Dr. Tanveer Iqbal ( Associate Professor )
Ever since my early days at school, I used to inquire from my science teachers about nature of surfaces. “God made the solids – but surfaces were the work of devil” as quoted by Wolfgang Pauli. I used to ask myself questions like: “Why some of the surfaces are hard while others soft? “How a surface changes from smooth to rough with usage? I developed a basic strength for the understanding these questions studying chemical engineering at undergraduate level. My final year project on quality control of paints, where I first time came across terms like mar resistance and surface deformation, proved nothing but a catalyst to enhance my desire to study surfaces. I worked on surface mechanical characteristics of polymers with Prof. Brian J. Briscoe at Imperial College London. My principal area of research was the surface mechanical characterization and tribological studies of polymers and their composites at the micro as well as nano scales. In particular, I have worked on the surface mechanical properties based on the indentation and the scratching response of amorphous and semicrystalline polymeric surfaces and their composites. Surface deformation mechanisms and hardness determines product life and usage and hence plays a vital role in material selection and design. I have developed “hands-on” technical expertise in the following experimental techniques: Nanoindentation Hardness, Scratch Hardness & Deformation Characterization, Scanning Electron Microscope (SEM), Differential Scanning Calorimetry (DSC), Atomic Force Microscopy (AFM), Gel Permeable Chromatography (GPC), Tensile and Compression Testing, Polymer Modifications, Surface Coatings and Characterizations and Rheology of suspensions. I have strong tendency to learn new research tools and techniques as well as design experiments and “in-house” experimental setup/unit building.
In future, my aim is to work in different research areas of Chemical Engineering mainly relating to material surface characterization. In particular I would prefer working on the following research areas: Nanoindentation and Nanoscratching (hardness and deformation) response of material surfaces, Morphology of polymeric surfaces, Atomic Force Microscopy (AFM): Molecular and Surface Interactions, Human skin friction and deformation mechanisms, Friction and losses reduction in piping flow systems, Solvent and Gas Sorption in polymers, Polymerization, Surface modifications of Polymers, Wear of material surfaces and Boundary Lubrication.
My short term goals include the construction of scratch deformation maps of fibre oriented polymer composites and liquid crystalline polymers (LCPs) using scratching conditions and deformation processes from SEM images of scratched polymeric surfaces. The main objective will be to formulate a general strategy for constructing scratch deformation maps of composites and LCPs. These maps will possibly contains data ranging scratching velocity, normal loads, cone angle of indenter, coefficient of friction, scratch hardness, fibre loadings and damage modes of polymeric surfaces.
My long time goals are to study the morphological characteristics of polymers and their effects upon surface properties. This might include the use of X-ray, transmission electron microscope (TEM) and neutron scattering techniques although the precedents have not been clearly established. The nanoindentation technique would provide a convenient means to understand morphological description of the polymeric surfaces. Environmental factors like solvent plasticization, thermal and mechanical disruptions severely degrade the polymeric materials. An experimental account to investigate the environmental impacts on polymeric materials is a future goal. Finally, the subsurface damages in the deformed polymeric surfaces may be a practically significant aspect yet to be usefully explored.
In summary the future would yield opportunities to examine and rationalize the value of small scale indentation and scratching in the examination and optimization of the surface and near surface morphology of polymers.
Latest Qualification : Ph.D. Chemical Engineering
Dr. Tanveer Iqbal