Sen'i Gakkaishi
Online ISSN : 1884-2259
Print ISSN : 0037-9875
Search
Advanced search
OR
Browse
Search
Volume 67, Issue 5
Displaying 1-8 of 8 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
Reviews and News
Columns
Commentations
Active Young Researchers in Fiber and Textile Fields
Series
Original Articles
Transaction
  • Electrospinning and Characterization of Aligned Nanofibers from Chitosan/Polyvinyl Alcohol Mixtures: Comparison of Several Target Devices Newly Designed
    Amalina M. Afifi, Masaki Yamamoto, Hideki Yamane, Yoshiharu Kimura, Ah ...
    2011 Volume 67 Issue 5 Pages 103-108
    Published: May 10, 2011
    Released on J-STAGE: June 10, 2011
    DOIhttps://doi.org/10.2115/fiber.67.103
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Electrospinning of pure chitosan or chitosan/poly(vinyl alcohol) (PVA) (blend) was carried out with an optimization of the electrospinning conditions. The electrospinning of the pure chitosan was only possible at a relatively high electric field of 5 kV/cm into fibers with a diameter as thick as 30 μm, and its reproducibility was very poor. Blending of PVA into chitosan significantly improved the spinnability and the chitosan/PVA blend fiber was electrospun for further characterization. Several target devices were designed and examined to collect aligned nanofibers of chitosan/PVA. The most efficient was a rotating collector having grounded short wire bars arranged on a drum. Over 90 % of electrospun fibers were collected in parallel to the take-up direction with this collector. The fiber alignment was further improved with increasing the collector rotation speed up to a maximum speed of 4.7 m/s. The aligned chitosan/PVA fibers were subjected to drawing to 1.5 times and the crystallization of chitosan fractions was induced without indicating the clear crystal orientation.
    View full abstract
    Download PDF (1737K)
  • Wear Resistance and Tensile Properties of Filler-added Polyamide 6 Fibers
    Toshihira Irisawa, Tatsuro Takamura, Satoshi Momozono, Junichi Kaneko, ...
    2011 Volume 67 Issue 5 Pages 109-118
    Published: May 10, 2011
    Released on J-STAGE: June 10, 2011
    DOIhttps://doi.org/10.2115/fiber.67.109
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The abrasive wear rate, the coefficient of friction, and the tensile properties have been investigated on the polyamide 6 (PA6) fibers added with titanium carbide particles (TCP's), aluminum borate whiskers (ABW's) and vapor-grown carbon fibers (VGCF's). The wear rate of the fibers has been determined using a method previously proposed by the present authors. All the fillers used in this study effectively increased the wear resistance of the PA6 fiber. The effect of the fillers to increase the wear resistance of the fiber was analyzed in relation to the changes in the microhardness, the resistance against sliding and the fracture toughness against abrasive wear. The rolling effect of the fillers having a small aspect ratio was recognized from the decrease in the resistance against sliding.
    View full abstract
    Download PDF (2376K)
  • An Approach to the Photostabilization of Dyes: The Effects of Multifunctional Stabilizers on the Light Fastness of Acid Dye
    Hironori Oda
    2011 Volume 67 Issue 5 Pages 119-124
    Published: May 10, 2011
    Released on J-STAGE: June 10, 2011
    DOIhttps://doi.org/10.2115/fiber.67.119
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Numerous potential triazine-stabilizers were synthesized to prolong the life of an azo dye. The effect of these compounds in reducing photofading was examined in cellulose acetate film. The simple use of UV absorbers or radical scavengers was not necessarily useful in improving the light fastness of the dye. The triazine-stabilizers containing a number of different types of stabilizing fragments, however, markedly suppressed the photofading of the dye. It was proposed that nickel complexes of multifunctional triazine-stabilizers may be used as effective stabilizers in the fading of dyes.
    View full abstract
    Download PDF (813K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top