Method to fabricate microcapsules from polymers and charged nanoparticles
US7829119B2 · kind B2 · utility
1Cited by
1References
28Claims
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Key dates
| Filing date | Oct 20, 2004 |
| Grant date | Nov 9, 2010 |
| Priority date | — |
| Expiry date | May 1, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB82Y30/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for making hollow nanoparticles, comprises a) providing an amount of a polyelectrolyte having a charge, b) providing an amount of a counterion having a valence of at least 2, c) combining the polyelectrolyte and the counterion in a solution such that the polyelectrolyte self-assembles to form spherical aggregates, and d) adding nanoparticles to the solution such that nanoparticles arrange themselves around the spherical aggregates. The polyelectrolyte may have a positive or negative charge. The charge ratio R of total charge of the counterions to the total charge of the polyelectrolyte is greater than 1.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.