Tariq A. Hassan, Ph.D. (2010) 


Dissertation Topic:
  Synthesis, Fabrication, Thermal and Mechanical Characterization of Egg Shell Based Bio-Nanocomposites
Major Professor:  Dr. Vijaya Rangari, Associate Professor of Materials Science & Engineering
M.S.:  Mechanical Engineering, Tuskegee University
B.S.:  Chemical Engineering, University of Khartoum, Sudan, Africa
Employment:  Research Assistant Professor of Chemical Engineering, Tuskegee University


Dissertation Abstract:

Composite materials are widely used in today's world and continue to grow at a rapid pace due to their unique characteristics. These lightweight materials exhibit excellent mechanical properties, high corrosion resistance, dimensional stability, and low assembly costs. They are extensively used in many engineering applications in the aerospace, automotive, marine, infrastructure, military, sports, and industrial fields. They consist of two or more identifiable constituents of different natures. Traditionally, composites have been derived from petroleum and mineral recourses; however, as the applications for polymeric materials increase, finding alternative sources of these materials has become critical with the high rate of depletion of petroleum resources. Equally important, a growing public concern about environmental pollution and hazards associated with the use of petroleum derived products and the accumulation of non-destructible solid waste, in addition to the new environmental regulations have forced the search for new composites and green materials, that are environmentally friendly. All of these factors have stimulated the development and design of bio-based, biodegradable polymers and composite materials, which are compatible with the environment.

The present study explores synthesis, fabrication, and characterizations of calcium carbonate nanoparticles derived from chicken eggshells. These bio-based calcium carbonate particles will be further processed to reduce their sizes to nanoscale and surface modified using mechanochemical and sonochemical techniques. As-prepared bio-calcium carbonate nanoparticles will be used as reinforcing fillers in Bioplast GS 2189, a thermoplastic resin produced by Biotec, Germany, and Polylite® 31325 a thermoset resin produced by Reichhold, USA to fabricate bio-nanocomposites. Both of these polymer resins are bio based polymers that are made from renewable resources. As-prepared bio-nanocomposites will be characterized for their thermal, mechanical, and microscopic analysis to understand their properties for structural application.