CN102166485A - Modified polyvinylidene fluoride (PVDF) hollow fibrous membrane and preparation method thereof - Google Patents
Modified polyvinylidene fluoride (PVDF) hollow fibrous membrane and preparation method thereof Download PDFInfo
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- CN102166485A CN102166485A CN2011101391808A CN201110139180A CN102166485A CN 102166485 A CN102166485 A CN 102166485A CN 2011101391808 A CN2011101391808 A CN 2011101391808A CN 201110139180 A CN201110139180 A CN 201110139180A CN 102166485 A CN102166485 A CN 102166485A
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- 239000012528 membrane Substances 0.000 title claims abstract description 135
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 229920002981 polyvinylidene fluoride Polymers 0.000 title abstract description 15
- 239000002033 PVDF binder Substances 0.000 title abstract 12
- 230000004048 modification Effects 0.000 claims abstract description 36
- 238000012986 modification Methods 0.000 claims abstract description 36
- 229910010413 TiO 2 Inorganic materials 0.000 claims abstract description 21
- 239000002105 nanoparticle Substances 0.000 claims abstract description 17
- 239000012510 hollow fiber Substances 0.000 claims abstract description 12
- 238000001471 micro-filtration Methods 0.000 claims abstract description 7
- 235000012489 doughnuts Nutrition 0.000 claims description 37
- 239000000835 fiber Substances 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 21
- 238000001914 filtration Methods 0.000 claims description 13
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 235000011187 glycerol Nutrition 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 5
- 238000004886 process control Methods 0.000 claims 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 6
- 230000000704 physical effect Effects 0.000 abstract description 3
- 238000009285 membrane fouling Methods 0.000 abstract 1
- 230000007774 longterm Effects 0.000 description 9
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 8
- 230000000630 rising effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000003373 anti-fouling effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000011109 contamination Methods 0.000 description 3
- 230000002427 irreversible effect Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 238000010612 desalination reaction Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000010148 water-pollination Effects 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007306 functionalization reaction Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Abstract
本发明公开了一种改性聚偏氟乙烯（PVDF）中空纤维膜及其制备方法。所述的改性聚偏氟乙烯（PVDF）中空纤维膜，包括聚偏氟乙烯（PVDF）中空纤维式微滤膜及其表面上的一层新的动态次生TiO2纳米粒子预膜层。其制备方法包括PVDF中空纤维式微滤膜预处理、TiO2动态改性膜制备两个步骤。本发明由于采用TiO2纳米颗粒通过物理作用将其涂敷于PVDF中空纤维式微滤膜表面进行动态膜改性，从而改善PVDF中空纤维式微滤膜的亲水性和抗污染能力，在膜生物反应器中使用该动态膜，结果表明该动态膜具有更低的膜污染增长速率。且本发明的改性PVDF中空纤维膜的制备方法是一种简易有效和实用的膜改性制备方法。
The invention discloses a modified polyvinylidene fluoride (PVDF) hollow fiber membrane and a preparation method thereof. The modified polyvinylidene fluoride (PVDF) hollow fiber membrane includes a polyvinylidene fluoride (PVDF) hollow fiber microfiltration membrane and a new dynamic secondary TiO 2 nano particle pre-membrane layer on the surface. The preparation method comprises two steps of PVDF hollow fiber microfiltration membrane pretreatment and TiO2 dynamic modification membrane preparation. In the present invention, TiO2 nanoparticles are applied to the surface of the PVDF hollow fiber microfiltration membrane through physical action for dynamic membrane modification, thereby improving the hydrophilicity and anti-pollution ability of the PVDF hollow fiber microfiltration membrane, and improving the performance of membrane bioreactions. The dynamic membrane is used in the device, and the results show that the dynamic membrane has a lower growth rate of membrane fouling. And the preparation method of the modified PVDF hollow fiber membrane of the present invention is a simple, effective and practical membrane modification preparation method.
Description
Technical field
The present invention relates to a kind of modified polyvinilidene fluoride (PVDF) hollow-fibre membrane and preparation method thereof.Promptly utilize nano particle titanium dioxide (TiO
2) be coated on Kynoar (PVDF) hollow-fibre membrane surface and form a kind of novel antifilm contaminative dynamic modification film.
Background technology
Membrane technology is as a kind of emerging isolation technics, in sewage disposal and middle water reuse process, more and more be subject to people's attention [Xu Zhenliang. embrane method water technology [M]. Beijing: Chemical Industry Press, 2001].Kynoar (PVDF) has advantages such as excellent chemical stability, heat endurance, mechanical stability, is a kind of good new polymers membrane material, has received increasing attention in membrane separation technique in recent years.But have extremely strong hydrophobicity, easily pollute, be difficult to shortcomings such as functionalization by the film that it is made, these drawbacks limit the range of application of pvdf membrane.
For overcoming the above problems, carried out many-sided research both at home and abroad, Dynamic Membrane (Dynamic membrane) technology is wherein more characteristic and a kind of preferably method of effect.Dynamic Membrane is meant by precoating paint or activated sludge and is also referred to as secondary film (Second membrane) at the new film that the film surface forms.There are some researches show that the permeance property of Dynamic Membrane is better, contamination resistance significantly improves, but since the particle that adopts bigger, generally greater than 1000nm, thereby cause the pvdf membrane of modification to have instability problem.Therefore Dynamic Membrane receives domestic and international water technology researcher's concern just more and more as a novel special film isolation technics.But the research of Dynamic Membrane still is in the starting stage, and novel, simple, practical, stable Dynamic Membrane manufacturing technology will certainly be used for the membrane technology heavy industrialization effective way is provided.
1.?Li?Na,?Liu?Zhongzhou,?Xu?Shuguang.?Dynamically?formed?poly?(vinyl?alcohol)?ultrafiltration?membrane?with?good?anti-fouling?characteristics[J].?J?Membr?Sci,?2000,?169(1):?17-28．
2. open and defend the people, Qiao Sen, leafiness. precoated dynamic membrane-bioreactor for treatment of sanitary sewage experimental study [J]. ACTA Scientiae Circumstantiae, 2002,25 (2): 249-253.
3.?Knyazkova,?Kavitskaya?AA. ?Improved?performance?of?reverse?osmosis?with?dynmnic?layers?onto?membranes?inseparation?of?concen
4. Li Jun, Xi Danli, stone is brave. and resistance distributed and pollution mechanism [J] when Dynamic Membrane was disposed of sewage. chemical industry journal, 2008,59 (9): 2310-2315.
5.?Cat?B,?Ye?H,?Yu?I.?Preparation?and?separation?performance?of?a?dynamically?formed?MnO
2?membrane[J].?Desalination,?2000,?128:?247-256.
6.?Noor?M,?Ahmadun?F,?Mohamed?T.?Performance?of?flexible?membrane?using?kaolin?dynamic?membrane?in?treating?domestic?wastewater[J].Desalination,?2002,?147:?263-268.
7. Zhuo Lin cloud, Li Jun, Chen Jihua etc. the preparation of kaolin Dynamic Membrane [J]. membrane science and technology, 2006,26 (3): 37-40.].
Summary of the invention
The present invention provides a kind of modified polyvinilidene fluoride (PVDF) hollow-fibre membrane and preparation method thereof in order to solve above-mentioned Dynamic Membrane problem of unstable.
Technical scheme of the present invention
The preparation method of a kind of modified polyvinilidene fluoride (PVDF) hollow-fibre membrane promptly adopts titanium dioxide (TiO
2) nano particle is coated on Kynoar (PVDF) hollow fiber microfiltration membrane surface by physical action with it, thereby form the new dynamic secondary pre-rete of one deck, reach the hydrophily of improving film, delay the effect that film pollutes, described preparation method specifically may further comprise the steps:
(1), the PVDF doughnut filter membrane preliminary treatment that declines
The PVDF doughnut filter membrane that declines is made assembly, membrane module is put into deionized water soak, the glycerine on flush away film surface, stand-by behind precompressed 1～1.5h under 20～30 ℃ of temperature and the pressure 0.05～0.5MPa;
The decline aperture of filter membrane of described PVDF doughnut is 0.05～0.2 μ m;
(2), TiO
2The dynamic modification film preparation
The doughnut that step (1) preliminary treatment is finished declines, and to place concentration be 0.1～1.0% TiO to filter membrane component
2In the water slurry of nano particle, earlier handle 2～15min through room temperature ultrasonic, in air, leave standstill then, to be dried after, carry out press filtration 1～5h, the pressure-filtering process controlled pressure is 0.05 ~ 0.5MPa, to form irreversible dynamic sedimentary deposit;
Described TiO
2Nano particle average grain diameter 10～200nm;
After press filtration is intact, the PVDF doughnut filter membrane component that declines is taken out, place earlier and be put in again behind the air after clear water soaks 1h, at room temperature return and wash 10～50min with clear water, the backwash process controlled pressure is 0.05 ~ 0.1MPa, with the particle of reversible adsorption in easily the come off particle and the fenestra on flush away surface, final a kind of modified polyvinilidene fluoride of the present invention (PVDF) hollow-fibre membrane that gets.
Beneficial effect of the present invention
A kind of modified polyvinilidene fluoride of the present invention (PVDF) hollow-fibre membrane is owing to adopted TiO
2Nano particle is coated on the PVDF doughnut filter membrane surface that declines by physical action with it and carries out the Dynamic Membrane modification, thereby improves PVDF doughnut the decline hydrophily and the contamination resistance of filter membrane, and its flux returns to initial flux more than 95%.It uses this Dynamic Membrane in membrane bioreactor (MBR), the result shows that this Dynamic Membrane has lower film and pollutes rate of rise.
Description of drawings
The decline SEM figure on filter membrane surface of Fig. 1 a, embodiment 1 unmodified PVDF doughnut
The SEM figure on Kynoar (PVDF) the hollow-fibre membrane surface of Fig. 1 b, embodiment 1 modification
Kynoar (PVDF) the hollow-fibre membrane section SEM figure of Fig. 2, embodiment 1 modification
The TMP of Kynoar (PVDF) hollow-fibre membrane before and after Fig. 3, embodiment 1 modification changes
Kynoar (PVDF) hollow-fibre membrane before and after Fig. 4, embodiment 1 modification is striden the variation of the clearance of film TOC
Kynoar (PVDF) the hollow-fibre membrane surface TiO of Fig. 5 a, embodiment 3 modifications
2The sedimentary deposit pattern
The film surface TiO of Kynoar (PVDF) hollow-fibre membrane of Fig. 5 b, embodiment 3 modifications after MBR medium-term and long-term operation back and cleaning
2The sedimentary deposit pattern.
The specific embodiment
Also in conjunction with the accompanying drawings the present invention is further set forth below by embodiment, but do not limit the present invention.
The used MBR of the present invention can adopt as company of Japanese Asahi Chemical Industry, AM General company, Shandong Zhaojin Motian Co., Ltd, Yantai Jin Hong filter film technology Co., Ltd, your Co., Ltd of Beijing Kemp etc.But used membrane bioreactor (MBR) film is an immersion pvdf membrane SVM series in the embodiments of the invention, and manufacturer is Beijing Kemp that Co., Ltd;
Used aperture is Kynoar (PVDF) doughnut of 0.05～0.2 μ m filter membrane that declines in the embodiments of the invention, and manufacturer is your Co., Ltd of Beijing Kemp.
The TiO that embodiments of the invention are used
2Nano particle, specification are average grain diameter 50nm, 100nm and 200nm, Huaming High Technology (Group) Co., Ltd., Shanghai of manufacturer.
At moving among the input of Kynoar (PVDF) the hollow fiber microfiltration membrane assembly before and after the modification of the present invention MBR, investigate the characteristic of its filter activity mud, and, determine the contamination resistance of dynamic modification film by long term monitoring to transmembrane pressure (TMP) rising speed.
Embodiment 1
The preparation method of a kind of modified polyvinilidene fluoride (PVDF) hollow-fibre membrane comprises the steps:
(1), the PVDF doughnut filter membrane preliminary treatment that declines
The PVDF doughnut of the membrane aperture 0.05 μ m filter membrane that declines is made the MBR assembly, then membrane module is put into deionized water and soak, the glycerine on flush away film surface, stand-by behind precompressed 1h under 20 ℃ of temperature and the pressure 0.1MPa;
Fig. 1 a is the SEM figure on the filter membrane surface that declines through pretreated unmodified PVDF doughnut;
(2), TiO
2The dynamic modification film preparation
The doughnut that preliminary treatment is finished declines, and to place nano particle average grain diameter 50nm, concentration be 0.1% TiO to filter membrane component
2Water slurry in earlier handle 2min through room temperature ultrasonic, after in air, leaving standstill then, treating air dry, carry out press filtration, the pressure-filtering process controlled pressure is 0.05MPa, after the time is 5.0h; The doughnut filter membrane membrane module that declines is taken out, places air earlier, after be put in again soak 1h in the clear water after, the filter membrane modification operation that declines of PVDF doughnut is finished; Return through clear water and wash 50min, returning and washing pressure is 0.05MPa, promptly gets a kind of modified polyvinilidene fluoride of the present invention (PVDF) hollow-fibre membrane.
Fig. 1 b is the SEM figure of PVDF hollow-fibre membrane of the modification of above-mentioned gained;
Tangible nano particle TiO is arranged the PVDF hollow-fibre membrane surface of modification as can be seen from the contrast of Fig. 1 a and Fig. 1 b
2Exist.
Fig. 2 is the PVDF doughnut of the modification of the above-mentioned gained filter membrane section SEM figure that declines, and as can be seen from Figure 2 there is tangible nano particle TiO on the PVDF doughnut of the modification filter membrane surface that declines
2Exist.
A kind of modified polyvinilidene fluoride (PVDF) doughnut of above-mentioned gained filter membrane that declines is applied to carry out among the MBR antifouling property and investigates:
PVDF doughnut before and after the modification of the above-mentioned gained filter membrane that declines is dropped into the MBR operation, investigate the characteristic of its filter activity mud,, find along with filtration time prolongs TiO by long term monitoring to TMP rising speed
2Dynamic Membrane TMP rising speed has obviously reduced by 59.5%, specifically as shown in Figure 3.This also further illustrates TiO
2Dynamic Membrane delay that film pollutes and antipollution aspect have certain advantage.
PVDF doughnut after the modification filter membrane that declines is applied under more than 50 day the situation of the medium-term and long-term operation continuously of MBR, and its TOC clearance remains unchanged substantially in the process, and average removal rate is 95%, as shown in Figure 4.
Embodiment 2
The preparation method of a kind of modified polyvinilidene fluoride (PVDF) hollow-fibre membrane comprises the steps:
(1) the PVDF doughnut filter membrane preliminary treatment that declines
The PVDF doughnut of the membrane aperture 0.10 μ m filter membrane that declines is made the MBR assembly, membrane module is put into deionized water soak, the glycerine on flush away film surface, stand-by behind precompressed 1.5h under 25 ℃ of temperature and the pressure 0.05MPa;
(2) TiO
2The dynamic modification film preparation
The doughnut that preliminary treatment the is finished filter membrane component that declines places 1.0% TiO
2(TiO
2Nano particle average grain diameter 100nm) in the water slurry earlier through ultrasonic 10min, in air, leave standstill then, to be dried after, carry out press filtration, the pressure-filtering process controlled pressure is 0.50Mpa, the time is 1.0h, to form irreversible dynamic sedimentary deposit;
The doughnut filter membrane membrane module that declines is taken out, places air earlier, after be put in again soak 1h in the clear water after, pre-membrane operations is finished;
Return through clear water and wash 10min, returning and washing pressure is 0.05MPa, final a kind of modified polyvinilidene fluoride of the present invention (PVDF) hollow-fibre membrane that gets.
A kind of modified polyvinilidene fluoride (PVDF) hollow-fibre membrane of above-mentioned gained is applied to antifouling property investigation among the MBR:
Hollow fiber film assembly before and after the modification is dropped into the MBR operation, investigates the characteristic of its filter activity mud,, find along with filtration time prolongs by long term monitoring to TMP rising speed, with film before the modification relatively, TiO
2Dynamic Membrane TMP rising speed has reduced by 55.8%.This also further illustrates TiO
2Dynamic Membrane delay that film pollutes and antipollution aspect have certain advantage.
PVDF doughnut after the modification filter membrane that declines is applied under 50 days the situation of the medium-term and long-term operation continuously of MBR, and its TOC clearance remains unchanged substantially in the process, and average removal rate is 94.6%.
Embodiment 3
The preparation method of a kind of modified polyvinilidene fluoride (PVDF) hollow-fibre membrane comprises the steps:
(1), the PVDF doughnut filter membrane preliminary treatment that declines
The PVDF doughnut of the membrane aperture 0.2 μ m filter membrane that declines is made the MBR assembly, membrane module is put into deionized water soak, the decline glycerine on filter membrane surface of flush away doughnut, stand-by behind precompressed 1.0h under 30 ° of C of temperature and the pressure 0.5MPa;
(2) TiO
2The dynamic modification film preparation
The doughnut that preliminary treatment the is finished filter membrane component that declines places 0.8% TiO
2(TiO
2Nano particle average grain diameter 200nm) in the water slurry earlier through ultrasonic 15min, in air, leave standstill then, to be dried after, controlled pressure is 0.20Mpa, press filtration 4h is to form irreversible dynamic sedimentary deposit;
The doughnut filter membrane membrane module that declines is taken out, places air earlier, after be put in again soak 1h in the clear water after, pre-membrane operations is finished; Return through 40min with clear water and wash, returning and washing pressure is 0.1MPa, final a kind of modified polyvinilidene fluoride of the present invention (PVDF) hollow-fibre membrane that gets.
A kind of modified polyvinilidene fluoride (PVDF) hollow-fibre membrane of above-mentioned gained is applied to carry out among the MBR antifouling property investigation:
Hollow fiber film assembly before and after the modification dropped among the MBR moves, investigate the characteristic of its filter activity mud,, find along with filtration time prolongs by long term monitoring to TMP rising speed, with film before the modification relatively, TiO
2Dynamic Membrane TMP rising speed has reduced by 50.8%.This also further illustrates TiO
2Dynamic Membrane delay that film pollutes and antipollution aspect have certain advantage.PVDF hollow-fibre membrane after the modification is applied under 50 days the situation of the medium-term and long-term operation continuously of MBR, and its TOC clearance remains unchanged substantially, and average removal rate is 92%.
For the PVDF hollow-fibre membrane after the modification, after long-term operation continuously in 2 months, return and wash and after clorox cleans, by electron microscopic observation doughnut formula film film surface TiO
2Layer outward appearance shown in accompanying drawing 5a, 5b, from Fig. 5 a, 5b contrast as can be seen, do not have significant change, shows this TiO
2Pre-rete has certain stability, thereby thinks that it is feasible that the resistant to pollution PVDF hollow-fibre membrane of a kind of dynamic modification of the present invention is applied to MBR.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, without departing from the inventive concept of the premise; can also make some improvements and modifications, these improvements and modifications also should be considered within the scope of protection of the present invention.
Claims (5)
1. a modified polyvinilidene fluoride (PVDF) hollow-fibre membrane comprises Kynoar (PVDF) hollow-fibre membrane, it is characterized in that there is the new dynamic secondary TiO of one deck on the decline surface of filter membrane of Kynoar (PVDF) doughnut
2The pre-rete of nano particle.
2. a kind of modified polyvinilidene fluoride as claimed in claim 1 (PVDF) hollow-fibre membrane is characterized in that the decline aperture of filter membrane of described Kynoar (PVDF) doughnut is 0.05～0.2 μ m.
3. a kind of modified polyvinilidene fluoride as claimed in claim 1 (PVDF) hollow-fibre membrane is characterized in that described TiO
2TiO in the pre-rete of nano particle
2The average grain diameter of nano particle is 10～200nm.
4. as the described a kind of modified polyvinilidene fluoride of the arbitrary claim of claim 1～3 (PVDF) hollow-fibre membrane, it is characterized in that may further comprise the steps:
(1), the PVDF doughnut filter membrane preliminary treatment that declines
The PVDF doughnut filter membrane that declines is made assembly, the hollow fiber microfiltration membrane assembly is put into deionized water soak, the glycerine on flush away film surface, stand-by behind precompressed 1～1.5h under 20～30 ℃ of temperature and the pressure 0.05～0.5MPa;
(2), TiO
2The dynamic modification film preparation
The PVDF doughnut that step (1) preliminary treatment the is finished filter membrane component that declines places 0.1～1.0% TiO
2In the water slurry of nano particle, first ultrasonic wave is handled 2～15min under the room temperature, in air, leave standstill then, to be dried after, carry out press filtration, process control pressure is 0.05 ~ 0.5Mpa, the time is 1～5h;
After press filtration is intact, the PVDF doughnut filter membrane component that declines is taken out, place earlier and be put in again behind the air after clear water soaks 1h, room temperature is returned with clear water and is washed 10～50min, the backwash process controlled pressure is 0.05 ~ 0.1MPa, final a kind of modified polyvinilidene fluoride of the present invention (PVDF) hollow-fibre membrane that gets.
5. as the application of the described a kind of modified polyvinilidene fluoride of the arbitrary claim of claim 1～3 (PVDF) hollow-fibre membrane in membrane bioreactor.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104230056A (en) * | 2014-09-21 | 2014-12-24 | 北京工业大学 | Method for relieving pollution to ultrafiltration membrane under joint action of pre-oxidation and membrane modification |
| CN106178974A (en) * | 2016-08-23 | 2016-12-07 | 北京碧水源膜科技有限公司 | A kind of nano modification enhancement type hollow fiber film and preparation method thereof |
| CN106807248A (en) * | 2017-03-23 | 2017-06-09 | 长江大学 | A kind of antipollution hollow-fibre membrane and its manufacture method |
| CN111495205A (en) * | 2020-04-26 | 2020-08-07 | 北京水研环境科技股份有限公司 | Preparation method of self-cleaning and bacteriostatic hollow fiber membrane |
| CN112023724A (en) * | 2020-08-25 | 2020-12-04 | 广州大学 | A kind of modified polyvinylidene fluoride ultrafiltration membrane and preparation method thereof |
| CN112960858A (en) * | 2021-02-18 | 2021-06-15 | 杭州楠大环保科技有限公司 | Sewage treatment process based on hollow fiber membrane |
| WO2022109865A1 (en) * | 2020-11-25 | 2022-06-02 | 扬州实略信息科技有限公司 | Wastewater deep treater |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100189940A1 (en) * | 2006-08-25 | 2010-07-29 | Sachtleben Chemie Gmbh | Titanium dioxide-containing composite |
| CN101837248A (en) * | 2010-06-24 | 2010-09-22 | 厦门绿邦膜技术有限公司 | Production method of cellosilk enhanced compound hollow fiber membrane |
| CN101954248A (en) * | 2010-06-22 | 2011-01-26 | 赵岳轩 | Polyvinylidene fluoride hollow fiber membrane and preparation method thereof |
-
2011
- 2011-05-27 CN CN2011101391808A patent/CN102166485A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100189940A1 (en) * | 2006-08-25 | 2010-07-29 | Sachtleben Chemie Gmbh | Titanium dioxide-containing composite |
| CN101954248A (en) * | 2010-06-22 | 2011-01-26 | 赵岳轩 | Polyvinylidene fluoride hollow fiber membrane and preparation method thereof |
| CN101837248A (en) * | 2010-06-24 | 2010-09-22 | 厦门绿邦膜技术有限公司 | Production method of cellosilk enhanced compound hollow fiber membrane |
Non-Patent Citations (1)
| Title |
|---|
| 陈桂娥等: "TiO2动态改性膜应用于MBR的研究", 《膜科学与技术》, vol. 29, no. 6, 31 December 2009 (2009-12-31), pages 32 - 33 * |
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