アロフェン及びイモゴライトの凍結乾燥粘土と風乾粘土の水蒸気吸着
1978 年 18 巻 2 号 p. 63-67
詳細
1978 年 18 巻 2 号 p. 63-67
Surface properties between freeze-dried and air-dried clays were compared. Allophane and imogolite clays (<2μEm) were leached with 1M NaC1 and washed with or dialyzed against water. One part of these clays was freeze-dried and the other part air-dried. Water vapor adsorption and EGME and N2 surface-areas of both freeze-dried and airdried clays were measured.
The amounts of water vapor adsorbed at relative humidities of from 0.15 to 0.79 and EGME and N2 specific-surface-areas of freeze-dried and air-dried clays were almost the same with each other. The difference was only found at the amounts of water vapor adsorbed at a relative humidity of 0.93, which were larger for freeze-dried clays than for air-dried ones, especially for allophane. This difference was interpreted in terms of the difference in the interaggregate porosity between freeze-dried and air-dried clays.
