Journal of the Japan Society of Colour Material
Online ISSN : 1883-2199
Print ISSN : 0010-180X
ISSN-L : 0010-180X
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Volume 68, Issue 2
Displaying 1-7 of 7 articles from this issue
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  • Studies on Phthalocyanine Type Compounds (Part 12)
    The Solvent Treatment of Cobalt Phthalocyanine and Its Pyridine Adduct
    Keiichi SAKAMOTO
    1995 Volume 68 Issue 2 Pages 67-74
    Published: 1995
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.68.67
    JOURNAL FREE ACCESS
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    The crystals of cobalt phthalocyanine (Co-PC) after treated with an organic solvent under high-pressure hydrogen were studied. The Q-bands on the visible absorption spectra of Co-PCs had hardly shifted after the treatment with aromatic or alcohol solvent. However, the X-ray diffraction patterns and the Q-bands on the electron spectra of Co-PCs had changed after a pyridine treatment under high-pressure hydrogen. Co-PCs had formed pyridine adducts, which were confirmed with the change in the X-ray diffraction pattern and the shift of Q-bands. The molecular structure of the pyridine addition compounds depends on the treatment temperature. These results were supported by X-ray photoelectron spectra and ζ potentials.
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  • Size Control of Uniform Spherical Cobalt Phosphate Particles and Their Adsorptive Properties
    Kazuhiko KANDON, Eiji MATSUDA, Akemi YASUKAWA, Tatsuo ISHIKAWA
    1995 Volume 68 Issue 2 Pages 75-82
    Published: February 20, 1995
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.68.75
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    The preparation of uniform spherical cobalt phosphate particles by the aging of a solution containing CoSO4 and NaH2PO4 at 80°C in the presence of urea and surfactant has been investigated and their properties were characterized by various means. The anionic (sodium dodecylsulfate, SDS), cationic (cetyltrimethylammonium chloride, CTAC), and nonionic (polyoxyethylene (20) nonylphenyl ether, NP-20) surfactants were employed for the investigation. The highly uniform spherical cobalt phosphate particles were obtained under the following condition : [CoSO4] =5 mmol/dm3, [NaH2Pa4] =5 mmol/dm3, [urea] =1 mol/dm3, and [surfactants] =0-50 mmol/dm3. The particle size was obviously changed depending on the surfactant used. The average diameter of the spherical particles was found to change from 400 to 1700 nm, froth 200 to 1700 nm, and from 1100 to 1700 nm for SDS, CTAC, and NP-20 systems, respectively. The particles produced at 4 mmol/dm3 SDS exhibited a high selective adsorption of H2O. This fact was explained by the molecular sieve effect of the slit-shaped layer structure. This selective adsorption of H2O was further pronounced by the particels prepared at above 20 mmol/dm3 SDS because of the adsorption of H2O into the interstices of fine primary particles in addition to the molecular sieve effect. A similar result was observed for the CTAC system.
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  • Adsolubilization of 2-Naphthol into Polymer-Surfactant Adsorbed Layer on Alumina
    Kunio ESUMI, Kanako MIZUNO, Yoko YAMANAKA
    1995 Volume 68 Issue 2 Pages 83-86
    Published: February 20, 1995
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.68.83
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    Adsolubilization of 2-naphthol in polymer-surfactant adsorbed layer on alumina has been studied, Two systems were explored : poly (vinylpyrrolidone) (PVP) -sodium bis (2-ethylhexyl) sulfosuccinate (Aerosol OT) and PVP-sodium dodecylsulfate (SDS). Under a constant feed concentration of PVP, the adsolubilized amounts of 2-naphthol increased sharply at low surfactant concentration, reached a maximum and then decreased with the surfactant concentration. This sharp increment in the adsolubilization is attributed to a formation of complex between PVP and surfactant on alumina. The maximum adsolubilized amounts of 2-naphthol in the two systems were nearly identical.
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  • Scanning Vibrating Electrode Technique
    Tadashi SHINOHARA
    1995 Volume 68 Issue 2 Pages 87-92
    Published: February 20, 1995
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.68.87
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  • Novel Electroactive Energy-Strage Polymer Materials and Their Electrochemical Characterizations
    Katsuhiko NAOI, Yasushi OURA
    1995 Volume 68 Issue 2 Pages 93-103
    Published: February 20, 1995
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.68.93
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  • Glass Transition Temperature and Free Volume (II)
    Toshihiko NAKAMICHI
    1995 Volume 68 Issue 2 Pages 104-112
    Published: February 20, 1995
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.68.104
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  • Introduction to Solid Surface Design
    Seisiô Itô
    1995 Volume 68 Issue 2 Pages 113-121
    Published: February 20, 1995
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.68.113
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