Method for preparing silicon oxide-based aerogel ball with controllable particle size through continuous liquid phase polymerization
A technology based on liquid phase polymerization and wet gel balls, which is applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problems of cumbersome ball drop method, difficult quantitative production, time-consuming and labor-consuming, etc. Simple, easy to use, good effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
example 1
[0028] At room temperature, dissolve 0.1 mol of methyltrimethoxysilane, 0.1 mol of o-phthalaldehyde, and 0.2 mol of silane coupling agent KH550 in 16 mol of methanol, mix well and add 8 mol of acetic acid aqueous solution with a concentration of 1 mmol / L Stirring was continued, and ultrasonication was performed at 50° C. for 60 minutes to carry out a prepolymerization reaction to obtain a silicon oxide-based reaction solution with a pH of 5. At 50°C, 10ml of urea solution was dispersed in 120ml of water-based silicone oil, and mixed evenly to obtain a coagulation bath with a pH of 8. At 70°C, under the condition of rotating speed of 10000rpm, the reaction solution was mixed with the coagulation bath, kept at 70°C for 30 minutes, separated and filtered, and washed with deionized water at 60°C for 8 minutes to obtain silica-based wet gel balls. After methanol replacement and spray drying, silicon oxide-based airgel spheres with controllable particle size are obtained. The avera...
example 2
[0033] At room temperature, dissolve 0.2mol of methyltriethoxysilane, 0.4mol of isophthalaldehyde, and 0.2mol of silane coupling agent KH560 in 16mol of ethanol, mix well and add 8mol of oxalic acid with a concentration of 2mmol / L The aqueous solution continued to stir, and was ultrasonicated at 60° C. for 50 minutes to carry out a prepolymerization reaction to obtain a silicon oxide-based reaction solution with a pH of 4. At 25°C, disperse 10ml of ammonia water in 100ml of methyl silicone oil, and mix evenly to obtain a coagulation bath with a pH of 10. At 80°C, the reaction solution was mixed with a coagulation bath at a rotational speed of 100 rpm, kept at 80°C for 20 minutes, separated and filtered, washed with deionized water at 70°C for 6 minutes to obtain silica-based wet gel balls. After replacing with n-hexane and drying under normal pressure, the silica-based airgel spheres with controllable particle size are obtained. The average particle size of silica-based airge...
example 3
[0035] At room temperature, dissolve 1 mol of trimethylmethoxysilane, 5 mol of terephthalaldehyde, and 5 mol of silane coupling agent KH570 in 20 mol of isopropanol, mix well and add 10 mol of carbonic acid aqueous solution with a concentration of 5 mmol / L Stirring was continued, followed by water heating at 100° C. for 10 minutes to carry out prepolymerization to obtain a silicon oxide-based reaction solution with a pH of 6. At 90°C, disperse 30ml of NaOH solution in 180ml of corn oil, and mix evenly to obtain a coagulation bath with a pH of 12. At 80°C, under the condition of rotating speed of 1000rpm, the reaction solution was mixed with the coagulation bath, kept at 80°C for 10 minutes, separated and filtered, and washed with deionized water at 70°C for 6 minutes to obtain silica-based wet gel balls. After ethanol replacement and vacuum drying, silica-based airgel spheres with controllable particle size were obtained. The average particle size of silica-based airgel balls...
PUM
| Property | Measurement | Unit |
|---|---|---|
| The average particle size | aaaaa | aaaaa |
| Aperture | aaaaa | aaaaa |
| Bulk density | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More