CN107486040A - A kind of low-pressure high-throughput reverse osmosis membrane and its manufacture method - Google Patents
A kind of low-pressure high-throughput reverse osmosis membrane and its manufacture method Download PDFInfo
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- CN107486040A CN107486040A CN201710959654.0A CN201710959654A CN107486040A CN 107486040 A CN107486040 A CN 107486040A CN 201710959654 A CN201710959654 A CN 201710959654A CN 107486040 A CN107486040 A CN 107486040A
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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
- B01D71/66—Polymers having sulfur in the main chain, with or without nitrogen, oxygen or carbon only
- B01D71/68—Polysulfones; Polyethersulfones
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
-
- 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
- B01D67/0002—Organic membrane manufacture
- B01D67/0009—Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching
- B01D67/0011—Casting solutions therefor
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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
-
- 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
- B01D2325/00—Details relating to properties of membranes
- B01D2325/30—Chemical resistance
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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
Abstract
The invention discloses a kind of low-pressure high-throughput reverse osmosis membrane and its manufacture method, the reverse osmosis membrane is prepared by following raw materials：Polyarylsulfone (PAS), organic solvent, pore-foaming agent, non-woven fabrics, aromatic amine, deionized water, aroyl chloride, nitrous acid, polyethylene alcohol and water；The preparation method of the present invention comprises the following steps：Supporter casting solution is prepared, support body layer is prepared, prepares functional layer solution, prepares functional layer and prepare overcoat；Present invention doping increase hydroaropic substance in membrane material can improve the water-flowing amount of reverse osmosis membrane, it is modified by hydrophilic radical, under lower pressure operation, there is higher water flux, under the conditions of higher water flux, antifouling property is higher, higher antifouling property, higher service life is ensure that, by overcoat and functional layer by chemical bonds the most stable, and reaches good safeguard function and stability in use.
Description
Technical field
The present invention relates to membrane for water treatment separation technology field, specially a kind of low-pressure high-throughput reverse osmosis membrane and its manufacturer
Method.
Background technology
Reverse osmosis composite membrane is a kind of high polymer material membrane for water treatment of energy-conserving and environment-protective, is mainly used in drinking water, industry
Pure water, desalinization industry and special water treatment field；Nanofiltration and reverse osmosis membrane are because to organic molecule and inorganic ion
Remarkable separating property, and safety, it is environment-friendly, it is easy to operate the advantages that and one of key technology as water process.It should
With including wide spectrums such as seawater and the bitter degree of saltiness, water softening, middle Water Sproading, Industrial Wastewater Treatment, ultra-pure water preparations.Wherein
Composite membrane because it can optimize the performances such as the rejection of film, water flux, stability and as current development it is most fast, using most
Film kind, the nanofiltration more than 90% and reverse osmosis membrane are composite membranes in the market.Composite membrane refers in porous support counterdie
Upper compound one layer different materials that is very thin, fine and close, having special separation function.Compared with integrated film, the surface of composite membrane
Dense layer thickness is thinner, so that film has the transmission rates of high solute separation rate and water simultaneously, and it is optimizable physico
Structure is learned, a variety of Selective Separation demands can be met.The composite membrane being currently widely used in water treatment field is mainly adopted
The mode of interfacial polymerization is taken, polyamide film is combined to micropore support counterdie surface.The chemical constitution of polyamide makes such multiple
The chlorine-resistant property of conjunction film is very weak, and all commercial polyamide composite films are almost nil to the permission of free chlorine, so as to add film
Pretreatment cost and reduce service life.In order to improve the chlorine resistance of polyamide composite film, do a lot of work both at home and abroad,
It is concentrated mainly on by using post processings such as oxidation/chlorinations that different monomers change the chemical constitution of polyamide or pass through film surface
Means increase the chemical-resistant stability of film, but such method often loses other performance as reduced rejection or water flux.In
State's patent 95116419.8 " method that Interface Control prepares chlorine-resistant aromatic polyamides reverse osmosis composite membrane ", is changed by Chemical Physics
Property make interface produce cross-linked structure, so as to substantially increase the chlorine-resistant property of polyamide reverse osmosis composite film.Improve in water flux
Aspect, in addition to widely applying various additives, nano particle is distributed to polyamines or more by United States Patent (USP) US20100062156
In first solution of acid chloride, the compound membrane flux of gained can significantly improve.
Commercialized reverse osmosis membrane is prepared by modified cellulose acetate at first, the reverse osmosis membrane water flux produced with
For salt rejection rate all than relatively low, chlorine-resistant property is preferable, and by process optimization, salt rejection rate is improved, but water flux is relatively low all the time, should
With being very limited.The complex reverse osmosis membrane based on polyamide structure obtained commercial applications later, and with its high flux,
High desalination, the advantage of low energy consumption, obtain rapidly extensive use, turn into most commonly used reverse osmosis membrane.Existing complex reverse osmosis membrane
General preparation method is two steps：The first step scratches a floor height molecular material as porous support layer on PET non-woven fabrics, and second
Step progress interfacial polycondensation reaction generation polyamide three-dimensional crosslinking structure on supporting layer, formation desalination functional layer (US5160619,
US4277344, JP63004803, CN101601975).Although existing complex reverse osmosis membrane is with higher water flux and takes off
Salt rate, but due to distinctive three-layer composite structure, its gross thickness is caused to reach 140 microns, it is even thicker.It is unfavorable for counter-infiltration
Component further saves space, and effectively membrane area is difficult to be lifted in unit volume, is the main restricting factor of component design optimization.
For the structure of a lot of complex reverse osmosis membranes due to being multilayer, thickness can be bigger than general monofilm thickness at present, although de-
Salt performance increases, but because accumulation dirt causes water flux to diminish after long-time use so that reverse osmosis efficiency reduces,
The modification of supporting layer simultaneously, with nano material doping vario-property polyethers sulfolane solution, the contribution to final performance is limited；Select other work(
Energy high polymer material such as PAEK, material expensive, manufacturing process are complicated.The modification of functional layer, by merely in organic phase
Or chemical composition is added in oil phase, either improve pure water flux and reduce salinity removal efficiency, or improve salinity removing
Rate and reduce pure water flux.Unilateral improvement performance.The modification of overcoat, applied by the material for finding hydrophilic or special electric charge
Overlay on outside functional layer.With functional layer physical absorption or hydrogen bond, initial performance is good, easy to fall off in use and stability
Difference.
The content of the invention
The present invention provides a kind of low-pressure high-throughput reverse osmosis membrane and its manufacture method, the doping increase hydrophily in membrane material
Material can improve the water-flowing amount of reverse osmosis membrane, be modified by hydrophilic radical, under lower pressure operation, have higher water to lead to
Amount, under the conditions of higher water flux, antifouling property is higher, higher antifouling property, ensure that higher service life,
By overcoat and functional layer by chemical bonds the most stable, and reach good safeguard function and stability in use, can be with
Effectively solve the problems, such as in above-mentioned background technology.
To achieve the above object, the present invention provides following technical scheme：A kind of low-pressure high-throughput reverse osmosis membrane, the reverse osmosis
Permeable membrane is prepared by following raw materials：Polyarylsulfone (PAS), organic solvent, pore-foaming agent, non-woven fabrics, aromatic amine, deionized water, fragrant acyl
Chlorine, nitrous acid, polyethylene alcohol and water, the parts by weight of above-mentioned raw materials are：Polyarylsulfone (PAS) 20-30 parts, organic solvent 100-200 parts, cause
Hole agent 5-10 parts, non-woven fabrics 10-20 parts, aromatic amine 3-15 parts, deionized water 100-200 parts, aroyl chloride 1-10 parts, nitrous acid
4-6 parts, polyvinyl alcohol 4-6 parts and pure water 100-200 parts.
A kind of low-pressure high-throughput reverse osmosis membrane manufacture method, comprises the following steps：
1) supporter casting solution is prepared：First dispensing is carried out according to above-mentioned weight part ratio；Then by polyarylsulfone (PAS), organic solvent,
Pore-foaming agent, into casting solution, is stirred by above-mentioned parts by weight, ultrasound degassing 10-30min after 12h is stood, as supporter
Casting solution；Wherein casting solution concentration is 10-30%wt；
2) support body layer is prepared：Casting solution made from step 1) is applied to non-woven fabrics after above-mentioned dispensing using knifing machine
On, thickness is 10-150 μm, immerses gel solidification film forming in 15-25 DEG C of deionized water after then evaporating 5-30s at room temperature, passes through
Normal temperature is washed, and support body layer is made after 60-90 DEG C of hot water treatment；
3) functional layer solution is prepared：The functional layer solution includes solution A and solution B, and the solute of the solution A is fragrance
Amine, solvent are water, concentration 5-20%wt, are by aromatic amine and water after above-mentioned dispensing, mixing, the solute of the solution B
Aroyl chloride, solvent are organic solvent, and concentration 5-20%wt, by aroyl chloride and organic solvent after above-mentioned dispensing, mixing is
Can；
4) functional layer is prepared：By 5-60s in support body layer surface elder generation dipping solution A made from step 2), then in room temperature
Lower standing 5-30s, then 5-30s in dipping solution B, after at room temperature stand reaction 1-10min produce functional layer；Then by function
Layer uses 0.1%-1% nitrous acid treatments 2-30min, you can；
5) overcoat is prepared：The functional layer that step 4) treats is soaked into 1- by 0.1%-10% poly-vinyl alcohol solution
10min, then infrared heating processing 5-20min, last cooling combined formed produce reverse osmosis membrane.
According to above-mentioned technical proposal, the organic solvent is the organic solvent after purification, and its purification system includes：Heating
Device, it is heated to mixed liquor；Seepage slope device, it is arranged at the back segment of heater, possesses Pervaporation membrane, and will have
Solvent and water separation；Kettle is evaporated under reduced pressure, wherein supplying the organic solvent from the concentration side recovery of seepage slope device；With with
Pipe, it supplies the organic solvent to gasify in kettle is evaporated under reduced pressure the thermal source to heater as heater, and its method of purification is：
The heating process heated to the mixed liquor；Using Pervaporation membrane, the mixed liquor by heating is separated into institute
The process for stating organic solvent and the water；Steamed with the organic solvent from the concentration side recovery of the Pervaporation membrane is depressurized
The step of hair, wherein, it is used as the heat in the heating process using by the reduction vaporization and the organic solvent to gasify
Source.
According to above-mentioned technical proposal, the preparation method of the pore-foaming agent is：A certain proportion of surface is added in monomer to live
Property agent, inorganic salts and cosurfactant, then be added to together in a certain amount of distilled water, stirring, emulsification, static obtain water bag
Oil type microemulsion, certain density water soluble starter monomer is added in the microemulsion, lead to N2Protection, mechanical agitation, heating,
After carrying out polymerisation certain time, alkali lye is added dropwise in system, regulation pH value is 8-10, obtains that there is certain hydrophilic and oleophilic to put down
Weighing apparatus value, particle diameter distribution be receive Porous materials of the monodispersed, size range in 20-500nm prepare special pore-foaming agent.
According to above-mentioned technical proposal, the main component of the non-woven fabrics is PET；The polyarylsulfone (PAS)
Include polyarylsulfone (PAS), polyether sulphone, the one or more of polyether ethersulfone；The aromatic amine includes m-phenylene diamine (MPD), o-phenylenediamine, to benzene
The one or more of diamines；The aroyl chloride includes pyromellitic trimethylsilyl chloride, paraphthaloyl chloride, simple phthalyl chloride, adjacent benzene
The one or more of dimethyl chloride；The pore-foaming agent includes alcohols pore-foaming agent and ethers pore-foaming agent.
According to above-mentioned technical proposal, the infrared heating processing is heated specifically by infrared heating device,
Temperature rises the adhesive reached in activation sizing material, and the infrared heating device is by electric heating tube and power control unit group
Into different specification products has different speed by infrared heating device, is passed through according to the product of different calibers infrared
The speed of heater can be adjusted to 5m/min-10m/min, then adjust the power of heating tube, you can.
According to above-mentioned technical proposal, the heating power is controlled in 65%-70%, and heating and temperature control is at 170 DEG C -180
℃。
Compared with prior art, beneficial effects of the present invention：Doping increase hydroaropic substance can improve in membrane material
The water-flowing amount of reverse osmosis membrane, is modified by hydrophilic radical, under lower pressure operation, there is higher water flux, in higher water
Under flux conditions, antifouling property is higher, higher antifouling property, higher service life is ensure that, by overcoat and work(
Ergosphere reaches good safeguard function and stability in use by chemical bonds the most stable.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and a part for constitution instruction, the reality with the present invention
Apply example to be used to explain the present invention together, be not construed as limiting the invention.
In the accompanying drawings：
Fig. 1 is the preparation flow figure of the present invention.
Embodiment
The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that described herein preferred real
Apply example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
Embodiment 1：As shown in figure 1, the present invention provides a kind of low-pressure high-throughput reverse osmosis membrane, the reverse osmosis membrane is by following
Raw material is prepared：20 parts of polyarylsulfone (PAS), 100 parts of organic solvent, 5 parts of pore-foaming agent, 10 parts of non-woven fabrics, 3 parts of aromatic amine, deionized water
100 parts, 1 part of aroyl chloride, 100 parts of 4 parts of nitrous acid, 4 parts of polyvinyl alcohol and pure water.
A kind of low-pressure high-throughput reverse osmosis membrane manufacture method, comprises the following steps：
1) supporter casting solution is prepared：First dispensing is carried out according to above-mentioned weight part ratio；Then by polyarylsulfone (PAS), organic solvent,
Pore-foaming agent, into casting solution, is stirred by above-mentioned parts by weight, ultrasound degassing 10-30min after 12h is stood, as supporter
Casting solution；Wherein casting solution concentration is 10-30%wt；
2) support body layer is prepared：Casting solution made from step 1) is applied to non-woven fabrics after above-mentioned dispensing using knifing machine
On, thickness is 10-150 μm, immerses gel solidification film forming in 15-25 DEG C of deionized water after then evaporating 5-30s at room temperature, passes through
Normal temperature is washed, and support body layer is made after 60-90 DEG C of hot water treatment；
3) functional layer solution is prepared：The functional layer solution includes solution A and solution B, and the solute of the solution A is fragrance
Amine, solvent are water, concentration 5-20%wt, are by aromatic amine and water after above-mentioned dispensing, mixing, the solute of the solution B
Aroyl chloride, solvent are organic solvent, and concentration 5-20%wt, by aroyl chloride and organic solvent after above-mentioned dispensing, mixing is
Can；
4) functional layer is prepared：By 5-60s in support body layer surface elder generation dipping solution A made from step 2), then in room temperature
Lower standing 5-30s, then 5-30s in dipping solution B, after at room temperature stand reaction 1-10min produce functional layer；Then by function
Layer uses 0.1%-1% nitrous acid treatments 2-30min, you can；
5) overcoat is prepared：The functional layer that step 4) treats is soaked into 1- by 0.1%-10% poly-vinyl alcohol solution
10min, then infrared heating processing 5-20min, last cooling combined formed produce reverse osmosis membrane.
According to above-mentioned technical proposal, the organic solvent is the organic solvent after purification, and its purification system includes：Heating
Device, it is heated to mixed liquor；Seepage slope device, it is arranged at the back segment of heater, possesses Pervaporation membrane, and will have
Solvent and water separation；Kettle is evaporated under reduced pressure, wherein supplying the organic solvent from the concentration side recovery of seepage slope device；With with
Pipe, it supplies the organic solvent to gasify in kettle is evaporated under reduced pressure the thermal source to heater as heater, and its method of purification is：
The heating process heated to the mixed liquor；Using Pervaporation membrane, the mixed liquor by heating is separated into institute
The process for stating organic solvent and the water；Steamed with the organic solvent from the concentration side recovery of the Pervaporation membrane is depressurized
The step of hair, wherein, it is used as the heat in the heating process using by the reduction vaporization and the organic solvent to gasify
Source.
According to above-mentioned technical proposal, the preparation method of the pore-foaming agent is：A certain proportion of surface is added in monomer to live
Property agent, inorganic salts and cosurfactant, then be added to together in a certain amount of distilled water, stirring, emulsification, static obtain water bag
Oil type microemulsion, certain density water soluble starter monomer is added in the microemulsion, lead to N2Protection, mechanical agitation, heating,
After carrying out polymerisation certain time, alkali lye is added dropwise in system, regulation pH value is 8-10, obtains that there is certain hydrophilic and oleophilic to put down
Weighing apparatus value, particle diameter distribution be receive Porous materials of the monodispersed, size range in 20-500nm prepare special pore-foaming agent.
According to above-mentioned technical proposal, the main component of the non-woven fabrics is PET；The polyarylsulfone (PAS)
Include polyarylsulfone (PAS), polyether sulphone, the one or more of polyether ethersulfone；The aromatic amine includes m-phenylene diamine (MPD), o-phenylenediamine, to benzene
The one or more of diamines；The aroyl chloride includes pyromellitic trimethylsilyl chloride, paraphthaloyl chloride, simple phthalyl chloride, adjacent benzene
The one or more of dimethyl chloride；The pore-foaming agent includes alcohols pore-foaming agent and ethers pore-foaming agent.
According to above-mentioned technical proposal, the infrared heating processing is heated specifically by infrared heating device,
Temperature rises the adhesive reached in activation sizing material, and the infrared heating device is by electric heating tube and power control unit group
Into different specification products has different speed by infrared heating device, is passed through according to the product of different calibers infrared
The speed of heater can be adjusted to 5m/min-10m/min, then adjust the power of heating tube, you can.
According to above-mentioned technical proposal, the heating power is controlled in 65%-70%, and heating and temperature control is at 170 DEG C -180
℃。
Embodiment 2：As shown in figure 1, the present invention provides a kind of low-pressure high-throughput reverse osmosis membrane, the reverse osmosis membrane is by following
Raw material is prepared：It is polyarylsulfone (PAS), organic solvent, pore-foaming agent, non-woven fabrics, aromatic amine, deionized water, aroyl chloride, nitrous acid, poly-
Ethene alcohol and water, the parts by weight of above-mentioned raw materials are：30 parts of polyarylsulfone (PAS), 200 parts of organic solvent, 10 parts of pore-foaming agent, 20 parts of non-woven fabrics,
200 parts of 15 parts of aromatic amine, 200 parts of deionized water, 10 parts of aroyl chloride, 6 parts of nitrous acid, 6 parts of polyvinyl alcohol and pure water.
A kind of low-pressure high-throughput reverse osmosis membrane manufacture method, comprises the following steps：
1) supporter casting solution is prepared：First dispensing is carried out according to above-mentioned weight part ratio；Then by polyarylsulfone (PAS), organic solvent,
Pore-foaming agent, into casting solution, is stirred by above-mentioned parts by weight, ultrasound degassing 10-30min after 12h is stood, as supporter
Casting solution；Wherein casting solution concentration is 10-30%wt；
2) support body layer is prepared：Casting solution made from step 1) is applied to non-woven fabrics after above-mentioned dispensing using knifing machine
On, thickness is 10-150 μm, immerses gel solidification film forming in 15-25 DEG C of deionized water after then evaporating 5-30s at room temperature, passes through
Normal temperature is washed, and support body layer is made after 60-90 DEG C of hot water treatment；
3) functional layer solution is prepared：The functional layer solution includes solution A and solution B, and the solute of the solution A is fragrance
Amine, solvent are water, concentration 5-20%wt, are by aromatic amine and water after above-mentioned dispensing, mixing, the solute of the solution B
Aroyl chloride, solvent are organic solvent, and concentration 5-20%wt, by aroyl chloride and organic solvent after above-mentioned dispensing, mixing is
Can；
4) functional layer is prepared：By 5-60s in support body layer surface elder generation dipping solution A made from step 2), then in room temperature
Lower standing 5-30s, then 5-30s in dipping solution B, after at room temperature stand reaction 1-10min produce functional layer；Then by function
Layer uses 0.1%-1% nitrous acid treatments 2-30min, you can；
5) overcoat is prepared：The functional layer that step 4) treats is soaked into 1- by 0.1%-10% poly-vinyl alcohol solution
10min, then infrared heating processing 5-20min, last cooling combined formed produce reverse osmosis membrane.
According to above-mentioned technical proposal, the organic solvent is the organic solvent after purification, and its purification system includes：Heating
Device, it is heated to mixed liquor；Seepage slope device, it is arranged at the back segment of heater, possesses Pervaporation membrane, and will have
Solvent and water separation；Kettle is evaporated under reduced pressure, wherein supplying the organic solvent from the concentration side recovery of seepage slope device；With with
Pipe, it supplies the organic solvent to gasify in kettle is evaporated under reduced pressure the thermal source to heater as heater, and its method of purification is：
The heating process heated to the mixed liquor；Using Pervaporation membrane, the mixed liquor by heating is separated into institute
The process for stating organic solvent and the water；Steamed with the organic solvent from the concentration side recovery of the Pervaporation membrane is depressurized
The step of hair, wherein, it is used as the heat in the heating process using by the reduction vaporization and the organic solvent to gasify
Source.
According to above-mentioned technical proposal, the preparation method of the pore-foaming agent is：A certain proportion of surface is added in monomer to live
Property agent, inorganic salts and cosurfactant, then be added to together in a certain amount of distilled water, stirring, emulsification, static obtain water bag
Oil type microemulsion, certain density water soluble starter monomer is added in the microemulsion, lead to N2Protection, mechanical agitation, heating,
After carrying out polymerisation certain time, alkali lye is added dropwise in system, regulation pH value is 8-10, obtains that there is certain hydrophilic and oleophilic to put down
Weighing apparatus value, particle diameter distribution be receive Porous materials of the monodispersed, size range in 20-500nm prepare special pore-foaming agent.
According to above-mentioned technical proposal, the main component of the non-woven fabrics is PET；The polyarylsulfone (PAS)
Include polyarylsulfone (PAS), polyether sulphone, the one or more of polyether ethersulfone；The aromatic amine includes m-phenylene diamine (MPD), o-phenylenediamine, to benzene
The one or more of diamines；The aroyl chloride includes pyromellitic trimethylsilyl chloride, paraphthaloyl chloride, simple phthalyl chloride, adjacent benzene
The one or more of dimethyl chloride；The pore-foaming agent includes alcohols pore-foaming agent and ethers pore-foaming agent.
According to above-mentioned technical proposal, the infrared heating processing is heated specifically by infrared heating device,
Temperature rises the adhesive reached in activation sizing material, and the infrared heating device is by electric heating tube and power control unit group
Into different specification products has different speed by infrared heating device, is passed through according to the product of different calibers infrared
The speed of heater can be adjusted to 5m/min-10m/min, then adjust the power of heating tube, you can.
According to above-mentioned technical proposal, the heating power is controlled in 65%-70%, and heating and temperature control is at 170 DEG C -180
℃。
Comparative example：As shown in table 1, the method for this patent is not had in comparative example, to embody the superiority of method in patent, tool
Body result is as follows：
Test condition：Raw water NaCL1500ppm, operating pressure 150psi, the rate of recovery 15%.
Test for contamination：Raw water NaCL1000ppm, CaCL500ppm, COD10ppm, operating pressure 150psi, the rate of recovery
Tested after carrying out conventional alkali cleaning pickling after 15%, operation 24H.
Based on above-mentioned, it is an advantage of the current invention that doping increase hydroaropic substance can improve counter-infiltration in membrane material
The water-flowing amount of film, is modified by hydrophilic radical, under lower pressure operation, there is higher water flux, in higher water flux bar
Under part, antifouling property is higher, higher antifouling property, ensure that higher service life, overcoat and functional layer are led to
Chemical bonds the most stable are crossed, and reach good safeguard function and stability in use.
Finally it should be noted that：The preferred embodiment of the present invention is the foregoing is only, is not intended to limit the invention, to the greatest extent
The present invention is described in detail with reference to the foregoing embodiments for pipe, and for those skilled in the art, it still can be with
Technical scheme described in foregoing embodiments is modified, or equivalent substitution is carried out to which part technical characteristic.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc., it should be included in the guarantor of the present invention
Within the scope of shield.
Claims (7)
- A kind of 1. low-pressure high-throughput reverse osmosis membrane, it is characterised in that：The reverse osmosis membrane is prepared by following raw materials：Poly- virtue Sulfone, organic solvent, pore-foaming agent, non-woven fabrics, aromatic amine, deionized water, aroyl chloride, nitrous acid, polyethylene alcohol and water, above-mentioned original The parts by weight of material are：Polyarylsulfone (PAS) 20-30 parts, organic solvent 100-200 parts, pore-foaming agent 5-10 parts, non-woven fabrics 10-20 parts, fragrance Amine 3-15 parts, deionized water 100-200 parts, aroyl chloride 1-10 parts, nitrous acid 4-6 parts, polyvinyl alcohol 4-6 parts and pure water 100- 200 parts.
- A kind of 2. low-pressure high-throughput reverse osmosis membrane manufacture method, it is characterised in that：Comprise the following steps：1) supporter casting solution is prepared：First dispensing is carried out according to above-mentioned weight part ratio；Then by polyarylsulfone (PAS), organic solvent, pore Agent, into casting solution, is stirred by above-mentioned parts by weight, ultrasound degassing 10-30min after 12h is stood, as supporter casting film Liquid；Wherein casting solution concentration is 10-30%wt；2) support body layer is prepared：Casting solution made from step 1) is applied to after above-mentioned dispensing on non-woven fabrics using knifing machine, it is thick Spend for 10-150 μm, gel solidification film forming in 15-25 DEG C of deionized water is immersed after then evaporating 5-30s at room temperature, by normal temperature Wash, support body layer is made after 60-90 DEG C of hot water treatment；3) functional layer solution is prepared：The functional layer solution includes solution A and solution B, and the solute of the solution A is aromatic amine, Solvent is water, and concentration 5-20%wt, by aromatic amine and water after above-mentioned dispensing, mixing, the solute of the solution B is fragrance Acyl chlorides, solvent are organic solvent, concentration 5-20%wt, by aroyl chloride and organic solvent after above-mentioned dispensing, mixing；4) functional layer is prepared：It is then quiet at room temperature by 5-60s in support body layer surface elder generation dipping solution A made from step 2) Put 5-30s in 5-30s, then dipping solution B, after at room temperature stand reaction 1-10min produce functional layer；Then functional layer is used 0.1%-1% nitrous acid treatments 2-30min, you can；5) overcoat is prepared：The functional layer that step 4) treats is soaked into 1- by 0.1%-10% poly-vinyl alcohol solution 10min, then infrared heating processing 5-20min, last cooling combined formed produce reverse osmosis membrane.
- A kind of 3. low-pressure high-throughput reverse osmosis membrane according to claim 1, it is characterised in that：The organic solvent is purification Organic solvent afterwards, its purification system include：Heater, it is heated to mixed liquor；Seepage slope device, it, which is arranged at, adds The back segment of hot device, possess Pervaporation membrane, and organic solvent and water are separated；Kettle is evaporated under reduced pressure, wherein supplying from seepage slope The organic solvent of the concentration side recovery of device；And pipe arrangement, it supplies the organic solvent to gasify in kettle is evaporated under reduced pressure to heating Thermal source of the device as heater, its method of purification are：The heating process heated to the mixed liquor；Use seepage slope Film, the process that the mixed liquor by heating is separated into the organic solvent and the water；With make from the seepage slope The step of organic solvent of the concentration side recovery of film is evaporated under reduced pressure, wherein, it is evaporated under reduced pressure using by described and gasification The organic solvent is as the thermal source in the heating process.
- A kind of 4. low-pressure high-throughput reverse osmosis membrane according to claim 1, it is characterised in that：The preparation side of the pore-foaming agent Method is：A certain proportion of surfactant, inorganic salts and cosurfactant are added in monomer, then is added to together a certain amount of Distilled water in, stirring, emulsification, it is static obtain oil-in-water microemulsion, certain density water solubility is added in the microemulsion Initiator monomer, lead to N2Protection, mechanical agitation, heating, after carrying out polymerisation certain time, alkali lye is added dropwise in system, adjusts Section pH value is 8-10, obtain having certain hydrophilic lipophilic balance, particle diameter distribution be monodispersed, size range in 20- 500nm Porous materials of receiving prepare special pore-foaming agent.
- A kind of 5. low-pressure high-throughput reverse osmosis membrane according to claim 1, it is characterised in that：The non-woven fabrics it is main into It is divided into PET；The polyarylsulfone (PAS) includes polyarylsulfone (PAS), polyether sulphone, the one or more of polyether ethersulfone；Institute Stating aromatic amine includes m-phenylene diamine (MPD), o-phenylenediamine, the one or more of p-phenylenediamine；The aroyl chloride includes the equal formyl of benzene three Chlorine, paraphthaloyl chloride, simple phthalyl chloride, the one or more of o-phthaloyl chloride；The pore-foaming agent includes alcohols pore Agent and ethers pore-foaming agent.
- A kind of 6. low-pressure high-throughput reverse osmosis membrane manufacture method according to claim 2, it is characterised in that：It is described it is infrared plus Heat treatment is heated specifically by infrared heating device, and temperature rises the adhesive reached in activation sizing material, described Infrared heating device is made up of electric heating tube and power control unit, and different specification products has by infrared heating device Different speed, 5m/min-10m/ can be adjusted to by the speed of infrared heating device according to the product of different calibers Min, then adjust the power of heating tube, you can.
- A kind of 7. low-pressure high-throughput reverse osmosis membrane manufacture method according to claim 6, it is characterised in that：The heating work( Rate is controlled in 65%-70%, and heating and temperature control is at 170 DEG C -180 DEG C.
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| CN108452688A (en) * | 2018-04-13 | 2018-08-28 | 重庆海通环保科技有限公司 | A kind of novel reverse osmosis membrane and preparation method thereof |
| CN108499362A (en) * | 2018-04-13 | 2018-09-07 | 重庆海通环保科技有限公司 | High-performance reverse osmosis membrane and its manufacture craft |
| CN114534512A (en) * | 2022-03-01 | 2022-05-27 | 北京碧水源分离膜科技有限公司 | Preparation method and application of reverse osmosis membrane |
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| CN114534512A (en) * | 2022-03-01 | 2022-05-27 | 北京碧水源分离膜科技有限公司 | Preparation method and application of reverse osmosis membrane |
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