Sistematical study of the thermoreversible sol-gel transition of TiO2 coloidal suspensions modified by para-toluene sulfonic acid for building ordered mesoporous materials

• Grant number: 10/00135-5
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: March 01, 2010
• End date: January 31, 2013
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Sandra Helena Pulcinelli
• Grantee: Renata Cristina Kiatkoski Kaminski
• Host Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
• Associated research grant: 07/53073-4 - Mesoporous ceramics and multifunctional organic-inorganic hybrids prepared by sol-gel process, AP.TEM

Abstract

The aim of this project is to understand the mechanisms involved in the colloidal systems formation from poly(titaniuma oxide) species with surface modified by para-toluen sulfonic acid (PTSH) dispersed in isopropanol, that present a sticking thermo-induced reversible sol-gel transition. The effects of formulations parameters associated to the physico-chemical synthesis conditions on the thermoreversibility of the sol-gel transition will be evaluated from SAXS and QELS nanoscopic structural analysis, NMR and Raman local order spectroscopies and surface charges characterisatics. Focus will be done to the sol-gel process parameters that could support mesoporous materials preparation to be used as membranes, intelligent and/or controlled delivery devices. (AU)