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A preparation method of fe3o4/sio2/pani nanoparticles with core-shell structure

A nanoparticle and shell structure technology, applied in nanotechnology, microsphere preparation, microcapsule preparation, etc., can solve problems such as poor dispersibility and inability to meet application requirements.

Active Publication Date: 2016-04-13
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Nano Fe 3 o 4 Both polyaniline and polyaniline have good magnetic and electrical properties, and are often used as functional additives to make electromagnetic shielding materials, but due to density and surface characteristics, their dispersion in polymer materials is not good; at the same time, the existing single material The way of adding, its function often cannot meet the requirements of use when it is applied

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0010] Weigh 4.05gFeCl 3 ·6H 2 O and 1.99gFeCl 2 4H 2 O, join in 50ml deionized water, stir to dissolve and join in the there-necked flask with thermometer, stirrer, logical N 2 , NH was slowly added dropwise under vigorous stirring 3 ·H 2 O to adjust the pH value to 9, continue to stir for 0.5h and then stop the reaction. After aging for 3h in an oil bath at 80°C, add 0.5g PEG4000 and stir for 10min. Use a high-speed centrifuge to separate the precipitate Fe 3 o 4 , and then continue to wash repeatedly with deionized water and ethanol until the pH value is about 7, and after vacuum drying at 60°C, the product is nano-Fe 3 o 4 .

[0011] In a three-necked flask with a thermometer and a stirrer, add 0.05g of nano-Fe 3 o 4 and 100g of water, ultrasonically disperse for 1 hour, start stirring, adjust the pH to about 10 with ammonia water, weigh a certain amount of tetraethyl orthosilicate and 50.0g of ethanol, slowly drop them into a three-necked flask with a dropping f...

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PUM

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Abstract

The invention discloses a preparation method of a Fe3O4 / SiO2 / PANI (Polyaniline) nano particle with a core-shell structure and belongs to the technical field of nano new materials. The nano materials prepared by the method are excellent in magnetic and electric properties; meanwhile, due to a nanometer effect, the nano materials have an effect of increasing absorption of electromagnetic wave, so that the nano materials can be applied to the field of electromagnetic shielding materials. The preparation method of the Fe3O4 / SiO2 / PANI (Polyaniline) nano particle with the core-shell structure comprises the steps of preparing a Fe3O4 nano particle through a coprecipitation method firstly, coating the surface of the Fe3O4 nano particle with a layer of SiO2 through a sol-gel method, preparing a SiO2-coated Fe3O4 nano particle and coating the outer layer with PANI through an emulsion polymerization method on the basis to prepare a Fe3O4 / SiO2 / PANI nano particle with the core-shell structure having magnetic and electric functions.

Description

technical field [0001] This product belongs to the field of organic / inorganic composite nanomaterials and involves a Fe with a core-shell structure 3 o 4 / SiO 2 The preparation method of / PANI nanometer material. Background technique [0002] Nano Fe 3 o 4 Both polyaniline and polyaniline have good magnetic and electrical properties, and are often used as functional additives to make electromagnetic shielding materials. However, due to density and surface characteristics, their dispersion in polymer materials is not good; at the same time, the existing single material The way of adding, its function often can't meet the requirements of use when it is applied. Based on this, the present invention attempts to prepare a core-shell structure nanopowder material with both magnetic and electrical functions through the coating treatment of various functional materials to achieve multifunctional synergistic compounding to improve its performance and solve the problem of nanomat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/02B82Y40/00
Inventor 姚伯龙齐家鹏齐会民张国标韩兵倪才华王利魁
Owner JIANGNAN UNIV