| Biography | |
|---|---|
 Prof. M.G.H. Zaidi G.B.Pant University of Agriculture & Technology, India |
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| Title: Magnetic Polymer Nanocomposites Derived through Dispersion of Siliconized Ferrofluid into Epoxy Resin in Supercritical Carbon Dioxide | |
| Abstract: Magnetic polymer nanocomposites (MPNs) are of immense importance in biotechnology1-5, stealth 6, inductive, capacitive materials, microwave absorbers7, electrical8 and electronic applications9. Physical properties and applications of MPNs are governed by qualitative dispersion of nanomagnetic materials and their interfacial adhesion with polymer matrix. However, inherent agglomerations among magnetic nanoparticles makes difficult in achieving the MPNs with uniform dispersion and physical properties1-9. The present lecture shall demonstrate a method of preparation of MPNs through dispersion of siliconized ferrofluid (FF) into epoxy resin (ER) in supercritical carbon dioxide (SCC), followed by curing with triethylene tetramine. SCC is the family member of supercritical fluids that is economically produced through operating carbon dioxide above critical temperature and pressure10-11. Due to pressure tunable density, diffusivity and solvating properties, SCC facilitates the enhanced dispersion of FF into ER that on curing with polyamines delivers MPNs. Dispersion of FF into ER was found progressive with pressure of SCC ranging 1200 to 1600 psi at 90 oC over 1hr.Dispersion of FF into epoxy matrix was revealed through diverse analytical methods based on microscopy, quantitative ultraviolet spectra, X-ray diffraction, magnetometry, laser induced break down spectra and DC conductivity measurement. MPNs synthesized through the present methods have shown improved impact, dispersion, DC conductivity, compressive strength, hardness, resistance against wear and thermal degradation with simultaneous reduction in their tensile behavior over cured epoxy. The proposed method of synthesis of MPNs offers a clean and scalable alternative to ultrasonication or mechanical mixing methods employed for dispersion of magnetic nanoparticles into ER to achieve the MPNs8. | |
| Biography: M.G.H.Zaidi is Physical Chemist, educator and academic administrator. He has conferred B.Sc. (1985), M.Sc. (1987) followed by Ph.D. degree in Chemistry (1992) from Lucknow University U.P. India. His title of doctorate thesis was "Synthesis of Some Newer High Temperature Resistant Polymers". He has been serving Govind Ballabh Pant University of Agriculture & Technology with great distinction and dedication since 1998. Dr.Zaidi has academic and administrative experience of more over 30 years in various capacities at several Indian Universities since 1991-92.He has been involved in formulation & direction of research projects as principal investigator in the area of supercritical processing of polymer materials since 1998. Prof. Zaidi has availed funding from Ministry of Defense, Department of Biotechnology, Department of Science & Technology, Uttarakhand Council of Science & Technology, University Grants commission and international private organizations for execution and propagation of research. Dr. Zaidi's research activities involve synthesis of polymer based materials through traditional methods and in supercritical fluids, their durability assessment and applications in structural engineering, electronics, energy storage and biomedical sciences. His contributions to research and development are in collaboration with reputed national laboratories and are recognized as author of patents, research publications, reviews, monographs, technical notes and book chapters in refereed international journals and scientific magazines. http://www.scholarpedia.org/article/User:MGH_ZAIDI | |
