CN105821493A - Method for preparing composite nanofiber, composite nanofiber prepared by method, filter layer body and mask with filter layer body - Google Patents
Method for preparing composite nanofiber, composite nanofiber prepared by method, filter layer body and mask with filter layer body Download PDFInfo
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- CN105821493A CN105821493A CN201510730762.1A CN201510730762A CN105821493A CN 105821493 A CN105821493 A CN 105821493A CN 201510730762 A CN201510730762 A CN 201510730762A CN 105821493 A CN105821493 A CN 105821493A
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- composite nanofiber
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- 239000002121 nanofiber Substances 0.000 title claims abstract description 28
- 239000002131 composite material Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title abstract description 10
- 238000001914 filtration Methods 0.000 claims abstract description 36
- 238000010041 electrostatic spinning Methods 0.000 claims abstract description 20
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000002360 preparation method Methods 0.000 claims abstract description 15
- 239000002904 solvent Substances 0.000 claims abstract description 12
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims abstract description 10
- 239000004926 polymethyl methacrylate Substances 0.000 claims abstract description 10
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229920001661 Chitosan Polymers 0.000 claims abstract description 9
- 239000003463 adsorbent Substances 0.000 claims abstract description 9
- 235000019253 formic acid Nutrition 0.000 claims abstract description 9
- -1 Methyl flamprop Chemical compound 0.000 claims description 8
- 229920000858 Cyclodextrin Polymers 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- HFHDHCJBZVLPGP-UHFFFAOYSA-N schardinger α-dextrin Chemical group O1C(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(O)C2O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC2C(O)C(O)C1OC2CO HFHDHCJBZVLPGP-UHFFFAOYSA-N 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000001523 electrospinning Methods 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 15
- 238000012360 testing method Methods 0.000 description 13
- 239000000428 dust Substances 0.000 description 11
- 239000000843 powder Substances 0.000 description 11
- 238000009987 spinning Methods 0.000 description 10
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- 241000894006 Bacteria Species 0.000 description 5
- 239000004744 fabric Substances 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 4
- CUJVBAPGYBSBHJ-YWBSARSQSA-N 2-[[(1R,3R,5R,6S,8R,10R,11S,13R,15R,16S,18R,20R,21R,23R,25R,26R,28R,30R,31R,33R,35R,36R,37R,38R,39R,40R,41R,42R,43R,44R,45R,46R,47R,48R,49R)-36,38,40,42-tetrakis(carboxymethoxy)-10,15-bis(carboxymethoxymethyl)-37,39,41,43,44,45,46,47,48,49-decahydroxy-20,25,30,35-tetrakis(hydroxymethyl)-2,4,7,9,12,14,17,19,22,24,27,29,32,34-tetradecaoxaoctacyclo[31.2.2.23,6.28,11.213,16.218,21.223,26.228,31]nonatetracontan-5-yl]methoxy]acetic acid Chemical group OC[C@H]1O[C@@H]2O[C@H]3[C@H](O)[C@@H](O)[C@H](O[C@@H]3COCC(O)=O)O[C@H]3[C@H](O)[C@@H](O)[C@H](O[C@@H]3COCC(O)=O)O[C@H]3[C@H](O)[C@@H](O)[C@H](O[C@@H]3COCC(O)=O)O[C@@H]3[C@@H](CO)O[C@H](O[C@@H]4[C@@H](CO)O[C@H](O[C@@H]5[C@@H](CO)O[C@H](O[C@H]1[C@H](OCC(O)=O)[C@H]2O)[C@H](O)[C@H]5OCC(O)=O)[C@H](O)[C@H]4OCC(O)=O)[C@H](O)[C@H]3OCC(O)=O CUJVBAPGYBSBHJ-YWBSARSQSA-N 0.000 description 3
- 241000191967 Staphylococcus aureus Species 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000809 air pollutant Substances 0.000 description 3
- 231100001243 air pollutant Toxicity 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000000241 respiratory effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000004753 textile Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 241001337994 Cryptococcus <scale insect> Species 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 229950000845 politef Drugs 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0015—Electro-spinning characterised by the initial state of the material
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
- A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
- A41D13/1192—Protective face masks, e.g. for surgical use, or for use in foul atmospheres with antimicrobial agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/02—Preparation of spinning solutions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0276—Polyester fibres
Abstract
A method for making a composite nanofiber comprising the steps of: providing an electrospinning solution comprising polymethylmethacrylate or a derivative thereof, chitosan, an oligomer adsorbent, and a solvent, and the solvent comprises formic acid; and forming a plurality of nano fibers by electrostatic spinning the electrospinning solution. The invention also provides a composite nanofiber prepared by the preparation method, wherein the diameter of the composite nanofiber is less than 250 nm. The composite nano fiber prepared by the method has a thinner diameter, and the mask with good air filtering effect can be prepared without additionally applying electrostatic treatment or adding activated carbon to the base layer, so that the manufacturing cost can be saved.
Description
Technical field
The present invention relates to the preparation method of a kind of composite nano fiber, particularly relate to the preparation method that a kind of use includes the electrospun solution of formic acid solvent, and obtained composite nano fiber, filtering layer body and there is the mask of this filtering layer body.
Background technology
Along with science and technology is maked rapid progress and densely populated, causing the environmental pollutions such as air the most increasingly severe, common air pollutants, in addition to poisonous chemical substance, also comprise powder dust particle (such as PM2.5And PM10) and the pathogen (such as staphylococcus aureus, cryptococcus, mycete and virus) such as antibacterial.
General often use has the mask of filtering layer body or air filtering core to intercept and to adsorb air pollutants, is usually and gives Electrostatic Treatment on adhesive-bonded fabric surface or add activated carbon adsorbent, so as to reaching the effect of air filtering.But, Electrostatic Treatment or activated carbon is the most expensive and filter capacity for various air pollutants still has to be hoisted.
Summary of the invention
The first object of the present invention is to provide the preparation method of a kind of composite nano fiber, the composite nano fiber that diameter is thinner can be prepared, and it is not required to additionally apply Electrostatic Treatment or add the mask that activated carbon can be prepared by having good air filtration effect, and cost of manufacture can be saved.
The preparation method of the composite nano fiber of the present invention, offer electrospun solution is provided, including polymethyl methacrylate or derivatives thereof, spherical chitosan, oligomer adsorbent and solvent, spherical chitosan and this oligomer adsorbent are dissolvable in water this solvent, and this solvent includes formic acid；And this electrospun solution is formed multiple nanofiber by electrostatic spinning.
The second object of the present invention is the composite nano fiber providing a kind of preparation method as above to prepare, and its diameter is less than 250nm.
The third object of the present invention is to provide a kind of filtering layer body, comprises: a basic unit and a filter course.This basic unit is loose structure.This filter course is arranged in this basic unit and is multi-pore structure, and this filter course is made up of composite nano fiber as above stacking.
The fourth object of the present invention is to provide a kind of mask, comprises: a bottom, a filtering layer body as above and a top layer.This filtering layer body is laid on this bottom.This top layer is laid on this filtering layer body.
The beneficial effects of the present invention is: by using formic acid as solvent, the composite nano fiber that diameter is thinner can be prepared, the filter course that its stacking is constituted has concurrently and allows air be easier to by and strongly intercept the ability of powder dust particle and antibacterial, it is not required to this basic unit additionally applies Electrostatic Treatment or adds the mask that activated carbon can be prepared by having good air filtration effect, and manufacturing cost can be saved.
Hereinafter will be described in detail with regard to present invention:
It is preferred that described nanofiber is to be formed by this electrostatic spinning under contacting with gas, this gas includes formic acid steam.By the contact of formic acid steam, diameter more uniform spinning product can be formed, and the process that can be prevented effectively from electrostatic spinning is blocked.More preferably, the temperature range of this gas is 20-30 DEG C.
It is preferred that this electrospun solution also includes electrolyte, to increase the conductive capability of solution.It is preferred that this electrolyte accounts for the 0.1-3wt% of this electrospun solution.More preferably, this electrolyte accounts for the 0.5wt% of this electrospun solution.It is preferred that this electrolyte is sodium chloride.
It is preferred that this oligomer adsorbent is selected from cyclodextrin, Methyl flamprop, hydroxypropyl cyclodextrin, carboxymethyl cyclodextrin or a combination thereof.In a particular embodiment of the present invention, this oligomer adsorbent is carboxymethyl-beta-cyclodextrin (carboxymethyl-β-cyclodextrin, CM-β-CD).
It is preferred that in this electrospun solution, spherical chitosan is 0.1-0.25 with the part by weight scope of polymethyl methacrylate or derivatives thereof.If spherical chitosan is too high or too low with the part by weight of polymethyl methacrylate or derivatives thereof is neither easily formed fiber.
It is preferred that the voltage range of this electrostatic spinning is 14-20kV.If voltage is less than 14kV, owing to electric repulsion is not enough, it is easily caused too much electrospun solution and assembles and drip；If voltage is more than 20kV, easily causes the electric discharge of spinning syringe needle and make electrostatic spinning process interrupt.More preferably, the voltage range of this electrostatic spinning is 14-15kV.
It is preferred that in this electrostatic spinning, the flow rates of this electrospun solution is 0.001-0.15mL/min.If flow velocity is less than 0.001mL/min, it is difficult to be effectively formed the taylor cone (Taylorcone) needed for electrospinning；If flow velocity is more than 0.15mL/min, it is difficult to obtain uniformly and continuous print spinning product.More preferably, in this electrostatic spinning, the flow rates of this electrospun solution is 0.015-0.1mL/min.
It is preferred that the operating environment temperature of this electrostatic spinning be 15 DEG C less than 30 DEG C.If operating environment temperature is more than 30 DEG C, easily makes the solvent volatilization in this electrospun solution too fast, and be difficult to obtain uniform and complete spinning product.In a particular embodiment of the present invention, the operating environment temperature of this electrostatic spinning is 28 DEG C.
When this composite nano fiber diameter is not less than 500nm, this filtering layer body is poor for the filter effect of powder dust particle.It is preferred that the diameter of this composite nano fiber is less than 250nm.
It is preferred that the average pore size of the filter course of the filtering layer body of the present invention is 10nm to 1 μm.Hole less than 10nm can cause air less easily by mask, it then can be made to reduce for the filter effect of powder dust particle more than the hole of 1 μm.
It is preferred that the thickness of this filter course is 200nm to 5 μm.When thickness is less than 200nm, the poor filtration effect of powder dust particle, and when thickness is more than 5 μm, air, less easily by mask, can make air impedance rate too high and breathing is caused resistance.More preferably, the thickness of this filter course is 500nm to 1 μm.
It is preferred that the mask of the present invention is by bonded to each other to this bottom, this filtering layer body and this top layer, and being turned down by the periphery of this bottom fixing, form an entirety, this mask also comprises two ear-hangs, and described ear-hang is installed in two contrary short sides of this entirety respectively.
Accompanying drawing explanation
Other the feature of the present invention and effect, will clearly present, wherein in embodiment referring to the drawings:
Fig. 1 is side view, and the embodiment of filtering layer body of the present invention is described；
Fig. 2 is sweep electron microscope photo, and the outward appearance of filtering layer body of the present invention is described；And
Fig. 3 is three-dimensional exploded view, and the mask of application examples of the present invention is described.
Detailed description of the invention
The present invention will be described further with regard to following example, however, it should be noted that this embodiment only illustrates use, and be not necessarily to be construed as the restriction that the present invention implements.
Embodiment
Refering to Fig. 1, the embodiment of filtering layer body 2 of the present invention comprises a basic unit 21 and a filter course 22.This basic unit 21 is loose structure.In the examples below, this basic unit 21 uses polypropylene melt-blown adhesive-bonded fabric.
＜ embodiment 1 ＞
[electrospun solution preparation]
By 0.5g carboxymethyl-beta-cyclodextrin (CM-β-CD, according to ZhanhuaHuang et al. at CarbohydratePolymers, 2012, method synthesis disclosed in 88,609-617), 0.5g spherical chitosan, (PMMA, purchased from CHONEYEPURECHEMICAL for 2.0g polymethyl methacrylate, weight average molecular weight is 120,000) and 25mL formic acid mixing, with Magnetitum stir 1 day to uniform dissolution, obtain electrospun solution S1.
[electrostatic spinning]
Take up above-mentioned electrospun solution S1 with Glass syringe syringe, this syringe is connected rustless steel syringe needle by politef (PTFE) pipe, and is installed on micropump.There is provided high-tension electricity in this rustless steel syringe needle, make this electrospun solution S1 carry out electrostatic spinning, and collect the spinning product E1 formed with polypropylene melt-blown adhesive-bonded fabric, so that this spinning product constitutes a filter course 22 in the upper stacking of this adhesive-bonded fabric (basic unit 21).Electrostatic spinning operating parameter sets as follows: voltage is 0.015mL/min as 15kV, flow velocity, and ambient temperature is 28 DEG C, and this rustless steel Needle outlet and this adhesive-bonded fabric distance are 12cm.
＜ embodiment 2-7 ＞
The compound method of the electrospun solution S2-S7 of embodiment 2-7 is similar to Example 1, is the consumption of polymethyl methacrylate (PMMA) is changed into 2.5g, 3g, 3.5g, 4g, 4.5g, 5g respectively at difference.Spinning product E2-E7 is respectively obtained after carrying out above-mentioned electrostatic spinning.
[sweep electron microscope (SEM) observation]
Utilizing the filter course 22 that scanning electron-microscopic observation embodiment 4 obtains, result is as in figure 2 it is shown, display spinning product E4 is the fiber of nanoscale.
Analyze and calculate the diameter (sampling 20 times) of nanofiber in Fig. 2 with ImageJ software unified test, the average diameter of result display spinning product E4 is 200nm.
[hole test]
Test sample is prepared with aforementioned method of electrostatic spinning.Wherein, use the wire gauze of ground connection to replace this basic unit 21, directly collect the spinning product formed with this wire gauze, it is thus achieved that test sample.
Use isothermal nitrogen adsorption/desorption instrument (BET；Model is QUANTACHROME, Autosorb-1) measure hole.Test sample elder generation is 1 × 10 through 30 DEG C and pressure-5Under the state of mmHg, evacuation degassing processing is after 12 hours, it is placed in the experiment carrying out inhaling/be desorbed in instrument again, equilibrium adsorption capacity measured after experiment, calculates via BET (Brunauer-Emmett-Teller) equation and learns specific surface area (m2/ g), and in different relative pressure (P/P0The adsorbance of sample is recorded under), more respectively with the pore-size distribution of method calculating mesopore (mesopore) of BJH (Barrett-Joyner-Halendamethod) and DFT (DensityFunctionalTheorymethod) with micropore (micropore).These computational methods belong to prior art, do not repeat them here.
The sample hole of the present embodiment E1-E7 after tested, all between 10nm to 1 μm.By adjusting the operation of electrospun solution and electrostatic spinning, pore size can be controlled further.
Application examples
Refering to Fig. 3, the application examples of the present invention is a mask.This mask comprises 3, filtering layer body 2 of a bottom and a top layer 4.This bottom 3 is waterproof layer, has the effectiveness preventing the spittle to be infected with.This filtering layer body 2 is the filtering layer body obtained by above-described embodiment 4, and is laid on this bottom 3.This top layer 4 is water accepting layer, is laid on this filtering layer body 2.
By aforementioned three layers bonded to each other, and the periphery of this bottom 3 is turned down, then uses hot melt laminating or sewing fixing, form an entirety, and install ear-hang 5 respectively in two contrary short sides, form this mask.
[test of air impedance rate & powder dust particle penetrance]
According to NIOSHN95 standard testing air impedance rate and powder dust particle penetrance.Wherein air impedance rate represents with pressure reduction, and relatively low pressure reduction represents air and is easier to pass through mask.As a percentage, the ability intercepting powder dust particle that relatively low powder dust particle penetrance represents mask is stronger for powder dust particle penetrance.
Should the air impedance rate of mask of use-case less than 20mmH2O, shows that it has relatively low respiratory resistance.And for the particle penetration rate of particle diameter 300nm below 1.6%, show that it has splendid filter effect.Good mask should possess the advantage that respiratory resistance is little and filter effect is good, and therefore, (unit area impedance is 25mmH in the requirement of contrast N95 type mask2Below O, the particle penetration rate of particle diameter 300nm are less than 5%), the mask of the present invention has lower respiratory resistance and more preferably filter effect.
[bacterial filtration efficiency test]
Testing bacterial filtration efficiency according to CNS14775T4037-2003, use the biological aerosol of staphylococcus aureus (ATCC6538), mean diameter is 2.9 μm, and test area is 39.5cm2.As a percentage, higher bacterial filtration efficiency represents antibacterial and is less susceptible to pass through mask bacterial filtration efficiency.
The bacterial filtration efficiency of mask of use-case should reach 99.54% (be repeated 5 times and averaged, the average colony number of matched group is 2229CFU), show that it has good bacterium blocking effect.
[antibacterial textile test]
Testing bacteria reducing rate according to U.S. AATCC100 (version in 2012) antibacterial textile, test strain is staphylococcus aureus.As a percentage, the antibacterial effect that higher bacteria reducing rate represents textile is preferable for bacteria reducing rate.
Should the bacteria reducing rate of mask of use-case higher than 99.9%, show that it has splendid antibacterial effect.
In sum, the preparation method of composite nano fiber of the present invention is by using formic acid as the solvent of electrospun solution, the composite nano fiber that diameter is thinner can be prepared, its stacking constitutes this filter course 22 and has relatively low air impedance rate, powder dust particle penetrance and higher bacterial filtration efficiency with the mask made, it is not required to this basic unit 21 additionally apply Electrostatic Treatment or adds activated carbon can be prepared by, and cost of manufacture can be saved, so really can reach the purpose of the present invention.
The above, only embodiments of the invention, when not limiting, with this, the scope that the present invention implements, the most all simple equivalences made according to claims of the present invention and description change and modify, and the most still belong to the scope of the present invention.
Claims (10)
1. the preparation method of a composite nano fiber, it is characterised in that it comprises the steps of
Thering is provided electrospun solution, including polymethyl methacrylate or derivatives thereof, spherical chitosan, oligomer adsorbent and solvent, spherical chitosan and this oligomer adsorbent are dissolvable in water this solvent, and this solvent includes formic acid；And
This electrospun solution is formed multiple nanofiber by electrostatic spinning.
Preparation method the most according to claim 1, it is characterised in that: this oligomer adsorbent is selected from cyclodextrin, Methyl flamprop, hydroxypropyl cyclodextrin, carboxymethyl cyclodextrin or a combination thereof.
Preparation method the most according to claim 1, it is characterised in that: in this electrospun solution, spherical chitosan is 0.1-0.25 with the part by weight scope of polymethyl methacrylate or derivatives thereof.
Preparation method the most according to claim 1, it is characterised in that: the voltage range of this electrostatic spinning is 14-20kV.
Preparation method the most according to claim 1, it is characterised in that: in this electrostatic spinning, the flow rates of this electrospun solution is 0.001-0.15mL/min.
6. the composite nano fiber that a preparation method according to claim 1 prepares, it is characterised in that its diameter is less than 250nm.
7. a filtering layer body, it is characterised in that it comprises:
One basic unit, this basic unit is loose structure；And
One filter course, is arranged in this basic unit and for multi-pore structure, and this filter course is made up of composite nano fiber according to claim 6 stacking.
Filtering layer body the most according to claim 7, it is characterised in that: the average pore size of this filter course is 10nm to 1 μm.
9. a mask, it is characterised in that it comprises:
One bottom；
One filtering layer body according to claim 7, is laid on this bottom；And
One top layer, is laid on this filtering layer body.
Mask the most according to claim 9, it is characterized in that: by bonded to each other to this bottom, this filtering layer body and this top layer, and the periphery of this bottom is turned down fixing, form an entirety, this mask also comprises two ear-hangs, and described ear-hang is installed in two contrary short sides of this entirety respectively.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW104201289 | 2015-01-27 | ||
| TW104201289 | 2015-01-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105821493A true CN105821493A (en) | 2016-08-03 |
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| CN201510730762.1A Pending CN105821493A (en) | 2015-01-27 | 2015-11-02 | Method for preparing composite nanofiber, composite nanofiber prepared by method, filter layer body and mask with filter layer body |
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| CN113174653A (en) * | 2021-05-26 | 2021-07-27 | 南京塞僧传感技术有限公司 | PVA/HCD nano composite fiber, preparation method and application |
| CN113455758A (en) * | 2021-07-06 | 2021-10-01 | 上海煤科检测技术有限公司 | Mask for removing volatile organic compounds |
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| CN113174653A (en) * | 2021-05-26 | 2021-07-27 | 南京塞僧传感技术有限公司 | PVA/HCD nano composite fiber, preparation method and application |
| CN113455758A (en) * | 2021-07-06 | 2021-10-01 | 上海煤科检测技术有限公司 | Mask for removing volatile organic compounds |
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| TW201627051A (en) | 2016-08-01 |
| TWI546115B (en) | 2016-08-21 |
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