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Method for preparing one-dimensional magnetic fluorescent nanochain

A nano-chain, high-magnetic technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problem that dipole interactions are difficult to maintain the orderly structure of superparamagnetic nanoparticles

Inactive Publication Date: 2013-06-26
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the weak or even negligible anisotropic dipole interactions make it difficult to maintain the ordered structure of these superparamagnetic nanoparticles when the external magnetic field is removed.

Method used

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  • Method for preparing one-dimensional magnetic fluorescent nanochain
  • Method for preparing one-dimensional magnetic fluorescent nanochain
  • Method for preparing one-dimensional magnetic fluorescent nanochain

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In a 100mL reactor equipped with a condenser, add 70g of acetonitrile and 5g of ethanol; 0.04g of Fe 3 o 4 The microspheres were added to a 100mL reactor; a magnet with a magnetic field strength of 120Gs was added to the reactor; 0.06g GMA (glycidyl methacrylate), 0.06g DVB (divinylbenzene) and 0.03gNVCz ( Vinyl carbazole) and 0.007g of BPO (dibenzoyl peroxide), shake to dissolve, add to the reactor, mix well; gradually raise the temperature to 82 ° C, polymerize for 4 hours; magnetically separate the obtained product, pour Remove the supernatant, add anhydrous ethanol, ultrasonically disperse, and then perform magnetic separation; repeat this process several times to remove excess monomers and polymers. Vacuum drying at room temperature yields dark brown one-dimensional magnetic fluorescent nanochains.

[0026] The resulting one-dimensional magnetic fluorescent nanochains have a chain length of about 2 μm, a magnetic responsivity of 64 emu / g, and a magnetic content o...

Embodiment 2

[0028] In a 100mL reactor equipped with a condenser, add 78g of acetonitrile; 0.06g of Fe 3 o 4 The microspheres were added to a 100mL reactor; a magnet with a magnetic field strength of 400Gs was added to the reactor; 0.15g GMA (glycidyl methacrylate), 0.22g EGDMA (ethylene glycol dimethacrylate) were added to the beaker and 0.08g of NVCz (vinyl carbazole) and 0.018g of AIBN (azobisisobutyronitrile), after shaking and dissolving, add to the reactor and mix well; gradually heat up to 80°C, and polymerize for 1.5h; the obtained The product is subjected to magnetic separation, the supernatant liquid is poured off, anhydrous ethanol is added to disperse by ultrasonic, and then magnetic separation is carried out; repeated washing in this way is repeated several times to remove excess monomer and polymer. Vacuum drying at room temperature yields dark brown one-dimensional magnetic fluorescent nanochains.

[0029] The resulting one-dimensional magnetic fluorescent nanochains have ...

Embodiment 3

[0031] In a 100mL reactor equipped with a condenser, add 70g of acetonitrile, 5g of methanol and 5g of acetone; add 0.07g of Fe3O4 microspheres into the 100mL reactor; add a magnet with a magnetic field strength of 800Gs to the reactor; add 0.22g GMA (glycidyl methacrylate), 0.26g DVB (divinylbenzene), 0.12g NVCz (vinyl carbazole) and 0.015g BPO (dibenzoyl peroxide), after shaking and dissolving, add Put it into the reactor, mix well; gradually raise the temperature to 84°C, and polymerize for 3 hours; conduct magnetic separation on the obtained product, pour off the supernatant liquid, add absolute ethanol to disperse by ultrasonic, and then perform magnetic separation; repeat this way for several times, to remove excess monomer and polymer. Vacuum drying at room temperature yields dark brown one-dimensional magnetic fluorescent nanochains.

[0032] The resulting one-dimensional magnetic fluorescent nanochains have a chain length of about 5 μm, a magnetic responsivity of 40 ...

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Abstract

The invention relates to a method for preparing a one-dimensional magnetic fluorescent nanochain by the induced precipitation condensation of a magnetic field. The method taking monodisperse high-magnetic responsiveness Fe3O4, prepared by adopting a solvent thermal process, as a core (CN1645530) and taking GMA (glycidyl methacrylate) and polymerizable fluorescent monomer NVCz (vinylcarbazole) as functional monomers comprises the steps of: adding certain crosslinking monomers, self assembling through magnetic field induction, and preparing the one-dimensional magnetic fluorescent nanochain with clean surfaces and permanent links in the precipitation condensation process.

Description

technical field [0001] The invention relates to a preparation method of a one-dimensional magnetic fluorescent nano chain, and relates to a preparation method field of a one-dimensional high magnetic responsive fluorescent nano chain with epoxy groups on the surface. Background technique [0002] In recent years, magnetic nanoparticles have been widely used in the fields of bioseparation detection and controlled drug release due to their advantages of paramagnetism and biocompatibility. Assembling magnetic nanomaterials into one-dimensional nanochains to realize deviceization of magnetic nanomaterials has become a recent research hotspot. At present, the self-assembly method is a very effective method for preparing one-dimensional nanomagnetic materials, mainly including dipole-induced self-assembly, magnetic field-induced self-assembly and template-induced self-assembly. Among them, magnetic field-induced self-assembly is a simple and cheap method. However, the weak or ev...

Claims

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Application Information

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IPC IPC(8): C08F212/36C08F222/14C08F220/32C08F226/12C08F2/44C08K3/22C09K11/06
Inventor 张秋禹马明亮辛铁军刘梦娇许海龙张和鹏王雯雯
Owner NORTHWESTERN POLYTECHNICAL UNIV
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