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 19 of 19 for “"Gelator"”.
-
Synthesis and Characterization of Sugar Derivatives as Functional Gelators
… assemblages of organic molecules known as organogelators and hydrogelators are currently, and only recently, a subject of great attention and promise. In this context, low molecular weight gelators (LMWGs) are of particular interest because they provide a bottom-up approach to the formation of …
-
Flüssigkristalline supramolekulare Systeme
… hat sich als hervorragender Gelator für organische Flüssigkeiten erwiesen, und wurde bisher noch nicht in der Literatur beschrieben. Besonders feste und klare Gele wurden aus Toluol, Xylol und Decalin erhalten, wobei bezogen auf ein Molekül Gelator mehr als 5900 Moleküle …
-
Analytical Studies Concerning the Stability of Betamethasone Valerate and Fusidic acid Hemihydrate in Topical Pharmaceutical Preparations
… of addition of the novel low molecular weight gelator, Fmoc-OH-C18, on the manufacture of the microfibers as well as on their in-vitro drug release rates was studied. The gelator was found to have a profound effect on the morphology of the resulting fibers but had little effect on the release …
-
Directing the self-assembly of short peptide derivatives
… release protease enzyme thermolysin into a pre-gelator (Fmoc-T and F-NH2) solution for bulk gelation as well as to irreversibly immobilize the enzyme for localizing the self-assembly to the surface. Enzyme-(magnetic)nanoparticle conjugates were employed to trigger the self-assembly and gelation …
-
Supramolecular hydrogels based on 1,3,5‐benzene tricarboxamides
… concentration (cgc) of 2 g L 1. Even at this low gelator concentrations the gels are thermally stable up to the boiling point of water. They are also stable in various organic solvents and by a solvent exchange the hydrogels can be transferred to stable organogels. The gel formation process is …
-
The principles of molecular gel formation
… mechanical properties. Low molecular weight gelators based on aromatic short peptide derivatives have been shown to self-assemble into fibrous networks featuring highly ordered molecular packing. The building units of these structures are individual molecules experiencing hydrogen bonding and …
-
Glucose and Glucosamine Derivatives as Novel Low Molecular Weight Gelators
Low molecular weight gelators (LMWGs) are small molecules that are capable of entrapping solvents to form a gel in organic solvents or aqueous solution. These compounds rely solely on noncovalent forces to form the fibrous networks necessary to entrap a variety of solvents. The organogels and …
-
Synthesis, Characterization, and Properties of Tailored Functional Block Copolymers
… triblock copolymers and their application as BCP gelators for the low molecular weight liquid crystal (LC) 4-cyano-4’-(pentyl)biphenyl (5CB). Based on the selective solubility of the A and B blocks in the nematic solvent, ABA triblock copolymers can be used for the thermoreversible gelation of …
-
Sugar-Derived Oleogels in Cosmetics and Food Applications: a Case Study of Trehalose- and Mannitol-Based Gelators
… have been shown to act as low molecular weight gelators (LMWGs) and are becoming the main focus of several research groups. Their ability to self-assemble into various morphologies from micelles to bilayer sheets, and remain stable due to noncovalent forces responsible for the formation of the …
-
The Synthesis and Characterisation of Novel Low Molecular Weight Gelators and their Applications in Electrospinning to Develop Biocompatible Materials and Tissue Scaffolds
… capable of acting as Low Molecular Weight Gelators (LMGWs). This class of compounds form self-assembled fibrous networks which entrap the solvent and form gels. These materials have received considerable attention in recent years due to a variety of applications that range from …
-
Thermo-Reversible Gelation Of Rod-Coil and Coil-Rod-Coil Molecules Based on Perylene Diimides
… polymers during their self-assembly. With the gelators used, chain entanglement and network formation trap the solvent causing gelation. Hence, forces such as hydrogen bonding are not a requirement. We first describe the thermo-reversible gelation of PDMS via the physical route, without any …
-
Nanostructured polymers: morphology and properties
… and the space charge at low concentration of the gelator was found to improve the space charge distribution. The same polyethylene blend has then been studied also upon addition of relatively polar ethylene/ vinyl acetate copolymers (EVA), with a VA content varying from 9 % to 40 %. Morphology …
-
Biofunctionalised Coordination Cages and Quantified Speciation in Supramolecular Mixtures
… of single amino acids and a tripeptide gelator onto coordination cages were investigated, showing that the properties of the peptide such as chirality and gelation were transferred to the whole system. Addition of a photoacid generator to the organo-gel formed triggered the reversible …
-
Transport und Strukturbildung in magnetischen Hybriden
… be- stehend aus jeweils einem thermoreversiblen Gelator und einem Fer- rofluid verwendet. Eine basiert auf Paraffinöl mit Magnetit-Partikeln (FGSEPS) und eine auf Wasser mit Kobaltferrit-Partikeln (FGP123). Bei der Vernetzung der Fluidoberfläche kommt ein esterbasiertes Fer- rofluid und ein …
-
Dynamic supramolecular hydrogels with adaptive biological functionality
… of biocatalytic self-assembly and surfactant/gelator co-assembly. This is achieved by enzymatically triggered reconfiguration of free flowing micellar aggregates of pre-gelators and functional surfactants to form nanofibers that incorporate and display the surfactants' functionality at the …
-
Surface Deformations of Magnetic Continua in Homogeneous Fields
… nanoparticles in a carrier liquid. By adding a gelator, such a ferrofluid can be turned into a ferrogel. The magnetic properties of these substances are similar to a usual paramagnet with the important difference, that the susceptibility of the former is higher by a factor of 10^3 to 10^6. By …
-
Synthesis and characterization of sugar based low molecular weight gelators
<p>Low molecular weight gelators (LMWGs) have gained great attention over the past two decades. These compounds form self-assembled fibrous networks like micelles, cylindrical, sheets, fibers, layers and so on. The fibrous network entraps the solvent and form gel. LMWGs are interesting compounds …
-
Synthesis of Higher Molecular Weight Poly(D-glucaramides) and Poly(aldaramides) as Novel Gel Forming Agents
<p>Poly(alkylene D-glucaramides) with higher molecular weights than previously reported were prepared through a multi-step process beginning with 1:1 alkylenediammonium D-glucarate salts. These salts set a precise stoichiometric equivalence between co-monomers, a necessary requirement for higher …
-
Synthesis of Higher Molecular Weight Poly(D-glucaramides) and Poly(aldaramides) as Novel Gel Forming Agents
<p>Poly(alkylene D-glucaramides) with higher molecular weights than previously reported were prepared through a multi-step process beginning with 1:1 alkylenediammonium D-glucarate salts. These salts set a precise stoichiometric equivalence between co-monomers, a necessary requirement for higher …