Papers:
Conformational analysis of alternating copolymers and their association into nanoarchitectures
Our research focuses on the characterization of the association and the properties in aqueous solution of nano-structures, particularly on nanotubes composed of amphiphilic alternating copolymers. These copolymers constitute a pH sensitive hydrophilic group (maleic anhydride) [...]
Nanopatterned Organic Materials for Photovoltaic Devices
Williams S.S., Hampton M.J., Retterer S.T., Templeton J.L., Samulski E.T., DeSimone J.M., University of North Carolina at Chapel Hill, US
In order to further increase the efficiency of current state-of-the-art photovoltaic devices, the interfacial architecture must be controlled at the nanoscale such that the D/A blend results in an ideal morphology for maximizing charge collection [...]
Spray-coating deposition for large area organic thin-film devices
Organic electronic devices based on solution-processable polymers are among the most promising applications of organic semiconductors. Low-cost fabrication by means of simple coating and printing techniques is surely one of their greatest advantages. We report [...]
Nanoparticle synthesis using polyelectrolyte nanoreactors
We report a facile method to synthesize a wide range of nanoparticles via polyelectrolyte nanoreactors. The nanoreactors are formed through ion-induced collapse of highly extended, high molecular weight anionic polyelectrolytes using metal salts. The formation [...]
Metal-polymer hybrid material: A unique coordination for carbon-carbon coupling reactions
A method for making poly-aminophenol based hybrid material by in-situ polymerization of aminophenol using palladium acetate as the oxidant is described. The oxidative polymerization of aminophenol leads to the formation of poly-aminophenol, while the reduction [...]
Effect of Sonication on Mechanical Properties of Polymers and Nanocomposites
This study investigates the influence of sonication on the viscosity and mechanical properties of polymeric nanocomposites. Parameters of study are percentage level of catalyst, temperature level, neat polymer (vinyl ester), nanoparticle [nanoclay] infused polymer (nanocomposite) [...]
Modifying the kinetics of nanoscale diacetylene polymerization for time-temperature indicator applications
Castillo-Martínez E., Reibenspies J.H., Hall L.J., Kozlov M., Biewer M.C., Harrington A.C., Smith D.E., Huffman B., Prusik T., Grabiner F., Baughman R.H., University of Texas at Dallas, US
The present study describes the crystal structures of selected diacetylene molecules that can be useful for time-temperature indicator applications, and important methods for modifying polymerization kinetics for these applications. Different powder x-ray diffraction patterns, corresponding [...]
Polymer Network on Optical Fiber Core
The ultimate goal of the research is to fabricate a cylindrical polymer network (hydrogel) on the side-surface (not the distal end) of an optical fiber core and characterize spectroscopically its swelling/de-swelling ability in response to [...]
Thermal Analysis of Polyimide-Cobalt Ferrite Nanocomposites
Thermal stability and thermomechanical behavior of new polymer-based nanocomposite was investigated to assess the viability of the fabrication process. The nanocomposite film consisted of a polyimide (PI) matrix and nanodispersoids of a recently developed high-coercivity [...]
Dynamic rheology and microstructure of polymer/clay nanocomposites prepared under Sc-CO2 by melt compounding
PP- and EVOH-clay nanocomposites were prepared using a twin screw extruder with the aid of supercritical carbon dioxide (Sc-CO2). The dynamic rheological properties were measured using a rheometer in the oscillatory mode. X-ray diffraction and [...]
Large Area Replication of AAO Nanostructure Using a Solvent Exchange Method and UV-curable Polymers
We made a successful fabrication of nanopatterns with various UV curable materials, 311RM, Ethylene glycol dimethacrylate (EGDA), 4-hydroxy butyl acrylate (4-HBA) and pyrrole. AAO nanopatterns larger than 5 cm 5 cm were successfully replicated. It [...]
Characterization of poly(vinyl alcohol)-based composites prepared by electrospinning technique with in situ coffining process
A number of methods are available for preparing a fiber reinforced polymer composite from two or more polymer matrixes and fibers. We propose new type reinforced polymer composites by electrospinning technique with in situ coffining [...]
Rigid Poly(vinyl chloride) / Halloysite Nanocomposites
Polyvinyl chloride (PVC)/ halloysite nanotubes (HNT) nanocomposites were prepared by melt blending of PVC with HNT. PVC masterbatch powders were first hand blended with 1, 3, 5 and 8% w/w of HNT and then melt-mixed [...]
Electric Field Effect on the Rheology of MWCNT Dispersions in Liquid Crystalline Polymers
Carbon nanotubes (CNT) are ideal candidates for the development of nanocomposites. Nevertheless, to achieve their potential they should be dispersed and aligned with a specific orientation. Many techniques have been proposed to achieve these requirements [...]
Novel Composites of Carbon Nanotubes with a Poly(Phenylene Ethynylene) by Non-Covalent Wrapping for Photovoltaic Devices
Ramos J.C., Cortes P., Moggio I., Arias E., Martínez C., Moreno K.J., Universidad Autonoma de Ciudad Juarez, MX
Conjugated polymers exhibit optoelectronic properties comparable with those of inorganic semiconductors and with some advantage over them. By their side, carbon nanotubes (CNTs) offer a great opportunity for exciton dissociation. For this reason, the combination [...]
Journal: TechConnect Briefs
Volume: 2, Nanotechnology 2009: Life Sciences, Medicine, Diagnostics, Bio Materials and Composites
Published: May 3, 2009
Industry sectors: Advanced Materials & Manufacturing | Personal & Home Care, Food & Agriculture
Topics: Advanced Materials for Engineering Applications, Personal & Home Care, Food & Agriculture
ISBN: 978-1-4398-1783-4