Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.657310
Title: A design of experiment and inkjet printing approach to material formulation
Author: Lopez-Pedrosa, Jose Maria
Awarding Body: University of Edinburgh
Current Institution: University of Edinburgh
Date of Award: 2009
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Abstract:
The overall aims of this thesis were the preparation, using inkjet printing and robotics, of libraries of multi-component formulations for the design of new materials (pigment based inks, polymer blends and lipoplexes) applied to inkjet printer, cell binding and cell transfection, respectively. This was followed by their screening and the assessment of their suitability for its design, looking at which main variables (factors) and settings (range) influenced the properties of the formulations. A key component of the preparation of these libraries, was the application of a design of experimental methods, which directed the preparation of the formulations and allowed the development of mathematical models for material prediction and optimisation, as follows: (1). Formulations of pigment based inks, which were prepared and analysed for determination of which components provided a suitable viscosity for good jet performance and printing quality. Model development showed that diethyleneglycol was the main mixture factor that controlled viscosity, while voltage and pulse width were the main process factors that provided an increase of drop velocity and spread on substrate. (2). Formulations of polymer blends were assessed for cell binding. The best blends were poly(DL-lactide-co-glycolide) and chitosan. Rheological analysis showed that blends containing 50 % w/w of chitosan gave the highest values of viscosity and shear thinning behaviour, showing their loss moduli(G”) greater than their storage moduli (G’). (3). Lipoplexes are combinations of DNA and cationic lipids that are used to transfect cells. Formulation libraries of cationic lipids were prepared, with model development, showing that the ratios of cationic lipid/DNA and co-lipid/cationic lipid were the most important factors, and were inversely proportional to transfection.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.657310  DOI: Not available
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