JAPAN TAPPI JOURNAL
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
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Volume 24, Issue 9
Displaying 1-9 of 9 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1970 Volume 24 Issue 9 Pages 437-444
    Published: September 01, 1970
    Released on J-STAGE: January 22, 2010
    DOIhttps://doi.org/10.2524/jtappij.24.9_437
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1970 Volume 24 Issue 9 Pages 445-459
    Published: September 01, 1970
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.24.9_445
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1970 Volume 24 Issue 9 Pages 459-460
    Published: September 01, 1970
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.24.9_459
    JOURNAL FREE ACCESS
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  • Ion Exchange Equilibrium of Wood Pulp Dispersed in Electrolyte Solution
    Fumihiko Onabe, Junzo Nakano
    1970 Volume 24 Issue 9 Pages 461-466
    Published: September 01, 1970
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.24.9_461
    JOURNAL FREE ACCESS
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    In the system containing wood pulp and electrolyte solution, pulp behaves as weak acidic H-type cation exchanger owing to the presence of carboxyl groups. Investigation on the adsorption properties of pulp was carried out by the application of Donnan's membrane equilibrium theory to this system. Assuming that the change of hydrogen ion concentration of external solution after immersion of wood pulp is due to the exchange reaction between metal ion and hydrogen ion at carboxyl group, ion exchange isotherm and selectivity coefficient for ion exchange were obtained.
    Possible mechanism for ion adsorption in this system was discussed on the basis of the following two processes : (1) ion exchange reaction and (2) salt adsorption by forming ion pair. Concentration range covered were 1×10-51N. At lower concentration, ion exchange reaction primarily seems to occur and follows the isotherm of Freundlich type. On the other hand, at higher concentration, ion adsorption does not follow this isotherm. This is possibly due to the additional adsorption of ion by salt adsorption process at higher concentration. In this system hydrogen ion was liberated into external solution by ion exchange, but the simultaneous adsorption of hydrogen ion onto pulp surface also takes place. Change in accessibility of wood pulp without altering the amount of carboxyl group also affects the ion exchange equilibrium.
    At the present stage, because of insufficient establishment of the theory concerning the behavior of ion in concentrated electrolyte solution, the problem of ion adsorption to wood pulp in electrolyte solution of the range of higher concentration is left for future study.
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  • On the Gel-formation of Polyuronide and Lignosulfonate Solutions by Adding Metal Salts
    Hisao Ishikawa, Katsumi Okubo, Tae Oki
    1970 Volume 24 Issue 9 Pages 467-473
    Published: September 01, 1970
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.24.9_467
    JOURNAL FREE ACCESS
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    Some observations were made about the effect of metal salts on the gel-formation of alginate and lignosulfonate solutions.
    When the concentration solutions of calcium and sodium-lignosulfonate were converted to the each gel solution by reacting with K2Cr2O7, under an acetic acid-acidified condition, the rotational viscosity and the structrual viscosity value (n-value) of the lignosulfonate solutions increased rapidly, as well as the gel-formation of a sodium alginate solution with calcium chloride. The change of the rotational viscosity of an alginate-calcium chloride gel or lignosulfonate gel solution by heating or cooling in the range of 5°C to 93°C was inreversible. From the above results, it was difficult to find out the difference of the static viscosity between the solutions of ionic gel of alginate and lignosulfonate gel.
    The viscoelasticity of the “Tororo-aoi” mucin and the above two gel solutions was measured by a hysteresis loop method. The results indicated that the mucin and lignosulfonate gel solutions have linear viscoelasticity, while an ionic gel solution of alginate having non-linear viscoelasticity.
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  • [title in Japanese]
    [in Japanese]
    1970 Volume 24 Issue 9 Pages 474-476
    Published: September 01, 1970
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.24.9_474
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  • [title in Japanese]
    [in Japanese]
    1970 Volume 24 Issue 9 Pages 477-482
    Published: September 01, 1970
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.24.9_477
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  • Studies on the Mucilaginous Material in Manufacture of Machine Made Japanese Paper
    Part 2 Investigations on Web Fomability of Mucilaginous Material
    Paper Manufacture Section
    1970 Volume 24 Issue 9 Pages 483-490
    Published: September 01, 1970
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.24.9_483
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1970 Volume 24 Issue 9 Pages 491-493
    Published: September 01, 1970
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.24.9_491
    JOURNAL FREE ACCESS
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