Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 35 for “"solvent casting"”.
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PRINTING MUCOADHESIVE AND ORODISPERSIBLE FILMS FOR THE PERSONALIZATION OF THERAPY
… the enzyme β-galactosidase, and compared with solvent casting. While HMRE resulted in the thermal degradation of the protein, enzymatic activity was completely preserved in the ODF obtained by solvent casting, which were able to digest lactose contained in milk in simulated gastric media. The …
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Electrostatic powder deposition as a dry powder process to prepare orodispersible films
… ODFs are predominantly manufactured by solvent casting using aqueous or organic solvents. However, this process may be limited by long drying times for aqueous systems, required solvent handling capabilities and residual solvent testing for organic solvents, or due to moisture or solvent …
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Effect of Laser Induced Crystallinity Modification on Degradation and Drug Release of Biodegradable Polymer
… during the PLLA film formation processes. Solvent casting, spin coating, and subsequent annealing are conducted. The resulting morphology, crystallinity, molecular order, conformation, and intermolecular interaction are examined using optical microscopy, wide-angle X-ray diffraction, and …
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Fabrication of zein nanostructure
… used zein film fabrication processes which were solvent casting and extrusion blowing methods. The two methods resulted in partially exfoliated nanocomposite structures. The impact of nanoclays on the physical properties of zein films strongly depended on the film preparation techniques. The …
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Blends of Biodegradable Thermoplastics With Lignin Esters
… lignin (L) and lignin esters were prepared by solvent casting and melt processing. Among the biodegradable thermoplastics were cellulose acetate butyrate (CAB), poly-hydroxybutyrate (PHB), poly-hydroxybutyrate-co-valerate (PHBV), and a starch-caprolactone blend (SCL). Lignin esters included …
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Development, Characterization, and Fundamental Studies on Molecular Ionic Composites and PBDT Hydrogels
… formation processes, the "ingot" method and the "solvent casting" method, which allow for the use of many different ionic fluid sources to further tune MIC properties. The following chapters build to the fundamental knowledge and our current understanding of the wide variety of materials that can …
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An in vitro evaluation of tyrosine derived polyarylates and polycarbonate as polymeric scaffold for human mesenchymal stem cells osteogenic differentiation
… onto 96-well cell culture plates using the solvent casting technique. The human MSCs isolated from the bone marrow were seeded at a fixed density of 3 x 1 0^4 cells/cm2 in 96-well plates containing coated polymers. The cells were grown for 16 days in the presence or absence of osteogenic …
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Effects of Therapeutic Radiation on Polymeric Scaffolds
… gelatin. Porous scaffolds were fabricated using solvent casting and/or salt leaching techniques. Scaffolds were placed in phosphate buffered saline (PBS) and exposed to a typical cancer radiotherapy schedule. A total dose of 50 Gy was broken into 25 dosages over a three-month period. PBS was …
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Process-Structure-Property Relationships of Cellulose Derivative/Thermoplastic Urethane Polymer Composites
… composites are often fabricated through solution casting using hazardous organic solvents to achieve better dispersion, which sacrifices their scalability and geometric versatility. To fully harness their potential, it is essential to transition these systems toward melt-processable, …
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Development of biodegradable implants for sustained drug delivery
… levothyroxine sodium were fabricated using solvent casting and demonstrated promising in vitro release rates for the treatment of hypothyroidism (a common condition which can have debilitating side effects and result in high costs to the health service or patient if not managed effectively). …
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Self-Assembly of Block Copolymers in External Fields
… copolymers of complex architecture, a new solvent-based procedure is introduced, i.e. the block copolymer microdomains are aligned by application of an electric field (E ~ 1 - 2 kV/mm) during solvent casting of bulk samples. In order to elucidate the dominating parameters and governing …
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Manufacture of metal-based nanoparticles and their incorporation into plastic materials for the development of active antimicrobial food packaging
… employed to manufacture antimicrobial films via solvent casting, extrusion or coating techniques. The resulting films were assessed in terms of their mechanical, thermal, barrier and antimicrobial properties. Surface modification of commercial polymer films using piranha solution or UV/ozone …
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Polylactic Acid based Blends and Composites for Material Extrusion 3D Printing: Formulation, Characterization, and Processing
… regardless of the processing method used (solvent casting or melt compounding). More importantly, CNC-g-ECO demonstrated enhanced thermal stability and completely mitigated discoloration and thermal aging, which are common issues in CNC-based composites. Finally, this thesis investigated …
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Characterization of Hydrophobically Modified Titanium Dioxide Polylactic Acid Nanocomposite Films for Food Packaging Applications
… method. T-PLA and OT-PLA were prepared by solvent casting. TiO2 and OA_TiO2 were analyzed by X-ray diffraction, Fourier transform infrared spectroscopy, thermal analysis and dynamic light scattering. The barrier properties to oxygen and water vapor, morphology, mechanical properties, …
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Miscibility of polymer blends
… has been done on polymers in solutions or on solvent cast specimens and therefore on ternary systems. The role of solvent has not yet been fully evaluated and it was of interest to compare the results on solvent cast samples with those prepared by mechanical blending and by diffusion. …
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Developing a single dressing containing both antifungal and antibacterial drugs for treating mixed infections in diabetic foot ulcers
… dressings were prepared as films and wafers by solvent casting and freeze-drying technique respectively, with ciprofloxacin (CIP) and fluconazole (FLU) as model antibacterial and antifungal drugs respectively. The dressings were physically characterized by scanning electron microscopy (SEM), …
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Investigation of the application of polylactic acid-calcium phosphate composite materials as novel periodontal barrier membranes
… PLA-Ca P composite films were produced by the solvent casting method. The Ca P powders and the PLA-Ca P composite films were characterized. The degradation of PLA-Ca P composites was analysed in phosphate buffer saline (PBS). The bioactive potential of the composite films was determined in …
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Investigation of polymers used in lithium oxygen batteries as electrolyte and cathode materials
… based gel polymer electrolytes were prepared by solvent casting and employed as electrolytes in lithium oxygen batteries. The stability of the gelled electrolyte with tetraethylene glycol dimethyl ether has been greatly increased than the liquid one. The as-prepared polymer electrolyte was …
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Anion Exchange Membranes (AEMs), based on Polyamine Obtained by Modifying Polyketone, for Electrochemical Applications
… was made with a modified polyketone using a solvent casting method, followed by iodomethylation and ion exchange with KOH (PK-PDAPm). Every step in the synthetic process was confirmed by Fourier Transform InfraRed spectroscopy (FTIR). Nuclear Magnetic Resonance (NMR) spectroscopy was also …
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Study of controlled release of active pharmaceutical ingredients from functionalized nanoclays and polymer matrices
… differing in particle size or crystallinity, solvent casting and twin screw extruder mixing were also compared with batch mixing. The amorphous API in the polymer matrix showed improved apparent solubility as compared to its crystalline state. This confirmed that the state of API in the …
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