firm composite construction so that upper and lower two have preferable mechanical property the nano fibrous membrane containing high polymer material with
Middle pure TiO2Nano fibrous membrane is firmly combined, can TiO pure to intermediate layer2Nano fibrous membrane plays preferably protection, branch
Support, spacing effect, effectively make up pure TiO2The shortcoming of nano fibrous membrane poor mechanical property, improves the mechanical property of composite
Can so that air-filtering membrane of the invention has preferable pliability, can adapt to application demand.
Embodiment
According to following embodiments, the present invention may be better understood.However, as it will be easily appreciated by one skilled in the art that real
Apply specific material proportion, process conditions and its result described by example be merely to illustrate the present invention without should also without limitation on
The present invention described in detail in claims.
Embodiment 1
One kind sterilization is made except aldehyde air-filtering membrane by following methods：
(1) 3.4g tetrabutyl titanates are added in 9ml absolute ethyl alcohols with 2g sulfosalicylic acids, and magnetic agitation mixing in 1 hour is equal
It is even to obtain solution A；3g polyvinylpyrrolidones are added in 7ml deionized waters, and magnetic agitation is well mixed to obtain solution B in 2 hours；Will
Solution A and solution B mixing magnetic agitation are well mixed 2 hours solution, produce spinning precursor liquid A；
(2) the spinning precursor liquid A obtained by step (1) is added in the liquid storage mechanism of electrostatic spinning apparatus, carries out electrostatic spinning
Tunica fibrosa is formed on collecting plate and produces polyvinylpyrrolidone/TiO2Presoma composite nano-fiber membrane, spinning voltage is
15kV, spinning distance is 10cm, and the spinning time is 40 minutes；
(3) sample of gained is placed in tube furnace in step (2), and under oxygen atmosphere, 500 are warming up to 10 DEG C/min
DEG C, after being incubated 2 hours, it is cooled to room temperature and takes out sample, produce pure TiO2Nano fibrous membrane；
(4) particle diameter is mixed after magnetic agitation 2h for 200nm active carbon nanoparticles particle with absolute ethyl alcohol, ultrasonic vibration
10min, again magnetic agitation 20min obtain nano-Ag particles in active carbon nanoparticles dispersion liquid, described active carbon nanoparticles dispersion liquid
Content be 10%；
(5) the poly- second of polyacrylonitrile that mass fraction is 18wt% is made during polyvinylpyrrolidone is dissolved in deionized water
Alkene pyrrolidone solution, polyvinylpyrrolidonesolution solution and the active carbon nanoparticles dispersion liquid obtained by step (4) of gained press quality
Than 1:1 is mixed evenly and produces spinning precursor liquid B；
(6) the pure TiO obtained by step (3)2Nano fibrous membrane upper surface is laid in electrostatic spinning apparatus towards spinning nozzle
Collecting plate on, by the spinning precursor liquid B obtained by step (5) by method of electrostatic spinning directly in pure TiO2Nano fibrous membrane
Composite activated carbon nano fibrous membrane on upper surface, is made the composite cellulosic membrane of two-layer structure, spinning voltage 20kV, spinning distance
15cm, the spinning time is 30 minutes；
(7) particle diameter is mixed after magnetic agitation 2h for 50nm nano-Ag particles with absolute ethyl alcohol, ultrasonic vibration 10min, then
The content that secondary magnetic agitation 20min obtains nano-Ag particles in nano silver dispersion, described nano silver dispersion is 5%；
(8) the poly- second of polyacrylonitrile that mass fraction is 18wt% is made during polyvinylpyrrolidone is dissolved in deionized water
Alkene pyrrolidone solution, polyvinylpyrrolidonesolution solution and the nano silver dispersion in mass ratio 1 obtained by step (7) of gained:1
It is mixed evenly and produces spinning precursor liquid C；
(9) the pure TiO of the composite cellulosic membrane of the two-layer structure obtained by step (6)2The surface of nano fibrous membrane is towards spinning
Shower nozzle is laid on the collecting plate of electrostatic spinning apparatus, and the spinning precursor liquid C obtained by step (8) is straight by method of electrostatic spinning
It is connected on pure TiO2Composite nano silver anti-bacterial fibre film on the surface of nano fibrous membrane, produces three-decker composite cellulosic membrane, spinning
Voltage 15kV, spinning is apart from 10cm, and the spinning time is 20 minutes；
(10) the three-decker composite cellulosic membrane obtained by step (9) is cut according to required air-filtering membrane size
Produce sterilization and remove aldehyde air-filtering membrane.
The air-filtering membrane as made from above method is three layers of nano fibrous membrane composite construction, and upper strata is activated carbon Nanowire
Film is tieed up, intermediate layer is pure TiO2Nano fibrous membrane, lower floor's nano Ag antibacterial fiber film.This hair is tested with reference to GB 2626-2006
Filter efficiency, air penetrability and the filtration resistance of bright air-filtering membrane, filter efficiency >=99%, the air penetrability of the air-filtering membrane
>=20cm/s, filtration resistance<110Pa.
Reference examples 1
The pure TiO of individual layer is prepared with reference to the method for step (1)~(3)2Nano fibrous membrane, and surveyed with reference to GB 2626-2006
Try the pure TiO of embodiment2Filter efficiency, air penetrability and the filtration resistance of nano fibrous membrane, filter efficiency≤81%, air penetrability >=
20cm/s, filtration resistance<110Pa.
Reference examples 2
The activated carbon nano fibrous membrane of individual layer is prepared (directly in collection in step (6) with reference to the method for step (4)~(6)
Nano fibrous membrane is collected on pole plate, then tunica fibrosa is removed from collecting plate and tested), and with reference to GB 2626-2006
Test filter efficiency, air penetrability and the filtration resistance of activated carbon nano fibrous membrane, filter efficiency≤80%, air penetrability >=20cm/
S, filtration resistance<110Pa.
Reference examples 3
The nano Ag antibacterial fiber film of individual layer is prepared with reference to the method for step (7)~(9), and is surveyed with reference to GB 2626-2006
Try filter efficiency, air penetrability and the filtration resistance of nano Ag antibacterial fiber film, filter efficiency≤80% of the filter disc, air penetrability >=
20cm/s, filtration resistance<110Pa.
It can be seen from the above results the present invention air-filtering membrane to the particulate matter in air with regard to preferable filterability
Can, and gas permeability is preferably, can play preferable air purification effect.
The bacteriostatic test of embodiment 2：
1st, experimental strain：Staphylococcus aureus (ATCC6538)
2nd, bacterium culture medium：Nutrient agar and nutrient broth medium.
3rd, bacteriostatic experiment point 1 experimental group and 4 control groups, experimental group uses the air-filtering membrane of embodiment 1, control group
1 is double-round board qualitative filter paper (blank control), and control group 2 is the pure TiO of reference examples 12Nano fibrous membrane, control group 3 is control
The activated carbon nano fibrous membrane of example 2, control group 4 is the nano Ag antibacterial fiber film of reference examples 3.
4th, specific experiment step：
(1) prepared by the sensitive piece of medicine：Diameter 6mm circle is made in the sample of 1 experimental group and 4 control groups of card punch respectively
Piece is put into the dry penicillin empty bottle of cleaning, and every kind of 5 sample disks of sample preparation, bottleneck is wrapped up with individual layer brown paper, and 121
DEG C autoclaving 30min, then through 100 DEG C of drying, it is closed to save backup；
(2) bacterium solution is prepared：Staphylococcus aureus strain is placed in 10ml nutrient broth mediums, 37 DEG C of culture 18h；
Take nutrient solution 1ml to add 9ml 0.9% aseptic sodium chloride solution respectively, dilution method is incremented by using 10 times, two kinds of bacterium solutions are distinguished
105~106cfu/ml is diluted to, it is standby；
(3) the obtained experiment bacterium solution of above-mentioned steps (2) is uniformly inoculated on mannitol sodium chloride agar plate, at room temperature
5min is stood, the sensitive piece of obtained 25 tablets of medicines in step (1) is laid on the agar plate for being inoculated with staphylococcus aureus,
Flat board is inverted into incubator after 37 DEG C of culture 24h, the antibacterial circle diameter (mm) of each susceptibility piece is measured, calculates the suppression of each group
Bacterium loop diameter average value, above operation is sterile working.
5th, experimental observation is measured：
Observation：Represented without inhibition zone with "-"；
Antibacterial circle diameter ＜ 10mm are slight antibacterial, are represented with "+"；
10~14mm of antibacterial circle diameter is that moderate is antibacterial, is represented with " ++ "；
Antibacterial circle diameter ＞ 14mm are highly antibacterial, are represented with " +++ "；
| Blank control | Comparative example 1 | Comparative example 2 | Comparative example 3 | Embodiment 1 | |
| Staphylococcus aureus | - | + | - | ++ | +++ |
By the above results it can be seen that the air-filtering membrane of embodiment 1 has good bactericidal and bacteriostatic effect, it can play
The effect of harmful bacteria in air is killed in purification.
Illustrative embodiments listed above are only not to technical scheme described in the invention for understanding that the present invention is used
Restriction, about the those of ordinary skill in field, on the basis of technical scheme described in claim, a variety of changes can also be made
Change or deform, all equivalent changes or deformation should all be covered within the claims of the present invention.The present invention is not
Part is described in detail, is the known technology of those skilled in the art of the present technique.
Claims (8)
1. one kind sterilization removes aldehyde air-filtering membrane, it is characterised in that described air-filtering membrane is that three layers of nano fibrous membrane are combined
Structure, upper strata is activated carbon nano fibrous membrane, and intermediate layer is pure TiO2Nano fibrous membrane, lower floor's nano Ag antibacterial fiber film, institute
The pure TiO stated2Nano fibrous membrane is high polymer material/TiO made from method of electrostatic spinning2Presoma composite nano-fiber membrane is through warm
Pure TiO obtained by processing2Nano fibrous membrane, described activated carbon nano fibrous membrane is electrospun nanofiber activated carbon granule/macromolecule
Material cladding nano fibrous membrane, the spinning precursor liquid containing active carbon nanoparticles particle is compound in pure through the direct electrospinning of electrostatic spinning
TiO2Activated carbon nano fibrous membrane is formed on the upper surface of nano fibrous membrane, described nano Ag antibacterial fiber film is electrospun nanofiber
Argent grain/high polymer material composite nano-fiber membrane, the spinning precursor liquid containing nano-Ag particles is through the direct electrospinning of electrostatic spinning
It is compound in pure TiO2Nano Ag antibacterial fiber film is formed on the lower surface of nano fibrous membrane.
2. a kind of sterilization as claimed in claim 1 removes aldehyde air-filtering membrane, it is characterised in that pure TiO2The height of nano fibrous membrane
Molecular material/TiO2Presoma composite nano-fiber membrane is electrospinning polyvinylpyrrolidone/TiO2Presoma composite nano fiber
Film.
3. a kind of sterilization as claimed in claim 2 removes aldehyde air-filtering membrane, it is characterised in that described pure TiO2Nanofiber
Film is made by following methods：
(1) 3.4g tetrabutyl titanates are added in 9ml absolute ethyl alcohols with 2g sulfosalicylic acids, and magnetic agitation is well mixed for 1 hour
Solution A；3g polyvinylpyrrolidones are added in 7ml deionized waters, and magnetic agitation is well mixed to obtain solution B in 2 hours；By solution A
It is well mixed 2 hours solution with solution B mixing magnetic agitation, produces spinning precursor liquid A；
(2) the spinning precursor liquid A obtained by step (1) is added in the liquid storage mechanism of electrostatic spinning apparatus, is carried out electrostatic spinning and is being received
Tunica fibrosa, which is formed, on collection pole plate produces polyvinylpyrrolidone/TiO2Presoma composite nano-fiber membrane, spinning voltage is 15kV,
Spinning distance is 10cm, and the spinning time is 40 minutes；
(3) sample of gained is placed in tube furnace in step (2), under oxygen atmosphere, and 500 DEG C, guarantor are warming up to 10 DEG C/min
Temperature is cooled to room temperature and takes out sample, produce pure TiO after 2 hours2Nano fibrous membrane.
4. a kind of sterilization as claimed in claim 1 removes aldehyde air-filtering membrane, it is characterised in that described active carbon nanofibers
Film is active carbon nanoparticles particle/polyvinylpyrrolidone composite nano-fiber membrane.
5. a kind of sterilization as claimed in claim 4 removes aldehyde air-filtering membrane, it is characterised in that described active carbon nanofibers
Film is made by following methods：
A) particle diameter is mixed after magnetic agitation 2h for 200nm active carbon nanoparticles particle with absolute ethyl alcohol, ultrasonic vibration 10min, then
The content that secondary magnetic agitation 20min obtains nano-Ag particles in active carbon nanoparticles dispersion liquid, described active carbon nanoparticles dispersion liquid is
10%；
B) the polyacrylonitrile polyethylene pyrrole that mass fraction is 18wt% is made during polyvinylpyrrolidone is dissolved in deionized water
Pyrrolidone solution, polyvinylpyrrolidonesolution solution and the active carbon nanoparticles dispersion liquid in mass ratio 1 obtained by step a) of gained:1
It is mixed evenly and produces spinning precursor liquid B；
C) as the pure TiO in intermediate layer2Nano fibrous membrane upper surface is laid in the collector of electrostatic spinning apparatus towards spinning nozzle
On plate, by the spinning precursor liquid B obtained by step b) by method of electrostatic spinning directly in pure TiO2On the upper surface of nano fibrous membrane
Composite activated carbon nano fibrous membrane, spinning voltage 20kV, spinning is apart from 15cm, and the spinning time is 30 minutes.
6. a kind of sterilization as claimed in claim 1 removes aldehyde air-filtering membrane, it is characterised in that described nano Ag antibacterial fiber
Film is nano-Ag particles/polyvinylpyrrolidone composite nano-fiber membrane made from direct electrospinning.
7. a kind of sterilization as claimed in claim 6 removes aldehyde air-filtering membrane, it is characterised in that described nano Ag antibacterial fiber
Film is made by following methods：
1) particle diameter is mixed after magnetic agitation 2h for 50nm nano-Ag particles with absolute ethyl alcohol, ultrasonic vibration 10min, again magnetic force
The content that stirring 20min obtains nano-Ag particles in nano silver dispersion, described nano silver dispersion is 5%；
2) the polyacrylonitrile polyethylene pyrrole that mass fraction is 18wt% is made during polyvinylpyrrolidone is dissolved in deionized water
Pyrrolidone solution, the polyvinylpyrrolidonesolution solution of gained and step 1) obtained by nano silver dispersion in mass ratio 1:1 mixing
Stir and produce spinning precursor liquid C；
3) as the pure TiO in intermediate layer2Nano fibrous membrane lower surface is laid in the collector of electrostatic spinning apparatus towards spinning nozzle
On plate, by step 2) obtained by spinning precursor liquid C by method of electrostatic spinning directly in pure TiO2On the lower surface of nano fibrous membrane
Composite nano silver anti-bacterial fibre film, spinning voltage 15kV, spinning is apart from 10cm, and the spinning time is 20 minutes.
8. a kind of sterilization as claimed in claim 1 removes aldehyde air-filtering membrane, it is characterised in that the mistake of described air-filtering membrane
Filter efficiency >=99%, air penetrability >=20cm/s, filtration resistance<110Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710384112.5A CN107051232B (en) | 2017-05-26 | 2017-05-26 | Sterilization and aldehyde removal air filtering membrane |
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| CN108589054A (en) * | 2018-05-08 | 2018-09-28 | 东华大学 | A kind of preparation method of polyacrylonitrile/nanometer silver antimicrobial filter composite material |
| CN110328920A (en) * | 2019-06-21 | 2019-10-15 | 陈秀梅 | A kind of environment-friendly composite material and preparation method thereof for anti-toxic gas |
| CN112244384A (en) * | 2020-10-29 | 2021-01-22 | 明光市铭垚凹凸棒产业科技有限公司 | Multifunctional reusable mask for efficient filtration, adsorption and sterilization and preparation method thereof |
| CN114351357A (en) * | 2022-01-12 | 2022-04-15 | 大连民族大学 | Flexible bactericidal nanofiber membrane and preparation method and application thereof |
| WO2023060027A1 (en) * | 2021-10-07 | 2023-04-13 | Matregenix, Inc. | Electrospun nanofibrous polymer membrane for use in air filtration applications |
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| CN114351357A (en) * | 2022-01-12 | 2022-04-15 | 大连民族大学 | Flexible bactericidal nanofiber membrane and preparation method and application thereof |
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