Clay minerals in the Amakusa pottery stones and some features of their pottery clays. (II) Surface charge of sericite and dispersion-coagulation properties of pottery clay in water.:Surface Charge of Sericite and Dispersion-Coagulation Properties of Potte
スポンサーリンク
概要
- 論文の詳細を見る
Two kinds of pottery clays (TS-1, TS-2) have been prep ared by pulverizing Amakusa pottery stone and two sorts of sericites (5-1, S-2) by elutriating the two pottery clays, respectively. Dispersion and coagulation properties of suspended pottery clays (TS-1, TS-2) and surface charge of sericites (5-1, S-2) have been studied as a function of pH on the basis of the data for zeta potential and the DLVO theory.<BR>Two kinds of sericites showed almost the same value of zeta potential in high pH region, however, the values of 5-1 were smaller than those of S-2 at pH below 7. Surface potential, Stern layer and Guoy layer charges of S-1 and S-2 were calculated on the assumption that the edge potential was + 2 mV at pH 7. The surface potentials of S-1 and S-2 were-74 mV and-60 mV, respectively.<BR>In the coagulation series tests, sediments in coagulated suspensions of TS-1 were more voluminous than those of TS-2 of the same solid concentration under the conditions of pH below 7 or above 12. The difference between the structures of both sediments in coagulated suspensions was analyzed by the DLVO theory including the particle size effects. It was difficult to consider that three types of association (face-to-face, face-toedge, edge-to-edge) occurred simultaneously or to the same extent, when a suspention of very thin plate-like clay minerals coagulated in water. At the early stage of coagulation, edge-to-edge association was considered to play an important role in determining the structure of sediments because a potential energy barrier of edge-to-edge association in case of the very thin particles became much lower than the average kinetic energy of particles (15kt). It was therefore concluded that thin particles exhibited voluminous coagulation than thicker particles.
- 日本粘土学会の論文
日本粘土学会 | 論文
- 23.エトリンガイト生成反応を利用する土質安定方法
- 高レベル放射性廃棄物地層処分におけるベントナイト緩衝材変質現象に関する最近の研究と今後の研究展開
- P13 断層粘土の脱水反応と摩擦強度の変化
- B16 抗がん剤/層状複水酸化物ナノ複合体の合成とその細胞毒性(口頭発表,一般講演)
- A19 ペプチド修飾を施した5-フルオロウラシル/層状複水酸化物複合体の合成とその細胞輸送効率(口頭発表,一般講演)