CN105126644B - Preparation method for polypropylene hollow fiber ultrafiltration membrane coated with high-molecular composite coating - Google Patents
Preparation method for polypropylene hollow fiber ultrafiltration membrane coated with high-molecular composite coating Download PDFInfo
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- CN105126644B CN105126644B CN201510511631.4A CN201510511631A CN105126644B CN 105126644 B CN105126644 B CN 105126644B CN 201510511631 A CN201510511631 A CN 201510511631A CN 105126644 B CN105126644 B CN 105126644B
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Abstract
The invention relates to a preparation method for a polypropylene hollow fiber ultrafiltration membrane coated with a high-molecular composite coating. The membrane comprises a water inlet surface and a water outlet surface which are respectively coated with a coating; the coating coating the water inlet surface comprises the following raw materials: tritolyl phosphate, dioctyl phthalate, a modified polysiloxane polymer, polyetheretherketone PEEK, urotropine and the like; and the coating coating the water outlet surface comprises the following raw materials: polyalkyl glycol allyl epoxyl ethers, pentaerythritol, polyethylene glycol dilaurate, polyoxyethylated alkylamine, nanometer silver and the like. By using the prepared polypropylene hollow fiber ultrafiltration membrane, the retention rate of macro-molecule organics and emulsified oil is raised, the sewage COD removal rate is substantially improved, the electrostatic action on the membrane surface is changed, adsorption of the membrane surface on pollutants is prevented, the membrane can be continuously used for a long time under a high membrane flux condition, and is prolonged in service life. Addition of nanometer silver helps to effectively improve the bacteria and mildew resisting performance of the membrane.
Description
Technical field
The present invention relates to a kind of preparation method of the polypropylene hollow fiber ultrafilter membrane of coating high polymer composite coating, belongs to
Water treatment field.
Background technology
Membrane separation technique is a kind of isolation technics for being widely used in solution or gaseous matter separation, concentration and purifying.Film
Wall micropore gathers, and stock solution passes through membranous wall for filter liquor by the side of film, solvent and small molecule solute under a certain pressure, and big
Molecule solute is rejected by, and reaches the purpose that material is separated and concentrated.Membrane separating process be dynamic filtration process, macromole solute
Intercepted by membranous wall, flowed out with concentrated solution, can continuous life-time service.Filter process can run under room temperature, low pressure, become without phase
Change, it is energy-efficient.
Polypropylene hollow fiber ultrafilter membrane is one kind of ultrafilter membrane.Doughnut external diameter:450-460 μm, internal diameter:350-
360 μm, 50 μm of thickness of pipe wall is the hot phase stretched film of category.Molecular cut off 5-10 ten thousand.Raw water is on the outside of doughnut or inner chamber pressurizes
Flowing, respectively constitutes external-compression type and inner pressed.Ultrafiltration is dynamic filtration process, and being trapped material can exclude with concentration, pollution resistance
It is medium, can continuously run for a long time.It is net that polypropylene hollow fiber hyperfiltration technique is mainly used in mineral spring Water warfare, productive life water
The medicine such as pollution industry water process and recovery, urban sewage recycling, the changes such as change, medical purification, concentration of juices, papermaking plating chemical industry
The industries such as work, building, weaving, papermaking, petrochemical industry.
But existing polypropylene hollow fiber ultrafilter membrane is primarily present following shortcoming：
1st, during raw water is separated, surface can deposit a large amount of impurity and granule, and with the accumulation of impurity particle, film has
Effect area is tapered into, and membrane flux is reduced, and filter efficiency is deteriorated；
2nd, resistance to acids and bases is poor, Antimicrobial preservative poor performance；
3rd, traditional polypropylene hollow fiber ultrafilter membrane cleaning method is that, using gas or liquid backwash, so operation is needed
External equipment is introduced, and filter process must stop, and improve operating cost, and easily cause the damage of film.
The content of the invention
It is an object of the invention to overcome the drawbacks described above that prior art is present, there is provided one kind coating high polymer composite coating
Polypropylene hollow fiber ultrafilter membrane preparation method, polypropylene hollow fiber ultrafilter membrane includes upstream face and going out the water surface, entering
The water surface and go out the water surface and be respectively coated with coating；Possesses preparation process as follows：
（1）Evacuation process is carried out to polypropylene hollow fiber ultrafilter membrane with vaccum-pumping equipment；
（2）By step（1）The polypropylene hollow fiber ultrafilter membrane that evacuation was processed is put in coating container, by upstream face
In coated coating injection coating container, the upstream face of polypropylene hollow fiber ultrafilter membrane is coated under evacuation environment；
（3）After the completion of coating, by remaining upstream face coated coating emptying in coating container；
（4）With vaccum-pumping equipment to step（2）The polypropylene hollow fiber ultrafilter membrane for processing carries out evacuation process；
（5）Will be to step（4）The polypropylene hollow fiber ultrafilter membrane that evacuation was processed is put in coating container, by water outlet
In top coat injection coating container, the water surface that goes out of polypropylene hollow fiber ultrafilter membrane is applied under evacuation environment
Cover；
The upstream face coated coating is made up of the raw material of following parts by weight：
Tricresyl phosphate 12-30
Dioctyl phthalate 16-18
Modified polyorganosiloxane polymer 8-12
Polyether-ether-ketone PEEK 6-7
Hexamethylenamine 2-3
Coalescents 2-5
Ammonium molybdate 7-9
Polyethylene Glycol about 40-50；
The water outlet top coat is made up of the raw material of following parts by weight：
Pi-allyl polyoxy alkyl epoxy base ether 16-19
Tetramethylolmethane 15-20
Polyethylene Glycol Laurel acid diester 27-30
The dilute alkylamine 1-2 of polyoxyethylene
Nanometer silver 3-5
N-[2-(2-methyl-4-oxopentyl) 1-2.5
Methyl tetrahydro phthalic anhydride 2-4.
The thickness of the coating of the upstream face coating is 80-200nm.
It is described go out the water surface coating coating thickness be 50-150nm.
Wherein, step（1）With（4）In pumpdown time be 20-40 minutes.
Wherein, step（1）、（2）、（4）With（5）In vacuum be -0.1MPa.
The present invention has advantages below：
(1) tricresyl phosphate, dioctyl phthalate, modified polyorganosiloxane polymer, polyether-ether-ketone PEEK this four
Plant material compounding and produce synergism, improve film to larger molecular organicses and the rejection of oil emulsion, the COD for making sewage goes
Except rate is greatly improved.
(2) hexamethylenamine, ammonium molybdate, tetramethylolmethane change the electrostatic interaction on film surface, prevent film surface to pollution
The absorption of thing.
(3) addition of nanometer silver makes film surface have the effect of sterilization, and the antibacterial that can effectively improve film is gone mouldy performance.
(4) by pi-allyl polyoxy alkyl epoxy base ether, Polyethylene Glycol Laurel acid diester being introduced in outer investment precoat, being gathered
The dilute alkylamine of oxidation second, N-[2-(2-methyl-4-oxopentyl), methyl tetrahydro phthalic anhydride, improve film strength, resistance to acids and bases, can make film in height
Long-time is continuously used under conditions of membrane flux, extends the service life of film.
Specific embodiment
Embodiment 1：
A kind of preparation method of the polypropylene hollow fiber ultrafilter membrane of coating high polymer composite coating, polypropylene hollow fiber
Ultrafilter membrane includes upstream face and going out the water surface, in upstream face and goes out the water surface and is respectively coated with coating；Possesses preparation process as follows：
（1）Evacuation process is carried out to polypropylene hollow fiber ultrafilter membrane with vaccum-pumping equipment, the pumpdown time is 20 points
Clock；
（2）By step（1）The polypropylene hollow fiber ultrafilter membrane that evacuation was processed is put in coating container, by upstream face
In coated coating injection coating container, the upstream face of polypropylene hollow fiber ultrafilter membrane is coated under evacuation environment；
（3）After the completion of coating, by remaining upstream face coated coating emptying in coating container；
（4）With vaccum-pumping equipment to step（2）The polypropylene hollow fiber ultrafilter membrane for processing carries out evacuation process, takes out
Vacuum time is 20 minutes；
（5）Will be to step（4）The polypropylene hollow fiber ultrafilter membrane that evacuation was processed is put in coating container, by water outlet
In top coat injection coating container, the water surface that goes out of polypropylene hollow fiber ultrafilter membrane is applied under evacuation environment
Cover；
Wherein, step（1）、（2）、（4）With（5）In vacuum be -0.1MPa.
The coating of the upstream face coating is made up of the raw material of following parts by weight：
Tricresyl phosphate 12
Dioctyl phthalate 16
Modified polyorganosiloxane polymer 8
Polyether-ether-ketone PEEK 6
Hexamethylenamine 2
Coalescents 2
Ammonium molybdate 7
Polyethylene Glycol 40；
The thickness of the coating of the upstream face coating is about 80nm.
It is described go out the water surface coating coating be made up of the raw material of following parts by weight：
Pi-allyl polyoxy alkyl epoxy base ether 16
Tetramethylolmethane 15
Polyethylene Glycol Laurel acid diester 27
The dilute alkylamine 1 of polyoxyethylene
Nanometer silver 3
N-[2-(2-methyl-4-oxopentyl) 1
Methyl tetrahydro phthalic anhydride 2.
It is described go out water surface coating the thickness of coating be about 50nm.
The polypropylene hollow fiber membrane of above-mentioned coating high polymer composite coating is applied to into the process of certain waste water in pharmaceutical plants, Jing
After pretreatment, the COD for entering water is 2600-6200mg/L, and the COD of water outlet is 150-310 mg/L, and clearance is 94.3-95%, place
Reason amount is 2000L/d, and membrane flux during operation can averagely reach 10L/（m2.h）
Embodiment 2：
A kind of preparation method of the polypropylene hollow fiber ultrafilter membrane of coating high polymer composite coating, polypropylene hollow fiber
Ultrafilter membrane includes upstream face and going out the water surface, in upstream face and goes out the water surface and is respectively coated with coating；Possesses preparation process as follows：
（1）Evacuation process is carried out to polypropylene hollow fiber ultrafilter membrane with vaccum-pumping equipment, the pumpdown time is 40 points
Clock；
（2）By step（1）The polypropylene hollow fiber ultrafilter membrane that evacuation was processed is put in coating container, by upstream face
In coated coating injection coating container, the upstream face of polypropylene hollow fiber ultrafilter membrane is coated under evacuation environment；
（3）After the completion of coating, by remaining upstream face coated coating emptying in coating container；
（4）With vaccum-pumping equipment to step（2）The polypropylene hollow fiber ultrafilter membrane for processing carries out evacuation process, takes out
Vacuum time is 40 minutes；
（5）Will be to step（4）The polypropylene hollow fiber ultrafilter membrane that evacuation was processed is put in coating container, by water outlet
In top coat injection coating container, the water surface that goes out of polypropylene hollow fiber ultrafilter membrane is applied under evacuation environment
Cover；
Wherein, step（1）、（2）、（4）With（5）In vacuum be -0.1MPa.
The coating of the upstream face coating is made up of the raw material of following parts by weight：
Tricresyl phosphate 30
Dioctyl phthalate 18
Modified polyorganosiloxane polymer 12
Polyether-ether-ketone PEEK 7
Hexamethylenamine 3
Coalescents 5
Ammonium molybdate 9
Polyethylene Glycol 50；
The thickness of the coating of the upstream face coating is about 50-200nm.
It is described go out the water surface coating coating be made up of the raw material of following parts by weight：
Pi-allyl polyoxy alkyl epoxy base ether 19
Tetramethylolmethane 20
Polyethylene Glycol Laurel acid diester 30
The dilute alkylamine 2 of polyoxyethylene
Nanometer silver 5
N-[2-(2-methyl-4-oxopentyl) 2.5
Methyl tetrahydro phthalic anhydride 4.
It is described go out water surface coating the thickness of coating be about 150nm.
The polypropylene hollow fiber membrane of above-mentioned coating high polymer composite coating is applied to into the process of certain landfill leachate,
After pretreatment, the COD for entering water is 2000-4300mg/L, and the COD of water outlet is 110-220 mg/L, and clearance is 94.5-95%,
Treating capacity is 1500L/d, and membrane flux during operation can averagely reach 10L/（m2.h）
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
Those of ordinary skill in the art disclosed herein technical scope in, the change that can expect without creative work or
Replace, all should be included within the scope of the present invention.Therefore, protection scope of the present invention should be limited with claims
Fixed protection domain is defined.
Claims (5)
1. it is a kind of coating high polymer composite coating polypropylene hollow fiber ultrafilter membrane preparation method, it is characterised in that：Poly- third
Alkene hollow fiber ultrafiltration membrane includes upstream face and going out the water surface, in upstream face and goes out the water surface and is respectively coated with coating；Possesses preparation process
It is as follows：
（1）Evacuation process is carried out to polypropylene hollow fiber ultrafilter membrane with vaccum-pumping equipment；
（2）By step（1）The polypropylene hollow fiber ultrafilter membrane that evacuation was processed is put in coating container, by upstream face coating
In coating injection coating container, the upstream face of polypropylene hollow fiber ultrafilter membrane is coated under evacuation environment；
（3）After the completion of coating, by remaining upstream face coated coating emptying in coating container；
（4）With vaccum-pumping equipment to step（2）The polypropylene hollow fiber ultrafilter membrane for processing carries out evacuation process；
（5）Will be to step（4）The polypropylene hollow fiber ultrafilter membrane that evacuation was processed is put in coating container, will go out water surface painting
In coating injection coating container, the water surface that goes out of polypropylene hollow fiber ultrafilter membrane is coated under evacuation environment；
The upstream face coated coating is made up of the raw material of following parts by weight：
Tricresyl phosphate 12-30
Dioctyl phthalate 16-18
Modified polyorganosiloxane polymer 8-12
Polyether-ether-ketone PEEK 6-7
Hexamethylenamine 2-3
Coalescents 2-5
Ammonium molybdate 7-9
Polyethylene Glycol 40-50；
The water outlet top coat is made up of the raw material of following parts by weight：
Pi-allyl polyoxy alkyl epoxy base ether 16-19
Tetramethylolmethane 15-20
Polyethylene Glycol Laurel acid diester 27-30
The dilute alkylamine 1-2 of polyoxyethylene
Nanometer silver 3-5
N-[2-(2-methyl-4-oxopentyl) 1-2.5
Methyl tetrahydro phthalic anhydride 2-4.
2. preparation method according to claim 1, it is characterised in that：The thickness of the coating of the upstream face coating is 80-
200nm。
3. preparation method according to claim 1, it is characterised in that：It is described go out the water surface coating coating thickness be 50-
150nm。
4. preparation method according to claim 1, it is characterised in that：Step（1）With（4）In pumpdown time be 20-
40 minutes.
5. preparation method according to claim 1, it is characterised in that：Step（1）、（2）、（4）With（5）In vacuum
For -0.1MPa.
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| CN105642128B (en) * | 2015-12-31 | 2017-09-22 | 涂瑞强 | A kind of modified polyurethane hollow-fibre membrane used in industrial water processing |
| CN105413481B (en) * | 2015-12-31 | 2017-10-10 | 涂瑞强 | A kind of modified polyurethane flat plate ultrafiltration membrane used in industrial water processing |
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| CN1108583A (en) * | 1994-03-15 | 1995-09-20 | 中国科学院大连化学物理研究所 | Method for preparation of complex film |
| CN1053387C (en) * | 1994-03-15 | 2000-06-14 | 中国科学院大连化学物理研究所 | Method for preparation of improved complex film with coating |
| DE10155901A1 (en) * | 2001-11-14 | 2003-05-15 | Mann & Hummel Filter | Process for producing a coating on a hollow fiber |
| US6716275B1 (en) * | 2001-12-11 | 2004-04-06 | Sandia Corporation | Gas impermeable glaze for sealing a porous ceramic surface |
| CN102343218B (en) * | 2011-09-21 | 2013-07-17 | 杭州洁弗膜技术有限公司 | Preparation method of high-pressure-resistant tubular composite support membrane |
| CN103028536A (en) * | 2012-12-20 | 2013-04-10 | 天邦膜技术国家工程研究中心有限责任公司 | Vacuum coating technology of hollow fiber hydrogen nitrogen membrane component |
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| CB03 | Change of inventor or designer information |
Inventor after: Fu Zhonghe Inventor after: Feng Zhaohai Inventor before: Zhang Zhefu |
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| CB03 | Change of inventor or designer information | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170324 Address after: Wang Wen Zhen Nan Zhuang Cun, Tianjin City, 300380 year Xiqing District Applicant after: Tianjin Promise Plastics Co., Ltd. Address before: The streets of Haicheng Dai Gang Lu Longwan District of Wenzhou City, Zhejiang Province, No. 15 325055 Applicant before: Zhang Zhefu |
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