XINAN ZHOUDEC-2-2008

Review on nanofiber and applications

Outlines

Introduction to nano-fiberFabrication of Polymer nanofibersApplications

Introduction to nano-fiber

Diameter of polymer fiber meterials: Submicrons or nanometersAmazing characteristics:

• Very large surface area to volume ratio• Flexibility in surface functionalities• Superior mechanical performance (stiffness and

tensile strength compared with any other known form of the material.

Electrospinning

A typical electrospinning set-up using a grounded static collector.

•Non-woven form •Small number of applications:•Filtration•Tissue scaffolds•Implant coating film•Wound dressing

•Single nanofibers or uniaxial fiber bundles are needed.

Fiber alignment

(A) Set-up for controlling fibre deposition area using rings as auxiliary electrodes.

(B) Electric field profile of the region between the syringe needle and the collection plate with the ring as auxiliary.

(C) Schematic diagram of parallel auxiliaryelectrode arrangement.

(D) Electric field profile from the spinneret to the parallel auxiliary electrodes.(E) Schematic diagram of a knife-edge rotating disc as a collector. (F) Electric field profile from the tip of the spinneret to the knife.

Nanoparticles

Applications

Carbon-loaded elastomer-sensorized garment for kinesthetic monitoring developed at the University of Pisa.

The Intelligent Knee Sleeve is a biofeedback device using PPy sensors that monitors the

wearer’s knee joint motion.

Applications

Lumalive textile garment from Philips features flexible arrays of colored light-emitting diodes fully integrated into the fabric. (Courtesy of Philips.)