Lateral interactions among phospholipid head groups at the heptane/water interface

Langmuir ◽  
1988 ◽  
Vol 4 (1) ◽  
pp. 200-209 ◽  
Author(s):  
Dirk Stigter ◽  
Ken A. Dill
Keyword(s):  
Water Interface ◽  
Lateral Interactions ◽  
Head Groups

scholarly journals Synthesis and aqueous solution properties of homologous gemini surfactants with different head groups

2007 ◽  
Vol 5 (2) ◽  
pp. 620-634 ◽  
Author(s):  
Yuhai Sun ◽  
Yujun Feng ◽  
Hongwei Dong ◽  
Zhi Chen ◽  
Likun Han
Keyword(s):  
Aqueous Solution ◽  
Gemini Surfactant ◽  
Gemini Surfactants ◽  
Structural Features ◽  
Water Interface ◽  
Solution Properties ◽  
Surface Activities ◽  
Head Groups ◽  
Air Water Interface ◽  
Monomeric Surfactants

AbstractA series of homologous gemini surfactants possessing identical hydrophobic chains but different ionic head groups (cationic, anionic, zwitterionic) were synthesized, and their aqueous solution properties were examined. The results showed that the surface activities of gemini surfactants are superior to those of corresponding conventional monomeric surfactants, and molecular arrangements of gemini surfactants at the air-water interface are tighter than those of corresponding conventional surfactants. It was also found that zwitterionic gemini surfactant possesses the highest surface activity among the three surfactants. The behavior at the air-water interface is closely related to the molecular structural features of surfactants, which provide an indication for synthesizing highly-efficient surfactants.

Effect of head groups on the phase transitions in Gibbs adsorption layers at the air–water interface

2010 ◽  
Vol 348 (1) ◽  
pp. 146-151 ◽  
Author(s):  
Md. Mufazzal Hossain ◽  
Kenichi Iimura ◽  
Masaki Yoshida ◽  
Takaya Sakai ◽  
Teiji Kato
Keyword(s):  
Phase Transitions ◽  
Water Interface ◽  
Head Groups ◽  
Air Water Interface ◽  
Adsorption Layers

What are surfactants?

Surfactants ◽  
2019 ◽  
pp. 3-16 ◽  
Author(s):  
Bob Aveyard
Keyword(s):  
Water Interface ◽  
Concentrated Solutions ◽  
Dual Nature ◽  
Surfactant Aggregates ◽  
Ionic Adsorption ◽  
Surface Active Agents ◽  
Head Groups ◽  
Surface Active ◽  
Oil Water

Surface active agents (surfactants) are molecules or ions with a dual nature. One or more moieties in a surfactant are ‘water-hating’ (hydrophobic) ‘tail’ groups and one or more are ‘water-liking’ (hydrophilic) ‘head’ groups. Surfactants adsorb from aqueous (or other) solution to various interfaces and in sufficiently concentrated solutions simultaneously aggregate into micelles or other structures. The tail(s) are frequently hydrocarbon or fluorocarbon groups and the head(s) can be polar or ionic. Adsorption and aggregation are often driven by removal of tails from water to an air/water or nonpolar oil/water interface, or to the interior of surfactant aggregates. The ability to adsorb and to aggregate in solution makes surfactants invaluable in industry, in nature, and in the home. Here a brief description is given of the classes of surfactant most commonly encountered, and their usefulness is mentioned. Forward reference is made to appropriate chapters where material is covered in more detail.

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