Start
Nov 01, 2018 - 17:00
End
Nov 01, 2018 - 18:00
Venue
Room 118 Chemical Engg Dept
Event Type
Speaker
Prof. Vinay A. Juvekar IITB
Title
Polymers at interfaces
Abstract: Adsorption of macromolecules from dilute solutions to interfaces is recognized as a powerful technique for interface modification. Polymers have ability to adsorb at the interfaces almost irreversibly and modify the interfacial properties such as energy electric charge wettability interfacial rheology etc. This makes them suitable for numerous applications. A few examples are: colloidal dispersion /flocculation emulsification/demulsification modification of crystal morphology pour-point depression drug delivery in biocompatible coatings in formulation of pesticide sprays sunscreen agents lubricants and flooding solutions in tertiary oil recovery. The crucial aspect which governs the efficacy and versatility of this technique for the final application is the character of the adsorbed layer and its extension into the adjoining phases. It is possible to fine tune these properties by choosing appropriate polymer architecture and functional groups. The aim of the talk is to present a mean field continuum model for polymer adsorption and its application for predicting interfacial properties. Starting with the development of the basic model its extensions to tackle a variety of cases are outlined. These include homopolymers polyelectrolytes block and branched copolymers effect of confinement on the structure of adsorbed layer and interaction among surfaces coated with polymers.Bio: Presently working as Emeritus Fellow at Department of Chemical Engineering Indian Institute of Technology Bombay. He did B. Chem. Engg. (1970) and Ph.D.(Tech.)(1976) from UDCT. He worked in UDCT as Associate Lecturer / Lecturer (1971-77) and in chemical industry (1977 to 1984). He joined IIT Bombay as Assistant Professor in 1984. His areas of research interest are electrochemical engineering interfacial science and engineering and multiphase reaction engineering. He has been technical consultant to several companies. He is recipient of Moulton Medal from the Institution of Chemical Engineers (UK) in 1977 and Herdillia Award from the Indian Institute of Chemical Engineers in 1996. He is a Fellow of Indian National Academy of Engineering.
This seminar is compulsory for students registered for course CL 702 or CL 704.