Citation: WU Xiao-Na, ZOU Wen-Sheng, ZHAO Jian-Xi. Highly Stable Foams Generated by the Gemini Surfactant Ethanediyl-α,ω-bis(tetradecyldimethylammonium bromide)[J]. Acta Physico-Chimica Sinica, ;2012, 28(05): 1213-1217. doi: 10.3866/PKU.WHXB201203053 shu

Highly Stable Foams Generated by the Gemini Surfactant Ethanediyl-α,ω-bis(tetradecyldimethylammonium bromide)

1.
Institute of Colloid and Interface Chemistry, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, P. R. China

Received Date: 20 December 2011
Available Online: 5 March 2012
Fund Project: 国家自然科学基金(20673021, 20873024) (20673021, 20873024)福建省自然科学基金(2010J01038)资助项目 (2010J01038)

This paper reports a highly stable foam system generated by the gemini surfactant ethanediyl- α,ω-bis(tetradecyldimethylammonium bromide) (referred to as 14-2-14). The time measured for the collapse of the foam to half its initial height was used to characterize the foam stability; it was as high as 961 min for this system and significantly longer than that (754 min) for ethanediyl-α,ω-bis(dodecyldimethylammonium bromide) (12-2-12) foams. Thus the gemini surfactant structure of a short spacer together with two long tails enabled it to be a highly efficient foam stabilizer. The dilational rheology of the adsorbed films revealed the relationship between the interfacial elasticity and the foam stability. The high-frequency limit of elasticity of the adsorbed film at a specific surface coverage was again found to indicate foam stability. A larger limit of elasticity indicated a more stable foam.
- Foam stabilizer,
- Gemini surfactant,
- Short spacer,
- Long tail,
- High interfacial-elasticity
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沈阳化工大学材料科学与工程学院沈阳 110142