Perfluor polyether oil-based magnetic liquid
A technology of perfluoropolyether oil and magnetic liquid, which is applied in the direction of magnetic liquid, organic material/organic magnetic material, etc., can solve the problems of inapplicability, limited application field, and inability to withstand radiation.
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Embodiment 1
[0044] (1) Bare Fe 3 o 4 Preparation of Magnetic Nanoparticles
[0045] Weigh 5.40g FeCl 3 Dissolve in 400ml of deionized water, prepare a 0.05mol / L solution at room temperature for use, and control the temperature of the water bath at 32°C. Pour the configured Fe into the three-neck bottle 3+ Solution, the stirring speed is 300r / min, when the temperature is close to the preparation reaction temperature of 32°C, add 1.98g FeCl 2 For powder, reduce the stirring speed to 100r / min and continue stirring to dissolve evenly. Monitor the internal temperature of the iron-salt mixture at any time. When the temperature reaches 31-32°C, slowly pour in 20ml of 25% concentrated ammonia water, and the reaction solution will immediately turn black. Adjust the rotating speed to be 200r / min, and the reaction time is 30min to prepare bare Fe 3 o 4 magnetic nanoparticles.
[0046] (2) Effect of perfluoropolyether carboxylic acid surfactants on bare Fe 3 o 4 Coating Modification of Magne...
Embodiment 2
[0053] (1) Bare Fe 3 o 4 Preparation of Magnetic Nanoparticles
[0054] Weigh 54.0g FeCl 3 Dissolve in 400ml of deionized water, prepare a 0.5mol / L solution at room temperature for use, and control the temperature of the water bath at 42°C. Pour the configured Fe into the three-neck bottle 3+ Solution, the stirring speed is 300r / min, when the temperature is close to the preparation reaction temperature of 42°C, add 27.80g FeSO 4 For powder, reduce the stirring speed to 100r / min and continue to stir and dissolve evenly. Monitor the internal temperature of the iron-salt mixture at any time. When the temperature reaches 41-42°C, slowly pour in 120ml of 25% concentrated ammonia water, and the reaction solution will immediately turn black. Adjust the rotating speed to be 400r / min, and the reaction time is 15min to prepare bare Fe 3 o 4 magnetic nanoparticles.
[0055] (2) Effect of perfluoropolyether carboxylic acid surfactants on bare Fe 3 o 4 Coating Modification of Magn...
Embodiment 3
[0062] (1) Bare Fe 3 o 4 Preparation of Magnetic Nanoparticles
[0063] Weigh 54.0g FeCl 3 Dissolve in 400ml of deionized water, prepare a 0.5mol / L solution at room temperature for use, and control the temperature of the water bath at 52°C. Pour the prepared F into the three-neck bottle e 3+ Solution, the stirring speed is 300r / min, when the temperature is close to the preparation reaction temperature of 52°C, add 27.80g FeSO 4 For powder, reduce the stirring speed to 100r / min and continue to stir and dissolve evenly. Monitor the internal temperature of the iron-salt mixture at any time. When the temperature reaches 51-52°C, slowly pour in 150ml of 25% concentrated ammonia water, and the reaction solution will immediately turn black. Adjust the rotating speed to 400r / min, and the reaction time is 10min to prepare bare Fe 3 o 4 magnetic nanoparticles.
[0064] (2) Effect of perfluoropolyether carboxylic acid surfactants on bare Fe 3 o 4 Coating Modification of Magneti...
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