CN110180415A - A kind of method of hydrophilizing of reverse osmosis membrane - Google Patents
A kind of method of hydrophilizing of reverse osmosis membrane Download PDFInfo
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- CN110180415A CN110180415A CN201910445243.9A CN201910445243A CN110180415A CN 110180415 A CN110180415 A CN 110180415A CN 201910445243 A CN201910445243 A CN 201910445243A CN 110180415 A CN110180415 A CN 110180415A
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- film
- fenton reagent
- reverse osmosis
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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
- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0093—Chemical modification
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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
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
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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
- B01D71/76—Macromolecular material not specifically provided for in a single one of groups B01D71/08 - B01D71/74
- B01D71/82—Macromolecular material not specifically provided for in a single one of groups B01D71/08 - B01D71/74 characterised by the presence of specified groups, e.g. introduced by chemical after-treatment
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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
- B01D2325/36—Hydrophilic membranes
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- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a kind of method of hydrophilizing of reverse osmosis membrane, include the following steps: for film to be placed in machine table, and it is fixed using clamping device, Fenton reagent is dropped evenly in the upper surface of film, the step of Fenton reagent is added dropwise: Fenton reagent solution is drawn with dropper, reagent is added dropwise on the surface of film, shaking film gently 15-20 seconds, the Fenton reagent solution of dropwise addition is covered on the surface of film, the film that Fenton reagent solution is added dropwise is moved on 10-15 DEG C of heating board, addition is every cloth between film and heating board, after heating 2-3 minutes, film cooling is taken out to room temperature, in the upper surface brushing hydrophilic agent of film, the film of hydrophily processing is cleaned, hydrophily reverse osmosis membrane is obtained after drying.
Description
Technical field
The present invention relates to reverse osmosis membrane technology field more particularly to a kind of method of hydrophilizing of reverse osmosis membrane.
Background technique
Reverse osmosis membrane is artificial semi-permeable membrane with certain characteristics made of a kind of simulation biological semi-permeable film, is reverse osmosis skill
The core component of art.Reverse osmosis technology principle is cannot to penetrate half according to other substances under the action of being higher than solution osmotic pressure
Permeable membrane and these substances and water are separated.The membrane aperture of reverse osmosis membrane is very small, therefore can be effectively removed in water
Dissolved salts, colloid, microorganism, organic matter etc..System has good water quality, low, the pollution-free, simple process of energy consumption, easy to operate
The advantages that.
Existing reverse osmosis membrane hydrophily is not strong, leads to poor filtration effect.
Summary of the invention
The invention proposes a kind of method of hydrophilizing of reverse osmosis membrane, to solve mentioned above in the background art ask
Topic.
The invention proposes a kind of method of hydrophilizing of reverse osmosis membrane, include the following steps:
S1: film is placed in machine table, and is fixed using clamping device；
S2: in the step of upper surface of film drops evenly Fenton reagent, Fenton reagent is added dropwise:
A, Fenton reagent solution is drawn with dropper, reagent is added dropwise on the surface of film；
B, shaking film gently 15-20 seconds, the Fenton reagent solution of dropwise addition are covered on the surface of film；
C, the film that Fenton reagent solution is added dropwise is moved on 10-15 DEG C of heating board, is added between film and heating board
Add after cloth, heating 2-3 minutes, takes out film cooling to room temperature；
S3: in the upper surface brushing hydrophilic agent of film；
S4: the film of hydrophily processing is cleaned, obtains hydrophily reverse osmosis membrane after dry.
Preferably, in the S2, the preparation step of the Fenton reagent:
(1) hydrogen peroxide solution of 40% ferrous sulfate solution and 30% is poured into container；
(2) solution in container is stirred, is stirred 2-3 minutes；
(3) container is placed in the warm water that temperature is 20-30 DEG C and is heated, the heating water bath time is 5-8 minutes, is obtained
Fenton reagent.
Preferably, the ratio of the ferrous sulfate solution and hydrogen peroxide solution is 1:1.
Preferably, in the S3, the squeegeeing step of the hydrophilic agent:
(1) hydrophilic agent is sprayed on film, it is using brushing that hydrophilic agent is evenly dispersed；
(2) it places 2-5 minutes, hot blast drying；
(3) hydrophilic agent is sprayed again, it is evenly dispersed, until air-drying.
Preferably, in the S3, the preparation step of the hydrophilic agent:
(1) aluminium oxide is received and is dissolved into dimethylformamide, alumina sol is made；
(2) titanium oxide solution is added into alumina sol, and it is 3-5 that hydrochloric acid, which is added, to adjust pH value；
(3) dispersing agent is added in alumina sol, heating water bath stirs 1~3h to 30-40 DEG C；
(4) after holding liquid placement 3-4 hours, hydrophilic agent is formed.
Preferably, in the S4, the film drying step:
(1) filter membrane is placed in drying mechanism, adjusts the temperature to 30-35 DEG C, heated 10-15 minutes；
(2) it reduces and adjusts the temperature to 8-12 DEG C, heat 1-2 hours.
A kind of method of hydrophilizing of reverse osmosis membrane proposed by the present invention, beneficial effect are:
1, it is reacted by Fenton reagent and film, generating unsaturated double-bond can after film surface introduces hydroxyl radical free radical
Through hydrogen bond action in conjunction with some hydrophilic radicals, so that it is stable hydrophilic to have film.
2, by brushing hydrophilic agent, the double-deck hydrophilic layer improves the hydrophilicity of reverse osmosis membrane.
Specific embodiment
It is next combined with specific embodiments below that the present invention will be further described.
Embodiment 1
The invention proposes a kind of method of hydrophilizing of reverse osmosis membrane, include the following steps:
S1: film is placed in machine table, and is fixed using clamping device, thin during reagent is added dropwise
Film does not move；
S2: dropping evenly Fenton reagent in the upper surface of film, and Fenton reagent reacts with film, generates unsaturated double
Key can be by hydrogen bond action in conjunction with some hydrophilic radicals, so that film be made to have stabilization after film surface introduces hydroxyl radical free radical
Hydrophily, the preparation step of Fenton reagent:
(1) hydrogen peroxide solution of 40% ferrous sulfate solution and 30% is poured into container, ferrous sulfate solution and double
The ratio of oxygen aqueous solution is 1:1；
(2) solution in container is stirred, is stirred 2 minutes, so that ferrous sulfate solution and hydrogen peroxide solution are abundant
Reaction；
(3) container is placed in the warm water that temperature is 20 DEG C and is heated, heating water bath accelerates the progress of reaction, and water-bath adds
The hot time is 5 minutes, obtains Fenton reagent；
The step of Fenton reagent is added dropwise:
A, Fenton reagent solution is drawn with dropper, reagent is added dropwise on the surface of film, reagent reacts with film；
B, shaking film gently 15 seconds, the Fenton reagent solution of dropwise addition are covered on the surface of film, and shaking gently is thin
Film, Fenton reagent is mobile in film surface, completely attaches to film surface, generates hydrophilic radical；
C, the film that Fenton reagent solution is added dropwise is moved on 10 DEG C of heating board, accelerates the anti-of Fenton reagent and film
It answers, generates hydrophilic radical, addition takes out film cooling to room temperature after cloth, heating 2 minutes between film and heating board；
S3: in the upper surface brushing hydrophilic agent of film, the preparation step of hydrophilic agent:
(1) aluminium oxide is received and is dissolved into dimethylformamide, alumina sol is made；
(2) titanium oxide solution is added into alumina sol, and it is 3 that hydrochloric acid, which is added, to adjust pH value；
(3) dispersing agent is added in alumina sol, heating water bath stirs 1h to 30 DEG C, so that dispersing agent uniformly divides
It is dispersed in colloidal sol；
(4) after holding liquid placement 3 hours, hydrophilic agent is formed；
The squeegeeing step of hydrophilic agent:
(1) hydrophilic agent is sprayed on film, it is using brushing that hydrophilic agent is evenly dispersed；
(2) it places 2 minutes, hot blast drying, so that hydrophilic agent is bonded on film；
(3) hydrophilic agent is sprayed again, it is evenly dispersed, the double-deck hydrophilic layer is formed until air-drying；
S4: the film of hydrophily processing is cleaned, obtains hydrophily reverse osmosis membrane after dry, film drying steps:
(1) filter membrane is placed in drying mechanism, adjusts the temperature to 30 DEG C, heated 10 minutes；
(2) it reduces and adjusts the temperature to 8 DEG C, heat 1 hour.
Embodiment 2
The invention proposes a kind of method of hydrophilizing of reverse osmosis membrane, include the following steps:
S1: film is placed in machine table, and is fixed using clamping device, thin during reagent is added dropwise
Film does not move；
S2: dropping evenly Fenton reagent in the upper surface of film, and Fenton reagent reacts with film, generates unsaturated double
Key can be by hydrogen bond action in conjunction with some hydrophilic radicals, so that film be made to have stabilization after film surface introduces hydroxyl radical free radical
Hydrophily, the preparation step of Fenton reagent:
(1) hydrogen peroxide solution of 40% ferrous sulfate solution and 30% is poured into container, ferrous sulfate solution and double
The ratio of oxygen aqueous solution is 1:1；
(2) solution in container is stirred, is stirred 2.5 minutes, so that ferrous sulfate solution and hydrogen peroxide solution fill
Divide reaction；
(3) container is placed in the warm water that temperature is 25 DEG C and is heated, heating water bath accelerates the progress of reaction, and water-bath adds
The hot time is 6.5 minutes, obtains Fenton reagent；
The step of Fenton reagent is added dropwise:
A, Fenton reagent solution is drawn with dropper, reagent is added dropwise on the surface of film, reagent reacts with film；
B, shaking film gently 17 seconds, the Fenton reagent solution of dropwise addition are covered on the surface of film, and Fenton reagent is thin
Film surface is mobile, completely attaches to film surface, generates hydrophilic radical；
C, the film that Fenton reagent solution is added dropwise is moved on 12 DEG C of heating board, accelerates the anti-of Fenton reagent and film
It answers, generates hydrophilic radical, addition takes out film cooling to room temperature after cloth, heating 2.5 minutes between film and heating board；
S3: in the upper surface brushing hydrophilic agent of film, the preparation step of hydrophilic agent:
(1) aluminium oxide is received and is dissolved into dimethylformamide, alumina sol is made；
(2) titanium oxide solution is added into alumina sol, and it is 4 that hydrochloric acid, which is added, to adjust pH value；
(3) dispersing agent is added in alumina sol, heating water bath stirs 2h to 35 DEG C, so that dispersing agent uniformly divides
It is dispersed in colloidal sol；
(4) after holding liquid placement 3.5 hours, hydrophilic agent is formed；
The squeegeeing step of hydrophilic agent:
(1) hydrophilic agent is sprayed on film, it is using brushing that hydrophilic agent is evenly dispersed；
(2) it places 3.5 minutes, hot blast drying, so that hydrophilic agent is bonded on film；
(3) hydrophilic agent is sprayed again, it is evenly dispersed, the double-deck hydrophilic layer is formed until air-drying；
S4: the film of hydrophily processing is cleaned, obtains hydrophily reverse osmosis membrane after dry, film drying steps:
(1) filter membrane is placed in drying mechanism, adjusts the temperature to 33 DEG C, heated 12.5 minutes；
(2) it reduces and adjusts the temperature to 10 DEG C, heat 1.5 hours.
Embodiment 3
The invention proposes a kind of method of hydrophilizing of reverse osmosis membrane, include the following steps:
S1: film is placed in machine table, and is fixed using clamping device, thin during reagent is added dropwise
Film does not move；
S2: dropping evenly Fenton reagent in the upper surface of film, and Fenton reagent reacts with film, generates unsaturated double
Key can be by hydrogen bond action in conjunction with some hydrophilic radicals, so that film be made to have stabilization after film surface introduces hydroxyl radical free radical
Hydrophily, the preparation step of Fenton reagent:
(1) hydrogen peroxide solution of 40% ferrous sulfate solution and 30% is poured into container, ferrous sulfate solution and double
The ratio of oxygen aqueous solution is 1:1；
(2) solution in container is stirred, is stirred 3 minutes, so that ferrous sulfate solution and hydrogen peroxide solution are abundant
Reaction；
(3) container is placed in the warm water that temperature is 30 degrees Celsius and is heated, heating water bath accelerates the progress of reaction, water
Bathing heating time is 8 minutes, obtains Fenton reagent；
The step of Fenton reagent is added dropwise:
A, Fenton reagent solution is drawn with dropper, reagent is added dropwise on the surface of film, reagent reacts with film；
B, shaking film gently 20 seconds, the Fenton reagent solution of dropwise addition are covered on the surface of film, and Fenton reagent is thin
Film surface is mobile, completely attaches to film surface, generates hydrophilic radical；
C, the film that Fenton reagent solution is added dropwise is moved on 15 DEG C of heating board, accelerates the anti-of Fenton reagent and film
It answers, generates hydrophilic radical, addition takes out film cooling to room temperature after cloth, heating 3 minutes between film and heating board；
S3: in the upper surface brushing hydrophilic agent of film, the preparation step of hydrophilic agent:
(1) aluminium oxide is received and is dissolved into dimethylformamide, alumina sol is made；
(2) titanium oxide solution is added into alumina sol, and it is 5 that hydrochloric acid, which is added, to adjust pH value；
(3) dispersing agent is added in alumina sol, heating water bath stirs 3h to 40 DEG C, so that dispersing agent uniformly divides
It is dispersed in colloidal sol；
(4) after holding liquid placement 4 hours, hydrophilic agent is formed；
The squeegeeing step of hydrophilic agent:
(1) hydrophilic agent is sprayed on film, it is using brushing that hydrophilic agent is evenly dispersed；
(2) it places 5 minutes, hot blast drying, so that hydrophilic agent is bonded on film；
(3) hydrophilic agent is sprayed again, it is evenly dispersed, the double-deck hydrophilic layer is formed until air-drying；
S4: the film of hydrophily processing is cleaned, obtains hydrophily reverse osmosis membrane after dry, film drying steps:
(1) filter membrane is placed in drying mechanism, adjusts the temperature to 35 DEG C, heated 15 minutes；
(2) it reduces and adjusts the temperature to 12 degrees Celsius, heat 2 hours.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of method of hydrophilizing of reverse osmosis membrane, which comprises the following steps:
S1: film is placed in machine table, and is fixed using clamping device；
S2: in the step of upper surface of film drops evenly Fenton reagent, Fenton reagent is added dropwise:
A, Fenton reagent solution is drawn with dropper, reagent is added dropwise on the surface of film；
B, shaking film gently 15-20 seconds, the Fenton reagent solution of dropwise addition are covered on the surface of film；
C, by be added dropwise Fenton reagent solution film be moved on 10-15 DEG C of heating board, between film and heating board addition every
Cloth after heating 2-3 minutes, takes out film cooling to room temperature；
S3: in the upper surface brushing hydrophilic agent of film；
S4: the film of hydrophily processing is cleaned, obtains hydrophily reverse osmosis membrane after dry.
2. a kind of method of hydrophilizing of reverse osmosis membrane according to claim 1, which is characterized in that in the S2, institute
State the preparation step of Fenton reagent:
(1) hydrogen peroxide solution of 40% ferrous sulfate solution and 30% is poured into container；
(2) solution in container is stirred, is stirred 2-3 minutes；
(3) container is placed in the warm water that temperature is 20-30 DEG C and is heated, the heating water bath time is 5-8 minutes, obtains Fenton
Reagent.
3. a kind of method of hydrophilizing of reverse osmosis membrane according to claim 2, which is characterized in that the ferrous sulfate
The ratio of solution and hydrogen peroxide solution is 1:1.
4. a kind of method of hydrophilizing of reverse osmosis membrane according to claim 1, which is characterized in that in the S3, institute
State the squeegeeing step of hydrophilic agent:
(1) hydrophilic agent is sprayed on film, it is using brushing that hydrophilic agent is evenly dispersed；
(2) it places 2-5 minutes, hot blast drying；
(3) hydrophilic agent is sprayed again, it is evenly dispersed, until air-drying.
5. a kind of method of hydrophilizing of reverse osmosis membrane according to claim 1, which is characterized in that in the S3, institute
State the preparation step of hydrophilic agent:
(1) aluminium oxide is received and is dissolved into dimethylformamide, alumina sol is made；
(2) titanium oxide solution is added into alumina sol, and it is 3-5 that hydrochloric acid, which is added, to adjust pH value；
(3) dispersing agent is added in alumina sol, heating water bath stirs 1~3h to 30-40 DEG C；
(4) after holding liquid placement 3-4 hours, hydrophilic agent is formed.
6. a kind of method of hydrophilizing of reverse osmosis membrane according to claim 1, which is characterized in that in the S4, institute
State film drying step:
(1) filter membrane is placed in drying mechanism, adjusts the temperature to 30-35 DEG C, heated 10-15 minutes；
(2) it reduces and adjusts the temperature to 8-12 DEG C, heat 1-2 hours.
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| CN201910445243.9A CN110180415A (en) | 2019-05-27 | 2019-05-27 | A kind of method of hydrophilizing of reverse osmosis membrane |
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| CN201910445243.9A CN110180415A (en) | 2019-05-27 | 2019-05-27 | A kind of method of hydrophilizing of reverse osmosis membrane |
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Citations (6)
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|---|---|---|---|---|
| US6153688A (en) * | 1995-03-31 | 2000-11-28 | Daikin Industries, Ltd. | Aqueous polytetrafluoroethylene dispersion composition and use thereof |
| JP2006032157A (en) * | 2004-07-16 | 2006-02-02 | Asahi Glass Co Ltd | Electrolyte material for polymer electrolyte fuel cell, its manufacturing method and membrane-electrode assembly for polymer electrolyte fuel cell |
| CN101357304A (en) * | 2008-09-24 | 2009-02-04 | 哈尔滨工业大学 | Surface modification method of polyvinylidene fluoride membrane |
| CN101905123A (en) * | 2009-06-03 | 2010-12-08 | 中国科学院大连化学物理研究所 | Blending modification method of polyvinylidene fluoride ultrafiltration membrane |
| CN102888016A (en) * | 2012-09-12 | 2013-01-23 | 常州大学 | Preparation method of lithium-ion secondary battery diaphragm with a crosslinking composite layer |
| CN107174979A (en) * | 2017-04-29 | 2017-09-19 | 成都博美实润科技有限公司 | A kind of preparation method of hydrophilicity kynoar film |
-
2019
- 2019-05-27 CN CN201910445243.9A patent/CN110180415A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6153688A (en) * | 1995-03-31 | 2000-11-28 | Daikin Industries, Ltd. | Aqueous polytetrafluoroethylene dispersion composition and use thereof |
| JP2006032157A (en) * | 2004-07-16 | 2006-02-02 | Asahi Glass Co Ltd | Electrolyte material for polymer electrolyte fuel cell, its manufacturing method and membrane-electrode assembly for polymer electrolyte fuel cell |
| CN101357304A (en) * | 2008-09-24 | 2009-02-04 | 哈尔滨工业大学 | Surface modification method of polyvinylidene fluoride membrane |
| CN101905123A (en) * | 2009-06-03 | 2010-12-08 | 中国科学院大连化学物理研究所 | Blending modification method of polyvinylidene fluoride ultrafiltration membrane |
| CN102888016A (en) * | 2012-09-12 | 2013-01-23 | 常州大学 | Preparation method of lithium-ion secondary battery diaphragm with a crosslinking composite layer |
| CN107174979A (en) * | 2017-04-29 | 2017-09-19 | 成都博美实润科技有限公司 | A kind of preparation method of hydrophilicity kynoar film |
Non-Patent Citations (1)
| Title |
|---|
| 李定或: "《化工工艺研究进展》", 30 September 1998, 化学工业出版社 * |
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Application publication date: 20190830 |