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Volume 68, Issue 3
Displaying 1-5 of 5 articles from this issue
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Masahiko ABE, Kenichi KOSAKA, Keiichi YOSHIHARA, Keizo OGINO, Koichi S ...1995 Volume 68 Issue 3 Pages 135-141
Published: March 20, 1995
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSProperties and stabilities of W/O-type emulsions with various surfactants and oils derived from oleic acid have been investigated in terms of interfacial tension, particle size, and viscosity.
The stability of the emulsion was dependent upon the adding order of chemicals. It was also dependent upon alkyl chain length in oil, purity, and mixed HLB (Hydrophilic-Lipophilic Balance) number of the surfactants used. The depression of the interfacial tension was larger when higher purity of surfactant was used. It was found that the stability of the W/O-type emulsion possessing a rheopexy behavior is better than that showing thixotropy behavior.View full abstractDownload PDF (1362K) -
Surface Activation of Acryl-styrene Polymer Powder by Alkali Hydrolysis Treatment and Cobalt CoatingKeiji MINAMIHASHI, Seisirô ITÔ1995 Volume 68 Issue 3 Pages 142-148
Published: March 20, 1995
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSAlkali hydrolysis treatment as a surface activation method of fine particles of cross-linked acryl-styrene polymer and the cobalt coating of their surfaces were investigated. Monodispersed and cross-linked spherical acryl-styrene polymer particles were used as the fine polymer particles.
By the alkali hydrolysis treatment, carboxyl groups were introduced on the surface of the polymer particles to activate them. After being heated and refluxed in diphenyl ether solution with tris (acetylacetonato) cobalt (III) ((Co (acac) 3)) and sodium tetrahydroborate, the alkali-hydrolysis-treated polymer powders were covered with cobalt. The most suitable amounts of (Co (acac) 3) and sodium tetrahydroborate were 1.0×10-3 and 1.0×10-2mol per 0.5/ m2 of the alkalihydrolysis-treated polymer powders, respectively.View full abstractDownload PDF (955K) -
Yoshikazu HIRANO, Tomomichi OKANO, Sumihiko MURATA, Shigeyuki URABE, M ...1995 Volume 68 Issue 3 Pages 149-155
Published: March 20, 1995
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSThe effects of fatty acid and alcohol portions in sodium 2-sulfonatofatty acid higher alkyl esters (α-SF) on the preparation and properties of quaternary microemulsion systems were investigated in terms of solubilization parameter, optimum salinity, and so on.
The α-SF always needed the addition of a hydrophilic alcohol to form a middle-phase microemulsion because of its strong hydrophobicity. The solubilization parameter and optimum salinity for the formation of the middlephase microemulsion were dependent upon the total hydrophobic chain length and difference between two hydrophobic chain lengths in the α-SF molecules. As the total hydrophobic chain length increased, the solubilization parameter increased but the optimum salinity decreased. At the same total hydrophobic chain length, the α-SF possessing a small difference between two hydrophobic chains enhanced the solubilization parameter considerably.View full abstractDownload PDF (830K) -
Toshihiko NAKAMICHI1995 Volume 68 Issue 3 Pages 156-164
Published: March 20, 1995
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSDownload PDF (694K) -
Yasuaki OKAMOTO1995 Volume 68 Issue 3 Pages 165-176
Published: March 20, 1995
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSDownload PDF (1260K)
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