繊維学会誌
Online ISSN : 1884-2259
Print ISSN : 0037-9875
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71 巻, 1 号
繊維学会誌
選択された号の論文の17件中1～17を表示しています
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繊維と工業
時評
新春座談会
年頭の抱負を語る
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連載〈溶融紡糸の原点〉
連載〈業界マイスターに学ぶせんいの基礎講座－4〉
繊維学会創立70周年記念連載〈技術が支えた日本の繊維産業-生産・販売・商品開発の歩み-16〉
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  • Thermal Conductivity of Polyurethane Sheets Containing Alumina Nanofibers
    Nakane Koji, Ichikawa Shinya, Gao Shuya, Seto Mikita, Irie Satoshi, Yo ...
    2015 年 71 巻 1 号 p. 1-5
    発行日: 2015/01/10
    公開日: 2015/01/09
    DOIhttps://doi.org/10.2115/fiber.71.1
    ジャーナル フリー
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    Alumina nanofibers were formed by heating poly(vinyl alcohol) (PVA)/boehmite composite nanofibers at various temperature. Polyurethane sheets containing the alumina nanofibers were formed by impregnation of alumina nanofiber mats with polyurethane. Thermal conductivity of the sheet containing the non-porous α-alumina nanofibers of 5.7 vol% was 1.29 W/mK. The aligned nanofibers act as a linear heat-transfer pathway in the sheet and thus high thermal conductivity was achieved at a low alumina content. The sheets containing the aligned alumina nanofibers had anisotropic thermal conductivity in the plane direction of the sheet.
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  • 光音響赤外分光法 (PAS) による文化財分析の基礎的研究―繊維文化財への適用性の検討―
    奥山 誠義, 佐藤 昌憲
    2015 年 71 巻 1 号 p. 6-9
    発行日: 2015/01/10
    公開日: 2015/01/09
    DOIhttps://doi.org/10.2115/fiber.71.6
    ジャーナル フリー
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    It is already known that the infrared spectroscopy is one of the most useful method for the identification of cultural properties, especially for organic materials. However usual analytical procedure, such as Transmission (TR) or Attenuated Total Reflection measurement (ATR), requires preliminary treatment of sampling, and sometimes give damages to valuable samples by mixing or pressing. Contrary to this, Photoacaustic Spectroscopy (PAS) uses totally non-destructive procedures. To clarify the advantage of PAS compared with other procedures, some kinds of natural fibers (processed silk, hemp and ramie) were investigated in this study using PAS, TR or ATR. As a results, we confirmed that PA spectra of these samples were almost identical with that of other procedures (TR or ATR), and PAS could measure using very small amount of samples. We are further continuing the PAS study using various kind of organic cultural properties.
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  • Synthesis of New Spherical Polylysine Oligosaccharide Dendrimers with C6 Methylene Spacer
    Ying Li, Shuqin Han, Uryu Toshiyuki, Yoshida Takashi
    2015 年 71 巻 1 号 p. 10-17
    発行日: 2015/01/10
    公開日: 2015/01/09
    DOIhttps://doi.org/10.2115/fiber.71.10
    ジャーナル フリー
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    New first, second, and third generation sphere-type polylysine glycodendrimers with cellobiose units at the terminal (first, second, and third generation cellobiose-C6 spacer-polylysine dendrimers) were synthesized from 1, 4-diaminobutane as a starting compound. Repeated condensations by N, N- bis(tert-butoxycarbonyl)-L-lysine (di-boc-lysine) and deprotections of the boc groups gave the first, second, and third generation sphere-type polylysine dendrimers with 4, 8, and 16 amino groups at the terminal in 75%, 82%, and 83% yields, respectively. To increase the flexibility of attached oligosaccharides at the terminal, a methylene spacer with six methylene carbons (C6 methylene spacer) was introduced between the polylysine dendrimers and cellobiose; that is, ethyl 1-hydroxylhexanoate was reacted with peracetylated α-D-cellobiosyl bromide to afford 2, 2', 3, 3', 4', 6, 6'-hepta-O-acetyl-1-O-(6- ethoxycarbonylpentoxy)-β-D-cellobioside. After hydrolysis of the acetyl and ethyl ester groups to recover hydroxyl groups and carboxylic acid, the obtained cellobiose unit with a carboxylic acid at the end of the C6 methylene spacer was condensed with the terminal amino groups of the polylysine dendrimers to give first, second, and third generation sphere-type cellobiose-C6 spacer-polylysine dendrimers in 48%, 53%, and 55% yields, respectively. The cellobiose unit was connected by the peptide bond to the polylysine dendrimers through the C6 methylene spacer without decomposition of the cellulobiose structure. MALDI TOF MS measurements gave signals that decreased at regular intervals because the molecular weight of the cellobiose unit was around 444 Da and it was found that the average substitution of the cellobiose unit gave nearly 4 among 4, 6.8 among 8, and 11 units among 16 terminal amino groups in the first, second, and third generation polylysine dendrimers, respectively, on high resolution 1H NMR and MALDI TOF MS spectra.
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