Layer-by-layer (LbL) deposition is carried out by alternately depositing positively and negatively charged polyelectrolytes, and this method has become a very versatile method in preparing very thin polyelectrolyte multilayer composite film. During the deposition the polyelectrolyte self-assembles and self-organizes on an oppositely charged substrate via electrostatic or hydrogen bonding interactions, so it is possible to include nanoparticles and biological molecules of different shapes as far as the objects are charged. Similarly, two kinds of anionic polyelectrolytes (or cationic polyelectrolytes) can be used together after mixing, in order to induce a post reaction in the LbL film, in a real application.<br/>In this study, a highly sulfonated poly(phenylene oxide) (sPPO) was prepared from PPO, and used as the major component in the negatively charged polyelectrolyte mixture. Also polystyrenesulfonic acid copolymer containing azide moiety (sPS-az) was prepared, and used together with the sPPO, as the minor component in the negatively charged polyelectrolyte mixture. The mixed polyelectrolyte solution was co-deposited with a cationic polyelectrolyte, poly(dimethyldiallylammonium chloride) (PDDA) in order to make LbL film which is crosslinkable by UV. Formation of LbL film was studied by UV/vis spectroscopy, and the composition of the film was characterized by FTIR. The result was interpreted and correlated with the differences in the solubility parameters of the two anionic polymers.

FTIR characterization of co-deposited LbL film of sPPO and sPS copolymer with PDDA

253rd National Meeting (2017)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.