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Preparation method and application of functional silica nano material

A nanomaterial, silicon dioxide technology, applied in the field of nanomaterials, can solve problems such as difficult separation, and achieve the effect of effective and rapid processing

Active Publication Date: 2013-01-02
中琦(广东)硅材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polymer composite material has been used as an effective adsorbent because of its large number of functional groups and high selectivity, but this adsorbent also has its own shortcomings, such as not easy to separate from aqueous solution, etc.

Method used

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  • Preparation method and application of functional silica nano material
  • Preparation method and application of functional silica nano material
  • Preparation method and application of functional silica nano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A functional silica nanomaterial QPEI / SiO 2 , its structural representation is:

[0032]

[0033] In the formula: nano-SiO 2 ;

[0034] A preparation method for functional silicon dioxide nanomaterials, comprising the following steps:

[0035] A. Surface modification of silica nanomaterials: Disperse silica with a particle size of 100 nm in methanol, measure an appropriate amount of γ-chloropropyltriethoxysilane, and add it to a three-necked flask, wherein the silica The mass ratio of nanomaterials, γ-chloropropyltriethoxysilane, and alcohol is 1: 0.5: 6, stirred, heated, and refluxed at a constant temperature of 66 °C for 8 h, so that the chloropropyl groups are coupled in the silica nanomaterials surface; after the reaction is completed, centrifuge and wash with methanol, and dry the washed product at a constant temperature of 100 °C for 12 h to obtain chloropropylated silica nanomaterials;

[0036] The reaction formula of step A is as follows:

[0037]

...

Embodiment 2

[0065] A functional silica nanomaterial QPEI / SiO 2 , the structural representation is the same as in Example 1.

[0066] A preparation method of functional silicon dioxide nanomaterials, comprising the following steps:

[0067] A. Surface modification of silica nanomaterials: Disperse silica with a particle size of 120nm in ethanol, measure an appropriate amount of γ-chloropropyltriethoxysilane, and add it to a three-necked flask, wherein the silica nano The mass ratio of the material, γ-chloropropyltriethoxysilane, and alcohol is 1:0.5:6, stirred, heated, and refluxed at 80 °C for 10 h, so that the chloropropyl group is coupled on the surface of the silica nanomaterial ; After the reaction is completed, centrifuge and wash with methanol, and dry the washed product at a constant temperature of 120 ° C for 15 h to obtain chloropropylated silica nanomaterials;

[0068] B. Surface-modified silica nanomaterials grafted with polyethyleneimine (PEI): disperse chloropropylated sili...

Embodiment 3

[0075] A functional silica nanomaterial QPEI / SiO 2 , the structural representation is the same as in Example 1.

[0076] A preparation method for functional silicon dioxide nanomaterials, comprising the following steps:

[0077] A. Surface modification of silica nanomaterials: Disperse silica with a particle size of 150nm in propanol, measure an appropriate amount of γ-chloropropyltriethoxysilane, and add it to a three-necked flask, wherein the silica The mass ratio of nanomaterials, γ-chloropropyltriethoxysilane, and alcohol is 1: 1: 8, stirred, heated, and refluxed at a constant temperature of 88 °C for 12 h, so that the chloropropyl groups are coupled in the silica nanomaterials surface; after the reaction is completed, centrifuge and wash with propanol, and dry the washed product at a constant temperature of 150 °C for 18 h to obtain chloropropylated silica nanomaterials;

[0078] B. Surface-modified silica nanomaterials grafted with polyethyleneimine (PEI): disperse chl...

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Abstract

The invention discloses a preparation method and application of functional silica nano material. A preservative uses silica nano material as carrier with surface grafting high polymer ammonium. The preparation method includes: surface modification of silica nano material, grafting polyethylenimine to the surface modified silica nano material, synthesizing QPEI / SiO2 (quaternary ammonium polyethylenimine / SiO2) nano material, and synthesizing PEI-QPEI (polyethylenimine-QPEI) / SiO2 nano material. Advantages of silica nano material and high polymer material are combined, quaternary ammonium functional group is relatively concentrate on the surface of the absorbent, a large amount of electro pairs are formed along with anionic dye such as methyl orange, dye wastewater can be treated more efficiently and rapidly, and the absorbent can be used in a wider pH range.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, and more specifically relates to a functional silicon dioxide nanomaterial, a preparation method and an application thereof. Background technique [0002] With the rapid development of nanotechnology, nanomaterials are widely used because of their high specific surface area. Among many nanomaterials, silica nanomaterials are stable, reusable, high in mechanical It is widely used because of its large surface area. However, the adsorption capacity of unmodified silica nanomaterials is not large enough to meet the requirements of commercial applications, and it needs to be modified. [0003] With the development of science and technology, the problem of water pollution has become more and more serious, dye wastewater has become one of the most important sources of water pollution. Many industries, such as textiles, paper and plastics, discharge a large amount of dye wastewater during the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C08F292/00C08F8/00C02F1/28C02F1/58
Inventor 刘金水马诗臧灵杰
Owner 中琦(广东)硅材料股份有限公司