Preparation method of modified polyvinylidene fluoride hybrid film and application thereof

A polyvinylidene fluoride, hybrid membrane technology, applied in chemical instruments and methods, separation methods, membrane technology and other directions, to achieve the effect of mild preparation process conditions and excellent performance

Active Publication Date: 2015-04-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the prior art, the present invention provides a method for preparing a modified polyvinylidene fluoride hybrid membrane. The preparation method is sim

Method used

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  • Preparation method of modified polyvinylidene fluoride hybrid film and application thereof
  • Preparation method of modified polyvinylidene fluoride hybrid film and application thereof
  • Preparation method of modified polyvinylidene fluoride hybrid film and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: a kind of preparation method of the polyvinylidene fluoride hybrid film of modification, comprises the following steps:

[0030] Step 1. Preparation of fluorine-containing amphiphilic membrane modifier: Add 4.7g of hexafluorobutyl acrylate monomer into a three-necked flask with a stirrer, add 80mL of dehydrated ethanol, and mechanically stir for 30 minutes under nitrogen protection , and the reaction temperature was set to 70°C. After the oxygen in the system is eliminated, add 164mg of azobisisobutyronitrile to initiate, and react at 70°C for 2 hours, then use a constant pressure dropping funnel to add acrylic acid ethanol solution drop by drop. The acrylic acid ethanol solution is dissolved in 20ml of acrylic acid Anhydrous ethanol was obtained, and the reaction was continued for 8 hours. After the reaction, the reaction solution was extracted three times with n-heptane to remove unreacted monomers and small molecular substances, and then freeze-dried t...

Embodiment 2

[0034] Embodiment 2: a kind of preparation method of the polyvinylidene fluoride hybrid film of modification, comprises the following steps:

[0035] Step 1, prepare fluorine-containing amphiphilic membrane modifier, same as Example 1;

[0036] Step 2. Preparation of fluorine-containing amphiphilic membrane composite modifier solution: Weigh 0.8g of the polyhexafluorobutyl acrylate-polyacrylic acid copolymer prepared in step 1, dissolve it in 3.0g of N-methylpyrrolidone, and stir Add 204 mg of butyl titanate dropwise, stir at 60°C for 10 hours to form an orange homogeneous phase, and a modifier solution in which polyhexafluorobutyl acrylate-polyacrylic acid copolymer and butyl titanate are dissolved is the fluorine-containing amphiphile Membrane composite modifier solution.

[0037] Step 3, preparing a modified polyvinylidene fluoride hybrid film, the same as in Example 1, wherein, in the water bath, butyl titanate is hydrolyzed and polycondensed to form titanium dioxide nano...

Embodiment 3

[0039] Embodiment 3: a kind of preparation method of the polyvinylidene fluoride hybrid film of modification, comprises the following steps:

[0040] Step 1, prepare fluorine-containing amphiphilic membrane modifier, same as Example 1;

[0041] Step 2. Preparation of fluorine-containing amphiphilic membrane composite modifier solution: Weigh 0.8g of the polyhexafluorobutyl acrylate-polyacrylic acid copolymer prepared in step 1, dissolve it in 3.0g of N-methylpyrrolidone, and stir Add 304 mg of butyl titanate dropwise, stir at 60°C for 10 hours to form an orange homogeneous phase, and a modifier solution in which polyhexafluorobutyl acrylate-polyacrylic acid copolymer and butyl titanate are dissolved is the fluorine-containing amphiphile Membrane composite modifier solution.

[0042] Step 3, preparing a modified polyvinylidene fluoride hybrid membrane, the same as in Example 1, wherein the butyl titanate in the water bath is hydrolyzed and polycondensed to form titanium dioxid...

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Abstract

The invention discloses a preparation method of a modified polyvinylidene fluoride hybrid film. The preparation method disclosed by the invention comprises the steps of preparing a fluorine-containing amphipathic film modifier, preparing fluorine-containing amphipathic film compound modifier solution and finally preparing the modified polyvinylidene fluoride hybrid film, wherein the fluorine-containing amphipathic film modifier is prepared by taking hexafluorobutyl acrylate and acrylic acid as the raw materials, azodiisobutyronitrile as an initiator and ethanol as a solvent through a sequence dropping method under the protection of nitrogen; the modifier is blended with butyl titanate, so that the compound modifier solution is prepared; and the compound modifier solution is mixed with polyvinylidene fluoride solution, so that the modified polyvinylidene fluoride hybrid film is prepared through a phase inversion method. The preparation method of the modified polyvinylidene fluoride hybrid film and application thereof disclosed by the invention have the advantages that the preparation method of the hybrid film is moderate in process and simple and easy to do; the prepared hybrid film is excellent in property; when the hybrid film is used for processing emulsified oil, the interceptive rate to emulsified oil is up to 99.9%; the flux attenuation is as low as 22%; and the washing flux recovery capacity can be higher than 99%.

Description

technical field [0001] The invention relates to a preparation method of an anti-pollution oil-water separation hybrid membrane, in particular to a preparation method of an anti-pollution titanium dioxide hybrid membrane used for emulsified oil treatment. Background technique [0002] Our country and even countries all over the world are facing the severe situation of water resource shortage and water quality deterioration. The problem of water pollution has become one of the important environmental problems facing the world today. Among them, the discharge of petrochemical oily wastewater is an important reason for the deterioration of water quality, and it also causes a lot of waste of oil body resources. Oily wastewater has a wide range of sources. In the fields of petroleum, chemical industry, metallurgy, machinery manufacturing and food processing, all water that directly contacts with oil contains oil, and the discharge of oily wastewater is huge, especially in the petr...

Claims

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Application Information

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IPC IPC(8): B01D71/82B01D71/34B01D71/76B01D69/02B01D67/00B01D17/022
Inventor 姜忠义赵雪婷苏延磊
Owner TIANJIN UNIV
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