特集-高圧力と材料開発- Rev. High Pressure Sci. Technol. 6-2,86-93(1997) |
超臨界流体を反応場とする物質変換 Supercritical Fluids as Novel Media for Chemical Reactions |
生島 豊 Yutaka IKUSHIMA |
Two molecular aggregates, an enzyme and micelle,
in supercritical fluids have been studied
with respect to their microstructures and
activity for chemical reactions. Ester syntheses
catalyzed by a lipase have been carried out
in supercritical carbon dioxide. In the near-critical
region, the rate showed a sharp maximum and
(S)-(-)-terpene esters were stereoselectively
synthesized from acyl donors and a primary
alcohol. The structure of an enzyme and interactions
between carbon dioxide and enzyme molecules
have been examined by using in situ FTIR and gravimetry. The alkaline fading
of crystal violet (CV) is accelerated by
using a W/O microemulsion of H2O/AOT/ethane under supercritical conditions.
The structure of AOT molecules and the type
of interior water molecules may account for
the rate enhancement. [supercritical fluids, lipase, estenification, FTIR, AOT micelles, reverse microemulsion, alkaline fading] |
〒983-8551 仙台市宮城野区苦竹 4-2-1 東北工業技術研究所機能化学部反応化学研究室 National Industrial Research Institute of Tohoku, 4-2-1 Nigatake, Miyagino-ku, Sendai 983-8551 |
特集-高圧力と材料開発- Rev. High Pressure Sci. Technol. 6-2,94-101(1997) |
熱水条件下での無機材料合成 Synthesis of Inorganic Materials under Solvothermal Conditions |
佐藤 次雄 Tsugio SATO |
Recent advances in the synthesis of inorganic
materials by the solvothermal reactions
using
high temperature and high pressure
aqueous
and/or nonaqueous solvents were reviewed.
Especially, the formation of monodispersed
particles, single crystals and thin
films
by the solvothermal reactions using
metal
chelate precursors and/or concentrated
gel
precursors were introduced. The control
of
the powder agglomeration using nonaqueous
solvents followed by supercritical
drying
was also introduced. [ Solvothermal reaction, monodispersed particle, single crystal, thin film, agglomeration, nonaqeous solvents, supercritical drying] |
〒980-8577 仙台市青葉区片平 2-1-1 東北大学反応化学研究所 Institute for Chemical Reaction Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577 |
特集-高圧力と材料開発- Rev. High Pressure Sci. Technol. 6-2,102-108(1997) |
遷移金属-メタロイド系化合物の高圧合成 High-Pressure Synthesis of Intermetallic Compounds in Transition Metal-Metalloid Systems |
滝沢 博胤 Hirotsugu TAKIZAWA |
New intermetallic compounds synthesized under
high pressure condition are reviewed. These
include borides, silicides, phosphides, chalcogenides,
germanides, and antimonides in various transition
metal-metalloid systems. The characteristics
of high-pressure synthesis are summarized
and classified into three typical groups:
1.Pressure-induced phase transitions of ambient
pressure phases, 2. Compound formations with
new chemical compositions, and 3. Control
of decomposition and/or sublimation of reactants.
The various examples demonstrate that high-pressure
synthesis is a powerful tool for developing
new functional materials. [high-pressure synthesis, intermetallic compounds, transition metal, phase transition, crystal chemistry] |
〒980-8579 仙台市青葉区荒巻字青葉07 東北大学大学院工学研究科材料化学専攻 Department of Materials Chemistry, Graduate School of Engineering, Tohoku University, Aoba-ku, Sendai 980-8579 |
特集-高圧力と材料開発- Rev. High Pressure Sci. Technol. 6-2,109-114(1997) |
半導体及び超伝導体の高圧合成と物性 Electrical Properties of Semiconductors and Superconductors Prepared at High Pressure |
城谷 一民 Ichimin SHIROTANI |
Using a wedge-type cubic anvil high pressure
apparatus, metal-IVA and -VA group compounds
have systematically been prepared at high
temperatures and high pressures. In this
paper we mainly report the electrical properties
of the compounds with skutterudite(CoAs3-type) structure prepared at high pressure.
CoP3 and CeRu4P12 behave as a semiconductor. NiP3 is a metal. LaRu4P12 is a superconductor with Tc of 7 K. The electrical resistivity of alloys
La1-xCexRu4P12 rapidly increases with increasing x. The
metal to semiconductor transition is observed
at around X= 0.6. PrRu4P12 shows the electrical anomaly due to the
metal-insulator transition at around 60 K.
The Tc's of new superconductors LaRu4As12 and LaRu4Sb12 are 10.3 K and 2.8 K, respectively. LaRu4As12 has the highest Tc in the skutterudite compounds. PrRu4As12 is an interesting superconductor containing
the magnetic rare earth with Tc of 2.5 K though PrRu4P12 behaves as the semiconductor below 60 K.
We have found the new compound superconductors, ZrRuSi, ZrRuGe, ZrRu4P12, LaRu4As12 and ZrRhSi, with Tc of above 10 K in metal-IVA and -VA group compounds prepared at high pressure. [semiconductor, superconductivity, new superconductor, high pressure synthesis, skutterudite structure, metal pnictide, metal silicide] |
〒050-8585 室蘭市水元町27-1 室蘭工業大学工学部電気電子工学 Muroran Institute of Technology, 27-1 Mizumoto-cho, Muroran-shi 050-8585 |
論文 Rev. High Pressure Sci. Technol. 6-2,115-119(1997) |
超臨界二酸化炭素を用いたポリマーブレンドの微小分相構造の制御 A New Control Technique of Percolated Structure of Polymer Blend Using Supercritical Carbon Dioxide |
三島 健司・江澤 雅久・円城寺 隆志・岡 聡・松山
清・長谷 昌紀 Kenji MISHIMA Masahisa EZAWA Takashi ENJOUJI Satoru OKA Kiyoshi MATSUYAMA Masanori NAGATANI |
A New formation control technique of percolated
structure of polystyrene-polybutadiene polymer
blend was developed by using supercritical(SC)
carbon dioxide solution containing organic
solvent, such as benzene, toluene, or p-xylene.
During the solvent casting process, the SC
fluid mixtures which have large diffusivity
were used as a solvent for the polymer blend
under the conditions of 20 MPa and 308.15
K. The periodic distance of the percolated
structure was measured during the casting
process by the laser-light scattering method.
And the produced structure of polymer blend
was observed by an optical microscope. A
closed percolated structure of polymer blend
was formed in the SC fluid process. [supercritical fluid, polymer blend , percolated structure, benzene, toluene, p-xylene, CO2, polystyrene, polybutadiene ] |
〒814-0180 福岡市城南区七隈 8-19-1 福岡大学工学部化学工学科 Department of Chemical Engineering, Faculty of Engineering, Fukuoka University, 8-19-1 Nanakuma, Jyonanku, Fukuoka 814-0180 |
解説 Rev. High Pressure Sci. Technol. 6-2,120-127(1997) |
PRESENT STATUS OF HIGH PRESSURE RESEARCH IN FRANCE |
Bernard Le Neindre |
In this paper we have summarized some of
the main research programs carried out on
high pressure in France. If more details
are required on a specific subject, they
can be obtained by writing to the experts
working in the concerned field. [high pressure, physics, chemistry, biology] |
LIMHP-CNRS, Institut Galiee, Universite Paris
Nord, Avenue Jean-Baptiste Clement 93430-VILLETANEUSE, FRANCE |
サロン Rev. High Pressure Sci. Technol. 6-2,128-131(1997) |
高圧食品開発物語(その1) Story of Development of High-Pressure Processed Foods, Part 1 |
山崎 彬 Akira YAMAZAKI |
Recently, research interest is concentrated
on the use of high pressure for food
processing
and a successful story example is reviewed
here. This report introduces various
types
of high-pressure processed food products,
and gives the inside story of the course
of this development and processing
in our
factory. The applicability of high
pressure
for the development of new foods for
the
future is also suggested. [high-pressure processed foods,food processing,new foods] |
〒940-0056 長岡市呉服町1-4-5 越後製菓(株)総合研究所社長室 Research Institute, Echigo Seika Co.,Ltd.,1-4-5 Gohuku-cho Nagaoka-shi 940-0056 |
〒606-0805
京都市左京区下鴨森本町 15 (財)生産開発科学研究所内
日本高圧力学会事務局
Tel (075)721-0376 Fax (075)723-9629
koatsu@mbox.kyoto-inet.or.jp