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Polyvinylidene fluoride hollow fiber film and preparation method thereof

A polyvinylidene fluoride membrane and polyvinylidene fluoride technology are applied in the field of polyvinylidene fluoride hollow fiber membrane and its preparation, which can solve the problems of high-priced domestic membranes and low-performance MBR, etc., and achieve excellent chemical stability, reduced energy consumption, The effect of high water flux

Inactive Publication Date: 2012-03-28
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a sense, the high price of foreign membranes and the low performance of domestic membranes have become obstacles to the promotion and application of MBR in my country to a certain extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1: Add maleic anhydride and polyethylene glycol monomethyl ether in a molar ratio of 1: 2.2 into a three-necked flask, then add 3% p-toluenesulfonic acid that accounts for maleic anhydride and polyethylene glycol monomethyl ether as Catalyst, account for the toluene of 60% of the total mass of all mixtures (comprising toluene) as reaction solvent, stir and heat up to 105 ℃ of water separation and reflux, react for 7 hours, cool to room temperature, add sodium carbonate to neutralize p-toluenesulfonic acid, remove solvent toluene, Dissolved with ethanol to obtain monopolyethylene glycol monomethyl ether maleate solution; then the obtained monopolyethylene glycol monomethyl ether maleate solution, methyl methacrylate and styrene in a molar ratio of 5: 3:2 mixing, and azobisisobutyronitrile, which accounts for 3% of the mixture of the three by mass, was added into the three-necked flask, and the temperature was raised to 85° C. under the protection of nitrogen to carry...

Embodiment 2

[0025] Step 1: Add maleic anhydride and polyethylene glycol monomethyl ether in a molar ratio of 1: 2.4 into a three-necked flask, then add 4% p-toluenesulfonic acid that accounts for maleic anhydride and polyethylene glycol monomethyl ether as Catalyst, the toluene that accounts for all mixture gross mass (comprising toluene) 70% is used as reaction solvent, stirs and heats up to 105 ℃ of water separation refluxes, reacts 7h, is cooled to room temperature, adds sodium carbonate to neutralize p-toluenesulfonic acid, removes solvent toluene, uses Dissolved in ethanol to obtain monopolyethylene glycol monomethyl ether maleate solution; then the obtained monopolyethylene glycol monomethyl ether maleate solution, methyl methacrylate and styrene in a molar ratio of 5:3 : 2, and azobisisobutyronitrile, which accounts for 3% of the mixture by mass, was added into the three-necked flask, and the temperature was raised to 120° C. under the protection of nitrogen to carry out the polymer...

Embodiment 3

[0030]Step 1: Add maleic anhydride and polyethylene glycol monomethyl ether in a molar ratio of 1: 2.0 to a three-necked flask, then add 5% p-toluenesulfonic acid that accounts for maleic anhydride and polyethylene glycol monomethyl ether as Catalyst, toluene accounting for 40% of the total mass of all mixtures (including toluene) is used as a solvent, stirred and heated to 105 ° C, water is refluxed, reacted for 7 hours, cooled to room temperature, and sodium carbonate is added to neutralize p-toluenesulfonic acid, the solvent toluene is removed, and ethanol is used Dissolving to obtain monopolyethylene glycol monomethyl ether maleate solution. Then the obtained monopolyethylene glycol monomethyl ether maleate solution, methyl acrylate and styrene are in a molar ratio of 5:2:3, and the mass percentage accounts for 3% azobisisobutylene of the mixture of the three Nitrile was added into the three-necked flask, and the temperature was raised to 60°C under the protection of nitro...

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PUM

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Abstract

The invention discloses a polyvinylidene fluoride hollow fiber film and a preparation method thereof. The preparation method comprises: firstly, synthesizing an amphiphilic polymer; uniformly mixing a polyvinyl chloride film material and the amphiphilic polymer uniformly, and preparing film casting liquid by mixing the mixture of the polyvinyl chloride film material and the amphiphilic polymer, a pore forming agent and a solvent for making the film casting liquid; spraying the prepared film casting liquid and an inner gel medium at 70 to 80 DEG C at the same time through a spray nozzle; keeping the sprayed material in room-temperature air with a humidity of 50 to 60 percent for 2 to 10 seconds; and immersing the sprayed material in an outer gel medium setting bath at 20 to 30 DEG C at a constant speed, immersing the formed product in the outer gel medium at 20 to 30 DEG C for over 8 hours, and obtaining the hollow fiber film. The film has high hydrophily, large flux and pollution resistance.

Description

technical field [0001] The invention relates to a polymer membrane, in particular to a polyvinylidene fluoride hollow fiber membrane and a preparation method thereof. Background technique [0002] Membrane Bio-Reactor technology (MBR for short) is the product of the organic combination of membrane separation technology and sewage biological treatment technology. It is generally considered to be a sewage treatment technology with stable performance, good effect and great development potential. The feature of this technology is to replace the sludge-water gravity sedimentation separation process in the traditional activated sludge treatment process with the ultra-microfiltration membrane separation process. Due to the membrane separation, it can maintain a high biophase concentration and excellent water effluent effect. Effectively remove organic matter and ammonia nitrogen and other pollutants in water. In the past ten years, membrane bioreactor (MBR) technology has graduall...

Claims

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Application Information

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IPC IPC(8): B01D69/08B01D71/34B01D67/00
Inventor 杜远航肖通虎和磊磊甄洪峰朱芳琴张瑞丰
Owner NINGBO UNIV
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