Tensoactives and polymers: dynamic and chemical and photochemical reactivity

• Grant number: 94/03505-3
• Support Opportunities: Research Projects - Thematic Grants
• Start date: September 01, 1995
• End date: June 30, 2000
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Omar Abou El Seoud
• Grantee: Omar Abou El Seoud
• Host Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant(s): 99/05153-0 - 1) spectrophotometric study of the interactions of cationic dyes and clay particles in aqueous suspension., AR.EXT; 98/03064-8 - A photophysical study of the microdomains in pss-nbve block and random copolymers., AR.EXT; 98/03674-0 - Radha Ranganathan | California State University Northridge - Estados Unidos, AV.EXT; 97/02231-5 - Mecanisms for interactions of organic molecules and clay particles in aqueous suspensions., AR.EXT; 96/01859-8 - Photochemical determination of the interactions between surfactants and polyelectrolytes, AR.EXT

Abstract

The present project is on the chemistry of interfaces formed by surfactants and polymers in solution. In appropriate solvents surfactants form organized assemblies (aqueous and reverse micelles oil/water and water/oil microemulsions, liquid crystals) that are capable of solubilizing substrate, catalyze chemical and photochemical reactions, and shift chemical equilibria. On the other hand, there is an increasing interest in studying the process of aggregation in polymer solutions. The following points are of interes (1) dependence of the properties of the interface on the surface potential and the ions present; (2) solubilization by surfactants, including its effect on the physico-chemical properties of the solubilizate; (3) reactivity modifications of chemical and photochemical reactions by interfaces; (4) new applications of surfactants and polymers, polymerization at interfaces, and funcionalization of natural polymers. (AU)