A kind of preparation method of monodisperse ordered hydrophobic silica nanoparticles
A technology of hydrophobic silica and nanoparticles, applied in the direction of silica, silica, etc., can solve the problems of poor dispersion and poor order of surface pores
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Embodiment 1
[0022] Weigh 1 g CTAB and pour it into a 100 ml beaker, add 0.2 ml MTES, 7.6 ml deionized water and 18.4 ml ethanol. Add a rotor and stir at 30 °C for 6 h. Finally, the mixed solution was poured into a 250 ml three-necked flask, and 74 ml of benzene was added, and the temperature was raised to 69 ° C for azeotropic distillation for 1 h. Finally, adjust the temperature to 105 ° C, and steam the residual moisture. The reaction product was dried at 60 ° C, and then the mixed washing solution (V 异丙醇 :V 水 =1:1), put into the centrifuge and centrifuge at 9000 r / min. Take the precipitate under the centrifuge tube and dry it at 60 °C to obtain hydrophobic silica. The monodisperse hydrophobic silica has a particle size of 30 nm and a pore size of 1.12 nm. Electron microscope images of monodisperse hydrophobic silica prepared by azeotropic distillation as figure 1 shown. The contact angle test image of the obtained hydrophobic silica is as follows figure 2 shown.
Embodiment 2
[0024] Weigh 1 g of CTAB and pour it into a 100 ml beaker, add 1 ml of MTES, 7.6 ml of deionized water and 18.4 ml of ethanol, put it into the rotor, and stir at 30 °C for 6 h. Finally, the mixed solution was poured into a 250 ml three-necked flask, and 74 ml of benzene was added, and the temperature was raised to 69 ° C for azeotropic distillation for 1 h. Finally, adjust the temperature to 105 ° C, and steam the residual moisture. The reaction product was dried at 60 ° C, and then the mixed washing solution (V 异丙醇 :V 水 =1:1), put into the centrifuge and centrifuge at 9000 r / min. The precipitate under the centrifuge tube was dried at 60 °C to obtain monodisperse hydrophobic silica. The monodisperse hydrophobic silica has a particle size of 125 nm and a pore size of 3.1 nm. Electron microscope images of monodisperse hydrophobic silica prepared by azeotropic distillation as image 3 shown.
Embodiment 3
[0026] Weigh 1 g of CTAB and pour it into a 100 ml beaker, add 2 ml of MTMS, 7.6 ml of deionized water and 18.4 ml of ethanol, put it into the rotor, and stir at 30 °C for 6 h. Finally, the mixed solution was poured into a 250 ml three-necked flask, and 74 ml of benzene was added, and the temperature was raised to 69 ° C for azeotropic distillation for 1 h. Finally, adjust the temperature to 105 ° C, and steam the residual moisture. The reaction product was dried at 60 ° C, and then the mixed washing solution (V 异丙醇 :V 水 =1:1), put into the centrifuge and centrifuge at 9000 r / min. The precipitate under the centrifuge tube was dried at 60 °C to obtain monodisperse hydrophobic silica.
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