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

A kind of monodisperse melamine resin magnetic microsphere and preparation method thereof

A technology of magnetic microspheres and melamine resin, which is applied in the field of magnetic materials, can solve the problems of wide particle size distribution of magnetic microspheres, weak magnetism, complex process, etc., and achieve a simple preparation method, low pollution, and good heat resistance. Effect

Active Publication Date: 2019-02-15
NANJING INST OF TECH
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a method for preparing monodisperse melamine resin magnetic microspheres in view of the problems of wide particle size distribution, weak magnetism and complex process of magnetic microspheres in the prior art

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
  • A kind of monodisperse melamine resin magnetic microsphere and preparation method thereof
  • A kind of monodisperse melamine resin magnetic microsphere and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step 1: Fe 2+ Adsorption of ions

[0031] Take the MF microspheres (dry weight about 1.4 g) after centrifugation and water washing, ultrasonically disperse them in 60 ml water for 5 min, then continue to heat and stir at 60 °C; 4 The solution was slowly added to it, so that the Fe in the solution 2+ The ion concentration is 0.4mol / L, after heating and stirring at 60°C for 1 hour, centrifuge to obtain Fe 2+ Ion-adsorbed MF microspheres.

[0032] Step 2: Fe 2+ Ion Transformation and Chen Hua Process

[0033] Disperse the MF microspheres obtained in step 1 in 60ml of water, adjust the pH to 8.0 with ammonia water, heat the mixture at 40°C for 4 hours, wash the sample after magnetic separation, and repeat 3 times to obtain the desired magnetic microsphere sample.

Embodiment 2

[0035] Step 1: Fe 2+ Adsorption of ions

[0036] Take the MF microspheres (dry weight about 1.4 g) after centrifugation and water washing, ultrasonically disperse them in 50 ml water for 5 min, then continue to heat and stir at 50 °C; 2 The solution was slowly added to it, so that the Fe in the solution 2+ Fe 2+ Ion-adsorbed MF microspheres.

[0037] Step 2: Fe 2+ Ion Transformation and Chen Hua Process

[0038] Disperse the MF microspheres obtained in step 1 in 50ml of water, adjust the pH to 10.0 with ammonia water, heat the mixture at 70°C for 5 hours, wash the sample after magnetic separation, and repeat 5 times to obtain the desired magnetic microsphere sample.

Embodiment 3

[0040] Step 1: Fe 2+ Adsorption of ions

[0041] Take the MF microspheres (dry weight about 1.4 g) after centrifugation and water washing, ultrasonically disperse them in 70 ml water for 5 min, then continue to heat and stir at 70 °C; 4 The solution was slowly added to it, so that the Fe in the solution 2+ Fe 2+ Ion-adsorbed MF microspheres.

[0042] Step 2: Fe 2+ Ion Transformation and Chen Hua Process

[0043]Disperse the MF microspheres obtained in step 1 in 60ml of water, adjust the pH to 11.0 with ammonia water, heat the mixture at 30°C for 6 hours, wash the sample after magnetic separation, and repeat 3 times to obtain the desired magnetic microsphere sample.

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 monodisperse melamine resin magnetic microsphere and a preparation method thereof. According to the method, the monodisperse melamine resin microsphere is used as a template, and the surface of the microsphere is coated with a Fe3O4 sphere shell with average particle size of 2 micrometers, so that the problem that Fe3O4 has large density is solved. The prepared magnetic microsphere has uniform particle size, good dispersity, high thermal stability, and good microwave absorption performance, and can be applied to the fields of spacecrafts, energy, biomedicines and the like.

Description

technical field [0001] The invention belongs to the technical field of magnetic materials, and in particular relates to a monodisperse melamine resin magnetic microsphere and a preparation method thereof. Background technique [0002] Monodisperse melamine resin (MF) microspheres have a high service temperature (about 200°C), and at the same time, their surface contains active groups such as amino groups and hydroxyl groups, which are easy to functionalize and have good application potential; from the principle point of view, the principle of MF polymerization is Polycondensation, the polymerization method generally adopts the dispersion polymerization method, which has the characteristics of short cycle (about 40 minutes), simple process, and good monodispersity of microspheres. [0003] Monodisperse melamine resin magnetic microspheres have both the magnetic responsiveness and magnetic effect of magnetic inorganic substances and many surface functions such as functional gr...

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 Patents(China)
IPC IPC(8): B01J13/02
CPCB01J13/02
Inventor 李友伟黄玉安张越飞苏童杨振誉倪宏远王顺张金财凌立巍
Owner NANJING INST OF TECH
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