| US 7,524,482 B2 | ||
| Titanium oxide-based sol-gel polymer | ||
| Luc Brohan, La Chapelle sur Erdre (France); Hari Sutrisno, Jatim (Indonesia); Yves Piffard, La Chapelle / Erdre (France); Maria Teresa Caldes-Rouillon, Nantes (France); Olivier Joubert, Brains (France); Eric Puzenat, Nantes (France); and Annabelle Rouet, Nantes (France) | ||
| Assigned to Centre National de la Recherche Scientifique (C.N.R.S.), Paris (France) | ||
| Appl. No. 10/502,399 PCT Filed Jan. 14, 2003, PCT No. PCT/FR03/00106 § 371(c)(1), (2), (4) Date Mar. 25, 2005, PCT Pub. No. WO03/064324, PCT Pub. Date Aug. 07, 2003. |
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| Claims priority of application No. 02 01055 (FR), filed on Jan. 29, 2002. | ||
| Prior Publication US 2005/0163702 A1, Jul. 28, 2005 | ||
| Int. Cl. C01G 25/02 (2006.01); C01G 27/02 (2006.01); C04B 35/00 (2006.01) | ||
| U.S. Cl. 423—608 [501/95.2] | 10 Claims |
| 1. A method of preparing a polymer composition essentially formed by a polymer based on titanium oxide, which is represented
by the formula TiOx(OH)y(H2O)z in which x+y+z=3, in the form of a gel or in the form of a sol, wherein: the polymer comprises fibers wound concentrically
with a periodicity, deduced from the space in between the fibers, of between 3.5 Å and 4 Å; each fiber is made up of TiO6 octahedra; each TiO6 octahedron shares two opposed edges with two adjacent octahedra in order to form infinite chains that grow along the axis
of a fiber; and two adjacent chains form double strands by the communing of edges comprising:
preparing a TiOCl2 solution in dimethylformamide (DMF) by introducing TiOCl2 dissolved in a concentrated aqueous HCl solution into the DMF, in proportions such that the concentration (CTi) of Ti atoms is less than 2M,
heating the solution thus obtained to a temperature between room temperature and 90° C.; and
holding the solution at this temperature for a certain time.
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