Method for preparing surface porous silicon dioxide microspheres based on long-chain alkyl ionic liquid as pore-foaming agent
An ionic liquid and long-chain alkyl technology, which is applied in the field of preparation of surface porous silica microspheres, can solve the problems of limited pore structure regulation, small pore size, and limitations
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0028] Add 0.435 g of 1-octadecyl-3-methylimidazolium bromide porogen and 0.5 g of non-porous silica (particle size 1.8 μm) as the inner core into 30 ml of deionized water, and ultrasonically disperse to obtain an aqueous phase solution ; Subsequently, 0.5 ml of tetraethyl orthosilicate is used as a silicon source and 2 ml of acetonitrile is added as a cosolvent into 30 ml of n-hexane solution to disperse evenly to obtain an oil phase solution; React at a reaction temperature of 70 °C and a rotational speed of 300 r / min for 17 h. The obtained product was washed with deionized water and an organic solvent repeatedly to remove impurities. The obtained solid was dried and placed in a muffle furnace, and calcined at 500 °C for 3 h to obtain Crude product; the crude product is washed with water and absolute ethanol to remove impurities, and the surface porous silica microspheres with regular shape, uniform size and obvious core-shell structure are obtained (see figure 1 , figure ...
Embodiment 2
[0030] Add 0.446 g of 1-octadecyl-3-vinylimidazolium bromide porogen and 0.5 g of non-porous silica (particle size 1.8 μm) as the inner core into 30 ml of deionized water, and ultrasonically disperse to obtain an aqueous phase solution ; Subsequently, 0.5 ml of tetraethyl orthosilicate is used as a silicon source and 2 ml of acetonitrile is added as a cosolvent into 30 ml of n-hexane solution to disperse evenly to obtain an oil phase solution; React at a reaction temperature of 70 °C and a rotational speed of 300 r / min for 17 h. The obtained product was washed with deionized water and organic solvent repeatedly to remove impurities. The obtained solid was dried and placed in a muffle furnace, and calcined at 500 °C for 3 h. A crude product is obtained; the crude product is washed with water and absolute ethanol to remove impurities, and the surface porous silica microspheres with regular shape, uniform size and obvious core-shell structure are obtained. The characterization re...
Embodiment 3
[0032]Add 0.435 g of 1-octadecyl-3-methylimidazolium bromide porogen and 0.5 g of non-porous silica (particle size 1.8 μm) as the inner core into 30 ml of deionized water, and ultrasonically disperse to obtain an aqueous phase solution ; Then add 0.5 ml tetraethyl orthosilicate as a silicon source and 0.46 ml isopropanol as a cosolvent into 30 ml n-hexane solution to disperse evenly to obtain an oil phase solution; then mix the obtained water phase solution and oil phase solution , reacted at a reaction temperature of 70 °C and a rotational speed of 300 r / min for 17 h, washed the obtained product with deionized water and organic solvent repeatedly to remove impurities, dried the obtained solid, placed it in a muffle furnace, and calcined at 500 °C After 3 hours, the crude product was obtained; the crude product was washed with water and absolute ethanol to remove impurities, and superficially porous silica microspheres with regular shape, uniform size and obvious core-shell str...
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle diameter | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More