Electronic Theses and Dissertations

Identifier

45

Date

2010

Document Type

Thesis

Degree Name

Master of Science

Major

Chemistry

Concentration

Analytical Chemistry

Committee Chair

Tarek R Farhat

Committee Member

Tomoko Fujiwara

Committee Member

Yongmei Wang

Abstract

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.

Comments

Data is provided by the student.

Library Comment

Dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.

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