w/o/w multiphase emulsion and preparation of hierarchical porous siO using it as a template 2 microsphere method
A technology of multiphase emulsion and hydrochloric acid aqueous solution, which is applied in the field of preparing multi-level porous SiO2 microspheres, to achieve the effects of simple preparation method, uniform distribution of emulsion droplets, and easy structure adjustment
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Embodiment 1
[0037] Dissolve 0.15g of small molecule stabilizer in 1mL of vinyltriethoxysilane, then add 4mL of hydrochloric acid aqueous solution with a pH value of 2, and mechanically stir at room temperature for 2 minutes at a speed of 11400 rpm to obtain W / O / W multiphase emulsion (see figure 1 ), it can be seen from the figure that the obtained multiphase emulsion droplet size is uniform.
[0038] In the above preparation process, the inventor added Nile Red to vinyltriethoxysilane for dyeing, and performed fluorescence microscope characterization of the obtained multiphase emulsion. The results are shown in figure 2 , the result proves that the type of emulsion is W / O / W type multiphase emulsion.
Embodiment 2
[0040] Dissolve 0.15g of small molecule stabilizer in 1mL of vinyltriethoxysilane, then add 4mL of hydrochloric acid aqueous solution with a pH value of 4, and mechanically stir at room temperature for 2 minutes at a speed of 11400 rpm to obtain W / O / W multiphase emulsion (see image 3 ), it can be seen from the figure that the droplet distribution in the obtained multiphase emulsion is uniform.
Embodiment 3
[0042] Dissolve 0.15g of small molecule stabilizer in 1mL of vinyltriethoxysilane, then add 4mL of hydrochloric acid aqueous solution with a pH value of 5, and mechanically stir at room temperature for 2 minutes at a speed of 11400 rpm to obtain W / O / W multiphase emulsion (see Figure 4 ), it can be seen from the figure that the droplet size in the obtained multiphase emulsion is uniform.
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