Preparation method and applications of magnetic nanocomposite particle
A composite particle, magnetic nanotechnology, applied in biochemical equipment and methods, chemical instruments and methods, alkali metal compounds, etc., can solve the problems of many steps, short production cycle, complex separation process, etc., to improve extraction efficiency, specificity, etc. The effect of good adsorption and simple operation
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[0037] Example 1
[0038] 0.01M ferrous sulfate heptahydrate and 0.02M ferric chloride hexahydrate are dissolved in water-ethanol mixed solution (V / V=10:1), add polyethylene glycol 6000, under ultrasonic (F=28KHz) dispersion state Nitrogen gas for 30 minutes; raise the temperature to 40°C, then slowly add ammonia water to the system, adjust the pH value of the system to about 10, and obtain a black solution containing magnetic particles, after reacting for 30 minutes, quickly add 2% sodium chondroitin sulfate solution , heated up to 70°C for 1 hour, terminated the reaction, left to cool to obtain the reaction liquid; separated the magnetic particles under the action of an external magnetic field, washed several times with deionized water until neutral, and performed freeze-drying treatment to obtain Sodium chondroitin sulfate modified iron ferric oxide magnetic nanocomposite particle powder.
[0039] Egg yolk and egg white were separated, and then fresh egg white was dilute...
Example Embodiment
[0041] Example 2
[0042] Dissolve 0.2M ferrous chloride tetrahydrate and 0.1M ferric chloride hexahydrate in water-ethanol mixed solution (V / V=1:1), add sodium dodecylbenzenesulfonate, and ) in a dispersed state and pass nitrogen gas for 30 minutes; raise the temperature to 60°C, then slowly add sodium hydroxide solution to the system, adjust the pH value of the system to about 11, and obtain a black solution containing magnetic particles, add it quickly after reacting for 30 minutes 2% citric acid solution, heated up to 80°C for 1 hour, terminated the reaction, let it stand for cooling, and obtained the reaction solution; separated the magnetic particles under the action of an external magnetic field, washed several times with deionized water until neutral, and lyophilized After treatment, the citric acid-modified ferroferric oxide magnetic nanocomposite particle powder can be obtained.
[0043] Egg yolk and egg white were separated, and then fresh egg white was diluted w...
Example Embodiment
[0045] Example 3
[0046] Dissolve 0.2M ferrous sulfate heptahydrate and 0.3M ferric chloride hexahydrate in water-ethanol mixed solution (V / V=5:1), add polyethylene glycol 6000, under ultrasonic (F=28KHz) dispersion state Blow nitrogen for 30 minutes; raise the temperature to 70°C, then slowly add sodium hydroxide solution to the system, adjust the pH value of the system to about 11, and obtain a black solution containing magnetic particles, and quickly add 1% carboxymethyl after reacting for 30 minutes Chitosan-based solution, heated up to 90°C for 6 hours, terminated the reaction, left to cool to obtain a reaction liquid; separated magnetic particles under the action of an external magnetic field, and washed several times with deionized water until neutral, and then freeze-dried After treatment, carboxymethyl chitosan-modified ferric iron tetroxide magnetic nanocomposite particle powder can be obtained.
[0047] Egg yolk and egg white were separated, and then fresh egg w...
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