Influence of surfactant structure on wettability modification of hydrophobic granular surfaces

Journal Article · Sat Oct 01 04:00:00 EDT 1994 · Journal of Colloid and Interface Science; (United States)

DOI:https://doi.org/10.1006/jcis.1994.1350· OSTI ID:6993112

Varadaraj, R; Bock, J; Brons, N; Zushma, S ^[1]

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1. Exxon Research and Engineering Co., Annandale, NJ (United States)

Using the capillary penetration wetting technique, the influence of surfactant structure on wettability modification of hydrophobic granular surfaces was examined. Linear and branched hydrocarbon chain sulfates, 5 mol monodisperse ethoxylates and 5 mol monodisperse ethoxysulfates were used as surfactants and resin-coated sand as the hydrophobic granular surface. Both the surfactant type and hydrocarbon chain branching were observed to exert a significant influence on the rate and effectiveness of wetting. Wetting rates for ethoxylates > sulfates > ethoxysulfates. Wetting effectiveness for sulfates > ethoxylates. For a given surfactant type, hydrocarbon chain branching was observed to increase wetting rate and effectiveness.

• OSTI ID: 6993112
• Journal Information: Journal of Colloid and Interface Science; (United States), Journal Name: Journal of Colloid and Interface Science; (United States) Vol. 167:1; ISSN 0021-9797; ISSN JCISA5
• Country of Publication: United States
• Language: English

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GRANULAR MATERIALS
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