Date of Award
Master of Science
Tarek R Farhat
ABSTRACTA poly(ethylene oxide) (PEO) and poly(acrylic acid) (PAA) layer-by-layer (LBL) coating was self-assembled on a PEO substrate under non-aqueous conditions using ethanol. After lysine, ferricyanide, and Prussian blue (PB) had been loaded into the PEO granules, the resulting PEO polymer gel was dried to obtain strips that could be dip-coated onto silica wafers to obtain planar base coats with a bilayer thickness of 115 Aoat pH = 6 and 350 Aoat pH = 2. Further analysis revealed that upon coating, retention in the PEO core was > 95% for PB, ~80% for ferricyanide, and ~73% for lysine. A dissolution test of PB loaded on coated and uncoated PEO strips showed that the former remained intact under an aqueous solution of pH ≤ 6.5 for at least 20 minutes whereas the latter dissolved within 3 minutes. These hydrogen-bonded ethPEO/PAA LBL films degrade atpH>4.4 under aqueous conditions.
dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.
Ramachandra, Sudha, "LOADING AND COATING WATER SOLUBLE POLY(ETHYLENE OXIDE) SUBSTRATES UNDER ETHANOL USING THE LAYER- BY-LAYER TECHNIQUE" (2010). Electronic Theses and Dissertations. 30.