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One-dimensional ferroferric oxide magnetic nano chain and preparation method thereof

A technology of ferric tetroxide and magnetic nano-chain, applied in the direction of iron oxide/ferric hydroxide, ferrous oxide, etc., can solve the problems of dimensional nanostructure damage, complex preparation process, poor environmental stability, etc. The effect of magnetic field corresponding strength, high T2 relaxation rate, and biocompatibility improvement

Inactive Publication Date: 2010-11-17
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although these methods have achieved success in the preparation of one-dimensional magnetic nanomaterials, the disadvantage of the above-mentioned technologies is that their environmental stability is poor. When one-dimensional materials are prepared by layer-by-layer wrapping methods, these nanoparticles are easy to fall off if they cannot be wrapped well.
Secondly, the nature of the polymer surface ligands will affect the dispersion stability of one-dimensional nanomagnetic materials in different solvents.
At the same time, these ligand polymers are easy to dissolve and fall off in some good solvent environments, resulting in the destruction of one-dimensional nanostructures.
If cross-linked polymers are used as ligands, the entire preparation process is more complicated, toxic and expensive

Method used

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  • One-dimensional ferroferric oxide magnetic nano chain and preparation method thereof
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  • One-dimensional ferroferric oxide magnetic nano chain and preparation method thereof

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Embodiment 1

[0030] Embodiment 1: as figure 1 As shown, a one-dimensional magnetic nanochain with a diameter of 194.9nm and positively charged superparamagnetic iron tetraoxide nanocrystal clusters wrapped in a polyphosphazene shell with a thickness of 11nm was prepared.

[0031] 1. Preparation of superparamagnetic iron tetraoxide nanocrystal clusters (194.9±10.8nm in diameter) with positive charges on the surface

[0032] FeCl 3 .6H 2 O (1.35 g, 5 mmol) was dissolved in ethylene glycol (40 mL) to give a clear solution. Then anhydrous sodium acetate (3.6g) and 1,2-ethylenediamine (10mL) were added to the solution successively, and the magnetic stirrer was vigorously stirred for 30 minutes to make the solution uniform, and 30mL of Teflon was taken out and added to the hydrothermal kettle. Inside the tube, sealed. The hydrothermal kettle was put into a constant temperature oven at 200° C. for 8 hours to react. After the reaction is over, wash the black product with absolute ethanol, use...

Embodiment 2

[0037] Embodiment 2: as figure 1 As shown, a one-dimensional magnetic nanochain with a diameter of 194.9nm and positively charged superparamagnetic iron tetraoxide nanocrystal clusters wrapped in a polyphosphazene shell with a thickness of 20nm was prepared.

[0038] 1. Preparation of superparamagnetic iron tetraoxide nanocrystal clusters (194.9±10.8nm in diameter) with positive charges on the surface

[0039] The preparation method of the positively charged superparamagnetic ferric oxide nanocrystal clusters with a diameter of 194.9 nm is the same as that described in Example 1-1.

[0040] 2. Preparation of one-dimensional magnetic nanochains (PZS shell thickness is 20nm)

[0041] The above-mentioned positively charged, superparamagnetic iron tetraoxide nanocrystal cluster (100mg), hexachlorotripolyphosphazene (12mg) and 4,4'-dihydroxydiphenyl sulfone (27mg), its mass ratio is 100 : 12: 27, drop into the volume ratio is 1: 1, in the mixed solution of absolute ethanol and te...

Embodiment 3

[0043] Embodiment 3: as figure 1 As shown, a one-dimensional magnetic nanochain with a diameter of 194.9nm and positively charged superparamagnetic iron tetraoxide nanocrystal clusters wrapped in a polyphosphazene shell with a thickness of 35nm was prepared.

[0044] 1. Preparation of superparamagnetic iron tetraoxide nanocrystal clusters (194.9±10.8nm in diameter) with positive charges on the surface

[0045] The preparation method of superparamagnetic ferriferrous oxide nanocrystal clusters with a diameter of 194.9 nm and a positive charge on the surface is the same as that described in Example 1-1.

[0046] 2. Preparation of one-dimensional magnetic nanochains (PZS shell thickness is 35nm)

[0047] The above-mentioned positively charged, superparamagnetic iron tetraoxide nanocrystal cluster (100mg), hexachlorotripolyphosphazene (20mg) and 4,4'-dihydroxydiphenyl sulfone (45mg), its mass ratio is 100 : 20: 45, drop into the volume ratio is 1: 1, in the mixed solution of abs...

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Abstract

The invention relates to a one-dimensional ferroferric oxide magnetic nano chain and a preparation method thereof in the technical field of nanometer. The preparation method comprises the following steps: putting ferroferric oxide nano druses into a mixed solution of absolute ethyl alcohol and tetrahydrofuran for ultrasonic dispersion; respectively adding HCCP and BPS in the solution for further ultrasonic dispersion, and finally adding triethylamine; and preparing the one-dimensional ferroferric oxide magnetic nano chain packed by loop crosslinking type polyphosphazenes after the reaction at room temperature. The one-dimensional magnetic nano material has excellent dispersion stability in water and polar solvents such as ethanol, acetone, tetrahydrofuran and the like, and is convenient for the following-up surface modification and application; simultaneously, compared with the zero dimension ferroferric oxide nano druses, the one-dimensional ferroferric oxide magnetic nano material has high T2 relaxation rate, and excellent biological application value of magnetic separation and magnetic resonance imaging (MRI) and the like.

Description

technical field [0001] The invention relates to a material and a preparation method in the field of nanotechnology, in particular to a one-dimensional ferroferric oxide magnetic nano chain wrapped by ring-crosslinked polyphosphazene and a preparation method thereof. Background technique [0002] In recent years, zero-site nanomaterials have been assembled into one-dimensional or two-dimensional nanostructures through multi-level assembly, thus endowing one-dimensional or two-dimensional nanomaterials with very unique optical, electrical and magnetic properties. This regular and ordered assembly technology is becoming a scientific Frontier hotspots of research and application. Among them, the assembly of zero-dimensional magnetic nanomaterials into one-dimensional magnetic nanostructure materials has attracted widespread attention. So far, researchers have developed two strategies to prepare one-dimensional magnetic nanomaterials: one is the template method, that is, through...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08
Inventor 周俊峰孟令杰路庆华
Owner SHANGHAI JIAO TONG UNIV
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