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Preparation method and application of hydrophilic magnetic nanometer material

A magnetic nano-hydrophilic technology, which is applied in the field of preparation of hydrophilic magnetic nano-materials, achieves the effects of good hydrophilicity and magnetic response, high reaction yield, and accelerated stripping process

Active Publication Date: 2018-08-10
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, purely bare Fe3O4 nano-cores often agglomerate due to their high specific surface energy.

Method used

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  • Preparation method and application of hydrophilic magnetic nanometer material
  • Preparation method and application of hydrophilic magnetic nanometer material
  • Preparation method and application of hydrophilic magnetic nanometer material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A kind of synthetic method of PEG modified nano ferric oxide, the steps are as follows:

[0054] ⑴Weigh 0.86g FeCl 2 4H 2 O and 2.34 g FeCl 3 ·6H 2 O was dissolved in 100mL of water, the temperature of the solution was adjusted to 60°C, and 20mL of ammonia water (5%) was slowly added dropwise under stirring at a nitrogen atmosphere of 500r / min, and reacted for 20min to obtain black iron ferric oxide nanoparticles. After the reaction product was separated by a magnet, it was washed twice with ethanol and water to remove excess reactants. The product was dispersed in alkali solution with pH=9.0 and ultrasonically dispersed for 30 minutes.

[0055] (2) Measure 14.00g of PEG600, heat at 90°C for 3h in an inert atmosphere to remove residual moisture, then evenly disperse it in 150mL of acetonitrile solvent, add 0.2mL of acetic acid as a catalyst, add 5.90g of KH560 dropwise, reflux at 90°C, react for 6h, the product Distill at 130 °C for 1 h to remove acetonitrile, aceti...

Embodiment 2

[0058] A kind of synthetic method of PEG modified nano ferric oxide, the steps are as follows:

[0059] ⑴Weigh 0.84g Fe(NH 4 ) 2 (SO 4 ) 2 ·6H 2 O and 0.86g Fe 2 (SO 4 ) 3 Dissolve in 100mL of water, adjust the solution temperature to 80°C, slowly add 15mL of ammonia water (5%) dropwise under a nitrogen atmosphere of 500r / min with stirring, and react for 20min to obtain black ferric oxide nanoparticles. After the reaction product was separated by a magnet, it was washed twice with ethanol and water to remove excess reactants. The product was dispersed in alkali solution with pH=9.0 and ultrasonically dispersed for 20 minutes.

[0060] (2) Take 14.00g of PEG600, heat at 90°C for 3h in an inert atmosphere to remove residual moisture, then evenly disperse it in 150mL of acetonitrile solvent, add 0.15mL of acetic acid as a catalyst, add 5.90g of KH560 dropwise, reflux at 90°C, react for 7h, the product Distill at 130 °C for 1 h to remove acetonitrile, acetic acid and exces...

Embodiment 3

[0063] A kind of synthetic method of PEG modified nano ferric oxide, the steps are as follows:

[0064] ⑴Weigh 0.43g FeCl 2 4H 2 O and 1.17 g FeCl 3 ·6H 2 Dissolve O in 50 mL of water, adjust the temperature of the solution to 60°C, slowly add 10 mL of NaOH (0.10 mol / L) solution dropwise under nitrogen atmosphere with stirring at 350 r / min, and react for 10 min to obtain black iron ferric oxide nanoparticles. After separating the reaction product with a magnet, wash it twice with methanol and water to remove excess reactants. The product is dispersed in alkali solution with pH=9.0 and ultrasonically dispersed for 10 minutes.

[0065] (2) Take 6.00g of PEG400, heat at 90°C for 3h under an inert atmosphere to remove residual moisture, then evenly disperse it in 120mL of acetonitrile solvent, add 0.15mL of acetic acid as a catalyst, add 4.21g of KH560 dropwise, reflux at 90°C, react for 6h, the product Distill at 130 °C for 1 h to remove acetonitrile, acetic acid and excess K...

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Abstract

The invention belongs to the technical field of nanometer materials, and mainly relates to a preparation method and application of a hydrophilic magnetic nanometer material. The preparation method andapplication of the hydrophilic magnetic nanometer material comprise preparation of a ferroferric oxide nanometer fluid, synthesis of polyethylene glycol (PEG) modified gamma-(2,3-epoxypropoxy)propyltrimethoxysilane (KH560), modification of the PEG-modified silane on the surface of the ferroferric oxide nanoparticles and application examples. The preparation process is simple, the production costis low, no by-products are produced, and the prepared nanoparticles are about 16 nm, and have the advantages of uniform particle size, good magnetic response, good hydrophilicity, non-toxicity and environmental friendliness. The nanofluid obtained through uniform dispersion of the nanoparticles can significantly reduce oil-water interfacial tension, and can improve solid mineral surface wettability, indicating a good application prospect of the nanofluid in the fields of oil-solid separation, tertiary oil recovery, drug carrier, polymer flooding, etc.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a preparation method and an application process of a hydrophilic magnetic nanomaterial. Background technique [0002] With the reduction of conventional fossil energy reserves worldwide, unconventional fossil energy accounts for an increasing proportion of energy. At present, the method of industrial utilization of unconventional fossil energy is mainly chemical reagent-assisted water washing. However, the traditional chemical assisted water washing method consumes a lot of heat energy and chemical additives, and produces an emulsion that is difficult to handle for subsequent use. In order to reduce process energy and water consumption, new and efficient methods are constantly emerging. Nanofluid displacement method has attracted more and more attention due to its advantages of low concentration, high stability and high activity. However, it is difficult for nanoparticles...

Claims

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Application Information

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IPC IPC(8): C10G29/16C01G49/08H01F1/44H01F41/02
CPCC01G49/08C10G29/16H01F1/445H01F41/0253
Inventor 何林李泓达李鑫钢隋红周泾泾张自生
Owner TIANJIN UNIV
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