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A method for preparing magnetic nanoparticles using ionic liquid as a template

A technology of magnetic nanoparticles and ionic liquids, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as strong toxicity, difficult temperature control, wide particle size distribution, etc., and achieve repeatability Strong, easy to operate, narrow distribution effect

Active Publication Date: 2015-09-23
淮安聚友新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the commonly used aqueous chemical co-precipitation method is simple to operate and low in cost, the prepared Fe 3 o 4 The shape of nanoparticles is irregular, the particle size distribution is wide, and because of its large specific surface area, it is easy to cause agglomeration
The pyrolysis method requires high equipment, the temperature is not easy to control, and the cost of reaction raw materials is high, the toxicity is strong, and the product output is low

Method used

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  • A method for preparing magnetic nanoparticles using ionic liquid as a template
  • A method for preparing magnetic nanoparticles using ionic liquid as a template
  • A method for preparing magnetic nanoparticles using ionic liquid as a template

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of ionic liquid template

[0034] in N 2 Mix 75mmol of N-methylimidazole and 75mmol of n-butane chloride at a temperature of 90°C and react for 7 hours in an atmospheric environment; the product after the reaction is recrystallized from acetone, and a white solid, namely 1-butyl -3-Methylimidazolium chloride salt ionic liquid, the obtained imidazole chloride salt ionic liquid and 73mmol of sodium tetrafluoroborate carry out anion exchange to obtain ionic liquid template agent 1-butyl-3-methylimidazolium tetrafluoroboric acid Salt [Bmim] BF 4 .

[0035] (2) Magnetic nanoparticles Fe 3 o 4 preparation of

[0036] FeSO 4 ·7H 2 O and FeCl 3 ·6H 2 O is mixed according to the ratio of 1:1 by mass ratio, and then 70ml of deionized water is added, and then the prepared mixture is added with ionic liquid template agent 1-butyl-3-methylimidazolium tetrafluoroboron according to the ratio of mass ratio of 3:100 Salt [Bmim]BF 4 The above mixture was stirre...

Embodiment 2

[0038] (1) Preparation of ionic liquid template

[0039] in N 2 Mix 75mmol of N-methylimidazole and 75mmol of n-butane chloride at a temperature of 90°C and react for 7 hours in an atmospheric environment; the product after the reaction is recrystallized from acetone, and a white solid, namely 1-butyl -3-methylimidazolium chloride salt ionic liquid, the obtained imidazole chloride salt ionic liquid is anion-exchanged with 73mmol of sodium hexafluorophosphate, and the ionic liquid template agent 1-butyl-3-methylimidazolium hexafluorophosphate is obtained [Bmim] PF 6 .

[0040] (2) Magnetic nanoparticles Fe 3 o 4 preparation of

[0041] FeSO 4 ·7H 2 O and FeCl 3 ·6H 2 O is mixed according to the ratio of 1:1 in mass ratio, and then 70ml of deionized water is added, and then the prepared mixture is added into the ionic liquid template agent 1-butyl-3-methylimidazolium hexafluorophosphoric acid according to the ratio of mass ratio of 3:100 Salt [Bmim] PF 6 The above mix...

Embodiment 3

[0043] (1) Preparation of ionic liquid template

[0044] in N 2 Mix 75mmol of N-methylimidazole and 75mmol of n-butane chloride at a temperature of 90°C and react for 7 hours in an atmospheric environment; the product after the reaction is recrystallized from acetone, and a white solid, namely 1-butyl -3-Methylimidazolium chloride salt ionic liquid, the obtained imidazole chloride salt ionic liquid is anion-exchanged with 73 mmol of bis(trifluoromethanesulfonyl)imide lithium, and the ionic liquid template agent 1-butyl-3- Methylimidazole bis(trifluoromethanesulfonyl)imide salt [Bmim]TFSI.

[0045] (2) Magnetic nanoparticles Fe 3 o 4 preparation of

[0046] FeSO 4 ·7H 2 O and FeCl 3 ·6H 2 O is mixed in a ratio of 1:1 according to the mass ratio, and then 70ml of deionized water is added, and then the prepared mixture is added into the ionic liquid template agent 1-butyl-3-methylimidazole bis(three Fluoromethanesulfonyl)imide salt [Bmim]TFSI; the above mixture was stirr...

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Abstract

The invention discloses a method for preparing a magnetic nanoparticle by using ionic liquid as a template agent. The method comprises the following steps of preparing a nanoscale magnetic Fe3O4 particle by using ionic liquid as the template agent and using FeSO4.7H2O and FeCl3.6H2O as materials through a chemical coprecipitation method; mixing the FeSO4.7H2O with FeCl3.6H2O, adding deionized water and then adding the ionic liquid template agent; stirring the mixture for 0.5-3 hours at the temperature of 40 DEG C-100 DEG C and at the stirring speed of 1200r / min, and adding ammonia water to adjust the pH value of the reactants to be 8-11, further stirring fiercely for 0.5-3 hours under the condition that the stirring speed is 1200r / min until the color of the reaction mixture is changed into black, and stopping the stirring; ultrasonically cleaning five times with the power of 200W, wherein cleaning at every time keeps 1 minute, separating the substances by a magnet after the cleaning is finshed, and vacuum drying for 7-12 hours at the temperature of 50 DEG C-100 DEG C. The Fe3O4 nanoparticle of the prepared magnetic nanoparticle is smaller in particle diameter and narrower in distribution, has superparamagnetism; the method has the characteristics of strong repeatability and low cost, and is simple and feasible.

Description

technical field [0001] The invention relates to the technical field of nanomaterial production, in particular to a method for preparing magnetic nanoparticle using ionic liquid as a template. Background technique [0002] Magnetic nanoparticles are more and more widely used in many fields, such as in magnetic recording materials, magnetic nanoparticles can be used to prepare high-density magnetic recording materials. In the field of biotechnology, magnetic nanoparticles can be used for DNA, protein and magnetic immune cell separation. In addition, magnetic nanoparticles can also be used for magnetic resonance imaging, drug release control and so on. Magnetic nanoparticles Fe 3 o 4 There are two commonly used preparation methods: aqueous chemical co-precipitation method and pyrolysis method. Although the commonly used aqueous phase chemical co-precipitation method is simple to operate and low in cost, the prepared Fe 3 o 4 The shape of nanoparticles is irregular, the pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/08B82Y30/00
Inventor 张利锋宋巧兰张金振刘毅郭守武
Owner 淮安聚友新能源科技有限公司