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US 11,142,909 B2Granted
Microencapsulation of materials using cenospheres
AssigneeThe Board of Trustees of The University of Alabama
InventorJialai Wang
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Abstract
Disclosed are methods for incorporating core materials such as phase change materials or admixtures into building materials like concrete. The methods use cenospheres, which are then etched and loaded with the core material. The composition can also be coated with a thin film. Compositions containing cenospheres loaded with the various core materials are disclosed, as are building materials containing such compositions.
Claims10
A method of encapsulating a core material inside a cenosphere, the method comprising:
- contacting a cenosphere with an acid solution, thereby providing a perforated cenosphere;
- contacting the perforated cenosphere with the core material, thereby encapsulating the core material in the perforated cenosphere;
- and
- coating the perforated cenosphere encapsulating the core material with silica, alumina, or a polymer, wherein the coating is by spray drying;
- wherein the core material comprises a phase change material, and
- wherein the phase change material comprises a salt-water solution, a sugar alcohol, a paraffin, a fatty acid, a salt hydrate, a nitrate, a hydroxide, a hygroscopic material, or combinations thereof.
3 more elements
Dependencies are inferred from the claim text.