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

Magnetic particle-based switching emulsion and preparation method thereof

A technology of magnetic particles and emulsions, applied in magnetic objects, magnetic materials, chemical instruments and methods, etc., can solve problems such as deficiencies, and achieve the effects of short emulsification time, low dosage and good emulsion stability

Active Publication Date: 2020-07-07
INST OF CHEM CHINESE ACAD OF SCI
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on magnetic particles is limited to the fact that it can be used as an emulsion stabilizer to prepare Pickering emulsion (magnetic emulsion), or make the emulsion break through magnetic response under the action of an external magnetic field, but there are still some studies on the simultaneous realization of the above two functions. lacking

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
  • Magnetic particle-based switching emulsion and preparation method thereof
  • Magnetic particle-based switching emulsion and preparation method thereof
  • Magnetic particle-based switching emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1, the superparamagnetic iron ferric oxide particle Fe of dendrimer modification 3 o 4 Preparation of @PAMAM

[0051] Fe 3 o 4 The synthesis route of @PAMAM magnetic particles is as follows figure 1 shown.

[0052] The specific method is as follows: in nitrogen atmosphere, 0.01mol Fe 3 o 4Disperse nanoparticles in 100ml ethanol, use 200ml toluene as solvent, add 0.0232mol 3-aminopropyltrimethoxysilane reagent, react at 110°C for 8h, get black particles, then slowly add 0.05mol methyl acrylate with anhydrous methanol as solvent Esters were reacted at 35°C for 40h to obtain magnetic particles modified with 0.5GPAMAM dendrimers. Finally, 200ml of anhydrous methanol was used as a solvent, and 0.1mol ethylenediamine was slowly added, and reacted at 45°C for 50h to obtain 1G Fe 3 o 4 @PAMAM magnetic particles.

[0053] Superparamagnetic Fe3O4 particles modified by prepared dendrimers Fe 3 o 4 @PAMAM for characterization. Such as figure 2 As shown, Fe ...

Embodiment 2

[0055] Embodiment 2, the preparation of the emulsion based on magnetic particles

[0056] Will be dispersed with the Fe that different concentration embodiment 1 prepares 3 o 4 Dodecane (oil phase) of @PAMAM magnetic particles: water is added to the container at a volume ratio of 2:1, and emulsified on a vortex emulsifier at a speed of 2500r / s for 30s to obtain stable Fe 3 o 4 @PAMAM is an emulsion of emulsifiers.

[0057] Such as Figure 4 As shown, with the emulsifier Fe 3 o 4 With an increase in the content of @PAMAM, the volume V of the stable emulsion formed e increase, and this state can be maintained for a long time, and with the emulsifier Fe 3 o 4 As the content of @PAMAM increases, the volume of the stable emulsion accounts for the total system volume V total ratio (V e / V total ) were 80%, 90% and 100% respectively. After standing for a period of time, the emulsion did not change much. Until standing for 25 days, a small amount of demulsification occurred...

Embodiment 3

[0058] Embodiment 3, demulsification of emulsion based on magnetic particles

[0059] With the different concentration Fe that just prepared in embodiment 2 3 o 4 @PAMAM magnetic particle emulsion is placed on a large magnet (0.4T) and stirred at a low speed (stirring speed is 30r / min) for magnetic response demulsification. The demulsification effect is as follows Figure 5 shown. It can be seen that different concentrations of Fe 3 o 4 @PAMAM Magnetic Particle Emulsion has good demulsification effects, achieving complete separation of oil and water, and an obvious oil-water interface can be observed in the liquid. With Fe 3 o 4 With the increase of the content of @PAMAM magnetic particles, the longer it takes for the emulsion to achieve complete demulsification, the more difficult the demulsification is. The demulsification time is 1min20s, 8min, and 17min20s respectively.

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses an emulsion based on magnetic particles and a preparation method thereof. The emulsion uses magnetic ferric oxide particles modified by dendrimers as an emulsifier to emulsify oil and water to prepare a magnetic particle emulsion; and by introducing an external magnetic field, the emulsion can be rapidly demulsified under magnetic response, as well as cyclic emulsification and demulsification. milk. The method is simple to operate, uses less magnetic particles, is low in cost, can be reused, and is environmentally friendly.

Description

technical field [0001] The invention belongs to the field of surfactants, in particular to a switch-type emulsion based on magnetic particles and a preparation method thereof. Background technique [0002] A number of environmentally sensitive groups are introduced into the surfactant molecule. When environmental factors change, the internal molecular structure of the surfactant will change under the stimulation of the external environment (temperature, inorganic salt, magnetic field, pH value, carbon dioxide, etc.). Furthermore, by affecting its properties such as polarity and electrostatic force, the surface / interface properties of the surfactant will change significantly, thereby realizing the controllable activity of the oil-water interface. [0003] Magnetically responsive surfactants are a new class of surfactants, which are nanoscale particles with superparamagnetic properties. Superparamagnetism refers to a ferromagnetic substance with a single-domain structure when...

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): H01F1/00H01F41/00C01G49/08B01F17/36C08G83/00C08G73/02C09K23/36
CPCH01F1/0018H01F41/00C01G49/08C08G83/001C08G83/003C08G73/028C01P2004/01C01P2006/42C09K23/017
Inventor 杨惠王淑娟陈睿刘芳慧陈婷樊明红张威张珊美玉陈海波王金本
Owner INST OF CHEM CHINESE ACAD OF SCI
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