Effect Of Plasma Treatment On The Mechanical
Properties Of Natural Fiber/PP Composites
Author(s)
B. S. Kim, M. H. Nguyen, B. S. Hwang & S. Lee
Abstract
Atmospheric glow discharge (AGD) was developed with industrial plasma
sources by using high voltage radio frequency (RF) excitation at KHz frequency
ranges. It is possible to produce a steady-state uniform glow discharge at
atmospheric pressure with various gases, thus eliminating the requirement for a
vacuum system to expose the materials to plasma. The RF frequency should be
in the limited range to produce AGD: if it is too low, the discharge will not
initiate and if it is too high, the plasma will form filamentary discharge between
the electrode plates or will be transformed to the arc discharge. The advantage of
AGD is to modify or coat the materials with good uniformity. The AGD plasma
polymerization can be used to modify the surface properties of wood powder as
well as natural fiber to improve the compatibility between the fiber surface and
PP matrix. The AGD surface modification process can allow the constituents to
disperse quite evenly within the matrix with a strong interfacial bonding between
the constituents and the matrix material.
Contact angles of AGD polymers of various monomers were measured by
goniometer and their surface energies were calculated, respectively, to find the
most suitable monomer, which was hexamethyl- disiloxane. Helium was used as
a carrier gas and the monomer modified the surface property by plasma
polymerization. The reactor is operated at room temperature while the surface is
modified at atmospheric pressure. Mechanical tests and characterizations by the
SEM were carried out for the natural fiber/pp composites.
Keywords: natural fiber composites, plasma treatment, atmospheric glow
discharge.
Keywords
natural fiber composites, plasma treatment, atmospheric glow
discharge.
Related Book
Other papers in this volume
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