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 22 for “"Grafting To"”.
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Synthesis and Grafting To of Biomimetic Bottlebrush Polymers
… molecules contain a surface-adhesive headgroup to anchor macromolecules to a target surface and a bottlebrush polymer that endows the surface with a beneficial property, like antifouling. These glycoproteins can be effectively mimicked using protein-bottlebrush hybrids, but many challenges still …
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Ring-opening Metathesis Polymerization for the Creation of Responsive Colloids and Surfaces
… polymerization method and has been widely used to synthesize various polymer materials. This thesis investigates the use of ROMP in the creation of responsive materials, including photonic polymer colloids and surface-immobilized polymer brushes. In Chapter 1, an introduction is provided to the …
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Preparation of Fully Miscible Nanocomposites
… robust and up-scalable synthetic route to small, spherical, well stabilized, narrow disperse, crystalline ZnO nanoparticles. The synthesis utilizes Zn-oleate or Zn-stearate as precursors, which are hydrolyzed in polar organic solvents to obtain ZnO nanoparticles in diameters in the range …
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Immobilization of Inorganic Nanoparticles on Responsive Polymer Brushes
… and controlled immobilization of metal/semiconductor nanoparticles on macroscopic surfaces has been demonstrated. The employed approach offers the possibility of the organization of a variety of inorganic nanoparticles by irreversible bonding and homogenous distribution on an underlying substrate. …
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Regioselective Design of Polysaccharide Ester Graft Copolymers
… as blend compatibilizers, sustainable elastomers, self-assembling materials, and drug delivery components. This popularity is attributed to the inherent renewability, abundance, and general low toxicity of the polysaccharide backbone, coupled with the extensive functionality and range of …
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Investigation of Copper Wire-Mediated Controlled/Living Radical Polymerization
… radical polymerization (CLRP) is a powerful tool that provides numerous opportunities for the development of new materials. It requires low catalyst loading and mild reaction conditions, but does involve use of organic solvents. There is a need for greener solvent systems to replace …
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Funktionalisierung von Silikonoberflächen
… Verwendung findet. Ein limitierender Faktor für den Einsatz von PDMS ist aufgrund des Fehlens von reaktiven Gruppen und der niedrigen freien Oberflächenenergie seine geringe Adhäsion zu anderen Materialien. Zur Erhöhung der Adhäsion ist deshalb die Einführung von polaren, funktionellen …
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Triplet-Triplet Annihilation Upconversion in Solid-State Organic-Inorganic Ureasil Polymer Hosts
… attracted significant attention as an approach to harvest low energy solar photons that cannot be captured by conventional photovoltaic devices. However, device integration requires the design of solid-state TTA-UC materials that combine high upconversion efficiency with long-term stability. …
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Development of polyHIPE scaffolds for improved bone regeneration
… resulting from trauma or disease are challenging to treat due to the size and shape of the defect. Autologous tissue remains the gold standard due to the superior healing potential but harvesting material is challenging due to donor site complications. We have designed a synthetic scaffold system …
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Wechselwirkung von dünnen Schichten aus HVZ Polyestern im wässrigen Medium mit Modellproteinen
… of properties of the initial (raw) HBPs to their applications. Each research step is given in a separate chapter to enhance attention to various aspects of the aim of the work. Thus, every chapter is started with an introduction. After that, the methods applied and experimental procedure …
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Fabrication and Study of Switchable Polymer Layers with Hydrophobic/Hydrophilic Behavior
The framework of this thesis aims to fabricate materials, which change surface characteristics in response to environmental conditions. This response may be employed to improve material characteristics as adhesion, wettability, interaction with cells etc. The mixed brushes introduce adaptive and …
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Generation of cells for cell-replacement therapy: Specification of neural precursors in vivo and in neural stem cell cultures
… therapy of neurodegenerative disorders aims to substitute the degenerating cells with new functional neurons. Clinical trails with patients suffering from Parkinson’s or Huntington’s disease have generated proof-of-principle results that neural precursors taken from the developing human brain …
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Tailoring of the biomechanics of tissue-regenerative vascular scaffolds
… available on the market has directed research towards improving the performance of these grafts. Improved radial compliance matching and appropriate tissue ingrowth into the graft structure are main goals for an ideal vascular graft. In addition, the use of biodegradable materials offers the …
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Synthesis of Bottlebrush Polymers Using the Grafting-Through and Transfer-To Methods
Bottlebrush polymers are interesting topologies that have become increasingly relevant in various applications including rheology modifiers, super-soft elastomers, photonic crystals, anti-fouling coatings, the in vivo delivery of therapeutic agents, and as promising substrates in lithographic …
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Silica Polypeptide-Based Colloids: Physical Properties and Novel Materials
… PCPs were prepared by both growing form and grafting to method. They consist of a core made of silica, silica-coated magnetite or silica-coated cobalt. Some of the particles were covalently labeled with fluorescein isothiocyanate. Several polypeptides were chosen for attachment on the core: …
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Surgical ventricular reconstruction for ischemic or idiopathic dilated cardiomyopathy
… Any disturbance of the functional cardiac anatomy will impair ventricular function and cardiac output. It has been postulated that the Dor surgical ventricular reconstruction procedure for patients with ventricular dysfunction after an infarction for either left ventricular akinesia or …
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Preserved extracellular matrix in non-enzymatically detached cultured keratinocyte sheets bolsters the healing effects on grafted burn wounds
After escharotomy, full thickness large burn wounds are temporarily covered with cadaver skin because of the limited availability of autologous skin. However, cadaver skin is eventually rejected still requiring autologous skin grafting. To overcome this obstacle, cultured autologous keratinocyte …
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Quantum chemistry and surface hopping dynamics of azobenzenes
This cumulative doctoral dissertation, based on three publications, is devoted to the investigation of several aspects of azobenzene molecular switches, with the aid of computational chemistry. In the first paper, the isomerization rates of a thermal cis → trans isomerization of azobenzenes for …
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Nanocomposite catalysts for soot combustion and propane steam reforming
… CuO-Ag/CeO 2, has been successfully developed to complete carbon black combustion by 400*C. This novel catalyst has excellent potential for application in the emission control of soot particulates generated by diesel engines. In this work, CuO was coated onto nanocrystalline supports, such as …
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Click Chemistry as Efficient Ligation Strategy for Complex Macromolecular Architecture and Surface Engineering
… der kupferkatalysierten Huisgen [2+3] Cycloadditons Click-Reaktion synthetisiert. Ein Azido-funktionalisiertes Dithiobenzoat Click-RAFT-Agens wurde als Kettenüberträger in der RAFT Polymerisation von Styrol verwendet, die in niedermolekularen azido-terminierten Polymeren resultierte. Der …
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