著者

Yoko Nomura Toshio Sasaki Hyung-Been Kang Ryuichi Suwa

出版者

The Society of Fiber Science and Technology, Japan

雑誌

Journal of Fiber Science and Technology (ISSN:21897654)

巻号頁・発行日

vol.73, no.11, pp.317-326, 2017-11-10 (Released:2017-11-28)

参考文献数

41

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Okinawa Island is part of the Ryukyu Islands located in southern Japan. Basho-fu is a unique and traditional Okinawan textile made from the banana plant Itobasho. The traditional production process of Bashofu has not been well studied scientifically. In this study, materials from the traditional degumming process (Udaki) of Basho-fu were characterized by morphological observation and other analytical instruments (FT-IR and XRD). The fiber materials degummed by the traditional and the modern laboratory methods were compared. The vascular bundles of the main component of Basho-fu fibers were conserved in the materials processed by the two degumming methods. However the FT-IR study indicated that the traditional method was milder than the laboratory process. The results scientifically confirms that the delicate traditional degumming step is a crucial process in the production of the fine Basho-fu textiles.

著者

Hiasa Shou Kumagai Akio Endo Takashi Edashige Yusuke

出版者

The Society of Fiber Science and Technology, Japan

雑誌

Journal of Fiber Science and Technology (ISSN:21897654)

巻号頁・発行日

vol.72, no.1, pp.17-26, 2016-01-12 (Released:2016-01-12)

参考文献数

34

被引用文献数

7 21

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In this study, pectin‐containing cellulose nanofibers (CNFs) were prepared from mandarin peel (MP), and the effect of pectin, which remained in purified cellulose after a purification treatment, on the aggregation of CNFs was investigated. Cellulose samples with different pectin concentrations were prepared by bleaching and a hydrothermal treatment with an acid solvent. Following the preparation of the different pectin‐containing cellulose samples, each cellulose sample was fibrillated by a high‐pressure homogenizer treatment. The morphological structures of CNF samples were observed using atomic force microscopy (AFM) and scanning electronic microscopy (SEM). The AFM images of the pectin‐containing CNFs showed that the pectin covered the surfaces of the CNFs and that the CNFs obtained from MP were finer than those obtained from wood cellulose. Further, the SEM images of the oven‐dried samples showed that the pectin‐containing CNFs were finer than the purified CNFs obtained from MP. Moreover, the oven‐dried pectin‐containing CNFs could be redispersed in water. This indicated that pectin has a potential to prevent the aggregation of CNFs. However, the addition of commercial pectin to a CNF suspension did not inhibit CNF aggregation. Although an interaction between the CNFs and pectin were confirmed in the case of the pectin‐containing CNFs prepared from MP, the commercial pectin did not interact with the purified CNFs. This CNF‐pectin interaction, which is based on their original structures, probably results in the pectin covering the surfaces of the CNFs. It is likely that this is the reason that the aggregation of the CNFs was inhibited.

著者

Eri Ohto-Fujita Nozomi Hatakeyama Aya Atomi Shunsuke Yasuda Shoki Kodama Tomoaki Atomi Kazuya Tanaka Noboru Hirose Kenji Harada Yoshihide Asano Toshiyuki Watanabe Yukio Hasebe Miho Shimizu Yoriko Atomi

出版者

The Society of Fiber Science and Technology, Japan

雑誌

Journal of Fiber Science and Technology (ISSN:21897654)

巻号頁・発行日

vol.77, no.10, pp.258-265, 2021 (Released:2021-10-23)

参考文献数

49

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Chicken eggshell membrane (ESM) is a two-layered insoluble sheet located between the eggshell and the albumen and is composed of fibrous proteins. Naturally occurring composite material, such as ESM have various ameliorative effects for osteoarthritis of the knee, joint, and connective tissue when ingested and absorbed as supplements. The physiological effects by oral ESM intake, especially on respiratory function,remain unclear. We have recently reported that tritium-labeled ESM powder can be digested and absorbed by mice and distributed in tissues throughout the body. We have also reported that the application of hydrolyzed water-soluble ESM to human skin significantly improved skin elasticity, which declines with aging, in a before and after comparison at 3 months, and significantly reduced wrinkles at the corners of the eyes compared to controls. In the present double-blind, placebo-controlled study, we examined breathing, skin, and body functions, such as zigzag walking, after ESM ingestion compared to controls. We hypothesized this to improve physical functions by improving the extracellular matrix (ECM) within the range of homeostasis. Among 20 healthy subjects (age: 21–68 years), the group given ESM supplementation for 8 weeks showed significantly increased rate of change in arm skin elasticity, respiratory function (forced expiratory volume in 1 s to forced vital capacity ratio (FEV1/FVC)), and zigzag walking speed compared to controls. There was a significant correlation between the rate of change in FEV1/FVC and that of zigzag walking after 8 weeks compared to the initial values. These functional improvements observed in skin elasticity, lung function, and motor function with oral intake of ESM suggest that maintaining elasticity in the cellular environment can support overall health and activity levels.

著者

石森 綱行 渡辺 大介 新井 幸三

出版者

一般社団法人 繊維学会

雑誌

Journal of Fiber Science and Technology (ISSN:21897654)

巻号頁・発行日

vol.75, no.6, pp.72-92, 2019-06-10 (Released:2019-06-20)

参考文献数

40

被引用文献数

2

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The hair straightening method applying heat-treatment with glyoxylic acid (GA) at about 180 ̊C was studied. Straightening effect was estimated by shampooing test. The stress-strain relationship of GA/heattreated hair was also studied. It was revealed that from the WAXS, DSC study and stress-strain characteristics of treated sample, new crosslinking is introduced into the rod region of the intermediate filament (IF), a slight decrease in the degree of crystallinity but an increase in the thermal stability of the α-crystallites. The initial modulus and extensional work of the treated sample were markedly increased as compared to untreated sample. It was demonstrated that such large internal stress accumulated in the keratin network chain disappeared by relaxation treatment in water at 52 ̊C for 1 h. A part of the new cross-linking is destroyed when the treated hair is extended, but residual stable cross-linking to extension contributes to increase of initial modulus of the hair. Study of SAXS showed that the interspace distance between IFs increased about twice as much as the value of untreated sample. SEM observation shows that oblateness of the hair decreased by 10%, and cross-sectional shape changed from elliptical shape to circular shape which followed by increase of cross-sectional area. This phenomenon was considered to be due to the stress relaxation occurring in shampooing process throughout the cleavage of SS bonds located interfacial region between hard IF and soft KAP materials in water. Shampooing test of GA/heat-treated sample showed excellent set-ability. It was concluded that introduction of GA crosslinks into IF rod region resulted in a modified IF with higher modulus of elasticity than that of untreated hair, which means that the increase of resilience maintains the straight conformation exhibiting excellent straightening effect.

著者

河原 豊 栗原 夏実 大野 岳輝 渡部 邦彦 田中 俊一 山本 真揮 脇坂 博之

出版者

一般社団法人 繊維学会

雑誌

Journal of Fiber Science and Technology (ISSN:21897654)

巻号頁・発行日

vol.78, no.7, pp.114-120, 2022 (Released:2022-07-22)

参考文献数

17

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The waste chicken feathers were treated with the enzymes (dissociating disulfide bonds) produced by thermophilic Meiothermus ruber H328, and then the treated feathers were milled and subjected to the hot-press compression molding. It was found that the recrystallization of the feather keratin was interfered with to some extent due to the lack of S-S bonds. On the other hand, the slight reinforcement of the feather resin with the wood fibers was effective to enhance the tensile behavior and the thermal stability of the feather resin.

著者

哈 斯 木村 照夫

出版者

一般社団法人 繊維学会

雑誌

Journal of Fiber Science and Technology (ISSN:21897654)

巻号頁・発行日

vol.73, no.12, pp.355-362, 2017-12-10 (Released:2017-12-28)

参考文献数

21

被引用文献数

1 1

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A new type of paper, which composition is mixed of PLA and cellulose, was developed through heat molding process in this study. After folding of paper, this high performance paper contained thermoplastic PLA can be molded by heating and produced to the crafts. The properties of paper before and after the heating were examined and the results demonstrated their characteristics with high performance. In particular, the folding test showed that the developed paper was folded easily by hand. From the results of heat shrinkage test, it was also shown that the heat shrinkage ratio of the paper was suppressed by mixing cellulose. When PLA fiber content is lower than 60 wt%, heat shrinkage of the paper does not occur after heating. The results of tensile tests showed that heating increases the tensile strength of the paper and the tensile strength reaches the maximum value at 20 wt% PLA content.

著者

Lina Wakako Toshiyasu Kinari

出版者

The Society of Fiber Science and Technology, Japan

雑誌

Journal of Fiber Science and Technology (ISSN:21897654)

巻号頁・発行日

vol.77, no.1, pp.9-18, 2021-01-15 (Released:2021-01-30)

参考文献数

27

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In this study, the influences of the fabric color of pantyhose (PS) on the visually perceived surface roughness were investigated. Sensory evaluations and relevant statistical analyses of the visually perceived PS surface roughness (VPPSSR) were conducted using a plate-type leg model for Japanese females; the model was covered with beige-colored PS. The visual information of the PS-covered plate-type leg model did not provide visual features usable as cues for the visual evaluation of an objectʼs surface roughness, such as a highlight pattern. The PS-covered leg models used for the sensory evaluation included eight different beige fabric colors and three different apparent colors, owing to differences in the stitch density on the leg model. Additionally,the visual features obtained via an image analysis of the PS-covered leg model were examined. As a result, it was confirmed that the VPPSSR was influenced by the apparent color of the PS-covered leg model. In conclusion, the VPPSSR in beige-colored PS is influenced by the fabric color, especially the L* value; the brighter the fabric color, the finer the VPPSSR.

著者

石森 綱行 渡辺 大介 新井 幸三

出版者

一般社団法人 繊維学会

雑誌

Journal of Fiber Science and Technology

巻号頁・発行日

vol.75, no.6, pp.72-92, 2019

被引用文献数

2

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<p>The hair straightening method applying heat-treatment with glyoxylic acid (GA) at about 180 ̊C was studied. Straightening effect was estimated by shampooing test. The stress-strain relationship of GA/heattreated hair was also studied. It was revealed that from the WAXS, DSC study and stress-strain characteristics of treated sample, new crosslinking is introduced into the rod region of the intermediate filament (IF), a slight decrease in the degree of crystallinity but an increase in the thermal stability of the α-crystallites. The initial modulus and extensional work of the treated sample were markedly increased as compared to untreated sample. It was demonstrated that such large internal stress accumulated in the keratin network chain disappeared by relaxation treatment in water at 52 ̊C for 1 h. A part of the new cross-linking is destroyed when the treated hair is extended, but residual stable cross-linking to extension contributes to increase of initial modulus of the hair. Study of SAXS showed that the interspace distance between IFs increased about twice as much as the value of untreated sample. SEM observation shows that oblateness of the hair decreased by 10%, and cross-sectional shape changed from elliptical shape to circular shape which followed by increase of cross-sectional area. This phenomenon was considered to be due to the stress relaxation occurring in shampooing process throughout the cleavage of SS bonds located interfacial region between hard IF and soft KAP materials in water. Shampooing test of GA/heat-treated sample showed excellent set-ability. It was concluded that introduction of GA crosslinks into IF rod region resulted in a modified IF with higher modulus of elasticity than that of untreated hair, which means that the increase of resilience maintains the straight conformation exhibiting excellent straightening effect.</p>