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Method for preparing 3-aminopropyl-trimethoxy-silane-diethylenetriamine-pentaacetic-acid/polyvinylidene-fluoride chelation film

A technology of aminopropyltrimethoxysilane and diethylenetriaminepentaacetic acid, which is applied in the field of polyvinylidene fluoride chelate film preparation, can solve the problem of the limited number of polyaminopolycarboxylic acid functional groups affecting polyvinylidene fluoride Separation membrane performance, colloid particle size can not be too large and other issues, to improve the hydrophilic performance, blending effect is good, to achieve the effect of removal and recycling

Inactive Publication Date: 2012-07-04
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology has the defects of high preparation temperature of membrane casting solution and strict control conditions. For example, the usual reaction temperature is 180°C, and the particle size of the formed colloid should not be too large.
In addition, the number of polyaminopolycarboxylic acid functional groups blended in the polyvinylidene fluoride modified separation membrane prepared by this technology is limited.
The existence of these problems will affect the performance of polyvinylidene fluoride separation membranes, and ultimately limit the application of polyvinylidene fluoride separation membranes in the field of water pollution control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 50g of diethylenetriaminepentaacetic acid and put it into a beaker, add 1100g of dimethyl sulfoxide, stir it with a magnetic force, and the dissolution temperature is 70°C; after it is completely dissolved, slowly raise the solution temperature to 120°C, add 60g of Aminopropyltrimethoxysilane; keep the temperature at about 120°C, and after 1 hour, lower the solution temperature from 120°C to 70°C; add 130g of polyvinylidene fluoride and 20g of polyvinylpyrrolidone to the above solution in turn, and magnetically stir Dissolving and fully blending, the temperature is always controlled at 70°C; after 6h, the prepared blended casting solution is placed in a water bath for 3h for degassing, and the temperature of the water bath is 50°C. Pour the above blended casting solution on smooth glass to form a film with a medical spatula, then form a film in a water condensation bath, soak in distilled water for 48 hours, then soak in 0.1mol / L hydrochloric acid solution for 24 ho...

Embodiment 2

[0026] Take 67g of diethylenetriaminepentaacetic acid and put it into a beaker, add 1100g of dimethyl sulfoxide, stir it with a magnetic force, and the dissolution temperature is 73°C; Aminopropyltrimethoxysilane; keep the temperature at about 123°C, and after 1 hour, lower the solution temperature from 123°C to 73°C; add 150g of polyvinylidene fluoride and 21g of polyvinylpyrrolidone to the above solution in turn, and stir magnetically Dissolving and fully blending, the temperature is always controlled at 73 °C; after 6 hours, the prepared blended casting solution is placed in a water bath for 3.5 hours of defoaming, and the temperature of the water bath is 52 °C. The above-mentioned blended cast solution is drawn into a hollow fiber chelate membrane with a spinning machine, the core liquid is 5% (volume ratio) ethanol aqueous solution, and the flow rate is 1.2mL / min; the cast solution extrusion rate is 1.3mL / min, every The length of the fiber filaments prepared in 1 minute i...

Embodiment 3

[0028] Take 80g of diethylenetriaminepentaacetic acid and put it into a beaker, add 1100g of dimethyl sulfoxide, stir it with a magnetic force, and the dissolution temperature is 77°C; after it is completely dissolved, slowly raise the solution temperature to 126°C, add 72g of Aminopropyltrimethoxysilane; keep the temperature at about 126°C, and after 1 hour, lower the solution temperature from 126°C to 78°C; add 160g of polyvinylidene fluoride and 27g of polyvinylpyrrolidone to the above solution in turn, and magnetically stir Dissolving and fully blending, the temperature is always controlled at 78°C; after 6h, the prepared blended casting solution is placed in a water bath for degassing for 4h, and the temperature of the water bath is 57°C. The above-mentioned blended cast solution is drawn into a hollow fiber chelate membrane with a spinning machine, the core liquid is 5% (volume ratio) ethanol aqueous solution, and the flow rate is 1.6mL / min; the cast solution extrusion ra...

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PUM

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Abstract

The invention discloses a method for preparing a 3-aminopropyl-trimethoxy-silane-diethylenetriamine-pentaacetic-acid / polyvinylidene-fluoride chelation film. 3-aminopropyl-trimethoxy-silane, diethylenetriamine pentaacetic acid, dimethyl sulfoxide, polyvinylidene fluoride and the like are used as main reagents; the 3-aminopropyl-trimethoxy-silane and the diethylenetriamine pentaacetic acid generate covalently bonding reaction at certain temperature; blending cast liquid is prepared by adopting a physical blending / phase transferring technology; and the chelation film is prepared by scraping or dragging the blending cast liquid. The method is easy to operate and low in cost; the preparation temperature is low; the produced chelation film has a good blending effect; and heavy metal pollutants can be effectively removed from waste water.

Description

technical field [0001] The invention relates to a preparation method of a polyvinylidene fluoride polymer material, in particular to a preparation method of a polyvinylidene fluoride chelate film. Background technique [0002] Membrane separation technology has the advantages of normal temperature operation, no phase change, significant energy saving effect, high filtration precision, and good effluent quality. Through the screening and interception of the separation membrane, it can achieve excellent filtration of suspended particles and colloidal pollutants in the water body. remove. Polyvinylidene fluoride separation membranes have excellent pollution resistance and chemical oxidation resistance, and can effectively remove suspended particles and colloidal pollutants in water, but conventional polyvinylidene fluoride separation membranes cannot remove water-soluble heavy metal ions. In the heavy metal pollution treatment process, membrane separation technology is current...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D71/34C02F1/44
Inventor 宋来洲付杰王洋刘晓伟吴春雷牟文宇
Owner YANSHAN UNIV
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