Electrospinning

Defination,why do we say electrospinning,other technique,Parameter,Process,material of scaffolds,nanotechnology

1. Topic Electrospinning

2. WELCOME TO MY PRESENTATION Name: Md. Ranas Hossain Id: 12131107005 Intake: 7 th Program: B.Sc. In Textile Engineering Bangladesh University of Business & Technology (BUBT)

3. Electrospinning is a fiber production method which uses electric force to draw charged threads of polymer solutions up to fiber diameters in the order of some ten nanometers. Electrospinning shares characteristics of both electrospraying and conventional solution dry spinning of fibers. What is Electrospinning

4. Mainly used in voltage for this reason we can called Electrospinning Usually we shall used 10-50 kv voltage By Electrospinning process we can produced nano fiber 1-100nm diameter fibers are nano fiber Why do we say Electrospinning

5. Image of Nano fiber

6. When a sufficiently high voltage is applied to a liquid droplet, the body of the liquid becomes charged, and electrostatic repulsion counteracts the surface tension and the droplet is stretched; at a critical point a stream of liquid erupts from the surface. This point of eruption is known as the Taylor cone. If the molecular cohesion of the liquid is sufficiently high, stream breakup does not occur and a charged liquid jet is formed. Process

7. As the jet dries in flight, the mode of current flow changes from ohmic to convective as the charge migrates to the surface of the fiber. The jet is then elongated by a whipping process caused by electrostatic repulsion initiated at small bends in the fiber, until it is finally deposited on the grounded collector. The elongation and thinning of the fiber resulting from this bending instability leads to the formation of uniform fibers with nanometer-scale diameters.

8. Figure

9. Molecular weight, molecular-weight distribution and architecture (branched, linear etc.) of the polymer Solution properties (viscosity, conductivity and surface tension) Electric potential, flow rate and concentration Distance between the capillary and collection screen Ambient parameters (temperature, humidity and air velocity in the chamber) Motion and size of target screen (collector) Needle gauge Some parameter used in Electrospinning

10. Coaxial Electrospinning Melt Electrospinning Emulsion Electrospinning Other tecnique of Electrospinning

11. Synthetic material 1.Polyacticacid 2.Polyurathene 3.Polycaprolactum 4.Polyactic Glycolic acid 5.Hydrogels Natural polymer 1.Collagen 2.Alginate 3.Chitosan Material used as scaffolds

12. Fabrication of nano fibers Surface modification Nano praticle composite fibers Nanotechnology in Textile

13. Artificial organ components Tissue engineering. Living cells can be co-deposited with electrospun material. Endogenous Tissue Growth End use

14. That’s all of my presentation and thank you all End