Lyotropic liquid crystalline L3 phase silicated nanoporous monolithic composites and their production
US6638885B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2000 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | Apr 3, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A mesoporous ceramic material is provided having a pore size diameter in the range of about 10-100 nanometers produced by templating with a ceramic precursor a lyotropic liquid crystalline L3 phase consisting of a three-dimensional, random, nonperiodic network packing of a multiple connected continuous membrane. A preferred process for producing the inesoporous ceramic material includes producing a template of a lyotropic liquid crystalline L3 phase by mixing a surfactant, a co-surfactant and hydrochloric acid, coating the template with an inorganic ceramic precursor by adding to the L3 phase tetramethoxysilane (TMOS) or tetraethoxysilane (TEOS) and then converting the coated template to a ceramic by removing any remaining liquids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.