Preparation method of hydrophobic magnetic nanoparticle dispersible into water phase
A magnetic nanoparticle and nanoparticle technology, applied in chemical instruments and methods, other chemical processes, alkali metal compounds, etc., can solve the problems of unfavorable trace substance adsorption, reduce the aggregation of organic molecules, and achieve specificity and easy separation , excellent adsorption performance, and the effect of improving surface activity
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Embodiment 1
[0037] The preparation steps are as follows:
[0038] 1) Magnetic Fe 3 o 4 Preparation of nanoparticles: 0.8g FeCl 3 ·6H 2 O, 3.0g FeCl 2 4H 2 0. Add 0.5 mL of concentrated hydrochloric acid to 20 mL of water and mix; under vigorous stirring, add 200 mL of 1.5 M NaOH solution to the mixture; heat the obtained precipitate at 70°C for 60 min and wash it with distilled water 4 times;
[0039] 2) Fe 3 o 4 -SiO 2 Preparation of magnetic nanoparticles: After mixing 15mL ethanol and 5mL tetraethyl orthosilicate solution, add a stirred solution containing 4g Fe 3 o 4 30mL of ethanol solution, then the mixture was ultrasonicated at a temperature of 40°C for 1h; 6.0mL of triethylamine was added dropwise to the mixture and stirred for 15min; Separated by magnetic substances, washed with distilled water for 3 times, and dried at 80°C for 16 hours;
[0040] 3) Preparation of epoxidized vegetable oil: 30 mL of sunflower oil, 15 mL of hydrogen peroxide, 4 mL of formic acid, and 0....
Embodiment 2
[0043] The preparation steps are as follows:
[0044] 1) Magnetic Fe 3 o 4 Preparation of nanoparticles: 0.8 g FeCl 3 ·6H 2 O, 4.0g FeCl 2 4H 2 0. Add 0.6 mL of concentrated hydrochloric acid to 25 mL of water and mix; under vigorous stirring, add 230 mL of 1.5M NaOH solution to the mixture; heat the obtained precipitate at 60°C for 70 min and wash it with distilled water for 3 times;
[0045] 2) Fe 3 o 4 -SiO 2 Preparation of magnetic nanoparticles: After mixing 19mL ethanol and 7mL tetraethyl orthosilicate solution, add the stirred 3 o 4 30mL ethanol solution, then the mixture was sonicated at a temperature of 50°C for 1.2h; 6.0mL of ammonia water was added dropwise to the mixture and stirred for 12min; Separation of magnetic substances, washing with distilled water twice, and drying at 80°C for 18 hours;
[0046] 3) Preparation of epoxidized vegetable oil: 100 mL of rapeseed oil, 60 mL of hydrogen peroxide, 20 mL of acetic acid, and 1 mL of concentrated sulfuric ...
Embodiment 3
[0050] 1) Magnetic Fe 3 o 4 Preparation of nanoparticles: 0.9g FeCl 3 ·6H 2 O. 5.0g FeCl 2 4H 2 O. Add 1.0 mL of concentrated hydrochloric acid to 28 mL of water and mix; under vigorous stirring, add 260 mL of 1.5M NaOH solution to the mixture; heat the obtained precipitate at 80°C for 100 min and wash it with distilled water for 3 times;
[0051] 2) Fe 3 o 4 -SiO 2 Preparation of magnetic nanoparticles: After mixing 22mL ethanol and 8mL tetraethyl orthosilicate solution, add the stirred 3 o 4 40mL of ethanol solution, then the mixture was ultrasonicated at a temperature of 60°C for 2h; 8.0mL of triethylamine was added dropwise to the mixture and stirred for 20min; Separated by magnetic substances, washed with distilled water for 3 times, and dried at a temperature of 90°C for 15 hours;
[0052] 3) Preparation of epoxidized vegetable oil: 80 mL of olive oil, 60 mL of hydrogen peroxide, 10 mL of acetic acid, and 1.3 mL of hydrochloric acid were placed in a round-botto...
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