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Preparation method of beta-cyclodextrin polymer-grafted polyvinylidene fluoride adsorbent material

A technology of cyclodextrin polymer and polyvinylidene fluoride, which is applied in chemical instruments and methods, and other chemical processes, and can solve the problems that polyvinylidene fluoride adsorption membranes and chelating microfiltration membranes cannot be used for directly edible liquids, etc. , to achieve the effect of ensuring a healthy diet

Inactive Publication Date: 2019-07-12
浙江飞剑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a new β-cyclodextrin polymer grafted polyvinylidene fluoride, aiming at the defects that the polyvinylidene fluoride adsorption membrane and the chelating microfiltration membrane cannot be applied to directly edible liquids existing in the prior art. Preparation method of adsorbent material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The preparation method of β-cyclodextrin polymer graft polyvinylidene fluoride adsorption material comprises the following steps:

[0046] (a) Under the protection of an inert gas, place the polyvinylidene fluoride material in a mixture A of an alkaline solution with a concentration of 0.5 mol / L and a potassium permanganate solution with a mass concentration of 2% and shake it for 15 minutes. The mass ratio of the polyvinylidene fluoride material to the mixture A is 1:20, and the mass ratio of the alkaline solution to the potassium permanganate solution in the mixture A is 100:1 to obtain a polyvinylidene fluoride defluorinated material that removes HF ;

[0047] (b) Immerse the obtained polyvinylidene fluoride defluorinated material in a mixture B of sulfuric acid with a mass concentration of 4% and a sodium bisulfite solution with a mass concentration of 2%, and the polyvinylidene fluoride defluorinated material and mixture B The mass ratio of sulfuric acid and sodiu...

Embodiment 2

[0058] The preparation method of β-cyclodextrin polymer graft polyvinylidene fluoride adsorption material comprises the following steps:

[0059] (a) Under the protection of an inert gas, place the polyvinylidene fluoride material in a mixture A of an alkaline solution with a concentration of 0.8 mol / L and a potassium permanganate solution with a mass concentration of 4% and shake it for 15 to 30 minutes, The mass ratio of the polyvinylidene fluoride material to the mixture A is 1:60, and the mass ratio of the alkaline solution to the potassium permanganate solution in the mixture A is 100:5, and the polyvinylidene fluoride stripped of HF is obtained. Fluorine material;

[0060] (b) Immerse the obtained polyvinylidene fluoride defluorinated material in a mixture B of sulfuric acid with a mass concentration of 6% and a sodium bisulfite solution with a mass concentration of 4%, and the polyvinylidene fluoride defluorinated material and mixture B The mass ratio of sulfuric acid ...

Embodiment 3

[0071] The preparation method of β-cyclodextrin polymer graft polyvinylidene fluoride adsorption material comprises the following steps:

[0072] (a) Under the protection of an inert gas, place the polyvinylidene fluoride material in a mixture A of an alkaline solution with a concentration of 0.65 mol / L and a potassium permanganate solution with a mass concentration of 3% and shake it for 20 minutes. The mass ratio of the polyvinylidene fluoride material to the mixture A is 1:40, and the mass ratio of the alkaline solution to the potassium permanganate solution in the mixture A is 100:3 to obtain a polyvinylidene fluoride defluorinated material that removes HF ;

[0073] (b) Immerse the obtained polyvinylidene fluoride defluorinated material in a mixture B of sulfuric acid with a mass concentration of 5% and a sodium bisulfite solution with a mass concentration of 3%, and the polyvinylidene fluoride defluorinated material and mixture B The mass ratio of sulfuric acid and sodi...

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Abstract

The invention discloses a preparation method of a beta-cyclodextrin polymer-grafted polyvinylidene fluoride adsorbent material. The preparation method comprises the following steps: placing a polyvinylidene fluoride material in a mixture A, shaking for reaction to obtain a polyvinylidene fluoride defluorinated material, immersing the polyvinylidene fluoride defluorinated material in a mixture B toobtain a polyvinylidene fluoride hydroxyl material, immersing the polyvinylidene fluoride hydroxyl material in a mixture C to obtain an acrylate-grafted polyvinylidene fluoride acrylic material, taking a beta-cyclodextrin polymer, dissolving the beta-cyclodextrin polymer in anhydrous dimethylformamide, adding a catalyst to obtain a mixture D, removing the remaining catalyst, adding glycidyl acrylate, stirring to obtain a GMA-beta-cyclodextrin polymer, immersing the polyvinylidene fluoride acrylic material in distilled water, and adding the GMA-beta-cyclodextrin polymer and an initiator to obtain the beta-cyclodextrin polymer-grafted polyvinylidene fluoride adsorbent material. The beta-cyclodextrin polymer-grafted polyvinylidene fluoride adsorbent material can be directly applied to edibleliquid, for example, to containers such as cups and kettles, and can effectively absorb heavy metals in the edible liquid and guarantee the diet health of people.

Description

technical field [0001] The invention relates to a preparation method of an adsorption material, in particular to a preparation method of a beta-cyclodextrin polymer grafted polyvinylidene fluoride adsorption material. Background technique [0002] Heavy metal pollution refers to environmental pollution caused by heavy metals or their compounds. It is mainly caused by human factors such as mining, exhaust gas discharge, sewage irrigation, and the use of products with heavy metals exceeding the standard. Human activities lead to an increase in the content of heavy metals in the environment, which exceeds the normal range. These heavy metal pollution directly endanger human health through water resources and the food chain, and lead to deterioration of environmental quality, especially the pollution of heavy metals in liquids such as drinking water, tea, fruit juice drinks, and traditional Chinese medicine soup. Food safety is closely related to health. Before people drink the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30
CPCB01J20/265
Inventor 夏飞剑吴银秋欧阳陈汉
Owner 浙江飞剑科技有限公司
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