Data collection, liquid-solid interfaces

The Wilhelmy hanging plate method (13) has been used for many years to measure interfacial and surface tensions, but with the advent of computer data collection and computer control of dynamic test conditions, its utility has been greatly increased. The dynamic version of the Wilhelmy plate device, in which the liquid phases are in motion relative to a solid phase, has been used in several surface chemistry studies not directly related to the oil industry (14- 16). Fleureau and Dupeyrat (17) have used this technique to study the effects of an electric field on the formation of surfactants at oil/water/rock interfaces. The work presented here is concerned with reservoir wettability. 

This appendix contains tabulations of contact angles of liquids on solids. These data have been collected, starting from a systematic literature review, covering Chem. Abstr., J. Colloid Interface Set, Colloids Surf, Langmuir and Adv. Colloid Interface Set on the basis of key words, where avadlable. In places the data have been extended by additional entrees, without attempting to achieve completeness. 

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