CN101234301A - A polyvinylidene fluoride blend film - Google Patents
A polyvinylidene fluoride blend 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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- polyvinylidene fluoride
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- blend
- glass
- membrane
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- 239000002033 PVDF binder Substances 0.000 title claims abstract description 30
- 229920002981 polyvinylidene fluoride Polymers 0.000 title claims abstract description 30
- 239000000203 mixture Substances 0.000 title claims abstract description 26
- 150000001875 compounds Chemical class 0.000 claims 2
- 238000002156 mixing Methods 0.000 claims 2
- 239000012528 membrane Substances 0.000 abstract description 19
- 229920001542 oligosaccharide Polymers 0.000 abstract description 17
- 150000002482 oligosaccharides Chemical class 0.000 abstract description 17
- 238000001914 filtration Methods 0.000 abstract 1
- 239000010865 sewage Substances 0.000 abstract 1
- 239000011521 glass Substances 0.000 description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 12
- 238000005345 coagulation Methods 0.000 description 12
- 230000015271 coagulation Effects 0.000 description 12
- 239000003795 chemical substances by application Substances 0.000 description 6
- QKIUAMUSENSFQQ-UHFFFAOYSA-N dimethylazanide Chemical compound C[N-]C QKIUAMUSENSFQQ-UHFFFAOYSA-N 0.000 description 6
- 239000012153 distilled water Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000000614 phase inversion technique Methods 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 239000004698 Polyethylene Substances 0.000 description 5
- -1 polyethylene Polymers 0.000 description 5
- 229920000573 polyethylene Polymers 0.000 description 5
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 5
- 230000004907 flux Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 2
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 2
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- HSUXKCIDXHKULN-UHFFFAOYSA-N n,n-dimethylformamide;hydrofluoride Chemical compound F.CN(C)C=O HSUXKCIDXHKULN-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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- Manufacture Of Macromolecular Shaped Articles (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
技术领域：Technical field:
本发明涉及一种过滤膜，特别是一种聚偏氟乙烯共混膜。The invention relates to a filter membrane, in particular to a polyvinylidene fluoride blend membrane.
背景技术：Background technique:
膜分离技术与其他分离技术比较具有能耗低、无污染、占地面积小等突出优点受到重视和研究。进来膜分离在水处理中发挥了重要作用，成为解决水资源危机和水污染的重要手段。目前被广泛应用的水处理膜为聚偏氟乙烯共混膜，共混的物质主要是高分子聚合物或无机盐，这种聚偏氟乙烯共混膜具有化学稳定性好、耐热、耐酸碱、机械强度高、价格低的优点。但这种膜的亲水性较差，在水处理过程中极易被污染，使其水通量降低和使用寿命短，影响了在水处理中的推广和应用。Compared with other separation technologies, membrane separation technology has outstanding advantages such as low energy consumption, no pollution, and small footprint, which has attracted attention and research. In recent years, membrane separation has played an important role in water treatment and has become an important means to solve water resource crisis and water pollution. At present, the widely used water treatment membrane is polyvinylidene fluoride blend membrane. The blended material is mainly polymer or inorganic salt. This polyvinylidene fluoride blend membrane has good chemical stability, heat resistance, The advantages of acid and alkali, high mechanical strength and low price. However, this kind of membrane has poor hydrophilicity and is easily polluted in the water treatment process, resulting in reduced water flux and short service life, which affects the promotion and application in water treatment.
发明内容：Invention content:
本发明的目的是提供一种聚偏氟乙烯共混膜，此共混膜的亲水性好、抗污染能力强。本发明的技术方案是，一种聚偏氟乙烯共混膜，包括有与聚偏氟乙烯的共混物，其特征在于：所述共混物为低聚糖。所述低聚糖与聚偏氟乙烯的重量比为0.22-1.15∶1.15。本发明与现有技术比较具有亲水性能好和抗污染能力强的显著优点。The purpose of the present invention is to provide a polyvinylidene fluoride blend membrane, which has good hydrophilicity and strong anti-pollution ability. The technical solution of the present invention is a polyvinylidene fluoride blend film, including a blend with polyvinylidene fluoride, characterized in that: the blend is oligosaccharide. The weight ratio of the oligosaccharide to polyvinylidene fluoride is 0.22-1.15:1.15. Compared with the prior art, the present invention has the remarkable advantages of good hydrophilic performance and strong anti-pollution ability.
具体实施方式：Detailed ways:
现有聚偏氟乙烯共混膜的亲水性能差的原因是与聚偏氟乙烯共混物的主要是高分子聚合物或者无机物，这些混合物对改善膜的亲水性尚不够理想，经实验发现低聚糖共混物制出的膜的亲水性能好，并且透水性和机械强度也很好。本发明有以下实施例：The reason for the poor hydrophilicity of existing polyvinylidene fluoride blend membranes is that the blends with polyvinylidene fluoride are mainly polymers or inorganic substances, and these mixtures are not ideal for improving the hydrophilicity of the membrane. The experiment found that the membrane made of the oligosaccharide blend has good hydrophilicity, good water permeability and mechanical strength. The present invention has following embodiment:
实施例1、Embodiment 1,
1)将1.15g的聚偏氟乙烯溶于9.5gN-N二甲基酰胺溶剂中，待完全溶解后，在搅拌条件下加入0.22g低聚糖，当其完全溶解后再加入0.22g聚乙烯吡咯烷酮成孔剂，均匀搅拌48小时制成寿膜液后密封静止放置了3天脱泡；1) Dissolve 1.15g of polyvinylidene fluoride in 9.5g of N-N dimethylamide solvent, after it is completely dissolved, add 0.22g of oligosaccharide under stirring conditions, and then add 0.22g of polyethylene after it is completely dissolved Pyrrolidone pore-forming agent, stirred evenly for 48 hours to make a life film liquid, sealed and left for 3 days to defoam;
2)在20±2℃和温度70％条件下，用L-S相转化法在玻璃上流延成膜；2) Under the conditions of 20±2°C and a temperature of 70%, use the L-S phase inversion method to cast a film on glass;
3)将上述玻璃与其上的膜放入25％浓度的乙醇凝固浴中，待膜自动从玻璃上剥落后，取出玻璃，膜在凝固浴浸泡24小时后，用蒸馏水将膜洗净，制成本发明的聚偏氟乙烯和低聚糖共混膜。3) Put the above-mentioned glass and the film on it into a coagulation bath of 25% ethanol. After the film is automatically peeled off from the glass, take out the glass, soak the film in the coagulation bath for 24 hours, and wash the film with distilled water to obtain The polyvinylidene fluoride and oligosaccharide blend film of the present invention.
实施例2、Embodiment 2,
1)将1.15g的聚偏氟乙烯溶于9.5gN-N二甲基酰胺溶剂中，待完全溶解后，在搅拌条件下加入0.45g低聚糖，当其完全溶解后再加入0.22g聚乙烯吡咯烷酮成孔剂，均匀搅拌48小时制成寿膜液后密封静止放置了3天脱泡；1) Dissolve 1.15g of polyvinylidene fluoride in 9.5g of N-N dimethylamide solvent, after it is completely dissolved, add 0.45g of oligosaccharide under stirring conditions, and then add 0.22g of polyethylene after it is completely dissolved Pyrrolidone pore-forming agent, stirred evenly for 48 hours to make a life film liquid, sealed and left for 3 days to defoam;
2)在20±2℃和温度70％条件下，用L-S相转化法在玻璃上流延成膜；2) Under the conditions of 20±2°C and a temperature of 70%, use the L-S phase inversion method to cast a film on glass;
3)将上述玻璃与其上的膜放入25％浓度的乙醇凝固浴中，待膜自动从玻璃上剥落后，取出玻璃，膜在凝固浴浸泡24小时后，用蒸馏水将膜洗净，制成本发明的聚偏氟乙烯和低聚糖共混膜。3) Put the above-mentioned glass and the film on it into a coagulation bath of 25% ethanol. After the film is automatically peeled off from the glass, take out the glass, soak the film in the coagulation bath for 24 hours, and wash the film with distilled water to obtain The polyvinylidene fluoride and oligosaccharide blend film of the present invention.
实施例3、Embodiment 3,
1)将1.15g的聚偏氟乙烯溶于9.5gN-N二甲基酰胺溶剂中，待完全溶解后，在搅拌条件下加入0.69g低聚糖，当其完全溶解后再加入0.22g聚乙烯吡咯烷酮成孔剂，均匀搅拌48小时制成寿膜液后密封静止放置了3天脱泡；1) Dissolve 1.15g of polyvinylidene fluoride in 9.5g of N-N dimethylamide solvent. After it is completely dissolved, add 0.69g of oligosaccharide under stirring conditions, and then add 0.22g of polyethylene after it is completely dissolved. Pyrrolidone pore-forming agent, stirred evenly for 48 hours to make a life film liquid, sealed and left for 3 days to defoam;
2)在20±2℃和温度70％条件下，用L-S相转化法在玻璃上流延成膜；2) Under the conditions of 20±2°C and a temperature of 70%, use the L-S phase inversion method to cast a film on glass;
3)将上述玻璃与其上的膜放入25％浓度的乙醇凝固浴中，待膜自动从玻璃上剥落后，取出玻璃，膜在凝固浴浸泡24小时后，用蒸馏水将膜洗净，制成本发明的聚偏氟乙烯和低聚糖共混膜。3) Put the above-mentioned glass and the film on it into a coagulation bath of 25% ethanol. After the film is automatically peeled off from the glass, take out the glass, soak the film in the coagulation bath for 24 hours, and wash the film with distilled water to obtain The polyvinylidene fluoride and oligosaccharide blend film of the present invention.
实施例4、Embodiment 4,
1)将1.15g的聚偏氟乙烯溶于9.5gN-N二甲基酰胺溶剂中，待完全溶解后，在搅拌条件下加入0.95g低聚糖，当其完全溶解后再加入0.22g聚乙烯吡咯烷酮成孔剂，均匀搅拌48小时制成寿膜液后密封静止放置了3天脱泡；1) Dissolve 1.15g of polyvinylidene fluoride in 9.5g of N-N dimethylamide solvent, after it is completely dissolved, add 0.95g of oligosaccharide under stirring conditions, and then add 0.22g of polyethylene after it is completely dissolved Pyrrolidone pore-forming agent, stirred evenly for 48 hours to make a life film liquid, sealed and left for 3 days to defoam;
2)在20±2℃和温度70％条件下，用L-S相转化法在玻璃上流延成膜；2) Under the conditions of 20±2°C and a temperature of 70%, use the L-S phase inversion method to cast a film on glass;
3)将上述玻璃与其上的膜放入25％浓度的乙醇凝固浴中，待膜自动从玻璃上剥落后，取出玻璃，膜在凝固浴浸泡24小时后，用蒸馏水将膜洗净，制成本发明的聚偏氟乙烯和低聚糖共混膜。3) Put the above-mentioned glass and the film on it into a coagulation bath of 25% ethanol. After the film is automatically peeled off from the glass, take out the glass, soak the film in the coagulation bath for 24 hours, and wash the film with distilled water to obtain The polyvinylidene fluoride and oligosaccharide blend film of the present invention.
实施例5、Embodiment 5,
1)将1.15g的聚偏氟乙烯溶于9.5gN-N二甲基酰胺溶剂中，待完全溶解后，在搅拌条件下加入1.15g低聚糖，当其完全溶解后再加入0.22g聚乙烯吡咯烷酮成孔剂，均匀搅拌48小时制成寿膜液后密封静止放置了3天脱泡；1) Dissolve 1.15g of polyvinylidene fluoride in 9.5g of N-N dimethylamide solvent, after it is completely dissolved, add 1.15g of oligosaccharide under stirring conditions, and then add 0.22g of polyethylene after it is completely dissolved Pyrrolidone pore-forming agent, stirred evenly for 48 hours to make a life film liquid, sealed and left for 3 days to defoam;
2)在20±2℃和温度70％条件下，用L-S相转化法在玻璃上流延成膜；2) Under the conditions of 20±2°C and a temperature of 70%, use the L-S phase inversion method to cast a film on glass;
3)将上述玻璃与其上的膜放入25％浓度的乙醇凝固浴中，待膜自动从玻璃上剥落后，取出玻璃，膜在凝固浴浸泡24小时后，用蒸馏水将膜洗净，制成本发明的聚偏氟乙烯和低聚糖共混膜。3) Put the above-mentioned glass and the film on it into a coagulation bath of 25% ethanol. After the film is automatically peeled off from the glass, take out the glass, soak the film in the coagulation bath for 24 hours, and wash the film with distilled water to obtain The polyvinylidene fluoride and oligosaccharide blend film of the present invention.
比较例、comparative example,
1)将1.1 5g的聚偏氟乙烯溶于9.5gN-N二甲基酰胺溶剂中，待完全溶解后，在搅拌条件下加入0.69gSiO2，当其完全溶解后再加入0.22g聚乙烯吡咯烷酮成孔剂，均匀搅拌48小时制成寿膜液后密封静止放置了3天脱泡；1) Dissolve 1.15g of polyvinylidene fluoride in 9.5g of N-N dimethylamide solvent. After it is completely dissolved, add 0.69g of SiO 2 under stirring conditions. After it is completely dissolved, add 0.22g of polyvinylpyrrolidone to form Pore agent, stirred evenly for 48 hours to make a life membrane liquid, sealed and left for 3 days to defoam;
2)在20±2℃和温度70％条件下，用L-S相转化法在玻璃上流延成膜；2) Under the conditions of 20±2°C and a temperature of 70%, use the L-S phase inversion method to cast a film on glass;
3)将上述玻璃与其上的膜放入25％浓度的乙醇凝固浴中，待膜自动从玻璃上剥落后，取出玻璃，膜在凝固浴浸泡24小时后，用蒸馏水将膜洗净，制成本发明的聚偏氟乙烯和低聚糖共混膜。3) Put the above-mentioned glass and the film on it into a coagulation bath of 25% ethanol. After the film is automatically peeled off from the glass, take out the glass, soak the film in the coagulation bath for 24 hours, and wash the film with distilled water to obtain The polyvinylidene fluoride and oligosaccharide blend film of the present invention.
在室温25℃、湿度75％，压力为0.04MPa条件下，分别对上述实施例所制膜进行纯水通水量测定结果见下表：At room temperature of 25°C, humidity of 75%, and pressure of 0.04MPa, the results of pure water flux measurement of the membranes prepared in the above examples are shown in the following table:
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| CNA200710189933XA CN101234301A (en) | 2007-11-01 | 2007-11-01 | A polyvinylidene fluoride blend film |
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| CNA200710189933XA CN101234301A (en) | 2007-11-01 | 2007-11-01 | A polyvinylidene fluoride blend film |
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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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Open date: 20080806 |