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Preparation method for magnetic macromolecule nanoball

A polymer nanosphere and magnetic technology, which is applied in the preparation of microspheres, magnetic materials, magnetic objects, etc., can solve the problem of time-consuming, and achieve the effects of easy magnetic separation and recovery, good superparamagnetic properties, and saving time and cost.

Active Publication Date: 2015-12-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical co-precipitation method is generally carried out in three steps, and each step takes 1 to 2 days to dry the corresponding product, which is quite time-consuming

Method used

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  • Preparation method for magnetic macromolecule nanoball
  • Preparation method for magnetic macromolecule nanoball
  • Preparation method for magnetic macromolecule nanoball

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Continuous and rapid preparation of embodiment 1 magnetic polymer nanosphere

[0033] (1) High-performance magnetic nanospheres (ie Fe 3 o 4 Preparation of Nanoparticle Ferrofluid)

[0034] Fe 3 o 4 Nanoparticles are prepared by an improved chemical co-precipitation method, and the reaction formula is

[0035] Fe 2+ +2Fe 3+ +8OH - → Fe 3 o 4 +4H 2 o

[0036] Specific process: weigh 4.054g FeCl respectively 3 ·6H 2 O and 1.988gFeCl 2 4H 2 O (considering Fe 2+ Oxidation in the preparation and subsequent process, select Fe 3+ / Fe 2+ The amount ratio of the substance is 3 / 2) in a 50mL beaker, add 25mL secondary ion exchange water to dissolve, then add 90mL secondary ion exchange water and mix to form a 115mL mixed solution, add the mixed solution into a 500mL three-necked bottle, Nitrogen was passed through, mechanically stirred (rotating speed 1000rpm) in a water bath at 30°C for 5min, and a syringe (diameter 0.7mm) was added dropwise with a mass concentr...

Embodiment 2

[0041] Example 2 Characterization of magnetic polymer nanospheres

[0042] (1) X-ray diffraction analysis (XRD) of magnetic polymer nanospheres

[0043] figure 2 Middle diffraction peak position and intensity result are all consistent with the standard data of powder diffraction JCPDS card (#85-1436), show that the magnetic polymer nanosphere prepared by the method of Example 1 belongs to single-phase Fe 3 o 4 Spinel structure (cubic system). There are obvious diffraction peaks at 2θ of 30.1°, 35.4°, 57.0° and 62.6°. For (220), (311), (511) and (440) crystal planes respectively, comparing the PDF card, it can be seen that the main Composition is Fe 3 o 4 , and it can be seen that Fe 3 o 4 The cubic sharpstone structure, combined with the Scherer formula, can also approximate the particle size. The Scherer formula is expressed as formula (2):

[0044] D h k 1 = ...

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Abstract

The invention provides a preparation method for a magnetic macromolecule nanoball. The preparation method comprises the following steps of: adding ferric chloride hexahydrate and iron dichloride tetrahydrate into water to prepare a mixed solution, dropwise adding ammonia water and a polyethylene glycol-4,000 aqueous solution for reaction, and carrying out ultrasonic dispersion and magnetic separation after reaction to obtain a Fe3O4 nanopraticle magnetic fluid; mixing the Fe3O4 nanopraticle magnetic fluid with absolute ethyl alcohol, the water and the ammonia water, dropwise adding tetraethyl orthosilicate after ultrasonic dispersion, carrying out magnetic separation after room-temperature reaction, collecting sediment and immersing the sediment in a hydrochloric acid solution, and carrying out magnetic separation after immersion to obtain a Fe3O4 composite nanopraticle magnetic fluid; and adding the Fe3O4 composite nanopraticle magnetic fluid into the absolute ethyl alcohol, adding the ammonia water after magnetic separation, dropwise adding 3-aminopropyltriethoxysilane for reaction, and carrying out magnetic separation after reaction to obtain the magnetic macromolecule nanoball. The method can be continuously and rapidly carried out, the time cost is low, the operation stability is high, the prepared magnetic macromolecule nanoball has excellent superparamagnetism, and magnetism is easy to separate and recycle.

Description

(1) Technical field [0001] The invention relates to a continuous and rapid preparation method of magnetic polymer nanospheres. (2) Background technology [0002] Nanomaterials refer to materials with at least one dimension in the nanoscale range in three-dimensional space or made of them as basic units. Special properties, where Fe 3 o 4 Nanoparticles have both the advantages of magnetic particles and nanoparticles, and their application prospects are more extensive. Therefore, on the basis of existing technology, explore the preparation of Fe 3 o 4 The influencing factors of nanoparticles are of practical significance. [0003] Currently, Fe 3 o 4 There are many methods for the preparation of nanoparticles, mainly including: mechanical grinding method, precipitation method, microemulsion method, solvothermal method, sol-gel method, thermal decomposition of organic matter method, etc. Each method has its own advantages and disadvantages, among which the chemical co-p...

Claims

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Application Information

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IPC IPC(8): H01F41/02H01F1/00B01J13/02
Inventor 章晓波宋崇富
Owner ZHEJIANG UNIV
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