Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for synthesizing high-dispersity magnetic nano ellipsoid

A magnetic nanometer and highly dispersive technology, applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of hindering the mass transfer of the system and the surrounding space, increasing costs and energy waste, and low dispersion of magnetic particle colloids. Achieve good colloidal dispersibility, save energy and improve dispersibility

Pending Publication Date: 2019-09-17
苏州善恩纳米功能材料科技有限公司
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the presence of a dense silica layer often hinders the mass transfer between the system and the surrounding space
Therefore, conversion usually requires harsh reaction conditions such as elevated temperature, which increases cost and energy waste
More importantly, high-temperature conversion leads to severe particle aggregation, resulting in low colloidal dispersion of magnetic particles

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for synthesizing high-dispersity magnetic nano ellipsoid
  • Method for synthesizing high-dispersity magnetic nano ellipsoid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0019] This example demonstrates the implementation process of one of the high-dispersion magnetic nano-ellipsoids. exist figure 1 are the TEM images of the morphology changes of the particles during each synthesis process. figure 2 Then it shows that the porous α-Fe 2 o 3 @SiO 2 The Zeta potentials of the obtained products are respectively -38, -34 and -26mV, which shows that α-Fe can be reduced at 300°C in the present invention 2 o 3 @SiO 2 The magnetic nano ellipsoid material is obtained, and the dispersibility is the best. In the present invention, the magnetic material particles are preferably prepared according to the method of hydrolyzing iron salt in the document J.Am.Chem.Soc. Dissolve sodium dihydrogen phosphate in 200 ml of water, and let it stand in a 100-degree oven for 2 days to obtain an ellipsoidal α-Fe with a size of 150 nm in major axis and 40 nm in minor axis 2 o 3 Particles, by adjusting the composition of the reaction solution and the reaction te...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for synthesizing a high-dispersity magnetic nano ellipsoid. The method comprises the following steps: 1) preparing alpha-Fe2O3 ellipsoid particles; 2) carrying PVP modification and silicon dioxide coating on the apha-Fe2O3 prepared in the 1); and 3) putting the dispersion liquid in the step 2) into hot water for etching to form porous silicon dioxide, collecting and drying; and 4) reducing the particles at 300 DEG C in an H2 atmosphere, and re-dispersing the particles in water to obtain the high-dispersity magnetic nano ellipsoid material. The particle colloid has good dispersity, and the porous silicon dioxide greatly improves the shell permeability. The method has the advantages of energy conservation, high dispersity, porous materials and wide application.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a method for preparing highly dispersed magnetic nano particle materials. Background technique [0002] The study of anisotropic magnetic nanoparticles with controllable morphology is very interesting and has been widely used in self-assembly, data storage, catalysis, magnetism, smart optical materials, biomedicine and pharmaceuticals. While the direct preparation method is limited, the non-magnetic chemical conversion template method provides an effective route for the synthesis of anisotropic magnetic particles with different morphologies. Unfortunately, transformation methods are often prone to undesirable morphological changes and agglomeration. Preventing structural deformation can be achieved by coating a layer of dense inorganic materials, such as coating a layer of silicon dioxide on a non-magnetic template. The silica shell provides spatial confinement for the transf...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/00H01F1/01H01F41/00
CPCH01F1/0054H01F1/01H01F41/00
Inventor 何乐全跃龙邵一帅
Owner 苏州善恩纳米功能材料科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com