Yaa Manufacturing Procedure Of Carbon Fiber

Manufacturing Process of Carbon Fiber

Anup Kumar Mohanta
Dept. of Textile Engineering
College of Engineering as well as Technology,
Bhubaneswar, Odisha, India
Email: anup.unlimited.007@gmail.com

CARBON FIBER:
Carbon fibers are manufactured from 2 pre cursors known equally PAN (poly acrylonitrile) as well as pitch.

FROM PAN:

• PAN contains highly polar C-N groups that are randomly arranged on either side of the chain.
• Carbon filaments are moisture spun from a solution of PAN as well as stretched at an elevated temperature during which the polymer chains are aligned inwards the filament direction. Then the filament are heated at 200 to 300 ­0C for a few hours. 



Structure of carbon fiber

• At this stage the C-N groups located on the same side combine to shape a to a greater extent than stable as well as stiff ladder similar construction as well as about of the CH2 groups are oxidized.
• In the adjacent stage the PAN filaments are carbonized past times heating at a controlled charge per unit of measurement betwixt thou to 2000 0C inwards an inert atmosphere.
• Tension is maintained on the filament to foreclose shrinkage as well as to ameliorate molecular orientation.
• Subsequently the carbonized filaments are heated inwards a higher house 2000 0C, where their structures becomes to a greater extent than oriented as well as turns towards a truthful graphite shape amongst increasing estrus handling temperature.
• At this stage the graphitized filaments accomplish a high tensile modulus, but their tensile pull may endure relatively low.
• Tensile pull tin laissez passer on the axe endure increased past times hot stretching inwards a higher house 2000 0C.

FROM PITCH:

• Pitch is a byproduct of crude oil refining, as well as is a lower toll raw fabric than PAN.
• The carbon atoms inwards pitch are arranged inwards depression molecular weight aromatic band patterns.
• Heating to temperature inwards a higher house 300 0C polymerizes these molecules into long 2 dimensional canvas similar structure.
• The highly viscose land of pitch at this stage is called mesophase.
• Pitch filaments are produced past times melt spinning the mesophase pitch through a spinneret.
• The filaments are cooled to freeze the molecular orientation as well as thence heated betwixt 200 to 300 0C inwards oxygen atmosphere to stabilize them as well as brand them infusible.
• In the adjacent measuring the filaments are carbonized at 2000 0C.
• Rest of procedure of transferring the construction to graphitic shape is similar to that followed for PAN precautions.

Standard Fiber Properties

USES:
Carbon fibers are used inwards the next fields: Aerospace, sporting goods, automobiles, air current turbine blades, military, medical applications as well as many to a greater extent than fields.

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