http://www.iitd.ac.in

http://tes.iitd.ac.in



Ashwini  Kumar  Agrawal
Professor
Ph.D. (U. Rochester, NY, USA)

B.K. Behera




Group Specialization

  • Fibre Science & Technology

Specialization

  • Fiber Manufacturing
  • Nanomaterials for Textile
  • Phase Change Materials for Heat Storage
  • Plasma Processing
  • Smart Textile

Research Interests:

    Fiber Manufacturing
  • Fibre is a unidirectional structure with high aspect ratio (length to dia ratio). This is acheived by orienting the polymeric chains into one principal direction. This imparts unique properties to the material such as high tensile and shear strengths and low moduli and makes the material suitable for variety of applications. Several polymers (both organic and inorganic) may be converted into fibers using melt or solution spinning. The group works on developing new fibers from different materials for new applications.

  • Nanomaterials for Textile
  • This primarily include two major areas: Nanofibers and nanofinishes. Nanofibers are unidimensional structure with diameter in ~100 nanometer. These fibers can be produced using electropsinning and converted to different structures by modifying the electrical field and other spinning parameters. The group is working in understanding the electrospinning process and develop technologies in the area of high efficiency filters, tissue culture, protective garments, and catalysis using both organic and inorganic nanofibers. Nanofinishes, on the other hand, are nanoparticles applied onto the fabrics for imparting functionality to textile substrates. The group is developing finishes based on silver, titania, ZnO, Sb2O5, and other nanoparticles and investigating approaches to impart durability and high function level.

  • Phase Change Materials for Heat Storage
  • Phase change materials can efficiently store and release energy as the temperature of the environbment goes up and down, respectively, WITH reference to a transition temperature. This property can be used in storing energy when in excess and releasing it when deficient. Also, it may provide buffering effect around a chosen temperature. However, to use these materials in textile, airconditioning and other applications, they need to be encapsulated in a non-porous shells (capsules). The group has sucessfully developed microencapsulation process for organic PCMs and is currently working on developing new inorganic PCMs.

  • Plasma Processing
  • The processing of textile materials usually involve high level of environmental pollution in terms of wasted chemicals and utilities. Plasma processing under atmospheric pressure is an upcoiming area which can substantially reduce the pollution load and impart variety of finishes and other effects to textile materials. The group has developed atmospheric pressure glow discharge reactor that can be integrated to a continuous textile operation for imparting such effects.

  • Smart Textile
  • The smart textile materials include responsive fibers, yarns and fabric that change shape, store/release heat/chemicals, and undergo variations in other properties with the changes in the environment or direct stimuli given to the material. They find potential applications in developing artificial muscles for robotics, drug delivery and surgical implants in biomedical applications, separation media in chemical industry and smart textile.