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 75 for “"Solvent-free"”.
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Solvent-free Knoevenagel condensation over supported mixed metal oxides catalysts
Submitted in the fulfilment of the requirement for the Master's Degree in Chemistry, Durban University of Technology, Durban, South Africa, 2017.
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Solvent-free additive manufacturing of electrodes for Li-ion batteries
… battery electrode manufacturing process using a solvent free additive manufacturing method has been developed. Li-ion battery electrodes consist of active material particles, a binder additive, and a conductive additive. Traditionally, Li-ion battery electrodes are manufacturing using the "slurry …
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Rheological characteristics of solvent free nanofluids: Thermal transitions and reactive curing
<p>Solvent-free nanofluids are a new and exciting class of material that evolved to address the limitations of their predecessors, nanocomposites. One of the most exciting aspects of solvent-free nanofluids is the wide range of tools chemists have to build and study them. Understanding how the …
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Solvent Free Technologies for Polymer based Crystal Engineering and Drug Delivery
… process in terms of residence time, plasticiser free dispersions, effect of process on degradation of drugs during processing. For this purpose, the process and material modifications during operation of these two technologies was important aspects of this study. The pharmaceutical drugs chosen …
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Development of Molecular Glasses for Solvent-Free Photolithography utilizing Combinatorial Vapor Deposition
This thesis is concerned with solvent-free film preparation of low molecular weight, amorphous, photosensitive resists by physical vapor deposition (PVD), their subsequent UV exposure through a mask and their development to produce features in the micro- and nanometer range. In the frame of the …
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Towards Solid-State Hybrid Polymer Electrolytes by Innovative, Rapid, and Solvent-Free Procedures
L'abstract è presente nell'allegato / the abstract is in the attachment
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A novel solvent-free high shear technology for the preparation of pharmaceutical cocrystals
… In this project, it was used as a novel solvent-free method for the preparation of cocrystals. Cocrystals produced by HSMG were compared to those prepared by Hot Melt Extrusion (HME) to investigate the influence of variable parameters and conditions on the process of cocrystal conversion. …
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Sustainable biomedical practices in designing and testing new therapies through solvent free drug nanoencapsulation and tissue models
L'abstract è presente nell'allegato / the abstract is in the attachment
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Investigation of a solvent-free continuous process to produce pharmaceutical co-crystals. Understanding and developing solvent-free continuous cocrystallisation (SFCC) through study of co-crystal formation under the application of heat, model shear and twin screw extrusion, including development of a near infrared spectroscopy partial least squares quantification method
This project utilised a novel solvent-free continuous cocrystallisation (SFCC) method to manufacture pharmaceutical co-crystals. The objectives were to optimize the process towards achieving high co-crystal yields and to understand the behaviour of co-crystals under different conditions. Particular …
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Ultrasound Assisted Processing of Solid State Pharmaceuticals. The application of ultrasonic energy in novel solid state pharmaceutical applications, including solvent free co-crystallisation (SFCC) and enhanced compressibility
… advantages over conventional methods. A novel, solvent-free, high-power ultrasound (US) technique, for preparing co-crystals from binary systems, was chosen as the technology which could fulfil these aims. The application of this technology for solid state co-crystal preparation was explored for …
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Sustainable Mechanochemical Synthesis and Manufacturing of Metal-Organic Frameworks for Enhanced Hydrogen Storage
… through green mechanochemical synthesis, solvent-free mechanochemical modification, and scalable cold-sintering-enabled monolithic moulding technology. The design of Experiments (DoE) methodology was applied to systematically optimise the mechanochemical synthesis of CuBTC, enabling …
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Development Of Inlet And Vacuum Ionization Methods For Characterization Of Biological Materials By Mass Spectrometry
… matrix assisted ionization inlet, MAII; and solvent assisted ionization inlet, SAII), small (e.g. drugs) to large (e.g. proteins) non-volatile molecules are ionized with the assistance of heat and pressure drop, and are operated from AP. The ease of operation, rapidness of data acquisition, …
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The design and construction of a liquid-liquid solvent extractor with reflux
… distillation. The selective action of a solvent, which is relatively non-volatile compared to the components of a mixture to be separated, is utilized. The solvent and extract are then separated by distillation, and part of the extract is recycled as reflux. A spiral-packed column for use …
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Developing Core-Shell Borohydride Nanoarchitectures and Understanding their Structure-Hydrogen Release/Uptake Relationships
… of size and shape-controlled borohydrides as freestanding core-shell structures has surfaced as an appealing approach to enable H2 release/uptake at low temperatures. Through this technique, it is hypothesised that the shell would limit the loss of active species (e.g. boron), …
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Azomethine-Containing Moieties for Simple and Degradable Conjugated Polymers
… dihydro[3,2-b]pyrrolopyrrole (DHPPs), as well as solvent-free mechanochemistry to synthesize dibrominated monomers amenable to robust Suzuki polycondensations. Monomer preparation through mechanochemistry has the added benefit of reducing the need for non-renewable and energy-intensive solvents as …
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Synthesis and characterization of diverse copper halide complexes with a range of heterocyclic ligands
… and pyrazine. Complex synthesis occurred via solvent-mediated routes using the Schlenk technique and solvent-free reactions with mechanical grinding. Comprehensive characterization involved techniques such as melting point determination, solubility tests, luminescence spectroscopy, FT-IR, TGA, …
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The Phase Behavior of Heavy Oil and Propane Mixtures
… of the heavy phase was also measured. Solvent-free pitch yields as high as 70 wt% of the bitumen were observed. Pseudo-ternary diagrams were also constructed to observe the partitioning of the species between the phases. Finally, the ability of a cubic equation-of-state with two forms …
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Novel formulations of a poorly soluble drug using the extrusion process.
… solid state polymorphic transformation. HME is a solvent free, continuous and readily scalable technique which is increasingly being considered as a viable alternative to conventionally used batch techniques. However, the high temperature and shear forces imparted by the extrusion process can …
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