Type of Document Dissertation Author Rmaile, Hassan Hussein Author's Email Address firstname.lastname@example.org URN etd-03252004-143258 Title Structure-Property Relationships in the Design, Assembly and Applications of Polyelectrolyte Multilayer Thin Films Degree Doctor of Philosophy Department Chemistry and Biochemistry, Department of Advisory Committee
Advisor Name Title Joseph B. Schlenoff Committee Chair Alan G. Marshall Committee Member Bruce R. Locke Committee Member Edwin F. Hilinski Committee Member John G. Dorsey Committee Member Keywords
- ATR-FTIR Spectroscopy
- Membrane Separations
- Surface Modifications
- Chiral Separations
- Gated Permeabilties Of Drugs And Vitamins
Date of Defense 2004-03-02 Availability unrestricted AbstractUltrathin films consisting of an alternating sequence of positively and negatively charged polyelectrolytes have been prepared by means of the electrostatic layer-by-layer sequential assembly technique. To augment their typical applications in the water treatment, personal care as well as the pulp and paper industry, the structure and the design of these polyelectrolytes were tailored synthetically to satisfy the requirements of different types of applications. Some were used for surface modifications, hydrophobic and hydrophilic coatings, corrosion protection, conducting and biocompatible surfaces. Others were found to be very efficient for membrane and chromatographic applications. The ease with which these multilayer coatings can be constructed, their robustness and stability make them very good candidates for industrial applications.
The dissertation focuses mainly on the structure-property relationships of these polyelectrolytes and their corresponding thin films. Various polyelectrolytes were synthesized or modified in a strategic approach and gave novel and promising properties. Some of them exhibited permeabilities that were higher than any membranes reported in the literature. Also, some are potentially very useful for designing drug delivery systems such as tablets or encapsulations since they were shown to control the permeability of sample drugs and vitamins very efficiently based on their sensitivity to pH changes. Other synthesized polyelectrolytes proved to be very effective in preventing protein adsorption or promoting cell growth and differentiation. Some systems were very useful as robust stationary phases for simple chiral separations in capillary electrochromatography. Along with modifications and improvements, the approach might one day be applied commercially for chiral separations using high performance liquid chromatography and replace currently used stationary phases.
Last but not least, the potential for these polyelectrolytes and their corresponding films is immense. Slight variations in their structural properties could transform into significant improvements in their physical properties and behavior. Hydrophobicity, permeability, swelling, thickness and stability are very important properties of these films and could be tuned to achieve new and unprecedented properties.
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28.8 Modem 56K Modem ISDN (64 Kb) ISDN (128 Kb) Higher-speed Access 01-hhr-Prelims.pdf 218.51 Kb 00:01:00 00:00:31 00:00:27 00:00:13 00:00:01 02-hhr-Chapter1.pdf 247.17 Kb 00:01:08 00:00:35 00:00:30 00:00:15 00:00:01 03-hhr-Chapter2.pdf 2.23 Mb 00:10:20 00:05:19 00:04:39 00:02:19 00:00:11 04-hhr-Chapter3.pdf 1.34 Mb 00:06:11 00:03:11 00:02:47 00:01:23 00:00:07 05-hhr-Chapter4.pdf 1.18 Mb 00:05:28 00:02:48 00:02:27 00:01:13 00:00:06 06-hhr-Chapter5.pdf 434.40 Kb 00:02:00 00:01:02 00:00:54 00:00:27 00:00:02 07-hhr-Chapter6.pdf 400.88 Kb 00:01:51 00:00:57 00:00:50 00:00:25 00:00:02 08-hhr-Chapter7.pdf 380.01 Kb 00:01:45 00:00:54 00:00:47 00:00:23 00:00:02 09-hhr-Chapter8.pdf 77.82 Kb 00:00:21 00:00:11 00:00:09 00:00:04 < 00:00:01 10-hhr-References.pdf 173.36 Kb 00:00:48 00:00:24 00:00:21 00:00:10 < 00:00:01