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A kind of amphiphilic magnetic nanosphere and its preparation method and adsorption application

A magnetic nanosphere, amphiphilic technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., to achieve the effect of mild conditions, strong adsorption capacity, and good dispersibility

Active Publication Date: 2020-05-22
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there are no relevant reports on the technology of separating and enriching DOP in environmental water samples by amphiphilic magnetic adsorption materials.

Method used

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  • A kind of amphiphilic magnetic nanosphere and its preparation method and adsorption application
  • A kind of amphiphilic magnetic nanosphere and its preparation method and adsorption application
  • A kind of amphiphilic magnetic nanosphere and its preparation method and adsorption application

Examples

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Embodiment 1

[0032] A preparation method of amphiphilic magnetic nanospheres, comprising the following steps:

[0033] Step 1. Dissolve 1.38g of ferric chloride and 3.7g of anhydrous sodium acetate in a 50mL Teflon-lined stainless steel autoclave filled with 39mL of ethylene glycol. After stirring evenly, the reactor is kept at 203°C for 8.5h. After the reaction, cool down to room temperature naturally, wash the reaction product with ultrapure water until it is neutral, and dry it under vacuum at 45°C and 0.06MPa for 4.5h to obtain the magnetic Fe 3 o 4 Nanoparticles. like figure 1 As shown, the prepared magnetic Fe 3 o 4 The particle size of the nanospheres is about 200nm.

[0034] Step two, take by weighing the magnetic Fe that 0.2g step one makes 3 o 4Nanoparticles, 80mL water-ethanol solution in a 250mL three-neck flask, ultrasonically oscillated to make it evenly dispersed. 1.5 mL of 3-aminopropyltriethoxysilane and 1.5 mL of n-octyltriethoxysilane were added thereto, and mech...

Embodiment 2

[0045] A preparation method of amphiphilic magnetic nanospheres, comprising the following steps:

[0046] Step 1. Dissolve 1.25g of ferric chloride and 3.4g of anhydrous sodium acetate in a 50mL Teflon-lined stainless steel autoclave filled with 20mL of ethylene glycol. After stirring evenly, the reactor is kept at 180°C for 7h. After the reaction, cool down to room temperature naturally, wash the reaction product with ultrapure water until it is neutral, and dry it under vacuum at 40°C and 0.05MPa for 4 hours to obtain the magnetic Fe 3 o 4 Nanoparticles.

[0047] Step two, take by weighing the magnetic Fe that 0.10g step one makes 3 o 4 Nanoparticles, 70mL water-ethanol solution in a 250mL three-neck flask, ultrasonically oscillated to make it evenly dispersed. 0.5 mL of 3-aminopropyltriethoxysilane and 0.5 mL of n-octyltriethoxysilane were added thereto, and mechanically stirred at a rate of 200 r / min for 1 h at room temperature. After that, 4.0 mL of ammonia water was...

Embodiment 3

[0058] A preparation method of amphiphilic magnetic nanospheres, comprising the following steps:

[0059] Step 1. Dissolve 1.45g of ferric chloride and 3.8g of anhydrous sodium acetate in a 50mL Teflon-lined stainless steel autoclave filled with 35mL of ethylene glycol. After stirring evenly, the reactor is kept at 210°C for 9h. After the reaction, cool down to room temperature naturally, wash the reaction product with ultrapure water until it is neutral, and dry it under vacuum at 50°C and 0.09MPa for 7 hours to obtain the magnetic Fe 3 o 4 Nanoparticles.

[0060] Step two, take by weighing the magnetic Fe that 0.30g step one makes 3 o 4 Nanoparticles, 90mL water-ethanol solution in a 250mL three-necked flask, ultrasonically oscillated to make it evenly dispersed. 2.5 mL of 3-aminopropyltriethoxysilane and 2.5 mL of n-octyltriethoxysilane were added thereto, and mechanically stirred at a rate of 500 r / min for 3 h at room temperature. After that, 5.0 mL of ammonia water w...

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Abstract

The invention discloses amphipathic magnetic nanospheres as well as a preparation method and adsorption application thereof, and belongs to the technical field of nano material preparation and environment detection. Firstly, magnetic Fe3O4 nanospheres are synthesized by adopting a solvothermal method, and then under an alkaline condition, 3-aminopropyltriethoxysilane used as an amino-containing silylating reagent and triethoxyoctylsilane used as a long-chain alkyl-containing silylating reagent are grafted to the surface of a carrier through sol-gel action, thereby realizing amphipathic modification of the magnetic nanospheres at one step. The preparation method disclosed by the invention is simple, and mild in condition; the prepared amphipathic magnetic nanospheres are uniform in particlesize, high in stability and high in hydrophilcity, are high in adsorption property for dioctyl phthalate and high in adsorption speed, and can simply, efficiently and quickly realize removal and enrichment of the dioctyl phthalate in an environmental water sample.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation and environmental detection, and in particular relates to an amphiphilic magnetic nanosphere, a preparation method and an adsorption application thereof. Background technique [0002] Phthalate esters (PAEs), or plasticizers, have been widely used in many industrial products, mainly as polymer additives to improve plastics, medical devices, children's toys and food, etc. Plasticity of packaging products. Some studies have shown that PAEs act similarly to estrogen. Even at extremely low concentrations, PAEs may cause male feminization and disorders of genital development and maturation, affecting the balance of normal hormonal functions in animals and humans. Rodent laboratory tests have shown that high exposure to PAEs can damage the liver, kidneys and lungs. Furthermore, PAEs can easily leach from plastic packaging and enter the environment. The U.S. Environmental Protection ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06B01J20/28B01J20/30C02F1/28C02F101/34
CPCB01J20/06B01J20/28009B01J20/28019C02F1/281C02F2101/34
Inventor 高瑞霞高路瑶唐骁爽张军杰
Owner XI AN JIAOTONG UNIV