Invention content
The purpose of the present invention is for be most badly in need of at present solve air pollution problems inherent, according to the new spy of current atmosphere pollution
Point, provide a kind of antimicrobial form eliminates PM2.5Air purification film.The purification membrane is total by nano graphene oxide and fluorescence
The addition of conjugated polymer component, collection eliminate PM2.5, antibacterial and monitoring etc. it is multi-functional in one, PM can be improved2.5Removal rate, and
With good bactericidal effect.
The technical scheme is that:
A kind of multifunctional air purifying film, the multifunctional air purifying film are one of following two:
The first air purification film, including basement membrane, and it is supported on epilamellar Multifunctional layered;Wherein, every square metre of base
Load has 0.8~10g Multifunctional layereds on film;The Multifunctional layered is the mixed of nano graphene oxide and fluorescent conjugated polymer
Object is closed, mass ratio is graphene oxide:Fluorescent conjugated polymer=5~20:1;The basement membrane is non-woven fabrics;
Alternatively, second of air purification film, is high-molecular organic material, nano graphene oxide and fluorescent conjugated polymer
Spray fusing after mixing and obtain, using the purification membrane aperture be 0.2~12 μm, thickness be 500~5000 μm;Wherein, mass ratio
For high-molecular organic material:Nano graphene oxide:Fluorescent conjugated polymer=50-300:3-6:1.
The material or high molecular material of the non-woven fabrics be polyvinyl chloride (PVC), polymethyl methacrylate (PMMA),
Polymethyl acrylate (PC), polystyrene (PS), ethylene-vinyl acetate copolymer (EVA), ethylene-octene copolymer (POE),
Polypropylene (PP), polyethylene terephthalate (PET), poly- propionitrile (PAN), polyether sulfone (PES), gathers partially polyethylene (PE)
One kind in vinyl fluoride (PVDF).
The nano graphene oxide is the graphene oxide of a diameter of 10-2000nm;The nano graphene oxide is
The graphene oxide that the atom number of plies is 1-10 layers.
The fluorescent conjugated polymer includes:Pyridyl group porphyrin, phenyl porphyrin, methylenum careuleum, toluidine blue, haematoporphyrin, two
Hydrogen porphines, poly- [3- (2 '-N, N, N- triithylamine base -1 '-ethyoxyl) -4- methylthiophenes hydrochloride], poly- 3- (Isosorbide-5-Nitraes-dioxa -
6- brominations trimethylamine groups-hexyl) thiophene-co-3- (1,4,7- trioxas-octyl) thiophene.
The preparation method of the first multifunctional air purifying film, includes the following steps:
(1) mixed liquor is obtained after mixing nano graphene oxide solution and fluorescent polymer solution, then using coating
Method or infusion method are assembled on basement membrane;Wherein, a concentration of 0.1mg/mL~10mg/mL of nano graphene oxide aqueous solution, it is glimmering
A concentration of 0.1mg/mL~10mg/mL of the aqueous solution of photopolymer;Mass ratio is graphene oxide:Fluorescent conjugated polymer=
5~20:1;The basement membrane is non-woven fabrics;
The infusion method, includes the following steps:It will be immersed in mixed liquor on basement membrane, after impregnating 1-12 hours, then adopt
Take the mode of suction filtration by mixed liquor nano graphene oxide solution and fluorescent polymer be supported on basement membrane;Every square metre of base
Load has 0.8~10g nano graphene oxides solution and fluorescent polymer on film;
The cladding process, includes the following steps:By mixed liquor with membrane surface is coated onto, coating number is 1-20 times, is made
Adhere to 0.8~10g nano graphene oxides solution and fluorescent polymer on every square metre of basement membrane;
(2) in the organic basement membrane merging vacuum drying chamber obtained upper step, 20-60 DEG C, vacuum degree is under 100-1000Pa
Drying time is 1-24 hours.
The preparation method of second of multifunctional air purifying film, includes the following steps:
(1) organic polymer is melted at 120-160 DEG C;
(2) and then nano graphene oxide solution and fluorescent conjugated polymer solution is added, stirs evenly, wherein nanometer
A concentration of 0.1mg/mL~10mg/mL of graphene oxide water solution, a concentration of 0.1mg/mL of the aqueous solution of fluorescent polymer
~10mg/mL;Mass ratio is high-molecular organic material:Nano graphene oxide:Fluorescent conjugated polymer=50-300:3-6:1;
(3) spray fusing method is utilized to be film-made, it is 0.2~6 μm to obtain membrane aperture;The thickness of film is 500~5000 μm;
(4) by film made from upper step at 20-60 DEG C, vacuum degree is that drying is 1-10 hours under 100-500Pa, obtains second
Kind multifunctional air purifying film.
A kind of fluorescent conjugated polymer, the polymer are poly- 3- (Isosorbide-5-Nitrae-dioxa -6- brominations trimethylamine groups-hexyl) thiophene
Pheno-co-3- (Isosorbide-5-Nitrae, 7- trioxas-octyl) thiophene, structural formula are as follows:
Wherein, m1m2For the degree of polymerization, m1=1-10;m2=1-10.
The present invention substantive distinguishing features be:
Graphene oxide is the oxide of graphene, it is inside graphene and surrounding is connected to oxygen-containing group at random,
It is easy to further functionalization, can be combined with other molecules by a variety of non-covalent bonds such as hydrophobic effect, electrostatic interaction.
Graphene oxide derives from a wealth of sources, cheap, and intensity is high, and controllability is strong, meets the requirement of the big production of scale.
Fluorescent conjugated polymer is made up of many extinction units conjugation, thus catches light ability with extremely strong.
Nineteen ninety-five, Swager are put forward for the first time the concept of fluorescent conjugated polymer fluorescence signal enlarge-effect, when in detection architecture exist by
When body molecule, the energy of polymer capture can carry out delocalization along entire conjugated backbone, be ultimately transferred to acceptor molecule to put
Its big fluorescence signal (i.e. " molecular line effect "), this is particularly significant for improving imaging and diagnostic sensitivity.Small molecule is passed
Sense system, when Small-molecule probe and detected material effect, detected material is one-to-one with small molecule, if detected material
Concentration be less than Small-molecule probe concentration, only part sensor molecules generate response, so the sensing system based on small molecule
Sensitivity can not be comparable with fluorescent conjugated polymer.It can be at double using the fluorescence signal amplification characteristic of fluorescent conjugated polymer
Ground improves detection sensitivity, and new sensing modes are provided for the development of biosensor.Water soluble fluorescent conjugated polymer with
The surfaces such as bacterium, fungi and virus combine, and can generate singlet oxygen under white light illumination as light-sensitive material and reach sterilization
Effect in addition, fluorescent conjugated polymer for light power antimicrobial chemical therapy show toxic side effect it is small, to different types of disease
Opportunistic pathogen has many advantages, such as bactericidal effect, and compared with antibiotic, it is not easy to which in-ductive drug -tolerance is a kind of efficiently excellent antibacterial
Method.Purification membrane made by us uses the graphene oxide after ultrasonication, and graphene oxide layer is become smaller, then
Group loads onto fluorescent conjugated polymer, is added to high-molecular organic material basement membrane, overcomes some technological difficulties, greatly improves and inhales
Attached PM2.5It is realized while efficiency and kills harmful bacteria in purifying air event.
Beneficial effects of the present invention are:
The antimicrobial form that the present invention obtains eliminates PM2.5Air purification film, compared with traditional antibacterial, have efficiently,
The features such as antibacterial, usage time length etc..
(1) air-filtering membrane provided by the invention is to the PM in air2.5Removal rate height up to 95% or so, it is completely full
Sufficient PM2.5Protection requirements.
(2) air purification film provided by the invention has killing effect, antibiotic rate to bacterium, fungi, pathogen in air
Up to 90% or more.
(3) air purification film provided by the invention can monitor the PM for being adsorbed on purification film surface in real time2.5And all kinds of cause of diseases
Bacterium.
(4) service life of air purification film provided by the invention is long, and existing air-filtering membrane at most uses in the market
300 hours, air purification film service life provided by the invention was up to 1000 hours.
(5) air purification film provided by the invention uses electrostatic knot compared with existing air purification film currently on the market
It closes, Absorptive complex wave, not will produce reentrainment of dust pollution.
Embodiment 1,
The first step prepares nano graphene oxide aqueous solution:
Graphene oxide is taken to dissolve, the ultrasonic disperse in ice bath, ultrasonic power 100W, ultrasound 60 minutes.Size can be obtained about
For the graphene oxide of 350nm, the atom number of plies is single layer.Dried for standby.
0.5g nano graphene oxides obtained above are taken, are dissolved into 1000mL ultra-pure waters, receiving for 0.5mg/mL is obtained
Rice graphene oxide water solution;
It is prepared by second step, conjugated polymer:
Monomer (1) 3- (1,4- dioxa -6- hydroxy-hexanes base) thiophene synthesis route:
45mL pyridines, diethylene glycol 15mL (16.75g, 157.8mmol), (5.6g, 49.9mmol), cuprous iodide is added
(1.4g, 7.34mmol) is added 3 bromo thiophene (5.16g, 31.6mmol) after being stirred to react 30min, rises to 100 DEG C, reaction
24h.Reaction solution is cooled to room temperature, dichloromethane dilution is added, filters, it is dry, obtain product pale yellowish oil liquid (4.16g,
Yield 70%).
The characterization of product:1H NMR(400MHz,CDCl3,ppm):):(400MHzdd,1H),6.79(dd,1H),6.28
(dd, 1H), 4.13 (t, 2H), 3.85 (t, 2H), 3.77 (t, 2H), 3.67 (t, 2H), 2.16 (s, 1H);13CNMR(100MHz,
CDCl3,ppm):):,1H);13C NMR(100MHz,CDCl3,ppm):2H), 3.67 (t, 2H) characterize datas show:It obtains
Monomer 3- (1,4- dioxa -6- hydroxy-hexanes base) thiophene.
Monomer (2) 3- (1,4- dioxa -6- p-methyl benzenesulfonic acid base-hexyl) thiophene synthesis route:
Monomer (1) (1.16g, 6.17mmol) is dissolved in dichloromethane, 0 DEG C is cooled in ice-water bath, pyridine 1mL is added.
TsCl (1.8g, 9.44mmol) is added, the reaction was continued for 24 hours.Use CH2Cl2Extraction, it is dry then with washing, it concentrates, purifying, most
Light yellow solid (1.62g, 76%) is obtained eventually.
The characterization of product:1H NMR(400MHz,CDCl3,ppm):):(400MHz,CDCl3,ppm):Hz,CDCl3,
Ppmdd, 1H), 6.75 (dd, 1H), 6.23 (dd, 1H), 4.19 (dd, 2H), 4.03 (dd, 2H), 3.76 (m, 4H), 2.42 (s,
3H).13C NMR(100MHz,CDCl3,ppm):):m,4H),2.42(s,3H).13C NMR(100MHz,CDCl3,),2H)
Dd, 2H) H) Calcd.C 52.63, H 5.26, Found C 53.02, H 5.96. characterize datas show:Monomer 3- is obtained
(1,4- dioxa -6- p-methyl benzenesulfonic acid base-hexyl)
The synthesis of monomer (3) 3- (the bromo- hexyls of 1,4- dioxas -6-) thiophene:
Monomer (2) (0.62g, 1.81mmol) is dissolved in 15mL acetone, addition LiBrH2O (0.68g,
6.48mmol), 8h is reacted.It is dry after extraction, it concentrates, purifying obtains pale yellow oily liquid (0.41g, 90%).
The characterization of product:1H NMR(400MHz,CDCl3,ppm):):(400MHz,CDCl3,ppm):dd,1H),6.27
(dd, 1H), 4.13 (dd, 2H), 3.87 (m, 4H), 3.49 (t, 2H) .13C NMR (100MHz, CDCl3, ppm):)=157.4,
124.7,119.5,97.6,71.4,69.9,69.6,69.5.MS(EI):M/z=250,252 (M) .C8H11O2SBr:
Calcd.C 38.24, H 4.38, Found C 38.72, H 4.68. characterize datas show:Monomer 3- (1,4- dioxies are obtained
The miscellaneous bromo- hexyls of -6-) thiophene
The synthesis of monomer (4) 3- (1,4- dioxa -6- brominations trimethylamine groups-hexyl) thiophene:
Monomer (3) (1.23g, 4.9mmol) is dissolved in tetrahydrofuran, methanol solution, overnight, reaction stops for 40 DEG C of reactions
And after being cooled to room temperature, rotate, dissolving, 40mL n-hexanes are added and are settled out solid, centrifuges to obtain precipitation, it is solid that white is obtained after dry
Body (1.44g, 94.7%).
The characterization of product:1H NMR(400MHz,CDCl3,ppm):):(400MHzdd,1H),6.27(dd,1H),4.13
(dd,2H),4.12(dd,2H),4.03(t,4H),3.89(dd,2H),3.50(s,9H).13C NMR(100MHz,CDCl3,
ppm):):,3.50(s,9H).13C NMR(100MHz,CDCl3,ppm)::C NMR MS(ESI):M/z=
230.12.C11H20O2BrNO2S:Calcd.C 42.58,H 6.45,N 4.52Found C 41.72,H 6.66,N 4.49.
Characterize data shows:Monomer 3- (1,4- dioxa -6- brominations trimethylamine groups-hexyl) thiophene is obtained
The synthesis of monomer (5) 3- (1,4,7- trioxas-octyl) thiophene:
2,6- lutidines, diethylene glycol monomethyl ether (5.89g, 49.1mmol), uncle are sequentially added in two mouth flask
Butyl potassium alcoholate (3.58g, 32mmol) cuprous iodide (608mg, 0.36mmol), stirs evenly, and 3- bromine thiophenes are added after reacting 30min
The lutidines solution of pheno (5.16g, 31.6mmol), reaction is overnight.Reaction solution is cooled to room temperature, is filtered, is washed, is done
It is dry, it concentrates, chromatography, dry brown liquid (5.1g, 80%).
The characterization of product:1H NMR (400MHz, CDCl3, ppm):):(400MHdd,1H),6.78(dd,1H),6.26
(dd,1H),4.13(t,2H),3.85(t,2H),3.71(dd,2H),3.58(dd,2H),3.39(s,3H).13C NMR
(100MHz, CDCl3, ppm):=157.6,124.6,119.6,97.5,72.0,70.7,69.7,69.5,59.1.MS (EI):
M/z=202 (M) .C9H14O3S:Calcd.C 53.46, H 6.93, Found C 53.27, H 7.29. characterize datas show:
Monomer 3- (1,4,7- trioxas-octyl) thiophene is obtained
Poly- 3- (1,4- dioxa -6- brominations trimethylamine groups-hexyl) thiophene-co-3- (1,4,7- trioxas-octyl)
The synthesis of thiophene (PT):
10mL chloroforms are sequentially added in reaction bulb, monomer (4) is then added dropwise in anhydrous ferric trichloride (325mg, 2mmol)
(155mg, 0.5mmol) and monomer (5) (101mg, 0.5mmol) reacts at room temperature 2 days.It is sudden that methanol is added into reaction mixture
It goes out reaction, centrifugation, methanol/chloroform (1:1) it washs, tetrabutylammonium chloride is then added, generate black precipitate.Precipitation is filtered,
Filter cake again with methanol dissolves, and hydrazine hydrate, solution is added to be spin-dried for, and washs, and utilizes the bag filter dialysis 2 that molecular cut off is 3500Da
It;Solvent is removed, solid is dried to obtain.
The characterization of product:1H NMR(400MHz,CDCl3,ppm):):(400MHz,CDbr),4.50-4.18(br),
3.81-3.02(br),2.68-2.61(br),1.87(br).Characterize data shows:Poly- 3- (1,4- dioxa -6- bromines are obtained
Change trimethylamine groups-hexyl) thiophene-co-3- (1,4,7- trioxas-octyl) thiophene (PT)
The fluorescent conjugated polymer, poly- 3- (Isosorbide-5-Nitrae-dioxa -6- brominations trimethylamine groups-hexyl) thiophene-co-3-
(1,4,7- trioxas-octyl) thiophene (PT) structural formula is as shown below:
Wherein, m1m2For polymer, m1Value range:1-10;m2Value range is 1-10.
Third walks, and configures the aqueous solution of fluorescent conjugated polymer:
Fluorescent conjugated polymer:Poly- 3- (1,4- dioxa -6- brominations trimethylamine groups-hexyl) thiophene-co-3- (1,4,
7- trioxas-octyl) thiophene (PT) solution preparation:It takes 0.01g PT to be added in 10mL ultra-pure waters, obtains 1mg/mL storages
Liquid.
4th step, the preparation of multifunctional air purifying film:
(1) by prefabricated non-woven fabrics according to requiring to be cut into right dimensions and shapes.The non-woven fabrics polypropylene
Material, size are 25cm × 25cm, and aperture is 2000 μm;
(2) the nano graphene oxide aqueous solution of a concentration of 0.5mg/mL of 100mL is prepared;
(3) fluorescent conjugated polymer in dilution third step is to 0.1mg/mL;Take 100mL;
(4) mixed liquor is obtained after mixing nano graphene oxide solution obtained above and fluorescent polymer solution, so
It will be immersed in mixed liquor on high-molecular organic material basement membrane afterwards, after impregnating 1 hour, then take the mode repeatedly filtered that will mix
Nano graphene oxide solution and fluorescent polymer in liquid are all supported on basement membrane (mark is that filtrate is clarified);It often puts down at this time
Load has 0.960g nano graphene oxides solution and fluorescent polymer on square rice basement membrane;
(5) in the basement membrane merging vacuum drying chamber obtained upper step, 30 DEG C, 200Pa, drying time:12 hours, obtain this
The used purification membrane of invention.
It verifies purification membrane and adsorbs PM2.5Ability (this embodiment is with reference to People's Republic of China (PRC) environment protectment protection HJ
656-2013 and HJ 618-2013):
(a) particle PM is adopted by used on air sampler in Laboratory Module2.5And PM10Sampling film, take four, respectively
Mark A, B and A ', B ' according to People's Republic of China's environment protectment protection HJ 656-2013 processing,
(b) test process:According to the national standard GB-T14295-2008 identical Laboratory Modules 1 established and Laboratory Module 2.
In Laboratory Module 1, after generating smog using aerosol producer, opens sampler and collected in laboratory respectively using sampling film A, B
PM2.5And PM10Particle, collect 2h after, obtain initial p M in Laboratory Module2.5And PM10Concentration value.In Laboratory Module 2, cigarette is used
After fog generator generates smog, purifier of the unlatching equipped with air purification film 3 hours.After purification, it is then turned on sampler
PM in laboratory is collected using sampling film A ', B '2.5And PM10Particle, obtain PM in the rear deck of Laboratory Module internal filter filtering2.5
And PM10Concentration value.
Result of calculation PM2.5And PM10Concentration, unit be μ g/m3。
With reference to the accompanying drawings 2, it can obtain the indoor PM before opening air filter2.5And PM10Concentration and used air mistake
PM in filter rear chamber2.5And PM10Concentration, you can obtain self-control purification membrane and reduce room air PM2.5And PM10The ability of concentration.
As a result it can show, use PM in Laboratory Module after purification membrane2.5And PM10Amount reduce.It demonstrates and purifies sky using purification membrane of the present invention
The ability of gas.
Verifying purification membrane antibacterial ability, (this embodiment is with reference to People's Republic of China (PRC) environment protectment protection GB 21551.3-
2010):
(a) picking E.coli single bacteriums fall in 5mL LB culture mediums (in 50 in (B551.3-20) 37 culture 12h;
(b) PBS (PBS concrete compositions are used:Sodium chloride 4g, potassium chloride 0.1g, disodium hydrogen phosphate 0.71g, potassium dihydrogen phosphate
0.135g is dissolved in 500mL ultra-pure waters, ionic strength 137mM PH=7.4) wash bacterium 3 times, then wash bacterium with PBS suspensions;
(c) suspended bacteria 10 is adjusted7Cfu/mL;
(d) bacterium solution in being walked on 10 μ L is taken, 990 μ L PBS is added, drips to the non-woven fabrics and Ben Fa of 1cm × 1cm respectively
In bright purification membrane;
(e) purification membrane of non-woven fabrics in upper step and the present invention is respectively put into and is put into holes among 12 orifice plates, side hole adds
Enter 3mL ultra-pure waters.It is put into 37 DEG C of culture 3h in incubator;
(f) it washes bacterium with 1mL PBS respectively in three times, collects, suspended again using 1mL PBS;
(g) bacterium solution, each concentration take 50 μ L coated plates in step on gradient dilution, are put into 37 DEG C of culture 12h in incubator;
(h) tablet observation is taken out to count.
With reference to the accompanying drawings 3 as a result, it was observed that, the dot on tablet a, point represents a bacterium, uses Laboratory Module after purification membrane
Interior bacterium amount declines 90% or so.Demonstrate the ability of purification membrane antibacterial of the present invention.
Detect purification membrane service life:
(a) cigarette smoke generator is opened in the closed Laboratory Module established according to national standard GB-T14295-2008 to be allowed to not
PM is given birth in stopping pregnancy2.5;
(b) it is carried out at the same time filtering using the air purification film of non-woven fabrics and the present invention;
(c) it removed filter membrane every 12 hours to weigh, is put back to again after having weighed and continue to filter, when filter membrane weight no longer becomes
When change, duration is exactly the service life of graphene oxide filter membrane;
When experiment proceeds to 300 hours, non-woven fabrics no longer increases weight, and non-woven fabrics service life is 300 hours.The present invention's
Purification membrane no longer increases weight when proceeding to 1000 hours, and purification membrane service life of the present invention is 1000 hours.
Detect PM2.5Method.
In the Laboratory Module established according to national standard GB-T14295-2008, smog is persistently generated using cigarette smoke generator
Afterwards, it is purified 1 hour using purification membrane.After purification, air purification film is removed, with the naked eye directly observes sample in the UV lamp
Color, compared with original purification membrane is in the color under lamp, fluorescent quenching.