CN108499374A - PVDF composite graphites alkene filter core film and its production technology - Google Patents
PVDF composite graphites alkene filter core film and its production technology Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/30—Polyalkenyl halides
- B01D71/32—Polyalkenyl halides containing fluorine atoms
- B01D71/34—Polyvinylidene fluoride
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0079—Manufacture of membranes comprising organic and inorganic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/12—Composite membranes; Ultra-thin membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/46—Impregnation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/48—Antimicrobial properties
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Abstract
The invention discloses a kind of PVDF composite graphites alkene filter core film and its production technologies, it is poor to solve nano-particle dispersibility in Kynoar, it is easy to happen reunion, the porosity and permeance property of pvdf membrane made of causing have the problem of different degrees of decline, its key points of the technical solution are that a kind of PVDF composite graphites alkene filter core film, it prepares that raw material is composed of the following components, and each component and its mass fraction are as follows：30 ~ 45 parts of PVDF homopolymers, 60 ~ 75 parts of DMAC, 1 ~ 2 part of PVP, 0.5 ~ 2.5 part of modified graphene, spinning film and spinning moulding is made in said components addition reaction kettle, the dispersibility, hydrophily, the mechanical strength that improve filter core raw material components are achieved the effect that, have made filter core that there is stable filtering accuracy.
Description
Technical field
The present invention relates to PVDF filter core films, more particularly to PVDF composite graphites alkene filter core film and its production technology.
Background technology
Nearly 20 years, due to water resources shortage, water pollution getting worse, present family was in order to ensure the safety of drinking water
Property, a large amount of harmful substances in water can be filtered out by water purification filter in the water outlet connection water correction plant of running water pipe.
Ultrafilter is as a kind of water correction plant, and difference lies in it uses filter core films with other purifiers.Filter core
Film is a kind of micropore filtering film that aperture specification is consistent, and it is to be filtered to use using pressure difference as the membrane filtering method of motive force.
There are Kynoar (PVDF) characteristics such as excellent heat resistance, mechanical performance, radiation resistance can be used as making
The material of filter core film, the filter core film made of PVDF can filter out bacterium, virus, while can retain micro necessary to human body
Element.In order to improve the purifying water effect of water purifier, new requirement is also constantly proposed to filter core film properties.
Such as a kind of silver/TiO for the patent disclosure that Authorization Notice No. is CN102989329B2Modified PVDF ultrafiltration membrane and its system
Preparation Method and application, prepare the group of raw material by mass percentage and are divided into：Polyvinylidene fluoride acid 10~18%, pore creating material 0.1~
1.5%, TiO2Nano particle 0.5~6%, silver ion salt 0.01~0.1%, solvent 75~85%.Pvdf membrane tool obtained
Have the characteristics that high hydrophily, catalytic activity and antibiotic property are good.But nano-particle dispersibility in Kynoar is poor, is easy
Reunite, the porosity of manufactured pvdf membrane and permeance property is caused to have different degrees of decline.
Invention content
The first purpose of the invention is to provide the high PVDF composite graphite alkene filter core films of a kind of good dispersion, hydrophily.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of PVDF composite graphites alkene filter core film, prepares that raw material is composed of the following components, and each component and its mass fraction are as follows：
30~45 parts of PVDF homopolymers, 60~75 parts of DMAC, 1~2 part of PVP, 0.5~2.5 part of modified graphene.
By using above-mentioned technical proposal, PVDF possesses excellent corrosion resistance, good mechanical performance, good wear-resisting
Property and low-friction coefficient, good ageing-resistant, high anti-UV, good electrical insulating property and thermal stability, and PVDF homopolymerizations
Object compared to PVDF copolymers there is higher fusing point and preferable temperature tolerance, PVP can play the role of pore-forming, meanwhile, by
In the hydrophily of PVP, PVDF can be modified, make PVDF filter membranes that equally there is preferable hydrophily, make the anti-pollution of filter membrane
Capability improving is contaminated, extends the service life of filter membrane, the addition of modified graphene can promote the structural strength of filter membrane, and make film
Average pore size reduces, simultaneously, moreover it is possible to the hydrophily for promoting film, after functionalization, and dispersibility and phase of the graphene in PVDF
Capacitive has larger promotion, and graphene is avoided agglomeration occur, can also make the size phase in the aperture of filter core film obtained
Closely；DMAC has preferable dissolubility as solvent, to each component, further improves dispersibility, passes through above-mentioned formula system
The dispersibility and hydrophily of the filter core film obtained all improve, meanwhile, also there is preferable structural strength.
Preferably, the modified graphene, which is graphene oxide, is grafted PVP.
By using above-mentioned technical proposal, after graphene is oxidized, property is more active compared with graphene, have it is amphipathic,
PVP is grafted on graphene oxide, the dispersibility for not only improving graphene oxide also improves compatibility, and graphene is avoided to exist
Reunite in PVDF systems.
Preferably, the modified graphene has been also loaded nano silver particles.
By using above-mentioned technical proposal, the PVP remained in modified graphene can play the effect of reducing agent, make silver
Ion can be preferably supported on modified graphene, and the presence of nano silver particles can further increase the dispersion of graphene
Property, enhance the structural strength of filter core film, meanwhile, nano silver particles also have the effect of sterilization, have advanced optimized filter core film
It is functional.
Preferably, the weight average molecular weight of the PVDF homopolymers is 600,000~650,000.
By using above-mentioned technical proposal, if PVDF weight average molecular weight is too low, mechanical strength can decline, manufactured
Pvdf membrane is easy embrittlement, and when PVDF homopolymerization molecular weight is excessive, the viscosity of PVDF also increases, and difficulty can be brought to molding, simultaneously
Modified graphene and PVP can be reduced in the dispersibility of PVDF, PVDF homopolymerization of the weight average molecular weight in 600,000~650,000 ranges
Object has preferable mechanical strength, while the narrow distribution of weight average molecular weight, is conducive to machine-shaping.
Preferably, the PVP is blended by PVP-K30 and PVP-K90 in mass ratio 9: 1.
By using above-mentioned technical proposal, the PVP-K30 of low molecular weight improves the hydrophily and tool of PVP in addition to that can play
Have except pore-forming effect, additionally it is possible to play the effect of plasticising, the PVP-K90 of high molecular weight is added in PVP-K30, can be played
Certain slow releasing function slows down the reaction speeds of PVP-K30 in a solvent, to promote the dispersion effect of PVP.
Second object of the present invention is to provide a kind of production technology of PVDF composite graphites alkene filter core film, makes filter core film
Deviation between aperture is smaller.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of production technology of PVDF composite graphites alkene filter core film, includes following steps：
Step1. by PVDF homopolymers, DMAC, PVP, modified graphene input reaction kettle, set temperature is 85~95 DEG C, system
Obtain spinning solution；
Step2. after spinning solution being stood defoaming, tow is made in spinning moulding；
Step3. by tow mass fraction be 10% ethanol solution in impregnate after ten minutes, put into coagulation tank in impregnate 24~
28h obtains the hollow fiber bundle of aperture stabilization；
Step4. to get filter core film after hollow fiber bundle being dried.
By using above-mentioned technical proposal, mixed raw material can be such that material rapidly divides in a kettle at 85~95 DEG C
It scatters and, and raw material will not directly contact air in a kettle, avoid DMAC moisture absorptions alkalization, and then avoid spinning solution
Premature cure or rupture of membranes after standing defoaming, can make tow smooth surface obtained, avoid wrinkling, by ethyl alcohol and solidification
After pond is impregnated, aperture can be stablized, make the difference very little in the aperture between same a batch of filter core film after drying.
Preferably, the modified graphene before putting into reaction kettle through mass fraction be 4% dilute hydrochloric acid washing 4~
5 times.
By using above-mentioned technical proposal, it can remove in modified graphene and connect by dilute hydrochloric acid washing modified graphene
Remaining PVP during branch, avoiding the increase of the PVP contents in entire component excessively leads to rupture of membranes, meanwhile, dilute hydrochloric acid remains in
After reaction kettle is added in modified graphene surface, it can play and alkalize caused by neutralizing DMAC moisture absorptions, this system is avoided to alkalize, from
And it is not alkaline-resisting without being dissolved in DMAC to avoid PVDF.
Preferably, the PVDF homopolymers dry 3h before preparing input reaction kettle at 80~90 DEG C.
By using above-mentioned technical proposal, PVDF can go out the moisture in PVDF after drying, further avoid
DMAC moisture absorptions cause the possibility that system alkalizes.
Preferably, being added with water and glycerine in the coagulation tank, the mass ratio of the water and glycerine is 4: 1.
By using above-mentioned technical proposal, PVDF tow are immersed in glycerine, can be played the effect of moisturizing guard aperture, be avoided
PVDF tow convection drying and cause hole shrink or collapse, so as to avoid the decline of membrane flux.
In conclusion the invention has the advantages that：
1, the PVDF composite graphites alkene filter core film enhances PVDF filter core films by adding modified graphene in PVDF systems
Structural strength is to enhance the hydrophily of PVDF, and can improve modified graphene and exist by being grafted PVP on graphene oxide
Dispersibility in PVDF systems, is then also loaded nano silver particles on modified graphene, by nano silver particles and PVP,
So that graphene is evenly dispersed in PVDF systems, while can make nano silver particles that can also be evenly dispersed in PVDF
In system, agglomeration is avoided, the filter core film after film forming has preferably at pore size distribution, preferable to make filter core film have
Flux；
2, for the PVDF composite graphites alkene filter core film by the dispersions of nano silver particles, the structure for further improving filter core film is strong
Degree, meanwhile, nano silver particles can promote the bactericidal effect of filter core film；
3, the PVDF composite graphite alkene filter core films first clean modified graphene by dilute hydrochloric acid, dilute salt in forming process
Acid can wash away PVP of the graphene oxide in remaining in graphene oxide grafting PVP systems after being grafted PVP, avoid
PVDF composite membranes, which repeat addition PVP, causes PVP excessive, excessively leads to rupture of membranes so as to avoid foam number；Meanwhile passing through dilute hydrochloric acid
Cleaning, modified graphene have saved the manufacturing time of modified graphene without taking a long time purification；Meanwhile it reacting
Cheng Zhong, since the hygroscopic deliquescence of DMAC can cause system to alkalize, the dilute hydrochloric acid remained in modified graphene can play neutralization
Effect avoids system alkalization from causing PVDF premature cures in standing defoaming process.
Specific implementation mode
The preparation of modified graphene：
1：Graphene oxide is grafted PVP：
(1) 200mL H are measured2O is added graphene oxide 0.1g and obtains the oxidation of a concentration of 0.5mg/mL after ultrasonic disperse
Graphene dispersing solution；
(2) 0.2g PVP are weighed to be added in the graphene oxide dispersion in step (1), is stirred well to and is completely dissolved；
(3) it weighs 0.2g ascorbic acid to be added in step (2), and is stirred well to and is completely dissolved, obtain mixed system；
(4) by 75 DEG C of oil bath heating 4h of mixed system of step (3), graphene oxide grafting PVP solution is obtained；
2：Loading nano silvery particle：
(5) graphene oxide grafting PVP solution is transferred in flask, fills 10min nitrogen, removes the air in flask；
(6) 0.01g nanometers of silver nitrate powders are added into step (5), stir 20min；
(7) under 80 DEG C of heating water baths, brand-new 0.128mol/LNaBH is added dropwise4Aqueous solution；
(8) after by step (7) product by centrifugation, it is modified graphene crude product to take precipitation；
(9) modified graphene crude product is passed through the dilute hydrochloric acid for being 4% with weight fraction to rinse, precipitation is taken to use weight fraction again
It is rinsed for 4% dilute hydrochloric acid, removes PVP extra in modified graphene crude product, be repeated 4 times, after precipitation is dried, you can
To modified graphene.
The weight average molecular weight that the PVDF homopolymers of selection are acquired through rheometer test is between 600,000~650,000.
Glycerol and water in mass ratio 1: 4 are mixed, are added in coagulation tank.
Embodiment one：
Step1. PVDF homopolymers are put into 90 DEG C of drying 3h in drying box；
Step2. by 45 parts of PVDF homopolymers, 75 parts of DMAC, 1.8 parts of PVP-K30,0.2 part of PVP-K90, modified graphene 2.5
In part input reaction kettle, set temperature is 95 DEG C, and spinning solution is made；
Step3. after spinning solution being stood defoaming, tow is made in spinning moulding；
Step4. tow is impregnated after ten minutes in the ethanol solution that mass fraction is 10%, puts into coagulation tank and impregnates 28h,
Obtain the hollow fiber bundle of aperture stabilization；
Step5. to get filter core film after hollow fiber bundle being dried.
Embodiment two：
Step1. PVDF homopolymers are put into 80 DEG C of drying 3h in drying box；
Step2. by 30 parts of PVDF homopolymers, 60 parts of DMAC, 0.9 part of PVP-K30,0.1 part of PVP-K90, modified graphene 0.5
In part input reaction kettle, set temperature is 85 DEG C, and spinning solution is made；
Step3. after spinning solution being stood defoaming, tow is made in spinning moulding；
Step4. tow is impregnated after ten minutes in the ethanol solution that mass fraction is 10%, puts into coagulation tank and impregnates for 24 hours,
Obtain the hollow fiber bundle of aperture stabilization；
Step5. to get filter core film after hollow fiber bundle being dried.
Embodiment three：
Step1. PVDF homopolymers are put into 80~90 DEG C of drying 3h in drying box；
Step2. by 45 parts of PVDF homopolymers, 75 parts of DMAC, 0.9 part of PVP-K30,0.1 part of PVP-K90, modified graphene 2.0
In part input reaction kettle, set temperature is 85 DEG C, and spinning solution is made；
Step3. after spinning solution being stood defoaming, tow is made in spinning moulding；
Step4. tow is impregnated after ten minutes in the ethanol solution that mass fraction is 10%, puts into coagulation tank and impregnates 28h,
Obtain the hollow fiber bundle of aperture stabilization；
Step5. to get filter core film after hollow fiber bundle being dried.
Example IV：
Step1. PVDF homopolymers are put into 85 DEG C of drying 3h in drying box；
Step2. by 45 parts of PVDF homopolymers, 60 parts of DMAC, 1.8 parts of PVP-K30,0.2 part of PVP-K90, modified graphene 1.5
In part input reaction kettle, set temperature is 85 DEG C, and spinning solution is made；
Step3. after spinning solution being stood defoaming, tow is made in spinning moulding；
Step4. tow is impregnated after ten minutes in the ethanol solution that mass fraction is 10%, puts into coagulation tank and impregnates 28h,
Obtain the hollow fiber bundle of aperture stabilization；
Step5. to get filter core film after hollow fiber bundle being dried.
Embodiment five：
Step1. PVDF homopolymers are put into 80~90 DEG C of drying 3h in drying box；
Step2. by 30 parts of PVDF homopolymers, 75 parts of DMAC, 1.8 parts of PVP-K30,0.2 part of PVP-K90, modified graphene 2.0
In part input reaction kettle, set temperature is 90 DEG C, and spinning solution is made；
Step3. after spinning solution being stood defoaming, tow is made in spinning moulding；
Step4. tow is impregnated after ten minutes in the ethanol solution that mass fraction is 10%, puts into coagulation tank and impregnates 28h,
Obtain the hollow fiber bundle of aperture stabilization；
Step5. to get filter core film after hollow fiber bundle being dried.
Embodiment six：
Step1. PVDF homopolymers are put into 90 DEG C of drying 3h in drying box；
Step2. by 35 parts of PVDF homopolymers, 75 parts of DMAC, 0.9 part of PVP-K30,0.1 part of PVP-K90, modified graphene 1.5
In part input reaction kettle, set temperature is 85 DEG C, and spinning solution is made；
Step3. after spinning solution being stood defoaming, tow is made in spinning moulding；
Step4. tow is impregnated after ten minutes in the ethanol solution that mass fraction is 10%, puts into coagulation tank and impregnates 28h,
Obtain the hollow fiber bundle of aperture stabilization；
Step5. to get filter core film after hollow fiber bundle being dried.
Filter core film is made according to above-mentioned six groups of embodiments, and carries out following test：
Average pore size (μm)/maximum diameter of hole (μm)：One section of filter core film of clip, first use absolute ethyl alcohol, after striping is washed with deionized water
The dust on surface, after dehydration completely is dried under vacuum at 60 DEG C, being quenched to break with liquid nitrogen obtains film section, and ion sputtering instrument is used in combination to splash
It penetrates, plates layer of metal film, in clip appropriate length sample, be fixed on sample stage, observed with electron microscope
With take pictures, the hole for compareing on piece measures and counts, and calculates average pore size and maximum diameter of hole；
Contact angle (°)：Water droplet and filter core film film surface contact angle are tested by contact angle tester；
Initial pure water flux (Lm-2·h-1)：Taken out after filter core film is infiltrated 2h in pure water, using nitrogen will be equipped with go from
The membrane flux test equipment of sub- water is compacted 30min, and water is by the infiltration capacity of film in record 1 minute, according to pure water flux=have
Membrane area/time of penetration is imitated, initial pure water flux is calculated；
Resistance tocrocking is tested：
(1) the bovine serum albumin(BSA) stoste for preparing 0.5g/L, the absorbance of stoste is measured with spectrophotometer at 280nm wavelength
Value measures extinction of the permeate at 280nm wavelength after filter core membrane filtration at room temperature by after filter core membrane pressure reality 30min
Angle value calculates bovine serum albumin(BSA) stoste according to rejection=(1- permeate absorbance value/stoste absorbance value) 100%
Rejection；
(2) pure water flux (Lm after cleaning-2·h-1)：It, will by the filter core film of filtration bovine serum albumin(BSA) stoste after over cleaning
Filter core film after cleaning takes out after infiltrating 2h in pure water, using nitrogen by the membrane flux test equipment pressure equipped with deionized water
Real 30min records water in 1 minute and is calculated clear according to pure water flux=effective membrane area/time of penetration by the infiltration capacity of film
Wash rear pure water flux；
Tensile strength (Mpa)：Using universal electrical tensile testing machine detector with mechanical stretching rate 2mm/min to filter core film
Dry film carries out stretching strength determination.
Test result see the table below：
Compare through upper table, selection example five is used as optimum embodiment, carries out the comparative sample of following comparative examples as a comparison.
Comparative example one：
Comparative example one is that modified graphene cleans filter core film obtained without dilute hydrochloric acid in embodiment five.
Comparative example two：
Comparative example two is that PVP selects filter core film made from PVP-K30 in embodiment five.
Comparative example three：
Comparative example three is that PVP selects filter core film made from PVP-K90 in embodiment five.
Comparative example four：
Comparative example four is that PVP selects filter core film made from PVP-K60 in embodiment five.
Comparative example five：
Comparative example five is filter core film made from the non-grafted PVP of modified graphene in embodiment five.
Comparative example six：
Comparative example six is filter core film made from the uncoated nano silver particles of modified graphene in embodiment five.
Comparative example seven：
Comparative example seven is commercially available PVDF filter cores film.
Test method is same as above, and test result see the table below：
By comparative example and embodiment it is found that compared to the filter core film obtained by commercially available and comparative example, made from this formula
The average pore size of PVDF composite graphite alkene filter core films has preferable filtering accuracy at 0.01 μm, by maximum diameter of hole and averagely
The comparison in aperture can speculate that the deviation between the adjacent apertures of the filter core is smaller, and the consistent degree of pore size is high；At contact angle
In within the scope of 25~35 °, pure water flux is in 600Lm-2·h-1More than, there is splendid hydrophily, and pass through bovine serum albumin
The pure water flux that measures again after the rejection test of stoste, finds its fading rate very little, meanwhile, the filter core film also have compared with
Good tensile strength, extends the service life of filter core.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, people in the art
Member can as needed make the present embodiment the modification of not creative contribution after reading this specification, but as long as at this
It is all protected by Patent Law in the right of invention.
Claims (9)
1. a kind of PVDF composite graphites alkene filter core film, which is characterized in that it is composed of the following components that it prepares raw material, each component and its
Mass fraction is as follows：30 ~ 45 parts of PVDF homopolymers, 60 ~ 75 parts of DMAC, 1 ~ 2 part of PVP, 0.5 ~ 2.5 part of modified graphene.
2. PVDF composite graphites alkene filter core film according to claim 1, which is characterized in that the modified graphene is oxidation
Graphene is grafted PVP.
3. PVDF composite graphites alkene filter core film according to claim 2, which is characterized in that the modified graphene is also loaded
There are nano silver particles.
4. PVDF composite graphites alkene filter core film according to claim 1, which is characterized in that the weight of the PVDF homopolymers is equal
Molecular weight is 600,000 ~ 650,000.
5. PVDF composite graphites alkene filter core film according to claim 1, which is characterized in that the PVP by PVP-K30 and
PVP-K90 in mass ratio 9:1 is blended.
6. according to a kind of production technology of PVDF composite graphites alkene filter core film any one of described in claim 1-5, feature exists
In including following steps：
Step1. by PVDF homopolymers, DMAC, PVP, modified graphene input reaction kettle, set temperature is 85 ~ 95 DEG C, is made
Spinning solution；
Step2. after spinning solution being stood defoaming, tow is made in spinning moulding；
Step3. by tow mass fraction be 10% ethanol solution in impregnate after ten minutes, put into coagulation tank in impregnate 24 ~
28h obtains the hollow fiber bundle of aperture stabilization；
Step4. to get filter core film after hollow fiber bundle being dried.
7. the production technology of PVDF composite graphites alkene filter core film according to claim 6, which is characterized in that the modified stone
The dilute hydrochloric acid that black alkene is 4% through mass fraction before putting into reaction kettle washs 4 ~ 5 times.
8. the production technology of PVDF composite graphites alkene filter core film according to claim 6, which is characterized in that the PVDF is equal
Polymers dries 3h before preparing input reaction kettle at 80 ~ 90 DEG C.
9. the production technology of PVDF composite graphites alkene filter core film according to claim 6, which is characterized in that the coagulation tank
Interior to be added with water and glycerine, the mass ratio of the water and glycerine is 4:1.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110038454A (en) * | 2019-04-25 | 2019-07-23 | 浙江大学 | A kind of high-intensitive, high modified PVDF supermicro filtration membrane of water flux graphene and preparation method thereof |
| CN110280142A (en) * | 2019-06-24 | 2019-09-27 | 南京龙源环保有限公司 | Silver-colored graphene oxide polyvinylidene fluoride hollow fiber ultrafiltration membrane of a kind of load and preparation method thereof |
| CN112626711A (en) * | 2020-11-16 | 2021-04-09 | 广西中科鼎新产业技术研究院有限公司 | Hydrophilic nanofiber membrane and preparation method thereof |
| CN113813799A (en) * | 2021-09-13 | 2021-12-21 | 上海海若环境集团有限公司 | Preparation method of PVDF ultrafiltration membrane with polyester lining |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102688707A (en) * | 2012-05-23 | 2012-09-26 | 哈尔滨工业大学 | Preparation method for graphene oxide/polyvinylidene fluoride composite ultrafiltration membrane |
| CN104353366A (en) * | 2014-11-10 | 2015-02-18 | 东华大学 | Polymer film with antifouling and anti-bacterial functions and preparation method of polymer film |
-
2017
- 2017-02-24 CN CN201710105990.9A patent/CN108499374B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102688707A (en) * | 2012-05-23 | 2012-09-26 | 哈尔滨工业大学 | Preparation method for graphene oxide/polyvinylidene fluoride composite ultrafiltration membrane |
| CN104353366A (en) * | 2014-11-10 | 2015-02-18 | 东华大学 | Polymer film with antifouling and anti-bacterial functions and preparation method of polymer film |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110038454A (en) * | 2019-04-25 | 2019-07-23 | 浙江大学 | A kind of high-intensitive, high modified PVDF supermicro filtration membrane of water flux graphene and preparation method thereof |
| CN110038454B (en) * | 2019-04-25 | 2020-12-04 | 浙江大学 | High-strength and high-water-flux graphene modified PVDF (polyvinylidene fluoride) ultra-micro filter membrane and preparation method thereof |
| CN110280142A (en) * | 2019-06-24 | 2019-09-27 | 南京龙源环保有限公司 | Silver-colored graphene oxide polyvinylidene fluoride hollow fiber ultrafiltration membrane of a kind of load and preparation method thereof |
| CN112626711A (en) * | 2020-11-16 | 2021-04-09 | 广西中科鼎新产业技术研究院有限公司 | Hydrophilic nanofiber membrane and preparation method thereof |
| CN113813799A (en) * | 2021-09-13 | 2021-12-21 | 上海海若环境集团有限公司 | Preparation method of PVDF ultrafiltration membrane with polyester lining |
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