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Showing 1 to 20 of 33 for “"Cationic and anionic"”.
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New block copolymers of Isobutylene by combination of cationic and anionic polymerizations
… copolymers of isobutylene by combination of cationic and anionic polymerizations, which are new materials with numerous promising potential applications. A new method for the synthesis of tailored polyisobutylene(PIB)-based block copolymer by combination of controlled / living cationic and …
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Spectroscopic studies of hydrophobic association of merocyanine dyes in cationic and anionic micelles
… organic solvents have been extensively studied and correlations between [see PDF file for formula]<sub>max</sub> and solvent polarity have been determined. In this work the visible absorption have been determined. In this work the visible absorption properties of merocyanine dyes were studied in …
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Removal of cationic and anionic dyes from aqueous solution using a clay-based nanocomposite.
Some industries such as textiles, ceramics, paper and printing are known to use significant amounts of dye to colour their products and during the colouring process, certain quantities of dyes are absorbed by the products, and some of them end up in wastewater. Depending on their application, some …
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The Effect of Switchable Additives on Colloidal Interactions Found in Oil Sands
… affect colloidal interactions found in oil sands, in an effort to identify potential candidates for industrial use. Chemical force spectrometry was used to evaluate adhesion forces present in model oil sand systems. Organic/mineral and mineral/mineral interactions were investigated in the …
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Interactions of Inorganic Mercury and Inorganic Cadmium with Biomimetic and Complex Biological Membranes and their Influence on Membrane Packing and Size
Inorganic mercury (Hg2+) and Inorganic Cadmium (Cd2+) are toxic heavy metals linked to the development of cancer, diabetes and neurological dysfunctions. The effect of these metals on the fluidity and phase transition (Tm) of biomimetic and polar extract membranes was investigated using Laurdan …
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Mesoporous Functionalized Materials for Post-Combustion Carbon Dioxide Capture.
… in presence of cationic and anionic surfactants. Reaction media strongly affected gelation time. Thus, in basic media gelation occurred immediately while acid increased gelation time. Material structures were studied by IR spectroscopy, porosimetry, XRD, and SAXS …
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Physicomechanical Response of Ionic Polyurethanes on Endothelial Cells
… engineered by tuning their segmental composition and by regulating inter-segmental interactions. We aim to use ionic PUs as representative vascular graft material to analyze the response of human endothelial cells and correlate it to cell-matrix interactions. We propose to use …
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IDENTIFICATION AND QUANTIFICATION OF IONIC POLLUTANTS IN ENVIRONMENTAL WATER
… analytical methods for the determination of both cationic and anionic pollutants in environmental water. In chapter 2, a DNA-based molecular beacon fluorescent sensor was demonstrated for the detection of a cationic pollutant, namely Hg2+, with tunable detection range. This sensor can easily …
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Understanding and Exploiting Anion Redox Process for High Energy Density Positive Electrode Materials for Li-ion Batteries
… opportunity by providing reasonable cycle life and energy density. It was widely assumed that Li-ion battery positive electrode materials, Li transition metal oxides, store charges through the redox activity of transition metal species, accompanied by the intercalation and deintercalation of …
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Regioselective chlorination of cellulose esters
… been of growing interest, owing to the abundance and processing challenges of natural cellulose. To date, etherification and esterification are the most effective strategies to modify physicochemical properties of cellulose and append new functionalities. However, they typically require relatively …
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A technique for harvesting unicellular algae using colloidal gas aphrons
… to separate from their liquid environment, and at the present time no economical process exists. A novel technique using colloidal gas aphrons (CGA) has been investigated for harvesting <i>Chlorella vulgaris</i>, a green algae, from dilute suspension. CGA dispersions consist of very small …
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Electrolyte Dependence on the Electrochemical and Optoelectronic Activity of a Conjugated Polymer in Organic Solvents
<p>Organic electronic devices rely on the redox and charge transport properties of conjugated polymers. Many high-performance electroactive polymers are hydrophobic and require processing in organic solvents. As such, these materials are characterized in nonaqueous electrolyte systems to evaluate …
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Investigation of layer-by-layer assembly and M13 bacteriophage nanowires for dye-sensitized solar cells
… the ability to enhance the materials interface and improve the control required in development of nanoscale materials. Layer-by-layer (LbL) assembly allows for the incorporation of a wide range of functional materials into structured thin films based on the alternate adsorption of cationic and …
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DEVELOPMENT OF SINGLE-CELL MASS SPECTROMETRY TOOLS TO INVESTIGATE METABOLIC REORGANIZATION DURING EARLY EMBRYOGENESIS
… cells holds the potential to advance our understanding of fundamental biological processes during cell differentiation and development. However, to characterize the metabolic state of single cells, further technological advances are still required. This dissertation discusses the development and …
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Synthesis and characterization of implants for bone substitutions made of biomedical apatites containing silicon
… interest, owing to the increasing economic and societal impact of the bone diseases. In the present work of research the development of bone substitutes characterized by improved biomimetism, has been faced in a chemical, structural and morphological perspective. From a chemical point of …
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The preparation and characterisation of mixed-anion and non-oxide materials
… has focused largely on the chemistry of oxides and on chemical tailoring of the structure and physical properties via cationic substitutions. Consequentially, the chemistry of non-oxide ompounds and other means of chemical tailoring, such as anionic substitutions, have been comparatively …
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Modification of clays with ionic liquids for polymer nanocomponents
… enhanced compatibility with a polymer matrix, cationic and anionic clays susceptible to exchange of their interlamellar ions with a variety of other cations or anions, were selected. In order to treat cationic clay, montmorillonite, which contains sodium ions as interlayer ions, reagents having …
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Coordination Cages for the Separation and Transportation of Molecular Cargo
… the fundamental concepts governing the design and synthesis of supramolecular complexes. By illustrating the synthesis of several coordination cages reported in the literature, the principles underlying the construction of coordination cages by subcomponent self-assembly are elucidated. Ionic …
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Development and characterization of conducting polymer actuators
… polymers such as polypyrrole, polythiophene and polyaniline are currently studied as novel biologically inspired actuators. The actuation mechanism of these materials depends upon the motion of ions in and out of the polymer film during electrochemical cycling. The diffusion of ions into the …
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Synthesis and Characterization of Cationic Spherical Polyelectrolyte Brushes
In this thesis, the preparation of cationic spherical polyelectrolyte brushes by photo-emulsion polymerization has been presented for the first time. The structure and properties of the cationic SPB, have been comprehensively investigated by dynamic light scattering and atomic force microscopy, and …
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