懸濁粒子の沈積状態に関する物理化学的研究(第2報)沈積層の異方性に対する一次粒子半径の影饗

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Porosity (ε) and tortuosity (q) of sedimentation beds were measured for aqueous suspension of yarious powders, (glass beads, sea sand, chloramphenicol, griseofulvin, and alumina) which had been dispersed in polivinylpyrolidone (PVP) and carboxymethylcellose natrium (CMC-Na) solutions. The primary (γ_0) and secondary (γ_m) particle radius were also measured. The ratio of vertical and horizontal q values, q_V/q_H, is a parameter that represents the anisotropy of the sedimentation bed. According to the relations ε vs. q_V/q_H and q_V/q_H vs. γ_m/γ_0,the sedimentation states of particles in bed were discussed. The sedimentation states of perticles show a different tendency depending on the primary particle radius (γ_0).In the case of large γ_0,the bed approaches isotropy with the growth of scafford structure. On the other hand, when γ_0 is small, the bed becomes more anisotropic due to the formation of secondary particles of nonspherical shape.
公益社団法人日本薬学会の論文
1974-02-25