CMCナトリウム塩の酸化アルミニウムに対する分散作用に関する研究

概要

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Dispersion action of soduim carboxymethyl cellulose (CMC) against alumina was examined by the measurement of sedimentation volume, sedimentation velocity, and filtration rate. Two fractions of different particle radius obtained by levigation of alumina were used as the samples. It was thereby found that maximum flocculation occurs at around 0.03% concentration of sodium-CMC, and that this phenomenon transited to the dispersed state with increase in the concentration. It was also found that the concentration showing maximum flocculation was higher with smaller particle radius. Radius (R) and internal porosity (ε) of secondary particles, and porosity (ε') between secondary particles in the sedimentation bed were calculated, and a method for knowing the flocculation state of primary and secondary particles was explained. Then the values of R, ε, and ε' were calculated from the result of present measurements and it was found that the flocculation power of the primary particles was larger than that of secondary particles, and that the dispersion and flocculation action of sodium-CMC is not to change this flocculation power of alumina particles but changes the radius of secondary particles.
公益社団法人日本薬学会の論文
1968-11-25