CN1562451A - Crossblend separation membrane for polyvinyl chloride in high pass quantity and preparation method - Google Patents
Crossblend separation membrane for polyvinyl chloride in high pass quantity and preparation method Download PDFInfo
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- CN1562451A CN1562451A CN 200410029758 CN200410029758A CN1562451A CN 1562451 A CN1562451 A CN 1562451A CN 200410029758 CN200410029758 CN 200410029758 CN 200410029758 A CN200410029758 A CN 200410029758A CN 1562451 A CN1562451 A CN 1562451A
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- 229920000915 polyvinyl chloride Polymers 0.000 title claims description 57
- 239000004800 polyvinyl chloride Substances 0.000 title claims description 46
- 238000002360 preparation method Methods 0.000 title claims description 15
- 239000012528 membrane Substances 0.000 title abstract description 9
- 238000000926 separation method Methods 0.000 title description 4
- 239000000203 mixture Substances 0.000 claims abstract description 38
- 239000000654 additive Substances 0.000 claims abstract description 11
- 230000000996 additive effect Effects 0.000 claims abstract description 11
- 238000001704 evaporation Methods 0.000 claims abstract description 11
- 239000003960 organic solvent Substances 0.000 claims abstract description 8
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 claims description 54
- 229920000642 polymer Polymers 0.000 claims description 31
- 229920002554 vinyl polymer Polymers 0.000 claims description 27
- 230000004907 flux Effects 0.000 claims description 22
- 238000005266 casting Methods 0.000 claims description 18
- 238000005345 coagulation Methods 0.000 claims description 16
- 230000015271 coagulation Effects 0.000 claims description 16
- 230000004888 barrier function Effects 0.000 claims description 15
- 238000009792 diffusion process Methods 0.000 claims description 15
- -1 polychloroethylene Polymers 0.000 claims description 14
- 230000008020 evaporation Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 6
- 239000006259 organic additive Substances 0.000 claims description 5
- 238000011417 postcuring Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 230000032683 aging Effects 0.000 abstract description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 abstract 1
- 229920002451 polyvinyl alcohol Polymers 0.000 abstract 1
- 238000010345 tape casting Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 229920001577 copolymer Polymers 0.000 description 16
- 125000003342 alkenyl group Chemical group 0.000 description 15
- 229910052799 carbon Inorganic materials 0.000 description 15
- 239000011521 glass Substances 0.000 description 10
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 7
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 230000010148 water-pollination Effects 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 239000012153 distilled water Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- WFKAJVHLWXSISD-UHFFFAOYSA-N isobutyramide Chemical compound CC(C)C(N)=O WFKAJVHLWXSISD-UHFFFAOYSA-N 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 4
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 4
- 239000002202 Polyethylene glycol Substances 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229920001223 polyethylene glycol Polymers 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 238000000108 ultra-filtration Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 108091003079 Bovine Serum Albumin Proteins 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 229940098773 bovine serum albumin Drugs 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000007716 flux method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 2
- 229920002959 polymer blend Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 241001643084 Cyrtanthus elatus virus A Species 0.000 description 1
- 229920002307 Dextran Polymers 0.000 description 1
- 108010058846 Ovalbumin Proteins 0.000 description 1
- 102000057297 Pepsin A Human genes 0.000 description 1
- 108090000284 Pepsin A Proteins 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- GLLRIXZGBQOFLM-UHFFFAOYSA-N Xanthorin Natural products C1=C(C)C=C2C(=O)C3=C(O)C(OC)=CC(O)=C3C(=O)C2=C1O GLLRIXZGBQOFLM-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000006136 alcoholysis reaction Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 230000021523 carboxylation Effects 0.000 description 1
- 238000006473 carboxylation reaction Methods 0.000 description 1
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229940092253 ovalbumin Drugs 0.000 description 1
- 229940111202 pepsin Drugs 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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- Manufacture Of Macromolecular Shaped Articles (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A high-throughness separating PVC mixture membrane with high hydrophilicity is prepared through proportionally dissolving the polyvinyl alcohol, alkoholyzed halogene-fatty-acid-ene and PVC in organic solvent, adding additive, dissolving, ageing, doctor blading to form membrane, evaporating, and automatic stripping in gel bath.
Description
Technical field
Polychloroethylene blended diffusion barrier of high flux and preparation method thereof belongs to a kind of preparation field of organic separation membrane.
Background technology
Polyvinyl chloride (PVC) is traditional macromolecular material that a kind of chemical stability is good, mechanical strength is high, in China stable industrialization product is arranged, and just having obtained enough attention from China's film early stage of development, advantages such as its cheap price, strong resistance to acids and bases make it obtain development widely in the membrane separation technique field.But PVC material hydrophily is relatively poor, and the film separative efficiency of making is lower, and contamination resistance is also relatively poor.Being usually used in improving the hydrophilic method of PVC film at present is to allow PVC and other hydrophilic macromolecule organic matter blend, the blend of report both at home and abroad has vinyl chloride-vinyl acetate (VC-co-VAC) (≠ Sun Bin, Yang Yong, the research of .PVC/VC-co-VAC alloy films such as Song Yujun, the 6th extraordinary applied chemistry academic discussion thesis summary set, Beijing: Chinese Chemical Society, 1997,177-185. ≡ Ma Xingfa, Wei Liping, .PVC/CEVA co-mixing system Study on Compatibility such as Wu Chong light. polymer material science and engineering, 1996,12 (2): 136-138. ≈ Bodzek M, Konieczny K.Theinfluence of molecular mass of poly (vinyl chloride) on the structure and transport characteristicsof ultrafiltration membranes.Membrane Sciences.1991,61:131-156.), polymethyl methacrylate (PMMA), polyethylene-acrylonitrile copolymer (SAN), isobutene-copolymer-maleic anhydride (IB-CO-MIL), polyacrylonitrile (PAN), carboxylation polyvinyl chloride (CPVC), polyvinylpyrrolidones (PVP) etc. make the milipore filter that is used under the different condition respectively.Adopt the film of these materials and polychloroethylene blended preparation all to improve the hydrophily of PVC film in varying degrees, but the overall performance of film (pure water flux is higher under the situation that the rejection of primary standard substance is equated) all be not so good as the PVC/ polyvinyl acetaldehyde high polymer blend film that the present invention prepares.As in above report, the film properties of PVC/PVP blend is best, and under 95% condition, pure water flux is 658ml/cm to the bovine serum albumin rejection
2HMPa; And under to bovine serum albumin rejection the same terms, PVC/ polyvinyl acetaldehyde high polymer blend film pure water flux of the present invention can reach 800ml/cm
2HMpa.The alcoholysate blend film pure water flux of PVC/ alkenyl halide-low-carbon ester copolymer can reach 1000ml/cm
2HMPa.(P.Rameh.Babu，V.G.Galkar.Preparation，Structure，and?Transport?Propertiesof?Ultrafiltration?Menbrane?of?poly(vinly?chloride)(PVC)?and?Poly(vinylpyrrolidone)Blends.Appl?polym?Sci?1999，73：1117-1130.)。
Summary of the invention
The present invention adopts two class hydrophilies strong, and the macromolecular material good with the polyvinyl chloride compatibility prepares high performance polychloroethylene blended film.
The technical solution adopted in the present invention is: the alcoholysate with polyvinyl acetaldehyde high polymer or alkenyl halide-low-carbon ester copolymer is dissolved in organic solvent altogether as second polymer and polyvinyl chloride respectively, control certain film forming condition, i.e. the structure of casting solution (composition of casting solution and content); Evaporation time and temperature, relative air humidity; Conditions such as coagulation bath temperature and composition, the blending isolation film of preparation PSPP, different flux.
The polychloroethylene blended diffusion barrier of high flux provided by the invention, it is characterized in that, it by the alcoholysate of polyvinyl acetaldehyde high polymer or alkenyl halide-low-carbon ester copolymer and polyvinyl chloride with mass ratio 1: 9-9: 1 to be dissolved in mass percent altogether be the 66%-87% organic solvent, add the inorganic additive of mass percent 0.01%-8% or the organic additive dissolving of mass percent 1%-20% again and obtain putting into coagulation bath after blend solution post curing, casting film-forming, the evaporation, obtain the polychloroethylene blended diffusion barrier of high flux of the present invention after peeling off automatically.
The preparation method of the above-mentioned polychloroethylene blended diffusion barrier of high flux is characterized in that it may further comprise the steps:
(1), the alcoholysate of polyvinyl acetaldehyde high polymer or alkenyl halide-low-carbon ester copolymer and polyvinyl chloride be with mass ratio 1: 9-9: 1 to be dissolved in mass percent altogether be the 66%-87% organic solvent, adds the inorganic additive of mass percent 0.01%-8% or the organic additive dissolving of mass percent 1%-20% again and obtain blend solution;
(2), with above-mentioned blend solution according to common process slaking 2-3 days, 15 ℃-30 ℃ of system film room temperatures, the casting solution temperature is 20 ℃-80 ℃, casting film-forming under the condition of relative air humidity 50-80%;
(3), with putting into 0 ℃ of-50 ℃ of coagulation bath of temperature behind the above-mentioned film evaporation 5-150s, obtain the polychloroethylene blended diffusion barrier of high flux of the present invention after peeling off automatically.
Organic solvent described in the step (1) is alcohols, acetone, benzene, toluene, chloroform, N, dinethylformamide (DMF), N, N-dimethylacetylamide (DMAC) etc.
Inorganic additive described in the step (1) such as Li salt, Ca salt, ammonium salt etc., organic additive such as polyvinylpyrrolidone (PVP), polyethylene glycol (PEG), n-butanol etc.
Coagulation bath composition described in the step (3) has water, NaCl, ethanol etc.
Above composition all is conventional ingredients of the preparation of this area organic separation membrane.
Polyvinyl acetaldehyde high polymer of the present invention has good solubility, the polyvinyl acetaldehyde high polymer is soluble in alcohols, acetone, benzene, toluene, chloroform, N, dinethylformamide (DMF), N, N-dimethylacetylamide organic solvents such as (DMAC); While polyvinyl acetaldehyde high polymer is also nontoxic, nothing is smelt, and has good insulation performance, film forming and impact resistance, UV resistant, oil resistant, ageing-resistant, low temperature resistant, function admirable.There is part hydrophilic radical hydroxyl in the polyvinyl acetaldehyde high-polymer molecular, with the polyvinyl acetaldehyde high polymer PVC is carried out modification, (PVC/ polyvinyl acetaldehyde polyblend is that Tg is between the Tg of two pure components by the glass transition temperature method, and Tg has certain skew, to a certain degree compatible arranged in the explanation system, is the compatible system of part.) to measure PVC/ polyvinyl acetaldehyde polyblend be 1: 9-9: all have good compatibility in 1 scope.Polyvinyl acetaldehyde high polymer and PVC blend can improve the hydrophily of PVC film, and contact angle is reduced to 40 ° by 78 °, and make the higher blended ultrafiltration membrane of molecular cut off 1,000 to 110,000 flux.
The alcoholysate of alkenyl halide-low-carbon ester copolymer that the present invention is used is because the alcoholysis effect, on the halogenebe-fattyene molecule, add one-OH, its hydrophily is strengthened to some extent than halogenebe-fattyene, (this solution is tangible " sea-island structure " to adopt the microscopic examination method, promptly one is continuous phase mutually, another is scattered in the continuous phase mutually, the alcoholysate that PVC and alkenyl halide-low-carbon ester copolymer is described is the compatible system of part .) etc. method measure PVC/ alkenyl halide-low-carbon ester copolymer the alcoholysate co-mixing system 1: 9-9: also have good compatibility in 1 scope, thereby improve the hydrophily (contact angle is reduced to 41 ° by 78 °) of hydrophobicity PVC film effectively, and make the blend ultrafiltration milipore filter of molecular cut off 10,000 to 50,000.
The present invention under identical rejection condition, can obtain bigger pure water flux, the better performances of film compared with the prior art.
The specific embodiment
The preparation of embodiment 1 medium molecular cut off PVC/ polyvinyl acetaldehyde high polymer diffusion barrier
Get 7gPVC, 7g polyvinyl acetaldehyde high polymer is dissolved in 78g N, and dinethylformamide (DMF) solvent is mixed with blend solution.After treating that polymer all dissolves, add 8gLi salt as additive, the agitating heating dissolving.Blend solution was placed in the baking oven slaking 2 days, 20 ℃ of casting solution temperature, under the condition of 15 ℃ of room temperatures, humidity 80%, casting film-forming on the glass plate of cleaning, evaporation time 10S puts it in the coagulation bath afterwards immediately, the coagulation bath composition is a water, bathe 20 ℃ of temperature, behind the film automatic stripping glass plate, put into distilled water and soak to be measured.Pure PVC and pure polyvinyl acetaldehyde high polymer one pack system Tg are respectively 85.5 ℃ and 57.9 ℃, when PVC/ polyvinyl acetaldehyde high polymer is 5: 5 ratio blend, two Tg appear, it is 84.1 ℃ and 61.4 ℃, Tg has certain skew, to a certain degree compatible arranged in the explanation system, is the compatible system of part.
In 25 ℃ of room temperatures, humidity 80%, under the condition of pressure 0.2MPa, the pure water flux W=408.5ml/cm of mensuration
2HMPa.Similarity condition is measured rejection down, records pepsin molecular weight=36000 rejection R=90.17% with ultraviolet specrophotometer (HP8451A of Hewlett-Packard type), so retaining molecular weight is 36,000.The PVC contact angle is reduced to 45 ° by 78 °.
The preparation of embodiment 2 low catching molecular PVC/ polyvinyl acetaldehyde high polymer diffusion barriers
Get 1.8gPVC, 16.2g polyvinyl acetaldehyde high polymer is dissolved in 81.99g N-methyl pyrrolidone (NMP) solvent and is mixed with blend solution.After treating that polymer all dissolves, add 0.01gLi salt as additive, the agitating heating dissolving.Blend solution was placed in the baking oven slaking 3 days, 80 ℃ of casting solution temperature, under the condition of 30 ℃ of room temperatures, humidity 50%, casting film-forming on the glass plate of cleaning, evaporation time 5S puts it in the coagulation bath afterwards immediately, the coagulation bath composition is NaCl, bathe 5 ℃ of temperature, behind the film automatic stripping glass plate, put into distilled water and soak to be measured.Pure PVC and pure polyvinyl acetaldehyde high polymer one pack system Tg are respectively 85.5 ℃ and 57.9 ℃, when PVC/ polyvinyl acetaldehyde high polymer is 1: 9 ratio blend, two Tg appear, it is 81.4 ℃ and 58.2 ℃, Tg has certain skew, to a certain degree compatible arranged in the explanation system, is the compatible system of part.
In 25 ℃ of room temperatures, humidity 50%, under the condition of pressure 0.2MPa, the pure water flux W=2.35ml/cm of mensuration
2HMPa.Similarity condition is measured rejection down, records Cobastab with ultraviolet specrophotometer
12Molecular weight=1350 rejection R=90.25% is so retaining molecular weight is 1350.The PVC contact angle is reduced to 40 ° by 78 °.
The preparation of embodiment 3 high molecular cut off PVC/ polyvinyl acetaldehyde high polymer diffusion barriers
Get 9.0gPVC, 1.0g polyvinyl acetaldehyde high polymer is dissolved in 87g N, and N-dimethylacetylamide (DMAC) solvent is mixed with blend solution.After treating that polymer all dissolves, add 3g polyvinylpyrrolidone PVP as additive, the agitating heating dissolving.Blend solution was placed in the baking oven slaking 3 days, 40 ℃ of casting solution temperature, under the condition of 25 ℃ of room temperatures, humidity 62%, casting film-forming on the glass plate of cleaning, evaporation time 150S puts it in the coagulation bath afterwards immediately, the coagulation bath composition is a water, bathe 30 ℃ of temperature, behind the film automatic stripping glass plate, put into distilled water and soak to be measured.Pure PVC and pure polyvinyl acetaldehyde high polymer one pack system Tg are respectively 85.5 ℃ and 57.9 ℃, when PVC/ polyvinyl acetaldehyde high polymer is 9: 1 ratio blend, a Tg occurs, are 84.9 ℃, and Tg has certain skew, and explanation is complete compatible system.
In 25 ℃ of room temperatures, humidity 65%, under the condition of pressure 0.2MPa, the pure water flux W=2676.05ml/cm of mensuration
2HMPa.Similarity condition is measured rejection down, records dextran molecule amount=110000 rejection R=90.57% with ultraviolet specrophotometer, so retaining molecular weight is 110,000.The PVC contact angle is reduced to 52 ° by 78 °.
The preparation of the alcoholysate diffusion barrier of embodiment 4 low catching molecular PVC/ alkenyl halide-low-carbon ester copolymers
Get 1.6gPVC, the alcoholysate of 14.4g alkenyl halide-low-carbon ester copolymer is dissolved in 83gN, and N-dimethylacetylamide (DMAC) solvent is mixed with blend solution.After treating that polymer all dissolves, add the 1g n-butanol as additive, the agitating heating dissolving.Blend solution was placed in the baking oven slaking 2 days, 50 ℃ of casting solution temperature, under the condition of 25 ℃ of room temperatures, humidity 75%, casting film-forming on the glass plate of cleaning, evaporation time 20S puts it in the coagulation bath afterwards immediately, the coagulation bath composition is a water, bathe 50 ℃ of temperature, behind the film automatic stripping glass plate, put into distilled water and soak to be measured.Be dispersed in the continuous phase based on PVC based on the decentralized photo of the alcoholysate of alkenyl halide-low-carbon ester copolymer in this blend solution, though it is the compatible system of part that the alcoholysate of PVC and alkenyl halide-low-carbon ester copolymer is described. two systems have the phenomenon of phase separation particle less, distribute also is that compatibility is better between polymer uniformly.
In 25 ℃ of room temperatures, humidity 75%, under the condition of pressure 0.2MPa, the pure water flux W=170.21ml/cm of mensuration
2HMPa.With measuring rejection under the sampling device condition, record pair cell pigment C=12500 rejection R=90.27% with ultraviolet specrophotometer, so retaining molecular weight is 12500.The PVC contact angle is reduced to 50 ° by 78 °.
The preparation of the alcoholysate diffusion barrier of embodiment 5 medium molecular cut off PVC/ alkenyl halide-low-carbon ester copolymers
Get 12.6gPVC, the alcoholysate of 1.4g alkenyl halide-low-carbon ester copolymer is dissolved in 66gN, and N-dimethylacetylamide (DMAC) solvent is mixed with blend solution.After treating that polymer all dissolves, add 10g polyethylene glycol (PEG) and 10g methyl alcohol as additive, the agitating heating dissolving.Blend solution was placed in the baking oven slaking 3 days, 30 ℃ of casting solution temperature, under the condition of 25 ℃ of room temperatures, humidity 70%, casting film-forming on the glass plate of cleaning, evaporation time 15S puts it in the coagulation bath afterwards immediately, the coagulation bath composition is a water, bathe 20 ℃ of temperature, behind the film automatic stripping glass plate, put into distilled water and soak to be measured.Be dispersed in the continuous phase based on the alcoholysate of alkenyl halide-low-carbon ester copolymer based on the decentralized photo of PVC in this blend solution, though it is the compatible system of part that the alcoholysate of PVC and alkenyl halide-low-carbon ester copolymer is described. two systems have the phenomenon of phase separation particle less, distribute also is that compatibility is better between polymer uniformly.
In 25 ℃ of room temperatures, humidity 70%, under the condition of pressure 0.2MPa, the pure water flux W=920.37ml/cm of mensuration
2HMPa.Similarity condition is measured rejection down, records ovalbumin solution=43000 rejection R=90.32% with ultraviolet specrophotometer, so retaining molecular weight is 43000.The PVC contact angle drops to 41 ° by 78 °.
Claims (2)
1, the polychloroethylene blended diffusion barrier of high flux, it is characterized in that, it by polyvinyl acetaldehyde high polymer or halogenebe-fattyene alcoholysate and polyvinyl chloride with mass ratio 1: 9-9: 1 to be dissolved in mass percent altogether be the 66-87% organic solvent, add the inorganic additive of mass percent 0.01-8% or the organic additive dissolving of mass percent 1-20% again and obtain putting into coagulation bath after blend solution post curing/casting film-forming, the evaporation, obtain the polychloroethylene blended diffusion barrier of high flux of the present invention after peeling off automatically.
2, the preparation method of the polychloroethylene blended diffusion barrier of high flux according to claim 1 is characterized in that it may further comprise the steps:
(1), polyvinyl acetaldehyde high polymer or halogenebe-fattyene alcoholysate and polyvinyl chloride be with mass ratio 1: 9-9: 1 to be dissolved in mass percent altogether be the 66-87% organic solvent, adds the inorganic additive of mass percent 0.01-8% or the organic additive dissolving of mass percent 1-20% again and obtain blend solution;
(2), with above-mentioned blend solution according to common process slaking 2-3 days, 15 ℃-30 ℃ of system film room temperatures, the casting solution temperature is 20 ℃-80 ℃, casting film-forming under the condition of relative air humidity 50-80%;
(3), with putting into 0 ℃ of-50 ℃ of coagulation bath of temperature behind the above-mentioned film evaporation 5-200s, obtain the polychloroethylene blended diffusion barrier of high flux of the present invention after peeling off automatically.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101091880B (en) * | 2007-06-25 | 2010-05-19 | 南京工业大学 | Preparation method of porous separation membrane |
| CN101195084B (en) * | 2007-06-14 | 2010-11-17 | 海南立昇净水科技实业有限公司 | Hydrophilic polyvinyl chloride alloy ultrafiltration membrane and production method thereof |
| CN102124052B (en) * | 2008-06-16 | 2013-12-25 | 可乐丽股份有限公司 | Polyvinyl chloride resin composition and manufacturing method thereof |
| CN104725752A (en) * | 2015-03-14 | 2015-06-24 | 芜湖众力部件有限公司 | Modified plastic with mosquito repelling effect and manufacturing method thereof |
| CN106009377A (en) * | 2016-06-17 | 2016-10-12 | 安庆市天虹新型材料科技有限公司 | Polyvinyl chloride film |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101229489B (en) * | 2007-10-26 | 2010-11-03 | 泉州索爱膜科技开发有限公司 | Film making liquid for polyvinyl chloride hydrophilicity alloy separating film and preparing method thereof |
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- 2004-03-26 CN CN 200410029758 patent/CN1247295C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101195084B (en) * | 2007-06-14 | 2010-11-17 | 海南立昇净水科技实业有限公司 | Hydrophilic polyvinyl chloride alloy ultrafiltration membrane and production method thereof |
| CN101091880B (en) * | 2007-06-25 | 2010-05-19 | 南京工业大学 | Preparation method of porous separation membrane |
| CN102124052B (en) * | 2008-06-16 | 2013-12-25 | 可乐丽股份有限公司 | Polyvinyl chloride resin composition and manufacturing method thereof |
| CN104725752A (en) * | 2015-03-14 | 2015-06-24 | 芜湖众力部件有限公司 | Modified plastic with mosquito repelling effect and manufacturing method thereof |
| CN106009377A (en) * | 2016-06-17 | 2016-10-12 | 安庆市天虹新型材料科技有限公司 | Polyvinyl chloride film |
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