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Preparation method of polyacrylic-acid modified water-soluble ferrite nano-cluster

A polyacrylic acid and nanocluster technology, applied in chemical instruments and methods, magnetic materials, magnetic objects, etc., can solve the problems of poor stability of nanoparticles, complicated preparation process, harsh operating conditions, etc., saving preparation time, convenient and rich. Set, high-yield effect

Inactive Publication Date: 2012-06-20
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

[0003] At present, the method for preparing water-soluble magnetic nanomaterials mainly includes: (1) high temperature and normal pressure liquid phase method: carry out high temperature and normal pressure liquid phase reaction under the condition that surfactant exists (referring to literature: Chem.Eur.J., 2007 , 13, 7153-7161), but this method has shortcomings such as low yield and harsh operating conditions (such as water removal and oxygen removal); (2) Surface modification method: a. Utilize amphiphilic surfactant molecules and oil The interaction between ligand molecules on the surface of soluble nanoparticles (see literature: Science, 2004, 304, 567-571; J.Am.Chem.Soc.2007, 129, 2871-2879); b. using polar hydrophilic The ligand molecule of the group replaces the non-polar ligand molecule on the surface of the oil-soluble nanoparticle (see literature: Nano Lett., 2007, 7, 3203-3207; Langmuir, 2011, 27, 8990-8997), and the nanoparticle transfer dissolved in water
The nanoparticles obtained by this scheme usually have poor stability, low yield, and there are problems such as complicated preparation process.

Method used

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  • Preparation method of polyacrylic-acid modified water-soluble ferrite nano-cluster
  • Preparation method of polyacrylic-acid modified water-soluble ferrite nano-cluster
  • Preparation method of polyacrylic-acid modified water-soluble ferrite nano-cluster

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Experimental program
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Effect test

Embodiment 1

[0032] 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;

[0033] 2) Transfer the obtained suspension to a 50ml automatic pressure-relieving stainless steel high-pressure digestion tank (Binhai County Zhenghong Plastic Factory, model: 50ml) with a polytetrafluoroethylene liner, react at 200°C for 24h, and naturally cool to room temperature ;

[0034] 3) The obtained black solid is magnetically separated under the action of an external magnetic field, and the sample is cleaned under ultrasonic conditions with a mixed solution of ethanol and water, so that the magnetic separation-ultrasonic cleaning is performed 3 to 5 times; the obtained solid is dispersed in 5ml of water, and the size is 182.1nm polyacrylic acid-modified Fe 3 o 4 Stable aqueous solutions of nanoclus...

Embodiment 2

[0041] Example 1 was repeated, the only difference being that no NaOH was added, the reaction temperature was 220° C., and the reaction time was 12 h. The resulting polyacrylic acid-modified water-soluble Fe 3 o 4 The average size of the nanoclusters is 97.7 nm.

Embodiment 3

[0043] Repeat Example 2, the only difference is that the amount of NaAc is 2mol L -1 . The resulting polyacrylic acid-modified water-soluble Fe 3 o 4 The average size of the nanoclusters is 52.7 nm.

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Abstract

The invention discloses a preparation method of a polyacrylic-acid modified water-soluble ferrite nano-cluster, belonging to the field of the preparation of nano-material. The water-soluble superparamagnetic MFe2O4 (M=Fe, Co, Ni, Cu, Mn and Zn) nano-cluster is obtained by adjusting the pH value of reaction solution by using the hydroxide and the acetate of alkali metals or alkaline earth metals and carrying out thermal treatment to the solvent of the system, wherein the FeCl3.6H2O, the CoCl2.6H2O and the like are used as precursors, and the polyacrylic acid with hydrophilic groups is used as a surfactant. The grain size of the nano-cluster can be adjusted in the range of 33.7-1909.8nm by changing the preparation parameters such as the reaction concentration, the reaction time, the reaction temperature and the like. The prepared MFe2O4 (M=Fe, Co, Ni, Cu, Mn and Zn) nano-cluster has stable dispersibility in aqueous solution and is easy to be enriched in the external magnetic field. The preparation method of the polyacrylic-acid modified water-soluble ferrite nano-cluster solves the problems of complex preparation process and high cost of the water-soluble magnetic nano-cluster and has wide application prospect in the filed of targeted medicament delivery and magnetic hyperthermia.

Description

technical field [0001] The invention relates to a preparation method of nanomaterials, in particular to a preparation method of polyacrylic acid-modified water-soluble ferrite nanoclusters. Background technique [0002] Nanoscience is recognized as one of the most promising research fields in the 21st century. Due to their small size and large specific surface area, compared with traditional bulk materials, nanomaterials show unique properties in terms of light, electricity, heat, magnetism, and force. The application of the field has attractive prospects, and it also opens up new ways to overcome some long-standing problems in the field of materials science research. But there are not many mature nanotechnology at present, and the development of nanomaterials with specific properties is still an important research direction in the field of nanoscience. Water solubility is a prerequisite for nanomaterials to be applied in the fields of biology and medicine. Ferrite nanocl...

Claims

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Application Information

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IPC IPC(8): C01G49/00H01F1/00
Inventor 张铁锐张东慧尚露吴骊珠佟振合
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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