著者

矢野 浩之 能木 雅也 半田 敬信 久保田 広文

雑誌

バイオサイエンスとインダストリー = Bioscience & industry (ISSN:09148981)

巻号頁・発行日

vol.63, no.11, pp.720-721, 2005-11-01

著者

矢野 浩之

出版者

特定非営利活動法人 機能紙研究会

雑誌

機能紙研究会誌 (ISSN:02885867)

巻号頁・発行日

vol.49, pp.15-20, 2010 (Released:2012-12-10)

参考文献数

31

被引用文献数

2

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The plant cell wall consists of cellulose nanofibers or cellulose microfibril bundles. Since nanofibers are tight bundles of semi-crystalline extended cellulose chains, their thermal expansion is as low as that of quartz, while their strength is five times that of steel. However, the industrial utilization of nanofibers has been limited despite their being the most abundant biomass resource on the earth. Recently, due to the risk of depletion of oil reserves and global environmental concerns, the effective extraction of cellulose nanofibers and their utilizations have gained increasing attention. This review summarizes the research works on the production of nanofibers from plant resources and their application to design polymer composites.

著者

矢野 浩之

出版者

公益社団法人 高分子学会

雑誌

高分子 (ISSN:04541138)

巻号頁・発行日

vol.56, no.8, pp.614-618, 2007-08-01 (Released:2011-10-14)

参考文献数

23

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バイオリン,ピアノ,ギターといった弦楽器の響板・振動板には木材が利用される。そこには木材のどのような特性が必要なのか。さらにどのような特性の向上が求められているのか。今後,楽器材料はどのような方向に進むのか。これらの点について,楽器用木材の音響特性,化学処理によるその改質,未利用低質材からの楽器材料の製造などから説明する。

著者

矢野 浩之

出版者

一般社団法人日本エネルギー学会

雑誌

日本エネルギー学会誌 (ISSN:09168753)

巻号頁・発行日

vol.89, no.12, pp.1134-1140, 2010-12-20

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The plant cell wall consists of a cellulose nanofiber or a cellulose microfibril bundle. Since nanofibers are bundles of semi-crystalline extended cellulose chains, their thermal expansion is as low as that of quartz whilst their strength is five times that of steel. However, the industrial utilization of nanofibers has been limited despite their being the most abundant biomass resource on earth. Recently, due to the risk of depletion of oil reserves and global environmental concern, the extraction of cellulose nanofibers and their utilizations has gained increasing attention. This review summarizes the research works on the production of nanofibers from plant resources and their application in polymer composites.

著者

矢野 浩之

出版者

THE SOCIRETY OF RUBBER SCIENCE AND TECHNOLOGYY, JAPAN

雑誌

日本ゴム協会誌 (ISSN:0029022X)

巻号頁・発行日

vol.85, no.12, pp.376-381, 2012 (Released:2013-08-02)

参考文献数

12

被引用文献数

3 17

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The plant pulp consists of a cellulose nanofiber or a cellulose microfibril bundle. Since nanofibers are bundles of semi-crystalline extended cellulose chains, their thermal expansion is as low as that of quartz whilst their strength is five times that of steel. Recently, due to the risk of depletion of oil reserves and global environmental concern, the extraction of cellulose nanofibers and their utilizations has gained increasing attention. This review summarizes the research works on the production of nanofibers from plant resources and their application in polymer composites.

著者

矢野 浩之

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.46, no.8, pp.996-1002, 1997-08-15 (Released:2009-06-03)

参考文献数

43

被引用文献数

1

著者

矢野 浩之 椋代 純輔 大西 一広

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.39, no.444, pp.1207-1212, 1990-09-15 (Released:2009-06-03)

参考文献数

12

被引用文献数

6 8 2

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The top plate of guitar is usually made from two wood species which belong to different genus, that is, german spruce (Picea abies) and western redceder (Thuja plicata). To clarify the characteristics of these species and of the wood materials for guitar top plate, the acoustic properties of the specimens prepared from the neighbour portion of the top plate were measured by means of free-free flexural vibration method. The results were compared with the evaluation by an expert of guitar manufacture.The mean values of specific dynamic Young's modulus (E/γ) and tanδ of german spruce were higher than those of western redceder, while among various wood species these two had higher E/γ and lower tanδ in the longitudinal direction. These characteristics were particularly pronounced in the specimens which were judged by the expert to be high grade. Moreover, the standard deviations of the acoustic properties of the high grade specimens were smaller than those of the medium or low grade ones regardless of the species.The value of E/γ in the longitudinal direction, which can be obtained easily, seemed to be a convenient criterion for selecting the wood material suitable for guitar top plate. Because it correlated highly with tanδ in the longitudinal direction, and also with the ratio of tanδ in the radial direction to that in the longitudinal direction. Evaluation using both E/γ and tanδ in the longitudinal and radial directions was more appropriate, because the experimental values of E/γ and tanδ in any grain angle agreed with the values calculated based on Hankinson's equation.

著者

矢野 浩之

出版者

京都大学「京都からの提言」事務局

雑誌

京都大学 附置研究所 ・センター シンポジウム : 京都からの提言-21世紀の日本を考える

巻号頁・発行日

vol.4, pp.15-26, 2009-12-01

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会期・会場: 平成21年3月14日(土)午前10時-午後5時25分 : 名古屋 名鉄ホール ; 後援: 読売新聞社 : (財)京都大学教育研究振興財団

著者

矢野 浩之

出版者

京都大学生存圏研究所

雑誌

生存圏研究 (ISSN:1880649X)

巻号頁・発行日

vol.6, pp.23-30, 2010-10-01

著者

矢野 浩之 椋代 純輔 大西 一広

出版者

社団法人日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.39, no.444, pp.1207-1212, 1990-09-15

被引用文献数

3 8

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The top plate of guitar is usually ismade from two wood species which belong to different genus,that is german spruce (picea abies) and western redceder (Thuja plicata). To clarify the characteristics of these species and of the wood materals for the top plat were measaured by means of free-free flexural vibretion method.The resulta were compared with the evaluation by ezpert of guitar mannufacture.The mean zalues of sapecific dynamic Young's modulus(Ε/γ)and tan δof german spruce were higher than those of western redceder,whileamong various wood species these twe had higher Ε/γand lower tan δ in the longitudinal direstion.These characteristics were particularly pronounced in the specimens which were judged by the ezpert to be high grade.Moreover,the standard deviation of the acouatia properties of the high grade sapecimens were smaller than of the medium or low grade ones regardless of the species. The value of Ε/γin the longitudinal direction,which can be obtained easily,seemed to be a convenient criterion for selecting the wood material suitable for guitar top plate.Because it correlated highly with tan δ in the longitudinal direction,and also with the ratio of tan δ in the radial direction was more appropriate,because the experimental values of Ε/γ and tan δ in any grain angle agreed with the values calaulated based on Hankinson's equation.

著者

中坪 文明 矢野 浩之 高野 俊幸 佐川 尚 伊達 隆

出版者

京都大学

雑誌

基盤研究(B)

巻号頁・発行日

2010

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バルクへテロ接合型有機薄膜太陽電池に用いられている p-および n-型半導体機能官能基担持させたセルロースおよびセルロースナノファイバー(CNF)誘導体からバルクへテロ接合型光電変換デバイスを作成し、そのエネルギー変換効率を測定した。その結果、CNF-ZnPc から作成したフィルムデバイスは低いエネルギー変換効率(0.0011%)ではあるが光電変換機能を示した。また、CNF-graft-poly-3-alkylthiophene から作成したフィルムデバイスのエネルギー変換効率は 0.025%(約 25 倍)に向上した。すなわち、CNF 担持 p-型官能基の構造を最適化することで、更なるエネルギー変換効率の向上が期待されると考えられる。