Mesoporous silica drug-loaded nanoparticle and preparation method and application thereof
A technology of mesoporous silica and drug-loaded nanometers is applied in the field of medicine to achieve good photothermal treatment effect, good anti-tumor effect, and feasible and reliable operation.
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Embodiment 1
[0051] A preparation method of mesoporous silica drug-loaded nanoparticles, specifically implemented according to the following steps:
[0052] Step 1, Synthesis of MSN
[0053] Weigh 250 mg of CTAB and dissolve it in 120 mL of deionized aqueous solution, then add 875 μL of 2M NaOH, and stir vigorously at 60°C for 30 min. After CTAB is completely dissolved, slowly add 1.25mL TEOS and continue to stir for 2h. After the reaction, the product was left to cool down to room temperature, centrifuged at 10000rpm for 5min, washed three times with deionized water and ethanol respectively, and finally extracted and refluxed with an ethanol solution containing ammonium nitrate (4g / L) for 24h to remove the template agent. After obtaining the sample, Washed three times with deionized water and absolute ethanol respectively, dried in a vacuum oven at 60°C for 12 hours, and marked as MSN.
[0054] Step 2, MSN-NH 2 Synthesis
[0055] Weigh 200mg of MSN powder into a 500mL round bottom fla...
Embodiment 2
[0063] A preparation method of mesoporous silica drug-loaded nanoparticles, specifically implemented according to the following steps:
[0064] Step 1, Synthesis of MSN
[0065]Weigh 300 mg of CTAB and dissolve it in 150 mL of deionized aqueous solution, then add 1000 μL of 2M NaOH, and stir vigorously at 70°C for 40 min. After CTAB was completely dissolved, 1.5mL TEOS was added slowly, and stirring was continued for 3h. After the reaction, the product was cooled to room temperature, centrifuged at 12000 rpm for 8 min, and washed four times with deionized water and ethanol respectively. Finally, the ethanol solution containing ammonium nitrate (5g / L) was extracted and refluxed for 36h to remove the template agent. After the sample was obtained, it was washed 4 times with deionized water and absolute ethanol, and dried in a vacuum oven at 70°C for 12h, marked as MSN .
[0066] Step 2, MSN-NH 2 Synthesis
[0067] Weigh 300mg of MSN powder into a 1000mL round bottom flask, a...
Embodiment 3
[0075] A preparation method of mesoporous silica drug-loaded nanoparticles, specifically implemented according to the following steps:
[0076] Step 1, Synthesis of MSN
[0077] Weigh 400 mg of CTAB and dissolve it in 200 mL of deionized aqueous solution, then add 1200 μL of 2M NaOH, and stir vigorously at 80 °C for 45 min. After CTAB is completely dissolved, slowly add 2.0mL TEOS and continue to stir for 3h. After the reaction, the product was cooled to room temperature, centrifuged at 15,000 rpm for 10 min, and washed five times with deionized water and ethanol respectively. Finally, the ethanol solution containing ammonium nitrate (6g / L) was extracted and refluxed for 48 hours to remove the template agent. After the sample was obtained, it was washed 5 times with deionized water and absolute ethanol, and dried in a vacuum oven at 80°C for 24 hours, marked as MSN .
[0078] Step 2, MSN-NH 2 Synthesis
[0079] Weigh 250mg of MSN powder into a 500mL round bottom flask, ad...
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