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 20 for “"Thermally-responsive"”.
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Bioadhesion to model thermally responsive surfaces
… The mixed SAM surface was confirmed to be thermally responsive by contact angle goniometry, 35° at 28 °C and 55° at 40 °C. In addition, the mixed SAM surfaces were confirmed to be thermally responsive for various aqueous mediums by tensiometry. Factors such as oxygen, age, and surface mole …
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Thermally responsive polymers and their applications
… phase-separates from water upon heating. The thermally responsive properties and applications of polyNIPA are introduced in Chapter One. In Chapter Two, we described the synthesis of polyNIPA gels with an imidazole comomoer and examined copper ion adsorption by the swollen (room temperature) …
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Thermally-responsive interpenetrating polymer network nanoparticles as intelligent therapeutic systems
Thermally-responsive interpenetrating polymer network (IPN) nanoparticles, composed of polyacrylamide, poly(acrylic acid), poly(methacrylic acid), poly(2-ethylacrylic acid), and poly(2-propylacrylic acid), were synthesized using a sequential inverse emulsion polymerization technique. These …
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Thermally Responsive Peptide Coated Superparamagnetic Iron Oxide Nanoparticles for Drug Delivery
… such as drug carriers and hyperthermia. Thermally responsive core-shell materials with tubular and spherical morphologies without compromising the inner cores properties such as superparamagnetism is highly desirable. Two shapes of iron oxide (spherical and tubular) were prepared using …
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Synthesis and Characterization of Thermally Responsive Nanocapsules Surface Decorated With Folic Acid For Targeted Drug Delivery and Cancer Destruction
… in serum). The surface-modified nanocapsules are thermally responsive in size, which enables encapsulation of Doxorubicin (Dox) at room temperature (when the size of the nanocapsules is approximately 220-450 nm dependent on the surface-modification) and delivery to cancer cells at 37 oC (when the …
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Mechanics of amorphous polymers and polymer gels
… polymers form a relatively new class of thermallyactuated shape-memory polymers. Several biomedical applications for thermally-actuated shape-memory polymers have been proposed/demonstrated in the recent literature. However, actual use of such polymers and devices made from these …
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Poly(NIPAAm-co-AAm)-gold nanoshell composites for optically-triggered cancer therapeutic delivery
… platform using two novel material components: a thermally responsive poly[N-isopropylacrylamide-co-acrylamide] (NIPAAm-co-AAm) hydrogel and gold-silica nanoshells. Thermally responsive hydrogels undergo a physical property transition at their lower critical solution temperature (LCST). When …
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Cardiovascular Diseases Factors in Women Enrolled in the Wisewoman Program
… received intervention.</p> <p>At the nano scale, thermally responsive Pluronic F127 based nanocapsules using chitosan as the crosslinker were synthesized. The Pluronic F127-chitosan nanocapsules were found to have excellent biocompatibility, presumably due to the biocompatible nature of the two …
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Synthesis and characterization of tethered poly(n-isopropylacrylamide) for quantitative cell adhesion studies
Environmentally responsive (or smart') polymers represent a new approach for controlling biofouling release. Poly(N-isopropylacrylamide) (PNIPAAm) is a thermo responsive polymer that can potentially be used to control biofouling, as it exhibits a change in its relative hydrophobicity above and …
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Understanding of Molecular Interactions and Reversibility in Silylamines
… Silylamines, in particular, are a class of thermally responsive RevILs that are conducting in its ionic liquid (RevIL) state and non-conducting in its molecular liquid (ML) state. Thus, silylamines could serve as model compounds for the thermally switchable battery electrolyte concept. …
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An Investigation of Poly(N-Isopropylacrylamide) for Applications with Microfluidic Paper-Based Analytical Devices
… point-of-care diagnostic assays. P(NIPAM) is a thermally responsive polymer that absorbs aqueous solutions at room temperature and will expel the solutions to microPADs when heated. The fluid delivery characteristics of P(NIPAM) were assessed, and P(NIPAM) was able to deliver multiple solutions …
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Polymer hydrogel nanoparticles and their networks
The thermally responsive hydroxypropyl cellulose (HPC) hydrogel nanoparticles have been synthesized and characterized. The HPC particles were obtained by chemically crosslinking collapsed HPC polymer chains in water-surfactant (dodecyltrimethylammonium bromide) dispersion above the lower critical …
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Novel Plasmonic Nanostructures for Applications in Sensing, Imaging, and Controlled Release
… was based on nanocages covered with smart, thermally-responsive polymers, and the second was based on nanocages filled with a biocompatible phase-change material. The released dosage could be remotely controlled by manipulating the power of HIFU and/or the duration of exposure. Localization …
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Investigating the air and liquid porosity of sea ice
… and representative analysis of sea ice's thermally responsive properties. In this study, non-destructive X-ray computer tomography (CT) analysis was used to investigate the brine and air inclusions within pancake ice from the Antarctic MIZ during winter 2019 and 2022 expeditions. Sampling …
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Understanding Elastin-Like Polypeptide Block Copolymer Self-assembly Behavior
<p>Elastin-like polypeptides (ELPs) are thermally responsive polymers composed of the pentapeptide repeat Valine-Proline-Glycine-X-Glycine where X is any amino acid except proline. ELP diblocks have been engineered by creating two ELP blocks with hydrophilic and hydrophobic guest residues. The …
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Assembly of Highly Asymmetric Genetically-Encoded Amphiphiles for Thermally Targeted Delivery of Therapeutics
… CPs consist of two principal components: (1) a thermally responsive elastin-like polypeptide (ELP) that displays a soluble-to-aggregate phase transition above a characteristic transition temperature (Tt); and (2) a cysteine-rich peptide fused to one end of the ELP to which small molecule …
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Design, fabrication, and application of stimuli-responsive hydrogel actuators
In this thesis, the topics around stimuli-responsive hydrogel actuators were discussed. In each project, a specially designed, stimuli-responsive, hydrogel was fabricated. By initiating a corresponding stimuli, swell-deswell changes were triggered within the hydrogels, and certain mechanical …
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Synthesis and Structure-Property Relationships of Polysaccharide-Based Block Copolymers and Hydrogels
… Dextran-b-poly(N-isopropylacrylamide) exhibits thermally-induced micellization as revealed by dynamic light scattering, forming micelles with 155 nm diameter at 40 °C. Dextran-b-polystyrene film was analyzed by small angle X-ray scattering, suggesting the existence of microphase separation. This …
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Bioorthogonal Functionalization of Elastin-like Polypeptides
… biopolymer, elastin-like polypeptide (ELP). This thermally responsive biopolymer is easily recombinantly synthesized, though more biochemically complex ELPs require successful bioorthogonal modification. We designed the unnatural amino acid-containing ELPs necessary to enable our strategies for …
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Structure, rheology and applications of thermally-gelling nanoemulsions
… novel nanoemulsion dispersions whose gelation is responsive to temperature. Armed with a molecular-scale understanding of the thermally-gelling nanoemulsion system, we design a gelling platform that can accommodate a wide range of colloidal formulations and gelling nanoemulsions that are …