Preparation for magnetic fluid and chitosan magnetic micro-sphere
A chitosan microsphere and magnetic fluid technology, applied in magnetic liquid and other directions, can solve the problems of magnetic chitosan microspheres that are not easy to recover, easy to aggregate, not easy to aggregate, etc., so as to overcome the difficult recovery and easy aggregation, and improve the magnetic strength. , the effect of reducing the coercivity
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0012] The invention provides a method for preparing a magnetic fluid, which comprises adding an excessive amount of alkaline aqueous solution to an aqueous solution containing ferrous ions and ferric ions; then carrying out a precipitation reaction under a protective gas atmosphere to separate the precipitation reaction product get Fe 3 o 4 ; will get Fe 3 o 4 and surfactants are added to the carrier liquid for heating, and then the heated product is separated to obtain a magnetic fluid, wherein, in the aqueous solution containing ferrous ions and ferric ions, the moles of ferrous ions and ferric ions The ratio is 1.4-1.8:1.
[0013] The inventor of the present invention has carried out meticulous research to existing ferrofluid preparation method, finds that when carrying out precipitation reaction, the molar ratio of ferrous ion and ferric ion directly affects the property of the ferrofluid obtained; And the present invention The inventor unexpectedly found that when th...
Embodiment 1
[0030] This embodiment is used to illustrate the preparation method of the magnetic fluid provided by the present invention.
[0031] (1) 0.36 moles of ferric chloride and 0.2 moles of ferric chloride are dissolved in 1000 milliliters of water to obtain an aqueous solution; then adding 320 milliliters of aqueous sodium hydroxide solution to the aqueous solution is 3.2 moles / liter of sodium hydroxide solution to obtain Mixed solution, in the mixed solution, Fe 3+ with OH - The molar ratio of the mixture was 1:5; the mixture was then transferred to a 2-liter four-neck flask equipped with a stirrer (Beijing Qili Dasen Instrument Technology Co., Ltd., RS-4A), a thermometer and a condenser tube, and the temperature was raised in a water bath under a nitrogen atmosphere. Carry out precipitation reaction, the temperature of reaction is 60 ℃, the time of reaction is 80 minutes, and stirring speed is 500 rev / min; Separate the obtained Fe with magnet (magnetic strength is 100emu / g) aft...
Embodiment 2
[0036] This embodiment is used to illustrate the preparation method of the magnetic fluid provided by the present invention.
[0037] (1) 0.32 moles of ferric chloride and 0.2 moles of ferric chloride are dissolved in 800 milliliters of water to obtain an aqueous solution; then adding 500 milliliters of concentration in the aqueous solution is an aqueous potassium hydroxide solution of 3.2 moles / liter to obtain Mixed solution, in the mixed solution, Fe 3+ with OH - The molar ratio of the mixture is 1:8; the mixed solution is then transferred to a 2-liter four-neck flask equipped with a stirrer (Beijing Qili Dasen Instrument Technology Co., Ltd., RS-4A), a thermometer and a condenser tube. Carry out precipitation reaction, the temperature of reaction is 80 ℃, the time of reaction is 50 minutes, and stirring speed is 500 revolutions / minute; Separate the obtained Fe with magnet (magnetic strength is 100emu / g) afterwards 3 o 4 , and washed 3 times with 100 ml deionized water re...
PUM
Property | Measurement | Unit |
---|---|---|
Magnetic strength | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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