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 61, Issue 9
Displaying 1-4 of 4 articles from this issue
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  • Decomposition of Linalool by Pigments in the Presence of Air
    Hiroshi FUKUI, Ryujiro NAMBA, Muneo TANAKA, Motokiyo NAKANO
    1988 Volume 61 Issue 9 Pages 481-487
    Published: September 20, 1988
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.61.481
    JOURNAL FREE ACCESS
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    The reaction between pigments and linalool which is a common component of perfumes was carried out with a microcatalytic reactor in the presence of air at 178°C. The decomposition products were identified by mass spectrometry and infrared spectrometry.
    Linalool was decomposed by the pigments having acidic sites and most of decomposition products were dehydrated linalool such as myrcene, ocimene, alloocimene, limonene, terpinolene which were the same as those of the products in nitrogen. Dehydrated products were formed via a carbonium ion intermediate formed onacidic sites of the pigments.
    In the presence of air, linalool was oxydized by hydrated chromium oxide, yellow iron oxide, prussian blue and cobalt blue which consist of transition elements.
    The oxidation products from linalool were acetone, isoprene, 2-methyl-2-propenal and methyl vinyl ketone.
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  • Control of Particle Size and Pore Volume of Silica Microsphere
    Yoshiko NAKAHARA, Yuuko TANAKA, Yasuko EHARA, Fujiya NAKAHARA
    1988 Volume 61 Issue 9 Pages 488-493
    Published: September 20, 1988
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.61.488
    JOURNAL FREE ACCESS
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    Porous microsphere of silica was prepared by an interfacial reaction method, in which silica particle was formed by the reaction of aqueous solution of sodium silicate emulsified in benzene solution of surfactants with aqueous solution of ammonium sulfate. In addition, preparation conditions for controlling the particle size and pore volume of silica microsphere were studied.
    The particles were prepared under the following constant conditions : concentration of SiO2 and (NH4) 2SO4 were respectively 4.0 mol/l and 1.5 mol/l, surfactant was mixture of Tween-80 and Span-60 in concentration of 21g/l. The W/O ratio was varied from 1/3 to 1/5, and SiO2/Na2O ratio in sodium silicate solution was the range of 1-3, for examining the influence of the W/O ratio and the concentration of SiO2 on particle size and pore volume of the silica microspheres. Properties of particles were determined by the scanning electron microscopic method, particle size distribution, specific surface area, and pore size distribution.
    It was found that the particle size was dependent on the W/O ratio in emulsion, and that the specific surface area, the pore volume and the heat of immersion were decreased with increasing SiO2/Na2O ratio in sodium silicate solution.
    These results suggest that the pore on the silica microsphere was formed by release of Na2O molecules from the droplet of sodium silicate solution of emulsion in the interfacial reaction.
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  • The Natures and Applications of Polymer Particles with Voids
    Kunihide TAKARABE
    1988 Volume 61 Issue 9 Pages 494-508
    Published: September 20, 1988
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.61.494
    JOURNAL FREE ACCESS
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  • Solubility and Miscibility of Resins
    Toyohiko YOSHIDA
    1988 Volume 61 Issue 9 Pages 509-519
    Published: September 20, 1988
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.61.509
    JOURNAL FREE ACCESS
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