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Thermo-sensitive type ultrafiltration membrane and preparation method thereof

A temperature-sensitive, ultrafiltration membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., to improve anti-pollution performance, solve hydrophilicity, and improve anti-pollution performance

Inactive Publication Date: 2013-12-04
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on environmental responsiveness, and the intelligent separation of ultrafiltration membranes has great potential application value. This kind of intelligent material is one of the future development trends.

Method used

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  • Thermo-sensitive type ultrafiltration membrane and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0026] Step 1: Dissolve N-isopropylacrylamide (NIPAAM) and polyethylene glycol methacrylate (PEGMA) in tert-butanol at a mass ratio of 0.62:1 and add it to a 250mL three-necked flask. Add NIPAAM and The initiator azobisisobutyronitrile of 3% of the total mass of PEGMA was reacted at 78°C for 12 hours under the protection of nitrogen, and after the reaction was completed, separation and purification were carried out to obtain a temperature-sensitive double-hydrophilic polymer.

[0027] Step 2: Mix polyvinylidene fluoride and temperature-sensitive double-hydrophilic polymer evenly at a mass ratio of 85% and 15%, and then mix the mixture of the two, isopropanol and dimethylacetamide at a ratio of 14%:5% : 81% mass percentage preparation, the mixture and dimethylacetamide are heated and stirred at 75°C to dissolve, and after the dissolution is uniform, isopropanol is added to stir and mix to obtain a casting solution, and then stand for defoaming;

[0028] Step 3: The prepared cas...

Embodiment 2

[0031] Step 1: Dissolve N-isopropylacrylamide (NIPAAM) and polyethylene glycol methacrylate (PEGMA) in tert-butanol at a mass ratio of 1:1 and add it to a 250mL three-necked flask. Add NIPAAM and The initiator azobisisobutyronitrile of 2% of the total mass of PEGMA was reacted at 78°C for 12 hours under the protection of nitrogen, and the temperature-sensitive double-hydrophilic polymer was obtained by separation and purification after the reaction was completed.

[0032] Step 2: Mix polyvinylidene fluoride and temperature-sensitive double-hydrophilic polymer evenly at a mass ratio of 85% and 15%, and then mix the mixture of the two, isopropanol and dimethylacetamide at a ratio of 16%: 4% : 80% mass percentage preparation, the mixture and dimethylacetamide are heated and stirred at 75°C to dissolve, and after the dissolution is uniform, isopropanol is added to stir and mix to obtain a casting solution, and then stand for defoaming;

[0033] Step 3: Scrape the prepared casting ...

Embodiment 3

[0036] Step 1: Dissolve N-isopropylacrylamide (NIPAAM) and polyethylene glycol methacrylate (PEGMA) in tert-butanol at a mass ratio of 1.5:1 and add it to a 250mL three-necked flask. Add NIPAAM and The initiator azobisisobutyronitrile of 2% of the total mass of PEGMA was reacted at 78°C for 12 hours under the protection of nitrogen, and the temperature-sensitive double-hydrophilic polymer was obtained by separation and purification after the reaction was completed.

[0037] Step 2: Mix polyvinylidene fluoride and temperature-sensitive double-hydrophilic polymer at a mass ratio of 85% and 15%, and then mix the mixture of the two, isopropanol, methylenebisacrylamide and dimethylethylene The amide is prepared according to the mass percentage of 15.1%: 4%: 0.9%: 80%. First, heat and stir the mixture and dimethylacetamide at 75°C to dissolve. After the dissolution is uniform, add isopropanol and methylenebisacrylamide and stir. Mix to obtain the casting solution, then let it stand ...

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Abstract

The invention relates to a thermo-sensitive type ultrafiltration membrane and a preparation method thereof. The thermo-sensitive type ultrafiltration membrane comprises main components of 85-90 wt% of a polyvinylidene fluoride membrane material and 10-15 wt% of a thermo-sensitive type amphiphilic water-based polymer. The preparation method is as below: first synthesizing the thermo-sensitive type amphiphilic water-based polymer; then mixing well the high-molecular film material and the polymer; mixing the mixture of the high-molecular film material and the polymer, a pore forming agent and a solvent for a film casting liquid to prepare a film casting liquid; and preparing the film casting liquid into a flat sheet membrane, a spiral-wound membrane and a hollow-fiber membrane. The ultrafiltration membrane provided by the invention has large flux, lasting hydrophilicity and anti-pollution performance, and can response to changes of environmental temperature.

Description

technical field [0001] The invention relates to the technical field of polymer functional membranes, in particular to a temperature-sensitive ultrafiltration membrane and a preparation method thereof. Background technique [0002] Membrane technology has become an attractive and competitive new technology to replace traditional water treatment processes due to its characteristics of low energy consumption, high separation efficiency, good effluent quality, and convenient operation and maintenance. In the past ten years, it has not only been widely used in pure water preparation, deep purification of drinking water, food, fermentation and other industries, but also has been vigorously developed in the fields of resource recovery and utilization of industrial sewage and domestic sewage. [0003] At present, a major obstacle that restricts the popularization and application of membrane technology in actual engineering is the problem of membrane fouling. When removing pollutant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D69/02
Inventor 申菲菲肖通虎和磊磊张俊立
Owner NINGBO UNIV
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