Abstract
Graft polymerization induced by ionizing radiation is a powerful
tool in materials science to modifying the physical properties of
polymers. Chitosan is a biocompatible, biodegradable, antibacterial, and
highly hydrophilic polysaccharide. In this work, we report the
obtaining of amphiphilic polymers through graft polymerization of
acrylic monomers (methyl acrylate, t-butyl acrylate, and hexyl acrylate)
onto chitosan. The polymerization reaction was carried out by
simultaneous irradiation of monomers and chitosan using a gamma
radiation source of 60Co. The formation of Langmuir films of
amphiphilic polymers was studied at the air-water interface through
surface pressure versus main molecular area isotherms (Π-A) and
hysteresis cycles of compression and decompression. Finally, it was
analyzed the transferring of Langmuir films towards solid substrates to
obtaining Langmuir-Blodgett films with potential application as an
antibacterial coating. The microstructure of the Langmuir-Blodgett films
was characterized by AFM microscopy observing a regular topography with
roughness ranging between 0.53 and 0.6 μm.
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