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PTFE Nanopowder

PTFE(Polytetrafluoroethylen) is a white colored thermoplastic which has a high corrosion and heat resistance. Having significantly low friction coefficient makes it an outstanding material in various applications such as seals, O-rings and gasket etc. Also, it is used with other polymers or used as a reinforcing material in composites for special applications. Since it is hydrophobic material, it is also a non-wetting material. PTFE nanopowder has a structure that is made up of only fluorine and carbon atoms shown in the Figure 1. Another important property of PTFE is that can be extruded easily which makes it convenient in shaping operations such as insulation of electric wires and unsintered tapes.
Properties of PTFE Nanopowder
  • Thermal Properties: Due to its high crystalline arrangement of carbon and fluorine atoms, PTFE has high thermal stability and has a high melting point of approximately 342°C. This property allows high temperature shaping operations which is not possible with most of the other polymers.
  • Chemical Properties: PTFE nanopowder is a chemically inert material due to strongly bonded carbon and fluorine atoms. It gives no reaction with common reagents such as hydrofluoric, hydrochloric, and chlorosulfonic acids even at high temperatures. It is insoluble in organic solvents.
  • Optical Properties: PTFE nanopowder reflects high amount of the light and has a high diffusion coefficient. Thus, it shows good optical properties and performance on the most part of the light spectra from ultra-violet to infra-red when it is exposed to light.

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    Manufacturing process of PTFE
    PTFE is obtained by polymerization of tetrafluoroethylene (TFE) monomer to form PTFE molecule.
    Casting Techniques of PTFE
    One of the widely used method for casting of PTFE is molding method. Molding method has different types of processes such as compression molding, injection molding, extrusion molding and blow molding. Compression molding is the most common one to cast PTFE.
    Another method used for casting of PTFE is blending. Types of blending process are solution blending and melt blending.


    Applications of PTFE
    Automotive industry: PTFE is mostly used in gear systems of the cars for lubrication purposes because all bearing requires oil or grease. It is used as a self-lubricating ball bearing due to its low surface energy.
    Petrochemical and power industries: Due to its tribological property, it is used as a functional material in machining equipment such as gaskets, rings, seals etc.
    Chemical industries: PTFE is high-resistant to chemical attacks which makes it preferable in chemical processes. PTFE is used as a coating material for acid containers, tubes, hoses, and valves.
    Electrical applications: PTFE is extensively used as an insulating material in electrical devices regardless of the size of the components. Most commonly, it is used as a wire insulator.
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