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Surface in-situ modified polyquaternary ammonium functional group mesoporous silicon dioxide material, as well as a preparation method and application thereof

A technology of mesoporous silica and in-situ modification, applied in the fields of chemistry and environment, can solve the problem of high cost and achieve the effects of increasing molecular weight, enhancing electrostatic affinity and controllable morphology

Inactive Publication Date: 2018-05-01
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Polyepichlorohydrin dimethylamine has good hydrolytic stability, non-toxic safety, high temperature resistance, and good stability to external pH changes, but the cost is high

Method used

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  • Surface in-situ modified polyquaternary ammonium functional group mesoporous silicon dioxide material, as well as a preparation method and application thereof
  • Surface in-situ modified polyquaternary ammonium functional group mesoporous silicon dioxide material, as well as a preparation method and application thereof
  • Surface in-situ modified polyquaternary ammonium functional group mesoporous silicon dioxide material, as well as a preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A method for preparing a mesoporous silica material whose surface is in-situ modified with polyquaternary ammonium functional groups, the steps are as follows:

[0039] (1) Add 140ml of deionized water and 5ml of ammonia water (NH 3 .H 2 O), then add 1.5g template agent hexadecyltrimethylammonium bromide, after stirring for 30min under 50°C water bath condition. Slowly add 6.7ml silicon source tetraethyl orthosilicate dropwise into the three-necked flask, stir and react for 4 hours, then ultrasonically clean, then deionized water and absolute ethanol three times respectively, and suction dry. Put the dried sample into a muffle furnace, raise the temperature to 550°C, and calcine at this temperature for 5 hours to remove the template agent, and the white product is mesoporous silica material MCM-41, which is sealed for future use.

[0040] (2) Add 2g of cationic functionalization reagent polyepichlorohydrin dimethylamine (EPI-DMA) and 100g of deionized water into a 250...

Embodiment 2

[0044] A method for preparing a mesoporous silica material whose surface is in-situ modified with polyquaternary ammonium functional groups, the steps are as follows:

[0045] (1) Add 140ml of deionized water and 5ml of ammonia water (NH 3 .H 2 O), then add 1.5g template agent hexadecyltrimethylammonium bromide, after stirring for 30min under 50°C water bath condition. Slowly add 6.7ml silicon source tetraethyl orthosilicate dropwise into the three-necked flask, stir and react for 4 hours, then ultrasonically clean for 10 minutes, then wash three times with deionized water and absolute ethanol in turn, and dry by suction. Put the dried sample into a muffle furnace, raise the temperature to 550°C, and calcine at this temperature for 5 hours to remove the template agent, and the white product is mesoporous silica material MCM-41, which is sealed for future use.

[0046] (2) Add 4g of cationic functionalization reagent polyepichlorohydrin dimethylamine (EPI-DMA) and 100g of dei...

Embodiment 3

[0050] A method for preparing a mesoporous silica material whose surface is in-situ modified with polyquaternary ammonium functional groups, the steps are as follows:

[0051] (1) Add 140ml of deionized water and 5ml of ammonia water (NH 3 .H 2 O), then add 1.5g template agent hexadecyltrimethylammonium bromide, after stirring for 30min under 50°C water bath condition. Slowly add 6.7ml silicon source tetraethyl orthosilicate dropwise into the three-necked flask, stir and react for 4 hours, then ultrasonically clean for 10 minutes, then wash three times with deionized water and absolute ethanol in turn, and dry by suction. Put the dried sample into a muffle furnace, raise the temperature to 550°C, and calcine at this temperature for 5 hours to remove the template agent, and the white product is mesoporous silica material MCM-41, which is sealed for future use.

[0052] (2) Add 10 g of cationic functionalization reagent polyepichlorohydrin dimethylamine (EPI-DMA) and 100 g of ...

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Abstract

The invention relates to a surface in-situ modified polyquaternary ammonium functional group mesoporous silicon dioxide material, as well as a preparation method and application thereof. The method comprises the following steps: adding a mesoporous silicon dioxide material into a functional reagent solution, ultrasonically mixing, performing stirring reaction for 20 to 30 minutes, cleaning and drying to prepare the surface in-situ modified polyquaternary ammonium functional group mesoporous silicon dioxide material. According to the method, polyepichlorohydrin dimethylamine (EPI-DMA) serves acationic functional reagent, the surface of the mesoporous silicon dioxide material is functionalized, the surface of the mesoporous silicon dioxide material has rich hydroxyl functional groups and generates chemical action with the cationic functional reagent polyepichlorohydrin dimethylamine (EPI-DMA), and the obtained organic / inorganic composite material can adsorb anions rapidly.

Description

technical field [0001] The invention relates to a mesoporous silica material whose surface is in-situ modified with polyquaternary ammonium functional groups, a preparation method and application thereof, and belongs to the technical fields of chemistry and environment. Background technique [0002] Mesoporous silica nanomaterials have adjustable uniform mesoporous pore size, a certain wall thickness and an amorphous framework that is easy to dope, high specific surface area, and easy to modify the inner and outer surfaces. Due to the unique mesoporous pore size, the mesoporous silica nanomaterial has the function of a molecular sieve, and pollutants can selectively pass through the pore size according to the size of the molecule. Mesoporous silica nanomaterials have a high specific surface area and can quickly adsorb large amounts of pollutants in water. Therefore, mesoporous silica nanomaterials are widely used as functional materials, adsorbents, catalysts and their suppo...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/28B01J20/30C02F1/28C02F101/22
CPCB01J20/103B01J20/28064B01J20/28076B01J20/28083B01J20/3085C02F1/281C02F2101/22
Inventor 高宝玉张珊珊岳钦艳
Owner SHANDONG UNIV
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