7 Micro-fibers and Nanofibers.ppt

Micro-fibers and Nano fibers
Micro fibers
Definition
Fibers of < 1 denier
Manufacturing of microfibers
ponent fibers:
Island in sea
Citrus
Island in sea
Manufacturing process
Suspension of droplets of ponent in matrix of the other
ponents should have similar melting temperatures
Can posite fiber
To obtain the microfiber from posite fiber, the matrix should be soluble such as polyvinyl alcohol
Extremely small fibers possible: < denier
Island in sea
Application
synthetic leather
specialty wipes
ultra-high filtration materials
artificial arteries
Citrus or Segmented pie
Manufacturing
ponents: patible but with similar Tm such as PET and Nylon 6
Citrus like or hollow citrus
Nano fibers
Electrospinning of nano fibers
Principle
When electrical force at the surface of a polymer solution or polymer melt es the surface tension, a charged jets is ejected.
Device
Ma