Core-shell type magnetic nano-composite particle based on Fe3O4 and houghite and preparation method thereof
A composite particle, magnetic nanotechnology, applied in the direction of inorganic material magnetism, non-active ingredients medical preparations, medical preparations containing active ingredients, etc., can solve the influence of uneven particle size, incomplete core-shell structure, difficult to control Particle size and other issues, to achieve uniform distribution, good drug release effect, strong magnetic effect
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Embodiment 1
[0027] (1) Fe 3 o 4 preparation and surface modification
[0028] Weigh FeCl 3 ·6H 2 O and sodium acetate, added to 400ml ethylene glycol and stirred at room temperature until dissolved to form a uniformly dispersed yellow solution, in which FeCl 3 ·6H 2 The molar concentration of O is 0.0125mol / L, sodium acetate and FeCl 3 ·6H 2 The molar concentration ratio of O is 4.24. The resulting solution was charged into a 500 ml autoclave, followed by crystallization at 200° C. for 8 hours. The autoclave was taken out and naturally cooled to room temperature, and the obtained Fe 3 o 4 The suspension was washed three times each with ethanol and deionized water, and the Fe and Fe boron permanent magnets were used to separate the Fe 3 o 4 solid. After washing, the obtained Fe 3 o 4 The solid was redispersed in ethanol and stored in a ground flask until use. The Fe obtained by the above steps 3 o 4 The particle size is 100nm, and the specific saturation magnetization σ s...
Embodiment 2
[0036] (1) Fe 3 o 4 preparation and surface modification
[0037] Weigh FeCl 3 ·6H 2 O and sodium acetate, added to 400ml ethylene glycol and stirred at room temperature until dissolved to form a uniformly dispersed yellow solution, in which FeCl 3 ·6H 2 The molar concentration of O is 0.025mol / L, sodium acetate and FeCl 3 ·6H 2 The molar concentration ratio of O is 4.24. The resulting solution was charged into a 500 ml autoclave, followed by crystallization at 200° C. for 8 hours. The autoclave was taken out and naturally cooled to room temperature, and the obtained Fe 3 o 4 The suspension was washed three times each with ethanol and deionized water, and the Fe and Fe boron permanent magnets were used to separate the Fe 3 o 4 solid. After washing, the obtained Fe 3 o 4 The solid was redispersed in ethanol and stored in a ground flask until use. The Fe obtained by the above steps 3 o 4 The particle size is 150nm, and the specific saturation magnetization σ s ...
Embodiment 3
[0045] (1) Fe 3 o 4 preparation and surface modification
[0046] Weigh FeCl 3 ·6H 2 O and sodium acetate, added to 400ml ethylene glycol and stirred at room temperature until dissolved to form a uniformly dispersed yellow solution, in which FeCl 3 ·6H 2 The molar concentration of O is 0.1mol / L, sodium acetate and FeCl 3 ·6H 2 The molar concentration ratio of O is 4.24. The resulting solution was charged into a 500 ml autoclave, followed by crystallization at 200° C. for 8 hours. The autoclave was taken out and naturally cooled to room temperature, and the obtained Fe 3 o 4 The suspension was washed three times each with ethanol and deionized water, and the Fe and Fe boron permanent magnets were used to separate the Fe 3 o 4 solid. After washing, the obtained Fe 3 o 4 The solid was redispersed in ethanol and stored in a ground flask until use. The Fe obtained by the above steps 3 o 4 The particle size is 260nm, and the specific saturation magnetization σ s 85...
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