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The hydrophilic lubricious surface, could provide well hand-
ling in dry statebut become slippery upon exposure to an
aqueous body fluid, were required for medical devices. Such
lubricious surface would facilitate insertion or removal
off a medical device into or out of apatient. This surface
lubricity serves to reduce frictionin motion ofdevice or
diminish tissue damage. The purpose of the present study was
to modify hydrophobic polymer surfaces using the graft
copolymerization of water-- soluble monomers. In order to
obtain a hydrophilic and slipperym surface as wetted state for
medical use, the high density poly- ethylene (HDPE),
Polypropylene (PP), polyoxymethylene (POM) and polyethylene
terephthalate (PET) thin films were used as sub- strate,
whereas acrylamide (AAm) and acrylic acid (AAc) were chosen
for the surface-grafted onto the substrates.The coe-n
fficient of friction (μ) against glassplate on polymer films
in water is used to evaluateits lubricity. The hydrophobic
polymers treated by above two methods could alter the
hydrophilic surface ,and have alowervalue oflubricity under the
wet state.
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