CN101234301A - Polyvinylidene fluoride blending film - Google Patents
Polyvinylidene fluoride blending film Download PDFInfo
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- CN101234301A CN101234301A CNA200710189933XA CN200710189933A CN101234301A CN 101234301 A CN101234301 A CN 101234301A CN A200710189933X A CNA200710189933X A CN A200710189933XA CN 200710189933 A CN200710189933 A CN 200710189933A CN 101234301 A CN101234301 A CN 101234301A
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- China
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- film
- polyvinylidene fluoride
- blend
- glass
- kynoar
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Abstract
The invention discloses a blend membrane of polyvinylidene fluoride, which relates to a filtration membrane, aiming at providing a blend membrane of polyvinylidene fluoride with good hydrophilicity and strong antipollution ability. The technical proposal of the invention is that a blend membrane of polyvinylidene fluoride comprises a blend of polyvinylidene fluoride, the blend is oligosaccharide. The weight proportion of the oligosaccharide and the polyvinylidene fluoride is 0.22-1.15 : 1.15. The blend membrane of the invention is particularly applied to the sewage treatment.
Description
Technical field:
The present invention relates to a kind of filter membrane, particularly a kind of polyvinylidene fluoride blending film.
Background technology:
Membrane separation technique and other isolation technics relatively have outstanding advantages such as energy consumption is low, pollution-free, floor space is little and come into one's own and study.The film of coming in is separated in and has brought into play important function in the water treatment, becomes to solve the important means that water resources crisis and water pollute.The membrane for water treatment that is widely used at present is a polyvinylidene fluoride blending film, and the material of blend mainly is high molecular polymer or inorganic salts, and this polyvinylidene fluoride blending film has that chemical stability is good, heat-resisting, acid and alkali-resistance, mechanical strength height, advantage that price is low.But the hydrophily of this film is relatively poor, and is very easily contaminated in water treatment procedure, makes its water flux reduction and service life short, influenced the promotion and application in water treatment.
Summary of the invention:
The purpose of this invention is to provide a kind of polyvinylidene fluoride blending film, good hydrophilic property, the contamination resistance of this blend film are strong.Technical scheme of the present invention is, a kind of polyvinylidene fluoride blending film includes the blend with Kynoar, and it is characterized in that: described blend is a compound sugar.The weight ratio of described compound sugar and Kynoar is 0.22-1.15: 1.15.The present invention's possess hydrophilic property compared with the prior art can the good and strong remarkable advantage of contamination resistance.
The specific embodiment:
The reason of the hydrophilicity difference of existing polyvinylidene fluoride blending film be with the polyvinylidene blending thing mainly be high molecular polymer or inorganic matter, these mixtures are still not ideal enough to the hydrophily of improving film, the hydrophilicity of finding the film that the compound sugar blend is made through experiment is good, and water penetration and mechanical strength are also fine.The present invention has following examples:
Embodiment 1,
1) Kynoar with 1.15g is dissolved in the 9.5gN-N dimethylformamide solvent, after treating to dissolve fully, under stirring condition, add the 0.22g compound sugar, after it dissolves fully, add 0.22g polyvinylpyrrolidone pore former again, evenly stir and made behind the longevity film liquid that sealing is static has placed deaeration in 3 days in 48 hours;
2) under 20 ± 2 ℃ and temperature 70% condition, with the L-S phase inversion at casting film-forming on glass;
3) alcohol solidification of above-mentioned glass and the film on it being put into 25% concentration is bathed, and treats that film automatically after on glass peeling off, takes out glass, and film is cleaned film with distilled water after coagulating bath is soaked 24 hours, makes Kynoar of the present invention and compound sugar blend film.
Embodiment 2,
1) Kynoar with 1.15g is dissolved in the 9.5gN-N dimethylformamide solvent, after treating to dissolve fully, under stirring condition, add the 0.45g compound sugar, after it dissolves fully, add 0.22g polyvinylpyrrolidone pore former again, evenly stir and made behind the longevity film liquid that sealing is static has placed deaeration in 3 days in 48 hours;
2) under 20 ± 2 ℃ and temperature 70% condition, with the L-S phase inversion at casting film-forming on glass;
3) alcohol solidification of above-mentioned glass and the film on it being put into 25% concentration is bathed, and treats that film automatically after on glass peeling off, takes out glass, and film is cleaned film with distilled water after coagulating bath is soaked 24 hours, makes Kynoar of the present invention and compound sugar blend film.
Embodiment 3,
1) Kynoar with 1.15g is dissolved in the 9.5gN-N dimethylformamide solvent, after treating to dissolve fully, under stirring condition, add the 0.69g compound sugar, after it dissolves fully, add 0.22g polyvinylpyrrolidone pore former again, evenly stir and made behind the longevity film liquid that sealing is static has placed deaeration in 3 days in 48 hours;
2) under 20 ± 2 ℃ and temperature 70% condition, with the L-S phase inversion at casting film-forming on glass;
3) alcohol solidification of above-mentioned glass and the film on it being put into 25% concentration is bathed, and treats that film automatically after on glass peeling off, takes out glass, and film is cleaned film with distilled water after coagulating bath is soaked 24 hours, makes Kynoar of the present invention and compound sugar blend film.
Embodiment 4,
1) Kynoar with 1.15g is dissolved in the 9.5gN-N dimethylformamide solvent, after treating to dissolve fully, under stirring condition, add the 0.95g compound sugar, after it dissolves fully, add 0.22g polyvinylpyrrolidone pore former again, evenly stir and made behind the longevity film liquid that sealing is static has placed deaeration in 3 days in 48 hours;
2) under 20 ± 2 ℃ and temperature 70% condition, with the L-S phase inversion at casting film-forming on glass;
3) alcohol solidification of above-mentioned glass and the film on it being put into 25% concentration is bathed, and treats that film automatically after on glass peeling off, takes out glass, and film is cleaned film with distilled water after coagulating bath is soaked 24 hours, makes Kynoar of the present invention and compound sugar blend film.
Embodiment 5,
1) Kynoar with 1.15g is dissolved in the 9.5gN-N dimethylformamide solvent, after treating to dissolve fully, under stirring condition, add the 1.15g compound sugar, after it dissolves fully, add 0.22g polyvinylpyrrolidone pore former again, evenly stir and made behind the longevity film liquid that sealing is static has placed deaeration in 3 days in 48 hours;
2) under 20 ± 2 ℃ and temperature 70% condition, with the L-S phase inversion at casting film-forming on glass;
3) alcohol solidification of above-mentioned glass and the film on it being put into 25% concentration is bathed, and treats that film automatically after on glass peeling off, takes out glass, and film is cleaned film with distilled water after coagulating bath is soaked 24 hours, makes Kynoar of the present invention and compound sugar blend film.
Comparative example,
1) Kynoar with 1.1 5g is dissolved in the 9.5gN-N dimethylformamide solvent, after treating to dissolve fully, adds 0.69gSiO under stirring condition
2, after dissolving fully, it adds 0.22g polyvinylpyrrolidone pore former again, and evenly stir and made behind the longevity film liquid that sealing is static has placed deaeration in 3 days in 48 hours;
2) under 20 ± 2 ℃ and temperature 70% condition, with the L-S phase inversion at casting film-forming on glass;
3) alcohol solidification of above-mentioned glass and the film on it being put into 25% concentration is bathed, and treats that film automatically after on glass peeling off, takes out glass, and film is cleaned film with distilled water after coagulating bath is soaked 24 hours, makes Kynoar of the present invention and compound sugar blend film.
In 25 ℃ of room temperatures, humidity 75%, pressure is under the 0.04MPa condition, respectively the made film of the foregoing description is carried out pure water water-flowing amount measurement result and sees the following form:
| Embodiment | Kynoar | Dimethyl formamide | Compound sugar | Polyvinylpyrrolidone | Water flux |
| 1 | ?1.15g | ?9.5g | ?0.22g | ?0.22g | ?281.21/m 2·h |
| 2 | ?1.15g | ?9.5g | ?0.45g | ?0.22g | ?331.21/m 2·h |
| 3 | ?1.15g | ?9.5g | ?0.69g | ?0.22g | ?396.71/m 2·h |
| 4 | ?1.15g | ?9.5g | ?0.95g | ?0.22g | ?235.91/m 2·h |
| 5 | ?1.15g | ?9.5g | ?1.15g | ?0.22g | ?209.81/m 2·h |
| Comparative example | ?1.15g | ?9.5g | ?SiO20.69g | ?0.22g | ?223.01/m 2·h |
Claims (2)
1, a kind of polyvinylidene fluoride blending film includes the blend with Kynoar, and it is characterized in that: described blend is a compound sugar.
2, a kind of polyvinylidene fluoride blending film as claimed in claim 1 is characterized in that: the weight ratio of described compound sugar and Kynoar is 0.22-1.15: 1.15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710189933XA CN101234301A (en) | 2007-11-01 | 2007-11-01 | Polyvinylidene fluoride blending film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710189933XA CN101234301A (en) | 2007-11-01 | 2007-11-01 | Polyvinylidene fluoride blending film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101234301A true CN101234301A (en) | 2008-08-06 |
Family
ID=39918360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200710189933XA Pending CN101234301A (en) | 2007-11-01 | 2007-11-01 | Polyvinylidene fluoride blending film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101234301A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102327746A (en) * | 2011-08-23 | 2012-01-25 | 复旦大学 | Anti-pollution cyclodextrin-polymer composite nano-filtration membrane and preparation method thereof |
| US11667782B2 (en) | 2020-09-09 | 2023-06-06 | Industrial Technology Research Institute | Polyvinylidene fluoride film composition, and polyvinylidene fluoride isolation film |
-
2007
- 2007-11-01 CN CNA200710189933XA patent/CN101234301A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102327746A (en) * | 2011-08-23 | 2012-01-25 | 复旦大学 | Anti-pollution cyclodextrin-polymer composite nano-filtration membrane and preparation method thereof |
| CN102327746B (en) * | 2011-08-23 | 2014-04-02 | 复旦大学 | Anti-pollution cyclodextrin-polymer composite nano-filtration membrane and preparation method thereof |
| US11667782B2 (en) | 2020-09-09 | 2023-06-06 | Industrial Technology Research Institute | Polyvinylidene fluoride film composition, and polyvinylidene fluoride isolation film |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080806 |