巻号一覧
2001 巻 (2001)
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2001 巻, 200 号
選択された号の論文の8件中1～8を表示しています
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ナノカーボンと新機能遠藤 守信2001 年 2001 巻 200 号 p. 202-205
発行日: 2001/12/20
公開日: 2010/06/28
ジャーナル フリーNanocarbons, which are obtained by controlling the structure in nanometer scale as well as bonding nature of carbon atoms, can provide the highly functionalperformances. The properties might be very different from those of conventional carbons. As one of the example of nanocarbons with one dimensionality, the carbon nanotubes and vapor grown carbon fibers with thin diameter less than 100nm can exhibit the quantum effect in transport properties, which are very different from those of carbon fibers. In the present paper, preparation and properties of nanocarbons, con-sisting of something tailor-made carbon hexagonal networks, are demonstrated.抄録全体を表示PDF形式でダウンロード (8529K) -
持田 動2001 年 2001 巻 200 号 p. 206-216
発行日: 2001/12/20
公開日: 2010/06/28
ジャーナル フリーStructural concepts of carbon materials arc riviewed from molecular. nano, meso and micro-scopic views, picking mesophase pitch/ graphite fiber including nanofiber as models of carbon in order to understand the carbon and design the materials of better performance. The graphitic materials are viewed on the structural units of hexagon plane. graphite crystal, nano, meso and micro-scopic units. Mesophase pitch as a precursor of graphite fiber was viewed on the same concepts to correlate the structures of the starting and product materials and to control the structure of the graphite fiber. Glassy and active carbons were also viewed from the same standpoints of structural concepts to expand their properties. Structures of nano phased materials of particle and fiber forms were also elucidated.抄録全体を表示PDF形式でダウンロード (15128K) -
第2報藤本 宏之2001 年 2001 巻 200 号 p. 243-248
発行日: 2001/12/20
公開日: 2010/06/28
ジャーナル フリーThe analysis method proposed by Diamond for estimating the carbon layer size distribution was improved by considering the coherent scattering from the hetero atoms and methylene bridges and incoherent scattering, and mesocarbon microbeads heat-treated at several temperatures were analyzed by the method. The fitting accuracy of 11 band by the least square method was fairly improved compared with that previously reported. However, the obtained size distribution by the method differed from that estimated from the TEM observation. The TEM observation showed that the carbon layer plane is not planar but zigzag in the earlier stage of carbonization. Since the 11 band is an in-plane reflection, the reflection is caused only by the unit of planar part in the zigzag layer plane. Hence, the estimated size of carbon layer plane is apparently smaller than that of real plane observed by TEM. As a result, the H/C atomic ratio calculated from the Diamond's method become larger than that from elemental analysis.抄録全体を表示PDF形式でダウンロード (2173K) -
今西 隆男, 安江 博明, 坂輪 光弘2001 年 2001 巻 200 号 p. 249-254
発行日: 2001/12/20
公開日: 2010/06/28
ジャーナル フリーThe authors have investigated characteristics of charcoal made from used paper and mycelial growth in this charcoal, in order to utilize used paper as medium material of the basidiomycetes. The pH of the charcoal increased with carbonization temperature, which was lower than that of charcoal made from wood at the same temperature. Charcoal with the pH favorable for the basidiomycetes growth was obtained easily. The mycelial extension of Pleuroutus ostreatus in charcoal was the most remarkable at pH 6.0 which was suitable for growth of mycelium. When the bulk density of charcoal was 0.15g/cm3, the radius of 80% of the pores were in the range from 1μm to 100μm, the size of which was suitable for the mycelial growth. High moisture rate was necessary for mycelial extension of Pleuroutus ostreatus in charcoal than in sawdust. It has been proved that Pleuroutus ostreatus grows up well in charcoal made from used paper.抄録全体を表示PDF形式でダウンロード (932K) -
成 蚊圭, 佐々 健介, 井上 邦彦, 小川 博靖, 堂山 昌男, 山田 恵彦, 浅井 滋生2001 年 2001 巻 200 号 p. 255-260
発行日: 2001/12/20
公開日: 2010/06/28
ジャーナル フリーCarbon fibers produced from PAN (polyacrylonitrile) as a precursor are generally subjected to the three heat treatment processes of stabilization and carbonization followed by graphitization. The fibers that had been stabilized in the first process were carbonized in a high magnetic field imposed parallel to fiber axis at the temperature of 1445K and graphitized without magnetic field at 2273K. The tensile strength of these treated fibers was increased in 15-31% in comparison with that of the fibers treated in no magnetic field. The reason why the imposition of the magnetic field could improve the strength of fibers has been studied through the methods such as a microscopic observation of fiber surfaces, a statistical Weibull analysis, an X-ray diffraction and a Raman spectroscopy. By using of the observed and measured results, the mechanism of strengthening of PAN-based carbon fibers by imposing the high magnetic field has been discussed on the basis of an intermolecular cross-linking reaction in terms of a radical pair theory in a magnetic field.抄録全体を表示PDF形式でダウンロード (929K) -
これまでの実験や理論・シミュレーション, そして今後の展望折茂 慎一, 松島 智善, 藤井 博信2001 年 2001 巻 200 号 p. 261-268
発行日: 2001/12/20
公開日: 2011/07/05
ジャーナル フリーIn this review, we first summarize recent experimental and theoretical/simulation researches on various carbon-related materials for hydrogen storage functions. Based on these researches, it would be, we propose, indispensable to design weakly chemisorbed (bonded) sites for atomistic hydrogen in carbon-related materials for better functions. Actually, the mechanically prepared nanostructured graphite is reported to exhibit the notable hydrogen storage functions, probably due to the formation of weakly chemisorbed (bonded) sites. Potential activities of carbon-related materials for hydrogen storage functions are critically, but still positively, described in the review.抄録全体を表示PDF形式でダウンロード (1351K) -
水谷 保男2001 年 2001 巻 200 号 p. 269
発行日: 2001/12/20
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (1554K) -
炭素繊維の直径はどれくらいまで細くできるのですか?また, 細い炭素繊維は空気中に浮遊した場合, 大気汚染などと関係しますか?2001 年 2001 巻 200 号 p. 271
発行日: 2001/12/20
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (202K)
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