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Magnetic nanocomposite and preparation method thereof

A technology of composite magnetic and nanomaterials, applied in the direction of magnetic materials, magnetic objects, chemical instruments and methods, etc., can solve the problems of lack of magnetic composite nanomaterials and numerous steps, so as to improve the preparation efficiency, be suitable for mass production, and simplify the preparation The effect of the program

Active Publication Date: 2013-10-23
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the methods that have been reported to prepare composite nanomaterials with long-chain flexible coupling agents with multifunctional groups have many steps and are only applicable to one or a certain type of nanomaterials (for example, metal Adv.Synth.Catal ., 2007, 349, 1917-1922; Green Chem., 2009, 11, 127-131) and magnetic components, lack of universal methods to prepare magnetic composite nanomaterials
The research on the effective combination of various types of nanomaterials and magnetic materials using a long-chain flexible organic molecule with multiple functional groups has not been reported yet.

Method used

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  • Magnetic nanocomposite and preparation method thereof
  • Magnetic nanocomposite and preparation method thereof
  • Magnetic nanocomposite and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] 1) Add 0.15mol·L -1 Polyacrylic acid (molecular weight 1000-120,000), 0.1mol·L -1 FeCl 3 ·6H 2 O, 1mol L -1 NaAc and 0.3mol L -1 NaOH was sequentially added to 35ml of ethylene glycol, and stirred at room temperature until a uniform suspension was formed; the resulting suspension was transferred to a 50ml automatic pressure-relieving stainless steel high-pressure digestion tank with a polytetrafluoroethylene liner (Binhai County Zhenghong Plastic Factory) , model: 50ml), reacted at 200°C for 24h, cooled naturally to room temperature; magnetically separated the obtained black solid under the action of an external magnetic field, and cleaned the sample with a mixed solution of ethanol and water under ultrasonic conditions, such that magnetic separation-ultrasonic cleaning 3 to 5 times; the resulting solid is dried under vacuum to obtain Fe 3 o 4 / PAA nanoclusters;

[0045] 2) Add 0.15g Fe 3 o 4 / PAA added to 10ml 0.1mol L -1 Ce(NO 3 ) 2 ·6H 2 O aqueous soluti...

Embodiment 2

[0048] 1) Repeat step 1) of Example 1, the only difference is that no NaOH is added, the reaction temperature is 220°C, and the reaction time is 12h;

[0049] 2) Add 0.08Fe 3 o 4 / PAA added to 40ml 0.125molL -1 Cu(Ac) 2 ·H 2 In ethanol solution of O, stir at room temperature for 0.5h; add (NH 2 ) 2 CO, so that the final concentration is 0.025molL -1 , stirred at room temperature for 0.5h; the resulting mixed solution was transferred to a 50ml stainless steel high-pressure digestion tank with a polytetrafluoroethylene liner (Binhai County Zhenghong Plastic Factory, model: 50ml), and reacted at 180°C for 1h; the obtained solution Placed at room temperature for natural cooling to obtain a black solid;

[0050] 3) Magnetically separate the obtained black solid from the solution system under the action of an external magnetic field, and wash it with a mixed solvent of ethanol and water, and go through a magnetic separation-cleaning cycle for 3-5 times, and finally place the ...

Embodiment 3

[0052] Repeat Example 2, the difference is only that the amount of NaAc in step 1) is 2mol L -1 , step 2) reacted at 180°C for 12h to obtain a composite magnetic nanomaterial: Fe 3 o 4 / PAA / Cu 2 O.

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Abstract

The invention discloses a magnetic nanocomposite and a preparation method thereof. The preparation method comprises the following steps of: with a polyacrylic acid (PAA) modified ferrate magnetic nanocluster MFe2O4 / PAA(M=Fe, Co, Ni, Mn, Zn, Cu) as well as metal-cation-contained nitrate, sulfate, acetate, chloride and the like as precursors, sufficiently stirring to enable the metal cations and the PAA modified ferrate magnetic nanocluster to be subjected to ligand complexing, then, providing proper anion-contained reagents such as sulfide, hydroxide, fluoride, haloid and the like, and next, carrying out treatment by means of stirring, ultrasonic waves, solvothermal operation and the like to obtain the magnetic nanocomposite with the PAA as a coupling agent.

Description

technical field [0001] The invention relates to a class of materials and a preparation method thereof, in particular to a class of composite magnetic nanometer materials and a preparation method thereof. Background technique [0002] Due to the four major physical effects of surface effect, small size effect, quantum size effect, and macroscopic quantum tunneling effect, nanomaterials show different optical, electrical, and magnetic properties from macroscopic bulk materials. It has broad application prospects in the fields of medicine, national defense and aerospace. Composite nanomaterials generally refer to materials containing two or more different phases, at least one of which has one dimension at the nanometer scale. Composite nanomaterials are an effective way to realize functionally integrated nanomaterials, which greatly broaden the application fields of nanomaterials. There are many types of composite nanomaterials, among which composite magnetic nanomaterials ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28B01J31/34H01F1/00C08L33/02C08K3/22C08K3/30C08K3/24C08K3/16C08K3/08
Inventor 张铁锐张东慧梁运辉尚露卞僮余慧军吴骊珠佟振合
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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