Journal of Fiber Science and Technology
Online ISSN : 2189-7654
ISSN-L : 2189-7654
Volume 80, Issue 6
Displaying 1-3 of 3 articles from this issue
Transaction
  • Sadayoshi Hayashi, Ayana Tomioka, Yuxin Jing, Hirokazu Yano, Hidenori ...
    Article type: Transaction
    2024 Volume 80 Issue 6 Pages 131-136
    Published: 2024
    Released on J-STAGE: June 18, 2024
    JOURNAL OPEN ACCESS

    The fully soluble self-doped poly(3,4-ethylenedioxythiophene) (S-PEDOT) fibers were fabricated for the first time by one-step wet-spinning at different concentrations (C) and characterized by means of SEM, four-probe method, XRD, and tensile test. It was found that the electrical conductivity of the S-PEDOT fiber wet-spun at C = 1.5 wt% attained as high as 1450 S/cm without the use of secondary dopant and post-treatment, which was higher than that of the cast film (946 S/cm). Furthermore, the S-PEDOT fiber exhibited superior mechanical properties compared to the cast film, where Young’s modulus, tensile strength of the S-PEDOT fiber were 4.0 GPa and 297 MPa, respectively. The results allowed us to conclude that the excellent electrical and mechanical properties of the S-PEDOT fiber were associated with the orientation of S-PEDOT chains along the fiber axis.

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  • Yumi Izuta, Kyohei Joko
    Article type: Transaction
    2024 Volume 80 Issue 6 Pages 137-145
    Published: 2024
    Released on J-STAGE: June 18, 2024
    JOURNAL OPEN ACCESS

    We investigated the dyeing behavior for wool fibers with p-phenylenediamine (pPDA) alone on current hair dye formation system. We compared the dyeing behavior for wool fiber dyed self-oxidizing pPDA solution by air with that for fiber dyed with model pPDA dyeing system of oxidation hair dye. The K/S-λ curves of wool fiber dyed with filtrate of air-oxidized pPDA solution differed from those of wool fiber dyed with model pPDA dyeing system. In model pPDA dyeing system (pH10) of oxidation hair dye, it was thought that not all of the compounds generated in the air-oxidized pPDA solution were dyed, but two types of oxidative dyes with characteristic absorption wavelengths of 480nm and 580nm were dyed. In addition, the oxidation dyes with absorption at 480nm and 580 nm were dyed on the wool fabrics were thought to be bicyclic 2-(4’-Amino aniline)-3-hydroxy-1,4-benzoquinone diamine and tricyclic Bandrowski’s base (BB), respectively. Based on these results, we proposed a new dyeing mechanism model, 2-(4’-Amino aniline)-1,4-diamino benzene formed at the solution/fiber surface diffuses into the fiber and is oxidized, lead to 2-(4’-aminoaniline)-1,4-benzoquinone diamine and BB.

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  • Manami Fukumura
    Article type: Transaction
    2024 Volume 80 Issue 6 Pages 146-154
    Published: 2024
    Released on J-STAGE: June 18, 2024
    JOURNAL OPEN ACCESS

    The societies started many actions to achieve the sustainable development according to the Sustainable Development Goals (SDGs) in the world. Recently, the word of SDGs is come to hear so often in our daily life. However, it seems to be slightly difficult to recognize what SDGs is and targets for each goal, especially for young generation. Gender equality which is one of the SDGs is gathering attention as an important social problem. Therefore, it is of importance to keep consciousness and understand the SDGs actions for young generation. In this study, the survey was conducted to investigate the awareness and practice of the SDGs initiatives for the young women who were studying in the fashion field. Additional aim of this survey was to understand the current situation of consumers for conscious reduction of the wasteful consumption and disposal of clothes. From the results of the survey, many of the young women agreed with the importance of the SDGs initiatives, but the ratio of the women having interest in them was reduced to about half, and the degree of recognition was about the same. Many of them were very interested in the eco-friendly lifestyle, and in activities to improve the women’s rights. It is importance to make young women understand the relations between their interests with the SDGs initiatives to raise awareness and understanding of the SDGs initiatives.

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