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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 15, Number 8
BKCSDE 15(8)
August 20, 1994 

Langmuir-Blodgett Films of Perfluoroalkyl Monomaleate Copolymers on Porous Substrate
Hyein Jeong, Burm-Jong Lee*, Young-Soo Kwon
Stable polyion-complexed polymeric monolayers were prepared by spreading perfluoroalkyl monomaleate copolymers, C2F8MA-VE2 and C2F8MA-VE3, on a aqueous poly(allylamine) subphase. The monolayer properties have been studied by the surface pressure-area (π-A) isotherms. The C2F8MA-VE3 containing longer oligoethyleneglycol pendant showed more expanded monolayer phase than the C2F8MA-VE2. The polyion-complexed monolayers were transferable on various substrates, and the resulting Langmuir-Blodgett (LB) films were characterized by FT-IR spectroscopy and scanning electron microscopy (SEM). Two-dimensional crosslinking to form a polymer network was achieved by amide formation through heat treatment under vacuum with concurrent removal of perfluoroalkyl tails. SEM observation of this film on a porous membrane filter showed that the four layer film was sufficiently stable to cover the filter pore size of 0.1 μm. The C2F8MA-VE3 revealed better covering capability than the C2F8MA-VE2. Immersion of this film in water or in benzene did not cause any change in its appearance and in Fl-IR spectra.
650 - 653
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