Surfactants at the Design Limit

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• 作者：Adam Czajka ; Gavin Hazell ; Julian Eastoe
• 刊名：Langmuir
• 出版年：2015
• 出版时间：August 4, 2015
• 年：2015
• 卷：31
• 期：30
• 页码：8205-8217
• 全文大小：670K
• ISSN：1520-5827

文摘

This article analyzes how the individual structural elements of surfactant molecules affect surface properties, in particular, the point of reference defined by the limiting surface tension at the aqueous cmc, 纬_cmc. Particular emphasis is given to how the chemical nature and structure of the hydrophobic tails influence 纬_cmc. By comparing the three different classes of surfactants, fluorocarbon, silicone, and hydrocarbon, a generalized surface packing index is introduced which is independent of the chemical nature of the surfactants. This parameter 蠒_cmc represents the volume fraction of surfactant chain fragments in a surface film at the aqueous cmc. It is shown that 蠒_cmc is a useful index for understanding the limiting surface tension of surfactants and can be useful for designing new superefficient surfactants.