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 16 of 16 for “"stimuli-responsive polymer"”.
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Stimuli-responsive polymer nanotube arrays
… than their bulk counterparts. However, the stimuli-responsiveness of nanotube arrays has seldom been explored, mostly due to the inertness of the materials typically utilized to create them. Here I introduce a new concept of designing and synthesizing surface-bound stimuli-responsive polymer …
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Stimuli responsive polymer gels for sensing applications
… imparted on it by an IL. The IL simplified polymer gel is termed an optode within this chapter as (a) it is prepared the same manner as optodes, (b) the IL performs many of the same functions as previous materials used in optode design and (c) the analyte or ion movement between the aqueous …
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Stimuli-Responsive Polymer Systems that Respond to Redox Potential and pH for Controlled Drug Release
… and material composition. Furthermore, they have stimuli-responsive moieties that translate physiological signals, such as pH and redox potential, at the tumor microenvironment into nanocarrier behaviors, like swelling, degradation, morphological change, and charge reversal. Stimuli-responsive …
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Synthesis of reactive and stimuli-responsive polymer thin films by initiated chemical vapor deposition and their sensor applications
Stimuli-responsive polymer thin films provide the ability to control the interaction of a surface with its environment. Synthetic techniques with fine compositional control are required to engineer specific responses to stimuli. Initiated chemical vapor deposition (iCVD) is a novel vacuum …
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Bimetallic Main-Group Catalysts for the Synthesis of Advanced Biocompatible, Biodegradable, and Sustainable Polymers
… Among these, poly(lactic acid) (PLA) and its copolymers are especially notable for their biodegradability, sustainability, and tunable chemical and physical properties. This dissertation presents a systematic investigation into the synthesis of PLA and its copolymers with ε-caprolactone and …
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Development and Characterization of Reagent Pencils for Microfluidic Paper Based Analytical Devices
… on the molecular weight dependence, polymer chain end functionality, and polymer-graphite ratio was conducted to determine the most desirable parameters in reagent pencil composition. Further, the effects of enzyme stability in the presence of poly(ethylene glycol) (PEG) is …
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Designing Polymer Hydrogels for Extrusion-Based Additive Manufacturing
… of AM technologies and materials chemistry are stimuli-responsive polymers, which change their chemical and physical properties in response to specific environmental cues. Stimuli-responsive polymer hydrogels, in particular, are seeing significant interest in extrusion-based AM for the …
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Applications of ROMP Polymers
<p>Recently, a new type of stimuli-responsive polymer, named solvent programmable polymers (SPPs), was developed by ring-opening metathesis polymerization (ROMP) based on monomers containing recognition groups that display restricted rotation. We could modulate the binding properties of the SPPs by …
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Thermo-responsive Graft Copolymers based on Poly(Methyl Vinyl Ether): from Synthesis to Evaluation
Recently, stimuli-responsive polymer systems have been extensively investigated because of their wide range of potential applications in medicine, biotechnology, ecology and pharmacology. The most important stimulus in these studies is temperature. Thermo-responsive polymers are hydrophilic and …
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Development of Mesoporous Silicas, Responsive Polymer Microgels, and Related Nanocomposites
<p>This dissertation covers research on polymer-templated nanoporous materials and functional soft materials, and it consists of four major parts. The first part is on introduction. The next part (Chapters 2-3) describes the research work on the synthesis of silicas with spherical mesopores. …
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Ratiometric fluorescent metal ion indicators based on functionalized poly(N -isopropylacrylamide)
… based on the phase transition of a well-known stimuli-responsive polymer poly(N-isopropylacrylamide) (PNIPAM) is presented. The sensing mechanism involves the polymer conformational change resulting from charge neutralization by the analyte metal ions. The ultimate goal is to develop …
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POLY(N-ISOPROPYL ACRYLAMIDE)-COATED SURFACES: INVESTIGATION OF CYTOTOXICITY WITH MAMMALIAN CELLS AND THE MECHANISM OF CELL DETACHMENT
… tissues, such as those generated from stimulus-responsive polymers. Stimulus-responsive polymers undergo a physical or chemical change when a stimulus is applied. One such material is poly(N-isopropyl acrylamide), (pNIPAM), which undergoes a conformation change in a physiologically relevant …
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Asymptotically nonliner oscillatory shear: theory, modeling, measurements and applications of nonlinear elasticity to stimuli-responsive composites
… crosslinked networks of synthetic and biological polymers, exhibit a nonlinear rheological response to mechanical deformation. Oscillatory shear is a popular deformation protocol for viscoelastic characterization, both linear and nonlinear, the latter referred to as large amplitude oscillatory …
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Synthesis and kinetic processes in designed polymers
Traditional polymers have been long used for commercial products from polyester shirts to polyvinyl chloride (PVC) pipes or even polytetrafluoroethane (Teflon) non-stick coatings. As the needs of our society grow and change, innovative solutions must be created to overcome the challenges that …
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Synthesis and study of the micellization behavior of a dual temperature- and pH-responsive PAA-b-PNIPAM block copolymer
<p>Amphiphilic diblock copolymers are composed of hydrophilic and hydrophobic regions. When they are exposed to water, the hydrophobic blocks aggregate to form a hydrophobic core surrounded by hydrophilic regions outside to give a core-shell micelle. These micelles have many potential applications, …
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Polymerized ionic liquids by condensation polymerization: Stimuli responsive polyurethane gels and dispersions
<p>Ionic liquids have been used in free radical polymerizations to make polymerized ionic liquid (PIL) materials of various types. PIL gels based on imidazolium cations have been found to exhibit an anion-exchange induced stimuli responsiveness. This thesis explores incorporation of ionic liquids …