Silica-based janus particles, methods of making and using the same
By controlling the ratio of silicate ester to modifier, silica-based Janus particles are prepared at low temperatures, solving the problem of cumbersome high-temperature steps in existing technologies. This achieves surface modification of particles and can be applied to the fields of stabilized emulsions and catalysts.
CN111392736BActive Publication Date: 2026-07-24GUANGDONG OCEAN UNIVERSITY
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Patent Information
- Application Number
- CN202010231693.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-03-27
- Publication Date
- 2026-07-24
- Estimated Expiration
- 2040-03-27
AI Technical Summary
Technical Problem
Existing methods for preparing silica-based Janus particles involve high reaction temperatures, cumbersome steps, and the particles do not possess regioamphiphilicity.
Method used
By controlling the ratio of silicate ester to modifier, the reaction is carried out in a weakly alkaline solution, thereby regulating the reaction environment and generating silica-based Janus particles. The reaction temperature is low and the number of steps is small.
Benefits of technology
Uniform spherical silica-based Janus particles were prepared, with one side of the surface being smooth and hydrophilic, and the other side being rough and oleophilic. They were used to stabilize emulsions and support catalysts, exhibiting better stability and adaptability.
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Abstract
The application discloses a kind of silica-based Janus particles and its preparation method and application, its preparation method includes the following steps: the molar ratio of 1:0.007~0.014 of silicate and alkoxysilane is dissolved in solvent, after stirring, a certain amount of weak alkaline solution is added, after 20~30 ℃ reaction 6~12 h, after centrifugation, dry and obtain silica-based Janus particles.The method needs lower temperature for reaction, mild condition, reaction step is less, and the Janus particles prepared are uniform spherical shape, the surface of the ball has obvious different morphology, one side is smooth and the other side is rough, the smooth surface has hydrophilicity and the rough surface has lipophilicity, which can be applied to stable emulsion, catalyst loading, drug controlled release and other fields.
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