Heats of immersion in I-butanol at 25 °C, have been measured for $\alpha-Fe_{2}O_{3}$ with a specific surface area 8.87 m2/g, and for five commercial micronized pigments of the same chemical composition with specific surface areas ranging between 5.80 and 14.80 m2/g. The samples were outgassed under vacuum (10-5 torr) for 4 hr in the temperature range 100-500 °C. An increase of the heat of immersion as a function of the outgassing temperature and the particle size was observed. The results have been analyzed and discussed in relation to structural characteristics of the surfaces.
Referenze Bibliografiche
[1] G. S. YOUNG e T. P. BURSH (1960) - «J. Colloid Sci.», 15, 361.
[2] W. H. WADE e N. HACKERMAN (1960) - «J. Phys. Chem.», 64, 1196.
[3] W. H. WADE e N. HACKERMAN (1961) - «J. Phys. Chem.», 65, 1681.
[4] F. H. HEALEY, J. J. CHESSICK e A. V. FRAIOLI (1956) - «J. Phys. Chem.», 60, 1001.
[5] F. H. HEALEY, J. J. CHESSICK, A. C. ZETTLEMOYER e G. J. YOUNG (1954) - «J. Phys. Chem.», 58, 887.
[6] W. H. WADE e N. HACKERMAN (1964) - In «Contact Angle Wettability and Adhesion», Advan. Chem. Ser. n. 43, 222, Ed. Robert F. Gould, Am. Chem. Soc. Appl. Publications.
[7] A. V. KISELEV, K. G. KRASIL'NIKOV e V. V. MURINA (1960) - «Doklady Akad Nauk, S.S.S.R.», 130, 569.
[8] M. LAFFITTE e J. ROUQUEROL (1970) - «Bull. Soc. Chim. Fr.», 3335.
[9] C. LÉTOQUART, F. ROUQUEROL e J. ROUQUEROL (1973) - «J. Chim. Phys.», 559.
[10] E. CALVET e H. PRAT (1956) - In «Microcalorimétrie. Applications Physico-Chimiques et Biologiques». Ed. Masson, Paris.
[11] E. CALVET e H. PRAT (1963) - In «Recent Progress in Microcalorimetry». Ed. H. A. Skinner. Pergamon Press, Oxford.
[12] C. M. HOLLABAUGH e J. J. CHESSICK (1961) - «J. Phys. Chem.», 65, 109.
[13] H. COCHRANE e R. RUDHAM (1965) - «Trans Faraday Soc.», 61, 2246.
[14] T. MORIMOTO, N. KATAYAMA, H. NAONO e M. NAGAO (1969) - «Bull. Chem. Soc. of Japan.» 42, 1490.
Con il contributo del Ministero per i Beni e le Attività Culturali