Method for the production of polymeric membranes having an ordered arrangement of high-aspect-ratio nanopores, by means of heavy ion bombing
US9376538B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2010 |
| Grant date | Jun 28, 2016 |
| Priority date | — |
| Expiry date | Feb 25, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A nanoporous polymeric membrane is obtained by bombing a polymer film by means of high energy focused heavy ion beams and subsequently performing chemical etching to remove the portions of the polymer film in the zones degraded by the ion bombing, in such a manner to obtain pores passing through the polymer film. The heavy ion bombing is performed after interposing between the source of ions and the polymer film, adjacent to the film, an amplitude mask having an ordered arrangement of nanopores and having sufficient thickness to prevent the passage of the heavy ions that are not directed through the pores of said amplitude mask, in such a manner to obtain in the polymer fill an ordered arrangement of nanopores having an aspect-ratio at least exceeding 10 and preferably exceeding 100.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.