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Showing 1 to 20 of 21 for “"Polyelectrolyte Complexes"”.
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Polyelectrolyte Complexes and their Therapeutic Potential
This thesis describes the preparation of polyelectrolyte nanostructures, the characterization of interpolyelectrolyte complexes (IPECs) made from these structures and their use in a therapeutic context. The therapeutic use of such IPECs connects the two major topics of this work: First, the …
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Polyelectrolyte complexes embedding reduced graphite oxide
L'abstract è presente nell'allegato / the abstract is in the attachment
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Novel polyelectrolyte complexes for oral insulin delivery.
… and hydrophilicity. Nano-sized polymer-protein polyelectrolyte complexes (PECS) formed by electrostatic interactions between insulin and Polyallylamine-based polymers at pH 7.4 have been adapted to facilitate oral insulin delivery. Polyallylamine (15kDa) was quaternised by methylation of its …
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The dielectric properties of non-stoichiometric polyelectrolyte complexes.
Massachusetts Institute of Technology. Dept. of Chemical Engineering. Thesis. 1965. Mat.Eng.
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A study of polyelectrolyte complexes with dynamic light scattering
Polyelectrolyte complexes (PEC) are a novel class of copolymers formed from the reaction between polyanions and polycations (PE's) in polar solvents.
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Production and Characterisation of Self-Crosslinked Chitosan-Carrageenan Polyelectrolyte Complexes
… toxicity in the body. Oppositely-charged polyelectrolytes (PEs) have the advantage that they can self-crosslink electrostatically and those derived from marine organisms are an inexpensive alternative to glycosaminoglycans present in the extracellular matrix of human tissues. A range of …
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Dispersed and deposited polyelectrolyte complexes and their interactions to chiral compounds and proteins
Polyelectrolyte complexation is a rapidly growing field with applications in functional multilayer (PEM) and nanoparticle (PEC) generation, where PEM films are deposited using Layer-by-Layer technique initiated by Decher and PECs are prepared using mixing-centrifugation technique initiated by our …
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Controlling antibody delivery, mechanical properties, and cell response of alginate-chitosan polyelectrolyte complexes
… readily form ionic bonds in solution to form a polyelectrolyte complex (PEC). It was demonstrated that the release rate of non-specific IgG antibody could be tailored by altering the ratio of alginate to chitosan or the concentration of CaSO4 in the PEC, with the 50:50 alginate-chitosan PEC …
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Stability Constants of Metal-Polyelectrolyte Complexes Occurring Naturally in Soils and Sewage Sludge
Made available in DSpace on 2014-12-12T00:17:44Z (GMT). No. of bitstreams: 1 7121236.pdf: 3548314 bytes, checksum: b786ff2e0a3a55947627400cf90c48f6 (MD5) Previous issue date: 1971
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Increasing Sustainability of the Papermaking Process via Formulation of Cellulose Nanofibers and Polyelectrolyte Complexes
… percent solids with the use of CNFs and polyelectrolyte complexes (PECs). By increasing the percent solids of the wet paper web that enters the evaporative dryer, the sustainability and energy efficiency of the paper-making process can be improved. Going through the thesis we explore …
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Polyelectrolyte complexes as building blocks for gas barrier coatings and fire-safe lightweight materials
L'abstract è presente nell'allegato / the abstract is in the attachment
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Increased Utility of pH Sensitive Indicators as High Concentration CO2 Detectors Through the Use of Polyelectrolyte Complexes as Stabilizing Media
… Plastics made from large molecules known as polyelectrolytes can form complexes which may serve as inexpensive and multipurpose mediums for encapsulation of pH sensitive indicators. This research aims to combine the properties of both pH indicators and polyelectrolyte complexes (PECs) to form …
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Modular Nanoparticles for Selective Cell Targeting
… for selective cell targeting. Specifically, polyelectrolyte complexes composed of heparin (Hep, a growth factor binding glycosaminoglycan) and poly-L-lysine (PLL, a homopolymeric lysine) were prepared via a pulse sonication method. The Hep/PLL core NPs were further layered with additional …
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A novel polyelectrolyte complex between amphiphilic poly (allyl amine) and sodium alginate.
Polyelectrolytes are charge-carrying polymers. When two oppositely-charged polyelectrolytes are combined in a solution favouring charge expression, a polyelectrolyte complex can result. These complexes have been shown to be useful in the field of drug delivery in general. Amphiphilic …
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Chitosan-Cellulose Nanocrystal Polyelectrolyte Complex Particles: Preparation, Characterization, and In Vitro Drug Release Properties
Polyelectrolyte complexes (PECs) between chitosan, a mucoadhesive, intestinal mucosal permeability-enhancing polysaccharide, and cellulose nanocrystals, rod-like cellulose nanoparticles with sulfate groups on their surface, have potential applications in oral drug delivery. The purpose of this …
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Characterization of Coacervate Systems Using Redox Sensitive Dyes
… spontaneously form when two oppositely charged polyelectrolytes are mixed in a concentrated salt solution. When coacervates form, a biphasic equilibrium occurs in the sample with two phases present in the solution. The two phases are described as the dense phase and the lean phase, named after …
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Colloidal and Polyelectrolyte Inks for Direct -Write Assembly of 3D Periodic Structures
… colloidal ink (feature size > 100 mum) and (2) a polyelectrolyte ink (feature size ∼ 1 mum). The rheological properties of both inks were specifically tailored for our direct-write assembly process, which involves ink deposition through a fine scale nozzle that is robotically controlled using …
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Development of Core-Shell Polymeric Nanostructures for Delivery of Diagnostic and Chemotherapeutic Agents
Macromolecular complexes of anionic-nonionic block copolymers and cationic antibiotic aminoglycosides have been formed by electrostatic condensation. Amphiphilicity of the complexes was introduced into the shells by incorporating a hydrophobic poly(propylene oxide) segment into the block copolymer. …
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Functional Cylindrical Polymer Brushes and Their Hybrids with Inorganic Nanoparticles
… to the macro-initiator by ATRP yielded weak polyelectrolyte cylindrical brushes. They showed responsiveness to pH and salinity in solution. Strong cationic polyelectrolyte brushes were obtained by further quaternization of the PDMAEMA brushes. Their responses to counterions of different …
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Multifunctional bioreducible nanoparticles for gene therapy
… major challenges. Bioreducible polyplexes (polyelectrolyte complexes of disulfide-containing polycations and nucleic acids) utilize the redox potential gradient existing between extracellular space and intracellular environment as a physiological stimulus to enhance delivery of therapeutic …
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