CN102886211A - Solvent-free preparation method of aperture controllable porous film - Google Patents
Solvent-free preparation method of aperture controllable porous film Download PDFInfo
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- CN102886211A CN102886211A CN2012103682126A CN201210368212A CN102886211A CN 102886211 A CN102886211 A CN 102886211A CN 2012103682126 A CN2012103682126 A CN 2012103682126A CN 201210368212 A CN201210368212 A CN 201210368212A CN 102886211 A CN102886211 A CN 102886211A
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Abstract
The invention discloses a solvent-free preparation method of an aperture controllable porous film. The process of the method comprises the following steps of: using 1-hydroxy-cyclohexyl phenyl ketone as an initiator, using hexanediol diacrylate as a cross-linking agent, and by ultraviolet light, initiating polymerization cross-linking curing film formation of a film forming monomer hydroxyethyl methacrylate and pore forming silicon dioxide nano particles between two glass sheets; and carrying out pore forming by removing a pore forming agent, i.e. the silicon dioxide particles. The method does not require an organic solvent in the preparation process, is green and has no pollution; and the solvent cost can be saved and a solvent recovery process is not required. The particle size of the prepared silicon dioxide nano particles can be regulated and controlled by the sol-gel process conditions; the aperture of the prepared porous film is consistent with the particle size of the pore forming agent, i.e. silicon dioxide nano particles; and the aperture of the film can be regulated and controlled by regulating the particle size of the silicon dioxide nano particles.
Description
Technical field
The present invention relates to the non-solvent preparation of the controlled perforated membrane in a kind of aperture, belong to the membrane separation technique field.
Background technology
Membrane preparation method (mainly being immersion precipitation phase inversion, solvent evaporated method etc.) commonly used all need use a large amount of organic solvents, effect aspect two below organic solvent mainly plays in the polymer film preparation process.On the one hand, solvent mixes formation homogeneous phase casting solution as dissolve medium with film forming polymer, various additive.On the other hand, the inversion of phases Solvent is formed with important function to the structure of film.In the immersion precipitation phase inversion, the exchange of solvent of organic solvent and non-solvent (water commonly used) has caused the generation of inversion of phases.The organic solvent that film-forming process is commonly used comprises DMF (DMF), DMA (DMAc), 1-METHYLPYRROLIDONE (NMP) etc.Film-forming process with an organic solvent has following shortcoming in a large number.At first, organic solvent is harmful to human body and environment.For example, DMF is often toxic to nervous system, respiratory system, liver and kidney, and skin is had spread effect, even reports that DMF can cause cancer and chromosome aberration.DMAc will cause the infringement of liver, causes toxic hepatitis.Occupational health standard (GBZ2-2002) the workplace harmful factors Exposed limit value stipulated time weighted average allowable concentration 20mg/m of country of the People's Republic of China (PRC)
3Secondly, cost with an organic solvent is higher.Because organic solvent shared mass ratio in casting solution is generally 60%-90%, cost is higher.The 3rd, the organic solvent recovery difficult is large.Organic solvent reclaims general adopt decompression distillation or rectifying recovery, because masking organic solvent boiling point is high, and organic solvent concentration low (being usually less than 8%) in the masking waste water, it is high to reclaim energy consumption, reclaims less economical.Simultaneously, because the bio-toxicity of organic solvent and relatively poor biodegradability, the processing of masking waste water is difficult also.
Permeability of the membrane and selective closely bound up with the aperture, borehole enlargement, then flux increases, but the aperture increase tends to cause elective reduction.Different separation mixtures, also often different to the requirement of different pore size.The micro-filtration membrane aperture〉100nm, can hold back suspended particulate in the feed liquid, bacterium, virus etc., the milipore filter aperture is 2-100nm, and decapacitation is held back outside suspended particulate in the feed liquid, bacterium, the virus, and protein, polypeptide also can be held back by milipore filter.Therefore, the membrane aperture regulation and control are most important for the Selective Separation that realizes film.
In sum, propose under the organic solvent-free condition, to prepare the technology of the controlled perforated membrane in aperture, tool most important theories meaning and using value.
Summary of the invention
The object of the present invention is to provide a kind of non-solvent preparation of controllable bore diameter perforated membrane, this preparation method's process is simple to operation, environmental protection, and prepared membrane aperture is adjustable.
The present invention is realized that by subordinate's technical scheme the non-solvent preparation of the controlled perforated membrane in a kind of aperture is characterized in that may further comprise the steps:
1) nano SiO 2 particle preparation process
With ethanol, deionized water and ammoniacal liquor is (160-400) by volume: 20:(3-10) join successively in the container, magnetic agitation 5-10min, ultrasonic processing 5-10min, and then constant temperature 20-50 ℃ and stir lower, (2-10): 20 ethyl orthosilicate, reaction 24-48h, again by with container in the deionized water volume ratio be (1-5): 20 3-(methacryloxypropyl) propyl trimethoxy silicane, reaction 24h adopts centrifugation 10min, and rotating speed is 10000rpm, the collection powder is put into 90 ℃ of baking ovens dries 24-48h, and getting diameter after the grinding is the nano SiO 2 particle of (50-300) nm;
2) reaction film forming and pore process
With pore-foaming agent nano SiO 2 particle (SiO in monomer methacrylic acid hydroxyl ethyl ester (HEMA), the step 1)
2); crosslinking agent 1; 6-hexanediyl ester (HDODA) and initator 1-hydroxy-cyclohexyl phenyl ketone (HCPK) be 1:(0.05-0.70 in mass ratio): 0.08:0.01 mixes; under nitrogen protection to casting solution with ultrasonic processing 2-10 minute; get casting solution and drop in first piece sheet one end; live casting solution on first block of sheet glass with an end cap of second block of sheet glass; second block of sheet glass of translation overlaps two sheet glass sheets; casting solution is sprawled the formation liquid film between two sheet glass sheets; two sheet glass sheets are placed ultraviolet lighting processing 1-3min under the 200W high-pressure sodium lamp; then strip off two sheet glass sheets; it is in 1% the hydrofluoric acid that the sheet glass that will adhere to solid film immerses mass fraction; solid film is peeled off from sheet glass automatically; and it is transferred to mass fraction is to soak 0.5-4h in 10% the hydrofluoric acid; again solid film is transferred in the ethanol and washs; be immersed at last 12-24h in the deionized water, obtain the controlled perforated membrane in aperture.
The invention has the advantages that: with respect to conventional method, the method preparation process need not organic solvent, green non-pollution; Can save solvent cost, so can reduce the masking cost; Need not simultaneously the solvent recovery process, reduce equipment investment and energy consumption.Do the template pore with nano SiO 2 particle, the controlled and homogeneous comparatively in aperture, porosity is controlled, can adapt to different separation mixtures.Material of preparing is cheap and easy to get, and the film preparation process is simple, and mild condition is easy to amplify.
Description of drawings
Fig. 1 is the surface scan electromicroscopic photograph of the made film 3 of the embodiment of the invention 3.
Fig. 2 is that the made membrane flux of the embodiment of the invention is with nano SiO 2 particle average grain diameter change curve.
Fig. 3 is the made film of the embodiment of the invention to the rejection of saccharomycete, bovine serum albumin with nano SiO 2 particle average grain diameter change curve.
The specific embodiment
Embodiment 1
Measure 300mL ethanol, 20mL deionized water and 3.5mL ammoniacal liquor join in the dry round-bottomed flask of cleaning successively, magnetic agitation 5min, ultrasonic processing 5min, 30 ℃ of lower 10min that stir of constant temperature add the 5mL ethyl orthosilicate, reaction 24h, add again 1mL3-(methacryloxypropyl) propyl trimethoxy silicane, reaction 24h adopts centrifugation 10min, and rotating speed is 10000rpm, the collection powder is put into 90 ℃ of baking ovens dries 48h, gets nano SiO 2 particle after the grinding.
Take by weighing monomer methacrylic acid hydroxyl ethyl ester 1.0g; above-mentioned nano SiO 2 particle 320mg, crosslinking agent 1; 6-hexanediyl ester 80mg and initator 1-hydroxy-cyclohexyl phenyl ketone 10mg, the mixed preparing casting solution, under nitrogen protection to casting solution with ultrasonic processing 5min.The casting solution of measuring volume and be 50 μ L drops in first piece sheet (75mm*25mm) end, live casting solution on first block of sheet glass with an end cap of second block of sheet glass (75mm*25mm), second block of sheet glass of translation overlaps two sheet glass sheets, and casting solution is sprawled the formation liquid film between two sheet glass sheets.The two sheet glass sheets that accompany liquid film are placed ultraviolet lighting 1min under the 200W high-pressure sodium lamp, take out cool to room temperature.It is that solid film is peeled off from sheet glass automatically in 1% the hydrofluoric acid that strip off two sheet glass sheets, the sheet glass that has adhered to solid film immerse mass fraction, and it is transferred to mass fraction is to soak 1h in 10% the hydrofluoric acid.Again solid film is transferred in the ethanol and washs three times, be immersed at last 24h in the deionized water, obtain film 1.
By transmission electron microscope photo as can be known prepared nano SiO 2 particle average grain diameter be about 65nm, particle diameter is homogeneous comparatively.Prepared film 1 average pore size is consistent with the nano SiO 2 particle average grain diameter as can be known by stereoscan photograph, the pore size homogeneous, and namely membrane aperture is controlled by the pore-foaming agent silica dioxide granule.Prepared film 1 is 126.7L/ (m at water flux
2H), the saccharomycete rejection is 99.8%, and the bovine serum albumin rejection is 43.7%.
Embodiment 2
Measure 200mL ethanol, 20mL deionized water and 5mL ammoniacal liquor join in the dry round-bottomed flask of cleaning successively, magnetic agitation 5min, ultrasonic processing 5min, 40 ℃ of lower 10min that stir of constant temperature add the 5mL ethyl orthosilicate, reaction 24h, add again 1mL3-(methacryloxypropyl) propyl trimethoxy silicane, reaction 24h adopts centrifugation 10min, and rotating speed is 10000rpm, the collection powder is put into 90 ℃ of baking ovens dries 48h, gets nano SiO 2 particle after the grinding.
Take by weighing monomer methacrylic acid hydroxyl ethyl ester 1.0g; above-mentioned nano SiO 2 particle 320mg, crosslinking agent 1; 6-hexanediyl ester 80mg and initator 1-hydroxy-cyclohexyl phenyl ketone 10mg, the mixed preparing casting solution, under nitrogen protection to casting solution with ultrasonic processing 5min.The casting solution of measuring volume and be 50 μ L drops in first piece sheet (75mm*25mm) end, live casting solution on first block of sheet glass with an end cap of second block of sheet glass (75mm*25mm), second block of sheet glass of translation overlaps two sheet glass sheets, and casting solution is sprawled the formation liquid film between two sheet glass sheets.The two sheet glass sheets that accompany liquid film are placed ultraviolet lighting 1min under the 200W high-pressure sodium lamp, take out cool to room temperature.It is that solid film is peeled off from sheet glass automatically in 1% the hydrofluoric acid that strip off two sheet glass sheets, the sheet glass that has adhered to solid film immerse mass fraction, and it is transferred to mass fraction is to soak 1h in 10% the hydrofluoric acid.Again solid film is transferred in the ethanol and washs three times, be immersed at last 24h in the deionized water, obtain film 2.
By transmission electron microscope photo as can be known prepared nano SiO 2 particle average grain diameter be about 85nm, particle diameter is homogeneous comparatively.Prepared film 2 average pore sizes are consistent with the nano SiO 2 particle average grain diameter as can be known by stereoscan photograph, the pore size homogeneous, and namely membrane aperture is controlled by the pore-foaming agent silica dioxide granule.Prepared film 2 is 233.4L/ (m at water flux
2H), the saccharomycete rejection is 99.8%, and the bovine serum albumin rejection is 32.7%.
Embodiment 3
Measure 200mL ethanol, 20mL deionized water and 5mL ammoniacal liquor join in the dry round-bottomed flask of cleaning successively, magnetic agitation 5min, ultrasonic processing 5min, 40 ℃ of lower 10min that stir of constant temperature add the 2.5mL ethyl orthosilicate, reaction 24h, add again 1mL3-(methacryloxypropyl) propyl trimethoxy silicane, reaction 24h adopts centrifugation 10min, and rotating speed is 10000rpm, the collection powder is put into 90 ℃ of baking ovens dries 48h, gets nano SiO 2 particle after the grinding.
Take by weighing monomer methacrylic acid hydroxyl ethyl ester 1.0g; above-mentioned nano SiO 2 particle 320mg, crosslinking agent 1; 6-hexanediyl ester 80mg and initator 1-hydroxy-cyclohexyl phenyl ketone 10mg, the mixed preparing casting solution, under nitrogen protection to casting solution with ultrasonic processing 5min.The casting solution of measuring volume and be 50 μ L drops in first piece sheet (75mm*25mm) end, live casting solution on first block of sheet glass with an end cap of second block of sheet glass (75mm*25mm), second block of sheet glass of translation overlaps two sheet glass sheets, and casting solution is sprawled the formation liquid film between two sheet glass sheets.The two sheet glass sheets that accompany liquid film are placed ultraviolet lighting 1min under the 200W high-pressure sodium lamp, take out cool to room temperature.It is that solid film is peeled off from sheet glass automatically in 1% the hydrofluoric acid that strip off two sheet glass sheets, the sheet glass that has adhered to solid film immerse mass fraction, and it is transferred to mass fraction is to soak 1h in 10% the hydrofluoric acid.Again solid film is transferred in the ethanol and washs three times, be immersed at last 24h in the deionized water, obtain film 3.
By transmission electron microscope photo as can be known prepared nano SiO 2 particle average grain diameter be about 105nm, particle diameter is homogeneous comparatively.Prepared film 3 average pore sizes are consistent with the nano SiO 2 particle average grain diameter as can be known by stereoscan photograph, the pore size homogeneous, and namely membrane aperture is controlled by the pore-foaming agent silica dioxide granule.Prepared film 3 is 387.2L/ (m at water flux
2H), the saccharomycete rejection is 99.7%, and the bovine serum albumin rejection is 10.3%.
Embodiment 4
Measure 160mL ethanol, 20mL deionized water and 5mL ammoniacal liquor join in the dry round-bottomed flask of cleaning successively, magnetic agitation 5min, ultrasonic processing 5min, 30 ℃ of lower 10min that stir of constant temperature add the 5mL ethyl orthosilicate, reaction 24h, add again 1mL3-(methacryloxypropyl) propyl trimethoxy silicane, reaction 24h adopts centrifugation 10min, and rotating speed is 10000rpm, the collection powder is put into 90 ℃ of baking ovens dries 48h, gets nano SiO 2 particle after the grinding.
Take by weighing monomer methacrylic acid hydroxyl ethyl ester 1.0g; above-mentioned nano SiO 2 particle 320mg, crosslinking agent 1; 6-hexanediyl ester 80mg and initator 1-hydroxy-cyclohexyl phenyl ketone 10mg, the mixed preparing casting solution, under nitrogen protection to casting solution with ultrasonic processing 5min.The casting solution of measuring volume and be 50 μ L drops in first piece sheet (75mm*25mm) end, live casting solution on first block of sheet glass with an end cap of second block of sheet glass (75mm*25mm), second block of sheet glass of translation overlaps two sheet glass sheets, and casting solution is sprawled the formation liquid film between two sheet glass sheets.The two sheet glass sheets that accompany liquid film are placed ultraviolet lighting 1min under the 200W high-pressure sodium lamp, take out cool to room temperature.It is that solid film is peeled off from sheet glass automatically in 1% the hydrofluoric acid that strip off two sheet glass sheets, the sheet glass that has adhered to solid film immerse mass fraction, and it is transferred to mass fraction is to soak 1h in 10% the hydrofluoric acid.Again solid film is transferred in the ethanol and washs three times, be immersed at last 24h in the deionized water, obtain film 4.
By transmission electron microscope photo as can be known prepared nano SiO 2 particle average grain diameter be about 135nm, particle diameter is homogeneous comparatively.Prepared film 4 average pore sizes are consistent with the nano SiO 2 particle average grain diameter as can be known by stereoscan photograph, the pore size homogeneous, and namely membrane aperture is controlled by the pore-foaming agent silica dioxide granule.Prepared film 4 is 521.3L/ (m at water flux
2H), the saccharomycete rejection is 99.6%, and the bovine serum albumin rejection is 2.2%.
Embodiment 5
Measure 200mL ethanol, 20mL deionized water and 7mL ammoniacal liquor join in the dry round-bottomed flask of cleaning successively, magnetic agitation 5min, ultrasonic processing 5min, 30 ℃ of lower 10min that stir of constant temperature add the 5mL ethyl orthosilicate, reaction 24h, add again 1mL3-(methacryloxypropyl) propyl trimethoxy silicane, reaction 24h adopts centrifugation 10min, and rotating speed is 10000rpm, the collection powder is put into 90 ℃ of baking ovens dries 48h, gets nano SiO 2 particle after the grinding.
Take by weighing monomer methacrylic acid hydroxyl ethyl ester 1.0g; above-mentioned nano SiO 2 particle 320mg, crosslinking agent 1; 6-hexanediyl ester 80mg and initator 1-hydroxy-cyclohexyl phenyl ketone 10mg, the mixed preparing casting solution, under nitrogen protection to the ultrasonic processing of casting solution 5min.The casting solution of measuring volume and be 50 μ L drops in first piece sheet (75mm*25mm) end, live casting solution on first block of sheet glass with an end cap of second block of sheet glass (75mm*25mm), second block of sheet glass of translation overlaps two sheet glass sheets, and casting solution is sprawled the formation liquid film between two sheet glass sheets.The two sheet glass sheets that accompany liquid film are placed ultraviolet lighting 1min under the 200W high-pressure sodium lamp, take out cool to room temperature.It is that solid film is peeled off from sheet glass automatically in 1% the hydrofluoric acid that strip off two sheet glass sheets, the sheet glass that has adhered to solid film immerse mass fraction, and it is transferred to mass fraction is to soak 1h in 10% the hydrofluoric acid.Again solid film is transferred in the ethanol and washs three times, be immersed at last 24h in the deionized water, obtain film 5.
By transmission electron microscope photo as can be known prepared nano SiO 2 particle average grain diameter be about 200nm, particle diameter is homogeneous comparatively.Prepared film 5 average pore sizes are consistent with the nano SiO 2 particle average grain diameter as can be known by stereoscan photograph, the pore size homogeneous, and namely membrane aperture is controlled by the pore-foaming agent silica dioxide granule.Prepared film 5 is 732.2L/ (m at water flux
2H), the saccharomycete rejection is 99.7%, and the bovine serum albumin rejection is 1.4%.
Comparative Examples 1
The comparative film that the present invention selects is the super strong type series filter membrane of Shanghai close granulosa isolation technics Co., Ltd, and its material is made from mixed materials, and main component is cellulose acetate, and the aperture is 0.22 μ m, and diameter is 50mm.The water flux of comparative film is 1256.0L/ (m
2H), the saccharomycete rejection is 99.8%, and the bovine serum albumin rejection is 1.0%.
The performance of the prepared temperature-responsive film of embodiment of the invention film and the Performance Ratio of comparative film are classified table 1 as.
Table 1
Claims (1)
1. the non-solvent preparation of the controlled perforated membrane in aperture is characterized in that may further comprise the steps:
1) nano SiO 2 particle preparation process
With ethanol, deionized water and ammoniacal liquor is (160-400) by volume: 20:(3-10) join successively in the container, magnetic agitation 5-10min, ultrasonic processing 5-10min, and then constant temperature 20-50 ℃ and stir lower, (2-10): 20 ethyl orthosilicate, reaction 24-48h, again by with container in the deionized water volume ratio be (1-5): 20 3-(methacryloxypropyl) propyl trimethoxy silicane, reaction 24h adopts centrifugation 10min, and rotating speed is 10000rpm, the collection powder is put into 90 ℃ of baking ovens dries 24-48h, and getting diameter after the grinding is the nano SiO 2 particle of (50-300) nm;
2) reaction film forming and pore process
With monomer methacrylic acid hydroxyl ethyl ester; pore-foaming agent nano SiO 2 particle in the step 1); crosslinking agent 1; 6-hexanediyl ester and initator 1-hydroxy-cyclohexyl phenyl ketone be 1:(0.05-0.70 in mass ratio): 0.08:0.01 mixes; under nitrogen protection to casting solution with ultrasonic processing 2-10 minute; get casting solution and drop in first piece sheet one end; live casting solution on first block of sheet glass with an end cap of second block of sheet glass; second block of sheet glass of translation overlaps two sheet glass sheets; casting solution is sprawled the formation liquid film between two sheet glass sheets; two sheet glass sheets are placed ultraviolet lighting processing 1-3min under the 200W high-pressure sodium lamp; then strip off two sheet glass sheets; it is in 1% the hydrofluoric acid that the sheet glass that will adhere to solid film immerses mass fraction; solid film is peeled off from sheet glass automatically; and it is transferred to mass fraction is to soak 0.5-4h in 10% the hydrofluoric acid; again solid film is transferred in the ethanol and washs; be immersed at last 12-24h in the deionized water, obtain the controlled perforated membrane in aperture.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103295881A (en) * | 2013-06-04 | 2013-09-11 | 上海华力微电子有限公司 | Method for removing low-k dielectric materials on surfaces of silicon wafers |
| CN106084277A (en) * | 2016-06-17 | 2016-11-09 | 江苏科技大学 | A kind of porous material of split-phase synthesis and preparation method thereof |
| CN106823843A (en) * | 2017-01-13 | 2017-06-13 | 常州大学 | A kind of regulation and control method of new silica membrane aperture and its application |
| CN109674770A (en) * | 2019-02-18 | 2019-04-26 | 上海交通大学 | A kind of release-controlled film and the preparation method and application thereof of controllable polypeptide drug release |
| CN114300807A (en) * | 2021-12-19 | 2022-04-08 | 上海凯矜新材料科技有限公司 | Preparation method of lithium battery diaphragm |
| CN114917776A (en) * | 2022-06-17 | 2022-08-19 | 江苏拓邦环保科技有限公司 | High-flux antibacterial reverse osmosis membrane and preparation method and application thereof |
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| CN114300807A (en) * | 2021-12-19 | 2022-04-08 | 上海凯矜新材料科技有限公司 | Preparation method of lithium battery diaphragm |
| CN114917776A (en) * | 2022-06-17 | 2022-08-19 | 江苏拓邦环保科技有限公司 | High-flux antibacterial reverse osmosis membrane and preparation method and application thereof |
| CN114917776B (en) * | 2022-06-17 | 2023-06-20 | 江苏拓邦环保科技有限公司 | High-flux antibacterial reverse osmosis membrane and preparation method and application thereof |
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Application publication date: 20130123 |