Journal of the Clay Science Society of Japan (in Japanese)
Online ISSN : 2186-3563
Print ISSN : 0470-6455
ISSN-L : 0470-6455
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Volume 36, Issue 4
Displaying 1-5 of 5 articles from this issue
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  • Adsorption of Molecules with Different Shapes on Alumina-pillared Montmorillonite with Different Amount of Pillar
    Chihiro OOKA, Toshihiko OSAKI, Masakazu HORIO, Kenzi SUZUKI
    1996 Volume 36 Issue 4 Pages 175-179
    Published: March 31, 1996
    Released on J-STAGE: September 20, 2011
    DOIhttps://doi.org/10.11362/jcssjnendokagaku1961.36.175
    JOURNAL FREE ACCESS
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    Some molecules such as Pyridinum Chorolide (PC), Methylene Blue (MB) and Victoria Pure Blue (VPB) were adsorbed on Alumina-pillared montmorillonite intercalated with different amount of pillar. The pillared montmorillonite was dispersed in adsorbate solution and then incubated at room temperature for 3days. The amount of the obtained adsorbate in the pillared montmorillonite increased with increasing distance between pillars and with decreasing molecular size, that is, VPB> MB> PC.
    In this study, it was ovserved that the amount of adsorbate in the pillared montmorillonite is controlled by both molecular sizes of adsorbates, and the distance between pillars.
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  • Synthesis of Mesoporous Aluminum Silicate (Al-FSM)
    Yoshie KITAYAMA, Hitosi ASANO, Yosinobu ANZAI, Tatsuya KODAMA, Yoshimi ...
    1996 Volume 36 Issue 4 Pages 180-187
    Published: March 31, 1996
    Released on J-STAGE: September 20, 2011
    DOIhttps://doi.org/10.11362/jcssjnendokagaku1961.36.180
    JOURNAL FREE ACCESS
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    The synthesis of mesoporous aluminum-silicate analogues to FSM-16 (Al-FSM) was reported. Mixtures containing various component of water glass, Al (NO3) 3 and NaOH were used as starting materials. The reactant was calcined at 973K (step 1). The resulting material was suspended in water for 3 hours to exchange Na+ and then dried (step 2). The obtained material was suspended in the hexadecyltrimethylammonium chloride aqueous solution to form a complex of layered silicate and surfactant (step 3). The obtained complex was calcined to decompose the surfactant and to obtain Al-FSM-16 (step 4). In both steps 1 and 2, layered silicates of various types were formed in the products. When tetrahedral Al sites were formed in either step 1 and step 2, it clearly showed that the Al ions in the products were incorporated into the frame of FSM-16. On the other hand, the absence of tetrahedral Al formation gave a significant amount of octahedral Al in addition to tetrahedral Al in the Al-FSM samples. corresponding The formation of tetrahedral Al in step 1 or step 2 therefore plays an important role incorporating Al into the framework of FSM-16. The Al content in Al-FSM samples increased with a corresponding increase of Al content in the starting material. The FT-IR, 27Al and 29Si MAS NMR results also suggest that Al is incorporated in the framework of FSM-16.
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  • Water Vapor Adsorption Properties of Mesoporous Materials by Selective Leaching of Chinese Kaolinitic-Clays
    Masaki MAEDA, XIN JIANG Wang, Fumihiko OHASHI, Shinji TOMURA, Kiyoshi ...
    1996 Volume 36 Issue 4 Pages 188-195
    Published: March 31, 1996
    Released on J-STAGE: September 20, 2011
    DOIhttps://doi.org/10.11362/jcssjnendokagaku1961.36.188
    JOURNAL FREE ACCESS
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    To develop a humidity self-controlling material, mesoporous clay samples have been prepared through selective leaching of calcined Chinese kaolinitic-clays (Suzou-Kaolin, Coal-Kaolin and Black Clay). These samples were calcined for 1 hour at 900°C, 1000°C, and 1100°C. Each 100g of the calcined samples was suspended in 500ml of 1N KOH solution for 24 hours at 90°C. The mesoporous clay materials obtained from Suzou-Kaolin and Coal-Kaolin showed a very narrow pore size distribution at around 20-30Å in pore radius and with the specific surface areas at around 90m2/g and 70m2/g. The total pore volumes were 0.20m1/g for Suzou-Kaolin and 0.12m1/g for Coal-Kaolin, respectively. The water vapor adsorption isotherms showed a rapid increase at relative humidity (RH) of about 60%. The amount of water vapor adsorption at RH=90% for the same samples were 14mass% and llmass%, respectively. On the other hand, Black-Clay which contains small amount of impurity iron, alkali and alkaline earth elements, showed a gradual increase in water vapor adsorption up to RH=90%. From the results of water vapor adsorption and desorption measurements, the mesoporous materials prepared through selective leaching of silica from calcined Chinese kaolinitic clays (SuzouKaolin and Coal-Kaolin) showed good quality samples for humidity self-controlling material.
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  • The Origin of Lamellar Textures Encountered in Concretions and Related Substances (II)-Processes, Mechanisms, Agents
    Toshio SUDO
    1996 Volume 36 Issue 4 Pages 196-209
    Published: March 31, 1996
    Released on J-STAGE: September 20, 2011
    DOIhttps://doi.org/10.11362/jcssjnendokagaku1961.36.196
    JOURNAL FREE ACCESS
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  • State of the Evaluation of Long-Term Deterioration of Impermeability of Bentonite/Sand Mixture
    Takashi ISHII, Hitoshi NAKASHIMA, Yasuhiro MITANI
    1996 Volume 36 Issue 4 Pages 210-223
    Published: March 31, 1996
    Released on J-STAGE: September 20, 2011
    DOIhttps://doi.org/10.11362/jcssjnendokagaku1961.36.210
    JOURNAL FREE ACCESS
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