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Poly(vinyl caprolactam) (PVCL) is an especially attractive temperature-responsive polymer due to its biocompatibility and the fact that its lower critical solution temperature (LCST) is in the physiological range (32–34 °C). Here, PVCL was copolymerized with hydroxymethyl acrylamide (NMA) and electrospun to create PVCL based temperature-responsive chemical hydrogel nanofibers for the first time. Field...
Air filtration efficiency and pressure drop of nanofibrous filter media based on polyacrylonitrile (PAN) nanofibers with and without TiO 2 nanoparticles were evaluated. The nanofibrous filter media were fabricated by covering a cellulose substrate with varying masses of PAN fiber or PAN/TiO 2 hybrid nanofiber. Capillary flow porometry tests revealed that the hybrid nanofibrous filter...
Conducting nanofibers of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/polyvinyl alcohol (PEDOT:PSS/PVA) were fabricated at room temperature and via electrospinning with diameters ranging from 100 to 300 nm. The nanofibers were irradiated with Gamma and X-rays for varying lengths of time and the change in conductivity was evaluated. Raman and Electron Spin Resonance spectroscopy of X-ray...
Nanofibers embedded with the functional polymers exhibited a charged surface. These fibers were incorporated into microfluidic channels to provide high surface area and functional surfaces within a microfluidic system. The positively or negatively charged nanofibers were fabricated by blending of hydrophilic PVA with functional polymers with available amine groups or carboxyl groups, respectively...
We report here the formation and structural characterization of optically responsive, highly birefringent electrospun nematic liquid crystal (LC) microfibers. The LC microfibers are electrospun from a solution of polylactic acid (PLA) and low molecular weight 4-pentyl-4 ’ -cyanobiphenyl (5CB) in chloroform/acetone solvent. In the electrospinning process, the low molecular weight 5CB phase-separates...
Distribution of biotin at a depth of 3–10nm from the surface of electrospun polylactic acid (PLA) fibers has been assessed by X-ray photoelectron spectroscopy (XPS) and compared to the distribution predicted by bulk calculations. Biotin concentration in the outer 3–10nm of the fibers is greater than the predicted if biotin was distributed uniformly within the fiber. Availability of biotin for streptavidin...
Nanocomposite fibers of nylon-6 and an organically modified montmorillonite (O-MMT), Cloisite-30B, were prepared by electrospinning. Dispersion and exfoliation of O-MMT in nylon-6 were achieved by melt-extrusion in a twin-screw extruder prior to dissolving in aqueous formic acid for electrospinning. The effects of O-MMT layers on the properties of the nylon-6 solution and electrospun nanocomposite...
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