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.
Results
Showing 1 to 20 of 35 for “"deep eutectic solvents"”.
-
Synthesis of nanostructured materials in deep eutectic solvents
Deep eutectic solvents (DES), a new generation of non-toxic, eco-friendly and biodegradable solvents discovered in 2001 consist of a variety of cations and anions. These new sub-category of ionic liquids present interesting properties due to the hydrogen bonding between their components and are …
-
Multi-techniques Characterization of Mechanochemically Synthesized Deep Eutectic Solvents
<p>Deep eutectic solvent (DES) is the alternative and greener solvent in which two compounds, usually a hydrogen bond acceptor (HBA) and a hydrogen bond donor (HBD), are used. Two components form a complex network with strong intermolecular forces and show a lower melting point than those of the …
-
Ionothermal Synthesis of High Silica Zeolites in Deep Eutectic Solvents (DES)
… zeolites have been synthesized using different deep eutectic solvents for the first time. ZSM-5 was made in tetrapropylammonium bromide/pentaerythritol. The reaction is affected by the amounts of seeding, water content, and organic structure-directing agent (SDA). Sodalite and ZSM-39 were …
-
Deep Eutectic Solvents for the Leaching of Cobalt from Oxide Ores
… this, this thesis examines the application of deep eutectic solvents (DESs) as a new approach for the extraction of Co from its ores. The work focussed on two ‘world-class’ Co-bearing ores types: a SSH Cu ore and a Ni(Co) laterite ore. Analysis using XRD, QEMSCAN®, and EPMA shows that a …
-
Effect of water on copper electrodeposition from water-containing deep eutectic solvents
… for this process. Amongst a variety of ILs, deep eutectic solvents (DESs) formulated from choline chloride and hydrogen bond donors have exhibited the most promising characteristics to be exploitable at large scale. Some of these characteristics are the tolerance to water, low volatility and …
-
Deep Eutectic Solvents Synthesis, Characterization and Applications in Pretreatment of Lignocellulosic Biomass
<p>There has been an increased interest in green solvents and biofuels with the growing environmental awareness across the globe. Conventional methods of biofuel production involve the use of large quantities of molecular solvents and ionic liquids (ILs), but they have the drawbacks of high vapor …
-
Environmentally friendly baths for Cu-Sn co-electrodeposition: cyanide-free aqueous bath and deep eutectic solvents
… preparation of copper-tin alloys from green solvents for decorative purposes. Actual industrial process involves cyanide based complex bath in order to produce white bronze layers and they often contain lead as brightener and whitener. The aim of the thesis is to develop a more environmental …
-
Infinite dilution activity coefficient measurements of organic solutes in selected deep eutectic solvents by gas-liquid chromatography
Submitted in fulfillment of the academic requirements for the degree of Master of Engineering: Chemical Engineering, Durban University of Technology, Durban, South Africa, 2018.
-
Development Of Novel Deep Eutectic Solvents For Optimization And Characterization, Involving Bio Extraction And Delivery Of Drugs With Poor Solubility
… had shown increased solubility in these solvents. DES solvents as extractant had shown increased extraction efficiency and had bypassed the limitations of organic extracts to be applied in cosmetic and pharmaceutical industry as they are safe to use, nonvolatile and stable. Overall, by …
-
Dry milling characteristics and polyphenolic contents of adapted colored corn varieties and polyphenol extraction by combining deep eutectic solvents and ultrasound
… from plant matrices using a wide array of solvents. However, conventional extraction methods involve the use of organic solvents, which are of concern due to their adverse environmental impacts and generation of waste streams. Therefore, there is a growing demand for green solvents that are …
-
EXPLORING NOVEL SUSTAINABLE SYNTHETIC METHODOLOGIES WITH NITRO COMPOUNDS
… reduction of β,β-disubstituted nitroalkenes in deep eutectic solvents, the preliminary investigation of other enantioselective nitroalkenes reductions catalyzed by chiral organocatalysts and the study of mechanically interlocked molecules as organocatalysts in acylation reactions. In particular, …
-
Phase behaviour of multicomponent systems from computer simulations
… of different biomolecular solutions and deep eutectic solvents, each having their own distinct characteristics and complexities. Firstly, we explore the process of biomolecular phase separation to form multicomponent biomolecular condensates, which are ubiquitous in cells and are crucial …
-
Non-Covalent Interactions in Polymeric Materials: From Ionomers to Polymer Blends
… as compared to sulfonated PET-containing blends. Deep eutectic solvents (DES) have been reported to be the next generation solvents due to the superior biocompatibility, biodegradability, and sustainability as compared to ionic liquids. Two types of deep eutectic solvents, choline chloride : malic …
-
Harnessing <i>Haloferax mediterranei</i> for Bioplastic Production from Organic Waste
… was experimentally evaluated using hydrophobic deep eutectic solvents with omniphobic membranes, and kinetic-affinity relationships guided the separation design. To bypass VFA purification needs, in-situ VFAs produced from arrested anaerobic digestion (aAD) were also tested, showing that H. …
Page 1 of 2