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Showing 1 to 20 of 82 for “"polymer materials"”.
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Biomasses for the obtainment of new functional polymer materials
… of work dedicated to the development of new polymeric systems based on the use of raw materials derived from biomasses. Biomasses are a very versatile renewable energy source with low environmental impact and are less expensive than the resources deriving from petroleum. Furthermore, the use …
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Functional Polymer Materials: From Iptycenes to Ring-Opening Polymerizations
… a variety of applications. Amine-functionalized polymers are used in graphene oxide composite membranes towards aqueous filtration. Guanidinium-functionalized polymers are explored for impedance-based gas sensing. Pyrazolium-functionalized polymers are fabricated into anion-exchange membranes. In …
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Measuring Acoustic Attenuation of Polymer Materials Using Drop Ball Test
<p>Polymers are often used for vibration damping and energy absorption. The effect of a material in reducing the strength of sound waves traveling through it is called acoustic attenuation. In the past, attenuation has mostly been evaluated in the MHz frequency range, using a pulse generator and …
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Synthesis, Characterization, Membrane Fabrication and Gas Transport Behavior of Liquid Crystal Polymer Materials
A variety of liquid crystalline (LC) materials have been examined as potential membrane separation materials. The order present in the LC phases has measurable effects on solute sorption, diffusivity, permeability, and selectivity, and can thus be used to tune the transport and separation of …
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Active Response of Polymer Materials from External Stimuli – Solvents and Light; Grafting Reactions on Perovskite Layers
<p>The active response of a series of polymeric materials was investigated. Both solvent activated and light activated thin films and wire systems show dynamic behaviors when exposed to different stimuli.</p> <p>Solvent mediated fluxional behavior of polymer thin films involved extensive, rapid …
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Topographic characterization of polymer materials at different length scales and the mechanistic understanding of wetting phenomena
… into topographic characterisation of engineering polymer surfaces towards to physical-chemical and mechanistic understanding of wetting phenomena on rough surfaces. Non-contact chromatic confocal imaging was chosen and justified as the optimal measuring method to study and correlate surface …
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Design and fabrication of planar inductors for inductive proximity sensors
… in the industrial manufacturing of goods and materials. Position sensing can take on a variety of forms and is used in the measurement of a wide range of variables such as distance, speed, the number of revolutions per minute, orientation, identification, and in collision protection. Proximity …
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Simulated Syngas Ash Deposition on the Leading Edge of a Turbine Vane with Film Cooling
… a method for substituting the particles with polymer materials so studies can be done under more workable conditions. PVC and Teflon particles were used and deposited against a flat plate to mimic a published experiment that used real coal ash. Temperatures were near the melting point of the …
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Formaldehyde mass-transfer properties study
… by many types of consumer products and indoor materials, indoor air can contain high concentrations of formaldehyde. Exposure to formaldehyde is hazardous to human health. Thus knowledge of formaldehyde mass-transfer properties is critical to efforts to reduce formaldehyde emissions and …
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The wettability of biomaterials determines the protein adsorption and the cellular responses
During the past several decades polymer materials become widely used as components of medical devices and implants such as hemodialysers, bioartificial organs as well as vascular and recombinant surgery. Most of the devices cannot avoid the blood contact in their use. When the polymer materials …
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A study of the feasibility of advanced hybrid thermoplastic composites for aerospace and automotive applications
… performance has resulted in the need for materials with high specific strength and stiffness. Fibre reinforced polymer materials have found increased application in the automotive and aerospace industries by virtue of their excellent specific properties, good corrosion resistance, …
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The evaluation of novel nanoporous materials for use in interventional cardiology
… The study investigates the cytotoxicity of polymer materials incorporating either Ni or Zn CPO-27 MOFs and NO, finding enhanced cytocompatibility with MOF-incorporated materials. The influence of MOF weight percentage and NO on cell viability, aging effects, and exposure duration on …
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PROTON BEAM WRITING OF MICRO/NANO FLUIDIC DEVICES FOR DNA ANALYSIS AND PARTICLE SEPARATION
… are found in biology, chemistry and medicine. Polymer materials like polydimethylsiloxane (PDMS) through soft lithography, polymethylmethacrylate (PMMA) are very popular for micro/nanofludic fabrication because of the easy process and low cost. In this thesis, different types of molds (resist, …
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Novel Materials and Processes for Fabrication of Integrated Photonic and Opto-Electronic Devices
… silicon dioxide and III-Vsemiconductor based materials, are the basis for many advances in the optical telecommunication area. Thin films are the foundation for these devices. Typically thin films are made from methods that involve expensive or complicated processes, such as chemical vapor …
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Large core polymer optical backplanes for fluorescence detection
… is being developed which utilizes the same polymer materials used for biochips to create optical components. By combining elements such as waveguides and mirror couplers, arrays of small devices capable of out-of-plane detection are possible, decoupling the biochip design from the transducer …
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An investigation of nanoscale materials and their incorporation in patch antenna for high frequency applications
The rapid development in the polymer-based electronic contribute a strong determination for using these materials as substitute to the high-cost materials commonly used as medium substrate in the fabrication of Microstrip Patch Antenna (MPA). Antenna technology can strongly gain from the …
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Synthysis of polymer/nano-droplet composites from reverse microemulsion polymerization
… system were investigated at 22±1°C. Free radical polymerizations were conducted in L<sub>2</sub> domain. Only opaque polymer rods were obtained. Acrylamide, a water soluble monomer, plays a role of co-surfactant which greatly expands the L<sub>2</sub> domain. However, polymerizations only yielded …
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A conjugated polymer plastic gel
… gel route to process highly oriented conjugated polymer films and fibers. The incorporation of hexafluoroisopropanol, a strong and stable dipolar group, to the polythiophene backbone enhances the solubility and especially, the hydrogen bond forming capabilities of the polymer. This …
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